Method and system for realizing active balancing of new energy vehicle batteries by using wireless charging

Abstract

The invention provides a method using wireless charging to achieve new energy automobile battery active equalization and data command transmission and a system using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission. The system using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission comprises a battery management system, a battery pack and a low-voltage battery, wherein the battery pack is a high-voltage battery module formed by single batteries connected in series. Each single battery, the battery management system and the low-voltage battery are all provided with a circuit which can receive and transmit wireless power and data commands. Each circuit comprises a microprocessor, an input and output circuit, a battery information collecting circuit, a series resonant circuit and the like. All coils are located in the same electric field or magnetic field. The method using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission is a cheap, reliable and efficient battery pack battery bi-direction active equalization energy conversion method. By using the method using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission, single battery information can be transmitted to a battery managing device, and the battery managing device can send electric energy transfer commands to all single batteries.

Description

technical field [0001] The invention relates to the field of battery equalization, in particular to a method and system for achieving the purpose of active battery equalization of new energy vehicles by means of wireless charging. Background technique [0002] With the increasing shortage of oil resources, the development of new energy vehicles has received more and more attention from major car manufacturers. New energy vehicles refer to all other energy vehicles except gasoline and diesel engines. Including fuel cell vehicles, hybrid vehicles, hydrogen energy vehicles and solar vehicles. Batteries are an important component for new energy vehicles. In new energy vehicles, in order to obtain a larger power supply, the method of connecting batteries in series is usually used to form a battery pack (or battery pack). When charging and discharging a group of batteries, taking into account the inconsistency of individual batteries, equalization measures are generally adopted...

AI Technical Summary

Problems solved by technology

Battery balancing can be divided into passive balancing and active balancing. Passive balancing refers to dissipating the excess power of a high-voltage single battery through resistor discharge or other forms. The implementation of passive balancing is simple, but there are certain insecurities. factors, and is not conducive to energy saving and environmental protection; active equalization refers to returning part of the power of the high-voltage single battery to the battery circuit through the conversion device or directly to the low-voltage battery

It is common to use transformers to achieve high-voltage and low-voltage electrical isolation and power conversion in active equalization solutions. However, due to temperature-sensitive materials, large volume, and heavy weight, transformers are not very suitable for environments with large temperature differences and strong vibrations such as automobiles.

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