Ship charge and discharge board and UPS battery discharge capacity detection box

Abstract

The utility model relates to a ship charge and discharge board and UPS battery discharge capacity detection box, which comprises a box body, a discharge load module, a voltage reduction module, a rectification block, a direct current contactor and a cooling fan are arranged in the box body, and the discharge load module comprises a resistance wire input indicating lamp group, a direct current air switch group and a resistance wire group; the outer surface of the box body is provided with a function board, a temperature display alarm board, a temperature switch, an input binding post, an input indicating lamp and a start-stop button, and the start-stop indicating lamp, the direct current air switch group and the resistance wire input indicating lamp group are arranged on the outer surface of the box body; all parts on the box body are connected through a circuit board. The power supply device has the advantages of being convenient to use, large in power, large in suitable voltage range, capable of achieving air cooling heat dissipation, comprehensive in panel display parameter, low in cost, small in size, comprehensive in safety protection and convenient to operate. And safe use of the ship in a severe environment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric capacity testing equipment, in particular to a ship charging and discharging board and a UPS battery discharge capacity detection box. Background Art

[0002] With the rapid development of new technologies in the shipbuilding industry, the equipment on ships is becoming more and more numerous and complex. The most important equipment on modern ships is powered by ship charging and discharging panels and UPS batteries to ensure the ultimate safety of the ship. The battery capacity and discharge time of the charging and discharging panels and UPS are required. Due to the influence of usage time and storage time, the battery capacity of the ship charging and discharging panels and UPS may not meet the requirements, resulting in the battery pack being unable to provide the required energy in the emergency state of the ship, causing safety hazards. Therefore, the capacity inspection of ship charging and discharging panels and UPS batteries is particularly important.

[0003] At present, the industry usually uses multiple 24V60W low-voltage bulbs in parallel as the load discharge method for debugging and checking the charging and discharging boards and large-capacity battery packs of UPS. There are many problems when debugging personnel use the above method to check the equipment: ① Many bulbs need to be connected in parallel; ② The bulbs are easy to break; ③ The discharge voltage, current, time, capacity and other parameters cannot be determined; ④ Short circuit is easy to occur; ⑤ The discharge time is long. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provides a ship charging and discharging board and a UPS battery discharge capacity detection box.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a ship charging and discharging board and a UPS battery discharge capacity detection box, comprising a box body, a discharge load module, a step-down module, a rectifier block, a DC contactor, and a cooling fan are arranged inside the box body, and the discharge load module comprises a resistance wire input indicator light group, a DC air switch group, and a resistance wire group;

[0006] The outer surface of the box is provided with a function board, a temperature display alarm board, a temperature switch, an input terminal, an input indicator light, a start / stop button, a start / stop indicator light, a DC air switch group and a resistance wire input indicator light group.

[0007] The components on the box are connected through the circuit board, the input terminal is connected to the DC contactor contact and the rectifier block respectively, the DC contactor contact is connected to the discharge load module, the rectifier block is connected to the input indicator light and the step-down module respectively, the step-down module is connected to the cooling fan, the function board, the temperature display alarm board, the DC contactor, and the start-stop indicator light respectively, and the DC contactor is connected to the temperature switch, the function board contact, the temperature display alarm board contact, and the start-stop button respectively;

[0008] The charge and discharge board or UPS battery is connected to the input terminal to detect the discharge capacity.

[0009] In particular, the temperature display alarm panel is installed at the air outlet of the box.

[0010] In particular, the DC air switch group includes a first DC air switch, a second DC air switch, a third DC air switch, a fourth DC air switch, a fifth DC air switch, a sixth DC air switch, a seventh DC air switch, an eighth DC air switch, and a ninth DC air switch.

[0011] In particular, the rated current of the first DC air switch, the second DC air switch, and the third DC air switch are all 32A, the rated current of the fourth DC air switch and the fifth DC air switch are both 20A, the rated current of the sixth DC air switch and the seventh DC air switch are both 16A, the rated current of the eighth DC air switch is 10A, and the rated current of the ninth DC air switch is 6A.

