Battery pack with liquid storing, draining and liquid level monitoring functions

Abstract

The invention discloses a battery pack with liquid storing, draining and liquid level monitoring functions. The battery pack comprises a battery pack shell. A liquid storing structure communicating inthe battery pack shell is arranged at the bottom of the battery pack shell, a liquid draining structure capable of draining a liquid in the liquid storing structure is arranged on the surface of theliquid storing structure, a liquid level monitoring structure for monitoring the liquid level in the liquid storing structure is arranged in the battery pack shell, and a flow guiding structure capable of guiding condensate water in the battery pack shell to the liquid storing structure is arranged on the inner surface of the battery pack shell. By means of structural designs such as the flow guiding structure, a liquid level sensor and an electronic circuit in the battery pack, a condensate liquid level signal is fed back to BMS and VCU control systems and an instrument panel of a driving cabin timely, and the concentrate is centralized in a liquid storing tank seat, so that a driver can master abnormal conditions of the battery pack timely and maintain and drain the battery pack timely,and therefore, the safety of a vehicle in a driving process is improved effectively.

Description

technical field [0001] The invention relates to the technical field of battery structure of new energy vehicles, in particular to a battery pack with functions of liquid storage, liquid discharge and liquid level monitoring. Background technique [0002] In order to improve the safety of the power battery, the battery pack has sealing requirements. On the one hand, during the charging and discharging process of the power battery, the battery cells will continue to generate heat and dissipate heat outward, forming a temperature difference between the inside and outside of the battery pack. The water vapor outside the battery pack will enter the battery pack through the pressure balance valve of the battery pack, and then form condensed water . If the drainage in the battery pack is difficult, and the condensed water accumulates to a certain amount and touches the electrical parts, it may cause safety failures such as short circuit and corrosion, which will seriously affect t...

AI Technical Summary

Problems solved by technology

If the drainage in the battery pack is difficult, and the condensed water accumulates to a certain amount and touches the electrical parts, it may cause safety failures such as short circuit and corrosion, which will seriously affect the safety of the battery pack

On the other hand, in order to improve the charging and discharging performance of the battery, the battery pack generally has a liquid cooling device inside. When the liquid cooling device leaks, the cooling liquid may also cause safety accidents such as short circuit and fire in the battery pack.

The battery pack design currently on the market lacks monitoring, alarm and drainage measures for battery pack condensate and coolant, and there is no systematic, comprehensive, and efficient monitoring means

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