Title:
LOAD ACCESS DETECTION METHOD, SWITCH CIRCUIT AND BATTERY MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/203722
Kind Code:
A1
Abstract:
A load access detection method, a switch circuit and a battery management system, which relate to the technical field of circuits. The load access detection method comprises: detecting a voltage at a first detection point, the first detection point being electrically connected to a positive electrode of a battery (301) in a battery pack (30) by means of a bridging resistor R1; detecting a voltage at a second detection point, the second detection point being short-circuited to the first detection point when the battery pack (30) is connected to a load circuit (40); and if the voltage difference between the voltage at the first detection point and the voltage at the second detection point is less than or equal to a preset voltage threshold, controlling a switch circuit (20) to enter a pre-charging mode, and pre-charging a load capacitor C1 in the load circuit (40) by means of the battery pack (30), a charging current of the switch circuit (20) in the pre-charging mode being less than a charging current of the switch circuit (20) in a charging mode.
Inventors:
ZHANG XU (CN)
MA HANG (CN)
WANG XINGCHANG (CN)
MA HANG (CN)
WANG XINGCHANG (CN)
Application Number:
PCT/CN2020/133455
Publication Date:
October 14, 2021
Filing Date:
December 02, 2020
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
B60L3/12; B60L58/10; G01R19/00; G01R31/00
Foreign References:
| CN111301173A | 2020-06-19 | |||
| CN102166959A | 2011-08-31 | |||
| CN104553813A | 2015-04-29 | |||
| CN104865519A | 2015-08-26 | |||
| CN110239391A | 2019-09-17 | |||
| JP2019161816A | 2019-09-19 |
Other References:
See also references of EP 3922503A4
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