On July 8, Dongxu photoelectric, a liquid crystal glass substrate enterprise, released its graphene based lithium-ion battery product in Beijing, which is known as the world's first graphene based lithium-ion battery. Various media reported and praised it for accelerating the pace of graphene industrialization. However, my opinion on this product is that it has no impact and basically uses the technology of tool.

First of all, from the point of product name, it's a little frugal, adding a graphene "base" lithium-ion battery, which is better than graphene battery, but in that sentence, graphene is still an additive of lithium iron phosphate in this battery, so it's still not even "base".

Then there is the product description: it is 18650 battery graphene / lithium iron phosphate composite, which is actually the most common thing for us. Let's combine it.

After that, the performance of "alkene king" is about to charge and discharge at 10C for 6 minutes, with a service life of more than 2500 times and normal use of - 30 ~ + 80. Here's 6C. In fact, it's not a rare number in the battery field. Many power batteries achieve 10C, not to mention the faster charging and discharging of micro macro batteries. It's not a new thing to charge and discharge the power type (fast charge and discharge) battery in 6 minutes. Lithium battery has a life span of thousands. You think this data is very good. In fact, it's only because of the comparison of the batteries in the common consumer electronic products. These batteries were not designed for quick charging and life-span oriented, but mostly for volume energy density oriented. But - 30 is a good data, the author is common under - 20 normal work. This can be attributed to the improvement of conductivity of graphene, which is a bright spot.

And then there's a multiplier performance

Do you see, 5C is about 110mAh/g. Anyway, our spray drying and mass production material is very easy to achieve.

The performance is good, but these comparisons are funny. It's obviously the way to "find a poor blank sample and compare it with a cow's ratio of adulterated samples" in scientific research. Most people who have done scientific research will laugh at this.

After that, the king cell made a mobile power supply.

Look at the difference: you can input 16V 5A current, that is, support fast charging, and then rely on the high current and voltage of fast charging, you can fill it with 13-15min, with a good life. It's better than the traditional mobile power supply.

Question:

1) 16V and 5A must have special converters, wires, charging circuits, etc., and need another set of stoves. As far as I know, they are also completely incompatible with the fast charging protocols of Qualcomm, oppo, etc.

2) people who have worked with batteries know that batteries can be charged quickly or slowly, except that good battery performance plays a good role in fast charging and poor performance, and some batteries are not suitable for such use. So when your cell phone battery is pulled out, it can be charged quickly, but the danger will get bigger. So for safety reasons, the standard 5v2a 5v1a charging system is used now, which locks other charging possibilities directly at the product end to ensure safety Of course, the battery with fast charge rate performance is good, which is a great credit of the product.

3) just now, Dong Xu said that he used 18650, and then this product is 4800mAH. First of all, one section of 18650 has no such large capacity, so there are only two sections. One section is divided into two sections, one section is 2.4ah This technical level is too general. (the latest progress, according to insiders, may be four sections, so one section is 1.2AH, which is too beautiful for me to watch...) However, if it is a rate cell, it can also be understood. After all, as we all know, the rate and energy density of the battery are often not both available. At last, simply put it like this, it's a multiplier battery, and it's just a good name. Batteries that can charge 4C and 15min are actually a lot on the market, which is not a rarity.

It's funny. Charge the battery and charge the system. If you get a battery for a 0.1C charging (small current) input, of course, it's not enough for a long time. What's the point of this comparison? It's like if a BMW in manual gear doesn't run fast in the first gear, you laugh at people saying that you can't do this car. There's no such reason.

The problem with this test is that it's not the same charging system used in comparison. It's not a rigorous experiment.

Finally, there is a lot of signing ceremony, no comment.

Conclusion:

You can look at the original text if you are interested. It is not difficult to find that several key data are missing:

18650 battery energy density WH / kg, wh / l power density w / kg, w / L did not say.

The cost didn't say.

Not to mention the energy density, it means that this kind of battery is installed in the car. If it is pure electric, the endurance problem can not be solved. At present, it is still the most concerned problem (I always think, endurance > fast charging)

Not to mention cost, it means the problem of mass production competitiveness. What else would the Chinese take to fight with Panasonic, Samsung and LG for bayonets?

We can't defeat the invaders with YY Anti Japanese drama. Don't forget that 77 has just passed. We should be self-improvement.