[0012] In particular, the resistance wire input indicator light group includes a first resistance wire input indicator light, a second resistance wire input indicator light, a third resistance wire input indicator light, a fourth resistance wire input indicator light, a fifth resistance wire input indicator light, a sixth resistance wire input indicator light, a seventh resistance wire input indicator light, an eighth resistance wire input indicator light, and a ninth resistance wire input indicator light.

[0013] In particular, the rated power of the first resistance wire input indicator light, the second resistance wire input indicator light, and the third resistance wire input indicator light are all 545W, the rated power of the fourth resistance wire input indicator light and the fifth resistance wire input indicator light are both 360W, the rated power of the sixth resistance wire input indicator light and the seventh resistance wire input indicator light are both 240W, the rated power of the eighth resistance wire input indicator light is 120W, and the rated power of the ninth resistance wire input indicator light is 60W.

[0014] Particularly, the resistance wire group includes a first resistance wire, a second resistance wire, a third resistance wire, a fourth resistance wire, a fifth resistance wire, a sixth resistance wire, a seventh resistance wire, an eighth resistance wire, and a ninth resistance wire.

[0015] In particular, the voltage of the first resistor wire, the second resistor wire, the third resistor wire, the fourth resistor wire, the fifth resistor wire, the sixth resistor wire, the seventh resistor wire, the eighth resistor wire and the ninth resistor wire are all 24V; the power of the first resistor wire, the second resistor wire and the third resistor wire is 545W, the power of the fourth resistor wire and the fifth resistor wire is 360W, the power of the sixth resistor wire and the seventh resistor wire is 240W, the power of the eighth resistor wire is 120W, and the power of the ninth resistor wire is 60W.

[0016] In particular, the connection circuit of the discharge load module is: the DC contactor contacts are connected in series with the first DC air switch, the second DC air switch, the third DC air switch, the fourth DC air switch, the fifth DC air switch, the sixth DC air switch, the seventh DC air switch, the eighth DC air switch, and the ninth DC air switch; the first resistor is connected in parallel with the light-emitting diode of the first resistor input indicator light and then connected in series with the first DC air switch; the second resistor is connected in parallel with the light-emitting diode of the second resistor input indicator light and then connected in series with the second DC air switch; the third resistor is connected in parallel with the light-emitting diode of the third resistor input indicator light and then connected in series with the third DC air switch; The fourth resistor is connected in parallel with the light-emitting diode of the fourth resistor indicator light and then connected in series with the fourth DC air switch, the fifth resistor is connected in parallel with the light-emitting diode of the fifth resistor indicator light and then connected in series with the fifth DC air switch, the sixth resistor is connected in parallel with the light-emitting diode of the sixth resistor indicator light and then connected in series with the sixth DC air switch, the seventh resistor is connected in parallel with the light-emitting diode of the seventh resistor indicator light and then connected in series with the seventh DC air switch, the eighth resistor is connected in parallel with the light-emitting diode of the eighth resistor indicator light and then connected in series with the eighth DC air switch, and the ninth resistor is connected in parallel with the light-emitting diode of the ninth resistor indicator light and then connected in series with the ninth DC air switch.

[0017] In particular, the rectifier block is connected in parallel with the light-emitting diode of the input indicator light and the input end of the buck module, the output end of the buck module, the cooling fan, the function board, and the temperature display alarm board are connected in parallel, and the DC contactor is connected in parallel with the light-emitting diode of the start-stop indicator light and then in series with the temperature switch, the function board contact, the temperature display alarm board contact, the start-stop button, and the output end of the buck module.

[0018] The beneficial effects of the utility model are as follows: the utility model utilizes a high-power resistor wire as a load for discharge, has a large input power, and is suitable for a wide voltage range; it is cooled by a heat dissipation fan, and has a good heat dissipation effect; it has nine levels of discharge power adjustment, and is flexible and convenient to use; the panel displays comprehensive parameters, and multiple parameters such as input voltage, current, power, capacity, and discharge time can be displayed simultaneously; it has perfect protection measures for faults such as undervoltage, overcurrent, high temperature, and short circuit, and has comprehensive safety protection; the overall structure is light in weight, small in size, low in cost, and easy to operate, and is suitable for actual capacity detection of large battery packs on ships and land, to ensure the safe use of ships in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the box structure of the utility model;

[0020] Figure 2 It is a schematic top view of the box body of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection of various components on the box body of the utility model;

[0022] Figure 4 This is a schematic diagram of the circuit connections of various components on the box of the utility model;

[0023] In the figure: 1-DC contactor contact; 2-first DC air switch; 3-second DC air switch; 4-third DC air switch; 5-fourth DC air switch; 6-fifth DC air switch; 7-sixth DC air switch; 8-seventh DC air switch; 9-eighth DC air switch; 10-ninth DC air switch; 11-first resistor; 12-second resistor; 13-third resistor; 14-fourth resistor; 15-fifth resistor; 16-sixth resistor; 17-seventh resistor; 18-eighth resistor; 19-ninth resistor; 20-first resistor input indicator; 21-second resistor input indicator Light; 22-third resistor input indicator light; 23-fourth resistor input indicator light; 24-fifth resistor input indicator light; 25-sixth resistor input indicator light; 26-seventh resistor input indicator light; 27-eighth resistor input indicator light; 28-ninth resistor input indicator light; 29-rectifier block; 30-input indicator light; 31-step-down module; 32-cooling fan; 33-function board; 34-temperature display alarm board; 35-DC contactor; 36-start-stop indicator light; 37-temperature switch; 38-function board contact; 39-temperature display alarm board contact; 40-start-stop button; 41-input terminal; 42-box;

[0024] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0026] like Figure 1-Figure 4 As shown, a ship charging and discharging board and UPS battery discharge capacity detection box includes a box body 42, and a discharge load module, a step-down module 31, a rectifier block 29, a DC contactor 35 (200A), and a cooling fan 32 are arranged inside the box body 42. The discharge load module includes a resistance wire input indicator light group, a DC air switch group, and a resistance wire group;

[0027] The outer surface of the box 42 is provided with a function board 33, a temperature display alarm board 34, a temperature switch 37, an input terminal 41, an input indicator light 30, a start / stop button 40, and a start / stop indicator light 36. A DC air switch group and a resistance wire input indicator light group are arranged on the outer surface of the box 42, and the temperature display alarm board 34 is installed at the air outlet of the box 42; the function board 33 is a color screen multifunctional display board, which can display parameters such as voltage, current, power, capacity, and discharge time;

[0028] The components on the box body 42 are connected through a circuit board, the input terminal 41 is respectively connected to the DC contactor contact 1 and the rectifier block 29, the DC contactor contact 1 is connected to the discharge load module, the rectifier block 29 is respectively connected to the input indicator light 30 and the step-down module 31, the step-down module 31 is respectively connected to the cooling fan 32, the function board 33, the temperature display alarm board 34, the DC contactor 35, and the start-stop indicator light 36, the DC contactor 35 is respectively connected to the temperature switch 37, the function board contact 38, the temperature display alarm board contact 39, and the start-stop button 40;

[0029] The charge and discharge board or UPS battery is connected to the input terminal 41 to perform discharge capacity detection.

[0030] The DC air switch group includes a first DC air switch 2, a second DC air switch 3, a third DC air switch 4, a fourth DC air switch 5, a fifth DC air switch 6, a sixth DC air switch 7, a seventh DC air switch 8, an eighth DC air switch 9, and a ninth DC air switch 10;

[0031] Specifically, the rated current of the first DC air switch 2, the second DC air switch 3, and the third DC air switch 4 are all 32A, the rated current of the fourth DC air switch 5 and the fifth DC air switch 6 are both 20A, the rated current of the sixth DC air switch 7 and the seventh DC air switch 8 are both 16A, the rated current of the eighth DC air switch 9 is 10A, and the rated current of the ninth DC air switch 10 is 6A.

