Surface Technology's magnetic technology breaks through the battery life bottleneck of pool robots
The pool cleaning robot market is undergoing a shift from "foreign brand monopoly" to "Made in China dominance", yet a long-standing technical pain point has never been fully resolved: when robots operate underwater, the wall-collision steering solution relying on metal spring structures is highly prone to corrosion and failure after prolonged immersion in chlorine-containing water, leading to steering malfunctions and overstated battery life. At the same time, traditional solutions are hemmed in by strict patent barriers, making it difficult for new entrants to navigate around them. Deep Cleaner, a company founded in 2022 with its factory located in Huangyan, Taizhou, Zhejiang, chose to rethink the problem from the fundamentals of physical structures, replacing springs with magnetic force, and boosting the effective operating time of its underwater robots to over 1.5 times that of its peers.
I. Magnetic Collision and Speed Detection Wheels: Redefining the Underlying Logic of Underwater Robots
The industry's standard solution uses metal springs as the wall-collision trigger mechanism. While the supporting ecosystem for this setup is mature, the inevitable physical law of elasticity degradation in springs under the erosion of pool chemicals, coupled with related patents already locked up by leading enterprises, creates barriers. The R&D team of Deep Cleaner developed a non-contact magnetic collision buffer mechanism that completely eliminates metal contact points, fundamentally avoiding chloride ion corrosion. This solution has obtained a US invention patent, resolving the batch fault risks of steering failure and elasticity degradation after long-term use, while also circumventing the traditional patent barriers.
The introduction of magnetic induction has brought about a chain of technological spillovers. R&D personnel embedded magnets inside the wheel hubs, paired with sensors to monitor wheel speed changes in real time, which gave rise to the magnetic speed detection wheel and adaptive speed regulation system — when abnormal wheel speed (such as slipping or jamming) is detected, the system automatically adjusts the propulsion power output to avoid unnecessary energy consumption. This combined solution has secured another US invention patent, delivering energy savings of over 50%. In actual working conditions, the A-series underwater cleaning robot equipped with a 5000mAh battery has a continuous operating time more than 50% longer than competing products of the same specification. In addition, the A-series is equipped with intelligent self-rescue logic (automatically reversing 4 seconds after hitting a wall, and backing out if three high-thrust attempts fail to move past obstacles) and a low-battery wall-hugging return function, translating the physical advantages of the hardware into improved reliability in real-world scenarios.
II. Self-Developed Full-Ceramic Bearing Motors: Overcoming the Service Life Bottleneck of the "Heart" of Surface Robots
The core competitiveness of the B-series surface cleaning robot lies in a self-developed waterproof motor. Surface robots rely on motors to drive propellers to generate thrust and drive rolling brushes to pick up floating debris, making the motor their "heart". Most contract manufacturers on the market rely on outsourced standard motors, forcing a trade-off between service life and cost. Deep Cleaner chose to build its own production lines, using full-ceramic bearings inside the motors — ceramic materials do not react chemically in water, are chlorine-resistant, salt-resistant, and non-corrosive. Paired with a specially designed sealing structure and winding process, the design service life is extended to 3000 hours. After 800 charge-discharge cycles, the battery degradation rate is controlled within 15%.
Cost control has been incorporated into decision-making from the R&D stage. The team's comparative data shows that outsourced competing motors in the same cost range have far shorter service lives than self-developed products, while competing products with similar service lives are priced more than twice as high. Thanks to independent control of core components, the B-series achieves a full-charge battery life of over 25 hours, supporting three power supply methods: solar panels, lithium batteries, and external fast charging. In terms of startup logic, the machine automatically wakes up about 20 minutes after the solar panel receives sunlight, and can be placed in the pool in summer and left there until retrieved in autumn without any manual intervention. The pool wall sensing uses a radar solution, replacing the industry's common infrared solution to avoid infrared malfunctions caused by interference from rain, fog, or water vapor on the water surface.
III. Backed by the Mould Industry Cluster: Building a Full-Chain Moat for Cost and Quality Control
Taizhou, known as the "Hometown of Moulds in China", accounts for the country's major production capacity of injection moulds. Pool robots happen to be a category with a very high proportion of plastic parts — the outer shell, structural components, transmission gears, and seals are all injection-moulded parts, and the quality of the mould directly determines the final precision and durability of the product. Deep Cleaner rooted its factory in Huangyan, Taizhou, building a self-owned production base of over 8,000 square meters, including a mould workshop, an injection workshop with 20 injection moulding machines, an assembly workshop, and a laboratory. By operating the most mould-dependent category in the area with the densest mould industry chain, the new product's mould opening cycle and mould repair costs have been effectively reduced.
The product line has covered the A-series underwater cleaning robots, B-series surface cleaning robots, and C-series disinfection robots (copper ion sterilizers), forming a complete solution for "underwater + surface + water quality maintenance". For overseas distributors, sourcing a full range of products from a single factory, rather than piecing them together from three different suppliers, saves the hidden management costs of coordinating multiple supply chain connections, multiple batches of logistics, and multiple after-sales service windows. On the quality control side, the overall assembly pass rate is over 99%, with 100% full inspection of core components before they go online: the pass rate of injection-moulded parts is 96%, over 99% for circuit boards, and 97% for motors. The contract stipulates that the overall product failure rate is controlled within 3%, and 2% of wearing parts (wheels, brushes, locks) are given as free gifts with shipments — after-sales data attribution shows that high-frequency failures are concentrated on these three types of small parts, while the actual failure rate of the core motors and batteries is extremely low, and minor issues on the client side can be resolved by self-replacement.
At present, Deep Cleaner has built a vertically integrated chain covering underlying technology R&D (magnetic mechanisms, self-developed motors), independent production of core moulds, and final terminal product assembly. At the industry's inflection point where competition is shifting from "price battles" to "underlying technology competition", the company has chosen not to follow the spring-based solutions or rely on outsourced motors, but to differentiate and redevelop its products from the level of materials and physical principles. At this stage, the company is seeking channel partners and industry coverage for the global market, aiming to bring the "Taizhou-made" pool robot solutions into a broader system of mid-to-high-end overseas distributors.