Patent application number | Description | Published |
20080207026 | POWER TOOL, BATTERY PACK, AND METHOD OF OPERATING THE SAME - An electrical combination includes a power tool having a body, a motor supported by the body, a support portion, and a drive mechanism driven by the motor such that the drive mechanism is operable to drive a tool element. The electrical combination also includes a battery operable for coupling to the power tool via the support portion. The battery is electrically connectable with the motor to selectively supply power to the motor. A single latch is positioned on the support portion of the power tool. The single latch is moveable between a locked position to secure the battery to the power tool and an unlocked position to allow removal of the battery from the support portion of the power tool. | 08-28-2008 |
20090031865 | POWER TOOL, BATTERY, CHARGER AND METHOD OF OPERATING THE SAME - A power tool includes a housing assembly having a first housing portion and a second housing portion supported for pivoting movement relative to the first housing portion about a pivot axis. The first housing portion supports a motor. The second housing portion includes a chuck for supporting a tool element. The power tool also includes a gear supported within the housing assembly for rotation relative to at least one of the first and second housing portions about the pivot axis. The gear is operable to transfer drive force from the motor to the tool element. | 02-05-2009 |
20090087729 | LITHIUM-BASED BATTERY PACK FOR A HAND HELD POWER TOOL - A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell. | 04-02-2009 |
20090153101 | METHOD AND SYSTEM FOR CHARGING MULTI-CELL LITHIUM-BASED BATTERIES - A method and system for charging multi-cell lithium-based batteries. In some aspects, a battery charger includes a housing, at least one terminal to electrically connect to a battery pack supported by the housing, and a controller operable to provide a charging current to the battery pack through the at least one terminal. The battery pack includes a plurality of lithium-based battery cells, with each battery cell of the plurality of battery cells having an individual state of charge. The controller is operable to control the charging current being supplied to the battery pack at least in part based on the individual state of charge of at least one battery cell. | 06-18-2009 |
20090160452 | METHOD AND SYSTEM FOR DETERMINING BATTERY CELL VOLTAGE - Embodiments of the invention relate to a method and system of determining over-voltage and under-voltage conditions for cells in a battery pack. The method includes combining the cells in a battery pack into groups, detecting each cell group's voltage, and calculating ratios of cell group voltages to determine over-voltage and under-voltage conditions. | 06-25-2009 |
20090195216 | METHOD AND SYSTEM FOR PROTECTION OF A LITHIUM-BASED MULTICELL BATTERY PACK INCLUDING A HEAT SINK - A system and method for battery protection. In some aspects, a battery pack includes a housing, a cell supported by the housing, a circuit supported by the housing and operable to control a function of the battery pack, and a heat sink in heat transfer relationship with the circuit and operable to dissipate heat from the circuit. | 08-06-2009 |
20090197152 | METHOD AND SYSTEM FOR BATTERY PROTECTION - A method and system for battery protection. In some aspects, a battery pack configured to be interfaced with a power tool includes a housing, a cell, a controller, and a circuit. The circuit is operable to enable the controller to operate when the voltage supplied by the cell to the controller is below an operating voltage threshold of the controller. | 08-06-2009 |
20100148729 | BATTERY PACK - A system and method for battery protection. In some aspects, a battery pack includes a housing, a cell supported by the housing, a circuit supported by the housing and operable to control a function of the battery pack, and a heat sink in heat transfer relationship with the circuit and operable to dissipate heat from the circuit. | 06-17-2010 |
20100167110 | METHOD AND SYSTEM FOR BATTERY PROTECTION - A battery pack. The battery pack includes a housing, a plurality of terminals, a plurality of lithium-based battery cells, and a controller. The plurality of terminals electrically connect to an electrical device. The electrical device is able to support the battery pack. Each of the plurality of battery cells are individually tapped and have an individual state of charge. The plurality of terminals includes a sense terminal. The controller is operable to monitor a characteristic of each of the plurality of battery cells and to communicate the monitored characteristic of each of the plurality of battery cells to the electrical device via the sense terminal. | 07-01-2010 |
20100236807 | BATTERY PACK - An electrical combination including a driver drill capable of producing an average current draw of approximately 20-amps, a circular saw capable of producing an average current draw of approximately 20-amps, and a power tool battery pack operable to supply power to the driver drill and to the circular saw, the battery pack including a plurality of battery cells, the plurality of battery cells each having a lithium-based chemistry. | 09-23-2010 |
20100327815 | BATTERY PACK - A system and method for battery protection. In some aspects, a battery pack includes a housing, a cell supported by the housing, a circuit supported by a flexible circuit board. The circuit is operable to control a function of the battery pack. | 12-30-2010 |
20110114350 | LITHIUM-BASED BATTERY PACK FOR A HAND HELD POWER TOOL - A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell. | 05-19-2011 |
20110214896 | LITHIUM-BASED BATTERY PACK FOR A HAND HELD POWER TOOL - A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell. | 09-08-2011 |
20110215767 | BATTERY PACK - A system and method for battery protection. In some aspects, a battery pack includes a housing, a cell supported by the housing, a circuit supported by a flexible circuit board. The circuit is operable to control a function of the battery pack. | 09-08-2011 |
20110297411 | LITHIUM-BASED BATTERY PACK FOR A HAND HELD POWER TOOL - A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell. | 12-08-2011 |
20120001596 | METHOD AND SYSTEM FOR CHARGING MULTI-CELL LITHIUM-BASED BATTERIES - A method and system for charging multi-cell lithium-based batteries. In some aspects, a battery charger includes a housing, at least one terminal to electrically connect to a battery pack supported by the housing, and a controller operable to provide a charging current to the battery pack through the at least one terminal. The battery pack includes a plurality of lithium-based battery cells, with each battery cell of the plurality of battery cells having an individual state of charge. The controller is operable to control the charging current being supplied to the battery pack at least in part based on the individual state of charge of at least one battery cell. | 01-05-2012 |
