111results about "Battery overvoltage protection" patented technology

A control switch incorporating a 1:2 demultiplexer is used in controlling timing for concurrent switching, break-before-make and make-before-break power multiplexing, and is configurable to link a plurality of the control switches into a control chain to perform sequential charging, sequential discharging, parallel charging, parallel discharging, simultaneous sequential charging and discharging for a plurality of batteries coupled to the control chain in a power system.

A wireless power transmitter that transmits power to a wireless power receiver, the wireless power transmitter including a communication unit configured to communicate with the wireless power receiver; and a controller, wherein the communication unit receives a plurality of packets including a foreign object detection (FOD) status packet from the wireless power receiver, wherein the controller determines whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet, wherein the communication unit transmits, to the wireless power receiver, a response signal indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, and wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a configuration packet, an identification packet for transmitting receiver identification information, an extended identification packet, a general request packet, a special request packet, a control error packet, a renegotiation packet, a 24-bit received power packet, an eight-bit received power packet, and a charging status packet.

A wireless power receiver that receives power from a wireless power transmitter, the wireless power receiver including a communication unit configured to communicate with the wireless power transmitter; and a main controller, wherein the main controller generates a plurality of packets including a foreign object detection (FOD) status packet, wherein the communication unit transmits the FOD status packet to the wireless power transmitter, and the communication unit receives, from the wireless power transmitter, a response signal indicating whether a foreign object is present in a charging area of the wireless power transmitter, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, and wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a configuration packet, an identification packet for transmitting receiver identification information, an extended identification packet, a general request packet, a special request packet, a control error packet, a renegotiation packet, a 24-bit received power packet, an eight-bit received power packet, and a charging status packet.

Example implementations include a method, apparatus and integrated circuit (IC) for active pre-charging a battery system. The IC may include a pre-charging controller configured to manage pre-charging of a capacitive load. The IC may include a programmable current control module configured to maintain constant charging current based on one or more parameters from the pre-charging controller. The IC may include a smart gate driver configured to drive one or more high voltage field-effect transistors (FETs) based on one or more control signals from the pre-charging controller. The IC may include a boundary mode controller configured to configure inductor current to maintain constant charging current. The IC may include a safety monitoring module configured to detect an overvoltage or undervoltage state based on system voltage monitoring. The IC may include a timing module configured to indicate a charge completion following a defined charge time.

A method of transmitting power by a wireless power transmitter, the method including receiving a plurality of packets including a foreign object detection (FOD) status packet from a wireless power receiver; determining whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet; and transmitting, to the wireless power receiver, a response signal indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a control error packet, a renegotiation packet, an eight-bit received power packet, and a charging status packet, to which a byte encoding technique is applied, and wherein the byte encoding technique is a technique of inserting a start bit, a stop bit, and a parity bit into an encoded binary bit stream of a packet having a length of eight bits.

A battery management system for batteries, such as, but not limited to, electric vehicle battery packs and cells, lithium iron phosphate batteries, lead acid batteries, gel batteries, and absorbed gel mat batteries, in engine start applications is disclosed. The battery management system is configured to control the charge and charging of each cell individually. The battery management system may be configured to control the charge of a battery which may consist of a plurality of cells, such as, but not limited to, lithium iron phosphate cells, and in at least one embodiment, the battery may consist of, but is not limited to being formed from, four lithium iron phosphate cells connected in series and a battery management system to ensure proper charge and safe operation.

Techniques and apparatus for supplying power, including battery balancing and isolating. One example power supply circuit generally includes a first battery node for coupling to a first battery, a second battery node for coupling to a second battery, and a switch circuit coupled between the first battery node and the second battery node and disposed on a same integrated circuit (IC) die as the first battery node and the second battery node. The power supply circuit may be configured to balance the first battery and the second battery without a resistor (e.g., a resistor external to the IC die on which the power supply circuit resides).

The invention provides a magnetic flux generator to enhance ion transport in an electrochemical cell. The magnetic flux generator comprises one or more magnetic field sources, each being configured to produce a respective magnetic field. Each magnetic field is individually controllably variable in three spatial dimensions.

A wireless rechargeable solid-state battery module includes a solid-state battery; an internal structure including an internal circuit electrically connected with the battery; positive and negative electrode terminals, each of which is electrically connected with the solid-state battery, is exposed on an outer surface, and is where the positive or negative electrode terminal can be mounted on an electronic circuit board; barrier layers that entirely or partially contain a conductor and isolate the battery and the internal structure from an outside air environment; and a power receiving terminal electrically connected with an external circuit, which includes a power receiving coil coupled with an external electromagnetic or magnetic field, is electrically connected with the internal circuit, and is in an outside of the barrier layers. The power receiving coil converts the external electromagnetic or magnetic field into electrical energy and supplies current to the internal circuit via the power receiving terminal.

