Thermal runaway prevention and control equipment for battery pack air duct

Abstract

The invention relates to the technical field of new energy vehicles, in particular to thermal runaway prevention and control equipment for a battery pack air duct. The invention provides the thermal runaway prevention and control equipment for the battery pack air duct, and the equipment comprises an air inlet duct which is connected with a passenger cabin and is connected with a battery pack through an air duct interface; a thermal runaway exhaust air duct which is connected with the battery pack through an air duct interface; a wind shielding and heat insulating gasket which is mounted between the air inlet duct and the thermal runaway exhaust duct; and a controllable electromagnet which is mounted at one end, close to the air duct interface, of the thermal runaway exhaust air duct; wherein the controllable electromagnet excites an attraction magnetic field to attract the wind shielding and heat insulating gasket to the thermal runaway exhaust air duct opening, the air inlet duct isopened, and the thermal runaway exhaust air duct is closed; the controllable electromagnet excites a repelling magnetic field to repel the wind shielding and heat insulating gasket to the air inlet duct opening, the air inlet duct is closed, and the thermal runaway exhaust duct is opened. The thermal runaway risk of the air duct of the HEV battery pack can be prevented, the safety of the HEV battery pack is improved, the battery pack can be controlled by a BMS signal, and the influence on the pressure drop of the air duct is small.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, and more specifically, relates to a thermal runaway prevention and control device for a battery pack air duct. Background technique [0002] With the adjustment of the country's new energy policy, HEV (Hybrid Electric Vehicle, unplugged hybrid vehicle) vehicles with 20-30% fuel-saving capabilities have also been included in the models that can obtain new energy points, making HEV vehicles a large market Focus on hybrid models. [0003] As the core component of new energy vehicles, the safety of power batteries will directly affect the vehicle performance and driving safety of new energy vehicles. The battery pack of HEV car has the following characteristics: [0004] 1) Use batteries with small capacity and high charge and discharge rate; [0005] 2) BDU (electrical connection box), BMCe (Battery Management Control, master control), CMCe (CellModule Control, slave control), BMS (BA...

AI Technical Summary

Problems solved by technology

[0014] HEV battery packs in the prior art do not include preventive measures against thermal runaway of the battery pack. Due to the compact internal structure of the battery pack and the use of air cooling schemes, chain reactions are prone to occur when thermal runaway occurs in the HEV battery pack. Specifically, there are the following problems :

[0015] 1) The air duct design and material selection in the battery pack design of HEV vehicles cannot meet the requirements of controlling and preventing thermal runaway;

[0016] 2) The inlet and outlet air ducts of the cooling air duct are all in the passenger compartment, making it a guide channel for the thermal runaway gas. If the battery pack is thermally out of control, the air inlet and outlet ducts exposed to the victim compartment will become the only channel for the thermal runaway gas Directly spread toxic thermal runaway gas and high-temperature substances into the passenger compartment along the air duct, causing threats and injuries to the health and safety of passengers

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