Device for adjusting output voltage of totem pole PFC (Power Factor Correction) through battery state

Abstract

The utility model relates to the technical field of switching power supplies, and discloses a device for adjusting the output voltage of a totem-pole PFC (Power Factor Correction) through a battery state, which comprises a BMS (Battery Management System), a totem-type PFC power supply module, a digital control module and a voltage sampling module. According to the utility model, the totem-type PFC power supply module adopts an advanced input filter design, and is combined with the totem-pole output pole TPOS and the totem-type PFC, so that compared with a traditional APFC structure, lower conduction loss and higher energy density are realized, full-digital management is carried out on the power supply module through the digital control module, and the power supply efficiency is improved. The stability and controllability of the charging process are ensured, so that the charging strategy can be automatically adjusted according to different stages of the battery in the charging process; and it is ensured that the battery can obtain the most suitable charging condition in each charging stage. Therefore, the service life of the battery can be prolonged, and the charging efficiency can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supplies, and more particularly to a device for adjusting the output voltage of a totem pole PFC according to a battery state. Background Art

[0002] The birth of this technology stems from the urgent need for modern energy storage devices to achieve higher charging efficiency and speed. However, its widespread adoption presents a challenge: traditional charger systems are no longer designed to meet increasingly complex charging requirements. These issues often include poor energy conversion efficiency, insufficient control accuracy, and limited applicability, all of which severely impact the performance and service life of energy storage devices.

[0003] In response to this trend, the industry has engaged in in-depth technological research and development, as well as innovative exploration, to enhance the efficiency, digitization, and intelligence of charger systems. This technology was developed within this context, aiming to comprehensively optimize the charging process through high-tech means, ensuring more efficient energy transfer, a more controllable charging process, and adaptability to a wide range of energy storage devices. The development of this technology not only reflects the urgent need for improved supporting charging technologies in the energy storage device sector, but also marks a key step towards higher performance and wider applicability of charger systems. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a device for adjusting the output voltage of a totem pole PFC according to the battery status, which has the advantage of reducing the adverse effects of the device on the power grid.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for adjusting the output voltage of a totem pole PFC according to the battery status, comprising: a BMS, a totem-type PFC power supply module, a digital control module and a voltage sampling module;

[0006] The totem PFC power supply module adopts an input filter circuit, a totem pole output pole TPOS and a totem PFC;

[0007] The core of the digital control module is the microcontroller unit MCU.

[0008] As a preferred technical solution of the present invention, the BMS is used to monitor the status of the battery, and the BMS transmits voltage and current sampling information to the microcontroller unit MCU through a data packet.

[0009] As a preferred technical solution of the present invention, the digital control module performs full digital management of the totem-type PFC power supply module and regulates and monitors the charging process through the microcontroller unit MCU.

[0010] As a preferred technical solution of the present invention, the totem-type PFC power supply module outputs a variable DC voltage range through output voltage and current feedback.

[0011] As a preferred technical solution of the present invention, the voltage sampling module is used to implement voltage sampling.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. This utility model adopts an advanced input filter design through a totem-type PFC power supply module, combined with a totem-pole output pole TPOS and a totem-type power factor correction PFC, to achieve lower conduction losses and higher energy density compared to the traditional APFC structure.

[0014] 2. This utility model uses a digital control module to fully digitally manage the power module, ensuring the stability and controllability of the charging process. This allows the module to automatically adjust the charging strategy based on the battery's different charging stages, ensuring the battery receives the most suitable charging conditions at each charging stage. This not only helps extend the battery's lifespan but also significantly improves charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of a specific control method of the present utility model;

[0017] Figure 3 This is a partial structural diagram of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figures 1 to 3 As shown, the utility model provides a device for adjusting the output voltage of a totem pole PFC according to the battery status, comprising: a BMS, a totem-type PFC power supply module, a digital control module and a voltage sampling module;

[0020] The totem PFC power supply module adopts input filter circuit, totem pole output pole TPOS and totem PFC;

[0021] The core of the digital control module is the microcontroller unit MCU.

