Battery charging control system and method
A battery charging and control system technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of long charging time, false high display SOC, prolonged charging time, etc., to improve charging efficiency, simple control system, The effect of reducing the charging time
Active Publication Date: 2021-08-17
DONGFENG MOTOR GRP
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Problems solved by technology
For this stepped charging method, although it can accelerate the charging speed of the battery, it brings a new technical problem, that is, the battery is in the charging range between 95% and 100% at the end of charging, considering the SOC calculation accuracy and During the charging process, due to battery polarization and other reasons, it is easy to display a falsely high SOC (95%-100%) at the charging end, so that the charging current at the charging end will jump to a small rate charging in advance, resulting in a prolonged charging time, especially Under high temperature or low temperature conditions, it is often prone to the problem of long charging time
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[0026] Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.
[0027] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", " The orientation or positional relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus...
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The invention relates to the technical field of battery charging control, in particular to a battery charging control system and method. The system comprises a charging interval division module and a charging rate acquisition module which are used for acquiring a charging interval section where a current battery SOC value is located and acquiring a corresponding charging rate according to the charging interval section; a voltage following strategy judgment module which is used for judging whether a voltage following strategy is started or not according to the theoretical voltage and the actual voltage corresponding to the current battery SOC value when the battery SOC value exceeds a set value; a voltage following strategy implementation module which is used for reducing the rising speed of the SOC of a battery under the charging condition of the charging rate of the section when the voltage following strategy is started; and a control module which is used for acquiring the charging rate of the current charging interval to charge the battery, wherein the set value is less than 95%. According to the present invention, the battery charging control system is extremely simple, the problem of low end charging efficiency caused by the virtual high SOC value of the battery can be effectively avoided, the end charging efficiency is improved, and the charging time is shortened.
Description
technical field [0001] The invention relates to the technical field of battery charging control, in particular to a battery charging control system and control method. Background technique [0002] At present, the constant current constant voltage (CC-CV) charging method is widely used for lithium-ion power batteries. First, use a constant current (CC) to charge the battery. When the battery voltage reaches the charging cut-off voltage, use constant voltage charging (CV), and the charging current gradually decreases. When the battery charging current decreases to a certain value, the charging End. This charging method is easy to control. In the constant voltage stage, the polarization voltage and ohmic voltage are reduced, and the battery can be fully charged, but the charging time is too long, and the impact on battery life is not clear, which has become a limit to the further promotion of electric vehicles. The technical bottleneck of the application. [0003] In order ...
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Login to View More IPC IPC(8): H02J7/00
CPCH02J7/007182Y02T10/7072
Inventor 田中熊健朱立宾吴杰余刘爽
Owner DONGFENG MOTOR GRP