Abstract: An inverter and battery charger system that uses no power magnetic components to convert DC power supply from a plurality of batteries to AC power and achieves very high efficiency and small size. The inverter takes advantage of the different voltages in a series string of batteries to create small voltage steps to approximate a sinewave or other waveforms. By changing the timing where the voltage steps are selected, different frequencies can be obtained. The low frequency operation of the inverter produces little radio frequency interference. The battery charger applies charging current to the various nodes in the series string of battery cells to charge each one as needed to accommodate the differing levels of discharge used to make a sinewave or other waveform.

Abstract: An inverter and battery charger system that uses no power magnetic components to convert DC power supply from a plurality of batteries to AC power and achieves very high efficiency and small size. The inverter takes advantage of the different voltages in a series string of batteries to create small voltage steps to approximate a sinewave or other waveforms. By changing the timing where the voltage steps are selected, different frequencies can be obtained. The low frequency operation of the inverter produces little radio frequency interference. The battery charger applies charging current to the various nodes in the series string of battery cells to charge each one as needed to accommodate the differing levels of discharge used to make a sinewave or other waveform.

Abstract: A battery management system monitors and controls the state of charge of a plurality of battery cells with a single data transceiver line. A sense board coupled to each cell monitors the battery cell voltage and temperature and reports the cell voltage in series, according to the location in series. A data request signal is sent by the control device of the battery management system through the single data transceiver line to initiate battery cell data transmission. The first battery cell in the series sends the first battery data upon receiving the data request signal and each subsequent battery cell in the series sends their respective battery data after a predetermined delay time set by two quaternary bits formed by a pair of voltage dividers. The state of charge may be displayed in real time on a graphical or numerical display.

Abstract: A phase controlled power regulation circuit is isolated from a line voltage and therefore overcomes some of the safety issues associated with currently available potentiometers. A phase controlled power regulation circuit employs a potentiometer that is electrically isolated from mains power. A transformer regulates the line voltage down to a reduced reference voltage that is used by the power regulation circuit. Any single point failure of a component within the power regulation circuit will not create unsafe condition. This greatly simplifies regulatory approval and opens new applications. Since the potentiometer is operated at low voltage, it may be remotely located from the circuits that handle the power with two conductors of class 2 wiring. Also, the potentiometer need not be of a panel mounted rotary or sliding type. It may be a potentiometer integrated circuit controllable from a microprocessor that enables complex regulation and/or sequencing control.

Abstract: An integral battery temperature control system monitors and heats a battery to enable operation in cold environments and utilizes a heating device coupled to one of the terminals of the battery to heat the terminal and thereby heat the electrode coupled thereto. The heated electrode is within the battery housing and internally heats the battery. A temperature sensor measures the temperature of the opposing terminal and a controller will terminate heating when the measured temperature of the opposing terminal rises above an upper threshold temperature value. The heating device be coupled with or be part of a discharge circuit, wherein electrical current from the battery is used to heat the battery. A discharge circuit is part of a battery unit monitoring module that balances the voltage of a plurality of battery units. The heating device may include a resistor or a transistor of the discharge circuit.

Abstract: An automatic rechargeable battery control module for a vehicle, such as a golf cart incorporates an automatic battery control system that automatically switches from charge to discharge modes with a single relay, thereby preventing the need to manually reset a relay switch due to an over or under voltage situation. An automatic battery control circuit is coupled with a battery management system and a relay contactor is opened and closed by a signal from the battery management system. The battery management system monitors a state of charge of the battery unit as well as current flow to and from a battery unit. The automatic rechargeable battery control module may have a state of charge output that is connected with a state of charge indicator to inform a driver of an approximate driving range or time remaining.

