Shenzhen Grepow Battery Co., Ltd. UHV Semi-Solid 32Ah 14S 4.45V (TARBUHV32K14S10X)
Series: Shenzhen Grepow Battery Co., Ltd. Batteries for drones
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The Grepow UHV Semi-Solid 32Ah 14S 4.45V (part number TARBUHV32K14S10X) is a semi-solid lithium battery from Shenzhen Grepow Battery with ultra-high-voltage cells for heavy multicopters. Fourteen cells in series give a nominal 55.3 V at 32 Ah; the pack measures 121.1 × 120.5 × 222 mm.
At 4.45 V per cell the full-charge voltage of the pack is 62.3 V. 55.3 V and 32 Ah give 1,769.6 Wh; at 6,746.8 g that is 262.3 Wh/kg at pack level. The continuous current is 96 A (3C), about 5.3 kW, and a peak of 320 A is allowed for at most 15 s. The high voltage keeps current low for a given power: the same power needs less than half as much current at 55.3 V as at 22.2 V.
1,769.6 Wh is far above 160 Wh. Under the IATA passenger leaflet (February 2019 edition) the pack travels only as dangerous-goods cargo, not as a spare in hand baggage; every shipment requires UN 38.3 testing. At about 6.7 kg the pack makes up a good quarter of the 25 kg take-off mass that EU classes C3 and C4 allow. Fully charged it reaches 62.3 V, above the 60 V DC from which vehicle engineering speaks of high voltage; connectors and leads therefore call for particular care against contact and short circuit.
The charger must support 14S with 4.45 V cells. In selection the continuous current of 96 A must cover the hover current of the aircraft with reserve. Wear shows as lost cycles, growing voltage sag and deformed cells; the fourteen cell voltages are checked at the 15-pin balance lead. At 6.7 kg the pack belongs firmly mounted and protected against pressure, and storage is in the middle of the charge range as the maker specifies.
Technical data
Other data
| C-rate | 3correct |
|---|---|
| Capacity (mAh) | 32,000correct |
| Cell chemistry | Halbfest LiPo HV (4, 45 V)correct |
| Cell count (S) | 14Scorrect |
| Continuous current (A) | 96correct |
| Energy (Wh) | 1,769.6correct |
| Energy density (Wh/kg) | 262.29correct |
| Form factor | Packcorrect |
| Nominal voltage (V) | 55.3correct |
| Weight (g) | 6,746.81correct |
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