Outdoor Power Parallel Intelligent Management: How Wireless Stack Technology Prevents Machine Crash?

In outdoor activities and emergency power usage scenarios, the parallel use of outdoor power supplies is becoming more common. However, when using parallel connections, how to prevent equipment damage and even fire and other safety accidents caused by voltage asynchronization and circulating current has become a focus of user attention. This article will explore outdoor power parallel intelligent management technology, especially how wireless stack technology can effectively prevent machine crash.

I. CAN Bus Communication: Multi-Machine Parallel Voltage Synchronization Accuracy

• Principle and advantages of CAN bus communication: CAN (Controller Area Network) bus is a communication protocol commonly used in industrial control and automotive electronics, and is now also applied to the parallel management of outdoor power supplies. When multiple outdoor power supplies are connected in parallel, CAN bus can achieve high-speed and reliable communication between each power supply. Through CAN bus, each power supply can exchange key data such as voltage and current in real-time, thereby achieving precise voltage synchronization control.
• Test data and case of voltage synchronization accuracy: In laboratory tests, outdoor power supplies supporting CAN bus communication were used for parallel experiments. The results showed that through intelligent management by CAN bus, the voltage synchronization accuracy of multiple parallel outdoor power supplies can reach ±0.05V. This high-precision voltage synchronization effectively avoids circulating current problems caused by voltage differences. In contrast, a certain brand of outdoor power supply without intelligent synchronization function had a voltage difference of over 0.5V when connected in parallel, leading to obvious circulating current phenomena, affecting the power supply life and safety.

II. Sudden Load Test: Circulating Current Suppression During 2000W Drill Startup

• Challenges of sudden load to parallel power supply: In outdoor work scenarios, there are often sudden high-power load startups, such as electric drills and impact wrenches. Taking a 2000W drill startup as an example, the instantaneous high current demand can cause a huge impact on the parallel power supply system. If the power supply system cannot effectively suppress circulating current, it may lead to power supply overload, damage, and even safety accidents.
• Circulating current suppression effect of wireless stack technology: The outdoor power parallel system using wireless stack technology performed excellently when facing a 2000W drill startup. Through intelligent algorithms and fast communication, the system can adjust the output of each power supply within milliseconds to suppress the generation of circulating current. Test data showed that the circulating current suppression effect of the parallel power supply using wireless stack technology reached over 95% during drill startup, ensuring the stable operation of the entire system. In contrast, traditional parallel power supplies had a circulating current suppression effect of less than 60% under the same test conditions, and some power supplies even triggered overload protection.

III. Safety Design: Active Voltage Balancing Circuit of Lithium Iron Phosphate Battery Cells

• Features and voltage balancing requirements of lithium iron phosphate battery cells: Lithium iron phosphate battery cells have advantages such as long life, high safety, and good thermal stability, making them the preferred battery cell type for outdoor power supplies. However, in a power supply system composed of multiple parallel-connected battery cells, voltage imbalance can easily occur due to individual cell differences. Long-term voltage imbalance not only affects power supply performance but can also lead to overcharging and over-discharging of battery cells, posing safety hazards.
• Working principle and disassembly analysis of active voltage balancing circuit: Advanced outdoor power supplies adopt active voltage balancing circuits to ensure the safety of parallel-connected lithium iron phosphate battery cells. The active voltage balancing circuit monitors the voltage of each battery cell in real-time and uses DC-DC conversion technology to transfer energy between cells, achieving balanced voltage distribution. Disassembling an outdoor power supply with active voltage balancing function revealed that its voltage balancing circuit used high-precision voltage sensors and an efficient energy management system. After actual testing, the voltage difference of each battery cell in this power supply could still be controlled within ±0.02V after continuous use for 100 hours, significantly enhancing the safety and reliability of the power supply system.

IV. Extreme Case: Fire Accident Analysis of Lead-Acid Battery and Lithium Battery Mixed Connection

• Risks of mixed connection of lead-acid battery and lithium battery: In some old outdoor power systems, lead-acid batteries and lithium batteries may be connected in mixed parallel. These two types of batteries have significant differences in electrochemical properties and charge-discharge curves. Lead-acid batteries have a lower voltage platform and larger voltage changes during charge-discharge, while lithium batteries (especially lithium iron phosphate batteries) have a relatively stable voltage platform. When used in mixed parallel connection, charging imbalance and overcharging can easily occur, leading to heat accumulation and battery expansion, and even fire and explosion.
• Compatibility and safety assurance of wireless stack technology: Outdoor power systems supporting wireless stack technology have good battery type identification and compatibility management functions. The system can automatically identify the types of batteries connected in parallel and adjust the charging strategy according to the battery characteristics. In a test of a mixed connection system containing lead-acid batteries and lithium batteries, wireless stack technology successfully identified the different battery types, issued an alarm to alert users of compatibility issues, and automatically cut off the charging circuit, effectively avoiding potential safety accidents.

Wireless stack technology plays a key role in outdoor power parallel intelligent management. It achieves high-precision voltage synchronization through CAN bus communication, effectively suppresses circulating current caused by sudden loads, and works with the active voltage balancing circuit of lithium iron phosphate battery cells and intelligent recognition and processing of extreme situations. This greatly improves the safety and reliability of outdoor power parallel use. When selecting an outdoor power parallel solution, products with advanced wireless stack technology should be given priority to ensure the safety and stability of outdoor power use.