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Battery pack thermal safety structure, battery pack thermal management system and vehicle

A technology of safety structure and safety pipeline, applied in the direction of batteries, structural parts, secondary batteries, etc., can solve the problems of inability to achieve effective cooling of battery cells, achieve the effects of ensuring pressure, ensuring safety, and inhibiting thermal runaway

Active Publication Date: 2020-12-29
BYD CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a battery pack thermal safety structure, a battery pack thermal management system and a vehicle to solve the technical problem that the existing solutions cannot effectively cool the battery cells that are thermally out of control

Method used

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  • Battery pack thermal safety structure, battery pack thermal management system and vehicle

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Embodiment Construction

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by 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, not to limit the present invention.

[0045] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element and similar expressions, it may be directly on another element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] In addition, the terms "first", "second" and similar terms are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or im...

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Abstract

The invention provides a thermal safety structure of a battery pack. The thermal safety structure comprises a battery box body, a thermal safety pipeline and a pressure relief structure, wherein the thermal safety pipeline is arranged on the battery box body; the thermal safety pipeline comprises a cooling liquid inlet and at least two jet orifices, the cooling liquid inlet is communicated with anexternal cooling system, the jet orifices are located in the battery box body and located on the lower portion of the battery box body, and a first valve located between the cooling liquid inlet andthe jet orifices is arranged on the thermal safety pipeline; the pressure relief structure is arranged on the battery box body. The invention further provides a battery pack thermal management systemwhich comprises a battery manager and the battery pack thermal safety structure. A vehicle is also provided. The low-temperature and low-pressure liquid cooling liquid sprayed out of the cooling liquid is in contact with the high-temperature single battery and then is quickly evaporated into a gas state, the gas cooling liquid can fully exchange heat with the single battery in the gradual rising process, and the temperature of the single battery can be quickly reduced along with continuous spraying and vaporization heat absorption of the cooling liquid; and thermal runaway of the single battery is effectively inhibited.

Description

technical field [0001] The invention belongs to the field of power batteries, and more specifically relates to a battery pack thermal safety structure, a battery pack thermal management system and a vehicle. Background technique [0002] Temperature is an important factor affecting the performance of power batteries. Therefore, it is necessary to strictly manage the temperature of power batteries. The use of power batteries generates a lot of heat. Once the heat on the battery cells is not dissipated in time, the thermal runaway of the battery cells will spread to the surroundings. The battery monomer will cause a chain reaction of bad battery thermal accidents, which will lead to more serious safety accidents. Although the existing battery pack thermal management system can regulate the temperature of the battery cells, it cannot effectively cool the thermally runaway battery cells. Contents of the invention [0003] The purpose of the present invention is to provide a b...

Claims

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Application Information

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IPC IPC(8): H01M2/10H01M10/613H01M10/625H01M10/6569H01M2/12
CPCH01M10/613H01M10/625H01M10/6569H01M2220/20Y02E60/10
Inventor 凌和平宋淦朱平马锐胡杰
Owner BYD CO LTD
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