A chargeable battery temperature estimation apparatus estimating an internal temperature of a chargeable battery includes a processor performing when executing the instructions stored in a memory: acquiring a detected current value output from a current sensor configured to detect a current flowing in the chargeable battery; calculating a heating value on the basis of the detected current value, the heating value estimating heat generated inside the chargeable battery; acquiring a detected external temperature value output from a temperature sensor configured to detect an external temperature of the chargeable battery; estimating the internal temperature of the chargeable battery based on the calculated heating value and the detected temperature value; and outputting the estimated internal temperature.

A chargeable battery temperature estimation apparatus estimating an internal temperature of a chargeable battery includes a processor performing when executing the instructions stored in a memory: acquiring a detected current value output from a current sensor configured to detect a current flowing in the chargeable battery; calculating a heating value on the basis of the detected current value, the heating value estimating heat generated inside the chargeable battery; acquiring a detected external temperature value output from a temperature sensor configured to detect an external temperature of the chargeable battery; estimating the internal temperature of the chargeable battery based on the calculated heating value and the detected temperature value; and outputting the estimated internal temperature.

A battery testing apparatus includes a battery cycler configured to position a battery cell in a cell pocket defined by a baseplate. The apparatus additionally includes a thermal control device configured to regulate thermal energy in the cell pocket, a baseplate thermistor for detecting baseplate temperature, and thermal control device thermistor for detecting thermal control device temperature. The apparatus also includes a printed circuit board (PCB) in electric communication with the thermal control device thermistor. An electronic microcontroller, in electric communication with the baseplate thermistor and the PCB, is configured to regulate operation of the thermal control device based on data from the baseplate thermistor and the thermal control device thermistor. A main controller, in electronic communication with the microcontroller, is programmed to establish set values for baseplate temperature and battery cell reference current or voltage and regulate electrical input to the battery cell in accordance with the reference values.

A battery testing apparatus includes a battery cycler configured to position a battery cell in a cell pocket defined by a baseplate. The apparatus additionally includes a thermal control device configured to regulate thermal energy in the cell pocket, a baseplate thermistor for detecting baseplate temperature, and thermal control device thermistor for detecting thermal control device temperature. The apparatus also includes a printed circuit board (PCB) in electric communication with the thermal control device thermistor. An electronic microcontroller, in electric communication with the baseplate thermistor and the PCB, is configured to regulate operation of the thermal control device based on data from the baseplate thermistor and the thermal control device thermistor. A main controller, in electronic communication with the microcontroller, is programmed to establish set values for baseplate temperature and battery cell reference current or voltage and regulate electrical input to the battery cell in accordance with the reference values.

A battery system including a number of first battery modules each including a number of battery cells, and a number of second battery modules each including a number of battery cells. Each second battery module includes a power electronics unit having a DC/DC converter. The first and second battery modules are connected in series. The first battery modules are connected directly in series and the second battery modules are connected via their power electronics units.

A battery system including a number of first battery modules each including a number of battery cells, and a number of second battery modules each including a number of battery cells. Each second battery module includes a power electronics unit having a DC/DC converter. The first and second battery modules are connected in series. The first battery modules are connected directly in series and the second battery modules are connected via their power electronics units.

A method of detecting a state of charge of a battery, can include: obtaining an open circuit voltage in a present cycle according to an open circuit voltage of a previous cycle, a battery internal resistance of the previous cycle, and a battery capacitance of the previous cycle, where the battery internal resistance and the battery capacitance are updated according to the state of charge of the battery; and determining the state of charge of the battery according to the open circuit voltage in the present cycle.

The invention discloses a system for dynamic management and control of a lithium battery energy storage system and an electronic device. A battery management system (BMS) is configured to read a present operation data stream of each cell. A diagnosis apparatus is configured to extract a key battery parameter of said each cell from the present operation data stream and consistency thereof, compare the key battery parameter with historical data to determine whether a battery module fails, generate a control parameter according to a diagnosis result, and transmit the present operation data stream to an intelligent gateway and the control parameter to the BMS and an energy management system (EMS), to cause the EMS to dynamically change a charging/discharging control parameter for the battery energy storage system according to a present state of the battery energy storage system.

The invention relates to a power management system for supplying backup DC power to peak and/or high current demand battery applications, such as motor starting or an uninterruptible power supply (UPS) used to power a critical load, such as, a data bus or other critical load, after an event, such as loss of primary AC or DC input, during relatively cold ambient temperatures. Two or more heaters can be provided; for example, a low power heater and a high-power heater. In a maintenance mode, the low power heater is used to maintain batteries at a predetermined temperature. In this mode, a battery charger is used to power the low power heater. In a boost mode, after the primary AC or DC input is restored, and battery temperature is too low to back up the critical load, the battery charger supplies power to one or both of the heaters. Since capacity of the battery charger is normally insufficient to heat the batteries to an acceptable operating temperature in a relatively short period of time, a portion of residual power from the batteries is used to boost power to the heaters in order to speed up the time to get each battery of said batteries to its rated operating temperature.

Disclosed is a method for determining a value of the state of energy of a rechargeable battery in a vehicle, the battery being connected to an electric consumer; the method including: determining the state of charge as a measure of the present capacity of the battery; and determining the state of energy as an indication of at least the remaining charge and discharge energy of the battery. The disclosed method further includes: calculating and determining the value of the state of energy based on at least one parameter which is related to the operation of the electric consumer and where the at least one parameter varies depending on a mode for operating the vehicle or electric consumer during charging or discharging of the battery. Also disclosed is an arrangement for determining a value of the state of energy of a rechargeable battery in a vehicle.