What are the advantages of nickel-metal hydride batteries and lithium batteries

Nickel-metal hydride batteries are composed of hydrogen ions and metallic nickel. They have 30% more power reserve than nickel-cadmium batteries, lighter than nickel-cadmium batteries, and have a longer service life. They are environmentally friendly and have no memory effect. The disadvantage of nickel-metal hydride batteries is that they are much more expensive than nickel-cadmium batteries, and their performance is worse than that of lithium batteries. Advantages: low price, strong versatility, large current, environmental protection and stability (compared with lithium) Disadvantages: heavy weight, shorter battery life, intolerance to overcharge (compared with lithium) The design of nickel-hydrogen batteries is derived from nickel-cadmium batteries However, great progress has been made in improving the memory effect of nickel-cadmium batteries. The important change is the replacement of cadmium originally used in the negative electrode with hydrogen storage alloys. Therefore, the nickel-hydrogen battery is said to be a typical representative of material innovation. The pollution caused by nickel-metal hydride batteries is much smaller than that of nickel-cadmium batteries containing cadmium. Therefore, nickel-cadmium batteries have been gradually replaced by nickel-metal hydride batteries. Recently, digital cameras use more and more nickel-metal hydride batteries. Battery manufacturers are also optimistic about this market. They have launched high-capacity nickel-metal hydride rechargeable batteries. This has made the technology of nickel-metal hydride batteries advance by leaps and bounds. The batteries are on par, and even the charger is getting better and better, and the charging time is greatly shortened. Lithium batteries are a type of batteries that use lithium metal or lithium alloy as the negative electrode material and use a non-aqueous electrolyte solution. Advantages: no memory effect, lighter weight Disadvantages: high cost, low current, intolerant of over-saturation (compared with nickel-metal hydride) lithium batteries have a primary lithium battery (non-rechargeable) and a secondary lithium battery (rechargeable), and a secondary lithium battery It is divided into Li-ion lithium battery and Li-Polymer lithium polymer battery. Generally, digital cameras usually use secondary lithium batteries (rechargeable). Compared with Ni-MH batteries, the weight is lighter than Ni-H, and the volume-to-energy density ratio is 48% higher. Because of this, the processing and sales volume of lithium-ion secondary batteries is gradually surpassing Ni-MH. This kind of battery has low self-discharge and no memory effect. The number of charge and discharge times can reach more than 600 times. Especially the Li-Polymer battery developed in recent years. In addition to its smaller size, it is not affected by the cylindrical or square battery. The appearance is limited, and the weight is lighter. Lithium batteries are not resistant to overcharging, and there is a danger of explosion if carelessly, so a built-in control IC is needed to guard against overcharging, but the cost is relatively high. Because the specifications of lithium batteries are not uniform, they will be different The battery cannot be purchased after the production is discontinued. However, in order to overcome this problem, many manufacturers can also reduce the inventory and unify the lithium batteries. For example, FUJIFILMNP-60 and CASIONP-30 have the same specifications, so they will not change the battery. Chargers, batteries, etc. must be replaced accordingly. There are also Taiwanese manufacturers that can support a variety of battery chargers (EX. Smart LCD fast charging dock (global voltage + socket)), when changing the model, just change the socket. There is also a more difficult problem with lithium batteries, which is the issue of environmental protection. Because lithium batteries contain many toxic substances, all lithium batteries must be recycled and cannot be discarded anywhere. 1. Volumetric rechargeable lithium battery has the advantages of small size (relatively), lighter weight, low self-discharge rate, and no memory effect compared with ordinary nickel-cadmium/nickel-metal hydride batteries, and is widely used in many new mobile devices. The batteries of mobile devices such as mobile phones, laptops, and PDAs that we usually use have gradually been replaced by lithium batteries. The memory effect of Ni-MH batteries is not very clear, one thing. When you need to use it urgently, you don't have to charge it after lighting up. It is best to charge it after lighting up. 2. Electricity Lithium battery has large energy and small battery; the voltage of a single lithium battery is 3 times that of nickel-hydrogen battery; there is no memory effect, and it can be charged as needed. But it can't be charged at one time, so too many charge and discharge times will affect the life of the battery. Lithium batteries are not suitable for long-term storage, as they will lose part of their capacity permanently. It is best to store it in the freezer of the refrigerator after charging 40%. 3. Charging method The charging requirements of lithium batteries are different from nickel-cadmium/nickel-metal hydride batteries. The single voltage of rechargeable lithium batteries is 3.6V (some battery blocks may be nominally lithium-saving batteries). Lithium batteries are generally charged with voltage-limiting and current-limiting methods. If a friend wants to charge lithium batteries independently, please note that its charging method is different from the constant-current charging method used by nickel-cadmium/nickel-metal hydride batteries, and ordinary nickel cannot be used. Charger for cadmium/nickel-metal hydride batteries. Although nickel-metal hydride batteries and lithium batteries are different, they are both new energy batteries in the current era, and they have played an irreplaceable purpose for the progress of human life! Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Comparison of the use of lithium iron phosphate batteries and lead-acid batteries in base stations