DE29620628U1 - Self-learning device for determining the state of charge of accumulators - Google Patents
Self-learning device for determining the state of charge of accumulatorsInfo
- Publication number
- DE29620628U1 DE29620628U1 DE29620628U DE29620628U DE29620628U1 DE 29620628 U1 DE29620628 U1 DE 29620628U1 DE 29620628 U DE29620628 U DE 29620628U DE 29620628 U DE29620628 U DE 29620628U DE 29620628 U1 DE29620628 U1 DE 29620628U1
- Authority
- DE
- Germany
- Prior art keywords
- state
- charge
- accumulators
- voltage
- self
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
-
- 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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
- G01R31/379—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator for lead-acid batteries
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pinball Game Machines (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Elimination Of Static Electricity (AREA)
Description
Gebrauchsmusteranmeldung: Selbstlernende'Vo'fricftturtg zur
Ermittlung des Ladezustandes von AkkumulatorenUtility model application: Self-learning'Vo'fricftturtg for
Determination of the charge level of batteries
Anmelder: Helix Solarelektronik GmbH
Beschreibung Seite 1
Allgemeine BeschreibungApplicant: Helix Solarelektronik GmbH
Description Page 1
general description
Bei der Erfindung handelt es sich um eine Vorrichtung, mit deren Hilfe der Ladezustand von Akkumulatoren (insbesondere von Bleiakkumulatoren) ermittelt werden kann. Voraussetzung für einen erfolgreichen Einsatz der Vorrichtung ist, daß der Ladezustand des Akkumulators von seiner Spannung im Ruhezustand abgeleitet werden kann. Die Vorrichtung ist dabei in der Lage, sich selbsttätig an den Akkumulator anzupassen.The invention is a device with the help of which the charge level of accumulators (in particular lead accumulators) can be determined. The prerequisite for successful use of the device is that the charge level of the accumulator can be derived from its voltage in the idle state. The device is able to adapt itself automatically to the accumulator.
Technische Beschreibung (siehe hierzu auch Abb.l)Technical description (see also Fig.l)
Bei vielen Akkumulatoren (insbesondere bei Bleiakkumulatoren) kann durch Ermittlung der Spannung im Ruhezustand (Uo) der Ladezustand des Akkumulators genau ermittelt werden. Dies ist aber nicht mehr möglich, sobald der Akkumulator geladen oder entladen wird. Beim Laden oder Entladen fällt am Innenwiderstand des Akkumulators eine Spannung ab, so daß an den Akkumulatorklemmen nur noch die um diesen Spannungsabfall verfälschte Ruhespannung (Klemmenspannung Uk) gemessen werden kann. Durch Verwendung eines entsprechenden Kennlinienmodells kann auf die Ruhespannung und den Ladezustand rückgeschlossen werden. Das Kennlinienmodell kann auch Nichtlinearitäten des Innenwiderstandes berücksichtigen. Als Bestandteil des Innenwiderstandes kann das Säurekonzentrationsgefälle zwischen dem inneren der Akkumulatorplatte und der die Platte umgebenden Säure gesehen werden. Da der Aufbau dieses Säurekonzentrationsgefälles etwas Zeit benötigt, muß dem Kennlinienmodell eine entsprechende Zeitverzögerung beinhalten, um nicht hohe Fehler im dynamischen Betrieb zu erhalten.For many accumulators (particularly lead accumulators), the charge level of the accumulator can be determined precisely by determining the voltage in the rest state (Uo). However, this is no longer possible as soon as the accumulator is charged or discharged. When charging or discharging, a voltage drops across the internal resistance of the accumulator, so that only the rest voltage (terminal voltage Uk) distorted by this voltage drop can be measured at the accumulator terminals. By using an appropriate characteristic model, conclusions can be drawn about the rest voltage and the charge level. The characteristic model can also take non-linearities of the internal resistance into account. The acid concentration gradient between the inside of the accumulator plate and the acid surrounding the plate can be seen as a component of the internal resistance. Since the build-up of this acid concentration gradient takes some time, the characteristic model must include an appropriate time delay in order to avoid high errors in dynamic operation.
