Self-regulating heating system and control method for rail transit battery pack

Abstract

The invention discloses a rail transit battery group self-regulating heating system and a control method, comprising: a heating plate, a temperature sensor, an automatic winder, a high-voltage wiring harness, a signal wiring harness, a controller, a high-voltage box, and a storage battery. The heating sheet is arranged on the side of the battery module, and the controller controls the opening and closing of the switch in the high-voltage box to supply power to the automatic winder and the heating sheet. The rotation of the automatic winding device drives the position of the heating wire inside the heating sheet to move, so that the heating sheet Module heating; method: the temperature sensor monitors the temperature of the battery module, according to the real-time temperature distribution of the battery module, the automatic winder adjusts the position distribution of the heating wire in the heating sheet, adjusts the heating power of different positions of the heating sheet, and realizes the battery module according to the battery module. The temperature distribution is self-regulating for heating. Through the real-time adjustment of the position of the heating wire inside the heating sheet, the heating effect can be maintained with the temperature distribution of the battery module to maintain the best state, improve the heating balance, and then improve the performance and service life of the battery.

Description

technical field [0001] The invention relates to the technical field of rail transit battery pack heating, in particular to a rail transit battery pack self-regulating heating system and a control method. Background technique [0002] At present, domestic and foreign cities and intercity rail transit all use electric power as energy, but they are all equipped with emergency power supply, so that the train has the ability to move autonomously when the power grid fails. At present, emergency power supplies are formed in groups of lithium-ion power batteries. In cold regions such as the north, the temperature of the batteries is often below zero in winter, which cannot reach the optimal working temperature range of lithium-ion batteries. Forcible use will cause battery life to decay. It will enter the scrapped state early, and at the same time, it is very easy to make the battery enter a dangerous working state, causing accidents and potential safety hazards. In order to ensure...

AI Technical Summary

Problems solved by technology

However, the current heating plate has a fixed structure and constant heating power, and it is impossible to adjust the heating power of each part according to the specific temperature change of the battery module, resulting in uneven heating of the battery in the battery module, resulting in The temperature difference between each battery is large, which limits the performance and service life of the battery

[0004] Patent No. ZL201420275927.1, date of authorization November 5, 2014, the name of the invention is a battery heating system, the application discloses a battery heating system, the disadvantages are: 1. The battery disclosed in the invention patent The heating system can’t adjust the heating power of the battery according to the real-time changes in the temperature of the battery module; 2. It is arranged on both sides of the module, and the battery in the middle cannot be directly heated, and the heating takes a long time

[0005] Patent application number CN201610593189.9, published on October 26, 2016, the name of the invention is a battery heating device with thermal management, the application discloses a battery heating device with thermal management, its disadvantages are The heating wire is used to heat the battery. The layout of the heating wire is not firm and reliable, which will make the structure of the battery module messy and increase the probability of danger. At the same time, the heating wire cannot adjust the heating power for a certain area, and the heating balance is poor.

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