A large capacity lithium-ion-battery pack includes an dielectric housing having receiving barrels; single lithium ion batteries each received in a receiving barrel and comprises an anode currency collector and a cathode currency collector; a dielectric cov...

A cap assembly (100, 200) for a lithium ion secondary battery (1000, 2000). The cap assembly includes a cap plate (30, 97), a leakproof film (20, 98), and a cap cover (10, 99). The cap plate (30, 97) includes a supporting portion (31, 971) and a safety fil...

A power battery system includes a number of parallel groups that being connected in series and a number of improved electrode boards. Each of the parallel groups comprising a number of single batteries connected in parallel. Each of the improved electrode ...