Abstract: A lithium-ion battery protection module is disclosed. The lithium-ion battery protection module includes a control IC chip. The control IC chip includes a discharge overcurrent detector, a charge overcurrent detector, and a temperature detector. The control IC chip is mounted on a charge control FET and a discharge control FET so as to highly accurately detect the temperature of the charge control FET and the discharge control FET.

Abstract: A battery protection circuit includes an abnormal condition detection circuit having a resistor through which a current flows from a load in response to a current flowing in the load. The resistor generates a voltage in response to the current flowing in the load. The battery protection circuit further includes a control circuit having a detection stop switch configured to control the current flowing in the resistor from the load. The control circuit turns off the detection stop switch and a protection switch connected between the battery and the load when the abnormal condition detection circuit detects the abnormal condition according to the voltage generated by the resistor. The control circuit returns the detection stop switch to an ON state after returning the protection switch to an ON state in response to a start of supplying power from the battery to the battery protection circuit.

Abstract: A semiconductor device having a positive side of a power supply voltage set as a common potential is disclosed. The semiconductor device includes a power supply circuit that generates a power supply having a negative potential side set to a predetermined voltage based on the common potential. In the semiconductor device, a constant voltage is generated between the common potential and an output voltage of the power supply circuit.

Abstract: A battery protection device protects a battery from an abnormal state. The battery protection device includes a detector that detects an abnormality of the battery and outputs an abnormality detection signal when the abnormality is detected. A current is input to an input terminal from outside. A voltage converter converts the current input to the input terminal to voltage and outputs the voltage. A combiner combines the abnormality detection signal with the voltage and outputs a combined signal. A current converter converts the combined signal to a current. An output terminal outputs the current.

Abstract: A battery protection method is disclosed for protecting a battery from an over-discharge state by switching off a switching element provided between the battery and a load in accordance with the voltage of the battery. The method includes the steps of detecting application of a charging voltage and arranging a chargeable state for the battery by switching on the switching element when the application of the charging voltage is detected.

Abstract: The present invention provides an overcharge/overdischarge detection apparatus includes a detection terminal being in an open state, a detection part for detecting application of voltage to the detection terminal, a switch part for switchably connecting and disconnecting a secondary battery with an external circuit, and a control part for controlling the switch part in a case where the detection part detects the application of voltage to the detection terminal.

Abstract: A battery protection method is disclosed for protecting a battery from an over-discharge state by switching off a switching element provided between the battery and a load in accordance with the voltage of the battery. The method includes the steps of detecting application of a charging voltage and arranging a chargeable state for the battery by switching on the switching element when the application of the charging voltage is detected.

Abstract: A battery protection circuit includes an abnormal condition detection circuit having a resistor through which a current flows from a load in response to a current flowing in the load. The resistor generates a voltage in response to the current flowing in the load. The battery protection circuit further includes a control circuit having a detection stop switch configured to control the current flowing in the resistor from the load. The control circuit turns off the detection stop switch and a protection switch connected between the battery and the load when the abnormal condition detection circuit detects the abnormal condition according to the voltage generated by the resistor. The control circuit returns the detection stop switch to an ON state after returning the protection switch to an ON state in response to a start of supplying power from the battery to the battery protection circuit.

Abstract: A semiconductor device having a positive side of a power supply voltage set as a common potential is disclosed. The semiconductor device includes a power supply circuit that generates a power supply having a negative potential side set to a predetermined voltage based on the common potential. In the semiconductor device, a constant voltage is generated between the common potential and an output voltage of the power supply circuit.

Abstract: A lithium-ion battery protection module is disclosed. The lithium-ion battery protection module includes a control IC chip. The control IC chip includes a discharge overcurrent detector, a charge overcurrent detector, and a temperature detector. The control IC chip is mounted on a charge control FET and a discharge control FET so as to highly accurately detect the temperature of the charge control FET and the discharge control FET.

Abstract: The present invention provides an overcharge/overdischarge detection apparatus includes a detection terminal being in an open state, a detection part for detecting application of voltage to the detection terminal, a switch part for switchably connecting and disconnecting a secondary battery with an external circuit, and a control part for controlling the switch part in a case where the detection part detects the application of voltage to the detection terminal.

Abstract: A battery protection device protects a battery from an abnormal state. The battery protection device includes a detector that detects an abnormality of the battery and outputs an abnormality detection signal when the abnormality is detected. A current is input to an input terminal from outside. A voltage converter converts the current input to the input terminal to voltage and outputs the voltage. A combiner combines the abnormality detection signal with the voltage and outputs a combined signal. A current converter converts the combined signal to a current. An output terminal outputs the current.