DE29612870U1 - Arrangement for charging and testing battery packs - Google Patents
Arrangement for charging and testing battery packsInfo
- Publication number
- DE29612870U1 DE29612870U1 DE29612870U DE29612870U DE29612870U1 DE 29612870 U1 DE29612870 U1 DE 29612870U1 DE 29612870 U DE29612870 U DE 29612870U DE 29612870 U DE29612870 U DE 29612870U DE 29612870 U1 DE29612870 U1 DE 29612870U1
- Authority
- DE
- Germany
- Prior art keywords
- charging
- arrangement
- battery cell
- battery
- control unit
- 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
Classifications
-
- H02J7/575—
-
- 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
-
- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Description
Helmut Mack, 72764 ReutlingenHelmut Mack, 72764 Reutlingen
358/10 19. Juli 1996358/10 19 July 1996
K/niK/ni
Beschreibung 10 Description 10
Die vorliegende Erfindung betrifft eine Anordnung zum Laden und Testen von Akkupacks mit mehreren in Reihe geschalteten Akkuzellen.The present invention relates to an arrangement for charging and testing battery packs with several battery cells connected in series.
In NiCd bzw. NiMH-Akkupacks, die in der Regel aus mehreren Einzelzellen bestehen, sind eine bestimmte Anzahl von Zellen entsprechend der gewünschten Nennspannung und der Kapazität in Reihe geschaltet. Jede einzelne Akkuzelle hat ein individuelles Spannungsverhalten während des Ladevorgangs.In NiCd or NiMH battery packs, which usually consist of several individual cells, a certain number of cells are connected in series according to the desired nominal voltage and capacity. Each individual battery cell has an individual voltage behavior during the charging process.
Die Spannung einer Akkuzelle steigt während des Ladevorgangs stetig mit einer gewissen Steigung an und überschreitet beim Erreichen des Voll-Ladezustands ein Maximum. Wird dieses Maximum überschritten, wir die Akkuzelle durch Überladung irreparabel geschädigt bzw. die Lebensdauer vermindert.The voltage of a battery cell increases steadily at a certain rate during the charging process and exceeds a maximum when the full charge level is reached. If this maximum is exceeded, the battery cell is irreparably damaged by overcharging or its service life is reduced.
2Q Umgekehrt kann bei der Entladung eine Akkuzelle geschädigt werden, wenn eine langandauernde Tiefentladung erfolgt, d. h., wenn durch die entladene Akkuzelle ein Strom getrieben wird, bis sich die Klemmenspannung umpolt. Bei bekannten Anordnungen werden die in Reihe geschalteten Akkuzellen mit2Q Conversely, a battery cell can be damaged during discharge if a long-lasting deep discharge occurs, i.e. if a current is driven through the discharged battery cell until the terminal voltage is reversed. In known arrangements, the battery cells connected in series are
cc einem bestimmten Ladestrom durchflossen und an den Klemmen der Reihenschaltung zeigt sich während der Ladephase die Summenspannung der einzelnen Zellenspannungen. Ist in der Reihenschaltung eine Akkuzelle defekt, so weist zwar die Reihenschaltung eine verminderte Spannung auf, wobei diescc a certain charging current flows through it and the total voltage of the individual cell voltages is shown at the terminals of the series connection during the charging phase. If a battery cell in the series connection is defective, the series connection will have a reduced voltage, but this
• '• '
* &idigr; 2 ·** &id; 2 ·*
jedoch auch andere Ursachen haben kann und daher nicht unbedingt auf eine defekte einzelne Akkuzelle geschlossen
werden kann.
5However, this can also have other causes and therefore cannot necessarily be attributed to a defective individual battery cell.
5
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Anordnung vorzuschlagen, bei der die Erkennung von Defekten in geschlossenen Akkupacks während des Ladevorgangs sicher erkannt werden kann.The present invention is therefore based on the object of proposing an arrangement in which defects in closed battery packs can be reliably detected during the charging process.
Die Lösung dieser Aufgabe erfolgt mit einer Anordnung mit den Merkmalen des Hauptanspruchs. Weitere vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.This problem is solved with an arrangement having the features of the main claim. Further advantageous embodiments can be found in the subclaims.
