CN220752205U - Energy storage load device for AC endurance test of overcurrent protection device - Google Patents
Energy storage load device for AC endurance test of overcurrent protection device Download PDFInfo
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- CN220752205U CN220752205U CN202321551763.6U CN202321551763U CN220752205U CN 220752205 U CN220752205 U CN 220752205U CN 202321551763 U CN202321551763 U CN 202321551763U CN 220752205 U CN220752205 U CN 220752205U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 75
- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 238000007599 discharging Methods 0.000 claims description 2
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- 238000011084 recovery Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
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- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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Abstract
The utility model discloses energy storage load equipment for AC endurance test of an overcurrent protection device, which is connected with the overcurrent protection device and an AC power supply to form a test loop; the energy storage load device comprises an AC-DC converter, a first DC-DC converter, an energy storage battery pack and a battery management system; when the alternating-current endurance test of the overcurrent protection device is executed, alternating current output by the alternating-current power supply is input into energy storage load equipment through the overcurrent protection device, and the energy storage battery pack is charged after passing through the AC-DC converter and the first DC-DC converter; when the endurance test is carried out, the energy storage battery pack is enabled to enter a charging state, a virtual load of the alternating current endurance test of the overcurrent protection device is formed, and energy recovery is carried out. The energy storage load device can replace the traditional load-power resistor in the alternating-current endurance test of the overcurrent protection device, and realize energy recycling.
Description
Technical Field
The utility model relates to the field of endurance test of fuses, in particular to energy storage load equipment for AC endurance test of an overcurrent protection device.
Background
In the research, development and production test of current overcurrent protection devices such as fuses and fuses, a constant current power supply or a constant voltage power supply is generally used for applying constant current or constant voltage to a tested product, current adjustment is carried out by matching with a load resistor, and then endurance test is carried out (as shown in fig. 1). The fuse has a plurality of types, the rated current of the melt in the fuse is different from a few A to hundreds A, and the rated current of the fuse is generally different from a few tens mA to tens A. When the endurance test of the fuse and the heavy-current fuse is carried out, the power is wasted on the load power resistor (the electric energy is converted into heat energy) arranged in the equipment and arranged outside the equipment, so that the energy waste is caused, and meanwhile, the endurance test increases the energy cost of a company; and the body heating of the load power resistor is continuously increased along with the increase of time by using the load power resistor, the stability of the load power resistor is reduced, the cracking and burning caused by the body heating are easy to occur, and the potential safety hazard is easy to cause.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide an energy storage load device for ac endurance test of an over-current protection device, which can perform energy recovery during the ac endurance test of the over-current protection device, so as to reduce the energy cost of a company.
In order to achieve the above purpose, the utility model provides an energy storage load device for an alternating current endurance test of an overcurrent protection device, wherein the energy storage load device is connected with the overcurrent protection device and an alternating current power supply to form a test loop; the energy storage load device comprises an AC-DC converter, a first DC-DC converter, an energy storage battery pack and a battery management system; an alternating current input end of the AC-DC converter is connected with an output end of an alternating current power supply through an overcurrent protection device, and the other alternating current input end of the AC-DC converter is connected with the other output end of the alternating current power supply; two direct current output ends of the AC-DC converter are connected with two input ends of the first DC-DC converter; the two output ends of the first DC-DC converter are connected with the positive electrode and the negative electrode of the energy storage battery pack; the battery management system is connected with the first DC-DC converter and the energy storage battery pack, and enables the energy storage battery pack to enter a charging state when the endurance test is carried out, so that a virtual load for the alternating current endurance test of the overcurrent protection device is formed.
Further, the overcurrent protection device is a fuse or a fuse.
Further, the AC-DC converter is a rectifying and filtering module.
Further, the AC-DC converter is an AC-DC switching power supply module.
Further, the first DC-DC converter is a direct current step-up and step-down circuit, and the output voltage of the first DC-DC converter is 1V-3V higher than the rated voltage of the energy storage battery pack.
Further, the rated voltage of the energy storage battery pack is one of 24V, 48V, 96V or 192V.
Further, the energy storage load device further comprises a second DC-DC converter and an inverter; two input ends of the second DC-DC converter are connected with the positive electrode and the negative electrode of the energy storage battery pack, and two output ends of the second DC-DC converter are connected with two direct current input ends of the inverter; the two alternating current output ends of the inverter are connected with electric equipment or a power grid; the battery management system is connected with the second DC-DC converter and the inverter and used for discharging control of the energy storage battery pack.
