Charge wake-up circuit for a battery management system

• US 10,097,023 B2
• Filed: 04/12/2016
• Issued: 10/09/2018
• Est. Priority Date: 07/23/2015
• Status: Active Grant

• Current Assignee: Heifei University Of Technology
• Original Assignee: Heifei University Of Technology
• Inventors: Liu, Xintian, He, Yao, Zeng, Guojian, Zheng, Xinxin
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US15/096,890
• Publication Number:
  US 20170025877A1
• Time in Patent Office: 910 Days
• Field of Search: 320107, 320127, 320128, 320132
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

A charge wake-up circuit for Battery Management System (BMS). The circuit includes the charge-discharge module and charge detection module. The charge-discharge module contains Charger W, load R1, first switch K1, second switch K2, battery E, charge MOSFET M1 and discharge MOSFET M2. The charge detection module contains inductance L 1, first diode D1, second diode D2, first resistor R2, second resistor R3, third resistor R4, fourth resistor R5, fifth resistor R6, sixth resistor R7, seventh resistor RS, first capacitor C1, second capacitor C2, third capacitor C3, first transistor Q1, second transistor Q2 and photocoupler U.

Claims

1. A charge wake-up circuit for a battery management system (“

BMS”

), comprising;

a charge-discharge module including a charger, a load, at least first and second switches, a battery, a charge MOSFET, and a discharge MOSFET, wherein the charger and the first switch form a first series branch, the load and the second switch form a second series branch, and the charge MOSFET and discharge MOSFET form a third series branch, and wherein further the three series branches are in parallel to form the charge-discharge module; and

a charge detection module including an inductance, a first diode, a second diode, a plurality of resistors, at least first, second and third capacitors, at least first and second transistors, and a photocoupler, wherein an anode of the first diode is connected to the anode of the battery, a cathode of the first diode is connected to a fifth one of the plurality of resistors, the fifth one of the plurality of resistors is connected to both a sixth one of the plurality of resistors and the first capacitor, the first capacitor is connected to ground, the sixth one of the plurality of resistors is connected to the second capacitor and the photocoupler, a port of the second capacitor and the photocoupler form a common port to be connected to the collector of the first transistor and the second transistor, an emitter of the first transistor is connected to a base of the second transistor through a seventh one of the plurality of resistors, an emitter of the second transistor is connected the third capacitor and a fourth one of the plurality of resistors, a port of the third capacitor and the fourth one of the plurality of resistors forms a second common port which is connected to a second one of the plurality of resistors and a third one of the plurality of resistors, the third one of the plurality of resistors is connected to the base of the first transistor, the second one of the plurality of resistors is connected to a cathode of the second diode, an anode of the second diode is connected to a first one of the plurality of resistors, the first one of the plurality of resistors is connected to an inductance, and the inductance is connected to a cathode of the battery.