L822 battery.Lithium iron phosphate battery assembly method and production process

　　Lithium iron phosphate battery assembly method and production process. The lithium iron phosphate battery assembly production process is divided into three major sections, one is pole piece production, the other is cell production, and the third is battery assembly. In the lithium iron phosphate battery assembly production process, pole piece production is the foundation and battery cell production is the core. Battery assembly is related to the quality of the finished lithium battery.

　　Lithium iron phosphate battery assembly method

　　1. Select the appropriate battery cell. The battery cell type, voltage, and internal resistance need to match. Please balance the battery cells before assembly. Cut the electrodes and punch holes.

　　2. Calculate the distance according to the holes and cut the insulation board.

　　3. Install the screws. Please use flange nuts to prevent the nuts from falling off. Install the screws and connect them to fix the lithium iron phosphate battery pack.

　　4. Connect and solder the wires. When connecting the voltage collection line (balance line), do not connect an external protection board to avoid accidental burnout of the protection board.

　　5. Fix the insulating silicone again. This silicone will solidify over time.

　　6. Install the protective board. If you forgot to balance the cells before, this is the last chance before assembling the lithium battery. You can balance it through the balancing line.

　　7. Use an insulating plate to fix the entire lithium iron phosphate battery pack, and seal it with nylon tape. Nylon tape is more durable. Please note that we have never used steel casings. Although steel casings are beautiful and strong, the battery cells are very tightly integrated. It is difficult to guarantee. If some shells are not properly treated, they may scratch the battery core and cause leakage, or even cause accidents due to poor insulation.

　　8. After encapsulating the battery core as a whole, be sure to secure the battery core and protective plate. Our battery core is still guaranteed to work normally if it is dropped from a height of 1 meter.

　　9. The final packaging is completed, and silicone wires are used for input and output. As a whole, it is a 48V20AH lithium battery pack with iron lithium cells. The battery pack weighs 9 kilograms, which is half the weight of the same acid battery.

　　10. After the tutorial is completed, we have tested the lithium iron phosphate battery pack and it can meet our requirements.

　　What are the process steps of lithium iron phosphate battery assembly technology?

　　1. Battery material handling

　　Some materials used in secondary batteries, such as lithium ion, require special handling. Electrodes should be handled at high speed without damaging the fragile active material. In electrolytes, special considerations need to be taken to prevent the formation of precipitation and corrosive gases.

　　2.Cam unit

　　If a machine is constructed using cylinders or AC servo actuators with a cycle time of less than 1 second, it will be difficult to synchronize or maintain a stable state for a long time, even if it is in good condition when installing a new machine. Then, the cylinder reaches the end of its running distance in a short period of time, so its maintenance cycle is short. In machine-constructed cam mechanisms, such problems can be solved because all drive is maintained by a minimal electric motor.

　　3. Installation and base

　　Establishing a strong installation and foundation for your machinery is important for long-term stability. The mounting and base reduce start-up time by minimizing accuracy deviations in the transmission and transmission mechanism. Often, the use of aluminum frames is eliminated. Build a stable base using thick square logs and a substantial base of can-making craftsmanship. For various requirements, it is possible to anneal and use mounts with extra precision.

　　4. Vacuum treatment

　　There are not only simple vacuum chambers and furnaces, but also mechanisms for operating vacuum chambers and liquid application equipment. Requires extensive knowledge of special vacuum equipment and parts such as vacuum pumps, pipes and valves.

　　5. Precise positioning

　　You must have appropriate positioning technology and experience to implement an efficient processing calibration system according to mechanical positioning and image processing needs. In order to maintain accuracy over the long term, it is necessary to achieve control of the camera or positioning stage, as well as precise positioning, including installation design.

　　6.Laser welding

　　If possible, knowledge and results of various lasers such as CO2, YAG, LED, fiber, etc., such as laser welding of lithium iron phosphate battery thin foil, welding of throttle housings and covers, resin welding instead of metal, etc. . Recommend the most suitable welding method based on specifications and selection of welding machine.

　　7. Press

　　Requires technology and experience in handling various presses, such as air, hydraulic and servo. We have a wide range of results, from test production level robotic arm presses to machine platforms that produce products with high precision and quality control of speed and torque with servo motors.

　　8. Dimensions measurement

　　Dimensional measurement using various methods using laser displacement meters, image processing equipment, contact and non-contact sensors, etc. In production machines, correct dimensions cannot be measured with measuring equipment alone. Therefore, accuracy must be maintained across the board, including installation vibration, etc.

　　Before assembling the lithium iron phosphate battery pack, it is necessary to first calculate the product size and required load capacity of the lithium battery pack, and then calculate the capacity of the lithium battery pack to be assembled based on the required capacity of the product, and then Choose lithium batteries based on the calculation results.

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