BMS detection precision calibration device and method for electric automobile battery module

A technology for battery modules and electric vehicles, which is applied in measurement devices, measurement of electricity, and measurement of electric variables, etc., can solve the problems that the detection accuracy of BMS cannot be known, the detection accuracy of BMS modules cannot be truly expressed, and the control accuracy of the control system is affected.

Active Publication Date: 2016-12-07
CH AUTO TECH CORP CO LTD
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Problems solved by technology

This method has certain disadvantages. For example, the calibration of its accuracy is generally carried out after high temperature and low temperature resistance and returning to room temperature, which cannot truly describe the BMS module of the...

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  • BMS detection precision calibration device and method for electric automobile battery module
  • BMS detection precision calibration device and method for electric automobile battery module
  • BMS detection precision calibration device and method for electric automobile battery module

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Embodiment Construction

[0119] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0120] In this article, "schematic" means "serving as an example, example or illustration", and any illustration or implementation described as "schematic" should not be interpreted as a more preferred or more advantageous Technical solutions.

[0121] In order to make the drawings concise, the figures in each figure only schematically show the relevant parts of the present invention, and do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked.

[0122] In this article, "first"...

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Abstract

The invention discloses a BMS detection precision calibration device and a method for an electric automobile battery module. According to the technical scheme of the invention, a battery module, a BMS slave board and a BMS main board are arranged in a constant-temperature box. Meanwhile, the current value, the voltage value, the SOC value and the temperature value of the battery module at various ambient temperatures are collected by charging and discharging equipment and temperature acquisition equipment, with the precision thereof higher than the BMS device, and the BMS slave board at the same time. After that, the current value, the voltage value, the SOC value and the temperature value of the battery module, collected by the charging and discharging equipment and the temperature acquisition equipment, are adopted for calibrating the precision of the current value, the voltage value, the SOC value and the temperature value of the battery module collected by the BMS slave board. According to the technical scheme of the invention, the device and the method are applicable to the wide temperature range from 40 DEG C to 85 DEG C, so that the obtained BMS detection precision is higher than that of the industry standard. Moreover, the BMS detection precision of the electric automobile in various working environments is obtained, so that a more reliable and accurate foundation is provided for the control of the electric automobile. The overall control effect of the electric automobile is improved.

Description

technical field [0001] The invention relates to the field of electric vehicle testing, in particular to an electric vehicle battery module BMS detection accuracy calibration device, and an electric vehicle battery module BMS detection accuracy calibration method using the device. Background technique [0002] BMS (BATTERY MANAGEMENT SYSTEM, battery management system) is the link between the battery and the user. BMS can improve the utilization rate of the battery, prevent the battery from overcharging and overdischarging, prolong the service life of the battery, and monitor the state of the battery. [0003] The main functions of the BMS include: accurately estimating the SOC (State of Charge, state of charge) of the power battery pack, that is, the remaining power of the battery, ensuring that the SOC is maintained within a reasonable range, and preventing damage to the battery due to overcharging or overdischarging , and display the remaining energy of the electric vehicle...

Claims

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Application Information

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IPC IPC(8): G01R35/00G01R31/36
CPCG01R31/3842G01R35/005
Inventor 陆群陈殿领
Owner CH AUTO TECH CORP CO LTD
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