What are the differences between nickel-cadmium batteries and lithium batteries?

1. Large energy density: The volume of nickel-hydrogen batteries is between nickel-cadmium batteries and lithium batteries. This shows the nature of the transitional products of nickel-hydrogen batteries. Due to the difference in energy density, that is, the energy that can be stored in the same volume. Lithium batteries are 3 times that of NiMH batteries. 2. Self-discharge: Self-discharge refers to the amount of electricity that the battery will lose when it is not in use. The self-discharge of Ni-MH batteries and lithium batteries is not large, but self-discharge of Ni-MH batteries is common. Excessive self-discharge will shorten the battery life and terminate its life prematurely. Therefore, about ten years ago, low self-discharge nickel-metal hydride batteries used to be a bright spot in the promotion of nickel-metal hydride batteries, while the self-discharge of lithium batteries was negligible. This is a natural difference in chemical properties caused by the raw materials used in the two. 3. No memory effect: Ni-MH battery has obvious memory effect. Human memory is the impression left in the brain. The same is true for nickel-metal hydride batteries. Incomplete discharge or unsatisfactory charging will cause the battery to remember only the incomplete and unsatisfied state over time. The application performance is capacity decay. The lithium battery does not have this feature. Therefore, the nickel-hydrogen battery must be thoroughly discharged every time to clear the memory left behind, which is similar to brainwashing people. Lithium batteries can be charged and used at any time. Therefore, lithium batteries are a happy battery, and our users are also happy. 4. High charging and discharging platform. The voltage of a single lithium battery is 3.6V, and the voltage of a single nickel-hydrogen battery is 1.2V, the former is 3 times that of the latter. The charging method for lithium batteries is to set a termination voltage, usually 4.2V for a single cell, and there is no voltage rise or fall for Ni-MH batteries. The charging method of lithium batteries is called voltage limiting and current limiting (pressure refers to voltage and current refers to the upper and lower limits of voltage and current), while the voltage platform of Ni-MH battery is low, and constant current (a constant current) is usually used. Current) charging. Due to the different charging methods, the lithium battery charger and the nickel-hydrogen battery charger cannot be mixed. 5. Specific specifications. The market often hears the name of the special-shaped nickel-metal hydride battery, but rarely hears the special-shaped lithium battery. This is because lithium batteries are currently mainly used in products with large market capacity. If they are applied to a market with small capacity, not only the technology, but also the large cost-sharing is also a problem. However, technology and market scale issues are also improving. Some companies in the lithium battery industry are already trying to enter the new field of lithium battery applications with a positive attitude. For example, Dongguan Juda Electronics Co., Ltd., which was originally a customized manufacturer of lithium batteries, is developing special products. The research and development and processing of battery cells are the specific measures to comply with this trend. It is believed that similar practices will become one of the common phenomena in the industry in the near future. 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 article: What are the correct charging methods for lithium iron phosphate batteries?