A battery management system (BMS) includes at least one sub-BMS and a main BMS. The at least one sub-BMS measures information about a battery, and generates an activation signal according to operating state. The main BMS receives the activation signal and determines the operating state of the at least two sub-BMSs. If the at least two sub-BMSs normally operate, the main BMS generates a synchronization signal and transfers the same to the sub-BMSs. The at least one sub-BMS measures the information about the battery according to the synchronization signal.

Battery management system and driving method thereof

A battery system and method of providing a state of charge of for the system in one embodiment includes at least one first cell, the at least one first cell having a first battery chemistry exhibiting a first open circuit potential, and at least one second cell in series connection with the at least one first cell, the at least one second cell having a second battery chemistry exhibiting a second open circuit potential, wherein the at least one first cell exhibits an open circuit potential with a center slope that is greater than the center slope of the open circuit potential exhibited by the at least one second cell.

Battery system and method for system state of charge determination

A hybrid vehicle includes a control apparatus having an engine controller and a motor controller A first battery and a second battery which has higher voltage than the first battery are provided An electric power generator which is driven by the engine is provided for charging the first battery The second battery and the electric motor are connected through the motor controller, and the first battery or the electric power generator is connected to the motor controller and the engine controller In addition, the first battery or the electric power generator is connected to the engine controller for maintaining a power supply for operation maintenance of the engine controller The second battery and the electric motor are connected through the motor controller The second battery or the electric motor is connected to the motor controller through a DC/DC converter As a result, even if the high voltage line including the electric motor in the control apparatus for the hybrid vehicle has failed, this system can drive the vehicle

Control apparatus for hybrid vehicle

A controller executes local generation and local consumption pathways of: supplying power from a solar cell to an appliance, and charging a storage cell with power that remains after subtracting power consumed by the appliance from the solar cell power. In the absence of excess power, the storage cell and solar cell supply power. Power supply from a commercial electrical grid covers a power shortage that remains after subtracting solar cell power and storage cell power from the power consumed by the appliance. The controller also executes a second excess power selling mode pathway wherein excess power flows into the commercial electrical grid, and an assist mode wherein all solar cell power flows into the commercial electrical grid, and storage cell power flows to the appliance.

Power supply system.

A method, computer-readable medium, system, and apparatus for improving energy transfer with a vehicle are disclosed.

Energy transfer with vehicles

An inductor (L), capacitor (C) and alternator (OSC) are connected in series to the positive and negative poles of a battery (15). The temperature of the battery (15) is increased by causing the alternator (OSC) to generate an alternating current having the resonance frequency of the inductor (L) and capacitor (C). The alternating current is consumed by the internal resistance of the battery (15) due to the resonance of the inductor (L) and capacitor (C), and the temperature of the battery (15) therefore rises due to the heat thereby generated in the battery. In this way, the temperature of the battery (15) can be effectively increased with minimum power consumption.

Battery temperature increasing device and method

A state of charge indicator of a lithium ion battery computes a state of charge (SOC) corresponding to a cell open circuit voltage from a SOC-cell open circuit voltage characteristic map, and displays the SOC on a display device. Herein, the SOC-cell open circuit voltage characteristics are obtained by defining the battery charge amount when the open circuit voltage of the cell is 3.9 V as SOC=100%, and defining the battery charge amount when the open circuit voltage of the cell is 3.5 V as SOC=100%. By defining SOC=100% and SOC=0% in this way, the SOC can be correctly computed and displayed even if the battery has deteriorated.

State of charge indicator

This invention relates to a lithium ion multi-cell battery (15) wherein plural lithium ion cells (Cn) are arranged in series. Each cell comprises a positive electrode of manganese/spinal oxide and a negative electrode. A first Zener diode (Zn 1) and first resistor (Rn 1) are connected in series between the electrodes. By setting the Zener voltage (VZ1) of the first Zener diode (Zn 1) equal to the cell voltage VL of the responding cell (Cn) when positive electrode crystal phase transport stars in that cell (Cn), the charge amount of each cell is made uniform.

Charge controlling device and method for multi-cell battery, and electric vehicle provided with change controlling

PROBLEM TO BE SOLVED: To manufacture a battery within a short manufacturing time without increasing its size. SOLUTION: The electrode structure of this battery is provided with an elongate separator 11, a positive electrode 12 formed on one surface of the separator 11, and a negative electrode 13 formed on the other surface of the separator 11. The separator 11 is formed into and used as an ion conductive film, the positive electrode 12 is provided with a lithium oxide, and the negative electrode 13 is provided with carbon. When the battery is composed by using the electrode structure like this, lithium ions move from the positive electrode 12 to the negative electrode 13 through the separator 11 during discharging, and the lithium ions move from the negative electrode 13 to the positive electrode 12 through the separator 11.

Battery and its manufacture

PROBLEM TO BE SOLVED: To calculate residual usable time in response to a temperature environment and a using state of a battery. SOLUTION: This battery service life deciding device calculates average internal resistance by using an electric current and voltage of a battery 1 detected plural times according to the lapse of time by an electric current detecting part 3 and a voltage detecting part 4 in an operation part 5, measures the elasped time up to reaching the present time after starting use of the battery 1, and determines usable time of the battery by using the detected average internal resistance and the elapsed time on the basis of the correlation between the internal resistance, the elapsed time and usable time predetermined under a condition of setting a temperature environment and a using state constant to calculate residual usable time by subtracting the elapsed time from this usable time.

Kawai Mikio

Papers

Battery temperature increasing device and method

State of charge indicator

Charge controlling device and method for multi-cell battery, and electric vehicle provided with change controlling

Battery and its manufacture

Battery service life deciding device