A newly purchased phone can last a day on a single charge, maintaining normal use for an extended period. However, as the phone is used for longer periods, the battery becomes less capable of holding power, making battery life a major issue after prolonged use. Therefore, battery performance is a significant headache for all major phone manufacturers.
All mobile phone manufacturers are seeking breakthroughs to make some changes to mobile phone batteries, but so far no best solution has been found. Even Apple, which makes excellent mobile phones, has a big problem with battery life and has not made many innovations. Some of its mobile phones even have lower battery capacities than domestic mobile phones.
Subsequently, many domestic mobile phone manufacturers launched fast charging, especially OPPO, which is famous for its fast charging. From the initial 180,000W super fast charging to the current 540,000W fast charging on the market, these fast charging technologies cannot fundamentally solve the problem. This is because they only increase the charging frequency and speed of the phone, but do not truly solve the phone's problems. In fact, they can create more problems, which is something that many mobile phone manufacturers dream of achieving.
Most mobile phones still use lithium-ion batteries, so why are graphene batteries starting to circulate in the market? Graphene has been anticipated for a long time, so why do mobile phones still use lithium-ion batteries? Is 54W fast charging outdated? Why do mobile phone manufacturers still use lithium-ion batteries instead of graphene batteries? These are questions in the minds of many netizens.
Graphene batteries have a higher density and can increase battery life by about 50-60%. Graphene can also be used to make mobile phone screens. What is the difference between graphene technology and 540,000 fast charging? Why do mobile phone manufacturers still use lithium-ion batteries? Because graphene has very strong heat dissipation performance, and the battery heat dissipation is better.
While graphene batteries are undoubtedly excellent, graphene itself is extremely expensive to produce. When graphene was first discovered, one gram cost as much as 2000 RMB. Therefore, the cost of widely applying graphene technology to mobile phone batteries would be incredibly high. Although the cost of graphene is gradually decreasing, and it's not impossible for graphene-based phones to be used in the next few years, the current cost is simply too high. Do you think we might be able to use graphene batteries in the future? 3. Overcurrent protection: When the operating current exceeds the set value, the protection IC cuts off the MOSFET. Once the operating current returns to the allowable voltage, the MOSFET is turned on again.
Overcurrent voltage drop: 0.1V. Here, the protection IC judges the voltage drop that occurs when current flows through the MOSFET. Dividing this voltage by the MOSFET's on-resistance gives an approximate overcurrent protection current, which is typically around 3~5A.
Overcurrent delay: 8 milliseconds. Note that this delay is much shorter than the delays of the previous overcharge and overdischarge scenarios.
4. Short circuit. This function is actually an extension of overcurrent protection. When the protection IC detects that the voltage between the positive and negative terminals of the battery output is less than the specified value, it considers the battery to be in a short circuit state and immediately disconnects the circuit. The circuit is restored after the short circuit fault is cleared. During a short circuit, the voltage between the positive and negative terminals of the battery output is zero, but the actual voltage of the battery cell is still normal.
