Battery pack safety protection system and method

Abstract

The invention relates to a battery pack safety protection system and method. The battery pack safety protection system comprises: a gas source device used for supplying flame-retardant gas to a battery pack; a gas supply gas path which is connected between the gas source device and the battery pack, wherein an air supply control valve is arranged on the air supply path, the air supply control valve enables the air supply path to have a normal state and an emergency state, the air supply flow in the emergency state is larger than the air supply flow in the normal state, the gas leakage detection device is used for detecting the gas leakage condition in the battery pack, and the thermal runaway detection device is used for detecting whether thermal runaway occurs or is about to occur in the battery pack; and a control device which is connected with the gas supply control valve, is connected with the gas leakage detection device and / or the thermal runaway detection device, and is used for controlling the switching between the normal state and the emergency state of the gas supply gas path. According to the scheme, the problem that the safety protection performance of an existing battery pack safety protection system is limited is solved.

Description

technical field

[0001] The invention relates to a battery pack safety protection system and method. Background technique

[0002] With the popularity of new energy vehicles in the market, fire accidents of new energy vehicles have occurred frequently in recent years. As the core component of new energy vehicles, battery safety is becoming more and more important. The inside of the ordinary battery pack is in the air environment, which is an air atmosphere. Due to the presence of oxygen in the air, when the power battery is under extreme conditions such as abuse or accidents, electrolyte leakage, ignition and arcing problems will occur. Safety accidents such as fire and explosion may occur.

[0003] In the prior art, there are also some battery packs that adopt the technical scheme of replacing the internal gas with an inert gas. For example, a battery box filled with a flame-retardant gas disclosed in the Chinese patent document with the publication number CN208256783U pass...

Examples

Embodiment Construction

[0073] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0074] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the...

technical field

[0001] The invention relates to a battery pack safety protection system and method. Background technique

[0002] With the popularity of new energy vehicles in the market, fire accidents of new energy vehicles have occurred frequently in recent years. As the core component of new energy vehicles, battery safety is becoming more and more important. The inside of the ordinary battery pack is in the air environment, which is an air atmosphere. Due to the presence of oxygen in the air, when the power battery is under extreme conditions such as abuse or accidents, electrolyte leakage, ignition and arcing problems will occur. Safety accidents such as fire and explosion may occur.

[0003] In the prior art, there are also some battery packs that adopt the technical scheme of replacing the internal gas with an inert gas. For example, a battery box filled with a flame-retardant gas disclosed in the Chinese patent document with the publication number CN208256783U pass...

Examples

Embodiment Construction

[0073] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0074] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the...

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