摘要:
A lithium ion battery and a method of power conservation for the same are provided. A bare cell including an electrode assembly with a plurality of electrodes and a protective circuit are coupled together via the plurality of electrodes. The protective circuit includes a remaining charge control circuit that internally detects a long-term nonuse state of the lithium ion battery and blocks current between the bare cell and the protective circuit when the long-term nonuse state is detected. The method includes: detecting whether the battery is used as a power source for an external instrument; determining and recording a value of an accumulated nonuse time when the lithium ion battery was not used as a power source; and blocking an internal current and converting the battery to a long-term nonuse mode when the value of the accumulated nonuse time is above a value indicative of a predetermined time.
摘要:
An analog switch and a battery pack using the same are provided. The analog switch can compensate for temperature dependence of voltages measured from a battery cell before applying the measured voltages to an analog-to-digital (A/D) converter. In an embodiment of the analog switch, a first diode is coupled in a backward direction from a flying capacitor, which is coupled to the A/D converter, to correspond to a second diode packaged therewith as a single set. The first diode is positioned in a battery cell voltage input path to store battery cell voltage values in the flying capacitor, while the second diode suppresses a temperature-related difference caused by the first diode to voltages measured from the battery cell.
摘要:
A battery pack and a method of sensing a voltage of the battery pack are disclosed. The battery pack has more battery cells than an individual cell voltage sensing unit can sense the voltages of. The additional battery cells are sensed using a multi-cell voltage sensing unit and digital processing.
摘要:
A battery pack is provided. The battery pack includes first battery cells, a second battery cell coupled to one of the first battery cells, a voltage sensing and balancing circuit for measuring voltages of the first battery cells and for maintaining voltage balance between the first battery cells, a controller that includes an analog-to-digital (A/D) converter, and an analog switch for measuring a voltage value of the second battery cell and for transferring the measured voltage value to the A/D converter. The controller is for controlling charging and discharging of the first and second battery cells. The analog switch includes a flying capacitor, a first switch unit for transferring a voltage between the second battery cell and the flying capacitor, a second switch unit for transferring a voltage of the flying capacitor to the A/D converter, and a first diode for protecting a voltage source from a surge current.
摘要:
A battery pack and a charging method for the same. The battery pack automatically regulates the full-charge voltage of a battery according to deterioration of lifespan of the battery. The battery pack includes: a rechargeable battery having a positive electrode and negative electrode; a switching module having a charge switching device and discharge switching device electrically connected to a high-current path of the battery; and a battery management unit electrically connected to the switching module to control the charge switching device and discharge switching device, electrically connected to the battery to measure an open-circuit voltage and a use time of the battery, determining whether the battery is deteriorated with reference to at least one of the open-circuit voltage and the use time of the battery, and setting a full-charge voltage of the battery when the deterioration of the battery is determined.
摘要:
A battery pack and a method of operating the battery pack are disclosed. The battery pack includes a plurality of battery cells and is configured to open a terminal of the battery if an open circuit is detected in a line connecting battery cells.
摘要:
A battery pack and a driving method thereof. The battery pack includes a battery cell; a charge switch and a discharge switch installed in a charge/discharge line of a battery cell; and a microcontroller to sense and store voltages of the battery cell, to compare the voltages of the battery cell before and after the microcontroller is reset, and to controls the charge switch and the discharge switch based on the sensed voltages of the battery cell such that the microcontroller turns off only one of the charge switch and the discharge switch when there is a change between the voltages of the battery cell before and after the microcontroller is reset.
摘要:
A method for charging a rechargeable battery, and a protection circuit for the rechargeable battery. The protection circuit perceives whether the battery is charged or not by sensing the voltage of the bare cell, changes the direct voltage applied between a gate electrode and a source electrode of a charging field effect transistor, which is connected in series between one terminal of the bare cell and one terminal of a charger, and controls the amount of the current flowing from the source electrode of the charging field effect transistor to a drain electrode at a low level, thereby maintaining a low charging rate of the battery.
摘要:
A lithium ion battery and a method of power conservation for the same are provided. A bare cell including an electrode assembly with a plurality of electrodes and a protective circuit are coupled together via the plurality of electrodes. The protective circuit includes a remaining charge control circuit that internally detects a long-term nonuse state of the lithium ion battery and blocks current between the bare cell and the protective circuit when the long-term nonuse state is detected. The method includes: detecting whether the battery is used as a power source for an external instrument; determining and recording a value of an accumulated nonuse time when the lithium ion battery was not used as a power source; and blocking an internal current and converting the battery to a long-term nonuse mode when the value of the accumulated nonuse time is above a value indicative of a predetermined time.