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Immersed liquid cooling heat dissipation module and heat dissipation method

A liquid-cooled heat dissipation and immersion technology, applied to electrochemical generators, electrical components, circuits, etc., can solve the problems of increasing the risk of arc and common mode interference, flashover along the surface, safety accidents, etc., to improve heat exchange and cooling efficiency , improve heat dissipation capacity, and prevent fire risks

Pending Publication Date: 2022-03-08
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complex pipeline structure of the liquid cooling system and the application properties that are closely attached to the battery will greatly improve the uneven distribution of the electric field in the high-voltage battery system, change the parasitic parameters of the battery to the ground, and increase the risk of arc and common mode interference; water is used as the The water vapor generated by the liquid cooling system of the cooling medium adheres to the surface of the insulating medium, and it is easy to cause flashover along the surface under an extremely uneven electric field, thereby causing insulation damage and safety accidents
Compared with air cooling, liquid cooling costs more and has a more complex structure, but it can better improve the uniformity of the battery system and control the temperature rise of the battery; although phase change material cooling can achieve better temperature control, but because of high cost and application Issues such as immature technology are still in the stage of laboratory verification

Method used

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  • Immersed liquid cooling heat dissipation module and heat dissipation method
  • Immersed liquid cooling heat dissipation module and heat dissipation method
  • Immersed liquid cooling heat dissipation module and heat dissipation method

Examples

Experimental program
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Embodiment 1

[0044] In this heat dissipation module, a 60Ah lithium iron phosphate battery is selected and grouped by 2 parallel 16 strings. For the arrangement of temperature detectors, a temperature sensor is arranged at the negative pole ear of each 2 parallel batteries. The distance between the battery in the direction of the maximum contact surface is 3mm, the distance between the battery and the outer wall of the module is 5mm, and the shortest distance from the top of the module to the battery connection piece is 10mm. The direct contact cooling liquid used is fluorinated liquid, and the dosage is 5L, the cooling used is water-ethylene glycol solution, and the inlet flow rate is 1.5L / min.

[0045] Bring the measured battery heating power data into the Fluent software, set the initial temperature of the environment at 18°C, and after 6 cycles, from Figure 5 It can be seen that the average temperature of the batteries in the battery module is about 26°C, and the battery with the high...

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Abstract

The immersed liquid cooling heat dissipation module comprises a box body with an opening at the bottom, a liquid cooling plate for placing a battery module is arranged at the bottom of the box body, the liquid cooling plate and the box body form a closed structure, the box body is filled with a cooling liquid for immersing the battery module, and a liquid cooling medium is introduced into the liquid cooling plate. The box body is filled with the cooling liquid used for immersing the battery module, high safety and efficient heat dissipation performance are achieved, the battery module is directly cooled by arranging the liquid cooling plate on which the liquid cooling medium flows, and the heat dissipation capacity of the battery module is improved. The flow velocity of the liquid cooling medium of the liquid cooling plate is adjusted by monitoring the temperature of the battery, and the temperature of the battery is controlled within a reasonable working interval.

Description

technical field [0001] The invention belongs to the field of battery energy storage system integration and application thermal management and safety, and specifically relates to an immersion liquid cooling heat dissipation module and heat dissipation method, which are suitable for integrated heat dissipation of high-voltage battery systems. Background technique [0002] As a flexible scheduling resource, the energy storage system plays a significant role in new energy consumption, power system operation, and security and stability control. Among them, electrochemical energy storage is one of the fastest growing and most widely used energy storage technologies. However, lithium-ion batteries have intrinsic safety issues. Considering the existing energy storage systems have problems such as insufficient heat dissipation and poor temperature distribution uniformity of batteries, there is a certain risk of thermal runaway accidents. Therefore, it is necessary to effectively imp...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/6567
CPCH01M10/613H01M10/6567Y02E60/10
Inventor 惠东赖铱麟渠展展刘皓杨凯汪奂伶高飞范茂松张明杰耿萌萌谭震
Owner CHINA ELECTRIC POWER RES INST
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