A vehicle includes an electric power converter, a power source, a detection circuit, at least one processor, and at least one memory. The electric power converter filters voltage ripple generated by the electric power converter. The detection circuit determines an unfiltered measurement of the power source and a filtered measurement of the power source and generates a differential signal by comparing the unfiltered measurement and the filtered measurement. Said memory stores instructions executable by said processor. The instructions causes said processor to determine a state of health of the power source based at least in part on the differential signal.

A vehicle includes an electric power converter, a power source, a detection circuit, at least one processor, and at least one memory. The electric power converter filters voltage ripple generated by the electric power converter. The detection circuit determines an unfiltered measurement of the power source and a filtered measurement of the power source and generates a differential signal by comparing the unfiltered measurement and the filtered measurement. Said memory stores instructions executable by said processor. The instructions causes said processor to determine a state of health of the power source based at least in part on the differential signal.

A battery charger and method is disclosed for detecting when a battery has a low state of health while simultaneously charging or maintaining the battery. A battery charger includes a processor; a non-transitory memory device; a power management device to receive an input power and to output a charging current; a pair of electrical conductors to electrically couple with a battery, and a display electrically coupled to the processor. The display being configured to indicate a bad battery indicator when the battery has a low state of health and whether the battery is good to start.

An estimation device includes: a derivation unit (31) configured to derive a derivation history based on a current, a voltage of a lead-acid battery and a temperature of the lead-acid battery; a specifying unit (31) configured to specify one or more physical quantities based on the derivation history, and one or more relationships selected from a first relationship between a first history and an amount of positive active material, a second relationship between a second history and a specific surface area of a positive electrode material, a third relationship between a third history and bulk density of the positive active material, a fourth relationship between a fourth history and positive active material particles in a cluster size, a fifth relationship between a fifth history and a cumulative amount of lead sulfate of a negative electrode material, a sixth relationship between a sixth history and a specific surface area of the negative electrode material, a seventh relationship between a seventh history and a corrosion amount of a positive electrode grid, an eighth relationship between an eighth history and resistivity of a positive electrode plate, and a ninth relationship between a ninth history and resistivity of a negative electrode plate; and an estimation unit (31) configured to estimate a degree of deterioration of the lead-acid battery.

A lead-acid battery has a plurality of individual cells and a plurality of measurement circuits which are mounted on the respective individual cells in a manner integrated in the lead-acid battery. Each measurement circuit is designed to measure a respective individual cell voltage. A method is provided for measuring individual cell voltages of the lead-acid battery having the plurality of measurement circuits integrated in the battery and arranged on the individual cells. In the method, the respective individual cell voltages are measured using the measurement circuits.

A lead-acid battery has a plurality of individual cells and a plurality of measurement circuits which are mounted on the respective individual cells in a manner integrated in the lead-acid battery. Each measurement circuit is designed to measure a respective individual cell voltage. A method is provided for measuring individual cell voltages of the lead-acid battery having the plurality of measurement circuits integrated in the battery and arranged on the individual cells. In the method, the respective individual cell voltages are measured using the measurement circuits.

A computer-implemented method including: receiving a set of data from a battery, the set of data including battery voltage and current data obtained over a period of time; preparing a plurality of subsets of the set of data, wherein each subset corresponds to a subperiod of the period of time; determining a state of health of the battery versus time by fitting a battery model to the subsets, where the parameters of the battery model include a state of charge of the battery at a particular point of time in each subperiod and the state of health, wherein the time dependence of the state of health is controlled thereby limiting the magnitude of the temporal rate of change of the state of health; and providing an alert in response to the state of health meeting a particular criterion.

A battery charger and method is disclosed for detecting when a battery has a low state of health while simultaneously charging or maintaining the battery. A battery charger includes a processor; a non-transitory memory device; a power management device to receive an input power and to output a charging current; a pair of electrical conductors to electrically couple with a battery, and a display electrically coupled to the processor. The display being configured to indicate a bad battery indicator when the battery has a low state of health and whether the battery is good to start.

A system of diagnosing vehicle component health. One example includes a component of a vehicle installed within a vehicle, and a sensor coupled to the component of the vehicle. The sensor is configured to obtain operational data and output a signal including the operational data. The system also includes a communication device configured to receive the signal and wirelessly transmit the operational data to an electronic processor located on a server external to the vehicle. The electronic processor is configured to analyze the operational data via a machine learning algorithm, generate a state-of-health of the component, and in response to the generated state-of-health, transmit, from the electronic processor to an external device, the state-of-health of the component.

The present disclosure relates to apparatuses and methods of providing an ideal diode function to a battery having a protective field effect transistor (FET). An apparatus may include the protective FET configured to selectively connect an external voltage to a battery for charging the battery. The apparatus may also include a controller coupled with a gate of the protective FET via a node and configured to enable the protective FET. The apparatus may further include an override circuit coupled to the node and configured to selectively draw current away from the gate of the protective FET based on the external voltage or to interrupt the path from a controller to a protective FET. The override circuit of the apparatus may provide protection from cross-charging of the battery by a second battery while using the protective FET that is already used for charge/discharge protection.