Lithium ion battery state evaluation method and system

A lithium-ion battery and state evaluation technology, which is applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of low detection intelligence level and lack of monitoring platform monitoring, etc., to improve customer experience and realize all-round detection , the effect of improving stability

Active Publication Date: 2022-07-22
江苏金锋源新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, prior art 1 and prior art 2 only realize the determination of SOC of lithium-ion battery state of charge, lack of a unified monitoring platform for its Surveillance, and analysis, resulting in a lower level of intelligence in its detection

Method used

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  • Lithium ion battery state evaluation method and system
  • Lithium ion battery state evaluation method and system
  • Lithium ion battery state evaluation method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0061] like figure 1 As shown, the state evaluation method of the lithium ion battery provided by the embodiment of the present invention includes the following steps:

[0062] S101: Obtain the state-related parameters of the lithium-ion battery and the related parameters in the constant current-constant voltage full charging process;

[0063] S102: The controller receives the state-related parameters of the lithium-ion battery and the related parameters in the constant current-constant voltage full charging process, performs noise reduction preprocessing, and compares the parameters with the parameters pre-stored in the database to obtain a parameter comparison result;

[0064] S103: the controller transmits the parameter comparison result to the lithium-ion battery monitoring platform through a wireless network;

[0065] S104: The lithium-ion battery monitoring platform analyzes the parameter comparison result, obtains a state evaluation result of the lithium-ion battery, a...

Embodiment 2

[0068] On the basis of Example 1, the state-related parameters of the lithium-ion battery include the parameters of the lithium-ion battery in two states of operation and rest, and the parameters of the operation state of the lithium-ion battery include: the operating voltage signal, the operating current signal, and the operating battery ohmic blocking signal. The parameters of the static state of the lithium-ion battery include: battery capacity signal, open circuit voltage signal and battery ohmic internal resistance signal. The relevant parameters in the process of constant current-constant voltage full charging of lithium-ion batteries include voltage signal, current signal and temperature signal.

[0069] The invention monitors the relevant parameters of the lithium ion battery, including the parameters in the running, static and charging process, realizes the all-round detection of the lithium ion battery, and is convenient for the lithium ion battery monitoring platfor...

Embodiment 3

[0071] like figure 2 As shown, on the basis of Embodiment 2, the signal processing process of the temperature during the constant current-constant voltage full charging process of the lithium ion battery includes:

[0072] S201: A temperature sensor is provided on each surface of the lithium-ion battery, the temperature sensor collects the temperature of each surface in real time, and the detected temperature signal is converted into an electrical signal; the electrical signal of the temperature is wirelessly sent to a temperature signal receiver on the controller;

[0073] S202: The temperature signal receiver sends an electrical signal of temperature to the controller;

[0074] S203: The controller preprocesses the electrical signal of the temperature, and the controller processes the electrical signal of the temperature of the temperature sensor into a three-dimensional mesh temperature distribution map;

[0075] S204: Display the temperature distribution information of ...

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Abstract

The invention belongs to the technical field of lithium ion batteries, and discloses a lithium ion battery state evaluation method and system, and the method comprises the steps: obtaining state related parameters of a lithium ion battery and related parameters in a constant current-constant voltage full charge process; the controller receives the state related parameters of the lithium ion battery and the related parameters in the constant current-constant voltage full charge process for noise reduction preprocessing, and compares the parameters with parameters pre-stored in a database to obtain a parameter comparison result; the controller transmits the parameter comparison result to a lithium ion battery monitoring platform through a wireless network; and the lithium ion battery monitoring platform analyzes the parameter comparison result to obtain a state evaluation result of the lithium ion battery, and feeds back the state evaluation result to the controller. According to the invention, all-around detection of the lithium ion battery is realized, and the lithium ion battery monitoring platform can accurately obtain the state of charge SOC and the state of health SOH of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a state evaluation method and system for lithium ion batteries. Background technique [0002] At present, lithium-ion batteries are widely used, and the main uses are: household energy storage, small household appliances, power supply for tool products, power supply for digital products, power supply for 3C products, etc. [0003] Prior art 1, CN107402353A-a method and system for filtering and estimating the state of charge of a lithium-ion battery-disclosure, the invention discloses a method for filtering and estimating the state of charge of a lithium-ion battery, comprising: according to The parameter data on the surface of the lithium-ion battery is collected by a preset time threshold, and an equivalent circuit model of the lithium-ion battery is established; the mathematical model of the lithium-ion battery is obtained according to the equivalent c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3842G01R31/388G01R31/389G01R31/392G01R31/367
CPCG01R31/3842G01R31/388G01R31/389G01R31/392G01R31/367Y02E60/10
Inventor 高浩善闻昱姚绍和冯文振刘波鲍雷
Owner 江苏金锋源新能源有限公司
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