Mobile power supply compatible with 220V single-phase output and 380V three-phase output

Abstract

A mobile power supply compatible with 220V single-phase output and 380V three-phase output belongs to the technical field of mobile power supply equipment, and comprises an installation structural member, a battery pack, a single-phase converter and a frequency converter, 220V single-phase alternating current obtained by conversion of the battery pack is divided into two paths, one path is directly output, the other path is output to the frequency converter, 380V three-phase alternating current is output through the frequency converter, and the single-phase converter is connected with the frequency converter. The performance characteristic that the maximum output power of 220V single-phase alternating current and the maximum output power of 380V three-phase alternating current are approximately equal is achieved, and the use requirement is met; in addition, when the total output power of the mobile power supply exceeds the currently allowed maximum power, the converter can give out an early warning to prevent damage; and finally, the mobile power supply box body is provided with wheels and a handle, is convenient to carry, and can be deployed and transferred in application scenes such as a construction site and a construction site.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile power supply equipment, and in particular to a mobile power supply compatible with 220V single-phase output and 380V three-phase output. Background Art

[0002] In traditional solutions, portable mobile power supplies with 220V single-phase AC and 380V three-phase AC output capabilities usually adopt the following power conversion mode: the battery outputs DC power, which is then converted into 380V three-phase AC power through a three-phase four-wire converter, and then one phase and the neutral line are used as 220V AC output.

[0003] Based on the above-mentioned power conversion mode, the maximum power of the 220V single-phase AC output of the traditional portable mobile power supply is only one-third of the maximum power of the 380V three-phase AC. It is impossible to achieve the same maximum output power of 220V single-phase AC and 380V three-phase AC, and cannot meet the power demand of the same maximum output power of 220V and 380V. Summary of the Invention

[0004] In order to solve the problem that traditional portable mobile power supplies cannot meet the power demand of 220V and 380V with the same maximum output power, the present invention provides a mobile power supply compatible with 220V single-phase output and 380V three-phase output.

[0005] A mobile power supply compatible with 220V single-phase output and 380V three-phase output, the improvement being that the mobile power supply comprises: a mounting structure, a battery pack, a single-phase converter, and a frequency converter; the battery pack, single-phase converter, and frequency converter are mounted on the mounting bracket; the battery pack is electrically connected to the input of the single-phase converter to transmit direct current and battery charge information to the single-phase converter; the output of the single-phase converter outputs 200V alternating current to the outside through the mounting structure; the output of the single-phase converter is connected in parallel to the input of the frequency converter, and the frequency converter converts the 200V alternating current from the single-phase converter into 380V three-phase alternating current, and outputs it externally through the mounting structure.

[0006] Preferably, the mounting structure includes: a box, a 220V single-phase output interface and a 380V three-phase output interface; the battery pack, single-phase inverter and frequency converter are arranged in the box, and the output end of the single-phase inverter supplies power to the outside through the 220V single-phase output interface; the output end of the frequency converter supplies power to the outside through the 380V three-phase output interface.

[0007] Preferably, the mounting structure further includes: a 220V charging interface; the 220V charging interface is arranged on the box body, the 220V charging interface is connected to the single-phase converter, and the battery pack is charged through the single-phase converter.

[0008] Preferably, the mounting structure also includes: a display screen and a buzzer; the buzzer and the display screen are arranged on the box and are communicatively connected to the single-phase inverter. When the total output power of the single-phase inverter and the frequency converter is greater than the output upper limit value of the single-phase inverter, the buzzer emits a buzzer alarm; the display screen displays the battery charge information of the battery pack.

[0009] Preferably, the mounting structure further includes: wheels, a pull rod and a handle; the wheels are arranged at the bottom of the box; the pull rod and the handle are arranged opposite to each other on the outer side wall of the box.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The technical solution provided by the present invention includes: mounting structural parts, battery packs, single-phase converters and frequency converters. The present invention divides the 220V single-phase AC power converted by the battery pack into two paths, one for direct output and the other for outputting the frequency converter, and outputs 380V three-phase AC power through the frequency converter, thereby achieving the performance characteristics of approximately equal maximum output power of 220V single-phase AC power and 380V three-phase AC power, meeting the use requirements; in addition, when the total output power of the mobile power supply exceeds the currently allowed maximum power, the converter can issue an early warning to prevent damage; finally, the mobile power supply box has wheels and a handle, which is easy to carry and can be deployed and transferred in application scenarios such as construction sites and construction sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram A of the structure of the mobile power supply of the present invention;

[0013] Figure 2 Schematic diagram B of the structure of the mobile power supply of the present invention;

[0014] Figure 3 Schematic diagram of the electrical conversion of the mobile power supply in the present invention;

[0015] Among them, 1-battery pack; 2-single-phase converter; 3-frequency converter; 4-cabinet; 5-220V single-phase output interface; 6-380V three-phase output interface; 7-220V charging interface; 8-display screen; 9-wheels; 10-handle. DETAILED DESCRIPTION

[0016] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and examples.

[0017] Example 1

[0018] This embodiment provides a mobile power supply compatible with 220V single-phase output and 380V three-phase output. The structural diagram of the mobile power supply is shown in FIG. Figure 1 and Figure 2 As shown, it includes: a mounting structure, a battery pack 1, a single-phase converter 2 and a frequency converter 3; the battery pack 1, the single-phase converter 2 and the frequency converter 3 are mounted on the mounting bracket; the battery pack 1 is electrically connected to the input end of the single-phase converter 2, and transmits direct current and battery charge information to the single-phase converter 2; the output end of the single-phase converter 2 outputs 200V AC to the outside through the mounting structure; the output end of the single-phase converter 2 is connected in parallel to the input end of the frequency converter 3, and the frequency converter 3 converts the 200V AC from the single-phase converter 2 into 380V three-phase AC, and outputs it to the outside through the interface set on the outside of the mounting structure. In this embodiment, the working mode of the frequency converter is set to one input and three outputs, and its output ends U, V, and W are used as the outputs L1, L2, and L3 of 380V three-phase AC. The schematic diagram of the electrical conversion inside the mobile power supply is shown in FIG. Figure 3 shown.

