In response to the more powerful features of the 3C products, battery technology must also constantly develop initiatives in order to supply this generation of more and more hungry, more power-hungry 3C products. The most common of the four kinds of rechargeable batteries - nickel cadmium, nickel hydrogen, lithium ion and lithium-polymer in the end What's the difference? What are advantages and disadvantages of each? Xiao Jiang in this years try to find on the network to analyze the data pass on to you ...
Nickel-cadmium batteries (NiCd)
Is the oldest one rechargeable battery technology, as early as in 1899, was invented out. Nickel-cadmium batteries can withstand short-term advantage is that a large number of discharges, and the charging process is endothermic reaction - the latter feature can be quickly charged nor will it cause too much damage to the battery. Nickel-cadmium battery voltage is 1.2V, than ordinary alkaline batteries 1.5V slightly less marked, but because the process of alkaline battery discharge voltage will continue to fall, to a time when no power is usually only 1V, but nickel-cadmium batteries will be have always been to provide a stable 1.2V voltage without electricity until the date, so the majority of electronic products using alkaline batteries can be put into the nickel-cadmium batteries, no problem.
Best-known shortcomings of nickel-cadmium batteries, that is, the so-called "memory effect", that is, when the battery runs out there are still no electricity, would no longer charging, the battery will "remember" this position after the electricity used in such a long time left , the battery will occur, and do not like the response of electricity (voltage transient decrease). Therefore, nickel-cadmium rechargeable need to go through a period of pre-discharge process would be drained only after the power recharge. Most of the nickel-cadmium battery charger will have automatic discharge function.
Nickel-cadmium batteries because the charge storage than smaller (probably only alkaline batteries 1 / 4), and cadmium are toxic heavy metals, so it is less seen. Most applications have been close to its nickel-metal hydride battery (NiMH) replaced.
Nickel-metal hydride batteries (NiMH)
Nickel-metal hydride batteries and nickel-cadmium batteries are roughly the same technology, but will be replaced with the anode from the cadmium hydride only. It is most of the features and the same nickel-cadmium batteries, but electricity build higher memory effect is relatively less obvious (but actually still exist). Ni-MH battery biggest problem is that it has a high self-discharge rate, which is obviously saturated electric charge the battery, do not set aside a month, the power may be off 30 percent less of the spectrum.
The use of 5 (AA) and 7 (AAA) size battery applications, the nickel-metal hydride rechargeable batteries are currently the mainstream, but has a higher capacity to build demand, or need to do more hours of the volume, it is necessary by lithium-ion batteries by ...
Li-ion battery (Li-ion)
Lithium-ion batteries battery is almost fantastic, has a high capacity, small size, light weight, no memory effect, voltage is high, and self-discharge is small, thus not surprising that the majority see the modern 3C products were obtained using the lithium-ion ( or lithium polymer) battery has.
But the seemingly perfect lithium-ion battery is still there is a risk - the most obvious point that it has quite a high tendency to self-explosion, but will so much energy packed into such a small space, blew up and is very spectacular to be expected a. In order to avoid a dangerous place, lithium batteries must be lots of protective measures, in the battery charging and overshoot or overheating, and automatic power off. These additional circuits and institutions, is why there is no III / IV-size lithium-ion batteries, and why such a high price of laptop battery reasons.
Lithium-ion batteries have a relatively little-known interesting characteristics, that is, whether you have not used it, it will be the largest build capacity battery materials with oxidation decreased gradually. In general at room temperature, the lithium-ion batteries build power will decline approximately 20% per year, and the higher the temperature, charge survived eat, down fast survived. So if you have a notebook cooling relatively poor, then a long time to full power at 60 ° c environment lithium battery can lose 40% within three months of the build electricity.
The following are maintenance lithium battery suggestions:
Do not use electric light only rechargeable - lithium batteries do not like to be discharged into the finish, so if you often find themselves at the laptop's power use dry, then it changed the battery bar bigger stars!
Do not charge to full power over - as I said before, battery charging and the more saturated, has the power has fallen even faster, so keep 60 to 80% saturation is the best state. In addition to Panasonic's pen seems a pity that foreign power, to achieve this is not easy.
Every 30 ordinary charge and discharge, we must come to a "use dry" discharge - Lithium-ion battery itself is not afraid of a short time, a small amount of the charge and discharge, but the abovementioned protection circuit may thus misjudge the battery is now in the end how much power there. A major electrical discharge to dry, and then charge to full-saturation should be able to protect the loop "correction" to come back. Many laptops have a software or even where in the BIOS to provide such functionality.
Laptop with AC power source, pull the battery down - this is because the previous build, said the decline in power. Pull the battery down, at least it do not have access to the computer itself, the heat. If the battery then throw the fridge, better ...
By closing time the battery to stay about 40% of the electricity on the inside - leaving too many questions will build capacity reduced, leaving too little may damage the battery. Nansi Hou really ah!
Buy batteries have to buy new - a new batteries have full power Oh! Lithium-polymer battery (Li-Pol)
Lithium polymer batteries and lithium-ion batteries, like the principle, only part of the polymer electrolyte instead. This makes lithium-polymer batteries can be molded into a variety of shape (a good thing for consumers is not ==), in line with demand to be different. Lithium-polymer batteries are also safer than lithium-ion batteries to high temperature, impact, but there are still overcharge when the risk of explosion. Other maintenance principles are the same, and lithium-ion battery (so prefer to use mobile phone lithium battery charging every day, do not use photoelectric and we have to charge).
