Patent ID: 11927641
Assignee: KOKI HOLDINGS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  B  H  Y | IPC G  H

Claim 0:
1. A battery pack, comprising: a plurality of battery cells connected in series; a plurality of voltage detection units which detect a voltage of each of the battery cells; and a control unit having a microcomputer which measures the voltages of the battery cells from the output of each of the voltage detection units, wherein
switch control circuits configured to switch on or off the outputs from the voltage detection units to the microcomputer are respectively arranged on the plurality of voltage detection units,
voltage divider circuits configured to divide the detected voltages into voltages lower than or equal to a power supply voltage of the control unit are respectively arranged on output sides of the voltage detection units,
the plurality of battery cells comprise at least a first battery cell and a second battery cell from a ground side,
the plurality of voltage detection units are connected to a common ground,
a first voltage detection unit of the plurality of voltage detection units detects a voltage of only the first battery cell,
a second voltage detection unit of the plurality of voltage detection units detects a combined voltage of the first battery cell and the second battery cell,
the microcomputer is configured to measure the voltages of the battery cells from the voltages divided by the voltage divider circuits, and
a time interval of voltage detection performed by the plurality of voltage detection units is changed for each of the voltage detection units according to a state of the battery pack.