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A temperature control method for liquid metal batteries in energy storage applications

A liquid metal battery, energy storage technology, applied in battery temperature control, secondary battery, secondary battery repair/maintenance, etc. The problem of capacity fading and additional power loss, the effect of improving energy efficiency and reducing self-discharge rate

Active Publication Date: 2019-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these three operating modes, due to the high operating temperature of the battery, the positive and negative electrode materials and the electrolyte are in a molten state, so that the electrode material has a certain solubility in the electrolyte molten salt, so the battery has a self-discharge phenomenon, and the battery capacity will decrease. Decay gradually
At the same time, during the battery energy storage application process, due to the maintenance of a high operating temperature, if the battery continues to maintain the temperature in the suspend mode, it will cause a large power consumption, resulting in a decrease in the energy efficiency of the battery pack

Method used

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  • A temperature control method for liquid metal batteries in energy storage applications
  • A temperature control method for liquid metal batteries in energy storage applications
  • A temperature control method for liquid metal batteries in energy storage applications

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0036] When the battery is in the suspend mode, the temperature of the battery is cooled to 400°C by means of natural temperature control. The specific operation steps are as follows:

[0037] ① Send instructions to the temperature controller through the battery management system (BMS) to turn on the no-power operation state, so that the batteries in the battery pack unit can reduce the temperature of the batteries through natural convection and heat dissipation of the external air.

[0038] ② When the average temperature in the battery pack drops to 400°C, a temperature signal is sent to the battery management system through the temperature detector.

[0039] ③The battery management system sends an instruction to the temperature controller to turn on the heating mode. In this implementation case, the heating and heat preservation power is selected as 1000W, so that the average temperature of the battery pack is maintained at 400°C.

[0040] figure 2 It is a schematic diagra...

specific Embodiment 2

[0042] When the battery is in the suspend mode, the temperature of the battery is lowered to 400°C by slowly cooling the temperature control method. The specific operation steps are as follows:

[0043] ①Send instructions to the temperature controller through the battery management system (BMS), turn on the low power to maintain the running state (the power is less than the heat dissipation power of the battery pack, and the specific power is determined by the cooling rate required under different working conditions, in this case In the embodiment, the compensation power is selected as 40W), so that the battery in the battery pack unit slowly reduces the temperature of the battery through natural convection heat dissipation to the outside air and low-power thermal energy compensation.

[0044] ② When the average temperature in the battery pack drops to 400°C, a temperature signal is sent to the battery management system through the temperature detector.

[0045] ③The battery m...

specific Embodiment 3

[0048] When the battery is in the suspend mode, the temperature of the battery is cooled to 400°C by means of rapid cooling temperature control. The specific operation steps are as follows:

[0049] ①Send instructions to the temperature controller through the battery management system (BMS) to start the non-power running state.

[0050] ②The battery management system (BMS) sends instructions to the refrigeration equipment to start the cooling operation state (its power is greater than the heat dissipation power of the battery pack, and its specific power is determined by the cooling rate required under different working conditions. In this embodiment, the The power of the cooling device is 400W) so that the battery in the battery pack unit can cool down the temperature of the battery through forced convection.

[0051] ③When the average temperature in the battery pack drops to 400°C, a temperature signal is sent to the battery management system through the temperature detector...

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Abstract

The invention belongs to the field of large-scale electrical energy storage of liquid metal batteries, and discloses a temperature regulation method for reducing battery capacity attenuation and lowering energy consumption by reducing the temperature of an electric pile in a suspend mode of a liquid metal battery in energy storage application. The temperature regulation method comprises the following steps: (a), detecting the temperature of the liquid metal battery by using temperature detecting equipment to obtain the current temperature thereof; (b), reducing the current temperature of the liquid metal battery and monitoring the current temperature in real time, and converting electrodes and an electrolyte in the liquid metal battery from a liquid phase to a colloidal state or solid phase so as to reduce the solubility of the electrodes in the electrolyte and lower the energy consumption of the liquid metal battery; (c), when the current operating temperature is reduced to 25 DEG C to the operating working temperature range, stopping reduction in the current operating temperature, and meanwhile maintaining the final temperature of the liquid metal battery at the current operatingtemperature. By the temperature regulation method, the battery capacity attenuation in the suspend mode of the liquid metal battery is reduced and additional electrical energy loss is reduced.

Description

technical field [0001] The invention belongs to the field of large-scale electric energy storage of liquid metal batteries, and more specifically relates to a method for temperature control of liquid metal batteries in energy storage applications. Background technique [0002] Large-scale electric energy storage is a bottleneck technology for efficiently utilizing renewable energy and building a smart grid, and it is also an important supporting technology for electric vehicle charging relay stations in remote areas where traditional power grids are difficult to cover. Energy storage battery is a potential electric energy storage technology, but due to the limitation of key materials and technologies, the existing battery system cannot meet the requirements of large-scale energy storage in terms of cost, life and safety. [0003] Liquid metal battery is a new low-cost, large-capacity, high-safety energy storage battery technology developed in recent years, and has broad appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/617H01M10/44H01M10/63
CPCH01M10/44H01M10/617H01M10/63Y02E60/10
Inventor 蒋凯郭振林王康丽余丽红程时杰
Owner HUAZHONG UNIV OF SCI & TECH
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