Self-heating power battery system and driving heating method

Abstract

The invention provides a self-heating power battery system and a driving heating method, and relates to the technical field of automobiles, the self-heating power battery system comprises a battery module, and the battery module is connected with a self-heating module, a switch module and a battery management module; the battery module is used for providing driving power for the automobile and providing heating power for the self-heating module; the self-heating module is used for converting part of energy of the battery module into heat energy and providing the heat energy for the battery module; the switch module controls starting and stopping of the self-heating module; the battery management module monitors the state of the battery module in real time, including battery monomer voltage, battery monomer temperature, battery module voltage, battery module temperature and battery module residual electric quantity; and according to the monitoring condition, the switch module is judgedand controlled to be switched on and off and perform safety alarm. The self-heating of the power battery system is controlled by detecting the state of the battery module and identifying the driving intention of a driver, so that the driving power demand and the heating power demand are both considered while the vehicle is driven and heated.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a self-heating power battery system and a driving heating method. Background technique [0002] As the core component of new energy vehicles, the power battery module's performance and safety directly affect the power and safety of the vehicle. [0003] However, the performance of power batteries is seriously attenuated in low temperature environments, and side reactions such as lithium precipitation occur, which reduces the mileage of the vehicle and reduces the safety of batteries, which seriously restricts the promotion and development of new energy vehicles in low temperature areas. Therefore, low-temperature heating technology for power battery modules is necessary. [0004] At present, there are two main solutions to solve the low-temperature adaptability of power batteries. One is to use low-temperature materials to manufacture batteries and improve the low-temperatur...

AI Technical Summary

Problems solved by technology

[0005] First, the current electric vehicles with battery heating function mainly use heating plates, PTC materials, heating films, etc. to heat the entire battery pack outside, and use external energy

This method has long heating time, high cost, low efficiency and complex structure

The high cost caused by complex heating system and external energy is unacceptable to consumers

[0006] Second, the long heating time of the power battery system is the main pain point of the current electric vehicle industry, and there is still a lack of reliable solutions

In addition, it is necessary to develop an easy-to-implement, high-reliability driving heating method for the industry pain point of long waiting time for low-temperature heating of electric vehicles

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