Title:
METHOD FOR MEASURING STATUS OF CAPACITY OF AUTOMOBILE BATTERY PACK AND AUTOMOBILE BATTERY MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/000520
Kind Code:
A1
Abstract:
A method for measuring the status of capacity of an automobile battery pack. The method is specifically as follows: a BMS controller controlling a controllable switch to close, so that a constant-current source supplies a constant calibrated current I0 to a shunt; a BMS current test module measuring a voltage U0 across two ends of a shunt resistor; a temperature sensor measuring the temperature T0 of the shunt resistor; when the temperature T0 is calculated, the shunt resistor (I) recording a calculation result in the BMS controller; repeating the above steps, so that a series of temperature and resistance values of the shunt resistor can be obtained; and when a main relay of an automobile is closed, after a high voltage is connected, the BMS current test module measuring a voltage Ut across two ends of the shunt resistor, and the temperature sensor recording a temperature Tt, so that the current It of the shunt resistor at this time can be calculated according to data stored by the BMS controller. Therefore, the problem whereby a current cannot be accurately measured is solved, thereby realizing the accurate estimation of the status of capacity (SOC) of a battery.
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Inventors:
WANG RENJIE (CN)
Application Number:
PCT/CN2019/124032
Publication Date:
January 07, 2021
Filing Date:
December 09, 2019
Export Citation:
Assignee:
SHANGHAI HETA MOTOR TECH CO LTD (CN)
International Classes:
G01R31/385; B60L58/12
Domestic Patent References:
| WO2006136475A1 | 2006-12-28 |
Foreign References:
| CN110208715A | 2019-09-06 | |||
| CN107589291A | 2018-01-16 | |||
| CN203455460U | 2014-02-26 | |||
| CN103901349A | 2014-07-02 | |||
| CN102004226A | 2011-04-06 | |||
| JPH08103003A | 1996-04-16 |
Attorney, Agent or Firm:
SHANGHAI HANGSOME INTELLECTUAL PROPERTY LTD (CN)
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