I recently saw the actual Jaguar module discussed by AVL. This way of relying entirely on viscose combination also has certain limitations. Therefore, the mode of partial viscose and partial afterburner may be the development direction of soft package modules in the future.
1) All methods rely on glue
Indeed, in the new module design, the battery cell module bracket and heat sink are eliminated, and a new heat dissipation method is designed, so that the 4 cells become a group, and then divided into a unit through the foam in the middle. Adopt glue to connect to form a whole.
This improvement, the main changes, are compared as shown in the figure below:
Each module reduces the weight by 150g
Each cell reduces the thickness space of 0.4mm
The cost of the bracket is reduced
In this design, the adhesive glue and the foamed structure filling glue occupy a very important position. The internal parts of the module need to be integrated to prevent the relative movement of the cells. The insulation measures taken here will be somewhat different. The specific module technology and parallel parts may be different in the use of foam and insulating materials due to the actual separation treatment. In addition, the processing and fixing of the tabs of the lower battery cell require foamed material glue for processing, similar to the method of partial glue drop.
2) Combining in block mode
Hyundai proposed the structure in its compatible BEV/PHEV
The structure of this battery system is divided into three layers, composed of small modules, large modules and systems. The system structure of small modules provides sufficient surface pressure for each soft-packed cell and maintains precise detection between small battery modules. , To prevent the deformation and stress transmission throughout the life cycle. This includes 4*4*3, a half pack consisting of a total of 48 batteries.
Four soft-pack batteries are installed in the small module, including
4 soft pack batteries
Foam to maintain internal pressure between batteries
Aluminum cooling plate for indirect cooling of pouch batteries
All components are stacked in order and assembled into a sub-module, and the four batteries are assembled into a complete module with long bolts. At this time, the initial surface pressure of the cell is designed by calculating the compression of the foam
When batteries of different thicknesses exist in the Pack, the side plates of the battery module and the battery injection box housing the batteries are uniform parts, and the foams of different thicknesses are mainly adjusted. In the actual mechanical simulation process, the side panel of the module and the side panel of the whole half package are more important check points. This involves structural parts such as end plates, aluminum side plates, and support plates.
Summary: These two basic structural designs are probably the main design forms for the short-term mass production of the lugs on both sides, and the latter has more continuous space in the future.
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