A management method of a battery system includes determining whether a wireless communication failure occurs between a master battery management system (BMS) and at least one of a plurality of slave battery management systems (BMSs); receiving road condition information of where the vehicle equipped with the battery system is currently positioned if the wireless communication failure occurs; determining whether the vehicle is on the road based on the road condition information; setting a first failure confirmation time if the current position of the vehicle is on the road; setting a second failure confirmation time if the current position of the vehicle is not located on the road; and entering a safety mode if a wireless communication failure section from the time when the wireless communication failure occurs to the current time reaches the first failure confirmation time or the second failure confirmation time.

A method of receiving power by a wireless power receiver, the method including transmitting, to a wireless power transmitter, a plurality of packets including a foreign object detection (FOD) status packet; and receiving, from the wireless power transmitter, a response signal indicating whether a foreign object is present in a charging area of the wireless power transmitter, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, and wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a configuration packet, an identification packet for transmitting receiver identification information, an extended identification packet, a general request packet, a special request packet, a control error packet, a renegotiation packet, a 24-bit received power packet, an eight-bit received power packet, and a charging status packet.

A battery device with a C-rate of 1C includes a battery cell, a protection chip, and a microcontroller. The protection chip is electrically connected to the battery cell, determines whether to activate the protection mechanism of the battery device according to the state of the battery cell. The microcontroller is electrically connected to the protection chip, detects the RSOC of the battery cell. When an external power supply is electrically coupled to the battery device, and the RSOC of the battery cell is lower than 50%, the microcontroller controls the battery cell to perform a fast charging not over 10 minutes. During the 10 minutes of fast charging, the protection chip activates the protection mechanism, or the microcontroller detects that the battery cell has changed from a CC state to a CV state, the microcontroller stops the fast charging and restores the C-rate of the battery cell to 1C.

The present invention relates to an individual discharging system and method of a battery rack, and more particularly, to an individual discharging system and method of a battery rack capable of individually discharging a battery rack without dependence on an external load.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on / off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

A WPT circuit is provided. The WPT circuit includes a radio frequency (RF) front-end circuit, a power path circuit, an auxiliary path circuit, a control circuit and a switch circuit. The RF front-end circuit is configured to convert a single-end input signal received by an antenna into differential input signals. The power path circuit is configured to convert the differential input signals into a direct current (DC) output voltage. The auxiliary path circuit is configured to convert the differential input signals into a DC supply voltage. The control circuit is configured to utilize the DC supply voltage as a power source and generate a control signal according to the DC output voltage. The switch circuit is configured to determine whether to conduct the DC output voltage to the energy storage element according to the control signal.

A first overvoltage protection OVP threshold is set for the electronic device, and when a voltage of a battery is greater than the first OVP threshold, a power supply module is controlled not to supply power to a load; the power supply module is controlled not to charge a battery in a battery module; and the battery in the battery module is controlled to supply power to the load until the voltage of the battery is always less than a second OVP threshold in preset duration, where the second OVP threshold is less than the first OVP threshold.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on / off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

A Universal Serial Bus (USB)-Power Delivery (PD) integrated circuit (IC) controller is described. The controller includes: a first USB port configured for coupling the USB-PD IC controller to a USB power adaptor; a second port configured for coupling the USB-PD IC controller to a wireless charging station; and logic configured to control a level of a voltage output by the USB power adaptor and to control an output power level of the wireless charging station, wherein an input voltage of the wireless charging station corresponds to the voltage output by the USB power adaptor or is derived from the voltage output by the USB power adaptor. The IC controls both USB-PD and wireless power simultaneously as a system to transmit power and may limit the output power to prevent overload conditions. A corresponding wireless charging system and method of operating the wireless charging system are also described.

Application of a high voltage to a battery cell in which a current is cut off without using a DC / DC converter is suppressed. A battery pack system 10 includes a plurality of basic battery units 60 in which a plurality of battery cells 41 charged by a current supplied from a power supply are connected in series, and one or a plurality of battery groups 61 in which the plurality of basic battery units 60 are connected in parallel, each of the plurality of battery cells 41 includes a current cutoff means that cuts off a current flowing between electrodes of the battery cells 41, and a series number of the plurality of battery cells 41 connected in series of the basic battery unit 60 is determined based on a parallel number of the basic battery units 60, a current It supplied from the power supply, and a resistance component R of the battery cell 41.

