CONNECTION TERMINAL AND POWER SUPPLY DEVICE

A connection terminal (10) includes a body portion (11) including a first end (11a) disposed on a power supply device (31) and a second end (11b) opposite to the first end (11a), two connection pieces (13a, 13b), and a support portion (12) supporting the two connection pieces (13a, 13b) and disposed at the second end (11b) of the body portion (11). An inner clamping space (135) for clamping an electrode piece (40) is formed between the two connection pieces (13a, 13b), the support portion (12) connects the two connection pieces (13a, 13b) and the body portion (11), an inner side surface (130) of each of the two connection pieces (13a, 13b) comprises a contact surface (130a) for connecting with the electrode piece (40), and the contact surface (130a) extends along a first plane (n) so that the contact surface (130a) is capable of being in surface contact with the electrode piece (40).