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Method for estimating SOH of power supply

A power supply and voltage technology, which is applied in the field of power SOH estimation, can solve the problems such as the complicated process of the power SOH calculation method, and achieve the effects of eliminating calculations, simplifying technical solutions, and improving accuracy and reliability

Active Publication Date: 2017-04-26
ZHENGZHOU YUTONG BUS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] The purpose of the present invention is to provide a method for estimating power SOH to solve the problem that the process of the existing power SOH calculation method is relatively cumbersome

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  • Method for estimating SOH of power supply

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] The lithium-ion battery adopts the commercialized positive electrode material nickel-cobalt-manganese series, and the negative electrode material is graphite series. According to the process flow and related quality control plan, the battery production, formation and subsequent aging selection process of lithium-ion battery (nominal capacity 30Ah) is completed. , for subsequent testing and analysis.

[0044] The use state of lithium-ion batteries is divided into two state modes, one is the use state, which is the dynamic state of the battery, and the voltage of the battery at this time is the dynamic voltage CCV (Close Circuit Voltage); the other is the shelving state, which is The static state of the battery. At this time, the voltage of the battery is the static voltage OCV (OpenCircuit Voltage).

[0045] When estimating the SOH value of the battery...

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Abstract

The invention relates to a method for estimating the SOH of a power supply. The method comprises the following steps: detecting voltage, temperature and current information of the power supply at the current moment, comparing the voltage, temperature and current information with a previously established database to obtain an SOC value SOCn of the power supply in the state at the moment and an SOH value SOCn-1 of the power supply in the previous state, and then estimating the SOH by means of SOH = 1- | SOCn-SOCn-1 |, wherein a relationship of the SOC with the working environment temperature, the working current and the voltage is stored in the database. As long as the working environment temperature and the working current of the current moment are collected, the voltage value in the current state is detected, then the detected value is compared with the database in which the voltage of the power supply is in one to one correspondence with the SOC in different working environment temperatures and different working current so as to obtain the SOC value of the power supply in the state of the power supply and the SOC value of the power supply in the previous state, and then the SOH value is calculated.

Description

technical field [0001] The invention relates to a method for estimating power SOH. Background technique [0002] The power management system is combined with the electric vehicle and the power battery. At present, the main function of the power management system is to collect the voltage, temperature and current of the battery, and also perform leakage current, thermal management, battery balance management, alarm management, and estimate the battery remaining Capacity, the maximum discharge power that can be provided and the maximum feedback power that can be accepted, report the SOC state, SOH state and SOF state of the battery in real time, and obtain the maximum mileage according to the voltage, temperature and output power of the battery. Through the CAN bus and Vehicle master controller, motor controller, energy control system, vehicle display system for real-time communication management. [0003] At the same time, new energy vehicles put forward higher requirements ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 曹瑞中
Owner ZHENGZHOU YUTONG BUS CO LTD
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