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Adjustable battery pack heat dissipation system and method based on negative thermal expansion material

A negative thermal expansion and heat dissipation system technology, which is applied in secondary batteries, battery temperature control, circuits, etc., can solve problems such as consumption and cooling efficiency limitations, and achieve the effects of increasing coolant flow rate, simple and convenient maintenance, and enhancing cooling speed

Pending Publication Date: 2022-04-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Active cooling systems generally consume electric energy, and the running state of the car is often in a state of change. The heat dissipation pipes of the traditional cooling system are generally in a fixed state, and only the water pump participates in heat dissipation control, so the cooling efficiency is limited

Method used

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  • Adjustable battery pack heat dissipation system and method based on negative thermal expansion material
  • Adjustable battery pack heat dissipation system and method based on negative thermal expansion material
  • Adjustable battery pack heat dissipation system and method based on negative thermal expansion material

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] When the battery is working, it will generate a lot of heat. Without proper heat dissipation measures, the heat will damage the battery or even cause the battery to catch fire and explode. When the electric vehicle is working, the heat dissipation system will play a good role in heat dissipation. The negative thermal expansion material has the special property of thermal contraction, so the partition filled with the negative thermal expansion material ca...

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Abstract

The invention discloses an adjustable battery pack heat dissipation system and method based on a negative thermal expansion material. The system is composed of a variable-section cooling water pipe, a flow velocity sensor, a water temperature sensor and a controller. A plurality of cooling water pipes are bent and attached to the surface of a battery pack, each cooling water pipe is composed of an aluminum alloy shell and a middle partition plate of a negative thermal expansion structure, a plurality of flow velocity sensors and water temperature sensors are evenly distributed on the cooling pipes, the sensors collect cooling water flow data and are connected with a controller, and the controller controls a water pump. The flow velocity is changed by matching with a variable-section pipeline. By means of the deformation characteristic that the negative thermal expansion material shrinks after being heated, the cross section area of the pipeline can be increased along with increase of the cooling water temperature, meanwhile, the controller controls the water pump to increase the rotating speed, and finally the cooling efficiency of the cooling system is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle batteries, and in particular relates to an adjustable battery pack heat dissipation system and method based on negative thermal expansion materials. Background technique [0002] After the electric vehicle is started, due to the continuous discharge of the battery, the motor and other components will release a large amount of heat, which will cause the temperature of the components to rise. If the temperature is too high, the components and batteries will be damaged or even burned. Therefore, it is necessary to carry out a cooling design for electric vehicle batteries. Active cooling systems generally consume electric energy, and the running state of the car is often in a state of change. The heat dissipation pipes of the traditional cooling system are generally in a fixed state, and only the water pump participates in heat dissipation control, so the cooling efficiency is limited. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/6556H01M10/6568H01M10/63H01M10/653
CPCH01M10/613H01M10/625H01M10/6556H01M10/6568H01M10/63H01M10/653Y02E60/10
Inventor 方子豪周冠赵嘉乐
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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