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Vehicle hvac and battery thermal management

A HVAC system and battery technology, applied in vehicle components, vehicle energy storage, secondary batteries, etc., can solve problems such as low heat dissipation, and achieve the effect of longest battery life

Active Publication Date: 2009-10-07
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these systems have disadvantages such as: low heat removal due to the low heat transfer coefficient of the air, noise, vibration and harshness (NVH) of the interior cabin due to battery fan motor noise and air jet noise, in limited battery cooling capacity after the vehicle has been parked in the sun (due to high air temperatures in the passenger compartment at the start of a drive cycle), and ensuring that the air intake grille between the passenger compartment and the battery thermal system is not accidentally blocked by vehicle occupants ( Difficulties resulting in reduced or no air cooling flow to the battery

Method used

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  • Vehicle hvac and battery thermal management
  • Vehicle hvac and battery thermal management
  • Vehicle hvac and battery thermal management

Examples

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Embodiment Construction

[0012] refer to figure 1 , a portion of a vehicle, generally indicated at 20 , includes a vehicle HVAC system 22 . The HVAC system 22 includes an air conditioning section 24 having a refrigerant circuit 26 . The refrigerant circuit 26 includes a refrigerant compressor 28 in fluid communication with a condenser 30 . The refrigerant compressor 28 may be electrically driven with the ability to adjust the compressor speed (RPMs) during operation. The condenser 30 in turn directs the refrigerant into a refrigerant line 32 which branches into two branches 35, 37 of the refrigerant circuit 26 to direct the refrigerant to the evaporator shut-off valve 34 and Battery cooling cut-off valve 36. The evaporator shutoff valve 34 selectively allows and restricts refrigerant flow therethrough to the evaporator thermal expansion valve 38 . The evaporator thermal expansion valve 38 is in turn in fluid communication with an evaporator 40 located in a heating ventilation air conditioning (HVA...

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PUM

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Abstract

An HVAC system for a vehicle having a battery pack, and a method of operation, is disclosed. The HVAC system may comprise a refrigerant loop having a first leg and a second leg, and a refrigerant compressor in the refrigerant loop. In the first leg, an evaporator provides cooling to a passenger cabin of the vehicle, an evaporator shut-off valve selectively blocks the flow of refrigerant through the evaporator, and an evaporator thermal expansion valve is upstream from the evaporator. In the second leg, a battery heat exchanger receives the refrigerant, a battery thermal expansion valve is located upstream from the battery heat exchanger, and a battery cooling shut-off valve selectively blocks the flow of refrigerant through the battery heat exchanger. The shut-off valves and compressor are controlled to control the cooling of the passenger cabin and the battery pack.

Description

Technical field [0001] The present invention relates generally to heating, ventilation and air conditioning (HVAC) systems in vehicles, and thermal systems for battery packs. Background technique [0002] Advanced motor vehicles are now being promoted that employ battery packs to store large amounts of energy for electric propulsion systems. For example, these vehicles may include plug-in hybrid electric vehicles, electric vehicles with an internal combustion engine that acts as a generator to charge the battery, and fuel cell vehicles. In general, these battery packs require some type of thermal system to cool and warm the battery pack. [0003] Typical battery thermal systems for cooling and warming the battery pack rely on air flow from the vehicle's HVAC system. This could be cabin air directed through the battery pack. However, these systems have disadvantages such as: low heat dissipation due to the low heat transfer coefficient of air, internal cabin noise, vibrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B41/06F25B49/02H01M10/50
CPCY02E60/12H01M10/5004F25B25/005Y02T10/7005H01M10/5016B60L11/1874H01M10/5022B60H2001/00307Y02T10/705F25B2600/025H01M10/5079H01M10/5095H01M10/5077B60H1/00278F25B5/02H01M10/625H01M10/633H01M10/663H01M10/6568H01M10/6569H01M10/613B60L58/26Y02T10/70Y02E60/10
Inventor M·D·内梅什E·J·斯坦克M·J·马丁奇克W·伊布里K·辛格
Owner GM GLOBAL TECH OPERATIONS LLC
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