Electrical connection test circuit of battery energy storage vehicle

Abstract

The utility model discloses an electrical connection test circuit of a battery energy storage vehicle, a wire inlet side of the electrical connection test circuit is connected to a power grid through a cable, two wire outlet sides are respectively connected to the tested battery energy storage vehicle through a quick connector, the connector is in a quick plug design, no extra connecting part is needed, and the cost is reduced. Connection debugging work can be carried out outdoors; during testing, one battery energy storage vehicle runs in a charging mode, the other battery energy storage vehicle runs in a discharging mode, after half cycle is finished, the tested battery energy storage vehicle in the charging mode is changed into the discharging mode, the tested battery energy storage vehicle in the discharging mode is changed into the charging mode, and debugging work is carried out in this way. The phenomenon of electric energy countercurrent on the power grid side in the test process is avoided, and the power utilization of enterprises is safer; the wire inlet side of the electrical connection test circuit is also provided with a multifunctional ammeter, which can assist in metering the electric energy loss used in debugging, and helps to calculate the operation efficiency of the energy storage vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing devices, and in particular relates to an electrical connection testing circuit for a battery energy storage vehicle. Background Art

[0002] With the continuous growth of global energy demand and the rapid development of renewable energy, the energy storage industry is gradually becoming an important part of the energy field. As a key technology for energy conversion and storage, energy storage technology can solve the problems of volatility and intermittency of renewable energy, improve energy utilization efficiency, improve energy supply and energy security, reduce dependence on traditional energy, and promote the transformation and upgrading of energy structure. At present, most of the system debugging methods of battery energy storage vehicles are to connect the AC input / output port of the energy storage system to the circuit breaker at the debugging site through a cable, thereby connecting to the mains system, and the debugging personnel remotely control the energy storage inverter to perform charging and discharging debugging operations.

[0003] The defects and deficiencies of the existing technology are as follows: 1. The existing debugging method requires connection to the mains circuit breaker, which makes the original input / output cable quick plug-in unusable. An additional debugging cable needs to be installed with a standard copper nose as a transfer before it can be installed normally. This makes the debugging and installation work relatively complicated and inconvenient. 2. The existing debugging method is to charge and discharge the power grid, which will make the load of the local power grid unstable, making it difficult to control the power factor of the enterprise's internal power grid, and increasing the burden of switching on and off the enterprise's capacitor cabinet. 3. The current capacity and power of a single energy storage system can reach a maximum of 2.5MW / 5MWh. The existing debugging method needs to fully consider the transformer capacity and the enterprise's electricity demand before debugging. The charging debugging cannot be greater than the transformer capacity, otherwise the transformer load will be too large and cause damage; the discharging debugging cannot be greater than the enterprise's electricity demand, otherwise it will return electricity to the power grid. This makes it impossible for multiple energy storage systems to perform charging / discharging debugging at the same time, and the debugging efficiency is low. Utility Model Content

[0004] The utility model provides an electrical connection test circuit for a battery energy storage vehicle, which can solve the defects and shortcomings of the prior art.

[0005] To solve the above problems, the technical solutions provided by the present invention are as follows:

[0006] The utility model provides an electrical connection test circuit for a battery energy storage vehicle, comprising a first molded case circuit breaker (1QF), wherein an access electrical leakage terminal of the first molded case circuit breaker (1QF) is electrically connected to a power grid through a copper bus and an incoming cable; a current transformer is sleeved on the copper bus connected to the access electrical leakage terminal of the first molded case circuit breaker (1QF), and the current transformer is electrically connected to a multi-function electric meter through a wire;

[0007] The output electrical leakage terminal of the first molded case circuit breaker (1QF) is electrically connected to the second molded case circuit breaker (1QF1), the third molded case circuit breaker (1QF2) and the fourth molded case circuit breaker (1QF3) through copper bars, and the second molded case circuit breaker (1QF1) and the third molded case circuit breaker (1QF2) are electrically connected to the No. 1 battery energy storage vehicle and the No. 2 battery energy storage vehicle under test through two copper bars, two outlet cables and two quick connectors respectively;

[0008] The fourth molded case circuit breaker (1QF3) is respectively connected to the first miniature circuit breaker (QF1), the second miniature circuit breaker (QF2), the third miniature circuit breaker (QF3), the fourth miniature circuit breaker (QF4) and the fifth miniature circuit breaker (QF5) through copper bars; the first miniature circuit breaker (QF1), the second miniature circuit breaker (QF2), the third miniature circuit breaker (QF3) and the fourth miniature circuit breaker (QF4) respectively output auxiliary power distribution port 1, auxiliary power distribution port 2, auxiliary power distribution port 3 and auxiliary power distribution port 4 through cables, and the fifth miniature circuit breaker (QF5) is electrically connected to two groups of 5-hole sockets through cables.

