Combined BMS, charger, and DC-DC in electric vehicles
A combined battery management system, charger, and direct current converter (BCD) for an electric vehicle is disclosed. The combined unit includes an enclosure enclosing: an on board charger (OBC); a direct current converter (DC-DC); and a single cold plate thermally coupled to both the OBC and the DC-DC, the single cold plate configured to provide cooling for both the OBC and the DC-DC. The combined unit also includes a plurality of 12V terminal posts on the enclosure, at least one of the plurality of 12V terminal posts for 12V in and at least two of the plurality of 12V terminal posts for 12V outs.
1. A combined battery management system, charger, and direct current converter (BCD) for an electric vehicle, comprising:
an enclosure enclosing:
an on board charger (OBC);
a direct current converter (DC-DC); and
a single cold plate thermally coupled to both the OBC and the DC-DC, the single cold plate configured to provide cooling for both the OBC and the DC-DC; and
a plurality of 12V terminal posts on the enclosure, at least one of the plurality of 12V terminal posts for 12V in and at least two of the plurality of 12V terminal posts for 12V outs.
2. The BCD of claim 1 further comprising a first high voltage connector for a charge connector.
3. The BCD of claim 2 further comprising a second high voltage connector for a high voltage (HV) out.
4. The BCD of claim 1 further comprising a coolant in connection and a coolant out connection.
5. The BCD of claim 1 further comprising a controller on the OBC.
6. The BCD of claim 1 further comprising a controller on the DC-DC.
7. The BCD of claim 1 further comprising a ribbon cable that wraps around the single cold plate and configured to handle communications between the OBC and the DC-DC.
8. The BCD of claim 1 wherein the single cold plate can be thermally coupled to a bus bar of contactors used for fast charging.
9. The BCD of claim 1 further comprising power magnetic components that are wound utilizing a square profile wire.
10. The BCD of claim 1 , wherein the single cold plate comprising two aluminum pieces sealed with a gasket.
11. The BCD of claim 10 , wherein the single cold plate comprising one or more channels to pipe coolant through.
12. The BCD of claim 11 , wherein the one or more channels have widths optimized for reducing Eddy currents.
13. The BCD of claim 1 further comprising a low voltage current sensor and a high voltage current sensor.