Die Anordnung weist zwei getrennt regelbare Ladestromkreise auf, die über einen Mittelangriff jeweils eine Gruppe der Akkuzellen angeschlossen und über eine Steuereinheit regelbar sind. Die Steuereinheit, beispielsweise Mikroprozessor oder Rechner übernimmt die Steueraufgabe und erfaßt über einen Analog/Digitalwandler fortlaufend die Istwert-Summenspannung der beiden Akkuzellengruppen und steuert die den Stromkreisen zugehörigen Regler. Zusätzlich wird auch die Temperatur der zwei Akkuzellengruppen der Steuereinheit zugeführt, um das Abschalten bei starker Überhitzung zu ermöglichen.The arrangement has two separately controllable charging circuits, each of which is connected to a group of battery cells via a central connection and can be controlled via a control unit. The control unit, for example a microprocessor or computer, takes over the control task and continuously records the actual total voltage of the two battery cell groups via an analog/digital converter and controls the controllers associated with the circuits. In addition, the temperature of the two battery cell groups is also fed to the control unit in order to enable shutdown in the event of severe overheating.
Die Steuereinheit führt gemäß einem bevorzugtenThe control unit performs according to a preferred
Ausführungsbeispiel einen Vergleich der Ist-Werte der Summenspannung der Akkuzellengruppen durch und schaltet bei deutlicher Abweichung der Summenspannungen voneinander den 3Q Ladevorgang ab. Die Abweichung kann beispielsweise 10% bezogen auf die Nennspannung sein.In this embodiment, the system compares the actual values of the total voltage of the battery cell groups and switches off the 3Q charging process if the total voltages differ significantly from one another. The deviation can be, for example, 10% relative to the nominal voltage.
Die erfindungsgemäße Anordnung ermöglichst somit das Erkennen von Defekten in geschlossenen Akkupacks während des Ladevorgangs und ein präzises Abschalten des Ladevorgangs jeder einzelnen Gruppe bei Erreichen der maximalen Summenspannung.The arrangement according to the invention thus enables the detection of defects in closed battery packs during the charging process and a precise shutdown of the charging process of each individual group when the maximum total voltage is reached.
Nachfolgend wird die Erfindung in Verbindung mit den begleitenden Zeichnungen noch näher erläutert.The invention is explained in more detail below in conjunction with the accompanying drawings.
Figur 1 zeigt den Grundaufbau der Schaltungsanordnung mit zwei Stromquellen undFigure 1 shows the basic structure of the circuit arrangement with two current sources and
Figur 2 ein detaillierter Aufbau der Spannungsanordnung mit einer Stromquelle und zugehörigen Schalteinrichtungen. Figure 2 shows a detailed structure of the voltage arrangement with a current source and associated switching devices.
In Figur 1 ist symbolisch ein Akkupack mit zehn einzelnen , Akkuzellen 1 dargestellt, wobei jeweils fünf Akkuzellen 1 über den Mittelabgriff 2 mit einer getrennten Stromquelle mit Regler 3 bzw. 4 verbunden sind. Mittels einer Steuereinheit werden die Stromquellen unabhängig voneinander in Abhängigkeit von der an der jeweiligen Akkuzellengruppe 6 bzw. 7 anliegenden Spannung gesteuert. Die Spannung wird erfaßt und mittels entsprechender Analog/Digitalwandler 8 bzw. 9 der Steuereinheit 5 zugeführt. Außerdem werden die Temperaturwerte der einzelnen Akkuzellengruppen 6 bzw. 7 erfaßt und über nicht dargestellte Analog/Digitalwandler ebenfalls der Steuereinheit zugeführt.Figure 1 symbolically shows a battery pack with ten individual battery cells 1, with five battery cells 1 each connected to a separate power source with regulator 3 or 4 via the center tap 2. The power sources are controlled independently of one another by means of a control unit depending on the voltage applied to the respective battery cell group 6 or 7. The voltage is recorded and fed to the control unit 5 by means of corresponding analog/digital converters 8 or 9. In addition, the temperature values of the individual battery cell groups 6 or 7 are recorded and also fed to the control unit via analog/digital converters (not shown).
In Figur 2 ist ein Schaltmodul 10 gezeigt f das über die Anschlußleitungen 11, 12, 13 mit einem gestrichelt dargestellten Akkupack 14 derart verbunden ist, daß die in dem Akkupack angeordneten Akkuzellen 1 über einen Mittelabgriff 2 in zwei Akkuzellengruppen 6 und 7 unterteiltFigure 2 shows a switching module 10 which is connected via the connecting lines 11, 12, 13 to a battery pack 14 shown in dashed lines in such a way that the battery cells 1 arranged in the battery pack are divided into two battery cell groups 6 and 7 via a center tap 2.
