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Teardown · Robot vacuum
A Qrevo Curv 2 Flow was opened down to its main board, battery, suction fan and LiDAR. The battery label and the LiDAR board read in full. The processor does not: Roborock keeps it under a soldered metal shield, and the test lab left the shield on.
Tap a number
Each number is a part found in the teardown. X-ray fades the shell to show where the parts sit inside.
The 3D shape is our own approximate drawing, sized from the teardown photos, not the maker's CAD. Parts sit roughly where they were found.
Board names as printed on the boards; sizes are approximate.
Wraps round the suction fan and dust bin. One half holds the processor under its shield, the Wi-Fi module and a USB-C socket; the other half holds the motor and pump power circuits and most of the connectors. PCB made by Seegem.
Sits under the spinning laser turret. Its pads are labelled by signal, which spells out how the sensor works.
Read: the name is printed on the part and legible. Inferred: our best reading, explained. Not visible: under a shield or too small to read.
A Roborock lithium-ion pack, model BRR-42C-5200AD: 14.4 V rated, 5200 mAh typical (4900 mAh rated), 74.88 Wh, 70.56 Wh nominal, charged to at most 16.8 V. Made by Huizhou Desay Battery.
Its cell code, 4ICR19/66-2, means eight cylindrical 18650-size cells: four in series, two in parallel. The 5200 mAh matches the capacity Roborock advertises for this model.
The laser distance sensor on top sits on a round board marked DY-07, part code 301010527, version V1.2, dated 2025-04-22. Its test pads are labelled by signal: VCC_LD (laser diode power), DET_PWR (detector power), ANGLE (angle sensor), MOT+ / MOT− and PWM_CTL (the spin motor and its speed), TXD / RXD (the serial link to the main board) and BOOT.
What that tells you. A laser, a light detector, a motor that spins them and a sensor that knows the angle: the robot measures the distance at every angle, many times a second, and builds the map from that.
A U-shaped board about 22 cm across, silkscreened BERYL LITE_MAIN B1 and made by Seegem. "Beryl Lite" looks like Roborock's internal name for the platform. One arm carries the computer, the other the power circuits for the wheels, brushes, fan and pump.
A USB-C socket on the board is not reachable from outside the robot, so it is most likely for factory programming and service.
The processor and its memory sit under a soldered metal can. The lab photographed the can, not what is under it, so the chip is not named here. A memory chip outside the can and a microcontroller on the underside are visible, but their markings are too small to read in the photos.
A small square module next to the USB-C socket carries the Wi-Fi radio, with a cable to a separate printed antenna. The antenna is marked Coral Pro WIFI V0.3, a name that points to another Roborock project, reused here. The chip on the module is too small to read in the photos.
A blower module: a round motor at one end driving an impeller in a spiral housing. Its label is only partly legible, so we do not give a part number.
Roborock does not grind its chips like Unitree does; it covers the processor with a soldered metal shield, as most radio products do. The shield stayed on for testing, so the processor is the one part here we cannot name. Everything that wears out or fails, the battery, the LiDAR, the fan, is readable.
| Part | What is printed on it | Role | Sure? |
|---|---|---|---|
| Battery | BRR-42C-5200AD · 14.4 V · 5200 mAh · 74.88 Wh | Power | Read |
| Battery cells | 4ICR19/66-2 (8 × 18650-size) | Inside the pack | Read |
| Battery maker | Huizhou Desay Battery | Pack supplier | Read |
| LiDAR board | DY-07 · 301010527 · V1.2 · 2025-04-22 | Laser distance sensor | Read |
| Main board | BERYL LITE_MAIN B1 · Seegem | Connects everything | Read |
| Processor | (under a metal shield) | Navigation, app | Not visible |
| Wi-Fi module | (chip too small to read) | App connection | Not visible |
| Wi-Fi antenna | Coral Pro WIFI V0.3 | Wi-Fi | Read |
| Service port | USB-C on the main board | Factory programming | Inferred |
| Suction fan | (label partly legible) | Suction | Inferred |
The pack is BRR-42C-5200AD: 14.4 V, 5200 mAh, eight 18650-size cells (4S2P), with a four-wire lead and plug. Match the model number, voltage and connector when replacing it.
A "LiDAR" or "laser sensor" error often comes down to the spinning turret: dirt on the window, a jammed turret or a failing spin motor. The motor, the laser and the angle sensor all sit on the same DY-07 board.
A Roborock pack marked BRR-42C-5200AD: 14.4 V, 5200 mAh typical (4900 mAh rated), 74.88 Wh, made by Huizhou Desay Battery. Inside are eight cylindrical 18650-size cells, four in series and two in parallel (cell code 4ICR19/66-2).
A spinning laser distance sensor on a round board marked DY-07 (part code 301010527, V1.2, dated 2025-04-22). Its pads are labelled for the laser diode, the light detector, an angle sensor, the spin motor and its speed control, and a serial link to the main board.
In the Qrevo Curv 2 Flow: a U-shaped main board marked BERYL LITE_MAIN B1 with the processor under a metal shield, a soldered Wi-Fi module, a LiDAR board, a blower suction fan and a 14.4 V, 5200 mAh battery of eight 18650-size cells.
Based on laboratory teardown photographs of a test unit, 2025. The photos are not reproduced here; sizes are approximate. Production units may differ. Not affiliated with Roborock. Spotted a mistake? Tell us and we will fix it.
Plain-text version for AI tools: /ai/roborock-qrevo-curv-2-flow.md · all references