78results about "Safety/protection circuits" patented technology

A system for pre-charging short circuit detection in electric aircraft. The system includes a charging connector and a controller communicatively connected to the charging connector. The charging connector includes a housing, at least a conductor, and at least a control signal conductor. The housing is configured to mate with an electric aircraft port of an electric aircraft. The at least a conductor is configured to conduct a charging current to the electric aircraft. The at least a control signal conductor is configured to conduct a control signal. The controller is configured to receive a circuit health datum, through the at least a control signal conductor, prior to initiation of charging of the electric aircraft, and to disable initiation of charging of the electric aircraft if the circuit health datum comprises a short circuit datum. A method for pre-charging short circuit detection in electric aircraft is also provided.

A battery control circuit with a novel structure, a battery protection circuit with a novel structure, and a power storage device including either of the battery circuits are provided. The power storage device includes a first circuit portion, a second circuit portion, a third circuit portion, and a secondary battery; the first circuit portion has a function of controlling charging of the secondary battery; the first circuit portion has a function of supplying the start time and the end time of the charging of the secondary battery to the third circuit portion; the second circuit portion has functions of generating a first voltage and a first current and supplying them to the third circuit portion; the third circuit portion has a function of generating a second voltage by charging the first current in a capacitor; and the third circuit portion has a function of comparing the first voltage and the second voltage.

Process for controlling a battery including energy storage cells, a controlling device, a sensor for detecting mechanical parameter or electrical parameter, a safety device, an interface for connecting the battery to an external device and electrical wiring. The process includes detecting parameter and eliminating the provision of electric energy from the energy storage cells, if a detected parameter reaches a predetermined threshold value. Battery including a energy storage cell, a controlling device, a sensor for detecting mechanical parameter or electrical parameter, an interface for connecting the battery to an external device, electrical wiring for transmitting electric energy between the at least one battery cell and the external device. The battery includes a safety device for eliminating the provision of electric energy from the energy storage cells, if a parameter detected by the sensor reaches a predetermined threshold value. System including a battery and an external device connectable to the battery.

Described herein is an electric vehicle charging arrangement for charging an electric vehicle. The electric vehicle charging arrangement includes: an electric vehicle charger configured for providing a direct current (DC) to the electric vehicle, a power cabinet configured for providing a DC to the electric vehicle charger, and a direct current bus arranged between the power cabinet and the electric vehicle charger and configured to transport the DC from the power cabinet to the electric vehicle charger, where a capacitive filter is installed on the DC bus and in the electric vehicle charger.

A method for discharging at least one battery cell of a battery for a motor vehicle in the event of at least one specific detected fault concerning the battery. The specific fault is detected and, depending on the detection of the fault, an emergency discharge process for at least partially discharging the at least a battery cell is initiated. In doing so, the at least one battery cell is at least partially discharged during the emergency discharge process via at least one on-board electrical consumer of the motor vehicle external to the battery and / or a power supply system external to the motor vehicle.

A battery-powered electric lawn mower includes battery packs mounted on a docking stations of a bus bar by way of a gravity-biased engagement. The lawn mower also includes a priority charging control logic for giving priority of charge to battery packs that have a state of charge over a threshold. The lawn mower also includes a live to drive system which alerts the user when the lawn mower is capable of moving in response to manipulation of controls. The lawn mower also includes a variable speed control which adjusts a sensitivity of speed controls such that more precise, slower speed control of the lawn mower is achieved when mowing around trees and the like.

A vehicle includes a chassis, a tractive element coupled to the chassis, a cab coupled to the chassis and configured to support an operator, a body coupled to the chassis and offset longitudinally rearward from the cab, such that a volume is defined between the cab and the body, an electric motor configured to drive the tractive element to propel the vehicle, a secondary electrical load, a battery configured to supply electrical energy, and a power distribution unit configured to direct the electrical energy from the battery to the electric motor and the secondary electrical load. The power distribution unit is positioned in the volume defined between the cab and the body.

In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.

