Evaluation method and device for consistency of busbar temperature rise

Abstract

The invention discloses an evaluation method and device for consistency of busbar temperature rise, and relates to the technical field of battery connecting pieces. The evaluation method and device for consistency of the busbar temperature rise is used for facilitating type selection of busbars. The evaluation method for consistency of the busbar temperature rise comprises the following steps of (1) applying first current to each busbar of a set of busbars to be detected, carrying out real-time collection and recording of temperature parameters of each busbar, (2) calculating a temperature rise value of each busbar when the first current passes through each busbar according to the recorded temperature parameters, (3) calculating an average temperature rise value of the busbars to be detected according to the temperature rise values of the busbars, (4) calculating a temperature rise standard difference of the busbars to be detected when the first current passes through the busbars according to the temperature rise values of the busbars and the average temperature rise value of the busbars to be detected, (5) judging the consistency of the temperature rise of the busbars to be detected when the first current passes through the busbars according to the temperature rise standard difference. The evaluation method for consistency of the busbar temperature rise is used for type selection of the busbars.

Description

technical field [0001] The invention relates to the technical field of battery connectors, in particular to a method and device for evaluating the consistency of busbar temperature rise. Background technique [0002] The core technology of electric vehicles is the energy storage and supply system. The battery is the main source of power for electric vehicles, and its application technology has become the key technology for the industrialization of electric vehicles. When the batteries of electric vehicles are used, the battery cells need to be connected in series and parallel through wires to provide continuous power for electric vehicles. Therefore, the performance of the battery connectors used in the application of batteries in groups is very important. [0003] At present, in battery pack technology, busbars are generally used as the connectors between batteries. Busbars of different materials, cross-sectional areas, and lengths will have inconsistent temperature rises d...

AI Technical Summary

Problems solved by technology

[0003] At present, in battery pack technology, busbars are generally used as the connectors between batteries. Busbars of different materials, cross-sectional areas, and lengths will have inconsistent temperature rises during the working process under the condition of external current and temperature changes, so that the entire battery The internal resistance of the package increases and the calorific value increases, which will have a negative impact on the battery. The existing practice is to select the specification of the busbar according to the load current of the busbar, but ignore the shape, length, material, cross-sectional area, etc. of the busbar. The impact on the temperature rise of the busbar over-current, therefore, a systematic evaluation method is required to evaluate the temperature rise of the busbar of the same material when the current passes through, so as to facilitate the selection of the busbar

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