Nickel -hydride battery design method

　　Step of nickel -metal hydride battery design:

　　(1) Determine the number of single batteries and working current density in the combination of nickel -metal hydride batteries.

　　a. Determine the total work voltage, working current and other indicators of the nickel -metal hydride battery group according to the user's requirements. Select the battery series, refer

　　(Experience data or obtained through experiments) determine the working voltage and working current density of the monomer battery.

　　b. Determine the number of single batteries in the battery pack. Number of single batteries = total work voltage/single battery voltage of the emperor group

　　(2) Calculate the capacity of nickel -metal hydride battery

　　a. Calculate the rated capacity according to the required working current and working time.

　　The rated capacity = working current × working hours

　　b. Determine the design capacity.

　　Design capacity = rated capacity × design coefficient, the design coefficient is set to ensure the reliability and service life of the battery, generally 1.1 ~ 1.2.

　　(3) Calculate the amount of activated substances of nickel -metal hydride batteries

　　a. Control the active material dosage of the electrode.

　　The active material dosage of the control electrode in a single battery = design capacity × electrification equivalent/utilization rate

　　b. Non -controlled electrode active material dosage.

　　The active material dosage of non-controlling electrodes in a single battery = design capacity × electrification equivalent × excess coefficient/utilization coefficient is generally between 1 ~ 2. For example, Mi-Ni batteries often take 1.3 ~ 1.7.

　　(4) Design of electrode poles (determine the total area of the electrode, the number of electrodes, the amount of the single -chip electrode material, and the thickness of the single -chip electrode).

　　a. Calculate the total area of the electrode according to the working current and the selected working current density (to control the electrode).

　　The total area of the electrode = working current/working current density

　　b. According to the maximum size of the battery, select the appropriate electrode size and calculate the number of electrodes.

　　The number of electrodes = total area/pole area of the electrode

　　c. Calculate the amount of single -chip electrode active substances based on the amount of positive and negative active substances and the number of electrodes.

　　Single -chip positive (negative) pole material dosage = single -negative electrode material dosage/single positive (negative) pole number number in the single battery

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