Thermal balance data collection battery box having replaceable elementary cells

Abstract

The present invention relates to a thermal balance data collection battery box having replaceable elementary cells, and belongs to the technical field of battery management. According to the present invention, four air pressure columns formed by mutual adhesion are arranged in the bushing of a battery unit, optical fibers are inserted in the center position of the air pressure columns in a penetrating manner, the gap position on the bottom end of the bushing is provided with a Dembet effect semiconductor wafer, the light spot of the light of led lamp bead is irradiated to the axial position of the semiconductor wafer through light guide fibers, the temperature difference between the battery packs is converted into the position offset of the light spot on the Dembet effect semiconductor wafer by using the air thermal expansion and cold contraction principle, the monomer battery pack and the electrical components thereof are fixed by using the upper end cover having threads and the lower end cover having threads, the monomer battery in the battery pack can be arbitrarily replaced, and the working temperature can be automatically adjusted through the thermal expansion contraction opening and closing window of the battery pack bushing; and with the thermal balance data collection battery box, the temperature in the battery unit and the fine temperature difference between the battery unit can be accurately determined and can be transmitted to the power supply management hardware system so as to provide reliable data for the thermal management and the optimization of the battery.

Description

Technical field [0001] The invention relates to a heat balance data acquisition battery box with replaceable unit batteries, which belongs to the technical field of battery management. Background technique [0002] Electric vehicle battery management system (BMS) is an important link connecting vehicle power batteries and electric vehicles. Its main functions include: real-time monitoring of battery physical parameters; battery state estimation; online diagnosis and early warning; charging, discharging and pre-charging control; balance management and thermal management etc. [0003] During the charging and discharging process of the battery, the terminal voltage and temperature of each battery in the electric vehicle storage (should be a power battery pack), the charging and discharging current and the total voltage of the battery pack are collected in real time to prevent the battery from being overcharged or overdischarged. . At the same time, it can give the battery sta...

AI Technical Summary

Problems solved by technology

[0018] Development status and existing problems: Electric vehicles will use lithium batteries as the main power source in the future. The main reason is that lithium batteries have the advantage of high energy density, so the performance is relatively stable

Therefore, the thermal management of the battery is extremely important. At present, in the thermal management of the battery, the thermal management is generally carried out through the power management system to achieve temperature control. However, the thermal management of the battery pack through the program requires too high technical requirements for the enterprise, and its calculation model is complicated. , the management effect is not ideal. The reason is that there is a small difference in the temperature of each battery pack, and this small difference cannot be obtained through theoretical calculations, so it is impossible to achieve accurate thermal management of the battery pack. There is no feasible technology, the problem needs to be solved

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