The model of DIY - lithium-ion batteries The choose and buy - Assembly - Soldering process is introduced

Source: 2020 - 04 - 11 18:58 hits: models lithium battery DIY - time Optional - Assembly - Soldering most electric cars from lithium polymer batteries. Because of the model helicopter and more rotorcraft using battery capacity is larger, a battery charging and discharging cycle after hundreds of times will be scrapped, after so players need to replace the battery. Large capacity battery is very expensive, in order to save money, you need to find a cheaper way. The author in the taobao, the price of the battery is cheaper, they assemble the same capacity that is needed is the price of the battery pack 1/2 ~ 1/3 of the finished battery pack. Here introduces the batteries battery assembly method and the skill, provide the reference for the mould friend. One on taobao, buy battery there are many kinds of mobile phones. Used in model aircraft batteries need higher C discharge rate, but the higher the C value, the battery is heavier, the higher the price also. Due to self-assembly is the large capacity battery, so you will not need to seek high C value, as long as can meet the discharge current, there are 15 C is enough. From the outside, are connected by a high discharge rate batteries battery copper lead relatively wide, such as 5000 mah / 25 c battery pole piece width is about 15 mm. It is important to note that the negative wire of lithium-ion batteries is nickel plated pure copper, the anode lead is pure aluminium. Because of tin on the aluminum plate can't so manufacturers to its pressure can ensure welding welding nickel plated copper. However, there are some batteries without this treatment can direct sales, so you should ask before buying businesses, so that it can't assembly. To prepare assembly batteries, each battery voltage is measured with a digital voltmeter ( Generally in 3. Around 9 v) , forming a set of similar voltage of the battery. Figure 1 battery factory, because of its extreme positive pressure welding copper footer and battery aluminum plastic packaging film distance is very close, so manufacturers use heat resistant adhesive tape along the battery pack a circle, in order to make the battery anode and aluminum insulation plastic packaging. But this method is highly reliable. Once the anode is connected to the aluminum-plastic packaging, battery short circuit occurs when together. Improved method is to insert a piece of insulating paper in the anode copper, then re - Wrap hot tape to protect paper ( FIG. 1) 。 Note that the strength of aluminium is very low, do not bend, if a lot of bending failure, cause cells to waste, the operation should be more careful. Figure 2 for the battery, tin is essential, otherwise it is difficult to weld well in the assembly process. As a result of nickel plated copper surface is very smooth, so using rosin is not easy to dissolve in alcohol solvent tin. Solution: scrape the needs of the tin coating the surface of the coating with triangle knife blade on the ground, reveals the red ( The color of the pure copper, figure 2) And then apply a layer of flux, rosin alcohol and 20 or 30 w w iron is easy to hang ( Figure 3) 。 Iron, be careful not to use hints tips too little contact and welding surface to promote heat transfer. I use the welding head ( Figure 4) , tin not too thick, otherwise the copper is not easy to bend. After welding residual flux no corrosive, do not need to be cleared. The other two contents: 1. Do not use high-power iron welding, its high temperature, welding time long can damage the battery; 2. Do not use corrosive flux solder paste. In this way, the preparing work before assembly is completed. Figure 3 battery assembly with double-sided adhesive will stick together and neat. Note that each cell polarity. The two cells must be relative. After everything is ok, the battery pack with fiber tape wrapped up ( FIG. 5) 。 Battery space filled with light wood between the poles.