How to Perform Battery Balancing for New Energy Vehicles?
3 Answers
New energy battery balancing methods are mainly divided into chemical balancing methods and physical balancing methods. Among them, the chemical balancing method actually uses redox pair additives to achieve overcharge protection, but this method has not yet been widely adopted. Physical balancing methods are further categorized into passive balancing and active balancing based on whether there is energy loss.
I've been driving a new energy vehicle for several years, and the most frustrating issue is the uneven aging of the battery over time, where some parts charge and discharge inconsistently. Battery balancing is about keeping the battery modules in the car in a similar state to prevent premature aging in certain sections. How to achieve this? First, use a slow charger for daily charging instead of relying too much on fast charging stations, as fast charging is more likely to cause overheating and imbalance in individual cells. I make it a habit to plug in the charging cable and let the car adjust automatically—most vehicles come with a balancing function that gradually equalizes the voltage. Also, avoid waiting until the battery is almost empty to recharge; instead, charge when it drops to around 20% and stop at 80%. Perform a deep cycle once a month by discharging the battery from full to low and then charging it back to full—this helps the system identify and recalibrate problematic cells. Once, I neglected this, and my range dropped significantly. After taking it to the service center, they found it was due to imbalance and fixed it by resetting the system with diagnostic tools. Now, I also regularly check the battery health app, and temperature control is crucial—avoid parking in direct sunlight during summer, as high temperatures accelerate imbalance. By adopting these small habits, I've extended my battery's lifespan, saving money and hassle, and most importantly, ensuring safe driving without worries.
I find battery balancing quite fascinating. Essentially, it's the vehicle's built-in intelligent system monitoring the status of each battery cell to prevent overcharging or complete discharge of individual cells. How does it work? Primarily during charging: When I use a slow charger, the car's BMS system operates in the background to automatically balance voltages. Software/firmware updates are also crucial – I once experienced temporary imbalance due to a bug in the old version, which smoothed out after updating. Additionally, choosing smart charging stations helps significantly – some can automatically slow down charging to adjust cell matching. Once when I didn't charge for an extended period, the cell variation increased, causing a 50km range loss. Through this experience, I learned to check the battery status via app before charging and address any low health readings. Extended to maintenance: Regular professional inspections are essential, especially every 5,000km or so. Most new vehicles feature automatic balancing activation during parking – driving for a few minutes to warm up can trigger it. These practices help me maintain high efficiency and durability while preventing unexpected failures.
