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Power battery temperature management method of electric automobile

A technology of battery temperature and management method, applied in electric vehicles, secondary batteries, electric traction, etc., can solve the problem that lithium-ion batteries cannot be charged, and achieve the effect of ensuring work stability and avoiding low temperature

Active Publication Date: 2016-07-20
HIGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a low temperature environment, the temperature of the battery will drop to the ambient temperature when the vehicle is not in use, and the lithium-ion battery cannot be charged at this time

Method used

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  • Power battery temperature management method of electric automobile
  • Power battery temperature management method of electric automobile
  • Power battery temperature management method of electric automobile

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0024] Such as figure 1 as shown, figure 1 It is a flowchart of a power battery temperature management method for an electric vehicle, and the method mainly includes:

[0025] The S110 temperature sensor collects the battery and ambient temperature.

[0026] When the battery is in working state, temperature data is detected by temperature sensing probes installed inside and outside the battery, and the temperature management system collects these temperature data.

[0027] S120 Determining working conditions and estimating the temperature change trend adopting strategies

[0028] The management system determines whether the battery is in the p...

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PUM

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Abstract

The invention discloses a power battery temperature management method of an electric automobile. The power battery temperature management method comprises a battery temperature deducing method, a battery temperature optimum work region regulating method, a battery overtemperature prevention management method and a battery undertemperature prevention management method. A management system determines the battery work mode according to the charging and discharging current condition of a battery; the battery temperature change trend of the battery after heat radiation and heating measures are used or when the heat radiation and heating measures are not used is calculated according to the battery heat radiation and heating strategies; the battery heat radiation and heating strategies are selected, so that the battery temperature is maintained in the optimum work region or is similar to the optimum work region. The power battery temperature management method of the electric automobile has the following characteristics that the battery temperature is maintained in the optimum work range to the greatest degree; the use strategies and the heat radiation and heating strategies of the battery are systematically combined, so that the work stability of the battery is guaranteed; except for a special condition that a user cannot realize charging, the condition of automobile charging incapability due to too low temperature can be avoided.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method for managing the temperature of a power battery of an electric vehicle. Background technique [0002] Electric vehicles use batteries as energy storage systems, and the mainstream of batteries currently used are lithium-ion batteries. The performance of lithium-ion batteries is affected by temperature. For example, when the battery is in a low temperature environment, the charge and discharge rate performance and available capacity are greatly reduced, and it is difficult to start at the same time. In a high temperature environment, the life of the battery will drop sharply. After the temperature exceeds 60 degrees, it may cause damage to the SEI film in the lithium-ion battery, resulting in irreversible damage to the battery. When the temperature is higher, the organic solvent in the battery electrolyte will decompose and cause thermal runaway, which may cause safety ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/617H01M10/625H01M10/633H01M10/635B60L11/18
CPCB60L58/10B60L58/24H01M10/4285H01M10/617H01M10/625H01M10/633H01M10/635Y02E60/10Y02T10/70
Inventor 王世强李竞克方兰兰张卫林熊金峰李江李春
Owner HIGER
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