Domestic graphene mobile power supply debut

However, what surprised people was that on the first day of the exhibition, they witnessed the release of a “black technology product”, which is called the graphene mobile power supply.

According to the on-site staff, this product was jointly developed by Dongxu Optoelectronics and Bicester, with a capacity of 5000mAh and a full time of 15 minutes. Among them, Dongxu Optoelectronics provides graphene materials, and Bicester is doing circuit coordination. Even more incredible is that the owner of Bicester also revealed to Lei Feng that Dongxu Optoelectronics has shipped tens of thousands of graphene batteries to Bicester.

The implication is that Samsung, Panasonic, and LG have not solved the problem, and Dongxu Optoelectronics has achieved small-scale mass production.

However, in view of the excessive speculation in the graphene concept in the past few years, we also specifically asked the industry staff in the field of Bicester and the battery field to see how the gold content of this graphene battery is?

Is it a graphene battery?

Graphene is likened to “black gold” by industry insiders and is one of the hottest concepts recently. In the past few years, the industry has exploded a number of "graphene battery" versions, for example, some are only doped with graphene powder on lithium-ion batteries. Last year, Huawei used graphene materials to dissipate heat from lithium-ion batteries. Compared with the graphene battery in everyone's mind, it is far from the same.

Dongxu Optoelectronics has been active in the research of graphene. It is one of the earliest companies in China to develop graphene materials. In July last year, the company also released the graphene-based lithium-ion mobile power source "ene king", but At that time, Wang Zhonghui, deputy general manager of Dongxu Optoelectronics, gave a conclusion to everyone. The "ene king" is not a graphene battery, but a graphene-based lithium-ion battery.

But unfortunately, this time they and Boster jointly launched a new product is not a graphene battery. The staff of Best told Lei Feng. "The positive and negative materials of this mobile power supply are still lithium materials. They just put the graphene in the middle of the battery." Obviously, it is added to the traditional lithium-ion battery. Graphene can also only be referred to as a graphene-based lithium ion battery.

He also said that graphene materials used in battery separators can enhance the conductivity of the battery, so the charging speed will be faster, and the low temperature performance will be better. The official data is free to work in the environment of -30 ~ 80 °C.

So even if the real graphene battery didn't come, it was a good battery solution.

However, is 5000mAh in 15 minutes a credit for graphene?

In the above test, we witnessed the fact that this mobile power supply can be fully charged within 15 minutes, but is this whether graphene plays a role? This industry is controversial.

According to official data from Bicester, the mobile power supply measures 158 x 65 x 24.5mm. The problem has also appeared in this size. Some people in the industry believe that the conventional lithium battery can reach a capacity of 20000mAh in this size, and the capacity of this mobile power supply is only 5000mAh, so its energy density is greatly reduced. This is also considered a means of achieving fast charging.

Energy density represents how much energy can be stored per unit volume or weight, which is proportional to battery life. As with charging speed, energy density is also an indicator that battery practitioners have been working hard to improve, but the reality is cruel, and these two indicators are often not compatible.

The industry also believes that the conventional lithium iron phosphate battery can achieve the level close to the graphene-based lithium battery introduced by Dongxu Optoelectronics and Bicester under such size specifications. This comparison seems to have come to a conclusion: Dongxu Optoelectronics and Boster's doping of graphene on the separator does not seem to bring significant performance changes, but it has increased several times in terms of cost (this product The price has reached $70). If this is the case, then it is not a happy one!

Of course, this is only a speculation in the industry. After all, Dongxu Optoelectronics and Bicester have not announced more details.

What is the secret of this product?

Careful friends may also notice that the size of this mobile power adapter is also too large, in fact, this is also a key to its ability to achieve fast charging.

According to the official introduction, this mobile power supply is equipped with an 80-watt adapter, which is not on the order of magnitude with Qualcomm QC 3.0 less than 30W. However, if you want to ensure that the speed is 5000mAh for 15 minutes, you must use this adapter, otherwise the charging speed will decrease. On the other hand, this also explains why this product uses the Type-C interface supporting PD fast charging protocol, which can support up to 20V/5A, which is 100 watts of power.

Graphene is considered to be one of the most promising materials in the future, but for now, its foam is larger than the actual application value, and there are many factors that hinder the popularization of this material. Mass production and cost are the main reasons. It is known that the product launched by Dongxu Optoelectronics and Bet is actually still in the testing stage, and when it is listed is still a question mark!

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