Movable direct current charger

Abstract

The utility model provides a movable direct-current charger, which relates to the technical field of mobile charging and comprises a charger body, and the charger body is provided with an alternating-current input interface, a direct-current output interface and a storage battery charging interface. The charger body is provided with a plurality of slots, and one high-frequency switching power supply module can be inserted into each slot; during use, alternating current enters the high-frequency switching power supply modules through the alternating current input interface, is converted into direct current and then is output to the storage battery power supply interface and the direct current output interface; four universal wheels are installed at the four corners of the bottom face of the charger body respectively, and a telescopic pull rod is arranged on one side of the charger body. According to the utility model, different numbers of high-frequency modules can be inserted according to actual requirements, and flexible power output is realized. Maintenance and upgrading are facilitated, the adaptability of the device is improved, and the charging requirements in different scenes can be met.

Description

Technical Field

[0001] This utility model relates to the field of mobile charging technology, and in particular to a portable DC charger. Background Technology

[0002] Currently, as DC systems age, upgrades are essential. However, due to limitations in available substation mounting positions, it is often necessary to remove existing cabinets and install new ones in their original locations. Existing technical measures often present significant challenges or are simply impossible to implement when performing safety procedures.

[0003] The following problems exist in the current substation DC system upgrade:

[0004] 1. There are no remaining screen spaces, so new screen spaces can only be created by excavating the ground;

[0005] 2. Removing the existing screen installation is difficult and risky.

[0006] 3. Backup power supplies are difficult to match with power systems with different loads. Utility Model Content

[0007] To overcome the aforementioned technical problems, this utility model proposes a portable DC charger. The mobile device is equipped with multiple high-frequency modules, each with an output current of 40A, for a total DC output current of up to 120A. This meets the DC load requirements of substations at different voltage levels. The device is equipped with a monitor to control the charger's output voltage and current and to issue relevant alarm signals. The specific technical solution is as follows:

[0008] A portable DC charger includes a charger body with an AC input interface, a DC output interface, and a battery charging interface. The charger body has multiple slots, each capable of holding a high-frequency switching power supply module. These modules are connected in parallel. In use, AC power enters the high-frequency switching power supply module through the AC input interface, is converted to DC power, and then output to the battery charging interface and the DC output interface. Four casters are mounted at the four corners of the charger body's bottom surface, and a telescopic rod is located on one side of the charger body.

[0009] Furthermore, the portable DC charger also includes a monitor, which includes a display screen and a monitoring circuit. The display screen is located on the charger body, and the monitoring circuit includes a microcontroller unit, a data acquisition unit, and a power supply unit. The data acquisition unit is connected to the microcontroller unit, the microcontroller unit is connected to the display screen, and the power supply unit is connected to the display screen, the microcontroller unit, and the data acquisition unit.

[0010] Furthermore, the monitor also includes a PWM control unit, which is connected to the microcontroller unit and is used to adjust the output voltage and current of the high-frequency switching power supply module.

[0011] Furthermore, the number of slots is three.

[0012] Furthermore, the AC input interface is a 380V AC power interface.

[0013] Furthermore, the high-frequency switching power supply module outputs a current of 40A.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The portable DC charger provided by this utility model has multiple high-frequency switching power supply module slots on its main body. Users can insert different numbers of high-frequency modules according to their actual needs to achieve flexible power output. This design not only facilitates maintenance and upgrades but also improves the adaptability of the device, enabling it to meet charging needs in different scenarios.

[0016] By installing omnidirectional wheels at the bottom of the charger body and designing a telescopic rod on one side, this invention possesses excellent mobility, allowing for easy movement between different locations. It is particularly suitable for environments requiring flexible movement, such as temporary charging stations and outdoor construction sites, greatly improving the ease of use of the device.

[0017] The monitor uses a data acquisition unit to monitor key points of the system (AC input, high-frequency module output, battery interface) in real time, ensuring the safety and stability of the device under different operating conditions. When abnormal conditions such as overvoltage, overcurrent, or overtemperature occur, the system can automatically activate protection mechanisms to effectively prevent device damage or safety hazards.

[0018] This invention employs a microcontroller unit and a PWM control unit, which can automatically adjust the output voltage and current of the high-frequency module according to changes in the actual load, ensuring that the system operates in optimal condition. This intelligent control design improves the system's energy efficiency, reduces unnecessary energy waste, and extends the device's service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the charger body of this utility model;

[0021] Figure 3 This is a schematic diagram of the high-frequency power supply module and slot of this utility model;

[0022] Figure 4 This is a schematic diagram of the present invention;

[0023] Figure 5 This is a schematic diagram of the monitor of this utility model.

