Vehicle peak power energy storage system based on diode isolation and sodium electric compensation

By combining sodium batteries with a DC-DC converter and diode isolation technology, the monitoring unit monitors the vehicle's power demand. When the demand is at its peak, the sodium battery is replenished with power through the DC-DC converter, which solves the problem of accelerated aging of vehicle lithium batteries under peak power and realizes a high-efficiency, safe and low-cost vehicle peak power energy storage system.

CN224796785UActive Publication Date: 2026-09-25HEFEI CHANGHE ENERGY TECH CO LTD
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Patent Information

Application Number
CN202522472443.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-21
Publication Date
2026-09-25
Estimated Expiration
2035-11-21

AI Technical Summary

Technical Problem

Vehicle lithium batteries age rapidly under peak power demands, leading to poor driving experience and safety hazards. Furthermore, high-rate power lithium batteries are expensive and have stringent thermal management requirements.

Method used

The system employs a sodium battery and a DC-DC converter combined with diode isolation technology. The monitoring unit monitors the vehicle's power demand. During peak demand, the sodium battery is replenished with power through the DC-DC converter, while the lithium battery operates under normal demand, avoiding circulating current and achieving coordinated power supply from the sodium and lithium batteries.

Benefits of technology

It effectively meets the peak power requirements of vehicles, extends lithium battery life, reduces system costs, improves driving experience and safety, avoids circulating current, and achieves efficient and energy-saving operation.

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Abstract

The utility model relates to vehicle peak power energy storage technical field, and disclose vehicle peak power energy storage system based on diode isolation and sodium electricity compensation, include: sodium battery, DC-DC converter, monitoring unit, DC bus, D1 diode and D2 diode, sodium battery links with DC-DC converter, DC-DC converter connects monitoring unit, DC-DC converter and sodium battery all are connected with DC bus, D1 diode is located between sodium battery and DC bus, D2 diode is located between DC-DC converter and DC bus, monitoring unit can perceive vehicle power demand change, cooperates DC-DC converter control, makes sodium battery timely access circuit to supplement lithium battery power output gap, satisfies the peak power demand under the vehicle specific scene, diode can realize sodium battery branch and the effective isolation of relevant circuit, guarantees system operation safety, the mixed passage design formed by diode and DC-DC converter realizes the technical effect of no loop current safety.
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