摘要：NOTE：Click here for the Chinese version.It's hard to say exactly when it started, but small appliances have become increasingly po
NOTE：Click here for the Chinese version.It's hard to say exactly when it started, but small appliances have become increasingly popular among contemporary consumers. Both traditional home appliance manufacturers and emerging internet companies have set their sights on the small appliance industry, leading to the emergence of various novel and interesting gadgets. Today, eefocus will teardown a Baseus car vacuum cleaner, the A2 Pro, to explore the hardware solution inside this popular product.
The Baseus A2 Pro features a capsule-shaped design. After removing the front suction head, the main body is only about the size of a water cup, making it suitable for storage in narrow spaces like door compartments or cup holders on the center console. The most eye-catching feature of the A2 Pro is its "One-Key Overclocking" function. When the overclocking mode is activated, the suction power can instantly surge to 6000Pa, with the motor speed reaching up to 50,000 r/min. This function is designed for cleaning larger particles, such as spilled cat litter, rice grains, or even gravel from car mats. Additionally, the A2 Pro innovatively incorporates a "blowing" function, complete with a dedicated blowing tube. This allows users to first blow away dust settled in crevices before vacuuming it up. After this brief overview of its functions, let's take a look at its hardware solution.
TeardownAs the structural design of the A2 Pro was not initially clear, the teardown was essentially conducted in a semi-destructive manner. After disassembly, it became apparent that if one knows the locations of the structural clips, a largely non-destructive teardown is possible. Consider this as paving the way for other enthusiasts.During the teardown, the internal structure was noted to somewhat resemble that of an electric toothbrush. The three main components identified after disassembly are the suction motor, the battery, and the mainboard.The motor used is a high-suction 390 motor from Tongjing Motor. The basic parameters are printed directly on the motor casing: 395WM 11.1V 7.0Kpa. "395WM" likely refers to the motor's no-load speed (e.g., 39,500 RPM); "11.1V" is the motor's rated operating voltage; "7.0Kpa" indicates the maximum vacuum pressure the motor can generate. This is probably a theoretical laboratory value, representing the maximum "suction force" under extreme conditions like a completely blocked intake, not the real-world suction during normal use. The provided data for the A2 Pro, showing suction surging to 6000Pa in overclocking mode, corroborates this. For the battery, the A2 Pro uses an ICR18650-3S1P power battery from Meizhou Bofuneng Technology. It consists of 1 cell at 3.7V, 2000mAh; 3 cells in series provide 11.1V, resulting in 22.2Wh, which powers the suction motor. Finally, let's examine the A2 Pro's main PCB, which is relatively simple.
The core microcontroller is an 8-bit MCU from CMSemicon (Zhongwei Semiconductor), from the SC8Fx series. It handles functions like processing data from the motor temperature sensor, controlling the power/function button board, and controlling the motor driver. An LDO from MicrOne (Nanjing Micro-Mege Electronics) supplies power to the MCU. Next to the MCU is the vacuum cleaner's lithium battery charging management chip, which handles charging via the Type-C interface. The suction motor drive is implemented using a MOSFET and a freewheeling diode combination for driving and protection. The freewheeling diode is connected in parallel across the motor interface, providing a discharge path to protect the MOSFET. This essentially covers the internal hardware circuitry of the A2 Pro, which is relatively straightforward.
SummaryThe A2 Pro incorporates many commendable designs at the user experience level, such as one-key overclocking and the dual suction/blowing functionality. From a teardown perspective, its structural design and component layout make the product somewhat difficult to repair. However, the domestic chip-based hardware solution once again demonstrates that in China's consumer electronics field, domestic chips are everywhere!来源：与非网
