To the naked eye, a busbar may seem an uncomplicated metal part; however, its dimensions and geometry have a significant impact on how well the electrical system is assembled. In the case of EV battery packs, ESS installations, electric panels, and power distribution systems, often busbars must comply with certain fixed terminals and a specific layout of enclosure, connection, and mountings.
This is why the drawing-based manufacturing of busbars is a good solution. Instead of applying the general busbar, here the manufacturer creates the busbar adjustable to customer dimensions and requirements.
The Importance of Drawing-Based Busbar Production
A technical drawing acts as a guide for production of the busbar. It specifies:
- Length, width, and thickness of the material used.
- Diameter of the holes and distance from hole to hole.
- Slots, cut-outs, and mounting options.
- Bend positioning and angles.
- Further equipment needed for finishing and plating.
- Electrical insulation required.
- Correct tolerances needed.
This becomes even more critical when the busbar needs to be placed in between closely spaced battery elements, terminal connections, connectors, and panel elements.
For example, if the busbar has the right electrical specifications, an error in the placement of the hole can cause failure in the assembly of the busbar.
The custom busbar manufacturing process by Adinath Enterprises.
Adinath Enterprises manufactures customized copper and aluminum busbars based on customer drawings. Manufacturing starts with understanding the design instead of using standard profiles.
1. Requirement and Drawing Review
The first step is reviewing the customer's drawing.
In this review, we will assess:
- Material and thickness.
- Critical dimensions.
- Holes and slot positions.
- Bends and formed sections.
- Surface details.
- Fitment requirements based on application.
If something in the design is unclear, it can be fixed before the manufacturing starts. This helps to avoid unnecessary dimension problems.
2. Selection of Material
Busbars are generally made of copper and aluminum, but material choice depends upon application.
Material selection is influenced by criteria like electrical conductivity, its weight, mechanical specifications, method of connection, and the design of the system.
For batteries, aluminum busbars are preferred in designs that demand light-weight conductors. Adinath produces aluminum busbars that are compatible with laser welding for battery producers.
Although laser welding takes place at the battery manufacturing end, Adinath focuses on producing aluminum busbars specifically for this application.
3. Cutting, Punching, and Shaping
After establishing the design and material requirements, the busbar is manufactured based on the required specifications.
Typically, the operations that are performed for producing busbars include:
- Precision cutting
- Punching
- Drilling
- Bending
- Shaping
- Tapping
- Chamfering
- Deburring
The exact sequence of operations depends on the design of the busbar. For instance, flat copper busbars in electrical control panels require different methods of production from shaped aluminum busbars used in prismatic batteries.
Manufacturing Busbars for ESS and EV Applications
Battery packs for EVs and energy storage systems have a lot of closely arranged components. That's why busbars perform both electrical and mechanical functions.
For instance, a prismatic lithium battery has a busbar that is provided with exactly the required terminal geometry and terminal spacing. Any slight shift in the holes or bends can change the position of the busbar on the battery cells.
In energy storage systems and electric power equipment, busbars can be designed with regard to the mounts, terminals, insulation gear, and housing dimensions.
Custom busbars based on drawings should be a more practical solution compared to ordering a standardized one.
Measuring Dimensions Is Essential in Designing the Busbar
A busbar manufacturing process may not be complete even though the metal has been shaped. The final product may be compared with the pertinent drawings.
The dimensional checks could comprise measuring:
- Length and width
- Thickness
- Diameter of the hole
- Distance between holes
- Pipe bend
- Angle of bend
- Positioning the entire manufacturing tool
Providing the exact drawings from the start is vital for the procurement department.
Avoidable Mistakes
There are a few unmanageable problems that can easily be avoided:
- Using an old drawing
- Failing to define the requirements
- Choosing raw materials without taking the purpose into account
- Ignoring bend allowance and fabricating the geometry
- Identifying the electrical dimensions and forgetting about the mechanical fit
- Updating the project plans after the production has begun.
Final Thoughts
The use of drawing-based manufacturing affords engineers improved control over the current and voltage characteristics of a busbar. When it comes to EV batteries, ESS devices, electrical panels, and power distribution systems, one has to choose the suitable busbar for the particular application rather than to follow the common size standards.
The company Adinath Enterprises specializes in manufacturing custom copper and aluminum busbars based on provided drawings, choosing the necessary manufacturing methods according to the required form and purpose. Thus, the busbars produced meet all system requirements from the very beginning.