A power supply module includes a capacitor module, a signal acquisition module, a module controller and a communication module. The capacitor module includes a supercapacitor, a charging circuit and a discharging circuit, where the charging circuit is configured to charge the supercapacitor, and the discharging circuit is configured to discharge a magnet in a magnetic confinement fusion apparatus via a bus. The signal acquisition module is configured to acquire a state signal of the capacitor module. The module controller is configured to control a charging-discharging state of the capacitor module and monitor the capacitor module based on the state signal. The communication module is configured to communicate with a module controller in another power supply module or a main controller in a power supply system. The power supply system is formed by multiple power supply modules and is configured to supply power to the magnet.

A method of transmitting power by a wireless power transmitter, the method including receiving a plurality of packets including a foreign object detection (FOD) status packet from a wireless power receiver; determining whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet; and transmitting, to the wireless power receiver, a response signal indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, wherein each of the plurality of packets includes a preamble, a header, a message, and a checksum for identifying whether an error occurs in each packet, and wherein a size of the message included in the each packet is identified on the basis of a value of the header.

A battery system includes a battery subpack having first and second battery cells, a cell monitoring circuit, a RF transmitter, an RF receiver, a subpack microprocessor, and a first transceiver. The circuit measures a voltage of a first battery cell. The system includes a master controller having a second transceiver. The RF transmitter sends a voltage value corresponding to the voltage of the first battery cell to the RF receiver. The subpack microprocessor determines the first battery cell has an overvoltage condition based on the voltage value and sends an overvoltage message to the master controller via the first and second transceivers. The subpack microprocessor induces first and second subpack contactors to each have an open operational state when the master controller sends an open command to the subpack microprocessor.

A method can be used to control a battery management system. A first voltage drop is sensed between a first terminal of a first battery cell and a second terminal of the first battery cell and a second voltage drop is sensed between a first terminal of a second battery cell and a second terminal of the second battery cell. A faulty condition is detected in the first battery cell or the second battery cell based on the first voltage drop or the second voltage drop. The first voltage drop is swapped for a first swapped voltage drop between a common terminal and the second terminal of the second battery cell.

A portable energy charging system and method for remote, isolated, and mobile energy charging for aerospace or aircraft vehicles which cannot be coupled to stationary (transmissions lines based) vehicle charge systems. The aircraft charging method includes connecting a portable energy source to an energy storage system in the aircraft vehicle and transferring an amount of energy from the portable energy source to the energy storage system in the aircraft. The charging system monitors, using one or more sensor devices, one or more charge condition parameters associated with the charging conditions at said energy storage system of the aircraft vehicle when receiving energy transferred from said portable energy source and detects any condition when a monitored parameter is a value exceeding a threshold level value. In response to detecting a condition when a monitored parameter is of a value exceeding a threshold level value, the charging system responsively initiates a correction.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on / off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

A secondary circuit device including a secondary coil for transmitting and / or receiving magnetic energy of a magnetic field and converting the magnetic energy into electrical energy; a rectifier for rectifying the electrical energy; and a detection unit; wherein the secondary coil is connected to the rectifier via a conducting unit, the conducting unit for transmitting electrical active energy and an electrical reactive energy; the conducting unit connected to an input of the rectifier; the rectifier having an output for providing the electrical active energy as voltage and / or current; the detection unit connected to the input and / or the output of the rectifier to detect an overvoltage at the input and / or the output of the rectifier and / or an external magnetic field; and, when the overvoltage is detected, the detection unit is designed such that it influences the conducting unit and / or the magnetic field to limit the transmission of the electrical active energy.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on / off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on / off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

An electrical circuit for protecting an electronic device, and a method of operating the electric circuit, can involves the use of a protection circuit that includes a group of diodes and one or more field effect transistors, along with an energy storage device associated with the electronic device. The field effect transistors are electrically connected to the group of diodes, and reference voltage associated with the protection circuit is tunable to trigger the protection circuit at a threshold voltage, which when triggered activates the field effect transistor(s) to protect the energy storage device from an over voltage condition or an over charging condition until the over voltage condition or the overcharging condition is no longer present.

An apparatus for supplying emergency power according to an embodiment of the present disclosure includes: a protection circuit unit connected to a battery and configured to limit an available voltage range of the battery; a bypass unit connected in parallel to the protection circuit unit and configured to form a bypass path of a current output from the battery according to an operation state of a disposed switching element; and a control unit configured to electrically connect the bypass path formed by the bypass unit by controlling the operation state of the switching element to a turn-on state.