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Custom design and manufacture of state-of-the-art battery chargers, UPS, and power supplies for
OEMs in a hurry!
Block Diagram of the Battery Management Board Showing
Connections. In this case it is a 10 cell board.
These battery management boards are used for our li-ion
batteries that not only have high capacity, but can deliver high power. One 12 AH, 3.7 volt cell can supply 130 watts, a 4 cell
pack can supply over 500 watts at 12 volts. High-power lithium ion batteries are now a reality. They can be used as storage
cells or power sources.
Features
- For 2-14 (or more) cells in series
- Over-charge protection: 4.28±0.03V
- Over-discharge protection:2.90±0.13V
- Excess-current Protection: 60A
- <75uA Standby Current
- Separate Charging and Discharging Interface
- Discharge Short Circuit Protection
General Description
The LDB21060A-VI is over-charge/discharge protection board for
lithium-ion rechargeable batteries in series. It features an over-charge/over-discharge threshold for the battery cell voltage
during charging/discharging process, and also provides on-time protection when excess current or short circuit occurs.
Overcurrent protection:
When the current exceeds 1.8 x the rated current (for example 35 amps x 1.8 = 63
amps). Between the rated current and the absolute maximum current the board will allow up to 5 seconds of operation. So a 35
amp board will supply up to 63 amps for 5 seconds before shutting off. When the board turns off the power due to overcurrent
protection it stays off for about 5 seconds and then automatically tries again (this is called "hiccough
mode.")
Size:
The boards produced so far are approximately 20 mm x 80 mm x 60 mm. They are typically attached to
the side of the battery pack.
Battery management
boards
The battery management board is essential to maintain a safe, long lived battery pack. They have the
following functions.
1. Balance charging current among the cells in the pack to insure all cells are fully and evenly
charged.
2. Protect the cells in the pack from overcharge.
3. Protect cells from overcurrent.
4. Protect the pack
from short circuits.
5. Protect the cells in the pack from overdischarge.
For more details of these battery management
boards see the chart below, or click here.
| Battery Management Board Examples *** |
Number of cells in series |
Number of cells in parallel |
Nominal Pack Voltage |
Maximum Output Current |
Price |
| PST-LIM2S1P |
2 |
1 |
7.2 volts |
35 Amps |
$81 |
| PST-LIM3S1P |
3 |
1 |
10.8 |
35 Amps |
$81 |
| PST-LIM3S1P-150 |
3 |
1 |
10.8 |
150 Amps |
$340 |
| PST-LIM4S1P |
4 |
1 |
14.4 volts |
35 Amps |
$81 |
| PST-LIM4S2P |
4 |
2 |
14.4 volts |
35 Amps |
$86 |
| PST-LIM5S1P |
5 |
1 |
18 volts |
35 Amps |
$101 |
| PST-LIM8S1P |
8 |
1 |
28.8 volts |
35 Amps |
$94 |
| PST-LIM10S1P |
10 |
1 |
37 volts |
35 Amps |
$166 |
| PST-LIM12S1P-60 |
12 |
1 |
43.2 volts |
60 Amps |
$1020 |
| PST-LIM14S1P |
14 |
1 |
50.4 volts |
35 Amps |
$196 |
*** Battery management board for any combination of series and parallel cells are readily available with 3-5
week lead time.
Advantages:
 State of the art lithium-ion cell with laser welded stainless
steel cases, no polymer, rubber, or plastic seals.
Cells under development or available from 3AH to 60
AH.
High Discharge
rates
Priced competitive with other
battery chemistries. |
