DISCONNECTION ABNORMALITY DIAGNOSIS DEVICE

WIPO Patent Application WO/2022/097423

A1

This disconnection abnormality diagnosis device comprises: an equalization circuit (11) comprising a first equalization switch (Sa) that is provided to correspond to each of a plurality of battery cells and connects a pair of shunt lines connected to both electrodes of the battery cell such that the pair of shunt lines can be short-circuited; a second equalization switch (Sa13) that is provided to correspond to an interstack cell and formed adjacent to and between the plurality of equalization circuits, shares the shunt lines of the adjacently formed equalization circuits, and connects the shunt lines shared on both sides such that the shunt lines can be short-circuited, and a backflow prevention part (D; G) that is connected to prevent backflow of a current flowing through the second equalization switch when negative voltage is generated in the interstack cell; and a disconnection sensing part (10a) that, after temporarily turning on and off the first equalization switch of the equalization circuit corresponding to the battery cell adjacent to the interstack cell, senses disconnection on the basis of whether or not the detected voltage of the adjacent cell detected by a voltage detection circuit reaches a predetermined first threshold value.

UTAGAWA YOSHIYUKI (JP)
UEHARA KOTA (JP)
TOMONAGA YUKIHIRO (JP)
HIRAOKA MOTOSHI (JP)

PCT/JP2021/037403

May 12, 2022

October 08, 2021

Click for automatic bibliography generation  

DENSO CORP (JP)

H01M10/48; G01R31/54; H02J7/00

JP2015083960A	2015-04-30
JP2018007392A	2018-01-11

SATO INTERNATIONAL PATENT FIRM (JP)

View/Download PDF      PDF Help

Previous Patent: CONTAINER INCLUDING RFID MODULE

Next Patent: MULTILAYER CIRCUIT BOARD IN WHICH SIGNAL POWER SOURCE SEPARATION CIRCUIT IS FORMED