Low-temperature charge and heating system and method for power battery for all-electric vehicles

A pure electric vehicle, power battery technology, applied in the direction of electric vehicle, secondary battery charging/discharging, secondary battery, etc., can solve the problems of low heating power, prolonged charging time, reduced system efficiency, etc. The effect of shortening heating time and improving system efficiency

Active Publication Date: 2013-12-04
重庆长安新能源汽车科技有限公司
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  • Abstract
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Problems solved by technology

This method has the following problems: (1) The heating power is small, usually lower than 2Kw, and the heating time is too long; (2) The resistance wire is added to the inside of the power battery, so the resistance wire cannot be effectively monitored, and the battery is prone to damage. package security issues
This method has the following problems: (1) The power consumption is the remaining power of the battery, not the power provided by the on-board charger, res

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  • Low-temperature charge and heating system and method for power battery for all-electric vehicles
  • Low-temperature charge and heating system and method for power battery for all-electric vehicles
  • Low-temperature charge and heating system and method for power battery for all-electric vehicles

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[0020] The present invention will be further described below in conjunction with the drawings.

[0021] Such as figure 1 , figure 2 The shown low-temperature charging and heating system for the power battery of a pure electric vehicle includes a vehicle control unit 1, an on-board charger 2, a battery management system 4, a power battery 5, a DC / DC converter 6, a thermal management system 7, and PTC heating An insulation detection circuit 10 is connected in parallel with the vehicle charger 2 and the fan module 9 is composed of a fan and a fan relay that controls the fan to turn on the power. The vehicle control unit 1 communicates with the vehicle charger 2, the battery management system 4, the DC / DC converter 6, the thermal management system 7, and coordinates the vehicle charger 2, the battery management system 4, and the DC / DC converter 6 , The work of the thermal management system 7; the on-board charger 2 is connected with the external power cabinet 3, the PTC heater 8, th...

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Abstract

The invention discloses a low-temperature charge and heating system and method for a power battery for all-electric vehicles. The system comprises a vehicle control unit, a vehicular charger, a battery management system, the power battery, a DC/DC converter, a heat management system, a PTC heater and a fan module. The method includes: during charging, heating is allowed only when the temperature is very low and the temperature T of the power battery is smaller than or equal to 5 DEG C; when the temperature is very low, heating and charging with low current are performed simultaneously; if the temperature T of the power battery is larger than 5 DEG C, low-temperature heating is aborted and a normal charge mode is allowed. The system and the method have the advantages that low-temperature charge and heating time can be shortened, normal charge of the power battery is guaranteed and the service life of the power battery is unaffected.

Description

technical field [0001] The invention belongs to the technical field of pure electric vehicles, and in particular relates to a low-temperature charging and heating system and heating method for power batteries of pure electric vehicles. Background technique [0002] Pure electric vehicles have many advantages such as energy saving and environmental protection, and are the product of the combination of many high and new technologies. With the reduction of energy sources and the vigorous advocacy of the government, they will surely have a broad market in the near future. [0003] Pure electric vehicles can make reasonable use of the advantages of power grid valley power. At present, my country has listed the industrialization of pure electric vehicles as a new energy vehicle industry plan. The key bottleneck affecting the industrialization of pure electric vehicles is the power battery. At present, most of the power batteries of pure electric vehicles use lithium-ion power batt...

Claims

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Application Information

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IPC IPC(8): H01M10/50H01M10/44B60L11/18
CPCY02E60/12Y02T10/7216Y02T10/7005Y02E60/10Y02T10/70Y02T10/72
Inventor 冯超陈平陆中奎李远方嵇黎明
Owner 重庆长安新能源汽车科技有限公司
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