[0009] According to an optional embodiment of the utility model, the brand of the first molded case circuit breaker (1QF), the second molded case circuit breaker (1QF1) and the third molded case circuit breaker (1QF2) is Shanghai Liangxin, and its model is NDM3EX-1600M / 4321D / 1250A; the brand of the fourth molded case circuit breaker (1QF3) is Shanghai Liangxin, and its model is NDM3-125C / 4021A / 125A.

[0010] According to an optional embodiment of the utility model, the brand of the first miniature circuit breaker (QF1), the second miniature circuit breaker (QF2), the third miniature circuit breaker (QF3) and the fourth miniature circuit breaker (QF4) are Shanghai Liangxin, and their model numbers are NDB1-63-C63 / 4P; the brand of the fifth miniature circuit breaker (QF5) is Shanghai Liangxin, and its model number is NDB1-63-C16 / 1P.

[0011] According to an optional embodiment of the utility model, the brand of the current transformer is Ankerui, and its model is G-50Ⅱ-1500 / 50.5S; the brand of the multi-function meter is Ankerui, and its model is DTSD1352-2CF.

[0012] Compared with the prior art, the embodiment of the utility model provides an electrical connection test circuit for a battery energy storage vehicle, which has the following beneficial effects:

[0013] (1) The incoming line of the electrical connection test circuit is connected to the power grid using a cable, and the two outgoing lines of the electrical connection test circuit are connected to the two battery energy storage vehicles under test through quick connectors on specially customized cables. The connectors are quick-plug design and do not require additional connection parts. They are plug-and-play. The connectors are waterproof design and can be connected and debugged outdoors.

[0014] (2) During the test, one battery energy storage vehicle operates in charging mode and the other battery energy storage vehicle operates in discharging mode. After half a cycle, the battery energy storage vehicle under test in charging mode is changed to discharging mode, and the battery energy storage vehicle under test in discharging mode is changed to charging mode. In this way, debugging work is carried out. During the test, there will be no reverse flow of electric energy on the grid side, and the company's electricity use will be safer.

[0015] (3) The incoming line side of the electrical connection test circuit mainly plays the role of intermediate regulation of the power grid, bearing the loss part of the test electric energy. The maximum power will not exceed the maximum power of a single energy storage vehicle, reducing the fluctuation of the power grid and the power load to a minimum. A multi-function meter is installed on the incoming line side of the electrical connection test circuit, which can assist in measuring the power loss used for debugging and help calculate the operating efficiency of the energy storage vehicle.

[0016] (4) The electrical connection test circuit is equipped with 4 auxiliary power supply ports and 2 sets of 5-hole sockets to meet the auxiliary power needs of debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 An electrical schematic diagram of an electrical connection test circuit for a battery energy storage vehicle provided in an embodiment of the present application.

[0019] Figure 2 A schematic diagram of 4 auxiliary power distribution ports and 2 groups of 5-hole sockets in an electrical connection test circuit of a battery energy storage vehicle provided in an embodiment of the present application.

[0020] Figure 3 A schematic diagram of a closing indication of a multi-function ammeter and a circuit breaker in an electrical connection test circuit of a battery energy storage vehicle provided in an embodiment of the present application.

[0021] Figure 4 A functional module material table of an electrical connection test circuit for a battery energy storage vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0023] like Figure 1 As shown, an embodiment of the utility model provides an electrical connection test circuit for a battery energy storage vehicle, including a first molded case circuit breaker 1QF, wherein an access electrical leakage terminal of the first molded case circuit breaker 1QF is electrically connected to a power grid through a copper bus and an incoming cable; a current transformer is sleeved on the copper bus to which the access electrical leakage terminal of the first molded case circuit breaker 1QF is connected, and the current transformer is electrically connected to a multi-function electric meter through a wire.

[0024] The output electrical leakage terminal of the first molded case circuit breaker 1QF is electrically connected to the second molded case circuit breaker 1QF1, the third molded case circuit breaker 1QF2 and the fourth molded case circuit breaker 1QF3 through copper bars, and the second molded case circuit breaker 1QF1 and the third molded case circuit breaker 1QF2 are electrically connected to the tested battery energy storage vehicle No. 1 and battery energy storage vehicle No. 2 through 2 copper bars, 2 outgoing cables and 2 quick connectors.

