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Method for calibrating capacity data of battery pack and testing charging/discharging capability

A charge-discharge capability and calibration method technology, which is applied in the field of calibration method and charge-discharge capability test, can solve problems such as unusable, high current, low battery voltage, etc., and achieve the effect of avoiding temperature rise

Inactive Publication Date: 2019-02-19
SOUNDON NEW ENERGY TECH CO LTD
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Problems solved by technology

The data obtained in this way will be transferred to the vehicle strategy software, which will cause the vehicle to display power during use, but the actual battery voltage is too low to be usable, or the available current at low temperature is too large, and when the user steps on the accelerator , when the current exceeds the loadable current value of the battery and damages the battery

Method used

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  • Method for calibrating capacity data of battery pack and testing charging/discharging capability
  • Method for calibrating capacity data of battery pack and testing charging/discharging capability
  • Method for calibrating capacity data of battery pack and testing charging/discharging capability

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Embodiment Construction

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of ...

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Abstract

The invention relates to a method for calibrating capacity data of a battery pack and testing charging / discharging capabilities, and utilizes a SOC-OCV curve of a battery pack at a reference temperature and a target test temperature and combines a specific treatment method, thereby avoiding direct charging / discharging to measure capacities at the target test temperature and avoiding temperature rise. The invention is suitable for obtaining relatively accurate capacity data of the battery pack and charging / discharging capabilities in a low temperature environment.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method for calibrating battery pack capacity data and a method for testing charging and discharging capabilities. Background technique [0002] As the most critical component of a pure electric new energy vehicle, the design of the power battery is particularly important. The use of new energy vehicles in low temperature environments has always been a difficult problem in the design of lithium-ion power batteries. Due to the low temperature, the internal chemical reaction rate of the battery decreases, and it is difficult to deintercalate lithium ions in the negative electrode of the battery, resulting in a decrease in the capacity of the lithium-ion battery at low temperatures, and a decrease in the discharge capacity. The discharge current is smaller than that of the same power at normal temperature. In this case, if the vehicle still controls the discharge power acc...

Claims

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Application Information

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IPC IPC(8): G01R31/385G01R31/388
Inventor 何剑周阳罗俊张振万光明严丽
Owner SOUNDON NEW ENERGY TECH CO LTD
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