SIASUN New Energy Vehicle Trunk Battery Pack Tightening (GCR20)

A car boot is about the least welcoming workplace a production engineer could choose for a fastening operation: the opening is narrow, the battery pack sits low and deep, and the body keeps moving down the line while the bolts wait to be tightened. SIASUN New Energy Vehicle Trunk Battery Pack Tightening (GCR20) is SIASUN's answer to that awkward combination. Rather than building a bulky fixed station around the vehicle, the solution places a vision-guided SIASUN DUCO GCR20 collaborative robot beside the line and lets it tighten the trunk battery pack while the car continues on its way.

Robots Europa, based in Dublin, supplies this SIASUN application to manufacturers across the European Union and the DACH region. Robots Europa prepares the quotation, coordinates delivery to your plant and remains your point of contact for technical questions and after-sales support, so that one partner handles the project from the first enquiry to commissioning.

Background

SIASUN and the DUCO collaborative robot family

SIASUN is a Chinese robotics manufacturer whose portfolio spans industrial robots, mobile robots and automation solutions for sectors such as automotive and electronics production. Its DUCO range covers collaborative robots, designed to share a workspace with people rather than operate behind guarding. The GCR20 is a member of this family, and in this application SIASUN has configured it with a vision system specifically for tightening work on new energy vehicles. You can explore the wider range in the SIASUN category.

A comprehensive analysis of the task was carried out before the robot was selected. The GCR20 was chosen for three advantages: a large load, high flexibility and light weight. With those qualities and a vision system added, the robot was turned into a tightening expert, taking over trunk battery pack tightening on the fly with the line.

Robot plus vision: secondary positioning at the tightening point

The central technology in this solution is the pairing of the robot with machine vision. The combination enables secondary positioning of the battery pack tightening point: once the robot has brought its tool into the working area, the vision system refines the position of the actual fastening location. This improves both tightening speed and yield, which matters on a line where every vehicle body arrives with its own small variation in position.

Equally important is the safety concept. The active-passive safety system of the DUCO collaborative robot allows it to work in tandem with people. The installation occupies a small location, protects site staff and removes the need for safety fencing, which simplifies integration into an existing assembly line where floor space beside the vehicle is limited.

Technical Specifications

Specifications as published by the manufacturer; confirmed against the datasheet at quotation.

SIASUN has not published the dimensions, weight, reach, repeatability, power supply, tightening torque, IP rating, communication interfaces, software or the scope of delivery for this solution; Robots Europa confirms these details with the quotation.

Why does trunk battery pack tightening need a collaborative robot?

The core challenge is simple to state: the space for working in the trunk of the car is very small. That single fact shapes every other design decision. A robot working inside a confined opening needs freedom of movement to approach fastening points from the right angle, so the flexibility of the arm becomes essential. At the same time, the tool at the end of the arm has to be compact, because a large nutrunner simply would not reach every bolt.

Conventional fixed automation struggles with this kind of geometry, and a traditional industrial robot typically requires a guarded cell that takes up floor space the line may not have. The DUCO GCR20 addresses both points. Its flexibility helps it work within the constrained trunk, its light weight suits installation close to the vehicle, and its active-passive safety system means it can operate next to line staff without fencing. The result is a tightening station that fits into the line rather than forcing the line to be redesigned around it.

Load capacity is the other side of the equation. Tightening a battery pack calls for high torque, and the reaction forces and tool mass have to be carried by the robot. With a load of 20 kg, the GCR20 offers the ability to tighten with high torque and guarantees tightening quality. The specific torque values depend on the tightening tool, which is why they form part of the quotation discussion.

How does vision help when tightening on a moving line?

Tightening on the fly means the robot does not wait for the vehicle to stop. Each body moves along the line with slight differences in position, and the battery pack inside the trunk adds its own tolerances. Relying on taught positions alone would risk missed fastening points or cross-threaded bolts. The vision system closes that gap through secondary positioning: it locates the tightening point precisely before the tool engages, so the robot adapts to the vehicle in front of it rather than assuming a perfect position.

