What are the differences between lithium batteries and nickel-metal hydride batteries?

Comparison of lithium battery and nickel-metal hydride battery: 1. Large energy density: The volume of nickel-hydrogen battery is between that of nickel-cadmium battery and lithium battery. This shows the transitional product nature of nickel-hydrogen battery because of the difference in energy density. , That is, the energy that can be stored in the same volume, the lithium battery is 3 times that of the nickel-hydrogen battery. 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 nickel-hydrogen battery and lithium battery is not large, but self-discharge of nickel-hydrogen battery is common. Excessive self-discharge will shorten the battery's service time and end its life early. 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, and 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 unsatisfactory state over time. The application performance is capacity decay. The lithium battery does not have this feature. Therefore, the nickel-metal hydride battery must be thoroughly discharged every time to clear the memory left behind, which is similar to brainwashing people. Lithium batteries can be charged 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 of the lithium battery is to set a termination voltage, usually 4.2V for a single cell, and the nickel-hydrogen battery has no voltage rise and fall. The charging method of the lithium battery is called the voltage limiting and current limiting method (pressing refers to the voltage, the current refers to the current, that is, the upper and lower limits are set for the voltage and current), while the nickel-hydrogen battery has a low voltage platform and usually uses constant current (a constant current). Current) charging. Due to the different charging methods, lithium battery chargers and nickel-hydrogen battery chargers 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 new areas 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: How to make dry batteries more durable and durable?