Electrical test device for small-power galvanic pile test bench

Abstract

The utility model discloses an electrical testing device for a small-power galvanic pile testboard, which relates to the technical field of fuel cell testing devices and comprises a positive terminal and a negative terminal, the two ends of the positive terminal are respectively connected with an external power supply positive pole and a load positive terminal, and the two ends of the negative terminal are respectively connected with an external power supply negative pole load and a load negative terminal. Wherein a relay K2 and a diverter R2 are connected in series between the positive connection terminal and the load positive connection terminal, a relay K4 is connected in series between the negative connection terminal and the load negative connection terminal, the load positive connection terminal and the load negative connection terminal are connected with an electronic load, the electronic load is connected with an online insulation detector, a voltage sensor and a leakage starting resistor R1 in parallel, the online insulation detector is connected with a relay K1 in series, and the relay K1 is connected with the relay K1 in series. The R1 leakage starting resistor is connected in series with the K3 relay; according to the technical scheme provided by the invention, the electrical test requirement of the small electric pile test use requirement can be met, and the evaluation of key performance indexes such as the output power, the energy conversion efficiency and the stability of the small electric pile can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell testing devices, in particular to an electrical testing device for a low-power fuel cell stack testing bench. Background Art

[0002] Communication base stations are generally powered by city electricity. In order to ensure that the base station works stably and reliably, it is also necessary to equip the base station with a backup power supply system such as a lead-acid battery pack and a mobile oil generator to charge when the power is off. In order to ensure the normal operation of the equipment, the backup power supply system provides power to the load in the base station in time. Hydrogen fuel cells are an environmentally friendly, energy-saving and efficient power generation system. The application of new green energy to replace or partially replace the original backup energy supply of communication base stations has become one of the effective means to reduce carbon emissions and control electricity costs in base stations. The use of hydrogen fuel cell power generation systems as backup power sources for communication base stations generally requires a power of between 10-30kW. Since the test of small-power battery stacks has different working conditions, it is necessary to provide various performance test conditions for the battery stack characteristics used in communication base stations to ensure that various working parameters and physical and chemical indicators match the specific needs of user usage scenarios. Therefore, it is urgently needed to build an electrical system for testing 10-30kW small-power battery stacks. However, there is currently no electrical test device that can meet the test requirements of small battery stacks. Therefore, this application proposes an electrical test device for a small-power battery stack test bench. Summary of the invention

[0003] In view of the defects existing in the prior art, the purpose of the utility model is to provide an electrical testing device for a small-power battery stack test bench, aiming to solve the technical problems in the related technology to a certain extent.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An electrical test device for a small-power battery stack test bench comprises a positive terminal, a negative terminal, a load positive terminal and a load negative terminal, wherein two ends of the positive terminal are respectively connected to a positive pole of an external power source and a positive terminal of the load, and two ends of the negative terminal are respectively connected to a negative pole of an external power source, a load and a negative terminal of the load, wherein a K2 relay and an R2 shunt are connected in series between the positive terminal and the positive terminal of the load, a K4 relay is connected in series between the negative terminal and the negative terminal of the load, an electronic load is connected to the positive terminal of the load and the negative terminal of the load, an online insulation tester, a voltage sensor and an R1 start-and-leak resistor are connected in parallel to the electronic load, the online insulation tester is connected in series to the K1 relay, and the R1 start-and-leak resistor is connected in series to the K3 relay; wherein the R2 shunt is also connected in parallel to a DC ammeter.

[0006] On the basis of the above technical solution, the K1 relay, K2 relay, K3 relay and K4 relay are one or a combination of electromagnetic relays, electric relays or electronic relays.

[0007] Based on the above technical solution, the maximum current of the K1 relay is 30A, and the maximum current of the K2 relay and the K4 relay is 800A.

[0008] On the basis of the above technical solution, the R2 shunt is a slot-type shunt or a non-slot-type shunt, and the rated voltage drop of the R2 shunt is 45mv.

[0009] On the basis of the above technical solution, the R1 start-up and discharge resistor is a linear or nonlinear resistor.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] Compared with the prior art, the electrical testing device for a small-power fuel cell test bench in the utility model meets the electrical testing needs of small fuel cell testing and can evaluate key performance indicators such as output power, energy conversion efficiency, stability and response time of small fuel cells, record the performance change patterns of the fuel cell under different working conditions, and provide a basis for optimizing operating parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an electrical testing device for a small-power battery stack test bench in an embodiment of the utility model.

[0013] In the figure: 1- positive terminal, 2- negative terminal, 3- current sensor, 4- K1 relay, 5- online insulation tester, 6- voltage sensor, 7- K2 relay, 8- K3 relay, 9- start-leak resistor, 10- K4 relay, 11- DC ammeter, 12- R2 shunt, 13- load positive terminal, 14- load negative terminal, 15- electronic load. DETAILED DESCRIPTION

[0014] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0015] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0016] 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 connection; it can be a mechanical connection or an electrical connection; 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.

