What are the types and characteristics of nickel-metal hydride batteries?

Types of Ni-MH batteries Ni-MH batteries can be classified according to different characteristics. In addition to standard or general-purpose nickel-hydrogen batteries, from the perspective of special use effects, there are both high-rate type, high-capacity type, and low-temperature and low-temperature batteries. High temperature type. Generally speaking, the above-mentioned types of nickel-metal hydride batteries are put together to form the performance classification of nickel-metal hydride batteries. 1. Standard type: It has general standards for nickel-hydrogen storage batteries. These standards are composed of the following characteristics: (1). The service life should be between 500 and 1000 times. (2). Sealing and leak-proofing make the nickel-hydrogen storage battery maintenance-free. At the same time, the safety of the battery is effectively guaranteed under the normal state of use and storage. (3) The performance is stable, and it can be used in a wide range of humidity and temperature. The battery has low internal resistance and remains stable after high current discharge. Voltage, (4), scope of application: emergency lights, cordless phones, portable phones, remote controls, electronic dictionaries, toys, etc., almost all mobile power sources without special requirements can be used. 2. High-capacity type (S type): In addition to the characteristics of a standard battery, the battery is made of polymer materials with excellent performance and strict processing technology is adopted, so it can supply energy for a long time to electrical appliances According to this, it is unscientific for some people to call high-capacity nickel-metal hydride batteries also called long-life batteries, because the important advantage of this kind of power lithium-ion battery is high capacity, although it can be expressed as a long time life and stable performance, but Starting from the different meanings of the life and capacity of the Ni-MH battery, the high capacity can better explain its characteristics. This battery is mainly suitable for digital cameras that consume more power. The characteristics of nickel-metal hydride batteries show the charging and discharging characteristics of working characteristics, the self-discharge characteristics and long-term storage characteristics of storage characteristics, and the comprehensive cycle life characteristics and safety characteristics. They are all determined by the structure of the storage battery, manifested in the environment, and their distinctive feature is that they are greatly affected by temperature and current. 1. Charging characteristics: When the charging current of the Ni-MH battery increases and/or the charging temperature decreases, the charging voltage of the battery will increase. Generally, a constant current charge of not more than 1C is used at an ambient temperature between 0°C and 40°C, and a higher charging efficiency can be obtained by charging between 10°C and 30°C. If the battery is often charged in a high temperature or low temperature environment, it will cause the performance of the power lithium-ion battery to decrease. For fast charging above 0.3C, charging control measures are indispensable. Repeated overcharging will also reduce the performance of the battery. Therefore, protection measures for high and low temperature and high current charging must be in place. 2. Discharge characteristics: The discharge platform of the nickel-hydrogen battery is 1.2V. The higher the current, the lower the temperature, and the battery discharge voltage and discharge efficiency will decrease. The maximum continuous discharge current of the battery is 3C. The discharge cut-off voltage of the battery is generally set to 0.9V, and the IEC standard charge-discharge mode is set to 1.0V, because a stable current can generally be supplied below 1.0V, and a slightly smaller current can be supplied below 0.9V, so , The discharge cut-off voltage of nickel-metal hydride batteries can be regarded as a voltage range of 0.9V to 1.0V, and some batteries can be subscripted to 0.8V. Under normal circumstances, if the cut-off voltage is set too high, the battery capacity cannot be fully utilized, otherwise, it is easy to cause the battery to over discharge. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the charging methods and advantages of energy storage lithium iron phosphate battery pack?