Embodiments of this application provide charging apparatuses, charging apparatus control methods, and charging systems, and relate to the field of terminal device charging technologies. The charging apparatus includes a rectifier circuit, a transformer, a lower bridge switch, a clamp capacitor, an upper bridge switch, and a controller. The transformer includes a primary coil and at least one secondary coil. The controller is configured to control the upper bridge switch and the lower bridge switch to be alternatively turned on. The controller is further configured to obtain a sampling waveform at a location at which the controller is electrically connected to the transformer when the lower bridge switch is turned off, and, when the sampling waveform is abnormal, turn off the lower bridge switch in a first phase of a next charging cycle. The sampling waveform includes a voltage waveform of the primary coil or a voltage waveform of the secondary coil.

A power regulation unit is provided for regulating power to or from a power tool battery pack. The power regulation unit includes power regulation circuitry and a controller. The power regulation circuitry is configured to regulate a received power. The controller is connected to the power regulation circuitry. The controller is configured to receive input power from one or more battery cells, regulate the input power by performing at least one of a voltage regulation and a current regulation, and output a regulated output power. For voltage regulation, the regulated output power includes a constant voltage regardless of an operating current of the power tool. For current regulation, the regulated output power includes a constant voltage up to a predetermined current threshold.

A display device according to an embodiment of the present disclosure may comprise a stand and a head supported by the stand, including a display and a battery, wherein the head is electrically connected through a pogo pin provided in a connector of the stand, wherein the head further comprises a main board configured to obtain an operating state of the head and an input voltage input to the head through the pogo pin, and determine whether an error has occurred in the pogo pin based on the operating state of the head and the input voltage.

A control system for charging an aircraft, comprising: a battery pack, an input device configured to enable a user to select between different charging modes, two main contactors connecting the battery pack to an electric propulsion unit (EPU) load and an auxiliary load, a EPU load contactor connecting the battery pack to the EPU load and a controller configured to receive the selected charge mode and control the contactors, keep the two main contactors open upon receiving a user selection to charge in a first mode, close the two main contactors and keep an EPU load contactor open upon receiving a user selection to charge in a second mode, and close the two main contactors and the EPU load contactor upon receiving a user selection to charge in a third mode.

A low voltage system of a vehicle having a battery, one of a generator and an accessory power module (APM), one or more low voltage load, and a smart energy center. The smart energy center having a first electronic fuse configured to selectively connect the smart energy center to the battery, a second electronic fuse configured to selectively connect the smart energy center to the one of the generator and the APM, and a third electronic fuse configured to selectively connect the smart energy center to the one or more low voltage load. The smart energy center further comprising a plurality of sensors and a controller configured to selectively activate and deactivate the first electronic fuse, the second electronic fuse, and the third electronic fuse based at least in part on data received from the plurality of sensors.

A vehicle-mounted charger fault rapid protection system, comprising a PFC power circuit, a high-voltage bus capacitor, a bridge-type isolation conversion power circuit, a PFC controller and a bridge-type circuit controller. The PFC power circuit is separately connected to the high-voltage bus capacitor and the PFC controller. The bridge-type isolation conversion power circuit is separately connected to the high-voltage bus capacitor and the bridge-type circuit controller. The bridge-type circuit controller is connected to the PFC controller by means of a hardwired channel. The PFC controller judges, according to a sampled signal, whether the PFC power circuit has an abnormal state causing circuit failure, and if so, outputs a fault protection signal and inputs the fault protection signal into the bridge-type circuit controller by means of the hardwired channel. The bridge-type circuit controller stops output of the bridge-type isolation conversion power circuit when detecting the fault protection signal output by the PFC controller. Also provided are a method and a vehicle adopting the protection system. By adopting the system, rapid protection can be carried out when a fault occurs in a charger.

One aspect of the present disclosure is a battery pack that supplies electric power to an electric work machine, comprising a first battery-signal terminal and a second battery-signal terminal. The first battery-signal terminal outputs, to the electric work machine, a first signal indicating that discharging is to be prohibited or permitted. The second battery-signal terminal outputs, to the electric work machine, a second signal indicating that discharging is to be prohibited or permitted.

