A circuit used to measure cell voltages in a battery pack can include a cell voltage level shifter, a sense block, and a compensation current generator. The cell voltage level shifter selects a cell and shifts the terminal voltages of the selected cell from a first voltage level to a second voltage level. The sense block monitors the current consumed by the level shifter, and generates a signal indicative of the consumed current. The compensation current generator generates compensation currents to compensate the current consumed by the level shifter. Therefore, unbalance of the cell capacities caused by the current consumed by the level shifter can be reduced or eliminated, and thus the overall capacity of the battery pack can be improved.

Circuits and methods for measuring cell voltages in battery packs

An electronic device includes a secondary battery having at least one bare cell, the secondary battery including a charge/discharge switching module for placing the secondary battery in one of a charging state for charging the at least one bare cell or a discharging state for discharging the at least one bare cell; and an analog front end for generating an analog signal based on information of the secondary battery and for transmitting the analog signal out of the secondary battery; and a processor external to the secondary battery for receiving the analog signal from the analog front end and for controlling the charge/discharge switching module in accordance with the analog signal.

Charge and discharge system of secondary battery and method of controlling charge and discharge of secondary battery

A semiconductor device includes a power source line connected in series to a plurality of power source supply portions; a semiconductor chip including a first communication circuit connected to a lower stage semiconductor chip, a second communication circuit connected to a higher stage semiconductor chip, and a terminal connected to the second communication circuit; and a connecting line directly connected to the power source line and the terminal of the semiconductor chip without disposing any grounded circuitry element in parallel to the terminal and the power source line.

Semiconductor circuit and semiconductor device

A circuit measures a cell voltage of a cell in a battery. The circuit includes a measurement circuit and a current generator. The measurement circuit includes a first terminal coupled to a positive terminal of a cell via a first resistive element and includes a second terminal coupled to a negative terminal of the cell via a second resistive element. The measurement circuit consumes a first current. The current generator generates a first compensation current according to the first current. The first current and the first compensation current flow from the positive terminal through the first resistive element to the first terminal. The measurement circuit calculates the cell voltage according to a first voltage difference between the first and second terminals when the first compensation current is disabled and according to a second voltage difference between the first and second terminals when the first compensation current is enabled.

Circuits and methods for measuring a cell voltage in a battery

A system may include a plurality of units, wherein each unit has a respective common mode voltage terminal, communication up terminal, and communication down terminal. A first unit of the plurality of units may be configured to generate a first plurality of currents on its communication up terminal, wherein the first plurality of currents corresponds to a first plurality of bits. A second unit of the plurality of units may be configured to receive the first plurality of currents on its respective communication down terminal, and maintain a voltage level at its respective communication down terminal during reception of the first plurality of currents. The voltage level may be equal to a common mode voltage of the respective common mode voltage terminal of the second unit.

Method for communication across voltage domains

A communication circuit is used for transmitting data between a plurality of devices which have non-common ground voltages. The communication circuit comprises a plurality of transmitting input nodes coupled to the devices, respectively, a transmitting current path, a plurality of receiving output nodes coupled to the devices, respectively, and a receiving current path. The transmitting current path is coupled to the transmitting input nodes. The current through the transmitting current path is varied according to the input signal of the transmitting input nodes. The receiving current path is coupled to the receiving output nodes. The current through the receiving current path is varied according to the current of the transmitting current path such that data is transmitted from the transmitting input nodes to the receiving output nodes.

Non-common ground series bus physical layer implementation

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Non-common ground series bus physical layer implementation