초록 ▼

A battery monitoring/control device includes a monitor/control device (35) that is operable to be integrated with a microprocessor system. The system includes a CPU (12) that interfaces with a data bus (14) and an address bus (16). The CPU (12) interfaces through a data line (40) with the control/mo

A battery monitoring/control device includes a monitor/control device (35) that is operable to be integrated with a microprocessor system. The system includes a CPU (12) that interfaces with a data bus (14) and an address bus (16). The CPU (12) interfaces through a data line (40) with the control/monitor device (35) and control lines (28) and (34). Commands and data can be input to the control/monitor circuit (35) and data received therefrom. The control/monitor device (35) includes a controller/data register block (36) and a battery charge control/monitor block (44). The device (35) is operable to monitor the battery voltage of a secondary battery (46) during charging thereof and to control the rate of charge through a transistor (66). The battery monitor (90) determines when the voltage on the battery (46) reaches a predetermined level indicating full-charge. A discharge circuit (94) controls a discharge transistor (72) to discharge the battery (46) through a sense resistor (68) for conditioning of the battery. The system receives current from the battery (46) through the resistor (68), the current monitored by a Gas Gauge monitor (92). The Gas Gauge monitor (92) maintains a measurement of the capacity of the battery (46). Control and status information is maintained in control/status register (56), which are set to a default value in a default register (57) upon power up. The CPU (12) can store control information in the registers (56) in order to control the device (35). Further, status information of the device (35) can be stored in the register (56) for access by the CPU (12) through a bus interface (52).

대표청구항 ▼

1. A method for determining the charge state of a battery that is used by a system, which system during operation thereof comprises a system load that can vary in accordance with the operation of the system and which charge state will be charged in accordance with the variable system load and a func

1. A method for determining the charge state of a battery that is used by a system, which system during operation thereof comprises a system load that can vary in accordance with the operation of the system and which charge state will be charged in accordance with the variable system load and a function thereof, comprising the steps of:operating the system with a battery such that the battery load is the system load; determining the amount of charge removed from the battery while under system load and while the battery is discharging, wherein the system load and the current supplied thereto during the operation of the system determine the discharge profile that is a function of the varying system load; initiating the step of determining at a first charge level; terminating the step of determining at a second charge level that is below the first charge level; and defining the capacity of the battery as the amount of charge removed from the battery and delivered to the system load from the step of initiating to the step of terminating and storing the determined capacity in a storage device.