A battery management system (BMS) for a vehicle includes a module for estimating the state of a rechargeable battery, such as its state of charge, in real time. The module includes a learning model for predicting the state of a battery based on the vehicle's usage and related factors unique to the vehicle, in addition to a sensed voltage, current and temperature of a battery.

A battery pack management device capable of reducing power consumption while transmitting and receiving data between a master BMS and a slave BMS by using a wireless communication method. The battery pack management device according to the present disclosure includes: a master BMS including an external communicator, an internal communicator, and a master controller and a slave BMS including a power supply, a state measurement sensor, a slave wireless communicator, and a slave controller.

The present disclosure relates to a method performed by battery charger configured to charge a vehicle battery, the method comprising initiating, at a first point in time (t_Bulk_Start), charging of the battery in a bulk charging mode, determining, at a second point in time (t_Bulk_End) subsequent to the first point in time (t_Bulk_Start), that the charging of the battery in the bulk charging mode is completed, estimating, at the second point in time (t_Bulk_End), a state of charge of the battery at the first point in time (t_Bulk_Start) when the charging of the battery in a bulk charging mode was initiated, initiating charging of the battery in a subsequent charging mode using the estimated state of charge (SoC_Bulk_Start), wherein the subsequent charging mode is selected from an absorption charging mode and a float charging mode.

A power supply system includes: a voltage converter that converts a voltage between first and second power circuits; a power controller that controls charging and discharging of first and second batteries; a cooling output controller that controls cooling output for the second battery; a temperature remaining-capacity acquirer that acquires a temperature remaining-capacity T2_mar; and a cooling remaining-capacity acquirer that acquires a cooling remaining-capacity PC2_mar depending on a difference between maximum cooling output and the cooling output of the second cooler. The power controller is configured to stop the voltage converter in a case where at least one of the temperature remaining-capacity T2_mar and the cooling remaining-capacity PC2_mar is less than an associated one of a threshold value for the temperature remaining-capacity and a threshold value for the cooling remaining-capacity and a potential difference between the first and second batteries is equal to or more than a potential difference threshold value.

A power system for a vehicle includes: a high voltage battery; a low voltage DC-DC converter configured to step down a voltage of the high voltage battery and to output the stepped down voltage; a low voltage battery charged by an output current of the low voltage DC-DC converter, where the low voltage battery includes a first cell group including a plurality of battery cells, and a second cell group connected in parallel with the first cell group and including a plurality of battery cells; and a plurality of switches configured to electrically connect or disconnect the first cell group or the second cell group with the low voltage DC-DC converter, electrical loads configured to receive power from at least one of the low voltage DC-DC converter and the low voltage battery; and a controller configured to control opening or closing of the plurality of switches.

At least some embodiments of the present disclosure are directed to systems and methods for predictive energy management for an electrified powertrain. In some embodiments, the system is configured to: receive a first state-of-charge (SOC) of a high-voltage energy storage system; receive a second SOC of a low-voltage energy storage system; predict an energy recuperation of an electrified powertrain using telematics data; and determine a charging direction of a bidirectional converter based on the predicted energy recuperation, the first SOC, and the second SOC.

Battery management techniques for a vehicle include a set of sensors configured to measure a set of parameters of a battery of the vehicle and a controller configured to control recharging of the battery to a first target state of charge (SOC) corresponding to optimized battery life when a mileage of the vehicle is less than a threshold mileage corresponding to an expected transport period of the vehicle, wherein controlling the recharging of the battery to the first target SOC prevents battery malfunctions and thereby reduces vehicle warranty costs for an original equipment manufacturer (OEM) of the vehicle, and control recharging of the battery to a second target SOC determined by a cost-based optimization technique when the mileage of the vehicle reaches the threshold mileage.

A system for mitigating thermal runaway in a battery-powered electric vehicle (EV). The system includes a gas sensor configured to measure a level of at least one type of gas in a vicinity of a battery of the EV, a thermal event detector configured to determine, based on the measured level of the at least one type of gas, that the battery is experiencing out-gassing, and a communications interface configured to transmit an alert to a fleet management system regarding the out-gassing of the battery. The fleet management system alters an assignment of the EV in response to the out-gassing of the battery.

A vehicle includes a battery, an electric machine, and a controller. The battery has a state of charge. The electric machine is configured to draw electrical power from the battery to propel the vehicle in response to an acceleration request and to deliver electrical power to the battery to recharge the battery. The controller is programmed to adjust an estimation of battery state of charge based on a feed forward control that includes a coulomb counting algorithm, a first feedback control that includes a first battery model, and a second feedback control that includes a second battery model. The controller is further programmed to control the electrical power flow between the battery and the electric machine based on the estimation of the state of charge of the battery.

A controller of a drive system is configured to, when a power switch is changed from an on state to an off state in a situation in which it has been diagnosed that an abnormality is occurring in a motor generator, execute a starting check process of checking a drive circuit and an engine starting process of starting an engine. The starting check process includes a voltage reduction process of driving a DC-DC converter until a capacitor voltage becomes lower than or equal to a prescribed voltage. The controller is configured to, on condition that the controller determines through a voltage reduction determination process that the capacitor voltage is reduced as compared to the capacitor voltage at an end of the voltage reduction process, execute the engine starting process.