Cell board, small cylindrical, multiple cells

1SCxxxx, Cell Boards for multiple, side-by-side 18650 and 26650 cells

Each of these cell boards handles a number of small cylindrical cells in series, mounted side-by-side, in which cells in series are oriented in alternating polarity
(as opposed to a 1SC0100, which handles a single cell).
  • Matched to industry standard 18650 and 26650 sizes
  • Mounted on the side of the cells, by their welding tabs
  • One Cell Board per a number of cells (or sets of multiple cells in parallel)
    • Simplifies installation and improves reliability (though at the cost of loss of flexibility, compared to single-cell cell boards)
  • Very thin, components are placed in space between cells: as little as 0.05" is added to battery dimensions
  • A single communication wire is used between adjacent cells in a bank
  • These cell boards are done to order and require a BMS master to form a complete BMS
26650 size cell side-by-side cells with cell board Small cylindrical cell board, multiple

back to top Applications

Multiple cell boards are installed onto the cells easily.

Installation is straightforward:

  1. Place cell board on the cells
  2. Fold the tabs from the cells down onto the cell board
  3. Solder the tabs
Multiple small cylindrical cell boardClick picture to enlarge
Cell board for 15 cells in series;
straight (top) and mirror (bottom)
Multiple small cylindrical board installationClick picture to enlarge
Installing the cell board on a pack.

back to top Compatibility

These standard Cell Boards are compatible with a wide range of Li-Ion small cylindrical cells available on the market today, including:

Brand Model
A123 M1 26650
Advanced Battery Factory 18650 and 26650
Aleees HIBS 18650E - 18650, energy, 2.7 Ah; HIBS 18650P - 18650, power, 2.4 Ah; HIBS 26650E - 26650, energy, 2.7 Ah; HIBS 26650P - 26650, power, 2.4 Ah
Baoding Fengfan New Energy Co IFR18650D30 - 18650, 1.3 Ah; IFR26650D10 - 26650, 3 Ah; IFR26650D20 - 26650, 2.4 Ah
CENS Energy-Tech 18650P - 18650, power, 1.1 Ah; 26650P - 26650, power, 2.5 Ah; 26650E - 26650, energy, 3.2 Ah
Huanyu 18650
K2 Energy LFP18650P - 18650 Power 1.2 Ah; LFP26650P - 26650 Power 2.5 Ah; LFP26650EV - 26650 Energy 3.2 Ah
PHET / Pihsiang Energy Technology 18650 - 1.1 Ah
PSI 26650
Valence IFR18650E - 18650, 1.3 Ah; IFR26650 - 26650, 2.4 Ah

back to top Specifications

General specifications (for detailed specifications, please see the Lithiumate™ Manual).

Electrical Specifications

Symbol Item Conditions Min Nom Max Units
Vrange Cell voltage sensing range - 2.09 - 4.54 V
Vaccur Cell voltage sensing accuracy Within Vrange - +/-10 +/-15 mV
Isply Cell load current Stand-by - - 2.0 µA
Active,
1-reading / sec
- 1.5 2.0 mA
Balancing - 200 - mA
VISOL Isolation voltage Low voltage to battery
End cell boards
- 2500 - V

Mechanical Specifications

Item Dimensions
Pitch 13, 22.5, 26, 45 or 52 mm
PCB width Number of cells * pitch + 0.75" / 19 mm
PCB Length 2.5" / 63.5 mm
Thickness w/components, mid-bank board 0.071" / 1.79 mm
Connector height, right angle, end board 0.27" / 6.8 mm

back to top Selection

Banking

A bank can be handled in one of two ways:

  • Full bank: a single cell board handles the entire bank
  • Split bank: 2 or more cell boards handle the bank:
    • A positive cell board on its most positive cell
    • A negative cell board on its most negative cell
    • Zero or more mid-bank cell boards on any remaining cells
Bank Type Range Cable to
BMS board
Wires to adjacent cell boards
Full Full-bank Handles the entire bank
Range of Full-Bank cell board
Through two 2-pin connectors N.A.
Split Positive End Handles the post positive portion of the bank
Range of Positive-End cell board
Red and black wires through a 2-pin connector A single wire to the next cell board
Mid-bank Handles a central portion of the bank
Range of Mid-Bank cell board
N.A. Two single wires, one to the previous cell board, one to the next one
Negative End Handles the post negative portion of the bank
Range of Negative-End cell board
White and green wires through a 2-pin connector A single wire to the previous cell board

Specifically:

