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Method for managing the temperature of a battery of an electric or hybrid vehicle

A hybrid vehicle and storage battery technology, applied in electric vehicles, vehicle energy storage, secondary batteries, etc., can solve problems such as excessive consumption, overheating, and maintenance

Inactive Publication Date: 2016-02-03
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is that these thresholds are constant over time, i.e. not dependent on driving style
As a result, it can lead to overconsumption when the driver is driving gently and overheating when the driver is driving aggressively

Method used

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  • Method for managing the temperature of a battery of an electric or hybrid vehicle
  • Method for managing the temperature of a battery of an electric or hybrid vehicle
  • Method for managing the temperature of a battery of an electric or hybrid vehicle

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Embodiment Construction

[0047] Briefly, the term "motor vehicle" refers to any electric or hybrid motor vehicle.

[0048] Each motor vehicle includes at least one battery, herein "a" or "the" battery.

[0049] Every motor vehicle includes a device, here a "thermal system", for cooling or heating the battery.

[0050] The state of charge SOC of a battery is typically expressed as a percentage of charge, with 100% corresponding to a battery charged to its maximum capacity and 0% corresponding to a fully discharged battery.

[0051] In the management of the battery temperature of a motor vehicle presented here, the aim is to regulate:

[0052] - the temperature Ts at which the thermal system is triggered to cool or heat the battery; or

[0053] - The power output by the thermal system, eg via ventilation airflow or temperature.

[0054] Record the trigger threshold temperature Ts in the memory. When the actual battery temperature crosses this threshold temperature Ts, cooling or possibly heating of ...

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Abstract

The invention relates to a method for managing the temperature of a battery of an electric or hybrid vehicle, which includes recording a temperature value (Ts) at which the cooling or heating of the battery is triggered. The method is essentially characterised in it includes, for two consecutive values in a predefined sequence of states of charge (SOC (i), SOC (i-x)): a step of comparing a real gradient ((dT / dSOC)_real) to a reference gradient ((dT / dSOC)_target) of the battery temperature; and a step of modifying, depending on the comparison, the value of the trigger temperature (Ts), or the value of the power output by means for cooling or heating the battery; and also includes applying the modified trigger temperature (Ts) or output power for the following two consecutive values of the state of charge of the battery (SOC(i-x), SOC(i-2x)) in the predefined sequence.

Description

technical field [0001] The present invention relates to the field of thermal regulation of batteries of motor vehicles, in particular rechargeable electric or hybrid vehicles (PHEVs of plug-in hybrid electric vehicles), the batteries of which can be hooked up to a conventional electric network Charging is performed on external energy sources connected to different types of charging points. Background technique [0002] For this type of vehicle, battery performance is very sensitive to its operating temperature. The operating temperature of the battery depends on the outside temperature, but also on other parameters such as, for example, the driving of the driver. [0003] Batteries are not durable at low temperatures. In other words, in the charging phase, the charging time of the battery is longer and the charging energy is less; in the discharging phase, the autonomy of the battery is small, and the performance of the battery decreases (in this case, the battery especia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H01M10/633H01M10/625
CPCB60L2240/545B60L2260/44B60L58/12B60L58/26B60L58/27H01M10/625H01M10/633Y02E60/10Y02T10/70B60L58/25
Inventor C·马沙尔P·勒库夫勒尔
Owner RENAULT SA