Electric trolley battery heating method

A battery heating and electric vehicle technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of battery damage and the influence of temperature difference of battery cells, etc., and achieve the effect of ensuring reliability

Active Publication Date: 2012-10-03
ROYPOW TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heater is controlled by the micro-control MCU unit. At present, the MCU generally only controls the temperature point at which the heater is turned on and off, and the temperature point is determined by the minimum temperature in the battery unit, without considering the influence of the temperature difference bet

Method used

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  • Electric trolley battery heating method
  • Electric trolley battery heating method
  • Electric trolley battery heating method

Examples

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Embodiment Construction

[0016] The electric vehicle battery heating method of the present invention will be further described in detail in conjunction with specific embodiments and accompanying drawings.

[0017] The electric car battery heating method of the present invention is suitable for electric car batteries, especially a battery pack composed of a plurality of single lithium ion batteries connected in series and parallel. We know that the charging current of a lithium battery is closely related to the temperature. For example, when the battery temperature is lower than 0°C, the lithium ion battery cannot be charged. Therefore, the problem of how to fully charge the lithium-ion battery pack in a short time has actually turned into a problem of how to raise the temperature of the battery to an acceptable high-current charging range in a short time. The invention adopts the control strategy of heating the battery pack with a heater and using a fan to assist in the balanced distribution of heat, ...

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Abstract

The invention relates to an electric trolley battery heating method. The heating method comprises the following steps: a temperature sensor on each battery unit of a battery group obtains the temperature of each battery unit; when minimum temperature of each battery unit is less than a first presupposition value, a battery control unit controls a heater to heat the battery group; when the temperature difference between any two battery units is greater than a second presupposition value, the battery control unit controls the operation of a fan, and the temperature in the battery group tends to be uniform; and when the minimum temperature of each battery unit is greater than the fourth presupposition value, the battery control unit controls the heater to stop operating, and the fourth presupposition value is greater than the first presupposition value. The electric trolley battery heating method provided by the invention guarantees that the minimum temperature of the battery group is not lower than the first presupposition value and simultaneously the maximum temperature of the battery group is not beyond the dangerous line, ensures the reliability of each battery and simultaneously enables the temperature of the battery group to maintain in a proper temperature range, and the battery group is fully charged.

Description

technical field [0001] The invention relates to a battery system of an electric vehicle, in particular to a heating method for an electric vehicle battery. Background technique [0002] With the development and application of new energy sources, the development of dual-source trolleybuses using lithium batteries as auxiliary drive power is becoming more and more mature. When the dual-source trolleybus is driving, most of the time it uses the DC power grid erected in the city as the driving power source. However, in some places where the power grid is not erected due to various reasons, the power battery pack carried by the tram must be used to provide power. Considering the cost and the difference between trams and pure electric vehicles, trams generally do not carry high-power battery packs. Therefore, in order to ensure that trams can run normally on ungrid sections, it is necessary to ensure that the energy of the battery packs is used during the grid-connected journey. ...

Claims

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Application Information

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IPC IPC(8): H01M10/50H01M10/615H01M10/625H01M10/633H01M10/637H01M10/6563
CPCY02E60/12Y02E60/10
Inventor 刘飞文锋阮旭松樊耀国
Owner ROYPOW TECH CO LTD
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