What Are the Causes of New Energy Battery Failures?

[DeclanLynn]

New energy battery failures are as follows: Battery Wear: Excessive battery wear can cause failures, such as overuse of the battery, harsh operating environments, etc. Additionally, batteries with a lifespan below standard are more prone to failures during use. Management System Failure: Failures in the management system during use can easily lead to overload operation of the car battery, affecting its lifespan and causing issues such as inability to fully charge or insufficient voltage. Ignition Coil Failure: Ignition coils are prone to aging, wear, and oxidation in high-temperature operating environments, leading to short circuits and leakage.

[DeAlex]

I've seen many issues with new energy vehicle battery failures, mainly caused by improper usage habits. The most common problems are overcharging or over-discharging; for example, some people use fast charging daily for convenience, which accelerates lithium-ion deposition and aging inside the battery over time. High-temperature environments are also a contributing factor—parking the car under direct sunlight in summer can rapidly increase battery temperature, potentially leading to thermal runaway risks. Physical damage should not be overlooked either; even a minor rear-end collision that deforms the battery pack may cause a short circuit. Additionally, software bugs in the Battery Management System (BMS) or faulty sensor misreporting are common issues, such as sudden inaccuracies in battery level displays. Aging is inevitable—after several years of use, electrode material degradation leads to reduced capacity. Preventive recommendations include adhering to charging guidelines, conducting regular inspections, and avoiding extreme conditions to extend battery life.

[HarmonyLynn]

As a new energy vehicle user, I've found that battery issues often stem from daily negligence. For example, driving without preheating in winter causes lithium-ion activity to decrease due to low temperatures, leading to sudden range reduction. Repeated occurrences can easily cause malfunctions. Charging methods are also crucial; frequent use of non-original fast chargers accelerates internal heat accumulation and shortens battery life. Once, I forgot to turn off the air conditioning while charging, causing battery overload alarms and nearly burning it out. Physical factors like curb impacts while parking can damage battery packs, where even minor damage can render modules ineffective. Aging is inevitable; after three years, new cars noticeably take longer to charge. Environmental factors like high humidity during rainy days can corrode battery seals. For proper maintenance, stick to slow charging and maintain ideal temperatures between 20-30°C.

[Tyrone]

From a battery technology perspective, failures often stem from lithium chemical reaction imbalances. Overcharging causes lithium metal dendrite growth that punctures separators leading to short circuits; over-discharge lowers voltage excessively, damaging electrode coatings and degrading performance. High temperatures decompose electrolytes, generating gas and increasing risks of battery swelling; low temperatures increase internal resistance, reduce heat dissipation, and cause unstable output. Internal cell imbalance commonly occurs due to manufacturing tolerances, with individual cells failing quickly from overcharging or undercharging. Aging results from the depletion of active materials through cycling and natural degradation. BMS control errors, such as inaccurate voltage detection misleading charging strategies, can also trigger issues. Prevention methods involve using intelligent charging/discharging systems to monitor status and detect abnormalities early.