go werden. Durch entsprechende Schalter Rl, R2 bzw. R4, R5 werden die Ladestromkreise für die Akkuzellengruppen 6, 7 gebildet. Diese sind über die Steuereinheit getrennt schaltbar. Eine Stromquelle 5 ist an den Eingangsklemmen und 17 angeschlossen. Mittels der Schalter R3 und R6 kann diego. The charging circuits for the battery cell groups 6, 7 are formed by corresponding switches Rl, R2 or R4, R5. These can be switched separately via the control unit. A power source 5 is connected to the input terminals 1 and 17. The
og Meßspannung der einzelnen Gruppen abgefragt und über den Analog/Digitalwandler 18 der Steuereinheit zugeführt werden.The above-mentioned measuring voltage of the individual groups is queried and fed to the control unit via the analog/digital converter 18.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29612870U DE29612870U1 (en) | 1996-07-25 | 1996-07-25 | Arrangement for charging and testing battery packs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29612870U DE29612870U1 (en) | 1996-07-25 | 1996-07-25 | Arrangement for charging and testing battery packs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29612870U1 true DE29612870U1 (en) | 1996-10-17 |
Family
ID=8026945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29612870U Expired - Lifetime DE29612870U1 (en) | 1996-07-25 | 1996-07-25 | Arrangement for charging and testing battery packs |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE29612870U1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19753210A1 (en) * | 1997-12-01 | 1999-07-01 | Gruendl & Hoffmann | Rechargeable electrical power source |
| DE19836141C1 (en) * | 1998-08-10 | 2000-06-15 | Ceag Sicherheitstechnik Gmbh | Method and monitoring device for monitoring at least one battery pack that can be connected for the emergency supply of electrical and / or electronic consumers |
| DE102010038587A1 (en) * | 2010-07-28 | 2012-02-02 | Metabowerke Gmbh | Method for cell measurement in rechargeable battery pack, involves determining group voltages in cell groups, and checking cell groups whether each cell of group exhibits permissible cell voltage depending on group voltage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3305754A (en) * | 1963-06-04 | 1967-02-21 | Frederick Res Corp | Charging apparatus for multicell batteries |
| GB2109182A (en) * | 1981-10-02 | 1983-05-25 | Tools Ltd Nv | Monitoring battery charging |
| WO1993010590A1 (en) * | 1991-11-20 | 1993-05-27 | Silent Power Gmbh Für Energiespeichertechnik | Battery management system |
| DE4327996A1 (en) * | 1992-08-21 | 1994-03-03 | Btech Inc | Device for measuring the impedance of a connected battery |
| WO1995015604A1 (en) * | 1993-12-03 | 1995-06-08 | Electronic Power Technology, Inc. | Method and apparatus for automatic equalization of series-connected batteries |
| DE4408740C1 (en) * | 1994-03-15 | 1995-07-20 | Sonnenschein Accumulatoren | Circuit arrangement for checking a multi-cell battery |
| DE19541595A1 (en) * | 1994-11-09 | 1996-05-15 | Fuji Heavy Ind Ltd | Method for controlling the charging / discharging of the battery of an electric vehicle |
-
1996
- 1996-07-25 DE DE29612870U patent/DE29612870U1/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3305754A (en) * | 1963-06-04 | 1967-02-21 | Frederick Res Corp | Charging apparatus for multicell batteries |
| GB2109182A (en) * | 1981-10-02 | 1983-05-25 | Tools Ltd Nv | Monitoring battery charging |
| WO1993010590A1 (en) * | 1991-11-20 | 1993-05-27 | Silent Power Gmbh Für Energiespeichertechnik | Battery management system |
| DE4327996A1 (en) * | 1992-08-21 | 1994-03-03 | Btech Inc | Device for measuring the impedance of a connected battery |
| WO1995015604A1 (en) * | 1993-12-03 | 1995-06-08 | Electronic Power Technology, Inc. | Method and apparatus for automatic equalization of series-connected batteries |
| DE4408740C1 (en) * | 1994-03-15 | 1995-07-20 | Sonnenschein Accumulatoren | Circuit arrangement for checking a multi-cell battery |
| DE19541595A1 (en) * | 1994-11-09 | 1996-05-15 | Fuji Heavy Ind Ltd | Method for controlling the charging / discharging of the battery of an electric vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19753210A1 (en) * | 1997-12-01 | 1999-07-01 | Gruendl & Hoffmann | Rechargeable electrical power source |
| DE19836141C1 (en) * | 1998-08-10 | 2000-06-15 | Ceag Sicherheitstechnik Gmbh | Method and monitoring device for monitoring at least one battery pack that can be connected for the emergency supply of electrical and / or electronic consumers |
| DE102010038587A1 (en) * | 2010-07-28 | 2012-02-02 | Metabowerke Gmbh | Method for cell measurement in rechargeable battery pack, involves determining group voltages in cell groups, and checking cell groups whether each cell of group exhibits permissible cell voltage depending on group voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19961128 |
|
| R163 | Identified publications notified |
Effective date: 19970219 |
|
| R156 | Lapse of ip right after 3 years |
Effective date: 20000503 |