Combined BMS, charger, and DC-DC in electric vehicles
A controller of an electric vehicle is disclosed. The controller includes: a BMS LV module configured to manage a low voltage battery; a BMS HV module configured to manage a high voltage battery; a DC-DC module configured to control a plurality of DC-DC FETs; and an ampSwitch module configured to detect a short on a bus and switch to an open state, and further configured to command the DC-DC module or an alternator to match the low battery's voltage and switch to a closed state when voltage returns to normal.
1. A controller comprising:
a BMS LV module configured to manage a low voltage battery;
a BMS HV module configured to manage a high voltage battery;
a DC-DC module configured to control a plurality of DC-DC FETs; and
an ampSwitch module configured to detect a short on a bus and switch to an open state, and further configured to command the DC-DC module or an alternator to match the low battery's voltage and switch to a closed state when voltage returns to normal.
2. The controller of claim 1 , further comprising:
an OBC module configured to control a plurality of OBC FETs or IGBT by referencing a current setpoint provided by a wall-power limit and a limit of the high voltage battery.
3. The controller of claim 1 , further comprising:
a PTC module configured to determine torque limits of a powertrain system to control both longitudinal and lateral movements of a vehicle.
4. The controller of claim 1 , further comprising:
an FC module configured to manage opening and closing a plurality of FC contactors.
5. The controller of claim 1 , further comprising:
an ADC module configured to monitor analog signals and employee digital filter techniques for signals from at least one of a current sensor, low voltage battery voltage and temperature sensor, and pedal monitor position sensor of a brake or accelerator pedal.
6. A combined battery management system, charger, and direct current converter (BCD) for an electric vehicle, comprising:
a main controller comprising:
a BMS LV module configured to manage a low voltage battery;
a BMS HV module configured to manage a high voltage battery;
a DC-DC module configured to control a plurality of DC-DC FETs; and
an ampSwitch module configured to detect a short on a bus and switch to an open state, and further configured to command the DC-DC module or an alternator to match the battery's voltage and switch to a closed state when voltage returns to normal.
7. The BCD of claim 6 , further comprising a low voltage current sensor configured to measure current of a low voltage battery of the electric vehicle.
8. The BCD of claim 7 , wherein the low voltage current sensor comprises:
a first current sensor configured to detect a short-circuit failure of a first 12V bus connecting the BCD to the low voltage battery; and
a second current sensor configured to detect a short-circuit failure of a second 12V bus connecting the BCD to the low voltage battery.
9. The BCD of claim 7 , wherein the low voltage current sensor comprises a fuse and contactor.
10. The BCD of claim 6 , further comprising an OBC; and
wherein the main controller further comprises an OBC module configured to control the OBC.
11. The BCD of claim 10 , wherein the OBC comprises a plurality of OBC FETs or IGBT; and wherein the OBC module controls the OBC by referencing a current setpoint provided by a wall-power limit and a limit of the high voltage battery.
12. The BCD of claim 11 , wherein the OBC is a bi-directional OBC.
13. The BCD of claim 11 , wherein the OBC is connected to a charge connector of the electric vehicle.
14. The BCD of claim 6 , further comprising a single direct current converter (DC-DC) configured to charge the low voltage battery from a high voltage battery.
15. The BCD of claim 6 , further comprising an ampSwitch comprising back-to-back FETs, the ampSwitch controlled by the ampSwitch module of the main controller.
16. The BCD of claim 6 , further comprising a high voltage current sensor configured to measure current of a high voltage of the electric vehicle.
17. The BCD of claim 6 , wherein the main controller further comprises:
a PTC module configured to determine torque limits of a powertrain system to control both longitudinal and lateral movements of a vehicle.
18. The BCD of claim 6 , wherein the main controller further comprises:
an FC module configured to manage opening and closing a plurality of FC contactors.
19. The BCD of claim 6 , wherein the main controller further comprises:
an ADC module configured to monitor analog signals and employee digital filter techniques for signals from at least one of a current sensor, low voltage battery voltage and temperature sensor, and pedal monitor position sensor of a brake or accelerator pedal.