So ein Kennlinienmodell hat jedoch den Nachteil, daß der dem Modell zugrundeliegende Innenwiderstand (mitsamt seiner Nichtlinearitäten) von der Akkumulatorkapazität, der Bauform des Akkumulators sowie dem Alter des Akkumulators abhängt. Deshalb wurde das hier beschriebene Kennlinienmodell um eine Eichvorrichtung ergänzt, die es ermöglicht, den Innenwiderstand (inclusive aller Nichtlinearitäten) der dem Kennlinienmodell zugrunde liegt, an den tätsächliche Akkumulatorinnenwiderstand anzupassen.However, such a characteristic model has the disadvantage that the internal resistance underlying the model (including its non-linearities) depends on the battery capacity, the design of the battery and the age of the battery. Therefore, the characteristic model described here has been supplemented by a calibration device that makes it possible to adapt the internal resistance (including all non-linearities) underlying the characteristic model to the actual internal battery resistance.
Gebrauchsmusteranmeldung: Selbstlernende Vorrichtung zur
Ermittlung des Ladezustandes von AkkumulatorenUtility model application: Self-learning device for
Determination of the charge level of batteries
Anmelder: Helix Solarelektronik GmbHApplicant: Helix Solarelektronik GmbH
Beschreibung Seite 2Description Page 2
Fortsetzung Technische BeschreibungContinuation of technical description
Die Eichvorrichtung beinhaltet eine Eicherkennung. Wie schon beschrieben, kann aus der Ruhespannung genau ermittelt werden, welchen Ladezustand der Akkumulator hat. Da sich die Ruhespannung an den Klemmen erst nach einer Wartezeit mit hinreichender Genauigkeit einstellt (da sich das verfälschende Säurekonzentrationsgefälle erst mit der Zeit abbaut) wird eine Ruheerkennung benötigt, welche einen Zeitgeber startet. Falls der Ruhezustand die dem Zeitgeber eigene Wartezeit überschreitet, wird die Eichung freigegeben. Falls der Ruhezustand vor Ablauf der Wartezeit unterbrochen wird, wird der Zeitgeber zurückgesetzt. Die Ruheerkennung sorgt aber nicht nur für den Start des Zeitgebers, sondern friert auch den momentanen Anzeigewert ein, der durch das Kennlinienmodell ermittelt wurde. Dies ist logisch dadurch begründet, daß sich im Ruhezustand der Ladezustand eigentlich nicht ändern darf (Selbstentladung wird in diesem Fall vernachlässigt, da sich der Ruhezustand in wenigen Stunden einstellt, während die Selbstentladung allenfalls in Wochenfrist zu einer nennenswerten Veränderung führt).The calibration device includes a calibration detection. As already described, the rest voltage can be used to determine exactly what state of charge the battery has. Since the rest voltage at the terminals only appears with sufficient accuracy after a waiting period (since the falsifying acid concentration gradient only decreases over time), a rest detection is required which starts a timer. If the rest state exceeds the timer's own waiting period, calibration is released. If the rest state is interrupted before the waiting period has elapsed, the timer is reset. The rest detection not only ensures that the timer starts, but also freezes the current display value that was determined by the characteristic model. This is logically justified by the fact that the state of charge should not actually change in the rest state (self-discharge is neglected in this case, since the rest state occurs in a few hours, while self-discharge leads to a significant change at most within a week).
Sobald der Eichvorgang freigegeben ist, wird der Ladezustand aufgrund der Akkumulatorklemmenspannung ermittelt. Dieser neu ermittelte Ladezustand wird mit dem vorher eingefrorenen Ladezustand verglichen. Ergibt der Vergleich einen Fehler, wird diese Information dazu genutzt um den Innenwiderstand im Kennlinienmodell entsprechend anzupassen.As soon as the calibration process is released, the charge level is determined based on the battery terminal voltage. This newly determined charge level is compared with the previously frozen charge level. If the comparison results in an error, this information is used to adjust the internal resistance in the characteristic model accordingly.
Alternativ zur Ruhespannung kann als Eichkriterieum auch der Vollladezustand (Eichkriterium: hohe Spannung trotz kleinem Ladestrom) oder der Zustand vollständiger Entladung (Eichkriterium: geringe Spannung trotz kleinem Entladestrom) herangezogen werden. Dies ist aber nur möglich, wenn die dem Kennlinienmodell nachgeschaltete Zeitverzögerung in etwa ( etwas kleiner bis maximal gleich) dem tatsächlichen Zeitverhalten des Ladezustands entspricht. Die Eicherkennung benötigt im diesem Fall keinen Zeitgeber.As an alternative to the rest voltage, the full charge state (calibration criterion: high voltage despite low charging current) or the state of complete discharge (calibration criterion: low voltage despite low discharging current) can also be used as a calibration criterion. However, this is only possible if the time delay following the characteristic curve model corresponds approximately (slightly less than or equal to) the actual time behavior of the charge state. In this case, the calibration detection does not require a timer.
