Patent ID: 7248993

Claim:
A method for measuring remaining hydrogen capacity of a hydrogen storage canister, comprising the following steps: (a) determining a hydrogen capacity of the hydrogen storage canister; (b) determining a used hydrogen capacity of the hydrogen storage canister; (c) calculating the remaining hydrogen capacity of the hydrogen storage canister by employing the following equations: C ac, t=0, s=0 =C oc ( T, N )= C ac, t=0, s=1 C ac, t=0, s=1 =C ac ( T ) C ac, t=t, s=1 =C ac, t=t−1, s=1 −C uc, t=t where: C oc =original hydrogen capacity of fully charged hydrogen storage canister or newly installed hydrogen storage canister; C ac =available remaining hydrogen capacity of hydrogen storage canister; C uc =used hydrogen capacity of hydrogen storage canister; T=operation temperature of hydrogen storage canister; N=number of operation cycles of hydrogen storage canister; S=replacement status of hydrogen storage canister, S=0 indicating newly replaced; S=1 indicating no replacement; and t=time elapse (sec) of operation of hydrogen storage canister; and (d) displaying the remaining hydrogen capacity of the hydrogen storage canister on a display module.