ADVANCED RECHARGEABLE BATTERY SYSTEM
First Claim
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1. A rechargeable battery system having a plurality of cells and a charging means for charging the rechargeable battery system, comprisinga plurality of cells electrically connected to form a rechargeable battery system;
- a self-discharge voltage measuring means for continually measuring a self-discharge voltage and a corresponding self-discharging means, both connected in parallel to at least one of a cell in a series circuit, a cell set in a series circuit and a cell pack in a series circuit;
an over-charge voltage measuring means for continually measuring an over-charge voltage across at least one of a cell in a series circuit, a cell set in a series circuit and a cell pack in a series circuit;
a charging means connected in series with the rechargeable battery system for charging all of the cells of the rechargeable battery system;
a system voltage measuring means for continually measuring a system voltage across the charging means;
a limiting means for limiting the charging current of the rechargeable battery system; and
a controlling means for controlling the rechargeable battery system, wherein;
(a) during charging, if the self-discharge voltage measured by any one of the self-discharge voltage measuring means is ≧
a preset self-discharge voltage, then, the corresponding self-discharging means operates until the measured self-discharge voltage is equal to the preset self-discharge voltage, then, the corresponding self-discharging means does not operate; and
(b) during charging, if any of the measured over-charge voltages is >
a preset overcharge voltage, then, the charging current to the rechargeable battery system is limited, then, when all the measured over-charge voltages are ≦
a preset first resume voltage, then, the charging current to the rechargeable battery system is not limited; and
(c) during charging, if the measured system voltage is >
a preset overall voltage, then, the charging current to the rechargeable battery system is limited, then, when the measured system voltage is ≦
the preset second resume voltage, then, the charging current to the rechargeable battery system is not limited; and
(d) during charging, if the period of time for the charging current to the rechargeable battery system being limited is >
a preset period of time, then, the charging current to the rechargeable battery system is not limited.
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Abstract
A rechargeable battery system having a plurality of cells in series circuits for high voltage applications. Cells, cell sets and cell packs in series circuits are protected from over-charging with self-discharging devices. The rechargeable battery system is protected from over-charging and over-discharging and charging is controlled to be resumed by an over-charge/over-discharge printed circuit board or the charger.
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Citations
19 Claims
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1. A rechargeable battery system having a plurality of cells and a charging means for charging the rechargeable battery system, comprising
a plurality of cells electrically connected to form a rechargeable battery system; -
a self-discharge voltage measuring means for continually measuring a self-discharge voltage and a corresponding self-discharging means, both connected in parallel to at least one of a cell in a series circuit, a cell set in a series circuit and a cell pack in a series circuit; an over-charge voltage measuring means for continually measuring an over-charge voltage across at least one of a cell in a series circuit, a cell set in a series circuit and a cell pack in a series circuit; a charging means connected in series with the rechargeable battery system for charging all of the cells of the rechargeable battery system; a system voltage measuring means for continually measuring a system voltage across the charging means; a limiting means for limiting the charging current of the rechargeable battery system; and a controlling means for controlling the rechargeable battery system, wherein; (a) during charging, if the self-discharge voltage measured by any one of the self-discharge voltage measuring means is ≧
a preset self-discharge voltage, then, the corresponding self-discharging means operates until the measured self-discharge voltage is equal to the preset self-discharge voltage, then, the corresponding self-discharging means does not operate; and(b) during charging, if any of the measured over-charge voltages is >
a preset overcharge voltage, then, the charging current to the rechargeable battery system is limited, then, when all the measured over-charge voltages are ≦
a preset first resume voltage, then, the charging current to the rechargeable battery system is not limited; and(c) during charging, if the measured system voltage is >
a preset overall voltage, then, the charging current to the rechargeable battery system is limited, then, when the measured system voltage is ≦
the preset second resume voltage, then, the charging current to the rechargeable battery system is not limited; and(d) during charging, if the period of time for the charging current to the rechargeable battery system being limited is >
a preset period of time, then, the charging current to the rechargeable battery system is not limited. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of charging a rechargeable battery system having a plurality of cells and a charging means for charging the rechargeable battery system, comprising
providing a plurality of cells electrically connected to form a rechargeable battery system; -
providing a self-discharge voltage measuring means for continually measuring a self-discharge voltage and a corresponding self-discharging means, both connected in parallel to at least one of a cell in a series circuit, a cell set in a series circuit and a cell pack in a series circuit; providing an over-charge voltage measuring means for continually measuring an over-charge voltage across at least one of a cell in a series circuit, a cell set in a series circuit and a cell pack in a series circuit; providing a charging means connected in series with the rechargeable battery system for charging all of the cells of the rechargeable battery system; providing a system voltage measuring means for continually measuring a system voltage across the charging means; providing a limiting means for limiting the charging of the rechargeable battery system; providing a controlling means for controlling the rechargeable battery system; beginning charging, and; (a) during charging, if the self-discharge voltage measured by any one of the self-discharge voltage measuring means is ≧
a preset self-discharge voltage, then, operate the corresponding self-discharging means until the measured self-discharge voltage is equal to the preset self-discharge voltage, then, stop operating the corresponding self-discharging means; and(b) during charging, if any of the measured over-charge voltages is >
a preset overcharge voltage, then, limit the charging current to the rechargeable battery system, then, when all the measured over-charge voltages are ≦
a preset first resume voltage, then, stop limiting the charging current to the rechargeable battery system; and(c) during charging, if the measured system voltage is >
a preset overall voltage, then, limit the charging current to the rechargeable battery system, then, when the measured system voltage is ≦
the preset second resume voltage, then, stop limiting the charging current to the rechargeable battery system; and(d) during charging, if the period of time for the charging current to the rechargeable battery system being limited is >
a preset period of time, then, stop limiting the charging current to the rechargeable battery system. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification