Railcraft: Add a charge battery(ies)

[Generalcamo]

Batteries will allow for long-range electric tracks to have buffers attached to them for better reliability, and in the future allow for storage for Charge Machinery.

Planned Types:

• [x] Nickel-Iron - Targeted for initial implementation - medium energy/volume, very poor charge retention, good draw rate, 80% charge efficiency
• [x] Nickel-Zinc - high energy/volume, mediocre charge retention, poor draw rate, 70% charge efficiency
• [ ] Lead-Acid - Wait on ChemLab - low energy/volume, good charge retention, high draw rate, 85% charge efficiency
• [x] Zinc-Carbon - low-medium energy/volume, very good charge retention, pre-charged single use
• [x] Zinc-Silver - very high energy/volume, very good charge retention, pre-charged single use

Issues:

• #1209 - Zinc Ore
• The system currently doesn't know how to handle non-rechargeable sources. This is actually a tricky problem. Should it draw from non-rechargeable sources (which includes single use batteries, generators, and the ic2 feeder) to charge rechargeable ones . Or should there be four types each handled differently (rechargeable, infinite, single-use, generator). How do we calculate network efficiency and max draw for theses things? More design work is needed here.

http://www.mpoweruk.com/specifications/comparisons.pdf
https://en.wikipedia.org/wiki/Comparison_of_commercial_battery_types

[liach]

Ref #1203

[Generalcamo]

Zinc would probably require another ore. However, I would also propose Zinc-Carbon if we go that route, which would function as a single-use battery.

[EnderiumSmith]

what about LI-ion? id say very high energy/volume, very good charge retention, good draw rate, 90% efficiency. a have no idea where would you get Lithium tho.

[CovertJaguar]

I could have sworn a wrote down a bunch of numbers for this somewhere....

[CovertJaguar]

The two disposable batteries are implemented, but they need some texture tweaking and need some more attention on how to handle initial charge state and how to handle a discharged state.