can prevent the dust, The battery should be designed so that even if the battery leakage occurs, the electrolyte can not reach the
protection circuit board; battery design should ensure that the battery is fixed in the battery pack, can not move; battery pack
in the structure should ensure that The use of materials such as double-sided tape and rubber should verify its flammability;
welding mold should be sealed with glue; if the welding die in the sealed when the welding of the mold can not be used, The use
of ultrasonic welding method, for the emergence of any defects, God does not bear anything Either.
1.4.2 Battery pack structure (battery pack limits the number of batteries used)
The number of parallel connections is unlimited, but the battery pack must pass the overcharge test (the charging current of the
overcharge test is the maximum charge current of the charger and the product of the parallel quantity); the number of series is
unlimited and the fuse is required; the battery should be away from the heat Device to avoid deterioration of battery performan-
ce; PCBA circuit board and battery pack should be insulated between the insulation material (such as plastic barrier to provide air
isolation or non-conducting thermal insulation material).
If charged and discharged at high rate and high temperature (≥35°C) frequently, cell cycle life will be shorten. If charged and
discharged at high temperature (≥60°C) frequently, cell safety may be occurred.
1.4.3 Protection Circuit insure safety of battery
The following protection circuit should be installed in the battery pack:
Overcharge protection:
For safety reasons and in order not to shorten the cycle life, the maximum overcharge protection voltage
for the individual cells within each module should be less than 4.23V (including tolerances);
Over discharge protection:
If the single cell voltage reaches 2.5V, we recommend that the discharge protection should cut off the
discharge current, the circuit current consumption should be as small as possible;
Overcurrent protection:
If the discharge current of the single cell exceeds about 10A, the overcurrent protection should cut off the
discharge current circuit.
External short protection:
The battery pack has function not to cause external short cut.
Over temperature protection:
Set the temperature protection of pack according to the cell use condition in SPEC.
Battery pack should have cell voltage balancing function and cell imbalance protection circuit.
Battery pack should have function to avoid thermal propagation when the cell is failure.
Weld spot welding lead plate onto cell, and solder lead wire or lead plate. the battery pack in the discharge, the internal cell tem-
perature difference should be less than or equal to 5°C.
In order to avoid long-term storage over discharge mode, battery pack protection circuit current consumption should be set as
small as possible. Long-term use, to regularly check the remaining state of electricity, to ensure that the battery within the single
cell can not achieve over-discharge state.
1.4.4 Cell connection
Do not solder onto a cell in order to avoid a damage on the cell.
The battery pack should be equipped with appropriate shock absorbers in the pack in order to minimize shock, which can damage
the cells.
1.5 CELL USAGE
1.5.1
When using batteries for serial and use, use the same gear, the same batch and the same state of charge batteries,
you can get this information from the inside and outside the box label. Batteries need to be used before the detection
of voltage resistance, and in accordance with its use for the combination
. It is recommended at least to ensure that the
use of batteries within 30mV voltage within the internal resistance within 6mΩ.
9
INR 21700 50 E
Handling Instructions
TerraE Confidential Proprietary and not be reproduced without written permission from BMZ Germany GmbH, Zeche Gustav 1, 63791 Karlstein
