SYSTEMS AND METHODS FOR ELECTRICAL ELEMENT FOR INVERTER FOR ELECTRIC VEHICLE
A system includes an inverter configured to convert DC power from a battery to AC power to drive a motor, wherein the inverter includes: a power module, the power module including a thermistor assembly, the thermistor assembly including: a ceramic substrate; a thermistor element on the ceramic substrate; a protective coating disposed on the thermistor element so that the thermistor element is between the protective coating and the ceramic substrate; and a terminal electrode on the ceramic substrate, wherein an angle between a surface of the terminal electrode facing the protective coating and a surface of the protective coating facing the terminal electrode is greater than 90 degrees.
1 . A system comprising an inverter configured to convert DC power from a battery to AC power to drive a motor, wherein the inverter includes:
a power module, the power module including a thermistor assembly, the thermistor assembly including:
a ceramic substrate;
a thermistor element on the ceramic substrate;
a protective coating disposed on the thermistor element so that the thermistor element is between the protective coating and the ceramic substrate; and
a terminal electrode on the ceramic substrate, wherein an angle between a surface of the terminal electrode facing the protective coating and a surface of the protective coating facing the terminal electrode is greater than 90 degrees.
2 . The system of claim 1 , wherein the thermistor assembly further comprises:
a conductive layer; and
a solder layer between the conductive layer and the terminal electrode.
3 . The system of claim 2 , wherein the conductive layer includes copper.
4 . The system of claim 2 , wherein a portion of the terminal electrode overlaps a portion of the protective coating so that the portion of the protective coating is between the portion of the terminal electrode and the ceramic substrate.
5 . The system of claim 2 , wherein a portion of the protective coating overlaps a portion of the terminal electrode so that the portion of the terminal electrode is between the portion of the protective coating and the ceramic substrate.
6 . The system of claim 2 , wherein the protective coating and the terminal electrode do not overlap on the ceramic substrate.
7 . The system of claim 1 , further comprising:
the battery configured to supply the DC power to the inverter; and
the motor configured to receive the AC power from the inverter to drive the motor, wherein the system is provided as a vehicle including the inverter, the battery, and the motor.
8 . A system comprising:
a ceramic substrate;
a terminal electrode on the ceramic substrate;
an electrical element on the ceramic substrate; and
a protective coating disposed on the electrical element so that the electrical element is between the protective coating and the ceramic substrate, wherein an angle between a surface of the protective coating facing the terminal electrode and a surface of the terminal electrode facing the protective coating is greater than 90 degrees.
9 . The system of claim 8 , further comprising:
a conductive layer having a first portion separated from a second portion; and
a solder layer between the terminal electrode and the first portion of the conductive layer.
10 . The system of claim 8 , wherein a portion of the terminal electrode overlaps a portion of the protective coating so that the portion of the protective coating is between the portion of the terminal electrode and the ceramic substrate.
11 . The system of claim 8 , wherein a portion of the protective coating overlaps a portion of the terminal electrode so that the portion of the terminal electrode is between the portion of the protective coating and the ceramic substrate.
12 . A system comprising a thermistor assembly, the thermistor assembly including:
a ceramic substrate;
a thermistor element on the ceramic substrate,
a protective coating disposed on the thermistor element so that the thermistor element is between the protective coating and the ceramic substrate; and
a first terminal electrode on the ceramic substrate, wherein an angle between a surface of the first terminal electrode facing the protective coating and a surface of the protective coating facing the first terminal electrode is greater than 90 degrees.
13 . The system of claim 12 , further comprising:
a conductive layer having a first portion separated from a second portion; and
a first solder layer between the first portion of the conductive layer and the first terminal electrode.
14 . The system of claim 13 , wherein the thermistor assembly further includes a second terminal electrode on the ceramic substrate, the second terminal electrode separated from the first terminal electrode by the protective coating.
15 . The system of claim 14 , wherein the system further comprises a second solder layer between the second portion of the conductive layer and the second terminal electrode.
16 . The system of claim 12 , wherein a portion of the first terminal electrode overlaps a portion of the protective coating so that the portion of the protective coating is between the portion of the first terminal electrode and the ceramic substrate.
17 . The system of claim 12 , wherein a portion of the protective coating overlaps a portion of the first terminal electrode so that the portion of the first terminal electrode is between the portion of the protective coating and the ceramic substrate.
18 . The system of claim 12 , wherein the protective coating and the first terminal electrode do not overlap on the ceramic substrate.
19 . The system of claim 12 , wherein a portion of the protective coating and a portion of the first terminal electrode connect at a connection interface.
20 . The system of claim 12 , wherein the first terminal electrode includes a softened material.