194results about "Safety/protection circuits" patented technology

A refuse vehicle includes a cab, a refuse compartment, a chassis, a high voltage power distribution unit (HVPDU) including a battery, a plurality of cables and a manual service disconnect. The manual service disconnect is accessed via a through hole of a wheel well of the refuse vehicle. The refuse vehicle further includes a platform removably coupled to the chassis and the HVPDU and configured to enclose the high voltage power distribution unit.

Disclosed is a negative pressure suction-based fixing device comprising a housing, a suction and holding member, a negative pressure creating assembly and a sealing member. The housing has an accommodating cavity thereinside. The suction and holding member has an abutting and holding surface recessed to form a suction cavity communicated with the accommodating cavity. The abutting and holding surface has a mounting structure connected to the sealing member, so that the sealing member is arranged on the abutting and holding surface for abutting against the suction surface. The sealing member can be elastically deformed to fit with the suction surface so as form an enclosed space together with the cooperation of the suction cavity and the suction surface. In this way, it is difficult for the negative pressure suction-based fixing device to fall off from a rough surface.

A power tool is provided including a power supply interface receiving a removable battery pack, a brushless direct current (BLDC) motor including a rotor and a stator, and a multi-phase inverter bridge circuit. A controller is provided to output drive signals to the inverter bridge circuit to control flow of current from to the motor, where each drive signal is activated within each corresponding phase of the motor within a conduction band. The controller is configured to control a length of the conduction band at a variable value within a first torque range below a torque threshold and at a substantially constant value within a second torque range above the torque threshold. The torque threshold is greater than approximately 1 Newton-meters and the motor produces a maximum power output of at least approximately 1250 watts at the torque of approximately 1 Newton-meters.

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 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 power source device includes: a secondary battery; a discharging switch connected in series with the secondary battery; a current limiting switch that is connected in parallel with the discharging switch, and is switched to an on state to supply a limited current to a load in a pre-discharging period in which the discharging switch is in an off state; a current detection circuit that detects a current of the secondary battery; and a controlling circuit that controls the discharging switch and the current limiting switch to be turned on or off. The controlling circuit includes a failure diagnosis circuit for the discharging switch, and the failure diagnosis circuit compares a detection current of the secondary battery detected by the current detection circuit with a threshold set to a value larger than the limited current in the pre-discharging period, and when the detection current is larger than the threshold, determines that the discharging switch has an off impossible failure in which the discharging switch cannot be switched off.

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.

A method for measuring an earth resistance in a battery charging system connected to the power grid includes, for each measurement cycle, injecting a first, alternating current, signal between a first, neutral node and a second, earth node, detecting a first voltage signal representing an electrical potential difference between the first and second node, calculating an earth resistance value as a function of the first voltage signal. Further, injecting between the first, neutral node and the second, earth node an information signal representing the calculated earth resistance value. Before the injecting the first alternating current signal: detecting one or more information signals generated by further battery charging systems connected to the power grid; determining the earth resistance value based on the information content of the received information signals; proceeding with steps a) to c) if a number of information signals lower than the pre-set limit value is detected.

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.

An apparatus comprises a power electronic energy conversion system comprising a first energy storage device configured to store DC energy and a first voltage converter configured to convert a second voltage from a remote power supply into a first charging voltage configured to charge the first energy storage device. The apparatus also includes a first controller configured to control the first voltage converter to convert the second voltage into the first charging voltage and to provide the first charging voltage to the first energy storage device during a charging mode of operation and communicate with a second controller located remotely from the power electronic energy conversion system to cause a second charging voltage to be provided to the first energy storage device during the charging mode of operation to rapidly charge the first energy storage device.

A secondary battery protection integrated circuit includes a control circuit configured to set the secondary battery protection integrated circuit to a first state in which a resistor is disconnected from a power supply terminal or a monitor terminal; set the secondary battery protection integrated circuit to a second state in which the monitor terminal is coupled to the power supply terminal through the resistor; and set the secondary battery protection integrated circuit to a third state in which (i) the monitor terminal is coupled to the power supply terminal through the resistor that is set to have a second resistance value and (ii) power consumption of the secondary battery protection integrated circuit is less than that in the first state, when a potential at the monitor terminal becomes higher than a threshold less than a potential at the power supply terminal in the second state.

A through-wall power station outlet kit may include a power inlet box located in an exterior environment and protected with a bubble cover. The power inlet box may include power generation terminals configured for electrical attachment to a power generation device such as an inverter, a generator, and solar panels. On the interior side, a receptacle box may be used with a plurality of power station terminals for electrical connection to a portable power station. A conduit may join the exterior power inlet box to the interior receptacle box such that the conduit is installed within a wall between the exterior and the interior.

A neck fan includes a first fan main body and a second fan main body. The second fan main body connected to the first fan main body. The first fan main body and the second fan main body are configured to blow air towards a user respectively, the first fan main body and the second fan main body are respectively provided with a control switch, and the control switch is configured to control an operation of the first fan main body and / or the second fan main body.

