Box body structure integrating high and low voltage current input and output

Abstract

The utility model relates to the field of electrical test equipment, in particular to a box body structure integrating high-low voltage current input and output, which comprises a box body, an upper cover arranged at the top of the box body, a low-voltage wire inlet hole and a high-voltage wire inlet hole arranged at one end of the box body, and a wire outlet hole arranged at the other opposite end of the box body. The partition plate is vertically arranged in the box body; the insulation cushion blocks are arranged on the inner wall of the bottom of the box body, the two insulation cushion blocks are located on the two sides of the partition plate respectively, a low-voltage input device and a high-voltage input mechanism are arranged on the two insulation cushion blocks respectively, and the low-voltage input device and the high-voltage input mechanism provide a low-voltage power source and a high-voltage power source for BOP performance testing respectively. According to the utility model, the internal insulation cushion block is made of the bakelite material, the threads can be freely processed to achieve the purpose of free assembly, the insulation performance is excellent, and the leakage risk in the whole current flowing process can be avoided. And the partition plate is arranged to separate high-voltage and low-voltage power supplies, so that mutual electromagnetic interference is avoided.

Description

Technical Field

[0001] The utility model relates to the field of electrical testing equipment, in particular to a box body structure integrating high and low voltage current input and output. Background Art

[0002] The hydrogen fuel cell system has the advantages of zero emissions and fast hydrogen refueling, and can effectively solve problems such as long charging time and short endurance mileage of lithium batteries. It is a new energy vehicle power system with broad development prospects. The BOP parts constituting the hydrogen fuel cell system include an air compressor, a hydrogen pump, an intercooler and humidifier, an ejector, etc. For the above-mentioned BOP parts, a testing device is required to test their performance to ensure that the performance of the BOP parts installed in the hydrogen fuel cell system can meet the usage requirements of the hydrogen fuel cell system.

[0003] Currently, in the performance test of BOP parts, two parts of space in the testing device are required to place a high-voltage power supply and a low-voltage power supply input, and a protective cover for protecting the power supply needs to be additionally manufactured. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems that the high-voltage power supply and the low-voltage power supply need two parts of space to be placed and a protective structure such as a protective cover needs to be additionally set in the background art, and to propose a box body structure integrating high and low voltage current input and output.

[0005] The technical solution of the utility model: a box body structure integrating high and low voltage current input and output, comprising:

[0006] A box body, with an upper cover arranged on the top of the box body, a low-voltage inlet hole and a high-voltage inlet hole arranged at one end of the box body, and an outlet hole arranged at the opposite end of the box body;

[0007] A partition, vertically arranged in the box body;

[0008] And insulating pads, arranged on the inner wall of the bottom of the box body, with two insulating pads respectively located on both sides of the partition. A low-voltage input device and a high-voltage input mechanism are respectively arranged on the two insulating pads. The low-voltage input device and the high-voltage input mechanism respectively provide a low-voltage power supply and a high-voltage power supply for the BOP performance test.

[0009] Preferably, a plurality of connecting columns are vertically arranged at the bottom of the box body, and the upper cover and the connecting columns are fixed by inserting countersunk head screws into the connecting columns.

[0010] Preferably, the high-voltage input mechanism includes a DC power supply terminal block arranged on the insulating pad, and two high-voltage copper bars connected to the DC power supply terminal block. The high-voltage copper bars are arranged on the insulating pad, and the two high-voltage copper bars are respectively the positive pole and the negative pole.

[0011] Preferably, it further includes a main positive relay disposed on the insulating spacer, and the main positive relay controls the on-off of the high-voltage copper bar at the positive pole.

[0012] Preferably, a precharge relay and a precharge resistor are disposed on the insulating spacer, and after being connected in series, the precharge relay and the precharge resistor are connected in parallel with the main positive relay.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects: The whole box body is processed from transparent acrylic board, with superior appearance and strong materials; the internal insulating spacer is processed from bakelite material, which can be freely processed with threads to achieve the purpose of free assembly, and has excellent insulation performance, which can ensure that there is no leakage risk during the whole current flow process. A partition is provided to separate the high-voltage and low-voltage power supplies and avoid mutual electromagnetic interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0015] Figure 2 is Figure 1 the internal structural diagram of.

[0016] Reference numerals: 1, box body; 2, upper cover; 3, low-voltage inlet hole; 4, high-voltage inlet hole; 5, outlet hole; 6, insulating spacer; 7, DC power supply terminal block; 8, high-voltage copper bar; 9, low-voltage input device; 10, main positive relay; 11, precharge relay; 12, precharge resistor; 13, connecting column; 14, partition; 15, countersunk head screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Embodiment 1

[0018] As Figure 1 - Figure 2 shown, a box body structure integrating high-voltage and low-voltage current input and output proposed by the utility model includes:

[0019] A box body 1, with an upper cover provided at the top of the box body 1. Specifically, a plurality of connecting columns 13 are vertically provided at the bottom of the box body 1, and the upper cover 2 and the connecting columns 13 are fixed by inserting countersunk head screws 15 into the connecting columns 13. A low-voltage inlet hole 3 and a high-voltage inlet hole 4 are provided at one end of the box body 1, and an outlet hole 5 is provided at the opposite end of the box body 1;

[0020] A partition 14, vertically provided inside the box body 1;

[0021] And an insulating spacer 6, provided on the inner wall of the bottom of the box body 1. Two insulating spacers 6 are provided and are respectively located on both sides of the partition 14. A low-voltage input device 9 and a high-voltage input mechanism are respectively provided on the two insulating spacers 6. The low-voltage input device 9 and the high-voltage input mechanism respectively provide a low-voltage power supply and a high-voltage power supply for the BOP performance test, and the low-voltage input device 9 is connected to a 220V voltage.