[0025] Figure 2 Combination Figure 1 The fourth molded case circuit breaker 1QF3 is respectively connected to the first miniature circuit breaker QF1, the second miniature circuit breaker QF2, the third miniature circuit breaker QF3, the fourth miniature circuit breaker QF4 and the fifth miniature circuit breaker QF5 through copper bars; the first miniature circuit breaker QF1, the second miniature circuit breaker QF2, the third miniature circuit breaker QF3 and the fourth miniature circuit breaker QF4 are respectively output to the auxiliary distribution port 1, the auxiliary distribution port 2, the auxiliary distribution port 3 and the auxiliary distribution port 4 through cables, and the fifth miniature circuit breaker QF5 is electrically connected to 2 groups of 5-hole sockets (XS21 / XS22) through cables.

[0026] like Figure 3 As shown, the multi-function meter DTSD1352-CFK is electrically connected to four fuses FU1-4 through wires, the multi-function meter DTSD1352-CFK is electrically connected to three current transformers through wires and terminals A401 / B401 / C401 on the wires, and the multi-function meter DTSD1352-CFK is electrically connected to the PE line through wires and terminal N401 on the wires.

[0027] The wire 101 connected to the first molded case circuit breaker 1QF is connected to the main incoming line closing indicator light HL1, the wire 102 connected to the second molded case circuit breaker 1QF1 is connected to the closing indicator light HL2, the wire 103 connected to the third molded case circuit breaker 1QF2 is connected to the closing indicator light HL3, and the wire 104 connected to the fourth molded case circuit breaker 1QF3 is connected to the closing indicator light HL4.

[0028] like Figure 4 As shown, the brand of the first molded case circuit breaker 1QF, the second molded case circuit breaker 1QF1 and the third molded case circuit breaker 1QF2 is Shanghai Liangxin, and its model is NDM3EX-1600M / 4321D / 1250A. The brand of the fourth molded case circuit breaker 1QF3 is Shanghai Liangxin, and its model is NDM3-125C / 4021A / 125A.

[0029] The first miniature circuit breaker QF1, the second miniature circuit breaker QF2, the third miniature circuit breaker QF3 and the fourth miniature circuit breaker QF4 are of the brand Shanghai Liangxin, and their model is NDB1-63-C63 / 4P. The fifth miniature circuit breaker QF5 is of the brand Shanghai Liangxin, and its model is NDB1-63-C16 / 1P.

[0030] The brand of the current transformer is Ankerui, and its model is G-50Ⅱ-1500 / 50.5S. The brand of the multi-function meter is Ankerui, and its model is DTSD1352-2CF.

[0031] The main line input mode of the electrical connection test circuit of a battery energy storage vehicle is 3P4W, using 50×6mm 2 The double copper busbar is connected to a 1250A molded case circuit breaker (the first molded case circuit breaker 1QF), and the internal 2 The double copper busbar is connected to two 1250A molded case circuit breakers (the second molded case circuit breaker 1QF1, the third molded case circuit breaker 1QF2) and one 125A molded case circuit breaker (the fourth molded case circuit breaker 1QF3). The two molded case circuit breakers (the second molded case circuit breaker 1QF1, the third molded case circuit breaker 1QF2) continue to pass through the 50×6mm 2 Double copper busbars are extended and led out, and special outgoing cables are installed. The specification of each outgoing line is 3P4W+PE, and the three-phase live wire is 2×185mm 2 , zero line is 1×185mm 2 , ground wire is 1×185mm 2 , each cable uses a DT185-16 copper nose at one end and an energy storage connector at the other end.

[0032] In the above, the incoming line side of the electrical connection test circuit is connected to the power grid using a cable, and the two outgoing line sides of the electrical connection test circuit are connected to the two battery energy storage vehicles under test through quick connectors on specially customized cables. The connector is a quick-plug design and does not require additional connection parts. It is plug-and-play. The connector is waterproof and can be connected and debugged outdoors.

[0033] The end of the debugging cable of the two-way outlet of the electrical connection test circuit uses an energy storage connector (female head). During debugging, you only need to plug the outlet cable energy storage connector (male head) of the battery energy storage vehicle under test with the energy storage connector (female head). No additional auxiliary materials and tools are required. The energy storage connector is waterproof and can be used outdoors. When testing the two battery energy storage vehicles, one is set to run in charging mode and the other in discharge mode. After half a cycle, the device under test in charging mode is changed to discharge mode, and the device under test in discharge mode is changed to charging mode. In this way, debugging work is carried out. During the test, there will be no reverse flow of electric energy on the grid side, and the company's electricity use will be safer.

