Abstract: A resettable electronic fuse for a high-power device such as a power tool, a battery pack for the power tool, or a battery pack charger. The resettable electronic fuse is connected in a current path of the device and is operable or configured to selectively interrupt current through the resettable electronic fuse based on a detected condition of the device (e.g., a detected fault condition of the device). The resettable electronic fuse is also configured to be reset after a detected fault condition has ended. In some embodiments, the resettable electronic fuse is configured to reset itself. In other embodiments, the resettable electronic fuse is configured to receive a signal (e.g., from a device controller) to reset.

Abstract: A resettable electronic fuse for a high-power device such as a power tool, a battery pack for the power tool, or a battery pack charger. The resettable electronic fuse is connected in a current path of the device and is operable or configured to selectively interrupt current through the resettable electronic fuse based on a detected condition of the device (e.g., a detected fault condition of the device). The resettable electronic fuse is also configured to be reset after a detected fault condition has ended. In some embodiments, the resettable electronic fuse is configured to reset itself. In other embodiments, the resettable electronic fuse is configured to receive a signal (e.g., from a device controller) to reset.

Abstract: A battery pack charging system includes a battery pack interface configured to receive a battery pack, a charging circuit coupled to the battery pack interface to provide charging current to the battery pack interface, and a controller coupled to the charging circuit and configured to control supply of charge current to the battery interface. The battery pack charging system further includes a power supply circuit coupled to the charging circuit, a filter circuit coupled to the power supply circuit and including a nanocrystalline ferrite common mode choke, and an alternating current plug configured to connect the filter circuit to an alternating current power source.

Abstract: A battery pack charger including a housing, a charging circuit, a first charger terminal and a second charger terminal connected to the charging circuit and configured for providing charging power to a battery pack, and a controller. The controller includes a processor and a memory. The controller is configured to charge the battery pack with a constant power charge, switch to a constant voltage charge when a voltage of the battery pack reaches a predetermined threshold, and charge the battery pack with the constant voltage charge.

Abstract: A portable power supply including an internal power source, an AC output, a DC output, and an input unit configured to receive power from a first external source. The portable power supply further includes a first power conversion unit configured to convert the power received from the first external source to a first DC power used for charging the internal power source, an AC power conversion unit configured to convert power output by the internal power source to an AC power used for powering a first peripheral device connected to the AC output, and a DC power conversion unit configured to convert power output by the internal power source to a second DC power used for powering a second peripheral device connected to the DC output.

Abstract: Systems described herein include a battery pack including one or more battery cells and a first resistive element connected to a positive electrode of a first battery cell. The systems also include an external device capable of receiving the battery pack. The external device includes a second resistive element, a switch, and a controller. The second resistive element is configured to be in series with the first resistive element upon the battery pack being received within the external device. The switch is positioned in series with the second resistive element and a common potential is coupled to both the battery pack and the external device. The controller is configured to activate the switch, measure a voltage between the first resistive element and the second resistive element in response to the switch being activated, and determine an identification of the battery pack based on the measured voltage.

Abstract: A portable power supply including a housing, a circuit, a battery power source, and an electronic-ink display. The housing supports a battery power source and a power outlet. The circuit is supported by the housing and includes a power input from the battery power source, a power output on the power outlet, and an inverter electrically connected between the power input and the power output. The battery power source includes a battery cell electrically connectable to the power input. Power is transferrable from the battery cell to the circuit to be output through the power output. The electronic-ink display is configured to display one or more parameters associated with the portable power source.

Abstract: A portable power supply including a first subcore including a first plurality of battery cells, a second subcore including a second plurality battery cells and electrically connected in series with the first subcore, and a controller including an electronic processor. The controller is configured to receive a first voltage value indicative of a voltage of the first plurality of battery cells from the first subcore and a second voltage value indicative of a voltage of the second plurality of battery cells from the second subcore. The controller is further configured to determine a difference between the first voltage value and the second voltage value, compare the difference to a balance threshold, and perform a balancing operation when the difference is greater than or equal to the balance threshold.