A method, an apparatus, a system and a device for directly charging a battery based on photovoltaic panels are disclose, which belongs to the field of new energy technologies. The method includes firstly adjusting the number of series-connected photovoltaic panels of each photovoltaic panel series branch according to the desired battery charging voltage of the secondary battery, the current number of series-connected photovoltaic panels of each photovoltaic panel series branch and the current maximum power point voltage, to ensure that the maximum power point voltage of each photovoltaic panel series branch can match the desired battery charging voltage.

Provided are a method for charging a traction battery and a battery management system. The method for charging the traction battery is applied to a battery management system, where the method includes: obtaining an SOH of the traction battery; in a charging process of the traction battery, obtaining an SOC of the traction battery; determining an SOC interval value corresponding to discharging or stopping being charged of the traction battery based on the SOH of the traction battery; and when the SOC of the traction battery changes by the SOC interval value, controlling the traction battery to discharge or stop being charged. Through the technical solution, in the charging process of the traction battery, the discharging or the stopping being charged of the traction battery can be controlled to reduce the risk of lithium precipitation in the traction battery and improve the safety performance of the traction battery.

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 pack may include a plurality of battery cells arranged in an array and a plurality of bus bars. Each bus bar of the plurality of bus bars may be configured to electrically couple a pair of battery cells in series by attaching to a positive terminal of a first battery cell and a negative terminal of a second battery cell. Each bus bar of the plurality of bus bars may include at least one bypass structure configured to be electrically coupled to a bypass wire. When the bypass wire is electrically coupled to a pair of bus bars, the bypass wire enables at least one battery cell of the plurality of battery cells to be bypassed.

A power system for driving a direct current electric motor that is controlled by a driving voltage. The power system includes a plurality of cell modules, each cell module having one or more cells and a plurality of connectors for connecting the cell modules to form a configurable battery to generate the driving voltage. The connectors connect the cell modules into configurable clusters. A voltage level controller controls the configuration of the configurable clusters to provide the driving voltage at one of a set of selectable voltage levels, wherein for each voltage level of said set a share of a current drawn from each of the cell modules with respect to a total current drawn from the configurable battery is lower than for each higher voltage level of said set.

A charging control method and a charging control apparatus are provided. The charging control method may be used to control a charging process of a secondary battery in a terminal device. According to the used charging control method, in the charging process, a battery voltage of the secondary battery may reach a voltage value greater than a limited charge voltage, so that a charging speed of the secondary battery may increase. In addition, in this method, overvoltage of the secondary battery is prevented by gradually reducing a current value of a charging current.

USB charging system and method. For example, a USB charging system includes: a first AC-to-DC conversion unit configured to generate a first voltage and a first current; a second AC-to-DC conversion unit configured to generate a second voltage and a second current; a first USB output port corresponding to the first AC-to-DC conversion unit; a second USB output port corresponding to the second AC-to-DC conversion unit; a switch connected to the first AC-to-DC conversion unit and the second AC-to-DC conversion unit; and a control chip connected to the first AC-to-DC conversion unit and the second AC-to-DC conversion unit and configured to open the switch and close the switch; wherein the control chip is further configured to: determine whether the first USB output port is connected to a load device and whether the second USB output port is connected to a load device.

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 power supply device includes a charge-discharge switching element connected in series to a battery module and configured to charge and discharge the battery module, an analog circuit configured to control turning on and off of the charge-discharge switching element, and a digital circuit configured to control the analog circuit. The analog circuit includes an analog-side communication terminal configured to receive, from the digital circuit by communication, an instruction controlling turning on and off of the charge-discharge switching element, and a switch-OFF terminal configured to turn off the charge-discharge switching element. The switch-OFF terminal is different from the analog-side communication terminal. The power supply device further includes a switch-OFF circuit configured to output an OFF signal to turn off the charge-discharge switching element to the switch-OFF terminal in response to a non-operating state of the digital circuit.

An electric power take-off system for mounting to a truck body to complement an existing power-take-off system powered by an internal combustion engine. The system includes a motor, battery, fluid reservoir, pump and a digital sensing unit for sensing at least one of fluid pressure or a fluid flow rate within the fluid delivery conduit. The digital sensing unit also includes an output capability. The system also includes a motor controller in operable communication with the digital sensing unit as well as the motor for instantaneously controlling the rotational speed of the motor. The motor controller in turn limits operation of the motor only to occasions of truck function operation initiated by the system operator.

A method of manufacturing a battery pack including the creation of a support board for enabling conversion of the battery pack from providing a first voltage to providing a second voltage. The support board is created by injection molding about a precut set of power traces for coupling a converting element to a plurality of battery cells. The power traces couple the plurality of battery cells to a set of battery pack terminals. The support board may be mechanically coupled to a battery cell holder.

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 device for generating a virtual neutral point includes a first terminal, a second terminal and a third terminal connectable respectively to a first phase, a second phase and an earth node of a multiphase power grid. A control circuit is connected to the first, second and third terminals and is configured to maintain a constant value of the electrical potential of the third terminal in response to a disturbance signal generated on the third terminal by a low voltage load; the control circuit includes a storage stage and a control stage operatively interposed between the storage stage and the third terminal and configured for drawing energy from the first storage device when the electrical potential of the third terminal falls below a reference value and drawing energy from the second storage device when the electrical potential of the third terminal rises above a reference value.