Charging and heating method and system of charging-type hybrid electric vehicle power battery

Abstract

The invention provides a charging and heating method and system of a charging-type hybrid electric vehicle power battery, and belongs to the technical field of hybrid electric vehicles. The problem ofprolonging the whole charging process of the vehicle power battery at a low temperature in the prior art is solved. The charging and heating method of the charging-type hybrid electric vehicle powerbattery includes the following steps that A, charging is started; B, whether heating is needed or not is judged; C, heating control is carried out; and D, heating is quitted. The charging and heatingsystem of the charging-type hybrid electric vehicle power battery includes a vehicle controller, a relay unit, an air conditioner controller, a charging controller, and a battery manager capable of obtaining continuous rechargeable power of the power battery, wherein the battery manager, the charging controller and the air conditioner controller are connected with the vehicle controller, and the charging controller and relay unit are connected with the battery manager. According to the charging and heating method and system of the charging-type hybrid electric vehicle power battery, time of the whole charging process of the vehicle power battery at the low temperature can be shortened.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and relates to a charging and heating method and system for a power battery of a plug-in hybrid electric vehicle. Background technique [0002] Automobile technology is developing with the development of society. Plug-in hybrid electric vehicle is a new type of hybrid electric vehicle, which can be charged externally, and combines traditional power system with pure electric power system to make up for their respective disadvantages. [0003] The plug-in hybrid electric vehicle includes a power battery, a storage battery, a vehicle controller, a charger (On-board Charger is abbreviated as OBC) for connecting with a power supply device to rectify the voltage and current output by the power supply device to output direct current, and to obtain The battery manager of the power battery state (BATTERY MANAGEMENT SYSTEM is referred to as BMS), the DCDC converter that converts high-volta...

AI Technical Summary

Problems solved by technology

In order to improve the charging efficiency, the power battery will be heated and recharged. However, the existing technology simply uses a fixed temperature as the power battery heating target temperature. It is easy to cause the temperature of the power battery is not high enough, the charging performance is not enough, and the battery manager requests The charging power is less than the maximum output charging power of the charger, so the power battery can only be charged with the requested charging power, resulting in incomplete utilization of charging resources and reduced charging efficiency

Or as in the "power battery temperature control method and device", it is heated to make the temperature of the power battery in the range of the maximum charging and discharging power. Although the power battery can receive a large power input charge at this time, it is heated to The temperature is in the range of the maximum charging and discharging power, without considering the maximum output charging power of the charger, the heating temperature will be too high, and the charging power requested by the battery manager is much greater than the maximum output charging power of the charger, which is not only easy to damage The power battery, and after heating, the power battery can only work at the maximum output charging power of the current charger, which wastes too much energy and wastes too much heating time, so it will still prolong the entire charging process of the vehicle power battery

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