A Thermal Data Acquisition Smart Current Regulation Battery Box with Replaceable Battery Units

Abstract

The invention relates to an intelligent current regulation battery box with a replaceable battery unit for heat data acquisition, and belongs to the technical field of battery management. Holes which are opposite up and down are formed in a top plate and a bottom plate of a battery pack; single batteries stacked into groups are loaded into sleeves to be pressed in openings in the top plate and the bottom plate by two ends of upper end covers and lower end covers with ventilating windows; a thermal expansion and contraction open and close window is arranged in the first section of single battery in each sleeve; positive electrodes and negative electrodes for extracting single battery groups are arranged in openings of the upper end covers and the lower end covers respectively; positive electrode output is connected with a thermal fuse; a current loop of each positive electrode and negative electrode is connected with one bleeder resistor, one thermistor and one led lamp bead in series; each thermistor is connected with a grid of one corresponding field-effect tube; the positive electrode of each single battery group is connected with a drain of the corresponding field-effect tube; and source output ends of all field-effect tubes are connected in parallel. The intelligent current regulation battery box is simple in structure; the temperature conditions of the batteries formed by connecting the single batteries in series can be quickly judged; the single batteries can be freely replaced; independent current regulation can be carried out according to the temperature; and intelligent and independent air cooling can be achieved.

Description

Technical field [0001] The invention relates to a thermal data acquisition intelligent current regulation battery box for a replaceable battery unit, which belongs to the technical field of battery management. Background technique [0002] Battery management system (BATTERY MANAGEMENT SYSTEM), 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 status estimation; online diagnosis and early warning; charging , discharge and precharge control; balance management and thermal management, etc. The performance of batteries is very complex, and the characteristics of different types of batteries vary greatly. The battery management system (BMS) is mainly to improve the utilization rate of the battery, prevent the battery from overcharging and overdischarging, prolong the service life of the battery, and monitor the sta...

AI Technical Summary

Problems solved by technology

[0024] The current problem is that once the battery unit is assembled, it needs to be packaged. If a basic unit battery in the packaged battery box fails, it will endanger other healthy batteries around it, making the whole battery box healthy. The condition is deteriorating, the life is shortened, and the current technology cannot accurately determine which battery is the packaged battery. Another problem is that even if a certain battery is found to have a problem, the unit battery (cell) cannot be checked. Replacement, the current technical solution is that when a group of batteries has a problem, there will be a large current, and a fuse or a PNP type field effect transistor will be used to disconnect the power transmission end of the problematic battery group to protect other battery groups. Technical solution During the long-term use of the battery, when there are more and more bad battery packs, the load on other batteries will become heavier and heavier, which will also shorten the life of the entire battery and cause it to be scrapped ahead of time. Therefore, how to judge in time Which unit battery has a problem, and it can be replaced in time is also an urgent problem to be solved in battery management

If the working time of the battery cell is too long, the heat absorption of the insulation cover reaches the limit. Since each battery cell is stacked together, heat exchange with the surrounding environment cannot be realized, so this solution is only suitable for the battery in short-term work. environment of

[0026] In addition, thermal management can be carried out through the power management system recorded in the existing literature to achieve temperature control, but this kind of technology requires too much technical requirements for the power supply thermal management of the battery box through the program, and its calculation mode is complicated, and the management effect is not ideal , it is impossible to realize the precise management of single (cell) batteries, and there is no feasible technology at present, and this problem needs to be solved urgently

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