20120194136 | BATTERY PACK - An electrical combination including a driver drill capable of producing an average current draw of approximately 20-amps, a circular saw capable of producing an average current draw of approximately 20-amps, and a power tool battery pack operable to supply power to the driver drill and to the circular saw, the battery pack including a plurality of battery cells, the plurality of battery cells each having a lithium-based chemistry. | 08-02-2012 |
20120301764 | LITHIUM-BASED BATTERY PACK FOR A HAND HELD POWER TOOL - A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell. | 11-29-2012 |
20130224527 | BATTERY PACK - A battery pack operable to provide power to a hand-held power tool, the battery pack including a housing connectable to and supportable by the hand-held power tool; a terminal for electrically connecting the battery pack to the hand-held power tool; a cylindrical first battery cell within the housing and defining a first axis; a cylindrical second battery cell within the housing and defining a second axis; and a cylindrical third battery cell within the housing and defining a third axis. The second battery cell and the third battery cell may be arranged with the second axis and the third axis in a common plane, and the first battery cell may be arranged with the first axis non-parallel to the common plane. | 08-29-2013 |
20130224528 | BATTERY PACK - A battery pack including a housing connectable to and supportable by a hand-held power tool; a first battery cell defining a first axis and having opposite first cell ends; a second battery cell defining a second axis and having opposite second cell ends; a third battery cell defining a third axis; and a terminal for electrically connecting the battery pack to the hand-held power tool. The second battery cell and the third battery cell may be arranged with the second axis and the third axis in a common plane, the first battery cell may be arranged with the first axis non-parallel to the common plane and have one remote first cell end. The terminal may be supported on the housing, in the direction of the first axis, between the one first cell end and the common plane and, in a direction of the second axis, between the second cell ends. | 08-29-2013 |
20130241499 | BATTERY PACK - An electrical combination. The electrical combination comprises a battery pack configured to be interfaced with a hand held power tool, a control component, and a semiconducting switch. The transfer of power from the battery pack to the hand held power tool is controlled by the control component and the switch based on one of a battery pack state of charge and a respective state of charge of one of a plurality of battery cells. A discharge current of the battery pack is regulated based on the switch being controlled into one of a first state and a second state by the control component to selectively enable the transfer power from the plurality of battery cells to the hand held power tool. | 09-19-2013 |
20130244070 | METHOD AND SYSTEM FOR BATTERY PROTECTION - An electrical combination. The combination comprises a hand held power tool, a battery pack and a controller. The battery pack includes a battery pack housing connectable to and supportable by the hand held power tool, a plurality of battery cells supported by the battery pack housing, each of the plurality of battery cells having a lithium-based chemistry, being individually tapped and having an individual state of charge. A communication path is provided by a battery pack sense terminal and a power tool sense terminal. The controller is operable to monitor a state of charge of a number of battery cells less than the plurality of battery cells and to generate a signal based on the monitored state of charge of the number of battery cells less than the plurality of battery cells, the signal being operable to control the operation of the hand held power tool. | 09-19-2013 |
20130335012 | METHOD AND SYSTEM FOR CHARGING MULTI-CELL LITHIUM-BASED BATTERY PACKS - A method and system for charging multi-cell lithium-based batteries. In some aspects, a battery charger includes a housing, at least one terminal to electrically connect to a battery pack supported by the housing, and a controller operable to provide a charging current to the battery pack through the at least one terminal. The battery pack includes a plurality of lithium-based battery cells, with each battery cell of the plurality of battery cells having an individual state of charge. The controller is operable to control the charging current being supplied to the battery pack at least in part based on the individual state of charge of at least one battery cell. | 12-19-2013 |
20140041887 | BATTERY PACK - An electrical combination including a power tool and a battery pack. The power tool includes power tool terminals. The battery pack is configured to be interfaced with the power tool. The battery pack includes a battery pack housing, at least three terminals, and a plurality of battery cells. The battery pack terminals include a positive terminal, a negative terminal, and a sense terminal. The at least three terminals are configured to be interfaced with the power tool terminals. The plurality of battery cells are arranged within and supported by the battery pack housing. Each of the battery cells has a lithium-based chemistry and a respective state of charge, and power is transferable between the battery cells and the power tool. A circuit is configured to monitor the battery cells, detect a charge imbalance among the battery cells, and prevent the battery pack from operating when the charge imbalance is detected. | 02-13-2014 |
20140091771 | LITHIUM-BASED BATTERY PACK FOR A HAND HELD POWER TOOL - A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell. | 04-03-2014 |
20140159507 | BATTERY PACK - An electrical combination. The electrical combination comprises a battery pack configured to be interfaced with a hand held power tool, a control component, and a semiconducting switch. The transfer of power from the battery pack to the hand held power tool is controlled by the control component and the switch based on one of a battery pack state of charge and a respective state of charge of one of a plurality of battery cells. A discharge current of the battery pack is regulated based on the switch being controlled into one of a first state and a second state by the control component to selectively enable the transfer power from the plurality of battery cells to the hand held power tool. | 06-12-2014 |