Liquid cooling technology, Now with the rapid development of trams, as the charging speed accelerates,
the current and voltage will also increase linearly, which leads to an increase in the power of the inductive module of the charging pile.
The heat of components such as inductor modules and power modules is generated quickly and in large quantities.
How to dissipate heat generated during charging
We use electric vehicles on the way to charge because the operation will generate a lot of heat, so we have to think about how to dissipate this heat in time.
Liquid cooling technology just solves this problem,
if the heat is not distributed in time, it will cause the trolley to overheat,
and it is easy to have an accident. This endangers personal safety, so this is a problem that must be solved in the construction of charging piles.
If there is no rapid cooling, the device temperature is too high,
which will lead to the device function reduction or even failure and may cause flammable materials to catch fire.
The cooling method of liquid cooling is displayed in the form of liquid, and the heat is dissipated by indirect contact,
which has a high heat transfer efficiency (0.5-10), and the battery energy density is high in charge and discharge speed to ensure the uniformity of cooling. The technology is also relatively mature.
And the sound generated is relatively small, in the room, with almost no noise running. And not much affected by the weather. Seasonal volatility is also relatively low.
Therefore, the liquid cooling mode has gradually become the mainstream mode of the “fast charge” charging pile cooling scheme.
Liquid cooling technology is maturely used in life
Liquid cooling technology is not a new thing, the industry is generally used,
including cars that have a lot of liquid cooling, like conventional engines have these things.
The charging pile is completely out of high-power charging needs, high-power charging if you do not add liquid cooling,
to carry such a large current, you must make the wire very thick, in order to ensure that the heat can be controlled within a certain range.
Therefore, this forces everyone to use liquid cooling technology in order to meet the needs of high-power charging,
but also to provide services to ordinary people who need the small and convenient characteristics of charging piles.
The complexity of liquid cooling technology
Liquid cooling technology itself is not complex, but considering the application scenario of electric vehicles, like now have been in 1000 volts, later to 1250 volts,
safety requirements may not be the same as traditional applications, such as thermal failure,
a point of the base resistance suddenly becomes large, resulting in a rise in temperature,
must have better monitoring means to deal with these key points.
However, there are some special places, such as where the connector contacts and it is difficult to install the temperature sensor.
For a variety of reasons, the temperature sensor itself is a low-pressure thing,
but the contact point and with a thousand volts of high pressure,
so the middle adds insulation and so on, resulting in uncertainty.
In fact, there are a lot of technical details that need to be considered,
that is, how to provide cooling while being safely monitored.
In fact, we are now doing this ChaoJi interface, including UltraChaoJi interface research in the middle of spending considerable effort to solve this problem.
Now on the international level, basically we spend the longest time discussing these problems,
and abnormal how to do, this is actually the key consideration of the liquid cooling system,
including the failure of some equipment, the sudden contact of the local position has changed how to quickly and accurately monitor it needs to be carefully studied.