Low temperature battery attenuation problem: BYD electric cold storage forklift technical solution sharing

In the low-temperature storage operation scenario, one of the core pain points facing electric forklifts is the problem of battery attenuation in low-temperature environments, which will not only greatly shorten the battery life of a single operation, but also reduce the overall service life of the battery and improve the comprehensive cost of storage operations. Clarifying the incentives for low-temperature battery attenuation and matching targeted technical adaptation solutions can effectively solve this industry pain point.

Core Causes of Battery Decay in Low Temperature Environments

The low temperature environment will lead to a significant decrease in the activity of the electrolyte inside the battery, and the resistance to ion migration will be greatly increased, directly reducing the conversion efficiency of charge and discharge, and the discharge capacity can only reach 60% to 70% of the normal temperature state. In addition, the temperature difference caused by the frequent entry and exit of forklifts into and out of the cold storage is easy to form condensation on the surface of the battery compartment and electronic control components. Long-term accumulation will erode components, further exacerbate the attenuation of battery performance, and in extreme cases may also cause safety hazards.

The core technology adaptation scheme of electric cold storage forklift

Cell and temperature control system optimization

For low temperature scenarios, wide temperature range batteries are adapted, and a high-density insulation layer is installed around the battery pack. With an intelligent preheating system, when the ambient temperature is lower than the set threshold, the system will automatically start the preheating function to stabilize the operating temperature of the battery cell within a reasonable range, reducing the impact of low temperature on the battery cell activity from the root cause and reducing unnecessary performance losses.

Vehicle seal and anti-condensation design

Enhance the sealing protection level of battery compartment and vehicle electronic control components, and spray anti-condensation special coatings on the surfaces of key components to avoid water vapor from temperature differences from invading the internal structure, reduce the risk of condensation on electronic components, and ensure the stable operation of the vehicle circuit system under temperature fluctuations.

Low temperature scene charging and discharging strategy adjustment

Optimize the charging and discharging logic of the whole vehicle for the low temperature environment, and appropriately lower the discharge current threshold at low temperature to avoid additional battery loss caused by high current discharge. During the charging stage, a battery pre-temperature process is added, and regular charging is started after the battery temperature rises to a reasonable range to avoid problems such as virtual electricity and battery damage caused by low temperature charging.

Key points of daily maintenance of forklift batteries in low temperature scenarios

In daily operations, try to avoid the forklift being idle in a sub-zero extreme environment for a long time. During non-working hours, the vehicle can be parked in a transition area with moderate temperature. Regularly check the integrity of the battery insulation layer and sealing structure, and repair it in a timely manner if it is damaged. At the same time, strictly follow the standard low-temperature charging process. Do not directly charge the vehicle in an extreme low-temperature environment.

These technical solutions have been validated in a large number of low-temperature storage scenarios, which can effectively reduce the battery decay rate in low-temperature environments, extend the overall service life of electric forklifts, and help low-temperature storage operators reduce comprehensive operation and maintenance costs and improve operational efficiency.