Charging communication protocol framework for electric vehicle and off-board charger and implementation method thereof

Abstract

The invention discloses a charging communication protocol framework for an electric vehicle and an off-board charger and an implementation method thereof. The charging communication protocol framework comprises a plurality of ordered function modules: version negotiation, function negotiation, parameter configuration, authentication, reservation, charging system self-inspection, pre-charging and energy transmission, and charging ending; the charging communication protocol is composed of all necessary function modules and zero or more optional function modules in the framework, and supports one or more application examples of the function modules capable of being reloaded at the same time; different versions of communication protocols can support different option function modules and different application examples of reloading function modules; the vehicle / charger following a certain specific version of communication protocol can realize all / part of functions supported by the version of communication protocol according to own realization conditions and requirements; through version negotiation, function negotiation and flexible configuration of the selectable function module and the reloaded function module, the requirements of the charging communication protocol for compatibility, expansibility and flexibility are met.

Description

technical field [0001] The invention relates to a charging communication protocol framework between an electric vehicle and an off-board charger and an implementation method thereof, belonging to the technical field of electric vehicle communication control. Background technique [0002] In the process of DC charging of electric vehicles, the electric vehicle and the off-board conductive charger exchange charging capability, charging requirements, charging status information, etc. according to the communication protocol followed to ensure the orderly charging process. Therefore, the electric vehicle and off-board charging The charging communication protocol between machines is an indispensable and important part of DC charging. The current international mainstream DC charging systems include China's GB2015, Japan's CHAdeMO, and European and American CCS systems. Different systems follow different charging communication protocols, each with its own characteristics: [0003] ...

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Problems solved by technology

[0003] (1) Japan adopts CHAdeMO 2.0, which is a lightweight communication protocol. It only defines the most basic charging interaction information and is easy to implement. The main problem at present is that it is not easy to expand when there are new charging functions.

[0004] (2) European and American CCS systems adopt the ISO 15118 communication protocol framework. This framework not only supports conductive charging, but also includes various applications such as AC charging, wireless charging, and pantographs. The framework has a wide range of applications, but it also needs to adapt to different applications. Frequent revisions, numerous protocol versions, and because its version negotiation strategy supports charging of vehicles and chargers of different protocol versions, protocol compatibility issues are serious

[0005] (3) GB2015 adopts the GB / T27930 communication protocol standard, defines the charging information interaction process according to the conventional charging requirements, lacks the expansion of new functions and new applications; in addition, GB / T27930 does not have an effective version negotiation strategy, and the version information obtained by both charging parties Asymmetry, the vehicle cannot complete the version identification of the charger, and it is difficult to upgrade the protocol

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