[0032] The resistance wire input indicator light group includes a first resistance wire input indicator light 20, a second resistance wire input indicator light 21, a third resistance wire input indicator light 22, a fourth resistance wire input indicator light 23, a fifth resistance wire input indicator light 24, a sixth resistance wire input indicator light 25, a seventh resistance wire input indicator light 26, an eighth resistance wire input indicator light 27, and a ninth resistance wire input indicator light 28;

[0033] Specifically, the rated power of the first resistance wire input indicator light 20, the second resistance wire input indicator light 21, and the third resistance wire input indicator light 22 are all 545W, the rated power of the fourth resistance wire input indicator light 23 and the fifth resistance wire input indicator light 24 are both 360W, the rated power of the sixth resistance wire input indicator light 25 and the seventh resistance wire input indicator light 26 are both 240W, the rated power of the eighth resistance wire input indicator light 27 is 120W, and the rated power of the ninth resistance wire input indicator light 28 is 60W.

[0034] The resistance wire group includes a first resistance wire 11, a second resistance wire 12, a third resistance wire 13, a fourth resistance wire 14, a fifth resistance wire 15, a sixth resistance wire 16, a seventh resistance wire 17, an eighth resistance wire 18, and a ninth resistance wire 19;

[0035] Specifically, the voltage of the first resistor 11, the second resistor 12, the third resistor 13, the fourth resistor 14, the fifth resistor 15, the sixth resistor 16, the seventh resistor 17, the eighth resistor 18 and the ninth resistor 19 are all 24V; the power of the first resistor 11, the second resistor 12 and the third resistor 13 is 545W, the power of the fourth resistor 14 and the fifth resistor 15 is 360W, the power of the sixth resistor 16 and the seventh resistor 17 is 240W, the power of the eighth resistor 18 is 120W, and the power of the ninth resistor 19 is 60W.

[0036] The connection circuit of the discharge load module is as follows: the DC contactor contact 1 is connected in series with the first DC air switch 2, the second DC air switch 3, the third DC air switch 4, the fourth DC air switch 5, the fifth DC air switch 6, the sixth DC air switch 7, the seventh DC air switch 8, the eighth DC air switch 9, and the ninth DC air switch 10; the first resistor 11 is connected in parallel with the light-emitting diode of the first resistor input indicator light 20 and then connected in series with the first DC air switch 2; the second resistor 12 is connected in parallel with the light-emitting diode of the second resistor input indicator light 21 and then connected in series with the second DC air switch 3; the third resistor 13 is connected in parallel with the light-emitting diode of the third resistor input indicator light 22 and then connected in series with the third DC air switch 4; the fourth resistor 1 4 is connected in parallel with the light emitting diode of the fourth resistor input indicator light 23 and then connected in series with the fourth DC air switch 5, the fifth resistor 15 is connected in parallel with the light emitting diode of the fifth resistor input indicator light 24 and then connected in series with the fifth DC air switch 6, the sixth resistor 16 is connected in parallel with the light emitting diode of the sixth resistor input indicator light 25 and then connected in series with the sixth DC air switch 7, the seventh resistor 17 is connected in parallel with the light emitting diode of the seventh resistor input indicator light 26 and then connected in series with the seventh DC air switch 8, the eighth resistor 18 is connected in parallel with the light emitting diode of the eighth resistor input indicator light 27 and then connected in series with the eighth DC air switch 9, and the ninth resistor 19 is connected in parallel with the light emitting diode of the ninth resistor input indicator light 28 and then connected in series with the ninth DC air switch 10.

[0037] The rectifier block 29 is connected in parallel with the light-emitting diode of the input indicator light 30 and the input end of the step-down module 31, and the output end of the step-down module 31, the cooling fan 32, the function board 33, and the temperature display alarm board 34 are connected in parallel. The DC contactor 35 is connected in parallel with the light-emitting diode of the start-stop indicator light 36 and then in series with the temperature switch 37, the function board contact 38, the temperature display alarm board contact 39, the start-stop button 40, and the output end of the step-down module 31.