[0022] The voltage and current signals collected by the battery management system BMS are processed, and a duty cycle signal is sent to the power factor adjustment circuit PFC switching components. By controlling the on and off of the power switch tube, the output voltage of the totem PFC is dynamically adjusted in real time, thereby allowing the half-bridge LLC to operate in a resonant state.

[0023] The device is suitable for devices such as lithium batteries whose intrinsic characteristics are related to the charging stage. Through the coordination of software and hardware, it can achieve precise output control to meet the charging needs of different application scenarios.

[0024] Power output is achieved through full digital control, and the output voltage of PFC can be automatically adjusted according to the charging scenario or charging stage;

[0025] This fully digital control method not only greatly enhances the flexibility of system configuration, but also can accurately adjust and monitor the charging process, adapting to changing charging needs and conditions in real time.

[0026] This device system has achieved remarkable results in improving energy conversion efficiency, optimizing control accuracy, and enhancing system applicability. It provides solid technical support for efficient and safe charging of energy storage devices such as electric motorcycles and lithium batteries at different charging stages.

[0027] By simplifying the circuit structure and improving conversion efficiency, high energy efficiency standards are met, the heating problem of traditional PFC circuits is solved, and the control performance is optimized; through output voltage and current feedback, the totem PFC output can have a variable DC voltage range; these advantages make them play a key role in improving the efficiency, stability and reliability of power supply systems.

[0028] Among them, BMS is used to monitor the status of the battery, and BMS transmits voltage and current sampling information to the microcontroller unit MCU through data packets.

[0029] Digital control MCUs provide precise control capabilities in power systems, achieving a high degree of flexibility and adaptability through software programming. Their high level of integration reduces the number of external components and shrinks system size, while their digital characteristics enhance system reliability and stability, making them an ideal choice for achieving efficient, flexible, and reliable power control.

[0030] Among them, the digital control module performs full digital management of the totem PFC power supply module and regulates and monitors the charging process through the microcontroller unit MCU.

[0031] The totem-style power factor correction (PFC) circuit achieves high-efficiency energy conversion and reduces energy loss. Furthermore, the use of a digital control module (MCU) for full digital control provides precise charging control and flexible strategy adjustment.

[0032] Among them, the totem-type PFC power supply module outputs a variable DC voltage range through output voltage and current feedback.

[0033] The Totem PFC (Power Factor Correction) and MCU control unit combine to create a design that not only saves costs but also significantly improves energy conversion efficiency. Specifically, Totem PFC technology effectively reduces the harmonic content of the input current and improves the power factor.

[0034] Among them, the voltage sampling module is used to implement voltage sampling.

[0035] The device has an output power of 2000W. By monitoring the battery status through the BMS and transmitting the voltage and current sampling information to the MCU (microcontroller unit) through data packets, it achieves precise control of the power output; the charging process is stepped and staged using the charging status control program to optimize charging efficiency.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for adjusting the output voltage of a totem pole PFC according to the battery status, characterized in that: Includes: BMS, totem PFC power supply module, digital control module and voltage sampling module; The totem PFC power supply module adopts an input filter circuit, a totem pole output pole TPOS and a totem PFC; The core of the digital control module is the microcontroller unit MCU.

2. The device for adjusting the output voltage of a totem pole PFC according to battery status according to claim 1, characterized in that: The BMS is used to monitor the status of the battery, and the BMS transmits voltage and current sampling information to the microcontroller unit MCU through a data packet.

3. The device for adjusting the output voltage of a totem pole PFC according to a battery state according to claim 1, characterized in that: The digital control module performs full digital management of the totem-type PFC power supply module and regulates and monitors the charging process through the microcontroller unit MCU.

4. The device for adjusting the output voltage of a totem pole PFC according to a battery state according to claim 1, wherein: The totem-type PFC power supply module outputs a variable DC voltage range through output voltage and current feedback.

5. The device for adjusting the output voltage of a totem pole PFC according to a battery state according to claim 1, characterized in that: The voltage sampling module is used to implement voltage sampling.

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