battery system

Abstract

A battery pack system, including several battery cells, a sealing liquid and a battery box containing the sealing liquid, the battery cells are soaked in the sealing liquid, the battery box is composed of a box body and a cover plate, and a sealing liquid outlet is arranged on the box body And a sealing liquid inlet, the outlet is connected with the inlet through the circulation pump and the buffer tank to form a circulation channel, and the detection part is installed in the buffer tank, when the leakage occurs in the battery unit, when the sealing liquid mixed with the electrolyte flows through the buffer tank The detected part is detected, and the detection part gives a feedback signal. After adopting the solution provided by the present invention, the leaked electrolyte can be sealed in the flame-retardant sealing liquid, preventing the electrolyte from contacting with the air, and causing danger of combustion; detecting whether the battery cells in the battery box are broken in the first time , and a warning is issued to improve the safety of the battery box.

Description

technical field [0001] The invention relates to a battery pack system, in particular to a battery pack system capable of detecting battery leakage. Background technique [0002] At present, battery-powered electric vehicles and electric buses are gradually replacing traditional cars and buses. The battery cell is the main energy storage device on the electric vehicle, and the battery box, as a device for loading the battery cell, is a key component of the electric vehicle, which directly affects the performance of the battery cell and thus affects the performance of the electric vehicle. Due to its excellent power output characteristics and long life, lithium-ion power batteries are currently widely used in electric vehicles. [0003] As the main energy storage device of electric vehicles, the battery cell is generally formed by connecting multiple batteries in series and parallel. During the charging process of the lithium-ion battery, the aprotic solvent in the electrolyt...

AI Technical Summary

Problems solved by technology

[0003] As the main energy storage device of electric vehicles, the battery cell is generally formed by connecting multiple batteries in series and parallel. During the charging process of the lithium-ion battery, the aprotic solvent in the electrolyte will react on the interface between the electrode and the electrolyte. These reactions On the one hand, a passivation film covering the surface of the electrode is formed, and at the same time, gases such as hydrogen, hydrocarbons, carbon monoxide, and carbon dioxide are produced. These gases will cause the internal pressure of the battery to increase, and the problem of gas swelling will seriously affect the performance of the battery. Cycle performance and battery safety performance), when the gas in the battery accumulates to a certain extent, the packaging material of the battery cell will rupture, and the leaked flammable gas will fill the entire battery box. If this process lasts for a long time, the battery box will The gas in the battery box will break through the seal of the battery box and eventually destroy the battery box, so that the air enters the battery box, and it is very easy to cause danger or even explode when encountering flammable gas in the battery box

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