Joh, Han-Ik Ha, Tae Jung Hwang, Sang Youp Kim, Jong-Ho Chae, Seung-Hoon Cho, Jae Hyung Prabhuram, Joghee Kim, Soo-Kil Lim, Tae-Hoon Cho, Baek-Kyu Oh, Jun-Ho Moon, Sang Heup Ha, Heung Yong 2024-01-20T20:02:22Z 2024-01-20T20:02:22Z 2021-09-01 2010-01-01 0378-7753 https://pubs.kist.re.kr/handle/201004/131795 In this study, a direct methanol fuel cell (DMFC) system, which is the first of its kind, has been developed to power a humanoid robot. The DMFC system consists of a stack, a balance of plant (BOP), a power management unit (PMU), and a back-up battery. The stack has 42 unit cells and is able to produce about 400 W at 19.3 V. The robot is 125 cm tall, weighs 56 kg, and consumes 210 W during normal operation. The robot is integrated with the DMFC system that powers the robot in a stable manner for more than 2 h. The power consumption by the robot during various motions is studied, and load sharing between the fuel cell and the back-up battery is also observed. The loss of methanol feed due to crossover and evaporation amounts to 32.0% and the efficiency of the DMFC system in terms of net electric power is 22.0%. (C) 2009 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV SENSOR-LESS CONTROL PORTABLE APPLICATIONS STACK PERFORMANCE OPERATION A direct methanol fuel cell system to power a humanoid robot Article 10.1016/j.jpowsour.2009.07.014 1 JOURNAL OF POWER SOURCES, v.195, no.1, pp.293 - 298 JOURNAL OF POWER SOURCES 195 1 293 298 scie scopus 000272883200042 2-s2.0-69549137935 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article SENSOR-LESS CONTROL PORTABLE APPLICATIONS STACK PERFORMANCE OPERATION Direct methanol fuel cell Load sharing ratio Efficiency Fuel cell/battery hybrid system Robot