Method and device for determining limit fast charging current of battery cell, electronic equipment and medium
A charging current and cell technology, applied in battery circuit devices, battery/fuel cell control devices, charging/discharging current/voltage regulation, etc. Fast charging ability and other issues, to achieve the effect of saving samples and testing resources, and saving costs
Pending Publication Date: 2021-06-25
GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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However, the formulation methods of the above two fast charging strategies are both "trial and error", which will be subject to factors such as the experience of the planners and testing resources, and the potential rebound characteristics of the battery cells are not considered, so that the Make full use of the fast charging capability of the battery
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[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0061] In recent years, with the implementation of environmental protection and energy saving and emission reduction policies, new energy vehicles have achieved unprecedented development, and have gradually grown into sales rookies in the automotive market. For new energy vehicles, battery life, charging and safety are the three issues that consumers are most concerned about. It largely depends on the power source of electric vehicles - batteries. Today...
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The embodiment of the invention provides a method and a device for determining limit fast charging current of a battery cell, electronic equipment and a medium. The method comprises the following steps of dividing a charging process of the battery cell into n charging stages according to electric quantity; determining a rebound potential value and a polarization potential value of each charging stage and a difference value of allowable lowest cathode potentials of adjacent charging stages one by one according to the sequence of the numerical values of n from large to small; calculating one or more charging current values of each charging stage according to the rebound potential value and the polarization potential value of each charging stage and the difference value of the allowable lowest cathode potential of the adjacent charging stage; and according to one or more charging current values of each charging stage in the n charging stages, determining target limit fast charging currents corresponding to different charging stages meeting preset conditions. The method is advantaged in that the rebound potential characteristic of the battery cell is effectively utilized, the limit fast charging capacity of the battery cell is calculated, a large number of samples and test resources can be saved, and the method has advantages of high efficiency, accuracy and cost saving.
Description
technical field [0001] The present invention relates to the technical field of power batteries, in particular to a method for determining a limit fast charging current of a battery, a device for determining a limit fast charging current of a battery, an electronic device, and a computer-readable storage medium. Background technique [0002] With the development of new energy vehicles, the demand for mainstream lithium batteries is increasing, and the charging speed of lithium batteries has become the focus of people. In order to increase the charging speed of lithium batteries, battery cell suppliers usually improve battery raw materials, battery design, etc. to develop lithium-ion battery products with higher charging power. Under different conditions, the acceptable charging rate is different. If the charging capacity of the battery cell is exceeded, there will be a risk of lithium deposition. [0003] The fast charging method in the prior art generally adopts a reduced-o...
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IPC IPC(8): H02J7/00B60L53/00B60L58/12
CPCH02J7/007H02J7/00712H02J7/0048B60L53/00B60L58/12Y02T10/70Y02T10/7072Y02T90/14H02J7/00304H02J7/0069Y02E60/10
Inventor 宁峰许刚叶邦斌刘安龙刘明辉夏珩
Owner GUANGZHOU XIAOPENG MOTORS TECH CO LTD