A vehicle starting system and method based on low-voltage storage battery intelligent management

Abstract

The invention discloses a vehicle starting system and method based on intelligent management of a low-voltage battery, including a battery, an IBS sensor, an engine control system, a vehicle controller and a DC / DC converter, and the IBS sensor is used for real-time monitoring of the The battery state information of the storage battery and the voltage drop value information during the process of starting the engine by the 12V starter; the engine control system is used to receive the battery state information and the voltage drop value information and feed them back to the vehicle controller; The vehicle controller is configured to adjust the charging power / voltage of the battery by the DC / DC converter in real time, and control the SOC of the battery to meet a preset SOC threshold. Adoption of the present invention can also ensure the SOC of the storage battery and the starting ability of the 12V starter to start the engine after the load of the whole vehicle is in dynamic change and the performance of the storage battery is attenuated for a long time.

Description

technical field [0001] The invention relates to the technical field of vehicle management, in particular to a vehicle starting system and method based on intelligent management of low-voltage storage batteries. Background technique [0002] With the rapid development of new energy vehicles, people's demand for hybrid vehicles is also increasing. A hybrid vehicle has a pure electric driving mode, a hybrid driving mode and a pure generator driving mode, and the switching between each driving mode involves the start and stop of the engine. The mode of controlling the engine start of the hybrid electric vehicle can be further divided into the motor pull-up mode, the driving inertia pull-up mode and the starter start-up mode. When the high-voltage system failure occurs in the hybrid vehicle control engine vehicle, the hybrid vehicle will switch to the pure engine driving mode and use the starter start mode to start the engine. [0003] The starter can convert the electrical ene...

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, aiming at the above problems, the present invention generally judges the 12V start-up capability of the battery based on the battery terminal voltage collected by the relevant controllers such as the engine control system and the vehicle controller in the existing market technical solutions. There is a large deviation in the dynamic change process of the load or when the performance of the battery is attenuated after long-term use, the charging voltage of the battery cannot be corrected in time according to the information and the 12V start-up ability cannot be accurately judged

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