From Unofficial Zero Manual
The 2017 model year shifted Zero's battery assembly to a "half monolith" or "long brick" configuration containing the same number of cells as for 2 bricks. A single BMS manages the cells in both stacks.
- Model Changes
- The 2017 S and DS models offer a 2p arrangement using a single long brick arranged along the forward half of the monolith frame area.
- This configuration leaves the rear half of that area empty for a storage bin accessed from the side of the frame.
- The prior 3p configuration is no longer for sale, but can be created by adding a Power Tank.
- The long brick for this model does not have the same gapped casing that a Monolith has
- So, it is less insulated from cold but dissipates heat better.
- The 2017 X platform bikes are delivered by default with a non-removable long brick.
- They are available optionally with single removable bricks like prior model years for an additional cost of about $500.
- The long brick arrangement figures suggest that each brick aligns its cells with the other brick.
- Layout appears to be more efficient as a result.
- Interconnects between the bricks seem to be trivial and nearly-zero-resistance, improving cell life.
- There is unsupported speculation that 56s1p arrangement is a possible future evolutionary step as a result.
- Long brick Monoliths
- For 2017 packs, made with "long bricks", the interconnects are extremely simple, only connecting two stacks which are aligned directly against each other.
- 2017 monoliths consist of two "long bricks" with simpler interconnects.