Personal Care

The predicament

Lily Cover's latest innovation, the Oxygen Injection Beauty Instrument, utilizes advanced high-pressure nano-oxygen injection technology to deliver moisture directly to the skin's basal layer, ensuring deep hydration. Previous battery suppliers encountered issues with insufficient power and capacity, leading to battery inflation and motor power loss, greatly impacting product usability. After evaluating several lithium battery manufacturers, Lily Cover selected Cowon Battery for its extensive experience in the industry, effectively resolving these challenges.

Problem-solving Approach

Cowon diligently conducted thorough research on Lily Cover's oxygen-injection beauty device to identify the root cause of the issues and devised a tailored battery solution.
1.The primary factor contributing to battery inflation in the oxygen injection device may stem from overcharging, causing the battery to exceed its designated voltage range and generate excess gas, leading to bloating. Additionally, the battery cells themselves exhibit poor resistance to overcharging, making them susceptible to inflation when voltage surpasses 4.25V. To address this, Cowon meticulously produces the 7.2V 950mAh 104260 battery by initially pairing and aging cells after production, followed by rigorous K value testing to ensure consistent voltage and capacity between paired cells. Furthermore, enhancements are made to enhance the overcharge resistance of individual cells, preventing inflation even if a single cell is charged to 4.25V.
2.In environments with high humidity, such as humid or vapor-rich areas, moisture infiltration into the device through pores or interfaces poses a significant risk. Cowon implements a protective board glued battery and a double-layer PVC waterproof design to mitigate water seepage effectively.
3.During motor operation, excessive load or surpassing the motor's rated power triggers the overload protection mechanism, resulting in power loss to prevent damage and impeding normal device operation. To resolve this issue, Cowon engineers replaced the battery's PCB and bolstered overcurrent protection to facilitate uninterrupted motor functionality.

Accomplishments Attained

Upon integrating Cowon's upgraded battery solution, Lily Cover's product saw a notable elimination of battery bloating and water seepage concerns. This led to prolonged usability of the oxygen injection meter and an enhanced product experience for customers. As a result of these improvements, sales of the oxygen injection meter surged by 30% compared to previous levels.
Currently, Lily Cover and Cowon have sustained a collaborative relationship for three years, with a defect ratio well below one ten-thousandth.