Secondary battery with high-ratio discharge characteristics and production method of secondary battery
A high-rate discharge, secondary battery technology, applied in secondary battery manufacturing, battery pack components, circuits, etc. The effect of low connection resistance and good high-rate discharge performance
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[0037] Example 1
[0038] Adopt SC nickel-metal hydride battery with nominal battery capacity of 2500mAh, the positive plate and the cap are connected with 3 tabs, the tab spacing is 6.0mm, the positive plate spot welding depth is 0.5mm, and the tabs are made of pure nickel tape , The size is: width 3.5mm, thickness 0.10mm, the number of welding points of the positive pole ear is 1 point, and the battery internal resistance of this battery is 25mΩ. The battery discharges under the discharge current conditions of 0.2 rate (0.5 ampere), 1 rate (2.5 ampere), 20 rate (50 ampere), 0.2 rate discharge capacity can reach 65% of the nominal capacity, and 1 rate discharge capacity can reach the nominal capacity 49% of the capacity, the 20-rate discharge capacity is zero.
[0039] A method for preparing the above-mentioned secondary battery with high-rate discharge characteristics, the method includes the following steps:
[0040] 1) According to the number and position of the positive elect...
Example Embodiment
[0053] Example 2
[0054] Adopt SC Ni-MH battery with nominal battery capacity of 2500mAh, the positive plate and the cap are connected with 3 tabs, the tab spacing is 6.0mm, the positive plate spot welding depth is 1.0mm, and the tabs are made of pure nickel tape , The size is: width 3.5mm, thickness 0.10mm, the number of welding points of the positive pole lug is 2 points, the battery internal resistance of this battery is 21mΩ. The battery discharges under the discharge current conditions of 0.2 rate (0.5 ampere), 1 rate (2.5 ampere), and 20 rate (50 ampere). The 0.2 rate discharge capacity can reach 69% of the nominal capacity, the 1 rate discharge capacity can reach 55% of the nominal capacity, and the 20 rate discharge capacity is zero.
[0055] The preparation method of the above-mentioned secondary battery is as shown in Example 1.
Example Embodiment
[0056] Example 3
[0057] Adopt SC Ni-MH battery with nominal battery capacity of 2500mAh, the positive plate and the cap are connected with 3 tabs, the tab spacing is 6.0mm, the positive plate spot welding depth is 1.5mm, and the tabs are made of pure nickel tape , The size is: width 3.5mm, thickness 0.10mm, the number of welding points of the positive pole lug is 3, the battery internal resistance of this battery is 18mΩ. The battery discharges under the discharge current conditions of 0.2 rate (0.5 ampere), 1 rate (2.5 ampere), and 20 rate (50 ampere). The 0.2 rate discharge capacity can reach 86% of the nominal capacity, the 1 rate discharge capacity can reach 67% of the nominal capacity, and the 20 rate discharge capacity is zero.
[0058] The preparation method of the above-mentioned secondary battery is as shown in Example 1.
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