A management device 21 comprising a main control part 23 that, during charging of a plurality of power storage elements 41 connected in series, outputs a first pull-down signal to a converter 11 so as to lower a charging voltage when the cell voltage of any of the power storage elements 41 is equal to or greater than a first threshold value.

A battery module for high voltage battery packs, preferably for use in vehicles, comprising a plurality of battery cells each comprising an electronic battery cell monitoring module attached to each of the battery cells, with the battery cell monitoring modules being connected to one another by a balancing bus comprising at least two electrical lines for transmitting data and electrical current, with the electronic battery cell monitoring modules being electrically connected to a positive terminal and to a negative terminal of the battery cell, with the electronic battery cell monitoring modules having a first electrical switch and a second electrical switch, with the electrical switches being configured to electrically connect the battery cells to a respective one of the two electrical lines of the balancing bus, with the battery module comprising an energy storage module for storing electrical energy, with the energy storage module being electrically connected to the two electrical lines of the balancing bus to take up or output energy over them, and with the electronic battery cell monitoring modules and the energy storage module being connected to one another by the balancing bus forming a cell balancing system.

The invention provides an equalizing device for a vehicle soft-packed battery and an equalizing method for the soft-packed battery. According to the equalizing method for the vehicle soft-packed battery, a battery to be equalized is connected to a parallel equalization circuit by using an equalizing device for a vehicle soft-packed battery, battery cells to be equalized are sequentially equalized by adopting a first-in first-out sequence, and the SOC of each cell equalized is maintained within a preset range; and the number of the cells entering the equalizing device for the vehicle soft-packed battery is N, and the equalizing time of the battery cells is T. The equalizing device for the vehicle soft-packed battery comprises a holder clamping type or a copper sheet compressing type. On the premise of remarkably improving the equalizing efficiency of the battery cell, the invention can reduce the space and cost required by the equalizing operation, and ensure that the SOC difference of the equalized battery cell is maintained within a certain range, and it is a low-cost high-efficiency battery cell equalizing device. The invention is suitable for equalizing a large number of battery cells on a production line.

Disclosed is a master battery management system (BMS) including: a transmission unit for transmitting a cell balancing start command signal and a temperature measurement command signal to a plurality of slave BMSs; a wired communication unit for transmitting a FAN ON signal to a plurality of fans after the transmission unit wirelessly transmits the cell balancing start command signal; a reception unit for receiving an association signal from an associated slave BMS having a difference in temperature of a printed circuit board (PCB) board of a corresponding slave BMS and a temperature of a PCB substrate of a corresponding slave BMS that is greater than a preset value; and a control unit for determining that the associated slave BMS is disposed in the same rack, and changing an ID and communication channel of the associated slave BMS to a specific value.

An auxiliary battery storage device stores an auxiliary battery that is used for performing cell balancing to a main battery adopted in an electric vehicle or supplying power to the main battery having low state of charge (SOC). The auxiliary battery storage device includes a case body formed in a box shape with a top portion that is open and an inner space in which the auxiliary battery is stored; a case body cover coupled to the case body to open or close the top portion of the case body; a terminal connection member fixed to an inner surface of the case body cover to contact a power terminal of the auxiliary battery when the top portion of the case body is closed by the case body cover; and a power cable configured to extend from the terminal connection member to the main battery.

A method for operating a battery system with a plurality of cells, a battery system, a vehicle including such a battery system and a computer program element for operating such a battery system. The method for operating a battery system includes monitoring a state of health of each of the plurality of cells, detecting at least one malfunctioning cell, analysing the state of health of the malfunctioning cell, limiting a discharge power over a time period if the malfunctioning cell has a worst state of health in the battery system or limiting a charge power over a time period if the malfunctioning cell has a best state of health in the battery system, and reducing a minimum state of charge of the battery system over the time period.

Methods, systems, and devices for power electronics-based (PE-based) battery management. A system may include a set of battery strings, where each battery string may include a set of battery modules, and where each battery module may include a set of battery cells. The system may also include a set of power converters, where each power converter may be coupled with at least one battery string. A power electronics-based (PE-based) BMS may provide one or more battery management functions for at least one corresponding battery string while also monitoring or controlling a corresponding power converter.

An electronic device included a first energy storage device coupled to a second energy storage device by a conductor. A charging node is coupled to the first energy storage device. Another conductor couples the charging node to the second energy storage device. A switch is electrically coupled between the conductor and the second energy storage device. A control circuit opens the switch, thereby allowing a first charging current to flow from the charging node to the first energy storage device through the conductor and a second charging current to flow from the charging node to the second energy storage device through the other conductor and closes the switch when a difference between a voltage of the first energy storage device and a voltage of the second energy storage device is within a predefined voltage difference threshold.

Systems and methods are described for managing charging and discharging of battery packs. In one or more aspects, a system and method are provided to minimize overcharging of battery cells of specific battery chemistries while still enabling fast charging cycles. In other aspects, a buck converter may be used to reduce a voltage of power used to charge the cells. In further aspects, a fast overcurrent protection circuit is described to address situations involving internal short circuits of a battery cell or battery pack. In yet further aspects, a bypass circuit is provided in series-connected battery packs to improve the charging of undercharged battery packs while also increasing the efficiency of the overall charging process. In other aspects, a circuit is provided that permits a controller to determine a configuration of battery packs. In yet further aspects, a system may determine a discharge current for a collection of battery packs based on each battery pack's state of health (SOH) and forward that determination to an external device.

A battery system with a large-format Li-ion battery pack powers attached equipment by discharging battery cells distributed among a plurality of battery packs. A limp home notification is generated from a smart lithium-ion battery pack to one or more application devices using an analog signal. The battery pack may provide broadcast messages over electronic communication lines, that includes state of charge (SoC), fault status, etc. which can be read by one or more application devices to enter limp home mode. In another example, a “fully charged” notification is generated from the smart lithium-ion battery pack to one or more application devices using an analog signal. The end device powered by the battery pack system receives and reacts to the outputted fully charged signal by modifying the state of the circuitry on the end device.