Abstract: A stator assembly for an electrical machine comprises a stator, a plurality of inserts and a heat sink. The stator comprises an annular core extending around an axis (X) and a plurality of axially extending slots. A plurality of sets of electrical windings is arranged within the slots. The windings have axial end portions arranged at axial ends of the core. The inserts comprise ceramic plates which are arranged in respective slots in the gaps (G) between adjacent respective electrical windings in the slots. The inserts extend axially from the respective slots for engagement with the heat sink.

Abstract: A stator assembly for an electrical machine comprises an annular core extending around an axis (X) and comprising a plurality of axially extending slots. A plurality of electrical windings are arranged in the slots and have end portions arranged at the axial ends of the core. A cooling jacket at least partially extends around a radially outer surface of the core. At least one annular cooling plate is mounted to an axial end of the cooling jacket and arranged in thermal contact with the end portions of the electrical windings.

Abstract: A stator assembly for an electrical machine comprises a stator, a plurality of inserts and a heat sink. The stator comprises an annular core extending around an axis (X) and a plurality of axially extending slots. A plurality of sets of electrical windings is arranged within the slots. The windings have axial end portions arranged at axial ends of the core. The inserts comprise ceramic plates which are arranged in respective slots in the gaps (G) between adjacent respective electrical windings in the slots. The inserts extend axially from the respective slots for engagement with the heat sink.

Abstract: A stator assembly for an electrical machine comprises an annular core extending around an axis (X) and comprising a plurality of axially extending slots. A plurality of electrical windings are arranged in the slots and have end portions arranged at the axial ends of the core. A cooling jacket at least partially extends around a radially outer surface of the core. At least one annular cooling plate is mounted to an axial end of the cooling jacket and arranged in thermal contact with the end portions of the electrical windings.

Abstract: A method of manufacturing a stator assembly for an electric motor or generator is disclosed, comprising: providing a plurality of stator windings, each stator winding formed from a multistrand cable that comprises a plurality of wires that are electrically insulated, connecting an end of the multistrand cable of each stator winding to a respective conductive stud and then mounting the stator windings in a stator housing.

Abstract: A battery pack is disclosed. In one aspect, the battery pack includes a chargeable battery and a battery management system (BMS) configured to charge the battery in a plurality of charging periods each including a constant current supply period and a constant voltage supply period. The battery pack also includes a resistance estimator configured to estimate the resistance of the battery. The BMS is further configured to change a charging period of the battery from a constant voltage supply period of an ith charging period to a constant current supply period of an (i+1)th charging period based on the resistance of the battery, and wherein i is a natural number.

Abstract: A method of charging a battery includes performing a first charging operation in a first period, performing a second charging operation in a second period, and performing a third charging operation in a third period. Each of the first, second, and third periods includes a constant current supplying period and a constant voltage supplying period. Different currents are supplied in the constant current supplying periods of at least two of the first, second, and third periods. Different voltages are supplied in the constant voltage supplying periods of at least two of the first, second, and third periods. The second period is between the first and third periods, and the second period is longer than the first and third periods.

Abstract: A method of charging a battery and a battery charging system, which has a relatively high charging speed while having a relatively low level of battery deterioration. The charging method includes charging a battery cell with a first current in a first constant current mode; charging the battery cell with a first voltage in a first constant voltage mode; idling the charging of the battery cell for a first idle period (t); charging the battery cell with a second current different from the first current in a second constant current mode; and charging the battery cell with a second voltage different from the first voltage in a second constant voltage mode.

Abstract: A battery pack is disclosed. In one aspect, the battery pack includes a chargeable battery and a battery management system (BMS) configured to charge the battery in a plurality of charging periods each including a constant current supply period and a constant voltage supply period. The battery pack also includes a resistance estimator configured to estimate the resistance of the battery. The BMS is further configured to change a charging period of the battery from a constant voltage supply period of an ith charging period to a constant current supply period of an (i+1)th charging period based on the resistance of the battery, and wherein i is a natural number.

Abstract: A method of charging a battery includes performing a first charging operation in a first period, performing a second charging operation in a second period, and performing a third charging operation in a third period. Each of the first, second, and third periods includes a constant current supplying period and a constant voltage supplying period. Different currents are supplied in the constant current supplying periods of at least two of the first, second, and third periods. Different voltages are supplied in the constant voltage supplying periods of at least two of the first, second, and third periods. The second period is between the first and third periods, and the second period is longer than the first and third periods.

Abstract: A method of charging batteries and a battery charging system are disclosed. One inventive aspect includes a battery pack and a charging unit. The battery pack further comprises a battery cell, a voltage sensor and a current sensor. The charging unit is configured to charge the battery cell with a constant current or a constant voltage at least partially based on the voltage of the battery cell sensed by the voltage sensor.

Abstract: A method of charging a battery and a battery charging system, which has a relatively high charging speed while having a relatively low level of battery deterioration. The charging method includes charging a battery cell with a first current in a first constant current mode; charging the battery cell with a first voltage in a first constant voltage mode; idling the charging of the battery cell for a first idle period (t); charging the battery cell with a second current different from the first current in a second constant current mode; and charging the battery cell with a second voltage different from the first voltage in a second constant voltage mode.