Single battery performance parameter acquisition system for battery pack

Abstract

The invention provides a single battery performance parameter acquisition system for a battery pack. A battery parameter acquisition board is designed by using a dedicated battery voltage management chip and an isolating chip, and consists of a central processing unit, a voltage acquisition circuit, a current acquisition circuit, a temperature acquisition circuit, an atmospheric pressure acquisition circuit and communication interfaces for quickly acquiring parameters such as voltage, temperature, current, atmospheric pressure and the like of a serial battery pack; in the design, synchronization of voltage and current of the battery is fully considered; various communication interfaces (a controller area network CAN and a serial port) are designed on the acquisition board; the acquired battery parameters are transmitted to a concentrator by using various communication protocols; the acquired data is then transmitted to a computer in an optical fiber transmission mode or a wireless transmission mode by the concentrator according to actual conditions, so that the parameters such as electric quantity, energy, internal resistance and the like of the battery are calculated; and each parameter of the battery is analyzed and the batteries with high consistency are grouped; thus the aims of remote wireless automatic acquisition, evaluation and grouping of the battery parameters are fulfilled.

Description

technical field [0001] The invention relates to a data acquisition system, in particular to a battery performance parameter data acquisition system. Background technique [0002] All kinds of battery cells have relatively low voltage, such as 2V for lead-acid batteries, 1.2V for nickel-metal hydride batteries, and 3.6V for lithium batteries. Whether the performance of the whole battery is consistent will directly affect the performance of the whole battery pack. Therefore, a single battery pack acquisition system is developed for battery manufacturers to collect battery parameters such as voltage, temperature, air pressure, and current. Through computer software analysis, the characteristics and consistency It is particularly important to distribute batteries with better performance and assemble them into battery packs that are actually required. [0003] There are many parameters that affect battery characteristics, such as voltage, current, temperature, air pressure, etc....

AI Technical Summary

Problems solved by technology

At present, the voltage collection of the battery collection system generally adopts the isolation inspection method, which has problems such as slow collection speed, low accuracy, limited number of single batteries collected, and asynchronous collection of current and voltage, which affect the battery SOC value, energy, internal resistance, etc. The calculation accuracy of the parameters will affect the correct analysis of the battery performance

In addition, the application of batteries to new energy vehicles is still in its infancy. It is particularly important to collect and analyze the parameters of battery cells in the operation of new energy vehicles. However, due to the inconvenient wiring, the parameters of the collected batteries are transmitted to the background computer by using wired transmission. It is basically not advisable to analyze

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