Introduction"Full-stack self-development" and "purchased assembly" are the two most frequently mentioned yet least clearly explained terms in the battery swap cabinet industry. The difference is not in the marketing language, but inWhich links are controlled by the manufacturer itself—and who can step in when equipment has problems and needs changes.

What is the difference between full-stack in-house development and purchased assembly for battery swap cabinets? First, let's clarify the two terms.

Full-Stack In-House DevelopmentThe cabinet structure, compartment control logic, communication module, charging system, and backend platform are all designed and produced by the manufacturer itself. Purchased and AssembledModules are purchased from different suppliers and then assembled into a complete machine.

Both are built as battery swap cabinets, and the differences may not be visible from the appearance or spec sheet. The real difference lies inControlWhich steps are ones you can decide yourself, and which ones require waiting for others.

Below is a point-by-point comparison across five aspects that operators can perceive.

1. Communication Module: In-House Secondary Development vs Generic Add-On

In-House Development ApproachThe 4G module is independently secondary-developed by the manufacturer, using the TCP/IP communication protocol, with high data reliability; the platform can view offline counts in real time. Daochong's communication solution, based on secondary development of CAT1, keeps the offline rate below 0.3%, maintaining connection even in signal dead zones.

Common PracticesA generic 4G module is used, connected externally, and does not participate in the device's network communication processing; the offline rate cannot be guaranteed.

Impact on OperationsBattery swap cabinets fear packet loss most—unstable data transmission can cause failure to open compartments or opening multiple compartments, leaving users waiting in vain in front of the cabinet.

2. Compartment Control Board: Single-Compartment Single-Control vs One-to-Many

In-House Development ApproachSingle-compartment single-control: each compartment is equipped with an independent MCU, processing does not depend on third parties, and power retrieval is fast.

Common PracticesOne compartment control board drives multiple compartments; if a single board fails, multiple compartments become unavailable at the same time.

Impact on OperationsThis determines whether the impact of a failure is one compartment or a row of compartments.

3. Charger: Potting + PFC vs No Potting, No PFC

In-House Development ApproachPotting process is used, with PFC power factor correction, improving mains utilization during AC-to-DC conversion; mains conversion efficiency ≥92%, saving 3-5% electricity compared with ordinary solutions; potting also aids heat dissipation and dust protection, extending charger lifespan.

Common PracticesNo potting, no PFC.

Impact on OperationsThe charger is a component that runs all day; differences in efficiency and lifespan accumulate over time.

4. Cabinet Body and Door: Structural Reinforcement vs Basic Structure

In-House Development Approach：

  • The upper and lower compartments of a single compartment use a "bow" shape design, with three layers of reinforcement connected to the "bow," resistant to deformation, with a load capacity of 50 kg
  • Aluminum alloy guide rails, long service life
  • Anti-collision posts inside the compartment prevent repeated collisions between batteries and the cabinet body
  • The compartment door features six designs: heat insulation in summer and warmth retention in winter, grounding connection wire to prevent electric leakage, spring-assisted opening up to 90°, hinges fixed with robotic spot welding plus screws, light guide posts for easy checking of battery status, and anti-collision foot pads to prevent impact when closing

Common PracticesThe guide rails and compartment opening lack reinforcement and are prone to deformation and jamming after long-term use; the compartment door and cabinet structure are relatively simple.

Impact on OperationsDeformation of the compartment opening directly causes the compartment door to fail to open or the compartment to jam—this is the most common structural failure in high-frequency outdoor use.

5. Safety Devices: Multiple Protections vs Basic Configuration

In-House Development Approach：

  • 12g aerosol automatic fire extinguishing device, equipped with smoke detection alarm system
  • Water immersion detection device automatically trips and cuts power when water ingress is detected
  • Lightning and leakage protection—fourfold configuration of air switch, leakage protector, lightning protection, and electricity meter

Common PracticesAerosol capacity is on the small side; some solutions lack independent water-immersion power-off protection as well as leakage protection and lightning protection configurations.

Impact on OperationsSuch differences are usually invisible, only becoming apparent during extreme weather or electrical anomalies.

6. Where These Differences Ultimately Land

  1. Downtime ScopeWith a one-to-many solution, a single electrical anomaly may make multiple compartments unavailable at once; single-compartment single-control affects only one compartment.
  1. Room for ModificationUnder the self-developed route, if the cabinet structure needs changes or charging parameters need adjustment, the manufacturer can move production scheduling; the assembly route requires waiting for upstream suppliers to cooperate.
  1. Iteration speedHardware and software come from the same source; upgrades on the cabinet side and platform side can advance in sync, without waiting for two suppliers to align their pace.

The self-developed route also leaves traces you can see directly—Intellectual property registrations for both hardware and software. Dochion has accumulated 8 patents, 27 software copyrights, and 12 registered trademarks, with registrations covering battery swap cabinet structures, lithium battery charging control systems, GPS trackers, as well as multiple software systems for operations management, battery rental and swapping, and battery monitoring—both sides match up.

7. Back to the Choice Itself

Purchased and assembled does not mean unusable. For situations with limited budgets, simple sites, and no short-term plans for changes, an assembled solution can also run.

What really needs to be avoided isNot knowing which type you boughtIf you mistake an assembly solution for full-stack self-development, then when the equipment needs changes, expansion, or deeper feature integration, you discover that every point requires waiting for others. So rather than "who is self-developed," a more practical question is—When this cabinet needs work later, who do I call?

To learn more about Daochong Technology's battery swap cabinet solutions, visit the official website www.dochion.com, or call the customer service hotline 400-889-2008。