The utility model realizes the following technical effects:
according to the energy storage load device, the virtual load is provided in a mode of charging the energy storage battery pack, the matching of the test voltage and the voltage of the energy storage battery pack is realized through DC-DC conversion, and the size of the virtual load can be conveniently adjusted by controlling the charging current, so that the replacement of a traditional load-power resistor is realized, the electric energy consumed in the power load resistor is converted into chemical energy to be stored in the energy storage battery pack, and the energy recovery and the reutilization are realized.
Drawings
FIG. 1 is a functional block diagram of a prior art AC fuse, fuse endurance test system;
fig. 2 is a functional block diagram of the ac fuse and fuse endurance test system according to the present utility model.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The utility model will now be further described with reference to the drawings and detailed description.
As shown in fig. 2, the present utility model provides an energy storage load device for AC endurance test of an overcurrent protection device, where the energy storage load device 3 includes an AC-DC converter 36, a DC-DC converter 31, an energy storage battery pack 32, a DC-DC converter 33, an inverter 34, a battery management system 35, and other components.
The battery management system 35 is connected with the modules such as the DC-DC converter 31, the energy storage battery pack 32, the DC-DC converter 33, the inverter 34 and the like, collects parameters such as working current and working voltage of each module, and cooperates with each working module to control the normal operation of each working module.
In this application, the object to be subjected to the endurance test is an overcurrent protection device such as a fuse or a fuse for an ac current.
In this application, the test power supply 1 is an ac power supply, and provides a constant voltage output or a constant current output. Because the protection currents of the overcurrent protection devices 2 are different (for example, the rated current of the melt in the fuse is several A to several hundred A, the rated current of the fuse is several tens mA to several tens A, etc.), the input voltage and the input current of the test power supply 1 from the various overcurrent protection devices 2 and the AC-DC converter 36 to the input end of the DC-DC converter 31 can fluctuate in a large range, and the input voltage can be matched with the charging voltage of the energy storage battery pack 32 after the input voltage is required to be converted by the DC-DC converter 31.
In this application, the AC-DC converter 36 may employ a simple bridge rectifier filter circuit consisting of a bridge rectifier and filter capacitors. The module can select bridge stacks and filter capacitors with different specifications to provide AC/DC conversion matching according to the protection current interval of the overcurrent protection device 2. The AC-DC converter 36 may also employ a modular AC-DC switching power module to convert the AC power output by the overcurrent protection device 2 to DC power.
In this application, the DC-DC converter 31 provides a constant voltage output to step down or step up the input voltage to a voltage that matches the charging voltage of the energy storage battery pack 32, thereby effectively charging the energy storage battery pack 2 and achieving energy recovery. Preferably, the output voltage of the DC-DC converter 31 is 1V-3V higher than the rated voltage of the energy storage battery pack 2.
Preferably, the voltage rating of the energy storage battery pack 32 is 24V, 48V, 96V or 192V.
The energy storage battery pack 32 provides an input impedance corresponding to the power load resistance in a conventional circuit, also referred to as a dummy load, during charging by conversion of the DC-DC converter 31.
During testing, the battery management system 35 can control the charging current of the energy storage battery pack 32 to adjust the magnitude of the virtual load by controlling the output voltage of the DC-DC converter 31 (i.e. the charging voltage of the energy storage battery pack 32), so that the input impedance of the power load resistor is the same as that of the conventional testing scheme, and the durability test of the overcurrent protection device can be performed.
In this embodiment, the energy of the energy storage battery 32 can be converted into the power frequency alternating current again through the DC-DC converter 33 and the inverter 34 for application.
The battery management system 35 may perform charge and discharge management according to the amount of electricity of the energy storage battery pack 32. The management mode is as follows:
1. when the energy storage battery pack 32 is not full (the electric quantity is less than 100%) or the voltage is lower than the set threshold (such as the electric quantity is 90%) during the endurance test, the battery management system 35 will communicate the test power to the charging circuit of the energy storage battery pack 32 through the current protection device 2 and the DC-DC converter 31 to charge the energy storage battery pack 32;
2. when the endurance test is performed, when the energy storage battery pack 32 is full (100% of the electric quantity) or charged to a set threshold (for example, 90% of the electric quantity), the battery management system 35 turns off the DC-DC converter 31, turns on the DC-DC converter 33, turns off the charging loop, directly accesses the test power supply to the DC-DC converter 33, boosts the low-voltage direct current output by the energy storage battery pack 32 into high-voltage direct current, converts the high-voltage direct current into power-frequency alternating current (110V/60 Hz, 220V/50Hz or 380V 50 Hz) through the inverter 34, supplies power to other electric equipment, and uses the electric equipment as a power load resistor to realize energy recycling.