Abstract: A battery management system monitors and controls the state of charge of a plurality of battery cells with a single data transceiver line. A sense board coupled to each cell monitors the battery cell voltage and temperature and reports the cell voltage in series, according to the location in series. A data request signal is sent by the control device of the battery management system through the single data transceiver line to initiate battery cell data transmission. The first battery cell in the series sends the first battery data upon receiving the data request signal and each subsequent battery cell in the series sends their respective battery data after a predetermined delay time set by two quaternary bits formed by a pair of voltage dividers. The state of charge may be displayed in real time on a graphical or numerical display.

Abstract: An automatic rechargeable battery control module for a vehicle, such as a golf cart incorporates an automatic battery control system that automatically switches from charge to discharge modes with a single relay, thereby preventing the need to manually reset a relay switch due to an over or under voltage situation. An automatic battery control circuit is coupled with a battery management system and a relay contactor is opened and closed by a signal from the battery management system. The battery management system monitors a state of charge of the battery unit as well as current flow to and from a battery unit. The automatic rechargeable battery control module may have a state of charge output that is connected with a state of charge indicator to inform a driver of an approximate driving range or time remaining.

Abstract: An automatic battery control system automatically switches from charge to discharge modes with a single relay, thereby preventing the need to manually reset a relay switch due to an over or under voltage situation. An automatic battery control circuit is coupled with a battery management system and a relay contactor is opened and closed by a signal from the battery management system. The battery management system monitors a state of charge of the battery unit as well as current flow to and from a battery unit. A parallel resistor is configured across the input and output sides of the single relay contactor and the voltage drop across the resistor indicates a connection to either a charging power source or a load. The connection is communicated to the battery management system by an optocoupler and if the battery unit has an acceptable state of charge, the relay contactor is closed.

Abstract: An automatic rechargeable battery control module incorporates an automatic battery control system that automatically switches from charge to discharge modes with a single relay, thereby preventing the need to manually reset a relay switch due to an over or under voltage situation. The module requires on a single power connection line connected with a single power connector on the module. Both input power to charge the battery and output power flow in and out of the single power connector and through the single power connection line. An automatic battery control circuit is coupled with a battery management system and a relay contactor is opened and closed by a signal from the battery management system. The battery management system monitors a state of charge of the battery unit as well as current flow to and from a battery unit.

Abstract: An integrated battery control system for energy storage incorporates a power control system to reliably provide power to a load and protects lithium ion batteries from over-charging and over-discharging. One or more power sources, such as renewable power sources, such as solar or wind power generators, or a generator, may be coupled with the integrated battery control system to provide power for charging the battery pack and/or for supplying power to said load. A portion of the power from a power source may be used to charge the battery pack and a portion may be provided to a load. A control circuit and one or more microprocessors may control the components of the system to provide power in an efficient manner. Power to and from the battery may run through an inverter and a control system may open and close switches to control flow of power in the system.

Abstract: A portable environment control system is configured to condition the air within an enclosure, such as by heating, cooling, humidifying or dehumidifying. The portable environmental control system has a conduit that is attached at one end to an environment control device and attached at the opposing outlet end to a partition coupling. The partition coupling is configured over an opening in a partition, such as an exterior wall of a recreation vehicle. Airflow from the environment control device is configured to flow through the conduit and through the partition coupling to an enclosure. The portable environment control system is quick and easy to install and allows for closure of an opening in a partition with a flange cover. The portable environment control system may have an inlet and outlet conduit to provide air flow to and draw air flow from an enclosure, respectively.

Abstract: An uninterrupted power supply system incorporates a plurality of lithium batteries as a back-up power supply to an AC power supply. In the event that there is an interruption in the AC power supply, a power output switch is automatically activated by a power control system to draw power from a lithium battery pack. In an embodiment, a battery pack is monitored by a battery management system that is coupled to battery monitoring modules couple to each battery. The battery management system may be configured to monitor the voltage and/or temperature of each battery. In another embodiment, an uninterrupted power supply system comprises a battery unit balancing system that maintains each battery within a battery unit below a threshold voltage value. A charging circuit and discharging circuit are used to maintain the batteries in a ready state of charge when not being used for the output power.

