Charging method

A charging method and charging process technology, applied in charging stations, electric vehicle charging technology, current collectors, etc., can solve the problems of capacity attenuation, battery impedance increase, battery aggravated damage, etc., and achieve the effect of delaying damage

Pending Publication Date: 2021-12-31
EVERGRANDE NEW ENERGY AUTOMOTIVE INVESTMENT HLDG GRP CO LTD
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Problems solved by technology

However, during the charging and discharging process in its whole life cycle, the damage of electrode materials and the increase of electrolyte decomposition will eventually lead to the increase of battery impedance and the attenuation of capacity.
[0003] In addition, during the charging process of the power battery, especially the fast charging condition, a large charging current will accelerate the growth of the solid electrolyte interface (Solid Electrolyte Interphase, SEI) film inside the power battery and the rate of loss of active materials, resulting in power loss. The battery capacity decays rapidly. Therefore, in the charging process of the battery life cycle, on the premise of meeting the charging demand, how to delay the aggravated damage to the battery during the charging process has become an important issue facing the new energy industry.

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Embodiment Construction

[0019] The following will clearly describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

[0020] The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally o...

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Abstract

The embodiment of the invention provides a charging method, which comprises the following steps: updating battery parameters based on relevant parameters of battery capacity attenuation, the battery parameters comprising at least one of the following: battery initial capacity, charging cut-off voltage corresponding to the Nth charging process of the battery and first charging current in the Nth charging process, wherein N is a positive integer greater than or equal to 1; and charging the battery for the (N + 1) th time based on the updated battery parameters. According to the embodiment, the damage of the battery is delayed.

Description

technical field [0001] The present application belongs to the technical field of battery charging, and in particular relates to a charging method. Background technique [0002] As the core component of new energy vehicles, the power battery has a direct impact on the performance of the vehicle. However, during the charging and discharging process in its whole life cycle, the damage of electrode materials and the increase of electrolyte decomposition will eventually lead to the increase of battery impedance and the attenuation of capacity. [0003] In addition, during the charging process of the power battery, especially the fast charging condition, a large charging current will accelerate the growth of the solid electrolyte interface (Solid Electrolyte Interphase, SEI) film inside the power battery and the rate of loss of active materials, resulting in power loss. The battery capacity has declined rapidly. Therefore, in the charging process of the battery life cycle, how to...

Claims

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Application Information

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IPC IPC(8): H02J7/00B60L53/62B60L58/12B60L58/24
CPCH02J7/00032H02J7/0048H02J7/0071H02J7/007182H02J7/007194B60L53/62B60L58/12B60L58/24Y02T10/70Y02T10/7072Y02T90/12
Inventor 田艳峰胡德鹏姚顺义胡金卫陈继
Owner EVERGRANDE NEW ENERGY AUTOMOTIVE INVESTMENT HLDG GRP CO LTD
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