Battery open-circuit voltage estimation method and system

An open-circuit voltage and battery technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of being unable to accurately predict the real-time open-circuit voltage of the battery cell, and achieve the effect of accurate battery open-circuit voltage

Active Publication Date: 2021-11-19
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose a method for estimating the battery open circuit voltage, to at least solve the problem in the current related art that the real-time cell open circuit voltage cannot be accurately estimated when the battery is activated

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  • Battery open-circuit voltage estimation method and system
  • Battery open-circuit voltage estimation method and system
  • Battery open-circuit voltage estimation method and system

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Embodiment Construction

[0036] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In addition, the battery operating parameters mentioned in the embodiments of the present invention may refer to any or various battery parameters other than the battery state. For example, battery output current, output voltage, temperature, charging time or discharging time, etc.

[0038] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0039] Such as figure 1 As shown, the battery open circuit voltage estimation method according to an embodiment of the present invention includes:

[0040] S11. Collect battery working parameters and battery status, wherein the battery status is used to indicate an active status or a rest status.

[0041] Regarding the execution subject of the embodiment of the present invention, it can b...

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Abstract

The present invention relates to the field of battery technology, and provides a battery open-circuit voltage estimation method and system, wherein the method includes: collecting battery operating parameters and battery status; when the acquired battery status indicates an active status, acquiring status allocation weights; based on pre-configuration Calculate the static battery open circuit voltage corresponding to the first battery operating parameter based on the static battery open circuit voltage estimation model; calculate the dynamic battery open circuit voltage corresponding to the second battery operating parameter based on the preconfigured dynamic battery open circuit voltage estimation model; The state allocation weight adjusts the static battery open circuit voltage and the dynamic battery open circuit voltage, and determines the target battery open circuit voltage according to the weight adjusted static battery open circuit voltage and dynamic battery open circuit voltage. Therefore, the real-time battery open-circuit voltage determined under the dynamic battery state can be more accurate.

Description

technical field [0001] The present invention relates to the field of battery technology, in particular to a battery open-circuit voltage estimation method and system. Background technique [0002] New energy vehicles have the advantages of low pollution, simple structure, and low noise, and are an important direction for the future development of the automotive industry. As a type of new energy vehicles, electric vehicles have the advantages of no pollution, zero emissions, low noise, economical and practical, and are the mainstream direction of the future development of the automotive industry. SOC (state of charge, battery state of charge) is an important parameter of an electric vehicle, which indicates the percentage of the remaining OCV (Open Circuit Voltage, open circuit voltage) of the electric vehicle to the rated OCV, which is affected by the battery pack temperature, voltage and current etc., so it is difficult to calculate the SOC accurately and in real time. Th...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01R31/367
CPCG01R31/367
Inventor任永昌高攀龙
OwnerSVOLT ENERGY TECHNOLOGY CO LTD