A battery system management device includes at least one processor, and a memory that stores at least one command executed through the at least one processor. The at least one command includes: a command to define an equivalent model for a battery system having a predefined connecting structure including a plurality of batteries and at least one protection element; a command to calculate a short-circuit current generated in the battery system when a short circuit is generated at a location in the battery system using the equivalent model; a command to compare the calculated short-circuit current with a limiting current of the protection element; and a command to determine the number of batteries provided in the battery system based on the result of comparison.

Disclosed is a negative pressure suction-based fixing device comprising a housing, a suction and holding member, a negative pressure creating assembly, a solar panel and a battery; wherein, the housing may have an accommodating cavity thereinside; the suction and holding member may be suctioned onto a suction surface; an end of the suction and holding member away from the housing may be provided with a suction cavity that is in communication with the accommodating cavity; the suction cavity may cooperate with the suction surface to form an enclosed space; the negative pressure creating assembly may be configured to generate negative pressure in the accommodating cavity to create negative pressure in the enclosed space; the solar panel may be disposed on the housing. In this way, the negative pressure suction-based fixing device can continuously supply power to the battery through the solar panel.

Power control device (10), comprising: a first smoothing capacitor (30) configured to smooth the output of a high-voltage battery (1) of a vehicle; a boost converter (40) configured to boost a voltage smoothed by the first smoothing capacitor (30); a second smoothing capacitor (50) configured to smooth the output of the boost converter (40); an inverter unit (60) to which a voltage smoothed by the second smoothing capacitor (50) is input; a gate control unit (80) configured to perform a discharge operation to discharge the first smoothing capacitor (30) and the second smoothing capacitor (50); a backup power supply unit (70A, 70B) connected to the first smoothing capacitor (30) or the second smoothing capacitor (50) and configured to supply power to the gate control unit (80); and an output voltage switching unit (100) configured to adjust the voltage of the backup power supply unit (70A, 70B) during normal operation to be equal to or lower than a voltage supplied to the gate control unit (80) from an auxiliary battery (3), and to switch the voltage of the backup power supply unit (70A, 70B) during discharge operation by the gate control unit (80) to be equal to or higher than the voltage supplied from the auxiliary battery (3).

A protective interconnection circuit for interconnecting a solar panel, a battery and a charge controller. One embodiment has a pair of post-mate, mating electrical connectors. The connectors have at least two primary conduction paths through the joined connectors and a first set of at least two auxiliary conduction paths through the joined connectors. The primary conduction paths electrically connect the battery to the charge controller. The auxiliary conduction paths of the battery side connector are connected together. The auxiliary conduction paths of the controller side connector are connected one to the solar panel and the other to the charge controller. Another embodiment has a relay with its coil terminals electrically connected the controller's battery terminals. The relay contacts are interposed in a conductive connection between the solar panel and the controller.

An embodiment battery pack includes battery modules each including a plurality of battery cells stacked and connected in parallel, the battery modules being arranged adjacent to each other, a housing fixedly surrounding the battery modules, and an auxiliary rigid plate disposed between the battery modules so as to face side surfaces of the battery modules, the auxiliary rigid plate being coupled to the housing and defining a unitary rigid body together with the housing.

The present invention generally relates to automatic charging systems and methods for mobile devices that require more power than is possible with inductive chargers. A mobile device charging station is provided, wherein each mobile device inserted for charging contains a charging receiver that is attached to a cover, such as a laptop cover. The cabinet further comprises a multiplicity of base stations, each of which provides a grid of conductive alternating polarity connection plates, spaced to accept two prongs similarly spaced on the bottom of the charging receiver. Power flows from the base station automatically through the charging receiver to the mobile device when it is placed on a surface containing a base station within the cabinet. Computer software is included to control and monitor all functionality of the system, such a optimal power flow and battery charging; and further provides key asset management tools to allow a user to know, for example, the number and exact location of all devices using the invention and under his or her control.

A jumper cable device includes an input to be connected with an startup power source, two clamps to be connected to a battery of a load, a main controller, a clamp polarity detection module, a forced mode feedback module and a clamp connection module; the main controller is connected to the clamp polarity detection module and the clamp connection module, the clamp polarity detection module and the clamp connection module are further connected to the two clamps, and the forced mode feedback module is connected to the main controller and the two clamps; wherein when a voltage of the battery of the load is lower than a detection threshold, the forced mode feedback module is operated to forcibly connect the circuits between the input and the two clamps, thereby switching on the circuit to the battery.