[0019] The output power of 380V three-phase AC power is equal to the product of the output power of 220V single-phase AC power and the operating efficiency of the inverter. The efficiency of the inverter is generally around 95%. Therefore, the mobile power supply provided by the present invention can achieve performance characteristics that are approximately equal in maximum output power between 220V single-phase AC power and 380V three-phase AC power. However, the maximum output power of 220V single-phase AC power of traditional solutions is only one-third of the maximum power of 380V three-phase AC power, and it is impossible to achieve the same maximum output power between 220V single-phase AC and 380V three-phase AC.

[0020] The mounting structure includes: a box 4, a 220V single-phase output interface 5 and a 380V three-phase output interface 6; the battery pack 1, the single-phase converter 2 and the frequency converter 3 are arranged in the box 4, and the output end of the single-phase converter 2 supplies power to the outside through the 220V single-phase output interface 5; the output end of the frequency converter 3 supplies power to the outside through the 380V three-phase output interface 6.

[0021] The mounting structure further includes a 220V charging interface 7 ; the 220V charging interface 7 is provided on the box body 4 , and the 220V charging interface 7 is connected to the single-phase converter 2 , and charges the battery pack 1 through the single-phase converter 2 . In this embodiment, the number of the 220V charging interfaces 7 provided is two.

[0022] The mounting structure further includes a display screen 8 and a buzzer. The buzzer and display screen 8 are mounted on the housing 4 and are in communication with the single-phase inverter 2. When the total output power of the single-phase inverter 2 and the frequency converter 3 exceeds the output upper limit of the single-phase inverter 2, the buzzer sounds an alarm. The display screen 8 displays the battery charge information of the battery pack 1. The 220V single-phase inverter outputs the status information of the battery pack 1 to the display screen 8 and the buzzer, and limits the maximum output power to the minimum value of the battery pack 1's current allowable discharge power compared to the rated maximum output power.

[0023] When both 220V single-phase AC power and 380V three-phase AC power are connected to loads, if the total power of the two exceeds the maximum power currently allowed by the 220V single-phase converter, the single-phase converter 2 can issue an alarm and then cut off the output, thereby protecting the safety of the mobile power supply.

[0024] The status information of the battery pack 1 includes: battery voltage, battery capacity, SOC, SOH, current power, current allowed charging power, current allowed discharging power, alarm status, etc.

[0025] In this embodiment, the allowable discharge power of the battery pack 1 can be set.

[0026] The mounting structure further includes: wheels 9, a pull rod and a handle 10; the wheels 10 are arranged at the bottom of the box body 4; the pull rod and the handle are arranged opposite to each other on the outer side wall of the box body 4.

[0027] In this embodiment, the inverter 3 can also utilize its variable voltage and frequency characteristics to adapt to the starting characteristics of the load motor, improve the torque of the motor, and be more suitable for application scenarios such as construction sites.

[0028] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A mobile power supply compatible with 220V single-phase output and 380V three-phase output, characterized in that: The mobile power source comprises: a mounting structure, a battery pack (1), a single-phase converter (2) and a frequency converter (3); The battery pack (1), the single-phase converter (2) and the frequency converter (3) are mounted on the mounting bracket; the battery pack (1) is electrically connected to the input end of the single-phase converter (2) to transmit direct current and battery charge information to the single-phase converter (2); the output end of the single-phase converter (2) outputs 200V alternating current to the outside through the mounting structure; the output end of the single-phase converter (2) is connected in parallel to the input end of the frequency converter (3), and the frequency converter (3) converts the 200V alternating current from the single-phase converter (2) into 380V three-phase alternating current, and outputs it to the outside through the mounting structure.

2. A mobile power source compatible with 220V single-phase output and 380V three-phase output as claimed in claim 1, characterized in that: The installation structure comprises: a box body (4), a 220V single-phase output interface (5) and a 380V three-phase output interface (6); The battery pack (1), the single-phase converter (2) and the frequency converter (3) are arranged in the box (4); the output end of the single-phase converter (2) supplies power to the outside through the 220V single-phase output interface (5); and the output end of the frequency converter (3) supplies power to the outside through the 380V three-phase output interface (6).

3. A mobile power source compatible with 220V single-phase output and 380V three-phase output as claimed in claim 2, characterized in that: The mounting structure also includes: a 220V charging interface (7); The 220V charging interface (7) is arranged on the box body (4), and the 220V charging interface (7) is connected to the single-phase converter (2), and the battery pack (1) is charged via the single-phase converter (2).

4. A mobile power source compatible with 220V single-phase output and 380V three-phase output as claimed in claim 2, characterized in that: The mounting structure also includes: a display screen (8) and a buzzer; The buzzer and the display screen (8) are arranged on the box (4) and are connected to the single-phase converter (2) for communication. When the total power output by the single-phase converter (2) and the frequency converter (3) is greater than the output upper limit of the single-phase converter (2), the buzzer emits a buzzer alarm; and the display screen (8) displays the battery charge information of the battery pack (1).

5. A mobile power source compatible with 220V single-phase output and 380V three-phase output as claimed in claim 2, characterized in that: The mounting structure also includes: wheels (9), a pull rod and a handle (10); The wheel (10) is arranged at the bottom of the box body (4); the pull rod and the handle are arranged opposite to each other on the outer side wall of the box body (4).

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