Brief analysis of lithium battery welding process

Lithium battery welding process description Lithium battery welding process description 1. Ultrasonic metal spot welding of lithium battery Because the positive electrode of lithium battery is aluminum tape, it cannot be directly welded with tin, so nickel tape should be added. Ultrasonic metal spot welding is usually used: high-frequency oscillation occurs by using ultrasonic waves to cause high temperature in the local friction between two metal sheets, and then the two metal sheets are fused and connected. Frequency: 20K~35KHZ Time: about 0.3/S Pay attention to selecting suitable metal ultrasonic welding machine welding equipment. Use appropriate welding parameters. Prevent the front side welding of the aluminum strip, otherwise it is easy to break. Prevent the positive electrode aluminum bar from being welded firmly, otherwise the battery will be easily cut off; 2. The important principle of the soldering connection of the lithium battery: Use the heat of the soldering iron to melt the solder wire to make the solder adhere to the soldering part, and then connect after cooling. 1) Classification of soldering irons: internal heating and external heating, the internal heating iron heats quickly. Ordinary soldering iron, thermostat soldering iron, antistatic thermostat soldering iron. 2) Soldering iron power: 30W, 35W, 40W, 50W, 55W, 60W, 65W, etc. 3) Soldering iron temperature: According to the soldering area of u200bu200bthe soldering iron and the amount of tin, if the temperature is too low, the tin wire will melt too fast, which will affect the soldering speed. If the temperature is too high, the solder joints will not be smooth. The soldering iron temperature is generally set at 360℃±10℃ 4) Soldering posture: relaxed and natural, sitting upright. 5) Welding process: pen clip, straight clip. 6) Soldering angle: The soldering angle of the clamp pen is between 30 and 60, and the best angle between the tip of the soldering iron and the object to be soldered is 45. 7) Solder composition: tin (Sn) 60 to 63%, lead (Pb) 40 ~37%, rosin 1.0%~1.2%. Some existing companies have started to use lead-free solder. 8) Soldering time: u003c3S9) Method: Put the soldering iron into the soldering part first, and then put the tin wire between the soldering iron tip and the soldering part In the gap between. 10) Welding quality: solder joints are bright and uniform, firm, tin-free, missing soldering, no false soldering, no porosity, and no plating. The size of the solder joint is related to the amount of hot tin in contact. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Charge and discharge voltage requirements for lithium iron phosphate batteries