A module top heating system and control method suitable for soft pack power batteries

Abstract

The invention discloses a module top heating system suitable for a soft package power battery and a control method. The module top heating system mainly comprises a soft package battery core module, a heater, a temperature collector and a BMS, wherein insulating treatment is adopted for the surface of the heater; the heater is attached to a busbar at the top of the soft package battery core module; a module cover plate presses a heating film, so that the heating film is clung to the busbar; a temperature collector probe is arranged on the busbar of the module; and the heating film and the temperature collector are connected to the BMS. The heat energy transfer path is the heater-busbar-tab-copper-aluminum foil-positive and negative electrode materials- membrane-electrolyte-aluminum-plastic film-battery core external parts, heat energy is transferred outwards from the inside of a battery core through the tab, the heat transfer path is more reasonable and the heating efficiency is high.

Description

technical field [0001] The invention relates to a module top heating system and a control method suitable for soft pack power batteries. Background technique [0002] The future power battery is the core link in the development of new energy vehicles. The development of advanced power battery materials plays an important role in reducing the cost and improving the practicality of new energy vehicles. Power battery materials represented by lithium-ion batteries are key technologies for the development of new energy vehicles. However, lithium-ion batteries have very high requirements on the operating temperature, and the charging temperature is required to be above zero. If the temperature of the lithium-ion battery itself is too low, it will not be able to charge if it is light, or it will cause a short circuit inside the battery, causing a fire and explosion. [0003] The power battery heating scheme of the existing pouch cell module usually adopts two heating schemes, th...

AI Technical Summary

Problems solved by technology

The key parts that affect the low-temperature charging performance of the battery are the positive and negative electrode materials and copper and aluminum foils. Therefore, the existing heating scheme has an unreasonable heat transfer path and low heating efficiency.

[0006] In addition, the existing bottom and side schemes also have the disadvantage of high requirements for space structure

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