Abstract: A battery pack charging system includes a battery pack interface configured to receive a battery pack, a charging circuit coupled to the battery pack interface to provide charging current to the battery pack interface, and a controller coupled to the charging circuit and configured to control supply of charge current to the battery interface. The battery pack charging system further includes a power supply circuit coupled to the charging circuit, a filter circuit coupled to the power supply circuit and including a nanocrystalline ferrite common mode choke, and an alternating current plug configured to connect the filter circuit to an alternating current power source.

Abstract: Disclosed is a system for managing and replacing batteries. In particular, a rapid field tester that pairs via Bluetooth with a smart device, such as a mobile phone. The smart device containing an APP that further interfaces with a remote server to provide management of the battery. A user can test their battery and receive a visual indication if the battery passes or fails predetermined conditions. If the battery fails the test, a replacement battery will be automatically sent to the user. All of the test data is logged through the server and provided to the user in order to facilitate effective battery management.

Abstract: An electronic device includes a housing, a plurality of heat-dissipating fins, and a heat-dissipating fan. The housing defines a receiving space, and an opening communicating the receiving space with the outside environment. The housing includes a power socket disposed in the receiving space. The heat-dissipating fins are disposed in the receiving space. The heat-dissipating fan includes a power plug portion corresponding to the power socket. The heat-dissipating fan is mountable in the receiving space through the opening so as to provide air flow across the heat-dissipating fins. The power plug portion is inserted into the power socket upon insertion of the heat-dissipating fan into the receiving space. The heat-dissipating fan is removable from the housing through the opening for cleaning of the heat-dissipating fan and the heat-dissipating fins.

Abstract: In an assembly of an electronic device and a heat-dissipating module, the electronic device includes an electronic component disposed within a housing provided with an air outlet port, and the heat-dissipating module includes a heat-dissipating fin base disposed within the housing adjacent to the air outlet port, and a dust removing mechanism disposed on the heat-dissipating fin base. The heat-dissipating fin base includes two spaced-apart upright sidewalls, and a plurality of heat-dissipating fins arranged between the upright sidewalls. The dust removing mechanism includes a scraping plate disposed between the upright sidewalls and accessible outwardly of the air outlet port. The scraping plate has scraping teeth extending respectively into clearances among the heat-dissipating fins. By manipulating the scraping plate to displace upwardly and downwardly relative to the heat-dissipating fin base, dust that accumulates among the heat-dissipating fins can be scraped off.

Abstract: In an assembly of an electronic device and a heat-dissipating module, the electronic device includes an electronic component disposed within a housing provided with an air outlet port, and the heat-dissipating module includes a heat-dissipating fin base disposed within the housing adjacent to the air outlet port, and a dust removing mechanism disposed on the heat-dissipating fin base. The heat-dissipating fin base includes two spaced-apart upright sidewalls, and a plurality of heat-dissipating fins arranged between the upright sidewalls. The dust removing mechanism includes a scraping plate disposed between the upright sidewalls and accessible outwardly of the air outlet port. The scraping plate has scraping teeth extending respectively into clearances among the heat-dissipating fins. By manipulating the scraping plate to displace upwardly and downwardly relative to the heat-dissipating fin base, dust that accumulates among the heat-dissipating fins can be scraped off.

Abstract: An electronic device includes a housing, a plurality of heat-dissipating fins, and a heat-dissipating fan. The housing defines a receiving space, and an opening communicating the receiving space with the outside environment. The housing includes a power socket disposed in the receiving space. The heat-dissipating fins are disposed in the receiving space. The heat-dissipating fan includes a power plug portion corresponding to the power socket. The heat-dissipating fan is mountable in the receiving space through the opening so as to provide an air current to the heat-dissipating fins. The power plug portion is inserted into the power socket upon insertion of the heat-dissipating fan into the receiving space. The heat-dissipating fan is removable from the housing through the opening for cleaning of the heat-dissipating fan and the heat-dissipating fins.