[0038] The parameters in the above circuit are:

[0039] 1. Detect battery pack voltage: DC 12V, 24V;

[0040] 2. Discharge current: 24V maximum continuous 125A, 12V maximum continuous 62A;

[0041] 3. Discharge power: 24V maximum continuous 3000W, 12V maximum continuous 740W;

[0042] 4. Discharge time: 24V1000AH is 8 hours;

[0043] The protection measures adopted are:

[0044] 1. Undervoltage: 21.6V stops discharging;

[0045] 2. Overcurrent: total 150A, 9 branches are 32 / 20 / 16 / 10 / 6A respectively, and the discharge will stop when the set value is exceeded;

[0046] 3. Temperature: The air outlet is 90°C and the outer shell of the box 42 is 120°C to stop discharging;

[0047] 4. Over power: 3500W stops discharging;

[0048] 5. Anti-reverse connection;

[0049] 6. Sound and light alarm.

[0050] When the utility model is working, the discharge capacity of the ship charging and discharging plate is tested:

[0051] The ship charging and discharging board is connected to the input terminal 41 of the detection box, the input indicator light 30 is lit, the step-down module 31 is powered by the anti-reverse connection rectifier block 29, outputs a 12V voltage, and the cooling fan 32, the function board 33, and the temperature display alarm board 34 are powered and run;

[0052] When the start / stop button 40 is pressed, the DC contactor 35 is activated, the start / stop indicator light 36 is lit, and the contact 1 of the DC contactor is closed. The DC air switches in the DC air switch group (the first DC air switch 2, the second DC air switch 3, the third DC air switch 4, the fourth DC air switch 5, the fifth DC air switch 6, the sixth DC air switch 7, the seventh DC air switch 8, the eighth DC air switch 9, and the ninth DC air switch 10) are toggled according to the different capacity battery packs, and the corresponding resistors in the resistor group (the first resistor 11, the second resistor 12, the third resistor 13, the fourth resistor 14) are turned on. The first resistor 4, the fifth resistor 15, the sixth resistor 16, the seventh resistor 17, the eighth resistor 18, and the ninth resistor 19) are energized to obtain different discharge currents, and at the same time, the corresponding resistor input indicator lights in the resistor input indicator light group (the first resistor input indicator light 20, the second resistor input indicator light 21, the third resistor input indicator light 22, the fourth resistor input indicator light 23, the fifth resistor input indicator light 24, the sixth resistor input indicator light 25, the seventh resistor input indicator light 26, the eighth resistor input indicator light 27, and the ninth resistor input indicator light 28) are energized and light up;

[0053] During the discharge process, the function board 33 automatically times. If undervoltage or overcurrent is detected, exceeding the set value, the function board contact 38 will be actuated, the DC contactor contact 1 will open, the resistance wire will be cut off, and the discharge will be stopped; the temperature control is composed of the temperature switch 37 and the temperature display alarm board 34. The temperature switch 37 is installed on the box body 42, and the temperature display alarm board 34 is installed at the air outlet. If any temperature exceeds the set value, the DC contactor contact 1 will open, the resistance wire will be cut off, and the discharge will be stopped; if a short circuit fault occurs, the DC air switch will trip and cut off the fault branch.

[0054] Test the discharge capacity of the UPS battery pack:

[0055] The battery pack of the UPS is connected to the input terminal 41 of the detection box, the input indicator light 30 is lit, the step-down module 31 is powered through the anti-reverse connection rectifier block 29, outputs a 12V voltage, and the cooling fan 32, the function board 33, and the temperature display alarm board 34 are powered and run;

