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はじめに

Here I am rebuilding, actually more building, a battery of the electric screw driver. The original battery is no longer available so I decided to build my own i order to continue to use the screwdriver. The battery cell I am using are 4/5 SC (sub C) size. Meaning they are 4/5 the size of a C-Cell. They are 23 x 34 mm in size with a capacity of 2000mAh and 1.2 Volts.

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  1. Repairing Black and Decker 9074 Screwdriver  Battery, Repairing Black and Decker 9074 Screwdriver  Battery: 手順 1、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery, Repairing Black and Decker 9074 Screwdriver  Battery: 手順 1、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery, Repairing Black and Decker 9074 Screwdriver  Battery: 手順 1、 3の画像 3
    • Here is the original battery. Three cells surrounded by a soft plastic sheathing

    • Cut the plastic (I used a utility knife) away.

    • Now the three cells are clearly visible and the way they are connected in series. Meaning positive from one cell to negative on the next cell. Each cell separated by a rubber insulator

  2. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 2、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 2、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 2、 3の画像 3
    • Top to bottom on this image shows the insulator that is on the top portion of the cells. Next are the old three cells and bottom the new cells.

    • The contacts on the old cells appear to be spot welded to make the connection.

    • Separate the connections with either a pair of side cutters or a pair of scissor. This will allow you to remove the insulators.

  3. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 3、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 3、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 3、 3の画像 3
    • Here all the cells are separated and the insulator removed

    • Plenty of corrosion visible on each of the old cells.

    • To prepare the new cells, the heatshrink insulation from the contacts need to be removed. I used a utility knife to remove that.

  4. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 4、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 4、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 4、 3の画像 3
    • Here is the first cell, insulation removed. Prepare all cells like that.

    • Align the positive contact of the first cell with the negative contact of the second cell.

    • Since the contacts will be soldered to each other, I did use some flux on the contacts prior to soldering.

  5. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 5、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 5、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 5、 3の画像 3
    • Apply the flux to the contacts, in my case I used a cotton swab.

    • Once proper alignment is obtained, I use a alligator clip to hold them in position.

    • Now solder the contacts together. I used a 30watt soldering iron with a blunt tip.

  6. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 6、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 6、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 6、 3の画像 3
    • Here is the first attempt. Luckily I noticed that I had forgotten to install the rubber insulator before going on to the next cell. Desolder the contacts to rectify this.

    • Here is the next cell properly prepared.

    • First two cells, separated by the insulator, soldered together.

  7. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 7、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 7、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 7、 3の画像 3
    • 2nd and 3rd cell prepared and being aligned.

    • Applied flux and alligator clip to hold it in alignment.

    • Solder the contacts together

  8. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 8、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 8、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 8、 3の画像 3
    • All three cells soldered together, positive to negative end, creating a series connection.

    • The original battery was wrapped in some soft plastic. I decided to use 1 1/4 inch heat shrink tubing. Black electric tape might work just as well, but I used what I had on hand.

    • Heatshrink tubing placed over the cells

  9. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 9、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 9、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 9、 3の画像 3
    • I placed a clamp from end to end. This will prevent any exposure to hot parts, will allow movement of the battery and still maintain alignment.

    • Here is the two speed heatgun I use for my projects.

    • Simply apply constant heat to the tubing by moving the heatgun along the heatshrink tubing.

  10. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 10、 3の画像 1 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 10、 3の画像 2 Repairing Black and Decker 9074 Screwdriver  Battery: 手順 10、 3の画像 3
    • Here is the battery with the heatshrink tubing attached.

    • Obviously the contacts are being than the connector. (The corrosion visible on the connector was cleaned of during the installation)

    • Trim the contacts with either a pair of sidecutters, or like in my case, use a pair of scissors.

  11. Repairing Black and Decker 9074 Screwdriver  Battery: 手順 11、 1の画像 1
    • Once the contacts are trimmed to size, the battery is ready for installation into the screwdriver. There is a separate guide for that. Total cost for this was around $9.00 for the cells.

終わりに

To reassemble your device, follow these instructions in reverse order.

4 の人々がこのガイドを完成させました。

oldturkey03

メンバー登録日: 2010年09月29日

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2 件のコメント

What are the specs on the batteries, and where did you get them? I don’t see any on mine. Thanks!

TerryG - 返信

Thanks for the instructions.. Just a small point, when applying the heat gun (for thermal shrinking application) I think you better tell to use insulators or some kind of n insulation for the metal clamp, to avoid short circuit.. But thanks for all this anyways…

facehobi - 返信

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