Double modular parallel flyback energy balancer for series battery pack and control method thereof

By using a series battery pack double modular parallel flyback energy equalizer in a lithium-ion battery pack, the double energy equalization is achieved by using inductor and flyback transformer equalization modules, which solves the low energy transfer efficiency and equalization in the prior art. The slow speed problem improves the performance and safety of the battery pack.

CN113300430BActive Publication Date: 2025-02-11KUNMING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202110539053.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-05-18
Publication Date
2025-02-11
Estimated Expiration
2041-05-18

AI Technical Summary

Technical Problem

The prior art has problems in lithium-ion battery packs with low energy transfer efficiency, slow equalization speed, and poor control ability of balanced energy, resulting in the impact of battery pack performance and increased safety risks.

Method used

The double modular parallel flyback energy equalizer of series battery pack is adopted, and the platform is built through multiple equalization modules. The inductance equalization module and the flyback transformer equalization module are used to achieve double energy equalization, including when the battery pack is in a static state. The first level is equalized, and the second level is equalized under charging, discharging, and standing states.

Benefits of technology

It achieves fast and efficient energy balance of the battery pack, improves the charging and discharging capacity of the battery pack, extends the service life of the battery pack, and reduces safety risks.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a double modular parallel flyback energy balancer for a series battery pack and a control method thereof, comprising i balancing modules, wherein the i balancing modules are formed by 5i MOSFET switches with anti-parallel diodes, i flyback transformers, and i battery cells connected in series, and the i balancing modules are used to form an inductance balancing module and a flyback transformer balancing module. The present invention uses an inductance balancing module to perform the first balancing in a static state, wherein the circuit structure of the inductance balancing module is simple and each module is independent of each other, and each inductance balancing module works simultaneously during balancing, and the balancing speed is fast, and the device is easy to control and implement; the second balancing is implemented by using a flyback transformer balancing module, wherein the topological circuit principle of the balancing is simple, the control capability of the balancing current is strong, the balancing energy transfer efficiency is high, and each flyback transformer balancing module is independent of each other, and each flyback transformer balancing module works simultaneously during balancing, and the balancing speed is fast.
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Citation Information

Patent Citations

  • Series battery equalizing equipment

    CN101741122A

  • Flyback circuit-based battery pack lossless balance circuit

    CN107342442A