Low-capacity nickel hydrogen battery
A nickel-metal hydride battery, low-capacity technology, used in nickel batteries, alkaline batteries, etc., can solve the problems of low discharge voltage, rapid decay, short cycle life, etc., to suppress expansion, ensure stability, and reduce ohmic internal resistance. and the effect of polarization internal resistance
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Embodiment 1
[0022] for figure 1 For the low-capacity Ni-MH battery shown, see Table 1 for battery performance data using positive electrodes with different thicknesses, and see Table 1 for the 10C rate discharge curve. Figure 4 . Figure 4 The middle abscissa is the discharge capacity (Ah), and the ordinate is the discharge voltage (V).
[0023] Table 1
[0024]
[0025] From Table 1, image 3 According to the data in the data, as the thickness of the positive plate decreases, the internal resistance of the battery decreases, and the 10C discharge platform rises more obviously. ) is higher. Under the condition of ensuring the battery capacity, reducing the electrode thickness and increasing the electrode area essentially reduces the current carried by the electrode unit area, thereby reducing polarization and improving the uniformity of current distribution.
example 2
[0027] use figure 1 The low-capacity Ni-MH battery shown (Example 2) and the low-capacity Ni-MH battery (Comparative Example 1) using the prior art are shown in Table 2 for the changes in the thickness of the electrode group after charging at 1C and discharging at 10C for 100 cycles.
[0028] Table 2
[0029]
[0030] As can be seen from the data in Table 2, the positive and negative thickness expansion in Example 2 is obviously lower than that in Comparative Example 1.
example 3
[0032] use figure 1 Shown low-capacity nickel-hydrogen battery (embodiment 3) and the low-capacity nickel-hydrogen battery (comparative example 2) that adopt prior art, in 1C charge, 10C discharge influences on the high-rate discharge performance see respectively Figure 5 , 6 . Figure 5 , 6 Among them, 1# represents embodiment 3, and 2# represents comparative example 2. Figure 5 The middle abscissa is the charging time (hour), and the ordinate is the charging voltage (volt). Figure 6 The middle abscissa is the discharge time (hour), and the ordinate is the discharge voltage (volt).
[0033] From Figure 6 It can be seen that the discharge time and discharge voltage of Example 3 are larger than those of Comparative Example 2.
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