LED rechargeable lithium-ion battery flashlight repair method

　　Author ：Iflowpower – Portable Power Station Supplier

LED rechargeable lithium-ion battery flashlight repair Refreshing a YG-859LED charging flashlight Then, remove the flashlight check. In order to facilitate maintenance, the circuit principle of physical mapping will be elaborated according to the actual situation, and the reference is available for maintenance. This charging LED flashlight is relatively simple.

This is a limit stream and the upper end 220V AC power supply of C1 and R composed of current flow and charge release circuits is positive. Current C1,→D1→Sliding switch battery→Battery negative→→D4 - 220V AC power supply. When the lower end of the 220V AC power supply is timing, the current passes D3→Sliding switch, battery positive→Battery negative→D2→C1→Go back to the negative electrode of the 220V AC power supply.

At the same time, all other battery anodes, charging indicates that the D5-330 of the D5-330 after the LED is currently returned to the negative surface of the 220V AC power supply. When the slide switch is illuminated my file position, white LEDL, 3, 5, 7, 9, sliding the switch in the file position, except white LEDL, 3, 5, 7, 9, white LED2, 4, 6, 8 also illuminates . Check all components in flashlights,φDiscover red charging indicates that the light-emitting diode D5 reverse leakage phenomenon, after the new change, charging 12 hours, the fault is still.

This problem, the general problem is in the battery, because such flashlight prices, manufacturers use miniature-free storage batteries in order to reduce processing costs, this battery is very short, most use is less than a year and a half It is the battery electrolyte evaporation caused by the decrease in battery capacity. Maintenance is to replace new batteries or repair batteries. Due to this battery supply in the market, it has been in accordance with the repair of the battery, there is no effect, ready to throw the flashlight.

Imagine that the digital camera in his hand has eliminated 5 nickel-hydrogen rechargeable batteries in the hand, and the four batteries stop working for a long time, leading to different levels of aging. According to the sealing treatment, the heating treatment is performed after the high pressure cooker is placed, some effects, but use digital cameras or not. According to the principle of waste use, these four nickel-hydrogen batteries are welded in series to form a nickel-hydrogen battery pack, remove the original battery, and connect the nickel-hydrogen battery pack to the original battery.

Turn on the sliding switch to test, the flashlight restores normal work. As can be seen from the above figure, the flashlight is a battery, charging is controlled by sliding switch. For safety, do not try to pull the lighting switch when the flashlight is charged.

The charging current of the battery is determined by the current limiting capacitor C, the formula is as follows: c = 14.5i. The unit of C is Fi.

The derived step of the formula is as follows: assuming that the capacitance C in the 50 Hz AC circuit is XC-1/2? C = 1 / 2x3.14x50xc, i = u / XC = 220x2pi? C = 220x2×3.14×50c, then c = I / 220×314, here C unit is f (Fara), i is A (ampere), using national international units.

If I convert C's unit to f, in order to keep the equation, I must multiply the right side by 106.≈14.471 Canadian dollars.

It can be used as C = 14.5i. According to the formula C = 14.

5i, the total current of the charging circuit is basically consistent with the actual measurement of 69.7 mA. Even if the current consumed in D5 is not considered, the full charging time of 2300mAh batteries is estimated to be 33 hours.

But this is enough. After observing, full of electricity, normal intermittent use, no problem for a month.