  • When a single cell board handles the entire bank, a "Full bank" cell board is used
  • When 2 cell boards handle a bank, a "Positive end" cell board is used at the most positive end of the bank, and a "Negative end" one is used at the most negative end of the bank
  • When 3 cell boards handle a bank, a "Positive end" cell board is used at the positive end, a "Mid bank" one is used in the middle, and a "Negative end" one is used at the negative end
  • When n cell boards handle a bank, a "Positive end" cell board is used at the positive end, n-2 "Mid bank" ones are used in the middle, and a "Negative end" one is used at the negative end

Straight vs. Mirror

There are 4 possible orientations of the cells, based on which corner of the cell board is the '+' end. To handle all 4 cases, these cell boards come in 2 versions ("straight" or "mirror"); by a 180° rotation, these two versions can handle all 4 cases.

The arrangement is slightly different between batteries with an even or odd number of cells in series.

Even number of cells     Odd number of cells

straight
'+' end at
top-left
corner:

side-by-side cells, even number of cells, + end at top-left corner

mirror
'+' end at
top-right
corner:

side-by-side cells, even number of cells, + end at top-right corner

straight
'+' end at
top-left
corner:

side-by-side cells, odd number of cells, + end at top-left corner

mirror
'+' end at
top-right
corner:

side-by-side cells, odd number of cells, + end at top-right corner
side-by-side cells, even number of cells, + end at bottom-left corner

mirror
'+' end at
bottom-left
corner:

side-by-side cells, even number of cells, + end at bottom-right corner

straight
'+' end at
bottom-right
corner:

side-by-side cells, odd number of cells, + end at bottom-left corner

mirror
'+' end at
bottom-left
corner:

side-by-side cells, odd number of cells, + end at bottom-right corner

straight
'+' end at
bottom-right
corner:

Pitch

The pitch is:

  • The spacing between alternating cell polarity
  • Also the spacing between each set of cell contacts
  • Also the the distance between adjacent circuits on the cell board

The pitch is determined by the arrangement of the cells:

  • Matrix:
    • Square
    • Narrow hex (the front row of cells is all in one plane)
    • Wide hex (the front row of cells is staggered)
  • Number of cells in parallel along the front of the battery (typically 1 or 2)
  • Cell diameter (e.g.: 18 mm for an 18650 cell, 26 mm for a 26650 cell)
Pitch Square pattern Narrow hex pattern Wide hex pattern
13 mm 18650 cells, 8S8P:
1 row square
Cells with a 13 mm pitch, square pattern
 
 
18650 cells, 8S8P:
1 row narrow hex
Cells with a 13 mm pitch, narrow hex pattern
26650 cells, 4S4P:
1/2 row narrow hex
22.5 mm 18650 cells, 8S8P:
2 rows wide hex
Cells with a 22.5 mm pitch
26650 cells, 4S4P:
1 row wide hex
26 mm 18650 cells, 8S8P:
2 rows square
Cells with a 26 mm pitch, square pattern
26650 cells, 4S4P:
1 row square
18650 cells, 8S8P:
2 rows narrow hex
Cells with a 26 mm pitch, narrow hex pattern
26650 cells, 4S4P:
1 row narrow hex
45 mm 18650 cells, 8S8P:
4 rows wide hex
Cells with a 45 mm pitch
26650 cells, 4S4P:
2 rows wide hex
52 mm 18650 cells, 8S8P:
4 rows square
Cells with a 52 mm pitch, square pattern
26650 cells, 4S4P:
2 rows square
18650 cells, 8S8P:
4 rows narrow hex
Cells with a 52 mm pitch, narrow hex pattern
26650 cells, 4S4P:
2 rows narrow hex

Connectors

Right angle connectors are standard on full bank and end boards. Cell boards with straight connectors or no connectors are also available

Part numbering

Part number: 1SC0422B:

  • 1 = Cell Board
  • SC = Small Cylindrical, top-left corner is '+' end (available: SC = top-left corner is '+' end; SM = top-left corner is '-' end)
  • 04 = 4 cells in a series (available: 2 to 16 cells)
  • 22 = 22.5 mm pitch. Available: 13, 22.5, 26, 45, 52
  • B = full bank (available: B = full bank; M = mid-bank; P = positive end; N = negative end)

back to top Ordering

These cell boards are made to order.
There is an additional NRE charge for these cell boards, for PCB layout and manufacture set-up.

To order, please see the Lithiumate BMS ordering form.

 

In this page:
Applications
Compatibility
Specifications
Selection
Ordering
 
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