May 9, 2025
The development history of the natural cooling stage in the electric bicycle battery cooling system
The EcoE 5000W electric bike
Powerful Motor: EcoE is equipped with a 60V 5000W high-speed brushless motor. Due to different loads and road conditions, the electric bike drive system provides adjustable assistance, allowing you to stay healthy, relax, and exercise.
Accessories: This electric bike accessory set includes a rearview mirror, water bottle holder and bottle, a sturdy phone mount, and a waterproof phone pouch. The reinforced cargo rack allows you to easily carry extra items needed for your ride. Additionally, if you need more accessories, you can purchase a detachable storage rack, passenger safety seat, trailer, and more.
60V 32AH Battery: The bike is equipped with a high-capacity, removable 32AH battery, providing longer range per charge and over 1000 charge cycles. With pedal assist, the fat tire e-bike can travel 35-80 miles, depending on riding mode, load, and terrain. You can also purchase a spare battery for extended trips.
Comfort and Versatility: This fat tire electric bike comes with dual front suspension and rear shocks to reduce impact and strain during rides. Its 26-inch wheels, 4-inch tires, and SHIM 7-speed system offer excellent grip across diverse terrains. Front and rear disc brakes ensure safe, responsive stopping, whether on mountain trails or city streets.
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In the early stage of the development of electric bicycles, due to the limitations of battery technology and the performance of electric bicycles, the heat generated by the battery was relatively small, and the requirement for the cooling system was not high. Therefore, the natural cooling method came into being and was widely used. At that time, electric bicycles mainly aimed to meet the basic travel needs. The battery capacity was small, and the cruising range was also short, generally about 100 km, and the battery pack capacity was about a dozen kWh. Natural cooling relied on the convection of natural wind between the battery box and the outside world to dissipate heat. There was no additional cooling device. This method had the advantages of simple structure, low cost, no space occupation, no energy consumption, and no risk of liquid leakage. It could meet the heat dissipation requirements of electric bicycle batteries at that time.
As time went by, the usage scenarios and demands of electric bicycles gradually increased, and people’s requirements for the performance of electric bicycles also became higher and higher. The energy density of batteries continued to increase, and more powerful motors were applied, resulting in more and more heat generated during the charging and discharging of batteries. The limitations of the natural cooling method began to emerge. Its heat dissipation efficiency was low, and it was unable to effectively deal with the heat generated by high – power batteries. In high – temperature environments or during long – time riding, the battery temperature was prone to be too high. This would not only lead to the attenuation of the battery’s cruising range but also accelerate the aging of the battery, affecting the service life of the battery and the overall performance of the electric bicycle.
Although there were these problems, the natural cooling method was still used in some low – end or small – sized electric bicycles that were sensitive to cost and had low – performance requirements because its simple structure and low cost could meet the needs of specific consumer groups. However, with the continuous progress of electric bicycle technology, the natural cooling method gradually could not meet the mainstream needs of the market and was gradually replaced by other more efficient cooling methods, such as forced air cooling and liquid cooling.
The following is the relevant table:
| Stage | Characteristics | Advantages | Disadvantages | Application Scenarios |
|---|---|---|---|---|
| Early stage | The battery generates less heat and relies on the convection of natural wind and the battery box to dissipate heat | Simple structure, low cost, no space occupation, no energy consumption, no risk of liquid leakage | Low heat dissipation efficiency, unable to cope with high – power heat generation. The battery is prone to overheating at high temperatures, resulting in cruising range attenuation and aging | Early – stage electric bicycles that meet the basic travel needs, low – end or small – sized electric bicycles that are sensitive to cost and have low – performance requirements |
| Later stage | The performance of electric bicycles is improved, the heat generation of batteries increases, and the limitations of natural cooling become prominent | The same as in the early stage | The problem of low heat dissipation efficiency is more prominent, affecting the battery life and vehicle performance | Still used in some low – end and small – sized electric bicycles, but gradually replaced by other cooling methods |
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9000W Dual Motor Electric Bike for Adults 52MPH with Charge Voltage 63 V Battery, 26×4 Fat Tire All Terrain Ebikes, Full Suspension E Bike, SHM 7-Speed Gear Electric Bicycle
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