Method for generating SOC source in BMS detection and method for testing SOC estimated accuracy

A generation method and precision testing technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of low accuracy test of SOC estimation algorithm, and achieve the effect of avoiding replacement

Inactive Publication Date: 2014-04-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem of relatively low accuracy test of SOC estimation algorithm in the BMS to be tested on the battery management system test platform, and provides a SOC source generation method and SOC estimation accuracy test method for BMS detection

Method used

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  • Method for generating SOC source in BMS detection and method for testing SOC estimated accuracy
  • Method for generating SOC source in BMS detection and method for testing SOC estimated accuracy
  • Method for generating SOC source in BMS detection and method for testing SOC estimated accuracy

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specific Embodiment approach 1

[0041] Specific implementation mode one: the following combination figure 1 Describe this embodiment mode, a kind of SOC source generation and SOC estimation accuracy test method for BMS detection described in this embodiment mode, the implementation steps of this method are:

[0042] Step 1: Select a sample battery;

[0043] Step 2: Set the test environment temperature of the sample battery as N;

[0044] Step 3: Pretreatment: When the test environment temperature of the target sample battery is changed, the sample battery of the test object needs to be kept at the new test environment temperature until the surface temperature of the sample battery cell or the single sample battery in the sample battery pack is the same as the test temperature. If the difference in ambient temperature is less than the set threshold, it can be considered that the pretreatment of the sample battery cell or sample battery pack is completed;

[0045] Step 4: Carry out an available capacity expe...

specific Embodiment approach 2

[0093] Embodiment 2: This embodiment differs from Embodiment 1 in that: the value of N in Step 1 is -20°C to 60°C. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0094] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the selection of the sample battery in the step 1 is specifically: selecting a battery with a characteristic standard deviation of less than 2% among the sample battery cells as the sample battery, and the The inter-cell characteristics of the sample battery include: capacity, internal resistance and open circuit voltage. Other steps and parameters are the same as those in Embodiment 1 or 2,

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Abstract

The invention relates to a method for generating a SOC source in BMS detection and a method for testing the SOC estimated accuracy and belongs to the technical field of power battery or power battery pack management and tests. The method for testing the SOC estimated accuracy aims at solving the problem that the SOC estimated algorithm accuracy, in a BMS to be tested, tested by a battery management system test platform is relatively low. The method for generating the SOC source in BMS detection comprises the steps that firstly, a sample battery is selected; secondly, the test environment temperature of the sample battery is set to be N; thirdly, preprocessing is conducted; fourthly, an available capacity test is conducted on the preprocessed target sample battery; fifthly, a common working condition test is conducted on the target sample battery after the available capacity test is conducted; sixthly, a calibration working condition test is conducted on the target sample battery after the common working condition test is conducted. The method for testing the SOC estimated accuracy comprises the steps of setting of the test environment temperature N, preprocessing, execution of the common working condition test and execution of the calibration working condition test.

Description

technical field [0001] The invention relates to a SOC source generation and SOC estimation accuracy testing method for BMS detection, and belongs to the field of power battery or power battery group management technology and testing technology. Background technique [0002] The battery management system (Battery Management System, BMS) is an indispensable and important component of power and energy storage battery packs (especially electric vehicle battery packs). BMS has functions such as real-time monitoring of battery pack status, automatic equalization, estimation of State of Charge (SOC), intelligent charge and discharge management, etc., which play an important role in ensuring safe operation of battery packs and prolonging battery life. [0003] The battery management system test platform completes the battery management system state detection accuracy test, safety test, communication function test, SOC estimation accuracy test and environmental adaptation by simulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 朱春波冯飞逯仁贵
Owner HARBIN INST OF TECH
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