Rechargeable vehicle thermal management charging system

Patent metadata

Field	Value
Publication number	US-2018201152-A1
Application number	US-201715408079-A
Country	US
Kind code	A1
Filing date	Jan 17, 2017
Priority date	Jan 17, 2017
Publication date	Jul 19, 2018
Grant date	—

Abstract

Systems of an electrical vehicle and the operations thereof are provided that control an operating temperature of an on board battery pack using an external thermal management system.

First claim

What is claimed is:

1 . A charging system, comprising:
a rechargeable electric vehicle comprising an interior and exterior, the interior comprising a rechargeable energy storage unit in electrical communication with one or more electric motors to propel the vehicle and a receptacle to receive electrical energy to recharge the energy storage unit, and a first thermal management unit to control an operating temperature of the energy storage unit; an external power source in electrical communication, by the receptacle, with the energy storage unit; a second thermal management unit located outside the rechargeable electric vehicle exterior and in fluid communication with the energy storage unit; and a microprocessor programmed, based on an energy storage unit-related parameter, to control an operating temperature of the energy storage unit by passing a thermal management fluid through at least part of the first thermal management unit or a thermal management fluid recycle loop in fluid communication with the first thermal management unit.

2 . The charging system of claim 1 , wherein the thermal management fluid is a gas or liquid, wherein the second thermal management unit decreases the operating temperature of the energy storage unit during charging by the external power source, wherein the energy storage unit is a battery pack, wherein the energy storage unit-related parameter is one or more of C- and E-rates for the battery pack, stored energy capacity or nominal capacity, energy or nominal energy (Wh for a specific C-rate), cycle life (number for a specific DOD), specific energy, specific power, energy density, power density, maximum continuous discharge current, maximum 30-second discharge pulse current, charge voltage, float voltage, (recommended) charge current, internal resistance, terminal voltage, winding temperature, battery pack voltage level, output electrical current, leakage current, internal battery pack temperature, depth-of-charge, state-of-charge, or state-of-health, and state-of-function, and wherein the thermal management fluid passes through a heat exchanger of the first thermal management unit.

3 . The charging system of claim 1 , wherein the second thermal management unit lowers, by heat transfer to the thermal management fluid, the operating temperature of the energy storage unit during charging, wherein the second thermal management unit comprises one or more of a direct, indirect, or multi-stage evaporative cooler, vapor-compression cycle refrigeration cycle device acoustic cooling device, magnetic cooling device, pulse type cooling device, Sterling cycle cooling device, thermoelectric cooling or thermionic cooling device, vortex tube cooling device, and water cycle cooling device, and wherein a heat exchange medium removes heat from the thermal management fluid via a heat exchanger.

4 . The charging system of claim 1 , wherein the thermal management fluid is a gas or liquid, wherein the second thermal management unit decreases the operating temperature of the energy storage unit during charging by the external power source, wherein the energy storage unit is a battery pack, wherein the energy storage unit-related parameter is one or more of C- and E-rates for the battery pack, stored energy capacity or nominal capacity, energy or nominal energy (Wh for a specific C-rate), cycle life (number for a specific DOD), specific energy, specific power, energy density, power density, maximum continuous discharge current, maximum 30-second discharge pulse current, charge voltage, float voltage, (recommended) charge current, internal resistance, terminal voltage, winding temperature, battery pack voltage level, output electrical current, leakage current, internal battery pack temperature, depth-of-charge, state-of-charge, or state-of-health, and state-of-function, and wherein the thermal management fluid passes through the recycle loop.

5 . The charging system of claim 4 , wherein the microprocessor isolates the first thermal management unit from flow of the thermal management fluid by closing one or more valves in fluid communication with the recycle loop, wherein the thermal management fluid is a liquid, the liquid comprising ethylene glycol, and wherein, in a first operating mode, the thermal management fluid is cooled by the first but not the second thermal management unit and, in a different second operating mode, the thermal management fluid is cooled by the second but not the first thermal management unit.

6 . The charging system of claim 4 , wherein the thermal management fluid removes thermal energy from the energy storage unit and wherein the heated thermal management fluid has a first portion of the removed thermal energy removed by the second thermal management unit, and a second portion of the removed thermal energy removed by the first thermal management unit followed by recycle of the cooled thermal management fluid to the energy storage unit.

7 . The charging system of claim 1 , wherein the second thermal management unit removably attaches to and detaches from the at least part of the first thermal management unit or a thermal management fluid recycle loop and wherein the first or second thermal management unit comprises a mechanism to remove gas bubbles from the thermal management fluid introduced by attachment of the second thermal energy unit.

8 . A method comprising:
electrically connecting an external power source to a rechargeable electric vehicle comprising an interior and exterior, the interior comprising a rechargeable energy storage unit in electrical communication with one or more electric motors to propel the vehicle and a receptacle to receive electrical energy to recharge the energy storage unit, and a first thermal management unit to control an operating temperature of the energy storage unit, wherein the external power source, after electrical connection, is in electrical communication, by the receptacle, with the energy storage unit; and during charging of the energy storage unit by the external power source, passing, by a second thermal management unit located outside the rechargeable electric vehicle exterior and in fluid communication with the energy storage unit, a thermal management fluid through at least part of the energy storage unit to control the energy storage unit temperature, wherein the thermal management fluid passes through at least part of the first thermal management unit or a thermal management fluid recycle loop in fluid communication with the first thermal management unit.

9 . The method of claim 8 , wherein the thermal management fluid is a gas or liquid, wherein the second thermal management unit decreases the operating temperature of the energy storage unit during charging by the external power source, wherein the energy storage unit is a battery pack, wherein the energy storage unit-related parameter is one or more of C- and E-rates for the battery pack, stored energy capacity or nominal capacity, energy or nominal energy (Wh for a specific C-rate), cycle life (number for a specific DOD), specific energy, specific power, energy density, power density, maximum continuous discharge current, maximum 30-second discharge pulse current, charge voltage, float voltage, (recommended) charge current, internal resistance, terminal voltage, winding temperature, battery pack voltage level, output electrical current, leakage current, internal battery pack temperature, depth-of-charge, state-of-charge, or state-of-health, and state-of-function, and wherein the thermal management fluid passes through a heat exchanger of the first thermal management unit.

10 . The method of claim 8 , wherein the second thermal management unit lowers, by heat transfer to the thermal

Assignees

• Nextev Usa Inc

Inventors

• Newman Austin L
• Jensen Thomas P

Classifications

• B60L11/182

  Operations & Transport · mapped topic

• B60L11/1816

  Operations & Transport · mapped topic

• B60L11/1874 Primary

  Operations & Transport · mapped topic

• H02J7/35

  with light sensitive cells · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title