A system according to an embodiment includes storage battery modules, each comprising an assembled battery, a first wireless communication module to transmit and receive radio waves based on a BLE standard, and a battery monitoring unit configured to control operation of the first wireless communication module; and a battery management unit comprising second wireless communication modules to transmit and receive radio waves based on the BLE standard and an arithmetic processing device, wherein a first identifier is preset in the first wireless communication module, and when a connection is started, the first wireless communication module in which a value of a second identifier included in an advertising packet transmitted from the second wireless communication module is a value of the first identifier becomes a broadcaster and transmits the advertising packet.

The systems and methods described herein are directed to techniques for improving battery life performance of end devices in resource monitoring systems which transmit data using low-power, wide area network (LPWAN) technologies. Further, the techniques include providing sensor interfaces in the end devices configured to communicate with multiple types of metrology sensors. Additionally, the systems and methods include techniques for reducing the size of a concentrator of a gateway device which receives resource measurement data from end devices. The reduced size of the concentrator results in smaller, more compact gateway devices that consume less energy and reduce heat dissipation experienced in gateway devices. The concentrator may comply with modular interface standards, and include two radios configured for transmitting 1-watt signals. Lastly, the systems and methods include techniques for fully redundant radio architecture within a gateway device, allowing for maximum range and minimizing downtime due to transmission overlap.

A secondary power system is configured to connect to a motor vehicle having a powertrain comprising an engine and a first alternator. The secondary power system includes a second alternator connected to the engine, one or more electro-chemical storage devices coupled to the second alternator and configured to be charged by the alternator, and one or more inverter chargers. The inverter chargers may operate in a first mode to provide AC power to loads on the vehicle or in a second mode to receive alternative power and charge the storage devices. In an embodiment, the secondary power system includes multiple storage devices each comprising at least one electro-chemical storage pack and a logic. The storage devices are interconnected by a junction box. The logics within each storage device may selectively disrupt power flow from the junction box upon detection of an error condition.

A method of controlling charging of a plurality of batteries and an electronic device to which the same is applied are provided. The electronic device includes a housing, a plurality of batteries arranged in the housing, a power management module that controls the plurality of batteries, a plurality of current limiting ICs that limits a maximum intensity of a current flowing into each of the plurality of batteries, and at least one processor operationally connected to the plurality of batteries, the power management module and the plurality of current limiting ICs. The at least one processor may set a total charging current output from the power management module, set an individual charging current flowing into each of the plurality of batteries in proportion to a total capacity of each of the plurality of batteries, and recalculate the individual charging currents when the total charging current changes.

Systems and methods for charging and discharging a plurality of batteries are described herein. In some embodiments, a system includes a battery module, an energy storage system electrically coupled to the battery module, a power source, and a controller. The energy storage system is operable in a first operating state in which energy is transferred from the energy storage system to the battery module to charge the battery module, and a second operating state in which energy is transferred from the battery module to the energy storage system to discharge the battery module. The power source electrically coupled to the energy storage system and is configured to transfer energy from the power source to the energy storage system based on an amount of stored energy in the energy storage system. The controller is operably coupled to the battery module and is configured to monitor and control a charging state of the battery module.

Provided is a method of operating an electrical system including a first battery, a second battery coupled in series with the first battery, and a battery equalizer coupled to the first battery and the second battery and configured to supply an equalizing current to the first battery. The method includes monitoring a level of the equalizing current, determining, based on monitoring of the level of the equalizing current, that the equalizing current is saturated, and reducing a level of current supplied at a positive terminal of the first battery in response to determining that the equalizing current is saturated. The methods may take an action to reduce the demand for current that is supplied by the first battery.

An eco-friendly vehicle using a charging control method improves the wireless charging efficiency and efficiently manages the charge/discharge of a battery of the vehicle. The eco-friendly vehicle includes: a wireless power receiver to wirelessly receive an electric power from an external charging device; a memory to store state information of each of a plurality of battery cells; and a controller to control a charging order of each of the plurality of battery cells by using the state information stored in the memory when an engine of the vehicle is in an off state.

Systems and methods for charging and discharging a plurality of batteries are described herein. In some embodiments, a system includes a battery module, an energy storage system electrically coupled to the battery module, a power source, and a controller. The energy storage system is operable in a first operating state in which energy is transferred from the energy storage system to the battery module to charge the battery module, and a second operating state in which energy is transferred from the battery module to the energy storage system to discharge the battery module. The power source electrically coupled to the energy storage system and is configured to transfer energy from the power source to the energy storage system based on an amount of stored energy in the energy storage system. The controller is operably coupled to the battery module and is configured to monitor and control a charging state of the battery module.

A battery management system having a microcontroller with first and second applications and first and second tables is provided. The first table has a first record with a first encoded channel index and a first battery cell voltage value associated with a first battery cell. The second table has a first record with a first encoded channel index and a first battery cell overvoltage flag associated with the first battery cell. The first application sends the first encoded channel index from the first table to the second application. The second application transitions a contactor to an open operational position, when the first encoded channel index from the first table is not equal to a first predetermined encoded channel index indicating a data misalignment of the first battery cell voltage value and the first battery cell overvoltage flag.

Systems and methods provide intelligent battery charging and balancing. Energy deficits can be forecasted based on historical data and forecasted energy generation. The deficits can be used to determine charging currents over a period of time, and battery cassettes can be charged according to the charging currents to compensate for the forecasted energy deficit. The states of charge of the battery cassettes can be periodically rebalanced. The battery cassettes can be coupled in series and charged and balanced while providing output to a load.