3. When the power of the energy storage battery pack 32 reaches a set threshold (e.g., 20%) while the durability test is not being performed, the energy storage battery pack 32 may be powered externally: the energy storage battery pack 32 boosts low-voltage direct current output by the battery into high-voltage direct current through the DC-DC converter 33, and then converts the high-voltage direct current into power frequency alternating current (110V/60 Hz or 220V/50Hz or 380V 50 Hz) to supply power to other electric equipment or be combined with a power grid through the inverter 34, so that energy recycling is realized.
In the present embodiment, the DC-DC converter 31, the energy storage battery pack 32, the DC-DC converter 33, the inverter 34, and the battery management system 35 may be functional circuits or functional modules of the present energy storage load device, which may be obtained by homemade or purchased. The control of the charge and discharge of the energy storage battery pack 32 by the battery management system 35 is a conventional means for a person skilled in the art and will not be described in detail herein.
According to the energy storage load device, the virtual load is provided in a mode of charging the energy storage battery pack, the matching of the test voltage and the voltage of the energy storage battery pack is realized through DC-DC conversion, and the size of the virtual load can be conveniently adjusted by controlling the charging current, so that the replacement of a traditional load-power resistor is realized, the electric energy consumed in the power load resistor is converted into chemical energy to be stored in the energy storage battery pack, and the energy recovery and the reutilization are realized.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (8)
1. An energy storage load device for AC endurance test of an overcurrent protection device is characterized in that the energy storage load device is connected with the overcurrent protection device and an AC power supply to form a test loop; the energy storage load device comprises an AC-DC converter, a first DC-DC converter, an energy storage battery pack and a battery management system; an alternating current input end of the AC-DC converter is connected with an output end of an alternating current power supply through an overcurrent protection device, and the other alternating current input end of the AC-DC converter is connected with the other output end of the alternating current power supply; two direct current output ends of the AC-DC converter are connected with two input ends of the first DC-DC converter; the two output ends of the first DC-DC converter are connected with the positive electrode and the negative electrode of the energy storage battery pack; the battery management system is connected with the first DC-DC converter and the energy storage battery pack, and enables the energy storage battery pack to enter a charging state when the endurance test is carried out, so that a virtual load for the alternating current endurance test of the overcurrent protection device is formed.
2. The energy storage load device of claim 1, wherein the over-current protection device is a fuse or a fuse.
3. The energy storage load device of claim 1, wherein the AC-DC converter is a rectifying and filtering module.
4. The energy storage load device of claim 1, wherein the AC-DC converter is an AC-DC switching power supply module.
5. The energy storage load device of claim 1, wherein the first DC-DC converter employs a DC boost-buck circuit, and wherein an output voltage of the first DC-DC converter is higher than a rated voltage of the energy storage battery.
6. The energy storage load device of claim 1, wherein the output voltage of the first DC-DC converter is 1V-3V higher than the rated voltage of the energy storage battery.
7. The energy storage load device of claim 1, wherein the voltage rating of the energy storage battery is one of 24V, 48V, 96V, or 192V.
8. The energy storage load device of claim 1, further comprising a second DC-DC converter and an inverter; two input ends of the second DC-DC converter are connected with the positive electrode and the negative electrode of the energy storage battery pack, and two output ends of the second DC-DC converter are connected with two direct current input ends of the inverter; the two alternating current output ends of the inverter are connected with electric equipment or a power grid; the battery management system is connected with the second DC-DC converter and the inverter and used for discharging control of the energy storage battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321551763.6U CN220752205U (en) | 2023-06-16 | 2023-06-16 | Energy storage load device for AC endurance test of overcurrent protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321551763.6U CN220752205U (en) | 2023-06-16 | 2023-06-16 | Energy storage load device for AC endurance test of overcurrent protection device |
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| Publication Number | Publication Date |
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| CN220752205U true CN220752205U (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321551763.6U Active CN220752205U (en) | 2023-06-16 | 2023-06-16 | Energy storage load device for AC endurance test of overcurrent protection device |
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| Country | Link |
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| CN (1) | CN220752205U (en) |
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2023
- 2023-06-16 CN CN202321551763.6U patent/CN220752205U/en active Active
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Effective date of registration: 20240529 Address after: No. 8067, Xiang'an West Road, industrial zone, torch hi tech Zone (Xiang'an), Xiamen City, Fujian Province, 361000 Patentee after: Xiamen Celtic Electronics Co.,Ltd. Country or region after: China Address before: 710053 2nd Floor, Building 10, West Yungu Phase 3, Fengxi New City, Xixian New District, Xi'an City, Shaanxi Province Patentee before: Xi'an Saiertean Electronics Co.,Ltd. Country or region before: China |