Gebrauchsmusteranmeldung: Selbstlernende Vorrichtung" zur
Ermittlung des Ladezustandes von AkkumulatorenUtility model application: Self-learning device for
Determination of the charge level of batteries
Anmelder: Helix Solarelektronik GmbH
Beschreibung Seite 3
Vorteile der ErfindungApplicant: Helix Solarelektronik GmbH
Description Page 3
Advantages of the invention
Die beschriebene Vorrichtung hat den Vorteil, daß eine relativ genaue Ladezustandsbestimmung am Akkumulator möglich ist, ohne daß diese Vorrichtung an den tatsächlich verwendeteten Akkumulator angepasst werden muß. Auch bei Alterung führt der Einsatz dieser Vorrichtung zu einer automatischen Anpassung an den Akkumulator und vermeidet dadurch große Anzeigefehler.The device described has the advantage that a relatively precise determination of the charge level of the accumulator is possible without this device having to be adapted to the accumulator actually used. Even with age, the use of this device leads to an automatic adaptation to the accumulator and thus avoids major display errors.
Anwendung der ErfindungApplication of the invention
Die beschriebene Vorrichtung kann als Bestandteil von Schutzeinrichtungen gegen Überladung und Tiefentladung von Akkumulatoren eingesetzt werden. Darüber hinaus ist ein Einsatz als Anzeigeinstrument möglich.The device described can be used as a component of protective devices against overcharging and deep discharging of batteries. It can also be used as a display instrument.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29620628U DE29620628U1 (en) | 1996-11-27 | 1996-11-27 | Self-learning device for determining the state of charge of accumulators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29620628U DE29620628U1 (en) | 1996-11-27 | 1996-11-27 | Self-learning device for determining the state of charge of accumulators |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29620628U1 true DE29620628U1 (en) | 1997-07-10 |
Family
ID=8032525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29620628U Expired - Lifetime DE29620628U1 (en) | 1996-11-27 | 1996-11-27 | Self-learning device for determining the state of charge of accumulators |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE29620628U1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0987555A2 (en) * | 1998-09-18 | 2000-03-22 | Matsushita Electric Industrial Co., Ltd. | Method of measuring quantities indicating state of electrochemical device and apparatus for the same |
WO2001042804A1 (en) * | 1999-12-06 | 2001-06-14 | Alain Leroy | Device for controlling a storage battery condition |
US6630814B2 (en) | 2000-12-19 | 2003-10-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for calibrating a rechargeable battery |
-
1996
- 1996-11-27 DE DE29620628U patent/DE29620628U1/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0987555A2 (en) * | 1998-09-18 | 2000-03-22 | Matsushita Electric Industrial Co., Ltd. | Method of measuring quantities indicating state of electrochemical device and apparatus for the same |
EP0987555A3 (en) * | 1998-09-18 | 2000-12-06 | Matsushita Electric Industrial Co., Ltd. | Method of measuring quantities indicating state of electrochemical device and apparatus for the same |
US6262577B1 (en) | 1998-09-18 | 2001-07-17 | Matsushita Electric Industrial Co., Ltd. | Method of measuring quantities indicating state of electrochemical device and apparatus for the same |
WO2001042804A1 (en) * | 1999-12-06 | 2001-06-14 | Alain Leroy | Device for controlling a storage battery condition |
US6630814B2 (en) | 2000-12-19 | 2003-10-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for calibrating a rechargeable battery |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 19970821 |
|
R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20000614 |
|
R081 | Change of applicant/patentee |
Owner name: ZIMMERMANN, ANTON, DE Free format text: FORMER OWNER: HELIX SOLARELEKTRONIK GMBH, 89171 ILLERKIRCHBERG, DE Effective date: 20001102 Owner name: COMMERELL, WALTER, DE Free format text: FORMER OWNER: HELIX SOLARELEKTRONIK GMBH, 89171 ILLERKIRCHBERG, DE Effective date: 20001102 Owner name: ADELMANN, CHRISTEL, DE Free format text: FORMER OWNER: HELIX SOLARELEKTRONIK GMBH, 89171 ILLERKIRCHBERG, DE Effective date: 20001102 Owner name: ADELMANN, PETER, PROF., DE Free format text: FORMER OWNER: HELIX SOLARELEKTRONIK GMBH, 89171 ILLERKIRCHBERG, DE Effective date: 20001102 Owner name: ECKEL, HARALD, DE Free format text: FORMER OWNER: HELIX SOLARELEKTRONIK GMBH, 89171 ILLERKIRCHBERG, DE Effective date: 20001102 |
|
R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20030512 |
|
R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20050426 |
|
R071 | Expiry of right |