[0024] The attached diagram is labeled as follows: 1. Charger body; 2. Slot; 3. High-frequency switching power supply module; 5. Caster wheel; 6. Telescopic rod; 7. Display screen. Detailed Implementation

[0025] The following will describe the technology of the embodiments of the present utility model clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0026] Example 1:

[0027] A portable DC charger includes a charger body 1, which has an AC input interface, a DC output interface, and a battery charging interface. The charger body has multiple slots 2, each of which can accommodate a high-frequency switching power supply module 3. The multiple high-frequency switching power supply modules 3 are connected in parallel. In use, AC power enters the high-frequency switching power supply module 3 through the AC input interface, is converted into DC power, and then output to the battery power interface and the DC output interface. Four casters 5 are installed at the four corners of the bottom surface of the charger body 1, and a telescopic rod 6 is provided on one side of the charger body 1.

[0028] Specifically, the portable DC charger also includes a monitor, which includes a display screen 7 and a monitoring circuit. The display screen 7 is mounted on the charger body 1. The monitoring circuit includes a microcontroller unit, a data acquisition unit, and a power supply unit. The data acquisition unit is connected to the microcontroller unit, the microcontroller unit is connected to the display screen, and the power supply unit is connected to the display screen, the microcontroller unit, and the data acquisition unit.

[0029] Specifically, the monitor also includes a PWM control unit, which is connected to the microcontroller unit and is used to adjust the output voltage and current of the high-frequency switching power supply module.

[0030] Specifically, there are three slots 2.

[0031] Specifically, the AC input interface is a 380V AC power interface.

[0032] Specifically, the output current of the high-frequency switching power supply module 3 is 40A.

[0033] The working principle of this embodiment:

[0034] Reference Figure 3 , Figure 4 The device connects to a 380V AC power supply via an AC input interface. After filtering and rectification, the power is supplied to the internal high-frequency switching power supply module 3. The charger body 1 has three slots 2, each capable of housing one high-frequency switching power supply module 3. These modules are connected in parallel to convert AC power to DC power, with each module outputting 40A. The parallel-connected DC power is then stably output to the battery interface and the DC output interface. The battery interface powers the battery pack, while the DC output interface provides DC power to the DC cabinets of other devices.

[0035] Reference Figure 4 , Figure 5 The device is also equipped with a monitor that can collect key data such as voltage and current at the AC input terminal, the output terminal of the high-frequency switching power supply module 3, and the battery interface in real time. This data is transmitted to the microcontroller for analysis and processing, thereby dynamically adjusting the output of the high-frequency module to ensure stable system operation. The device's operating status is displayed in real time on the display screen 7, allowing users to intuitively understand current voltage, current, temperature, and other information. In case of abnormal conditions such as overvoltage, overcurrent, or overtemperature, the system will automatically activate the protection mechanism, reducing or cutting off the module output to ensure the safety of the device and the load.

[0036] The monitor also includes a PWM control unit, which is responsible for adjusting the operating status of the high-frequency module. By collecting real-time data such as voltage, current, and temperature from the monitor, the microcontroller dynamically adjusts the duty cycle of the PWM signal, thereby precisely controlling the output voltage and current of the high-frequency module and ensuring the stability and efficiency of the system operation.

[0037] To facilitate movement between different locations, the device is equipped with four omnidirectional wheels 5 at the bottom and a telescopic pull rod 6 on one side for easy pushing, pulling, and transportation. The modular design allows users to insert one to three high-frequency modules according to actual needs, thus flexibly adjusting the output power to adapt to various usage scenarios. The entire system integrates flexibility, intelligent monitoring, and portability, providing an efficient solution for substation upgrades, temporary charging stations, and other applications.

Claims

1. A portable DC charger, characterized in that, The device includes a charger body, which has an AC input interface, a DC output interface, and a battery charging interface. The charger body has multiple slots, each capable of holding a high-frequency switching power supply module. These modules are connected in parallel. In use, AC power enters the high-frequency switching power supply module through the AC input interface, is converted to DC power, and then output to the battery power interface and the DC output interface. Four casters are mounted at the four corners of the charger body's bottom surface, and a telescopic rod is located on one side of the charger body.

2. A portable DC charger according to claim 1, characterized in that, It also includes a monitor, which includes a display screen and a monitoring circuit. The display screen is located on the charger body. The monitoring circuit includes a microcontroller unit, a data acquisition unit, and a power supply unit. The data acquisition unit is connected to the microcontroller unit, the microcontroller unit is connected to the display screen, and the power supply unit is connected to the display screen, the microcontroller unit, and the data acquisition unit.

3. A portable DC charger according to claim 2, characterized in that, The monitor also includes a PWM control unit, which is connected to a microcontroller unit and is used to adjust the output voltage and current of the high-frequency switching power supply module.

4. A portable DC charger according to any one of claims 1 to 3, characterized in that, There are three slots.

5. A portable DC charger according to claim 1, characterized in that, The AC input interface is a 380V AC power interface.

6. A portable DC charger according to claim 4, characterized in that, The high-frequency switching power supply module outputs a current of 40A.

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