A neck fan includes a hanging main body and a first fan assembly. The hanging main body includes an inner end portion that is in contact with the neck of a user. The first fan assembly includes a straight-tube-shaped first fan shell. The first fan shell is connected to a lower end portion of the hanging main body; the first fan shell is provided with a third air inlet and a third air outlet; and the first fan assembly is configured to drive air flow to be blown from the third air inlet towards the inner end portion via the third air outlet.

After a charger establishes a connection to an electronic device according to a first charging protocol, a charging circuit of the electronic device receives, in a first time period under the first charging protocol, a first power signal output by the charger, where the first power signal has a first electrical parameter; and receives, in a second time period under the first charging protocol, a second power signal output by the charger, where the second power signal has a second electrical parameter. The second electrical parameter is greater than the first electrical parameter, and the second time period is after the first time period and is adjacent to the first time period. Therefore, in a current or voltage rise phase, a current or voltage rise speed can be increased, thereby increasing the charging speed.

A charging system includes a controller configured to perform charging control of a battery in such a manner that an estimated SOC value of the battery does not exceed an upper limit SOC. The controller is configured to set the upper limit SOC to a first SOC value, for the battery not having been swollen, and set the upper limit SOC to a second SOC value lower than the first SOC value, for the battery having been swollen. In response to a determination that the battery has been swollen and an SOC estimation error is large, the controller is configured to cause an SOC of the battery to be higher than the second SOC value, and determine a correction parameter for correcting the SOC estimation error.

An electrically powered vehicle may include a DC bus and a plurality of batteries, each coupled in parallel to the DC bus. At least one switch is coupled in series between at least one battery of the plurality of batteries and the DC bus and a plurality of inverter circuits may each be coupled in parallel to the DC bus. A plurality of motors may each be coupled to a respective inverter circuit of the plurality of inverter circuits. In various embodiments, the electrically powered vehicle may further include a plurality of switches, each switch coupled in series between a respective battery of the plurality of batteries.

The present invention is proposed to improve a conventional two-pin charging device (dumb charger), which stops charging when the battery is fully charged and can avoid the inrush current at any charging stage. A novel intelligent securely charging system is proposed, which includes a control module for controlling the operation of the system, a power conversion module for converting the input AC power ACin into the electricity required by the system, a switch module for passing or interrupting electrical power transformation, and a pre-charging module with impedance higher than the switch module used for limiting the inrush current, and a voltage detection module which detects the battery voltage Vb, the charging voltage Va. Further, the pre-charging module maintains in the on-state at any charging stage, and the switching module is configured to be in the on-state or off-state according to the application of the charging stage.

A battery pack is provided that supplies power to a device to be connected, comprising: a power output circuit configured to output a first power when an operation status of the battery pack is normal, and to output a second power when an operation status of the battery pack is abnormal, wherein: the first power is power for operating the device, and the second power is power having a magnitude that the device does not operate.

To ensure safety against leakage currents to a human body through a simple configuration. A protective circuit configured to connect: a positive contact electrode terminal, a first negative contact electrode terminal, and a second negative contact electrode terminal, exposed to the outside in a connector section connected to a device including a secondary battery;and a positive electrode terminal and a ground terminal provided in a power output unit configured to output power supplied to the secondary battery via the positive contact electrode terminal, the first negative contact electrode terminal, and the second negative contact electrode terminal, the protection circuit including: a p-type metal-oxide-semiconductor field-effect transistor (MOSFET) connected between the positive contact electrode terminal and the positive electrode terminal; a first electrical path configured to connect the positive contact electrode terminal and a drain terminal of the p-type MOSFET; a second electrical path configured to connect the positive electrode terminal and a source terminal of the p-type MOSFET;a third electrical path configured to connect the second electrical path and the first negative contact electrode terminal via a resistor; a fourth electrical path configured to connect a gate terminal of the p-type MOSFET between the first negative contact electrode terminal and the resistor of the third electrical path; and a fifth electrical path configured to connect the second negative contact electrode terminal and the ground terminal.