[0034] This embodiment uses a pairing method to debug the battery energy storage vehicle. Because two battery energy storage vehicles of the same power are used for pairing, one in charging mode and the other in discharging mode, theoretically, the load on the grid side is only the equipment loss part during the debugging process, the impact on the grid can be minimized, and the power factor of the grid is more stable. The pairing method is used to debug the battery energy storage vehicle, and the load on the grid side is relatively small. The debugging requires a relatively small load on the grid transformer. As long as the transformer can meet the debugging power load of one battery energy storage, it can meet the use of the debugging of two battery energy storage vehicles under the device. 2 battery energy storage vehicles can be used at the same time, which can save 50% of the debugging time. The pairing method is used to debug the battery energy storage vehicle. In theory, the load on the grid side is only the equipment loss part during the debugging process. There is no need to consider the company's power consumption and power return during the debugging process, which can improve the safety of the company's power consumption and the grid side.

[0035] The incoming side of the electrical connection test circuit mainly plays the role of intermediate regulation of the power grid, bears the loss of the test power, and the maximum power will not exceed the maximum power of a single energy storage vehicle, which will minimize the fluctuation of the power grid and the power load. The incoming side of the electrical connection test circuit is equipped with an energy meter, which can assist in measuring the power loss used for debugging and help calculate the operating efficiency of the energy storage vehicle. The electrical connection test circuit is equipped with 4 auxiliary power supply ports and 2 groups of 5-hole sockets to meet the auxiliary power demand for debugging.

[0036] The two outgoing lines of the electrical connection test circuit are equipped with 60M long special cables. The debugging range is centered on the electrical connection test device and has a radius of 60M. No mobile device or equipment under test is required during the debugging process.

[0037] The above are only specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited to this. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present utility model within the spirit and principles of the present utility model should be covered within the protection scope of the present utility model; ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be based on the scope defined by the claims.

Claims

1. An electrical connection test circuit for a battery energy storage vehicle, characterized in that: The invention comprises a first molded case circuit breaker (1QF), wherein an access electric leakage terminal of the first molded case circuit breaker (1QF) is electrically connected to a power grid through a copper busbar and an incoming cable; a current transformer is sleeved on the copper busbar connected to the access electric leakage terminal of the first molded case circuit breaker (1QF), and the current transformer is electrically connected to a multifunctional electric meter through a wire; The output electrical leakage terminal of the first molded case circuit breaker (1QF) is electrically connected to the second molded case circuit breaker (1QF1), the third molded case circuit breaker (1QF2) and the fourth molded case circuit breaker (1QF3) through copper bars, and the second molded case circuit breaker (1QF1) and the third molded case circuit breaker (1QF2) are electrically connected to the No. 1 battery energy storage vehicle and the No. 2 battery energy storage vehicle under test through two copper bars, two outlet cables and two quick connectors respectively; The fourth molded case circuit breaker (1QF3) is respectively connected to the first miniature circuit breaker (QF1), the second miniature circuit breaker (QF2), the third miniature circuit breaker (QF3), the fourth miniature circuit breaker (QF4) and the fifth miniature circuit breaker (QF5) through copper bars; the first miniature circuit breaker (QF1), the second miniature circuit breaker (QF2), the third miniature circuit breaker (QF3) and the fourth miniature circuit breaker (QF4) respectively output auxiliary power distribution port 1, auxiliary power distribution port 2, auxiliary power distribution port 3 and auxiliary power distribution port 4 through cables, and the fifth miniature circuit breaker (QF5) is electrically connected to two groups of 5-hole sockets through cables.

2. An electrical connection test circuit for a battery energy storage vehicle according to claim 1, characterized in that: The brand of the first molded case circuit breaker (1QF), the second molded case circuit breaker (1QF1) and the third molded case circuit breaker (1QF2) is Shanghai Liangxin, and its model is NDM3EX-1600M / 4321D / 1250A; the brand of the fourth molded case circuit breaker (1QF3) is Shanghai Liangxin, and its model is NDM3-125C / 4021A / 125A.

3. The electrical connection test circuit of a battery energy storage vehicle according to claim 1, characterized in that: The brand of the first miniature circuit breaker (QF1), the second miniature circuit breaker (QF2), the third miniature circuit breaker (QF3) and the fourth miniature circuit breaker (QF4) are Shanghai Liangxin, and their model numbers are NDB1-63-C63 / 4P; the brand of the fifth miniature circuit breaker (QF5) is Shanghai Liangxin, and its model number is NDB1-63-C16 / 1P.

4. The electrical connection test circuit of a battery energy storage vehicle according to claim 1, characterized in that: The brand of the current transformer is Ankerui, and its model is G-50Ⅱ-1500 / 50.5S; the brand of the multi-function meter is Ankerui, and its model is DTSD1352-2CF.

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