Abstract: A wireless battery management system includes a computing device and first and second battery unit monitoring modules. The computing device includes an output data request port and an input data port. In response to a data request from the output data request port of the computing device, a first battery unit monitoring module transmits data of the first battery unit to the input data port of the computing device wirelessly and may transmits a data request to the second battery unit monitoring module. In response, the second battery unit monitoring module may transmit data of the second battery unit to the input data port of the computing device wirelessly or transmit data of the second battery to the first module for wireless transmission. In addition, each battery unit monitoring module may communicate wirelessly and independently with the computing device.

Abstract: An integrated battery control system incorporates a battery management system and a power control system to reliably and safely provide power to vehicles and other mobile devices. The integrated power control system incorporates safety features to protect the batteries from dropping below a threshold voltage or being overcharged, and from operating the vehicle when it is coupled with an AC power supply. An integrated power control system may be contained in a control enclosure having a computing device, battery power input, an AC power input, a power output switch, a power output, a key-switch interface and a shunt to measure current flow. The power control system regulates electrical power delivery to a drive motor and a pre-charge resistor as a function of the battery state of charge. When a battery unit is below a threshold value, power delivery is disabled to the drive motor and a pre-charge resistor.

Abstract: An integrated battery control system incorporates a battery management system and a power control system to reliably and safely provide power to vehicles and other mobile devices. The integrated power control system incorporates safety features to protect the batteries from dropping below a threshold voltage or being overcharged, and from operating the vehicle when it is coupled with an AC power supply. An integrated power control system may be contained in a control enclosure having a computing device, battery power input, an AC power input, a power output switch, a power output, a key-switch interface and a shunt to measure current flow. The power control system regulates electrical power delivery to a drive motor and a pre-charge resistor as a function of the battery state of charge. When a battery unit is below a threshold value, power delivery is disabled to the drive motor and a pre-charge resistor.

Abstract: A switched capacitor battery monitoring system enables reliable measurement of the battery voltages of a plurality of batteries in a battery unit with a single microprocessor and or analog-to-digital converter. A battery unit having a plurality of batteries may have a switched capacitor battery monitor configured on each battery. Each switched capacitor battery monitor utilizes a capacitor that is charged to substantially the same voltage level as the battery it is attached to. The capacitor is isolated from the battery by a switch and the voltage level of the capacitor is provided to an analog-to-digital convened to measure the voltage level of said battery. This method enables the individual battery voltage to be measured and therefore does not measure the cumulative voltage of two or more batteries connected in series. This method maintains the measured voltage below a voltage threshold of the analog-to-digital converter and microprocessor.

Abstract: A wireless battery management system includes a computing device and first and second battery unit monitoring modules. The computing device includes an output data request port and an input data port. In response to a data request from the output data request port of the computing device, a first battery unit monitoring module transmits data of the first battery unit to the input data port of the computing device wirelessly and may transmits a data request to the second battery unit monitoring module. In response, the second battery unit monitoring module may transmit data of the second battery unit to the input data port of the computing device wirelessly or transmit data of the second battery to the first module for wireless transmission. In addition, each battery unit monitoring module may communicate wirelessly and independently with the computing device.

Abstract: An uninterrupted power supply system incorporates a plurality of lithium batteries as a back-up power supply to an AC power supply. In the event that there is an interruption in the AC power supply, a power output switch is automatically activated by a power control system to draw power from a lithium battery pack. In an embodiment, a battery pack is monitored by a battery management system that is coupled to battery monitoring modules couple to each battery. The battery management system may be configured to monitor the voltage and/or temperature of each battery. In another embodiment, an uninterrupted power supply system comprises a battery unit balancing system that maintains each battery within a battery unit below a threshold voltage value. A charging circuit and discharging circuit are used to maintain the batteries in a ready state of charge when not being used for the output power.