This approach brings two benefits: higher tightening speed and better yield. Faster cycles help the station keep pace with the line, while improved yield means fewer fastenings that need rework further downstream. For manufacturers scaling up new energy vehicle production, that pairing of pace and first-time quality is often the deciding argument for automating a station that was previously manual.

Who is SIASUN New Energy Vehicle Trunk Battery Pack Tightening (GCR20) for?

The primary audience is manufacturers of electric and other new energy vehicles whose design places a battery pack in the trunk area and whose assembly lines tighten that pack while the body is in motion. Production and industrial engineers responsible for final assembly will recognise the problem the solution addresses: a cramped, ergonomically demanding manual task that must be completed at line speed and to a consistent quality.

System integrators building tightening stations for automotive customers form a second group. The fence-free collaborative concept and small footprint make the solution easier to place on lines where floor space is already allocated. Plants that want to automate one difficult station without rebuilding the surrounding layout are a third group, as are automotive suppliers assembling battery-related modules under similar space constraints.

The sources describe a single version, the GCR20, so there is no alternative trim to steer towards within this application. Buyers whose needs lie in intralogistics or electronics assembly rather than vehicle tightening will find other solutions in the SIASUN range, and Robots Europa can advise on which fits the project.

What is SIASUN New Energy Vehicle Trunk Battery Pack Tightening (GCR20) used for?

1. Trunk battery pack fastening: tightening the bolts that secure the battery pack in the trunk of a new energy vehicle.
2. On-the-fly tightening: completing fastening operations while the vehicle body continues to move along the line.
3. Vision-guided positioning: refining each tightening point with secondary positioning to compensate for variation between vehicles.
4. High-torque fastening: carrying a tightening tool within the robot's load capacity to fasten with high torque.
5. Collaborative line stations: working alongside line staff without safety fencing thanks to the active-passive safety system.
6. Confined-space automation: automating a task in a tight working space that is difficult for fixed automation and tiring for operators.

Pricing and Availability

Every tightening station depends on the vehicle, the fastening specification and the layout of the line, so Robots Europa prepares an individual quotation rather than publishing a standard price. Delivery, customs and support are arranged with the quotation. To begin, send us a short description of your vehicle, battery pack and line speed; the quotation request form is available on this page.

Frequently Asked Questions

Which robot does this solution use?

It uses the SIASUN DUCO GCR20 collaborative robot equipped with a vision system, configured for trunk battery pack tightening on the fly with the line.

What load can the GCR20 carry?

The GCR20 has a load of 20 kg, which gives it the ability to tighten with high torque and guarantees tightening quality.

Does the station need safety fencing?

No. The active-passive safety system of the DUCO collaborative robot allows it to work in tandem with people, occupying a small location and providing safety for site staff without safety fencing. A risk assessment for your specific installation remains part of the project.

What does the vision system do?

It provides secondary positioning of the battery pack tightening point, which improves tightening speed and yield.

Why is the end tightening tool compact?

The working space in the trunk of the car is very small, so the tightening tool at the end of the robot has to be compact enough to reach the fastening points.

What is the tightening torque and reach?

Robots Europa confirms the tightening torque, reach and repeatability for your application against the datasheet as part of the quotation.

Where can I buy SIASUN New Energy Vehicle Trunk Battery Pack Tightening (GCR20) and what does it cost?

Robots Europa supplies this solution across the EU and the DACH region. The cost depends on your line and tooling requirements, so it is set out in an individual quotation that you can request on this page.

Summary

The trunk of a new energy vehicle is a cramped, moving target, and SIASUN New Energy Vehicle Trunk Battery Pack Tightening (GCR20) is built around that reality. A flexible, lightweight DUCO GCR20 with a 20 kg load carries a compact tightening tool into the confined space, vision-based secondary positioning finds each tightening point as the vehicle travels, and an active-passive safety system lets the station operate beside line staff without fencing. Torque, interfaces and the remaining details are settled with Robots Europa during quotation. For a manufacturer looking to automate this demanding station on a moving line, this page is the starting point.