US 12,444,956 B2
Nitride-based bidirectional switching device for battery management and method for manufacturing the same
Qiyue Zhao, Suzhou (CN); Wuhao Gao, Suzhou (CN); and Baoli Wei, Suzhou (CN)
Assigned to INNOSCIENCE (SUZHOU) SEMICONDUCTOR CO., LTD., Suzhou (CN)
Filed by INNOSCIENCE (SUZHOU) SEMICONDUCTOR CO., LTD., Suzhou (CN)
Filed on Nov. 30, 2022, as Appl. No. 18/072,633.
Application 18/072,633 is a division of application No. 17/777,058, previously published as PCT/CN2022/072558, filed on Jan. 18, 2022.
Prior Publication US 2023/0231399 A1, Jul. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); H01M 10/42 (2006.01); H10D 89/60 (2025.01)
CPC H02J 7/00306 (2020.01) [H01M 10/425 (2013.01); H02J 7/00302 (2020.01); H02J 7/0047 (2013.01); H02J 7/0068 (2013.01); H10D 89/814 (2025.01); H01M 2010/4271 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A nitride-based bidirectional switching device for working with a battery protection controller having a power input terminal, a discharge over-current protection (DO) terminal, a charge over-current protection (CO) terminal, a voltage monitoring (VM) terminal and a ground terminal, the nitride-based bidirectional switching device comprising:
a first control terminal configured for electrically connecting to the DO terminal of the controller and a second control terminal configured for electrically connecting to the CO terminal of the controller;
a first conduction terminal configured for electrically connecting to the ground terminal of the controller and a second conduction terminal configured for electrically connecting to the VM terminal of the controller through a voltage monitoring resistor;
a main switching element having a control electrode, a first conduction electrode connected to the first conduction terminal and a second conduction electrode connected to the second conduction terminal;
an adaption module configured for receiving a DO signal and a CO signal from the first and second control terminals respectively and generating a main control signal to the control electrode of the main switching element for controlling the main switching element; and
a substrate potential management module configured for managing a potential of a main substrate of the main switching element to be substantially equal to a lower one of potentials of the first and second conduction terminals,
wherein the adaption module comprises:
a first voltage-clamping element having a positive electrode electrically connected to the first control terminal and a negative electrode electrically connected to a first interconnection node;
a second voltage-clamping element having a positive electrode electrically connected to the second control terminal and a negative electrode electrically connected to the first interconnection node;
a first auxiliary switching element having a control electrode electrically connected to the first control terminal, a first conduction electrode connected to the first interconnection node and a second conduction electrode connected to a second interconnection node;
a second auxiliary switching element having a control electrode electrically connected to the second control terminal, a first conduction electrode connected to the second interconnection node and a second conduction electrode connected to the control electrode of the main switching element; and
a first resistive element having a first electrode electrically connected to the control electrode of the main switching element and a second electrode electrically connected to the first conduction terminal; and
the substrate potential management module comprises:
a third auxiliary switching element having a control electrode electrically connected to the second control terminal, a first conduction electrode electrically connected to the first conduction terminal, and a second conduction electrode electrically connected to the main substrate; and
a fourth auxiliary switching element having a control electrode electrically connected to the first control terminal, a first conduction electrode electrically connected to the second conduction terminal, and a second conduction electrode electrically connected to the main substrate.