Electric vehicle charging system
AssigneeChargepoint, Inc.
InventorsPaul Baron Guerra, Damian S. Matthews, Pasquale Romano, David Baxter
Life of this patent
Estimating the term…
Abstract
An external electric vehicle battery thermal management system is described. An electric vehicle thermal system provides external coolant to an internal battery thermal system of an electric vehicle. The internal battery thermal system includes a liquid-to-liquid heat exchanger to cool or warm the set of batteries of the electric vehicle. The external coolant is pumped through a first side of the heat exchanger and serves as the source to cool or heat internal coolant pumped through a second side of the heat exchanger. The external coolant and the internal coolant do not mix.
Claims9
A method, comprising:
- receiving, from a battery management system of an electric vehicle, a request for external coolant to change a temperature of a battery of the electric vehicle;
- determining a mass flow rate of cold coolant stored in a cold tank of an electric vehicle thermal system to pump through a first thermal loop of a first side of a liquid-to-liquid heat exchanger located on the electric vehicle, wherein the first thermal loop of the first side of the liquid-to-liquid heat exchanger does not mix with an internal coolant of a second thermal loop of a second side of the liquid-to-liquid heat exchanger located on the electric vehicle;
- causing the determined mass flow rate of the cold coolant to pump through the first thermal loop of the first side of the liquid-to-liquid heat exchanger;
- determining, based at least on a level of cold coolant stored in the cold tank and a level of hot coolant stored in a hot tank, whether to cause coolant returning from the first thermal loop to be cooled and stored in the cold tank or heated and stored in the hot tank;
- and
- causing the coolant returning to be cooled or heated according to the determination.
Dependencies are inferred from the claim text.