Cooling system for an electrically driven vehicle

Patent metadata

Field	Value
Publication number	US-10113473-B2
Application number	US-201214238595-A
Country	US
Kind code	B2
Filing date	Jul 3, 2012
Priority date	Aug 17, 2011
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A cooling system for an electrically driven motor vehicle, including a central computing unit, a cooling circuit including at least a pump for circulation of a coolant fluid, a solenoid valve, and a radiator. The cooling circuit is configured for cooling a battery charger and an electrical motor connected to an electronic control device. The central computing unit is configured to manage activation of each pump, including potential faults of each of the pumps.

First claim

The invention claimed is:

1. A cooling system for a motor vehicle including electrical propulsion, comprising:
a central processing unit;
a cooling circuit comprising at least one pump for circulating a coolant;
a solenoid valve; and
a radiator;
the cooling circuit configured to cool a battery charger and an electric motor associated with an electronic control device;
wherein the central processing unit is configured to receive diagnostic information including a partial failure status for said at least one pump and phase of use information indicating a phase of use of the vehicle, and manage activation of each pump based on the received diagnostic information and phase of use information, which includes optimizing use of said-partial failure status of each of the pumps.

2. The cooling system as claimed in claim 1 , wherein the central processing unit implements cooling control methods, to manage a high temperature of at least the battery charger and electric motor, or to implement sleep denial phases of the central processing unit.

3. The cooling system as claimed in claim 1 , wherein the cooling circuit comprises a first pump used in running mode, and a second pump used in battery recharging mode, wherein a flow rate of each of the first and second pumps is set by a specific control signal delivered by the central processing unit.

4. The cooling system as claimed in claim 3 , wherein the specific control signal for the first and the second pumps comprises a pulse width modulation signal.

5. The cooling system as claimed in claim 1 , further comprising at least one regulator.

6. The cooling system as claimed in claim 1 , wherein optimizing use of said partial failing status of each of the pumps is performed without risk of further damaging each pump with said partial failing status.

7. A cooling system for a motor vehicle it electrical propulsion, comprising:
a central processing unit;
a cooling circuit comprising at least one pump for circulating a coolant;
a solenoid valve; and
a radiator;
the cooling circuit configured to cool a battery charger and an electric motor associated with an electronic control device;
wherein the central processing unit is configured to receive diagnostic information including a partial failure status for said at least one pump, and manage activation of each pump based on the received diagnostic information, which includes optimizing use of said partial failure status of each of the pumps,
wherein the central processing unit implements cooling control methods, to manage a high temperature of at least the battery charger and electric motor, to implement sleep denial phases of the central processing unit, and
wherein the cooling control methods implemented by the computing central processing unit are implemented by a first computing module responsible for creating a coolant flow rate command regardless of a phase of use of the vehicle, and a second computing module integrating failure modes of each pump based on said diagnostic information and by taking into account the phase of use of the vehicle.

8. The cooling system as claimed in claim 7 ,
wherein input parameters of the first and second computing modules comprise temperature of the coolant used to cool the electric motor, temperature of the coolant used to cool the charger, internal temperature of the charger, internal temperature of the motor, internal temperature of an electronic control device of the motor, a signal indicating status of the vehicle, a failure synthesis signal for each pump, and a signal that reflects denial or acceptance of putting the central processing unit to sleep, and
wherein output parameters of the two modules are, for each pump, a cooling setpoint which is expressed as a percentage of a maximum flow rate that can be produced thereby.

9. The cooling system as claimed in claim 7 , wherein the second computing module is configured to process three possible configurations for each pump, comprising: normal operation, degraded mode operation, and non-operation.

10. The cooling system as claimed in claim 8 , further comprising sensors configured to measure the temperatures used as input data for the modules.

Assignees

• Cherouat Hatem
• Cregut Samuel
• Renault Sas

Inventors

• Cherouat Hatem
• Cregut Samuel

Classifications

• B60K2001/005

  the electric storage means · CPC title

• B60K2001/003

  with means for cooling the electrical propulsion units · CPC title

• F01P3/20 Primary

  Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) · CPC title

• F01P2023/08

  Microprocessor; Microcomputer · CPC title

• B60K2001/006

  the electric motors · CPC title