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| equipment:mainroom:spot_welder [2024/05/09 18:33] – jon_alston | equipment:mainroom:spot_welder [2024/11/19 21:42] (current) – external edit 127.0.0.1 | ||
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| + | Fire if they are punctured or short circuited. Thermal runaway. Cooling the cells is the best way to prevent neighbouring cells from also catching fire. Do we want to suggest water for this? Otherwise a bucket of sand can be used to limit the impact of the fire somewhat | ||
| + | When working with lithium batteries care must be taken to avoid metallic objects coming into contact with the cells as this could cause a short circuit. It is advisable to cover the ends of cells that are not currently being welded with tape to prevent accidental contact. | ||
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| + | ===== Introduction ===== | ||
| + | A spot welder operates by passing an electric current through metal sheets, generating heat at the point of contact and causing them to fuse together. This process creates localised welds known as " | ||
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| + | This is our spot welder: | ||
| + | ***Picture of it*** | ||
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| + | What Can I Use the Spot Welder For? | ||
| + | The spot welder is for attaching thin pieces of metal together. This is commonly done in the assembly of lithium batteries. | ||
| + | ****Other uses of a spot welder | ||
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| + | [[https:// | ||
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| ===== Instructions ===== | ===== Instructions ===== | ||
| - | === Basic Guidelines | + | === Setup and Preparation for a Spot Welding |
| - | * Bullet point | + | * Clear the area of of metallic objects that could cause an accidental short. |
| - | * Another bullet | + | * Material Preparation: |
| - | * Yet another | + | |
| + | === Setting Up the Welder === | ||
| + | * Turn the welder on | ||
| + | * Ensure the spot welder is securely connected to a suitable power source and turned on. Provide more detail about the order in which is should be turned on. Plug in kettle lead, plug in foot pedal, plug in welding pen, turn on switch below kettle lead. Include pictures of the kettle plug and switch, foot plug, and welding pen jacks. | ||
| + | * Need to select automatic or manual mode, this is prompted once it boots up (or maybe it is set when it's turned on depending on whether the foot pedal is pressed or not) | ||
| + | * In manual mode the pulse is triggered when holding down the foot pedal, in automatic mode it is triggered shortly after the device detects that both electrodes have made contact | ||
| + | * At this point if the electrodes are shorted a warning will be displayed | ||
| + | * If it is booted up correctly the screen will now display the energy that will be used for the next weld and it is ready to go | ||
| + | * The energy can be adjusted with the dial | ||
| + | * When welding pure nickel strips onto 18650 cells the manufacturer suggests 20J for 0.1 mm thick strips, 50J for 0.2 mm, and 100J for 0.3 mm. | ||
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| + | === Making a Spot Weld === | ||
| + | * Clamping: Position the metal sheets between the electrodes of the spot welder, ensuring proper alignment and contact. Firmly push both electrodes down to the weld material at a slight angle as shown below. Make sure that the electrodes do not touch each other, or you will likely weld them together instead. | ||
| + | * Activation: Trigger a pulse by stepping on the foot switch - and keeping your foot down. Don’t be frightened, the cables will jump from the high current flowing through them, and the weld spot may emit sparks. You’ll see the LCD illumination dim briefly - this is done on purpose to save power during the pulse. | ||
| + | * Listen to the sound from the welder, as it tells you if the welding process has succeeded or not: | ||
| + | a. one short beep signals success | ||
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| + | b. a higher tone, followed by a lower tone, signals that something went wrong | ||
| + | * Cooling: Allow the welded area to cool sufficiently before removing the electrodes, ensuring the integrity of the weld joint. | ||
| + | * When finished reading, release your foot from the switch. The results disappear from the LCD and the welder is instantly ready for another | ||
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| + | === After spot welding === | ||
| + | * Inspect the weld for quality and integrity, addressing any defects or inconsistencies as needed. | ||
| + | * Clean the electrodes and workspace to maintain optimal welding conditions and prevent contamination in future welds. | ||
| + | * Turn off | ||
| + | * Clear the area of left over metal pieces | ||
| + | * Place the main box back on the shelf?? It must be positioned in a way that allows the cooling fan to draw in air to cool the discharge resistor. | ||
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| + | ===== Further learning ===== | ||
| + | === Spot Welder Components === | ||
| + | * The box consists of multiple components, many of which from keenlab, | ||
| + | * kWeld complete kit | ||
| + | * kCap ultracapacitor module | ||
| + | * kSupply high current voltage regulator and charger | ||
| + | * Power supply | ||
| + | * Power resistor | ||
| + | * Cooling fan | ||
| + | * Think it's the Fujitsu DPS-800GB | ||
| + | * U.S. Solid 70B Integrated-style Welding Pen https:// | ||
| - | === Another heading | + | === Maintenance |
| Some content | Some content | ||