How many amps of ESC can a 4S battery use? ——Comprehensive analysis of the matching problem between batteries and ESCs
In remote control models such as aircraft models and car models, the matching of batteries and ESCs is a key factor affecting performance and safety. Recently, "How many amps of ESC can be used by a 4S battery?" has become a hot topic, and many players have questions about this. This article will combine the hot discussions across the Internet in the past 10 days and give you detailed answers through structured data.
1. Basic parameters of 4S battery
4S battery refers to a battery pack composed of 4 lithium cells connected in series. Its nominal voltage is 14.8V (full charge 16.8V). The following are the parameters of common 4S batteries:
| Battery type | Nominal voltage | Capacity range | Discharge rate (C) |
|---|---|---|---|
| 4S lithium polymer | 14.8V | 1000mAh-10000mAh | 20C-100C |
2. Basis for selection of ESC current
The amperage (A) of the ESC (electronic speed regulator) needs to be determined based on the battery's discharge capacity and load requirements. The following are the key calculation formulas:
Maximum current requirement = battery capacity (Ah) × discharge rate (C)
For example: the maximum current of a 4S 5000mAh 50C battery is 5Ah × 50C = 250A.
| battery capacity | Discharge rate | Minimum current required for ESC |
|---|---|---|
| 2200mAh | 30C | 66A |
| 5000mAh | 50C | 250A |
| 8000mAh | 25C | 200A |
3. Popular model matching recommendations
According to the recent forum discussion, the following combinations are widely recognized:
| Application scenarios | 4S battery specifications | Recommended ESC |
|---|---|---|
| racing drone | 1500mAh 100C | 60A-80A |
| Off-road car model | 5000mAh 50C | 150A-200A |
| Fixed wing model aircraft | 3000mAh 30C | 80A-100A |
4. Things to note and hot issues
1.margin design: It is recommended that the nominal current of the ESC be ≥ 1.2 times the maximum current requirement to avoid overheating.
2.Voltage compatibility: Confirm that the ESC supports 4S voltage (some low-voltage ESCs only support 3S).
3.recent controversies: Some players have found in actual measurements that high C-number batteries (such as 100C) may exceed the nominal value of the ESC during short bursts. It is recommended to increase heat dissipation measures.
5. Summary
The selection of ESC current requires a combination of battery capacity, discharge rate and load type. Through the calculation formulas and matching tables provided in this article, you can quickly find the ESC solution suitable for 4S batteries. Recent discussions have shown that with the popularity of high-power equipment, players are more inclined to choose ESCs with sufficient margin to ensure system stability.
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