[0017] See Figure 1 The figure shows a schematic diagram of the structure of an electrical test device for a small-power battery stack test bench in an embodiment of the utility model, including a positive terminal 1, a negative terminal 2, a load positive terminal 13 and a load negative terminal 14, wherein the two ends of the positive terminal 1 are respectively connected to the positive pole of an external power source and the load positive terminal 13, and the two ends of the negative terminal 2 are respectively connected to the negative pole of an external power source load and the load negative terminal 14, wherein a K2 relay 7 and an R2 shunt 12 are connected in series between the positive terminal 1 and the load positive terminal 13, and a K4 relay 10 is connected in series between the negative terminal 2 and the load negative terminal 14.

[0018] Among them, the positive terminal 1, the negative terminal 2, the load positive terminal 13 and the load negative terminal 14 are spring-type, plate hook-type or patch-type fixed terminal terminals. In order to further ensure safety and stability, the positive terminal 1 and the negative terminal 2 can be selected as welding terminal terminals and sealant can be poured at the wiring port to achieve waterproof and heat insulation effects, avoid loose wiring or water and dust interference, and improve electrical safety.

[0019] The load positive terminal 13 and the load negative terminal 14 are connected to the electronic load 15, the electronic load 15 is connected in parallel with the online insulation tester 5, the voltage sensor 6 and the R1 start-and-leak resistor 9, the online insulation tester 5 is connected in series with the K1 relay 4, and the R1 start-and-leak resistor 9 is connected in series with the K3 relay 8; wherein the R2 shunt 12 is also connected in parallel with the DC ammeter 11.

[0020] In this embodiment, the switch device selection control is that K1 relay 4, K2 relay 7, K3 relay 8, K4 relay 10 are one or a combination of electromagnetic relays, electric relays or electronic relays. Alternatively, all switch devices can be further controlled to be single-pole switches according to the cost control principle.

[0021] According to the demand and performance requirements of the electrical appliances used, the maximum current of K1 relay 4 in this application is 30A, and the maximum current of K2 relay 7 and K4 relay 10 is 800A, ensuring the maximum cost savings in building the stack electrical test bench.

[0022] The DC ammeter 11 and the external R2 shunt 12 can realize the measurement of the main line current and voltage and the detection of power fluctuation. Furthermore, in this embodiment, the R2 shunt 12 is a slot-type shunt or a non-slot-type shunt, and the rated voltage drop of the R2 shunt 12 is 45mv.

[0023] The size of the R1 start-up and discharge resistor 9 is designed and matched according to the test requirements. The resistance value of the linear discharge resistor changes linearly with the current. The R1 start-up and discharge resistor 9 is a linear or non-linear resistor. The non-linear discharge resistor has a more flexible resistance change value. In this embodiment, it can be selected and called according to the test requirements or usage conditions to adapt to the changing needs.

[0024] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. An electrical test device for a low-power battery stack test bench, characterized in that: The invention comprises a positive terminal (1), a negative terminal (2), a load positive terminal (13) and a load negative terminal (14), wherein two ends of the positive terminal (1) are respectively connected to the positive pole of an external power source and the load positive terminal (13), and two ends of the negative terminal (2) are respectively connected to the negative pole of an external power source, the load, and the load negative terminal (14), wherein a K2 relay (7) and an R2 shunt (12) are connected in series between the positive terminal (1) and the load positive terminal (13), a K4 relay (10) is connected in series between the negative terminal (2) and the load negative terminal (14), the load positive terminal (13) and the load negative terminal (14) are connected in series to an electronic load (15), the electronic load (15) is connected in parallel to an online insulation tester (5), a voltage sensor (6) and an R1 start-and-leak resistor (9), the online insulation tester (5) is connected in series to a K1 relay (4), and the R1 start-and-leak resistor (9) is connected in series to a K3 relay (8); wherein the R2 shunt (12) is also connected in parallel to a DC ammeter (11).

2. The electrical test device for a low-power fuel cell test bench according to claim 1, characterized in that: The K1 relay (4), K2 relay (7), K3 relay (8), and K4 relay (10) are one or a combination of electromagnetic relays, electric relays, or electronic relays.

3. The electrical test device for a low-power fuel cell test bench according to claim 1, characterized in that: The maximum current of the K1 relay (4) is 30A, and the maximum current of the K2 relay (7) and the K4 relay (10) is 800A.

4. The electrical test device for a low-power fuel cell test bench according to claim 1, characterized in that: The R2 shunt (12) is a slot-type shunt or a non-slot-type shunt, and the rated voltage drop of the R2 shunt (12) is 45 mv.

5. The electrical test device for a low-power fuel cell test bench according to claim 1, characterized in that: The R1 start-up and discharge resistor (9) is a linear or non-linear resistor.

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