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.

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.

Provided are a battery state measuring method and battery management system, which predict a time point when charging capacity of a battery is to be relatively abruptly reduced. The battery state measuring method includes: monitoring a change of at least one precursor related to the charging capacity of the battery with respect to a number of charging cycles undergone by the battery; and predicting that an abrupt reduction in the charging capacity of the battery is imminent when the change of the at least one precursor follows at least one pre-configured pattern of the battery that has undergone a critical number of charging cycles.

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 system of charging a battery pack with single charger includes a battery module, a main charging module, and a balance charging module. The battery module has a battery pack, and the battery pack has a plurality of cells in series. The main charging module has a main charger. The balance charging module has a balance charger. All the cells of the battery pack of the battery module are charged at the same time by the main charger of the main charging module. After the charging task of the main charging module is completed, the cells of the battery pack of the battery module are charged in sequence by the balance charger of the balance charging module.

A method of estimating the remaining driving distance available from a current charge of a battery of an electrically powered mobility device, wherein the method comprises: a) determining a state of charge of the battery based on a measured battery-related parameter, b) determining a state of health of the battery based on the state of charge, and c) estimating the remaining driving distance that the mobility device can travel with the current charge based on the state of charge and the state of health, wherein step b) involves determining the state of health based on actual consumed ampere hours of the battery.

A display unit controller of a work vehicle includes a plurality of high-voltage charging systems, at least one of working equipment or a traveling device being driven by an electric motor, the display unit controller including: a charging/operation determination unit that functions as a detection unit detecting an abnormality for each of the charging systems and functions as a determination unit determining availability of work or traveling of the work vehicle; and a display control unit varying a charging availability indication indicating presence or absence of the abnormality for each of the charging systems according to the presence or absence of the abnormality for each of the charging systems based on a detection result of the detection unit, and varying an operation availability indication indicating availability of work or traveling according to the availability of work or traveling based on a determination result of the determination unit.

A relay diagnosis apparatus for a parallel pack assembly including a first battery pack having a first battery module and a first positive relay and a second battery pack having a second battery module and a second positive relay includes a diagnosis unit including a diagnosis switch and a diagnosis resistor connected between first and second battery pack terminals, a first detector to detect a current of the first battery module, a second detector to detect a current of the second battery module, and a control unit to collect a first and second detection values from the first and second detectors, respectively, during a first diagnosis period in which the first and second positive relays are open and the diagnosis switch is closed. The control unit determines a stuck-closed fault of the first or second positive relays based on the first and second detection values and a first threshold.

A communication system and method that may reduce the communication load and reduce the waste of system resources consumed for communication. Since a communication packet is generated using a packet structure most suitable for the data size and communication is performed through the generated communication packet, there is an advantage in that the communication load on the communication bus may be significantly reduced. In addition, since the information requesting device allocates a buffer corresponding to the communication packet and stores the communication packet in the allocated buffer, there is an advantage in that the buffer of the information requesting device may be prevented from being wasted.