Author: Lia Publish Time: 2025-09-04 Origin: Site
In the field of battery management systems (BMS), one of the most overlooked risks to lead-acid and Ni-Cd batteries is ripple current and ripple voltage. Though often invisible, these electrical disturbances act like silent killers, reducing battery lifespan and threatening the reliability of critical backup power systems in data centers, substations, and telecom sites.
A battery’s ideal charging and discharging process should be smooth DC power. However, due to high-frequency switching in chargers and UPS systems, unwanted AC components appear:
Ripple Current – AC component superimposed on the DC current, fluctuating with load and charge/discharge cycles.
Ripple Voltage – AC fluctuation superimposed on the DC voltage, measured in peak-to-peak or RMS values.
These ripples typically occur in the 50Hz–1kHz range and, although invisible, exist in every charging cycle.
For any battery monitoring system, ignoring ripple is dangerous. Over time, ripple causes irreversible damage:
Accelerated Plate Corrosion – Ripple current leads to shedding of active materials, reducing service life.
Excessive Heat – Ripple increases resistance and heat generation; every 10°C rise doubles chemical reactions, speeding electrolyte evaporation.
Capacity Loss – Long-term ripple exposure reduces effective capacity by 30–50%, undermining battery health monitoring and system reliability.
Why Standard Battery BMS Systems Are Not Enough？
Most battery BMS solutions only measure static parameters like voltage and current, neglecting ripple effects. This is like checking body temperature but ignoring blood pressure swings — critical health signals are missed.
That’s why advanced battery monitoring systems must include dedicated ripple monitoring to ensure real reliability.
As a global provider of battery management systems, DFUN offers the PBMS9000 Series, designed specifically for large-scale data centers, substations, and critical infrastructure. It goes beyond traditional monitoring with advanced ripple detection:
1. High-Precision Measurement
Ripple Current: 0~400A peak, 50Hz–1kHz, resolution 0.01A
Ripple Voltage: 2~100VDC peak, resolution 0.01V
Integrated monitoring of voltage, resistance, SOC, SOH, and temperature
2. 24/7 Battery Health Monitoring
Real-time online monitoring with 5-year data storage
Multi-level alarms via SMS, email, and mobile app, response < 10s
3. Scalable & Robust BMS System
Supports up to 6 battery strings (420–480 cells) for VRLA and Ni-Cd batteries
Anti-interference design ensures reliable operation in UPS environments
Supports Modbus, SNMP, MQTT, and IEC61850 protocols for seamless integration
4. Reliable, Certified Solution
Compliant with CE, FCC, RoHS, UL certifications
Dual power design ensures monitoring never shuts down
In top projects with Google data centers and other global top five data center companies, the PBMS9000 series has proven its value.
In an international data center, PBMS9000 detected ripple abnormalities 6 months in advance, preventing a major UPS outage.
Battery lifespan extended by 40%, significantly reducing replacement costs.
Batteries are the last line of defense in any battery management system, and ripple is a hidden but serious threat. The DFUN PBMS9000 Series provides next-generation battery monitoring system capabilities, delivering real-time ripple detection and advanced battery health monitoring.
DFUN PBMS9000 — a smarter, safer, and more reliable BMS solution for lead-acid and Ni-Cd batteries in mission-critical power systems.
Contact DFUN today to discover how our advanced battery BMS solutions can protect your energy infrastructure.
