The production process of energy storage battery system is divided into two segments: battery module production and system assembly.

In the battery module production and manufacturing section:best lithium ion battery machine company the inspection of a qualified cell through the lug cutting, core insertion, lug shaping, laser welding, module encapsulation and other processes assembled into a battery system module;

In the system assembly section: a qualified battery module is assembled into a finished system with BMS circuit boards, and then enters the finished product packaging section after primary testing,equipment for lithium battery assembly high-temperature aging and secondary testing.

According to the description of the relevant company, the production process flow chart of the module is as follows.

1. Core stacking: This process is the first step in preparing the module. Finished cores and side plates, end plates, cover plates, connectors and other components that have passed inspection are paired online, and then the cores are stacked in series and parallel in a certain order.

Care should be taken to avoid glue overflow when stacking. When stacking, both sides of the module need to be aligned, both sides need to have alignment mechanism, lateral plane tolerance ≤ 0.5 mm, and the contact between the stacking fixture and the core shall not cause damage to the core.

On the core a stacking reference plane can be provided according to Party B technical level and core size requirements tolerance management range (the current core height design drawing tolerance 0.5 mm), Busbar (hard) selection, but need to ensure that the polar column surface of the different levels of tolerance ≤ 0.3 mm, and at the same time, we can not appear due to the Z-direction height difference can be caused by factors of change in the quality of the weld defects.

In the process of module stacking, components and cells have a positioning mechanism, in the middle of the stack, every stack of a component for a shaping compression (length, width) , the whole process to prevent the cell short circuit. Do not damage the appearance of the cells and components, do not damage the insulating blue film of the cells.

Before and after stacking, it should be able to judge the polarity of the electric cell in line with the module series-parallel connection law. When there is an abnormality in the judgment, it should be able to alarm.

2. Sub-module core lug welding: This procedure is the second process of preparing modules. Using laser technology to weld the stacked sub-modules to the reflow bar, welding the positive lugs and busbar, negative lugs and reflow bar respectively, which requires different process parameters.

3. Sub-module into housing: This process is the third process of preparing the module. The robot automatically places the submodule into the shell to form the module.

4. Inter-submodule lug connection: This process is the fourth process to prepare the obtained module. Through the use of laser technology will be positive lugs and negative lugs in accordance with the technical requirements of our respective welding in the system reflux row, between the sub-module lugs in series a connection.

5. Sampling line connection: This program is the fifth step in the preparation of the module. According to the technical requirements of laser technology, the sampling end of the sampling plate is welded on the reflux bar.

6. Module assembly: This procedure is the sixth step in the preparation of the module. The end plate and side plate are automatically assembled to the module by robot, and the welding is completed according to the technical requirements through laser technology.

7. Module testing: The finished module is tested for its performance, and then the qualified finished module is loaded into the warehouse.

The module production process is mainly the sub-module production process and the process of assembling modules from sub-modules, with no by-product output.