Title:
BATTERY PACK MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/235027
Kind Code:
A1
Abstract:
The present disclosure is provided with: first and second wires which are connected to a positive electrode and a negative electrode of each of battery cells constituting a battery pack (1); an RC filter (10) formed of a resistor element (8) that is inserted in the battery cell positive electrode side of the first wire, and a capacitor (9) that is disposed between the first and second wires; and a discharging switch (12) which is disposed between the second wire and the second wire connected to the negative electrode of a one-stage upper battery cell, in a voltage monitoring device including a voltage detector between the first and second wires. The first and second wires and the discharging switch are also connected to both ends of an inter-cell group wire. In the second wire connected to each of the battery cells, a discharging resistor element (7) is disposed at a position so as not to cause discharging of the charge in the capacitor. In the second wire connected to the low potential side of the inter-cell group wire, a current restricting resistor element (14) having a higher resistance value than the discharging resistor element is disposed. Alternative discharging switches (15, 22) and a discharging resistor element (16) are provided which are connected between the second wire connected to the low potential side and the voltage monitoring device-side terminal of the discharging resistor element in the one-stage lower second wire. The switches are turned on upon a voltage drop generated when current flows through the current restricting resistor element.
Inventors:
YAMAMOTO SHUNYA (JP)
MIURA RYOTARO (JP)
TOMONAGA YUKIHIRO (JP)
MIURA RYOTARO (JP)
TOMONAGA YUKIHIRO (JP)
Application Number:
PCT/JP2019/012161
Publication Date:
December 12, 2019
Filing Date:
March 22, 2019
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02J7/02; G01R19/00; H01M10/44; H01M10/48
Domestic Patent References:
| WO2017073018A1 | 2017-05-04 | |||
| WO2014171013A1 | 2014-10-23 |
Foreign References:
| JP2010141957A | 2010-06-24 | |||
| JP2007282459A | 2007-10-25 |
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (JP)
Download PDF: