When battery manufacturers are making a prismatic lithium battery pack, busbars may seem to be just an ordinary metal strip. However, in reality, different factors such as dimensions, materials, surface conditions, bends, and geometry of connections all affect how the busbar will work during the process of assembling the battery pack.
This becomes even more crucial when busbars are going to be laser welded to the prismatic lithium battery cells.
Adinath Enterprises produces custom laser-welding aluminum busbars. The task of the company is to manufacture the precise busbar according to the required design and specifications without doing any laser welding. The finished busbars are then delivered to the customers ready to use them during the process of laser welding.
A laser-welding-ready aluminum busbar is an aluminum electrical connector made with exacting precision to be used later in battery packages where the busbar will be attached to battery cell connections using the laser-welding process.
The busbar is manufactured to specifications that match the requirements laid down by the battery manufacturer with regard to the dimensions, thickness, shape of the holes and slots, bends, and areas where connections can be made so that it integrates properly into the battery assembly.
Adinath Enterprises manufactures such busbars as per the requirements of the customer based on the customer’s drawings this includes customized sizes, thicknesses, width of the holes, the shape of the bends, and insulation, if necessary.
Why is Busbar Design Important for Battery Pack Connections?
A battery pack is comprised of countless electrical connections, and even the slightest error in one small component could create an unexpected problem when thousands of parts come into play.
The production of busbars requires careful consideration of specific parameters like the following:
Electrical resistance and conductivity
Thickness and cross-section of the busbar
Design of terminal connection
Dimensional accuracy and flatness
Condition of the surface
Burrs and sharp edges
Bends conditions and angles
Alignment with the battery
Completeness of connection technology
Continuity of the process across batches
Welders will be using various parameters like laser power, speed of welding, focus, beam width, shielding gas, and so on, but the quality of the appropriate busbar is what counts in the process.
These customized aluminum busbars come of great relevance for the companies engaged in the manufacturing of prismatic lithium batteries.
The common implementations include:
EV battery packs,
Lithium-ion battery modules,
Battery Energy Storage Systems (BESS),
Solar energy storage systems,
Industrial battery systems,
UPS and backup battery systems,
Any battery assembly solution that operates at high currents.
Adinath Enterprises is one of the companies that offer laser-welding aluminum busbars in their product lineup and offer customized busbars tailored for their integration into prismatic lithium batteries.
The whole procedure begins much earlier than when aluminum comes to the machine.
1. Analysis of the requirements and drawing
Every specialized busbar is made from the understanding of the customer’s needs.
The specialists of the engineering department analyze the following information:
Battery cell type
Dimensions
Material grade
Thickness
How connections are done
Pores and slots
Bending
Tolerance of the bus bars
Quantity and volume of production
Surface finish
This way of drawing ensures that the busbar produced is made to meet all the requirements stated by the producer, not just taking any connector that can be found.
2. Material selection
Material selection is one of the first points of influencing the busbar that is made.
In battery applications aluminum is the right choice, as it possesses all the advantages such as low weight, good conductivity, and easy forming and manufacturing capabilities.
It is worth mentioning that different types of aluminum busbars can be offered by Adinath depending on what the customer really needs.
3. Precision Cutting and Forming
After determining the material specifications and drawing requirements, the aluminum is processed so that it has the appropriate geometry for the busbar.
Depending on the design, different processes may be needed for production, such as:
Precision cutting
Punching
Drilling
Bending
Forming
Chamfering
Deburring
The idea is rather straightforward: the desired shape must be manufactured exactly the same way, from one repeat to another.
When it comes to battery manufacturers, it is important to achieve the same results because the busbar has to fit the assembly of different production batches.
4. Punching holes and slots
Holes and slots are not only aesthetic details.
They might be needed for positioning, attachments, clearance from other elements, or other needs according to certain specifications of a battery architecture.
The placement and size of holes and slots should be done strictly according to the drawing prepared and approved.
Incorrect hole position, rough burrs, or inaccurate size of slots might be problematic during the assembling process.
That is why the features will be produced in accordance with the design specified by the client rather than in accordance with a standard design.
5. Bending and Dimensional Control
Busbars in some batteries are not necessarily flat.
They could comprise of curves and areas designed to follow the battery module’s physical construction.
In case the bend is inaccurately implemented, it may affect how well the busbar fits in with the terminal or outer components.
Thus, angle, place, overall length, width, and other vital measurements need to be verified with respect to the approved plan of operations.
This is an important point.
Adinath Enterprises manufactures the busbar, while it is the customer who performs laser welding.
Adinath’s responsibility is to provide busbars manufactured in accordance with the specifications so that customers can use them during downstream production of batteries and welding.
It means that manufacturing has to focus on such parameters as the following:
Right material
Dimension accuracy
Thickness precision
Connection geometry accuracy
Bending quality
Clean cutting
Surface conditions
Consistent production quality level
Real welding parameters and validation refer to the customer’s welding process.
This separation is important, as a busbar manufacturer should not claim to include any process it cannot actually perform.
Custom-made busbars can have many really useful advantages for battery manufacturers, such as.
Geometry tailored to the specific application instead of a generic one
Weight advantages over copper alternatives
Great convenience in terms of the layout of prismatic cells
Consistent dimensions while manufacturing and assembling the busbars
Applicability in automated production technologies
Less manual adjustment after delivery
Consistent series of manufacture
Ability to manufacture according to the technical specifications of the customer
Adinath Enterprises can work with both small and big orders to implement custom-made busbars in production.
A busbar may look ideal but still have dimensional issues that jeopardize the assembling of the units. Thus, the quality control should do more than just check the appearance of the busbar.
Among the critical inspections, one can list the following.
Inspection of dimensions
Thickness control
Measurements of slots and holes
Position of bends of the busbar
Condition of the surface
Inspection of burrs and edges
Material inspection (if needed)
Final quality control
Packing control
Adinath Enterprises utilizes an ISO 9001:2015-accredited quality management system with its own manufacturing and quality inspection for its customized products.
According to ISO, ISO 9001:2015 specifies the requirements for the quality management system, which includes controlled operations, evaluation of results, and recurrent improvements.
There are several mistakes that continually occur in custom busbar projects.
Selecting Based on Price
The least expensive busbar may not be the cheapest choice in total, taking into consideration its rework, bad fit, delays in assembly, and rejected parts.
Considering Busbars as Regular Components
Yes, battery design can vary immensely, and busbars designed for one set of cells can fail to work in other configurations.
Neglecting Surface and Edge Treatment
The joint area should be well-prepared for joining, as any burrs, foreign particles, or inconsistent surface can lead to problems.
Not Submitting the Final Drawing
The manufacturer has to receive the right drawing specified so that it can produce a repeatable custom part.
Paying Attention Only to the Material
It is important to choose the right aluminum grade, but geometry, thickness, tolerances, forming, surface condition, and manufacturing consistency also matter.
When placing an order for busbars needed for an electric vehicle or lithium battery project, it is critical to ask the manufacturer the following questions:
Are you able to produce busbars according to our designs?
Are you capable of handling both prototypes and mass production?
What aluminum grades do you offer?
What are the acceptable tolerances for the dimensions we need?
What are the quality control measures for holes, slots, bends, and formed metal?
What quality checks are carried out?
Can you ensure that the production batches stay unchanged?
Do you know what is required to produce prismatic lithium battery cases?
Are you able to deliver busbars ready for further laser welding?
Are you open for discussions on engineering details before starting production?
This is a quick way to find out whether you are speaking to a real busbar manufacturer or just a trader.
Since 1994, Adinath Enterprises has been producing customized copper and aluminum bus bars from its production facilities in Delhi and Ghaziabad. The company has specialized in the field of manufacture of drawing-based busbars, which are customized, having set up both a manufacturing facility of its own as well as being ISO 9001:2015 certified.
However, battery makers do not merely get aluminum strips of the required dimensions.
Rather, they have a manufacturing partner that can take charge of understanding the designs, producing the required geometrical shapes, ensuring the measurement accuracy, and inspecting the final parts.
For the aluminum busbars that would later go through laser welding, it is important.
The customer takes care of laser welding, and Adinath takes care of manufacturing the busbars that are to be used for the laser welding process.
What is a laser-welding type aluminum busbar?
This is a special type of aluminum busbar made as per the specifications of the battery design to be compatible with the subsequent laser-welding process of the customer application, especially for connecting prismatic lithium battery cells.
Does Adinath Enterprises carry out laser welding for battery packs?
No. Adinath Enterprises is engaged in the production of aluminum busbars that are compatible with customer laser welding. Welding and final battery pack assembly are done by customers and their relevant partners.
Why use aluminum busbars for battery packs?
Aluminum offers very low weight, good conductivity, excellent formability, and cost-effective characteristics. Hence, it is suitable for battery interconnections.
Can Adinath Enterprises make busbars according to the customer-specific specifications?
Yes. Adinath mentions that it offers customized busbars manufactured according to the specifications and requirements of the respective customer, including size, shape, thickness, hole pattern, bending, and finishing.
Are aluminum busbars good for laser welding?
Indeed, the suitable designs of aluminum busbars are widely found in laser welding battery applications. However, it is important to note that the actual welding process highly depends on the machinery, materials, joint design, and optimized parameters that the client provides.
In what kind of batteries can aluminum busbars be used?
Aluminum busbars can be used in electric vehicle battery packs, prismatic lithium battery modules, energy storage systems, solar energy systems, UPS, and industrial batteries.
What information do I need to present when I order a custom busbar?
It would be better to provide the updated engineering drawing, aluminum grade and thickness, sizes, bending details, hole/slot positions, quantity, tolerances, surface details, or assembly information.
Achieving a dependable power connection does not happen with only the help of the welding machine. This process actually begins long before then due to the design, materials used, size, shape, surface quality, and uniformity of the supplied busbar.
This is why a specialized manufacturer can be beneficial in this case.
Adinath Enterprises is known for its production of custom-made aluminum busbars for various applications of lithium batteries. The manufacturing of the busbar is carried out according to specific needs and drawings of the customer. Adinath Enterprises delivers the busbars for the further welding operation needed by the manufacturer.
If you are working on the project of the electric vehicle battery, energy storage system, or prismatic lithium battery and require a custom-made aluminum busbar, it is advisable to consult with a professional busbar manufacturer before starting the production.
Looking for custom-made aluminum busbars? Contact Us to discuss your project with the professionals.
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