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| Number | Title | Issue Date |
| 5504415 | Method and apparatus for automatic equalization of series-connected batteries A method and an apparatus (10) for equalizing the state of charge among a plurality of series-connected batteries (B1-BN). A module (12A-12N) is connected in parallel with each of the batteries (B1-BN), respectively. Each module (12A-12N) contains a volta... | 04/02/1996 |
| 5469042 | Charging monitor for electrical accumulators The invention relates to a circuit apparatus for the charge and discharge monitoring of electrical accumulators (20) or accumulator cells connected to one another in series to a charging current source (28). The apparatus includes one monitoring module (2... | 11/21/1995 |
| 5283512 | Charge balancing of batteries during charging A battery system comprises a plurality of sodium-sulfur storage cells connected in series to form a battery, with voltage measurement leads attached across each of the individual storage cells. A charge-limiting circuit controllably isolates an individual... | 02/01/1994 |
| 5270635 | Universal battery charger A battery charger of the driven blocking oscillator type includes a three-winding transformer. The primary winding is connected in series with the collector-emitter path of a switching transistor. The secondary winding is connected in series with the coll... | 12/14/1993 |
| 5256957 | Process and circuit versions for charging accumulators Process for charging accumulators and circuit versions for implementing said process. The charging state of a 100% charged accumulator is determined by the detection of an extreme value in the trend of a parameter (S), which is related to the inner voltag... | 10/26/1993 |
| 5153496 | Cell monitor and control unit for multicell battery A cell monitoring and control circuit for a multicell battery comprises a cell access switch coupled to the cells of the battery for electronically accessing individual cells of the battery and a monitoring and control circuit coupled to the cell access s... | 10/06/1992 |
| 4719401 | Zener diode looping element for protecting a battery cell A special zener diode is disclosed which is shunted across each cell in a series connected string of battery cells. In response to a cell failure which causes a cell to open circuit, all battery current is routed through the zener diode looping element. T... | 01/12/1988 |
| 4713597 | Silicon diode looping element for protecting a battery cell A special silicon diode is disclosed which is shunted across each cell in a series connected string of battery cells. In response to a cell failure which causes a cell to open circuit, all battery current is routed through the diode looping element. This ... | 12/15/1987 |
| 4614905 | Charging regulator An autonomous regulator for regulating the charging current to the individual cells in a battery. The regulator shunts the portion of the trickle current which constitutes an excess to the charging current. There is thus provided an optimum charge for eac... | 09/30/1986 |
| 4502000 | Device for balancing parallel strings A battery plant is described which features magnetic circuit means in association with each of the battery strings in the battery plant for balancing the electrical current flow through the battery strings by equalizing the voltage across each of the batt... | 02/26/1985 |
| 4502001 | Current balancing for battery strings A battery plant is described which features magnetic circuit means for balancing the electrical current flow through a pluraliircuitbattery strings which are connected electrically in parallel. The magnetic circuit means is associated with the battery str... | 02/26/1985 |
| 4349773 | Circuit for protecting storage cells Circuit for the uniform charging and discharging of electrochemical storage cells of the alkali metal and chalcogen type having a protective element in the circuit. The protective element is a container filled with a chemical compound which easily dissoci... | 09/14/1982 |
| 4303877 | Circuit for protecting storage cells Battery formed of electrochemical storage cells of the alkali metal and chalcogen type in series or groups of several parallel-connected storage cells connected in series. To assure uniform charging and discharging of the storage cells, each series-connec... | 12/01/1981 |
| 4238721 | System and method for charging electrochemical cells in series A battery charging system capable of equalizing the charge of each individual cell at a selected full charge voltage includes means for regulating charger current to first increase current at a constant rate until a bulk charging level is achieved or unti... | 12/09/1980 |
| 4233554 | Vent actuated shorting switch In a high voltage, high ampere battery, a shorting bar is placed on the top f each battery cell vent cap for providing a shorting switch between two extensions from respective cell terminals in response to excessive cell pressure dislocating the vent cap. ... | 11/11/1980 |
| 4061955 | Multi-cell battery protection system A multi-cell battery protection system is provided wherein each cell has its own individual protective circuit. The protective circuits each comprise a solid state comparator unit and a high current switching device such as a relay. The comparator units e... | 12/06/1977 |