[0022] Embodiment 2

[0023] As Figure 2 shown, a box body structure integrating high - and low - voltage current input and output proposed by the present utility model, compared with Embodiment 1, the structure of the high - voltage input mechanism is introduced in detail in this embodiment.

[0024] The high - voltage input mechanism includes a DC power supply terminal block 7 arranged on an insulating spacer 6, and two high - voltage copper bars 8 connected to the DC power supply terminal block 7. The high - voltage copper bars 8 are arranged on the insulating spacer 6, and the two high - voltage copper bars 8 are respectively the positive pole and the negative pole.

[0025] Furthermore, it also includes a main positive relay 10 arranged on the insulating spacer 6, and the main positive relay 10 controls the on - off of the high - voltage copper bar 8 of the positive pole. A pre - charge relay 11 and a pre - charge resistor 12 are arranged on the insulating spacer 6. After being connected in series, the pre - charge relay 11 and the pre - charge resistor 12 are connected in parallel with the main positive relay 10. The function of the pre - charge resistor 12 is to limit the instantaneous large current before the main positive relay 10 is fully closed, protecting the main positive relay 10 from being damaged. The function of the pre - charge relay 11 in the DC high - voltage power system is to provide a pre - charge circuit path between the main power supply and the load to control the initial flow of current, ensuring the safe and stable startup of the system. Here, "pre - charge" means that before the main circuit is closed, a potential difference is gradually established for the circuit through the pre - charge circuit path to avoid the impact of instantaneous large current generated by directly connecting to the high - voltage power supply.

[0026] In summary, in the present utility model, in the box body 1, the function of the DC power supply terminal block 7 is to input high - voltage; the function of the main positive relay 10 is to control the positive and negative circuits; the function of the pre - charge relay 11 is to pre - charge the DC high - voltage power; the function of the pre - charge resistor 12 is to protect the entire high - voltage circuit; the function of the low - voltage input device 9 is to input 220V power; the function of the high - voltage copper bar 8 is to transfer high - voltage current. The entire structure can play a role in protecting the external power supply. When in use, the high - voltage current enters the DC power supply terminal block 7 through the cable. The high - voltage copper bar 8 serves as a carrier of the high - voltage current. The positive - pole current enters the main positive relay 10 to control the positive and negative circuits. At the same time, the pre - charge relay 11 and the pre - charge resistor 12 are connected in parallel for the purpose of pre - charging the DC high - voltage power, and finally output to the outside of the electrical box through the high - voltage copper bar 8;

[0027] The entire box body is processed from transparent acrylic board, with excellent appearance and strong material; the internal insulating spacer 6 is processed from bakelite material, which can be freely processed with threads for the purpose of free assembly, and has excellent insulation performance, ensuring that there will be no leakage risk during the entire current flow process. A partition 14 is provided to separate the high - and low - voltage power supplies to avoid mutual electromagnetic interference.

[0028] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the relevant technical field.

Claims

1. A box structure integrating high and low voltage current input and output, characterized in that: include: A box body (1), an upper cover is arranged on the top of the box body (1), a low-voltage wire inlet hole (3) and a high-voltage wire inlet hole (4) are arranged at one end of the box body (1), and an outlet hole (5) is arranged at the other end of the box body (1); A partition (14) is vertically arranged in the box body (1); and an insulating pad (6) arranged on the inner wall of the bottom of the box body (1); two insulating pads (6) are arranged and are respectively located on both sides of the partition (14); a low-voltage input device (9) and a high-voltage input mechanism are respectively arranged on the two insulating pads (6); the low-voltage input device (9) and the high-voltage input mechanism respectively provide a low-voltage power supply and a high-voltage power supply for the BOP performance test.

2. The box structure with integrated high and low voltage current input and output according to claim 1, characterized in that: A plurality of connecting columns (13) are vertically arranged at the bottom of the box body (1), and the upper cover (2) and the connecting columns (13) are fixed by inserting countersunk screws (15) into the connecting columns (13).

3. The box structure with integrated high and low voltage current input and output according to claim 1, characterized in that: The high-voltage input mechanism comprises a DC power supply terminal block (7) arranged on an insulating spacer (6), and two high-voltage copper bars (8) connected to the DC power supply terminal block (7); the high-voltage copper bars (8) are arranged on the insulating spacer (6), and the two high-voltage copper bars (8) are respectively a positive electrode and a negative electrode.

4. The box structure with integrated high and low voltage current input and output according to claim 3 is characterized in that: It also includes a main positive relay (10) arranged on the insulating pad (6), and the main positive relay (10) controls the on and off of the positive high-voltage copper busbar (8).

5. The box structure with integrated high and low voltage current input and output according to claim 4, characterized in that: A pre-charging relay (11) and a pre-charging resistor (12) are arranged on the insulating pad (6); the pre-charging relay (11) and the pre-charging resistor (12) are connected in series and then connected in parallel with the main positive relay (10).

Images