Shunt resistor for measuring current
View Patent ↗Disclosed is a shunt resistor for measuring current, and a shunt resistor for measuring current, in which one or more protrusions having an unevenness shape, which are formed on one lateral surface of a shunt resistor and one or more solders are bonded to each other, respectively and the shunt resistor and a printed circuit board are electrically connected to each other to measure current of a battery through a shunt resistance included in the shunt resistor unit.
1. A shunt resistor assembly for measuring current, the shunt resistor assembly comprising:
a shunt resistor unit including a resistive element having a resistance value;
a printed circuit board (PCB) included in a battery module and electrically connected with the shunt resistor unit to provide a voltage value of the battery module to the resistive element to measure current of the one or more batteries included in a battery module based on the resistive value of the resistive element, wherein the shunt resistor unit is connected to first and second terminals formed in the one or more batteries;
first and second protrusions formed on a lateral surface of the shunt resistor unit facing the PCB and connected to the first and second terminals, respectively, wherein each of the first and second protrusions is formed in an uneven shape having crevices; and
first and second solder connections connecting the first and second terminals of the PCB to the first and second protrusions formed on the shunt resistor unit, respectively, wherein the first and second solder connections, when in a melted state, flow between the crevices of the first and second protrusions in order to bond to and connect the shunt resistor unit to the PCB.
2. The shunt resistor of claim 1 , wherein the crevices formed in the protrusion has at least one of a polygonal shape or a semicircular shape.
3. The shunt resistor of claim 2 , wherein a quantity and type of solder included in the first and second solder connections is selected based on a shape of the crevices in the first and second protrusions.
4. The shunt resistor of claim 1 , wherein the first and second protrusions are formed on the lateral surface of the shunt resistor unit through a pressing process.
5. The shunt resistor of claim 1 , wherein the first and second solder connections are formed by reflow-soldering through a surface mounting technology (SMT) process for bonding the PCB to the first and second protrusions.
6. The shunt resistor of claim 1 , wherein the PCB is configured to diagnose a state of the battery module based on the measured current of the one or more batteries.