Abstract: The present invention discloses a charging management system and a charger with such charging management system. The charging management system includes a first signal-output port, a second signal-output port, a third signal-output port and a controller electrically connected with the first, second and third signal-output ports. The first and second signal-output ports are adapted for outputting first and second control signals representing first and second charging currents, respectively, to a charging circuit. The third signal-output port is adapted for outputting a third control signal representing a variable third charging current to the charging circuit. The controller controls the charging management system to operate under at least one of two modes. In the first mode, the controller alternately controls the first and second signal-output ports to output the first and second control signals. In the second mode, the controller only controls the third signal-output port to output the third control signal.

Abstract: In one aspect of the invention, a battery management system includes a plurality of battery units, a voltage sensing module for detecting a voltage of each battery unit, an active balancing module for reducing a total voltage of the battery units and transmitting the reduced total voltage to a given battery unit needed to be charged, a controller electrically connected with the voltage sensing module and the active balancing module, and signal buses electrically connected with the voltage sensing module and the active balancing module. The signal buses are controlled by the controller to selectively electrically connect with the positive pole and the negative pole of one of the battery units. The controller is adapted for obtaining voltage signals from the voltage sensing module, determining the given battery unit according to the obtained voltage signals, and controlling power provided by the active balancing module for charging the given battery unit.

Abstract: The present invention discloses a charging management system and a charger with such charging management system. The charging management system includes a first signal-output port, a second signal-output port, a third signal-output port and a controller electrically connected with the first, second and third signal-output ports. The first and second signal-output ports are adapted for outputting first and second control signals representing first and second charging currents, respectively, to a charging circuit. The third signal-output port is adapted for outputting a third control signal representing a variable third charging current to the charging circuit. The controller controls the charging management system to operate under at least one of two modes. In the first mode, the controller alternately controls the first and second signal-output ports to output the first and second control signals. In the second mode, the controller only controls the third signal-output port to output the third control signal.

Abstract: A nano cathode material usable for batteries and a method for preparing the same are provided. The cathode material is comprised of nano particles so that the specific surface area of such particles is increased, thereby allowing a suitable size distribution of the particles, improving the conductivity of the cathode material, and maintaining the capacity characteristics of the cathode material for batteries.

Abstract: A method for preparing a cathode material. In one aspect, the method includes: (1) providing a mixture of at least one iron-containing compound, at least one lithium-containing compound, at least one phosphorus-comprising compound, and at least one oxygen-containing compound, and (2) sintering the mixture, in which the decomposition temperature of the iron-containing compound and the lithium-containing compound is lower than that of the phosphorus-comprising compound and/or the oxygen-containing compound. The cathode material thus prepared, for example, a LiFePO4 powder, has a purity ranging from about 90% to about 95% by weight, and a gram specific capacity ranging from about 150 to about 170 mAh/g.

Abstract: The present invention relates to a battery management system and a method thereof. The system includes a number of battery units connected in series, a DC/DC converter module and a controller controlling the DC/DC converter module to operate under one of at least two operation modes. The battery units include a given battery unit needed to be charged. When the DC/DC converter module operates in a first operation mode, the DC/DC converter module receives and reduces a total voltage of all the battery units and transmits the reduced voltage to charge the given battery unit. When the DC/DC converter module operates in a second operation mode, the DC/DC converter module receives and converts a cumulated voltage of part of the battery units and transmits the converted voltage to charge the given battery unit.

Abstract: A battery module includes a top bracket, a bottom bracket, a number of batteries clamped by the top and bottom brackets, and an insulative cover fixed to a top side of the top bracket. The top bracket includes a number of top recesses and a number of top separators separating the top recesses from each other. The bottom bracket includes a number of bottom recesses and a number of bottom separators separating the bottom recesses from each other. The top recesses and the bottom recesses are aligned with each other for fixing top sides and bottom sides of the batteries, respectively. The batteries are separated from each other by the top separators and the bottom separators.

Abstract: A lithium ion battery includes a cell assembly and a casing containing the cell assembly. The cell assembly includes a plurality of positive electrode plates and a plurality of negative electrode plates. The positive electrode plates and the negative electrode plates are alternatively arranged in a stack. Each positive electrode plate and each negative electrode plate includes a base substrate covered with electrode pastes. A total of 121-161 pieces of the positive electrode plates and the negative electrode plates are arranged within per 18 mm length of the battery.

Abstract: A lithium ion battery includes a casing, a cell assembly received in the casing, a cap assembly encapsulating the casing and electrolyte filling within the casing. The cell assembly comprises a number of stacked electrode plates and a separator sandwiched between two stacked electrode plates. The electrode plates comprise positive electrode plates and negative electrode plates. Each positive electrode plate is provided with a pair of negative electrode plates positioned on opposite sides of the positive electrode plate.

Abstract: A battery system includes a battery module, a frame for receiving the battery module, a cover covering the frame, a heat sink, a battery management circuit board and a battery balancing circuit board. The battery module includes a bracket assembly and a number of batteries fixed to the bracket assembly. The batteries are electrically connected to each other. The battery management circuit board is fixed to the bracket assembly and electrically connected to the batteries. The battery management circuit board is separated by a distance from the bracket assembly. The battery balancing circuit board is fixed to the heat sink and includes a battery balancing control module for controlling surplus electric energy of the batteries dissipated into thermal energy.

Abstract: A method for preparing a cathode material is provided, which includes: providing particles of a cathode material; coating a carbon layer onto the particles of the cathode material, in which the carbon layer is formed of a carbon-containing compound; and mixing the carbon-containing compound with the particles at a temperature equal to or lower than 0° C. According to the method, the lithium ferrous phosphate powder does not agglomerate in the carbon coating process, and the carbon-coated particles have slightly increased volumes so that the nano-lithium ferrous phosphate material maintains its nano size after being coated with carbon.

Abstract: A casing for a lithium ion battery is formed by a piece of metal sheet. The casing includes a bottom wall and a plurality of side walls extending upwardly from the bottom wall to define a top opening opposite to the bottom wall. The plurality of side walls includes at least two opposite side walls, each defining a recess region recessing inwards therefrom. The recess region has a symmetrical shape.

Abstract: A lithium ion battery includes a cell assembly, a casing containing the cell assembly, a cap assembly and electrolyte filling in the casing. The cell assembly has stacked electrode plates with separators disposed between neighbored electrode plates. The casing has a bottom wall, a number of side walls extending vertically from the bottom wall, and a receiving space defined by the bottom wall and the number of side walls with an opening opened outwards. The cap assembly includes a cap plate covering the opening and encapsulating the cell assembly in the casing. A recessed structure is formed on the side wall of the casing.