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release time:2024-03-26 Hits: Popular:AG11 battery
Why do 502030 battery not need thermal management systems? Will this advantage become the killer feature of 502030 battery?
The moment lithium-ion batteries are assembled in a car through a certain number of series and parallel combinations and become a power source, problems such as high cost, large volume, high quality, sensitive temperature adaptation, and thermal runaway safety have always troubled us.
Since 502030 battery can provide better safety, larger capacity, and faster charging, they are recognized as the development direction of the next-generation battery technology route, and have also become a battleground for upstream and downstream companies in the major battery industry:
South Korea's three major battery giants have joined forces; Japan's 23 car companies, battery, material companies, and scientific research institutions have joined forces; European and American countries have successively released research and development plans; Germany's Volkswagen invested US$100 million in battery technology companies - they have all targeted and actively Laying out 502030 battery and accelerating the commercialization of core technologies are all attempts to seize the opportunity in the future competition in the power battery market.
502030 battery have made heroes from all walks of life bend their backs. Among them, as the bodyguard of batteries, what is the development trend of thermal management systems that guarantee safety and function?
Toyota proposes 502030 battery do not require cooling
In the early days, Toyota repeatedly elaborated on the characteristics of the all-solid-state battery it developed on various occasions. In addition to the important high safety features, it also solved and satisfied the need for long driving range and fast charging characteristics. At the same time, it did not require cooling and was bulky. Can be cut in half. (The picture below shows the typical battery system cooling plate volume currently used)
In the early days, Toyota Executive Vice President Didier Leroy described it this way: Toyota is in a leading position in the intellectual property rights of solid-state battery technology, which can make batteries safer and smaller.
Let’s take a look at the key indicators of 502030 battery and explore the reasons for these characteristics.
502030 battery have outstanding heat resistance, low temperature characteristics, and rate characteristics.
Several tests from Kentaro YOSHIDA and Keizo HARADA All-Solid-State Lithium Batteries with Wide Operating Temperature Range Mitsuyasu on sulfide-based 502030 battery (mainly tests for small-capacity batteries):
High temperature tolerance test: The test conditions are constant current of 0.3mAcharge/discharge, charged to 0.3mAh, and discharged to 3.0V when the battery is charged and discharged at a high temperature of 170°C. It can be observed that the capacity is very stable at high temperatures with little change. , that is to say, there is no significant increase in side effects.
Low temperature endurance test: The battery is charged and discharged (The test conditions are constant current of 0.02mA, charged to 0.02mAh, and discharged to 3.0V) and cycle (the test conditions are constant current of 0.02mA, charged to 0.02mAh, and discharged to 3.0V) at low temperature -40°C. Under the conditions, it can be observed that the capacity is also very small due to the influence of low temperature, and there is still very stable discharge and charge.
The above test conditions do still have great limitations and gaps compared to current commercial power batteries, but the advantages of 502030 battery brought from the mother's womb are still very obvious. Under such high temperature conditions, they perform so stably and are safe. It can be seen.
For general liquid electrolyte batteries, the strategic protection is that if the temperature is >50°C, it will enter the alarm state; if the temperature is 70°C, it will enter the thermal runaway risk zone. Low temperature environment, <0℃ limits the charging current. The battery can work stably within a very narrow range of 15~45℃. At the same time, in order to ensure the life of the battery system, the temperature difference range is required to be controlled within <5°C.
In fact, the role of thermal management is first to ensure battery safety, and secondly to ensure the best performance of features and functions. The battery itself is safe if exposed to high and low temperatures. Then, the need for thermal management will be reduced accordingly.
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