8 steps to know how a smart BMS is made
SMT, the full name Surface Mounted Technology, is the most popular surface mount technology and process in the electronic assembly industry. Tritek as a professional LEV manufacturer, already wildly applied SMT technology into production. We added 4 new SMT automation production lines in May 2021. It not only improves product production efficiency, but also produces a wider variety of smart BMS (Battery management system) products, such as E-Bike 36V/48V battery packs, and electric motorcycle 48V/60V/ 72V battery packs.
Smart BMS
BMS assembly enables you to control the battery’s voltage level, current, and temperature. It helps to keep the battery safe by preventing it from overheating, overcharging, or over-discharging. It also gives you the ability to check the amount of energy remaining in the battery.
Discover more about BMS protection features.
For purpose of SMT production efficiency and intelligence, Tritek launched the “IMS Digital Intelligent Manufacturing System” in April 2021. IMS stands for Intelligent Manufacturing System, an upgraded version of the Manufacturing Execution System! It will help us build automated production lines to produce smarter, safer, and better-quality batteries.
With automated SMT production lines and IMS, Tritek confidently produces excellent BMS & smart BMS products. So where our confidence comes from? I would like to explain them one by one:
Of course, before the production needs to do some preparatory work, PMC production planning instruction – project release BOM list – steel mesh production – material inspection – chip type PCB baking.
Having completed the above preparations, now without further ado, let’s get started.
Step 1, PCB upper plate:
Put the PCB material online according to SOP.
Step 2, printing solder paste：
We need to print with steel mesh and solder paste. The storage and use of the environment of solder paste determine the quality of printing. Note that the storage of solder paste should be controlled under an environment of 0-10℃; The service life of the solder paste is 6 months (open) and can not be directly placed in the sun.
Before opening, the solder paste temperature must be rose back to the ambient temperature (25±2℃), and the temperature return time is about 3-4 hours. It is not allowed to persistent overheating. After the temperature return, the paste can be used after mixing evenly.
To ensure printing quality, two sides of the steel mesh need to be cleaned every 4 hours.
Step 3, online SPI:
It is called online solder paste inspection, 2D (or 3D) measurement of solder paste after PCB printing using optical measurement technology, which can achieve the effect of micron precision.
Objective: To find unqualified solder paste printing products before welding, avoid PCB NG, and achieve qualified quality.
Step 4, electronic component attach:
Component mounts for electronic components. After checking actual materials according to the BOM list, start patch production.
Step 5, AOI test:
Automate Optical Inspection test, a device to detect common defects in welding production based on the principle of optics and check the quality of component patch products.
Step 6, reflux furnace welding:
Principle: there is a heating circuit, and the furnace is heated to a proper temperature to blow to the attached components of the PCB board, to achieve the purpose of welding. The advantages of the process are that the temperature is easily controlled, oxidation is avoided during the welding process, and manufacturing costs are more easily controlled.
Step 7, AOI test:
Automated Optical Inspection test, the optical principle checks the quality of the welding. (Perform repair to the PCB board that has detected a malfunction. The tools used are a soldering iron, repairing workstation, etc. Configuration position in the production line, then AOI test it again.）
Step 8, PCB to remove:
Remove the PBCA products that have passed the test after the electronic components have been mounted. After the first piece confirmation, appearance inspection, BGA inspection, and QA inspection, the packaging will be put into storage.
Tritek’s 4 SMT production lines have a daily capacity of 9 million points. 100% AOI test, SPI test for high tin thickness, X-Ray test for BGA products ensure BMS quality, and 100,000-grade dust-free workshop.
Tritek provides customized BMS products and offers a wide range of battery protection solutions: overcharge, over-discharge, overheat, short circuits, etc. Furthermore, it monitors and reacts to SOH, SOC, and DOD with the assistance of balancing status. Besides, our smart BMS can communicate with customized protocols, such as CAN, RS485, UART, etc. You can imagine that it is a mobile phone App, which is designed software following up your mind!
In a word, PCBA is one of the most important parts of all electronic applications, including lev batteries. Tritek makes every endeavor to produce the best PCBA and lev batteries at a high-quality level.
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