[0056] When the start / stop button 40 is pressed, the DC contactor 35 is activated, the start / stop indicator light 36 is lit, and the contact 1 of the DC contactor is closed. The DC air switches in the DC air switch group (the first DC air switch 2, the second DC air switch 3, the third DC air switch 4, the fourth DC air switch 5, the fifth DC air switch 6, the sixth DC air switch 7, the seventh DC air switch 8, the eighth DC air switch 9, and the ninth DC air switch 10) are toggled according to the different capacity battery packs, and the corresponding resistors in the resistor group (the first resistor 11, the second resistor 12, the third resistor 13, the fourth resistor 14) are turned on. The first resistor 4, the fifth resistor 15, the sixth resistor 16, the seventh resistor 17, the eighth resistor 18, and the ninth resistor 19) are energized to obtain different discharge currents, and at the same time, the corresponding resistor input indicator lights in the resistor input indicator light group (the first resistor input indicator light 20, the second resistor input indicator light 21, the third resistor input indicator light 22, the fourth resistor input indicator light 23, the fifth resistor input indicator light 24, the sixth resistor input indicator light 25, the seventh resistor input indicator light 26, the eighth resistor input indicator light 27, and the ninth resistor input indicator light 28) are energized and light up;

[0057] During the discharge process, the function board 33 automatically times. If undervoltage or overcurrent is detected, exceeding the set value, the function board contact 38 will be actuated, the DC contactor contact 1 will open, the resistance wire will be cut off, and the discharge will be stopped; the temperature control is composed of the temperature switch 37 and the temperature display alarm board 34. The temperature switch 37 is installed on the box body 42, and the temperature display alarm board 34 is installed at the air outlet. If any temperature exceeds the set value, the DC contactor contact 1 will open, the resistance wire will be cut off, and the discharge will be stopped; if a short circuit fault occurs, the DC air switch will trip and cut off the fault branch.

[0058] The utility model has the characteristics of easy use, high power, suitable for a wide voltage range, air cooling and heat dissipation, comprehensive panel display parameters, low cost, small size, comprehensive safety protection, and easy operation. It has good detection effect on the discharge capacity of ship charging and discharging panels and UPS batteries, ensuring the safe use of ships in harsh environments.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A ship charging and discharging board and a UPS battery discharge capacity detection box, comprising a box body (42), characterized in that: A discharge load module, a voltage reduction module (31), a rectifier block (29), a DC contactor (35), and a cooling fan (32) are arranged inside the box (42); the discharge load module includes a resistance wire input indicator light group, a DC air switch group, and a resistance wire group; The outer surface of the box (42) is provided with a function board (33), a temperature display alarm board (34), a temperature switch (37), an input terminal (41), an input indicator light (30), a start / stop button (40), and a start / stop indicator light (36); a DC air switch group and a resistance wire input indicator light group are provided on the outer surface of the box (42); The components on the box body (42) are connected via a circuit board; the input terminal (41) is respectively connected to the DC contactor contact (1) and the rectifier block (29); the DC contactor contact (1) is connected to the discharge load module; the rectifier block (29) is respectively connected to the input indicator light (30) and the step-down module (31); the step-down module (31) is respectively connected to the cooling fan (32), the function board (33), the temperature display alarm board (34), the DC contactor (35), and the start / stop indicator light (36); the DC contactor (35) is respectively connected to the temperature switch (37), the function board contact (38), the temperature display alarm board contact (39), and the start / stop button (40); The charge and discharge board or UPS battery is connected to the input terminal (41) to perform discharge capacity detection.

2. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 1, characterized in that: The temperature display alarm panel (34) is installed at the air outlet of the box body (42).

3. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 2, characterized in that: The DC air switch group comprises a first DC air switch (2), a second DC air switch (3), a third DC air switch (4), a fourth DC air switch (5), a fifth DC air switch (6), a sixth DC air switch (7), a seventh DC air switch (8), an eighth DC air switch (9), and a ninth DC air switch (10).

4. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 3, characterized in that: The rated currents of the first DC air switch (2), the second DC air switch (3) and the third DC air switch (4) are all 32A, the rated currents of the fourth DC air switch (5) and the fifth DC air switch (6) are all 20A, the rated currents of the sixth DC air switch (7) and the seventh DC air switch (8) are all 16A, the rated current of the eighth DC air switch (9) is 10A, and the rated current of the ninth DC air switch (10) is 6A.

5. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 4, characterized in that: The resistance wire input indicator light group comprises a first resistance wire input indicator light (20), a second resistance wire input indicator light (21), a third resistance wire input indicator light (22), a fourth resistance wire input indicator light (23), a fifth resistance wire input indicator light (24), a sixth resistance wire input indicator light (25), a seventh resistance wire input indicator light (26), an eighth resistance wire input indicator light (27), and a ninth resistance wire input indicator light (28).

6. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 5, characterized in that: The rated powers of the first resistance wire input indicator light (20), the second resistance wire input indicator light (21), and the third resistance wire input indicator light (22) are all 545W, the rated powers of the fourth resistance wire input indicator light (23) and the fifth resistance wire input indicator light (24) are all 360W, the rated powers of the sixth resistance wire input indicator light (25) and the seventh resistance wire input indicator light (26) are all 240W, the rated power of the eighth resistance wire input indicator light (27) is 120W, and the rated power of the ninth resistance wire input indicator light (28) is 60W.

7. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 6, characterized in that: The resistance wire group comprises a first resistance wire (11), a second resistance wire (12), a third resistance wire (13), a fourth resistance wire (14), a fifth resistance wire (15), a sixth resistance wire (16), a seventh resistance wire (17), an eighth resistance wire (18), and a ninth resistance wire (19).

8. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 7, characterized in that: The voltages of the first resistor (11), the second resistor (12), the third resistor (13), the fourth resistor (14), the fifth resistor (15), the sixth resistor (16), the seventh resistor (17), the eighth resistor (18), and the ninth resistor (19) are all 24V; the power of the first resistor (11), the second resistor (12), and the third resistor (13) is 545W, the power of the fourth resistor (14) and the fifth resistor (15) is 360W, the power of the sixth resistor (16) and the seventh resistor (17) is 240W, the power of the eighth resistor (18) is 120W, and the power of the ninth resistor (19) is 60W.

9. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 8, characterized in that: The connection circuit of the discharge load module is as follows: the DC contactor contact (1) is connected in series with the first DC air switch (2), the second DC air switch (3), the third DC air switch (4), the fourth DC air switch (5), the fifth DC air switch (6), the sixth DC air switch (7), the seventh DC air switch (8), the eighth DC air switch (9), and the ninth DC air switch (10); the first resistor (11) is connected in parallel with the light emitting diode of the first resistor input indicator light (20) and then connected in series with the first DC air switch (2); the second resistor (12) is connected in parallel with the light emitting diode of the second resistor input indicator light (21) and then connected in series with the second DC air switch (3); the third resistor (13) is connected in parallel with the light emitting diode of the third resistor input indicator light (22) and then connected in series with the third DC air switch (4); the fourth resistor (14) is connected in parallel with the light emitting diode of the third resistor input indicator light (22) and then connected in series with the third DC air switch (4); (14) is connected in parallel with the light emitting diode of the fourth resistor input indicator light (23) and then connected in series with the fourth DC air switch (5); the fifth resistor (15) is connected in parallel with the light emitting diode of the fifth resistor input indicator light (24) and then connected in series with the fifth DC air switch (6); the sixth resistor (16) is connected in parallel with the light emitting diode of the sixth resistor input indicator light (25) and then connected in series with the sixth DC air switch (7); the seventh resistor (17) is connected in parallel with the light emitting diode of the seventh resistor input indicator light (26) and then connected in series with the seventh DC air switch (8); the eighth resistor (18) is connected in parallel with the light emitting diode of the eighth resistor input indicator light (27) and then connected in series with the eighth DC air switch (9); the ninth resistor (19) is connected in parallel with the light emitting diode of the ninth resistor input indicator light (28) and then connected in series with the ninth DC air switch (10).

10. A ship charging and discharging board and UPS battery discharge capacity detection box according to claim 9, characterized in that: The rectifier block (29) is connected in parallel with the light emitting diode of the input indicator light (30) and the input end of the step-down module (31); the output end of the step-down module (31), the cooling fan (32), the function board (33) and the temperature display alarm board (34) are connected in parallel; the DC contactor (35) is connected in parallel with the light emitting diode of the start / stop indicator light (36) and then connected in series with the temperature switch (37), the function board contact (38), the temperature display alarm board contact (39), the start / stop button (40) and the output end of the step-down module (31).

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