Method for controlling battery heating in charging mode

A technology of battery heating and charging mode, applied in secondary battery charging/discharging, batteries, secondary batteries, etc., can solve problems such as battery damage, and achieve the effects of strong conductivity, fast speed, and reduced damage
CN103682525AInactive Publication Date: 2014-03-26HUIZHOU EPOWER ELECTRONICS
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HUIZHOU EPOWER ELECTRONICS
Publication Date
2014-03-26
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a method for controlling battery heating in a charging mode. A charging system is employed and comprises a charger, a battery management system and a heater, wherein the charger comprises a first output end and a second output end; the first output end is connected with a charged battery by a charge relay; and the second output end is connected with the heater by a heating relay. According to the method, a specific temperature value is set; when the mean temperature of the battery is in different temperature intervals, the charger changes working states flexibly, so that the battery is charged only under the conditions of the appropriate temperature and the stable state; the heating is required to be controlled at the too low temperature; and the battery is charged after cooled for a period of time at the excess temperature. The strong conductivity of the battery can be maintained, the ionic diffusion speed is high, so that the damage to the battery caused by charging at the low temperature is reduced, and the influence on the battery charging when the state of the battery is unstable can be avoided.
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Description

technical field

[0001] The invention relates to charging control, in particular to a method for controlling battery heating in charging mode. Background technique

[0002] For the current lithium iron phosphate battery used in electric vehicles, the conductivity at low temperature is relatively poor, and the diffusion speed of lithium ions is relatively slow, which requires that the battery cannot be directly charged at low temperature, and the battery must wait for the temperature to rise. The battery can only be charged after it comes up, otherwise it will have a great impact on the life of the battery.

[0003] From the above situation, when the battery is charged at low temperature, the battery must be heated first, so that the conductivity of the battery is enhanced, and the speed of lithium ion diffusion is relatively accelerated, thereby reducing the damage to the battery caused by charging at low temperature . However, the current heating control methods for rechar...

Claims

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