SUPPLYING POWER TO AN ELECTRIC VEHICLE
A power supply system that utilizes a hybrid architecture to enable low cycle-life, high energy density chemistries to be used in rechargeable batteries to extend the range of a traction battery.
1 . A battery system for an electric vehicle, comprising:
a traction battery module having a cell energy density of 500 Wh/L or less;
a hybrid battery module having a cell energy density of at least 1000 Wh/L; and
a battery management system arranged and configured to provide power to a drive unit of an electric vehicle from the traction battery module, the hybrid battery module, or a combination thereof, based upon a power requirement of the electric vehicle.
2 . The battery system of claim 1 , wherein the hybrid battery module comprises a first set of cells having a different cell chemistry than cells in the traction battery module, the set of cells comprising one or more cells.
3 . The battery system of claim 2 , wherein:
the hybrid battery module comprises a plurality of sets of cells, each set of the plurality having a different cell chemistry than cells in the traction battery module; and
each set of the plurality has a different cell chemistry than other sets of cells in the hybrid battery module.
4 . The battery system of claim 2 , wherein the hybrid battery module comprises cells having at least three different cell chemistries.
5 . The battery system of claim 1 , wherein the hybrid battery module provides power to the electric vehicle based on an energy state of the traction battery module.
6 . The battery system of claim 1 , further comprising one or more hybrid battery module controllers configured to manage a charge and/or discharge of cells in the hybrid battery module.
7 . The battery system of claim 6 , wherein each of the one or more hybrid battery module controllers comprises a DC-DC converter.
8 . The battery system of claim 1 , wherein the battery management system is further configured to provide power from the second battery module to the first battery module to charge the first battery module.
9 . The battery system of claim 1 , wherein the second battery module has a cell energy density of at least 1100 Wh/L.
10 . The battery system of claim 1 , wherein the second battery module has a cell energy density of at least 1200 Wh/L.
11 . The battery system of claim 1 , wherein the first battery module has a cell energy density of 400 Wh/L or less.
12 . The battery system of claim 1 , wherein the first battery module has a cell energy density of 300 Wh/L or less.
13 . An electric vehicle comprising:
a traction battery module having a cell energy density of 500 Wh/L or less;
a hybrid battery module having a cell energy density of at least 1000 Wh/L; and
a battery management system arranged and configured to provide power to a drive unit of an electric vehicle from the traction battery module, the hybrid battery module, or a combination thereof, based upon a power requirement of the electric vehicle.
14 . The electric vehicle of claim 13 , wherein the hybrid battery module comprises a first set of cells having a different cell chemistry than cells in the traction battery module, the set of cells comprising one or more cells.
15 . The electric vehicle of claim 14 , wherein:
the hybrid battery module comprises a plurality of sets of cells, each set of the plurality having a different cell chemistry than cells in the traction battery module; and
each set of the plurality has a different cell chemistry than other sets of cells in the hybrid battery module.
16 . The electric vehicle of claim 14 , wherein the hybrid battery module comprises cells having at least three different cell chemistries.
17 . The electric vehicle of claim 13 , further comprising one or more hybrid battery module controllers configured to manage a charge and/or discharge of cells in the hybrid battery module.
18 . The electric vehicle of claim 17 , wherein each of the one or more hybrid battery module controllers comprises a DC-DC converter.
19 . The electric vehicle of claim 13 , wherein the second battery module has a cell energy density of at least 1100 Wh/L.
20 . The electric vehicle of claim 13 , wherein the first battery module has a cell energy density of 400 Wh/L or less.