Method and system for heating a vehicle battery

A battery and vehicle technology, applied in lithium battery, battery/battery traction, non-aqueous electrolyte battery, etc., can solve problems such as affecting performance, battery unable to fully receive or provide electrical power, increasing battery internal resistance, etc.

Active Publication Date: 2012-10-17
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
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  • Claims
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Problems solved by technology

For example, certain battery types (for example, batteries based on lithium-ion chemistries) can be negatively affected by extremely cold temperatures, which can increase the internal re

Method used

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  • Method and system for heating a vehicle battery
  • Method and system for heating a vehicle battery

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Embodiment Construction

[0042]The methods described herein may be used to heat a vehicle battery, such as the type used for vehicle propulsion in a hybrid electric vehicle (HEV). Depending on the battery chemistry involved, such batteries may not perform well in extremely cold environments. For example, lithium-ion batteries may exhibit high internal resistance when the battery is extremely cold, which in turn may negatively affect the battery's usable power or other capabilities. Reduced battery power may affect electric mode propulsion, hinder regenerative braking, or negatively affect vehicle fuel economy, among other things. Additionally, the power provided by these types of batteries is often used not only for propulsion, but also to operate transmission components such as clutches and gears during shifts and other fast transient events. The drivability of the vehicle may also be negatively affected if the available battery power is significantly reduced. According to an exemplary embodiment, ...

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Abstract

A method and system for heating a vehicle battery, such as the type used for vehicle propulsion in a hybrid electric vehicle (HEV). Depending on the battery chemistry involved, such batteries may not perform well in extremely cold environments. For instance, a lithium-ion battery can exhibit a high internal resistance when the battery is extremely cold, which in turn can negatively affect the available power or other capabilities of the battery. According to an exemplary embodiment, the method and system take advantage of the high internal resistance in a cold vehicle battery by purposely cycling electrical current in and/or out of the battery so that heat is created. This heat warms up the vehicle battery and thereby improves its overall performance and capabilities.

Description

technical field [0001] The present invention relates generally to vehicle batteries, and more particularly to vehicle batteries for vehicle propulsion. Background technique [0002] In hybrid electric vehicles (HEVs), extended-range electric vehicles (EREVs), battery electric vehicles (BEVs) and other types of vehicles that use high voltage batteries for vehicle propulsion, the state or condition of the batteries can be important to vehicle performance . There are many different battery conditions that can affect battery performance, including battery temperature. For example, certain battery types (for example, batteries based on lithium-ion chemistries) can be negatively affected by extremely cold temperatures because such temperatures can increase the internal resistance in the battery. These types of batteries may not be able to receive or deliver electrical power adequately if the battery temperature is cold enough, which in turn may affect its performance. Contents...

Claims

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Application Information

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IPC IPC(8): H01M10/50B60L3/00B60L50/15B60L50/16
CPCH01M10/5026Y02T10/6217Y02T10/7044Y02T90/14Y02T10/7241Y02T10/7016H01M10/052H01M10/5006B60L11/18Y02T10/7005B60L2210/40B60L11/1862H01M10/5022B60L11/14B60L2240/423Y02T10/705H01M10/42B60L11/1875B60L2240/545Y02E60/12H01M2220/20B60L3/00H01M10/5016Y02T10/7011B60L11/123Y02T10/7077Y02T10/642H01M10/50H01M10/625H01M10/615H01M10/637H01M10/633B60L50/61B60L50/16B60L58/13B60L58/27Y02E60/10Y02T10/62Y02T10/70Y02T10/64Y02T10/72Y02T10/7072
Inventor J.R.施瓦茨G.E.史密斯D.R.弗里施I.L.汉娜B.J.科赫
Owner GM GLOBAL TECH OPERATIONS LLC
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