Lithium Battery Spot Welding Machine Price? Types of Battery Pack Welding Machines Available on the Market

Many customers are surprised—when they search for a lithium battery spot welding machine online, they often find prices vary significantly between models. Some machines cost as low as hundreds of dollars while others run into thousands, and a few even tens of thousands of dollars! Why is there such a big price difference in lithium battery spot welders??
The answer lies in the welding power supply. Different technologies for welding power supplies are the key to welding performance, stability, efficiency and likely, the price of the machine. So, let’s take a closer look at the different types of welding power supplies, how they affect the price of a lithium battery spot welding machine, and whether they can suit your welding needs.
Lithium battery spot welding machines fall into four categories:
AC spot welding machine
Capacitor discharge (energy storage) spot welding machine
High frequency DC spot welding machine
Transistor spot welding machine                                                                                                                                                                                        In fact, apart from the power supply, the overall structure of lithium battery spot welding machines are very similar.The biggest difference between them is the welding power supply they use.
So among the four types of spot welding machines, which one is the most suitable machine type for welding battery terminals and nickel strips in lithium battery pack assembly?
Of course, the first choice is the transistor spot welding machine. Why? Let’s take a look at the performance characteristics of several kinds of welding power supply.
①AC welding power supply: AC welding power supply with slower rise rate of current; Between first pulse and second pulse, there is a long interval; After the first pulse is finished, at a certain time only the second pulse comes, so the energy utilization rate is poor. But it is widely used because it has a simple structure, and is easy to maintain and durable and the cost is low. The welding time is long, and the versatility is strong. This power supply is mostly used for welding “easy to weld” materials such as iron. ②Capacitor energy storage welding power supply: The power supply of this kind of welding machine use the energy stored in the capacitor, and then discharge to weld the workpiece.As shown in its operating principle, the current rise rate is relatively rapid, which will produce larger spatter and sparks, and the energy duration is relatively short. Because of the charging and discharging circuit, the energy loss is higher. Generally used for materials such as aluminum and copper that are easier to weld and have good thermal conductivity. Since the capacitor can store energy, even if the factory power supply capacity is relatively small, it can still be used.
③ High-frequency welding power supply The welding method uses AC power supply to be rectified and converted into variable frequency output, which is used for welding. Because of the high frequency, the thermal efficiency is high, and because there is a current and voltage feedback function, that is, the feedback from the position of the welded joint, it can make the welding next time more stable and high quality. It is used for precision welding, and also realizes fast continuous welding. The welding transformer is miniaturized and light.
④ Transistor welding power supply. This power supply directly uses highpower transistorfor controlling the output of the welding current. Just like high-frequency welding power supplies, it also achieves feedback control of current, voltage and waveform. Depending on switching the whole circuit to realize a closed loop control system. Feedback is feeded back to the input side, or signal is passed to the input and the input parameter is obtained by the feedback to eliminate control error, i.e. correct it for improving accuracy. It has the highest thermal efficiency of the above four power supply, achieves very stable welding quality, and is very suitable for precision welding. It can achieve precise control of welding time in units of 0.01 ms. Realize shorttime highcurrent output. It should be lower with respect to the power supply of input power. To sum up, it can be seen that the better welding power supply is the transistor power supply. The sooner the power supply of the AC welding power supply must use simpler structure, the price is correspondingly much cheaper. You must know that the price of a spot welding machine is not only depend on the welding power supply. Of course, only the main factor. And there is no good other key components, such as the welding head, whether precision welding machine head or not will also become relevant. Of course, it will directly affect whether it can press the workpiece to realize interruption of time.