A current detection and control system for a high-power energy storage inverter

Abstract

The present invention discloses a current detection and control system for a high-power energy storage inverter, comprising a shell, a connecting pipe is fixedly connected to the lower surface of the shell, a detection box is fixedly installed on the lower surface of the connecting pipe, a detection resistor is fixedly installed on the inner surface of the shell, long slide grooves are arranged on both sides of the inner bottom surface of the shell, the inner surface of the long slide grooves is slidably connected to a mounting plate, an insulating push plate is fixedly connected to the lower surface of the mounting plate, the upper surface of the insulating push plate is slidably connected to the lower end of the long slide groove, a tightening spring is fixedly connected to the outer surface of the mounting plate, the outer surface of the tightening spring is fixedly connected to the inner two side surfaces of the shell, a conductive block is fixedly connected to the inner surface of the mounting plate, and the detection box is installed in combination with a connecting pipe with a switch, which is beneficial for detection and control after connection, so that the convenience and stability of use can be greatly improved, and safety and efficiency can be ensured.

Description

Technical Field

[0001] The present invention relates to the field of inverter detection, and more specifically, to a current detection control system for a high-power energy storage inverter. Background Art

[0002] In the field of energy storage inverters, when the energy storage battery is charging or discharging, the current of the energy storage battery needs to be accurately controlled. Especially when charging control, battery current detection is more important. Generally, there are two methods for battery current detection. One detection method is to use a single precision power small resistor to detect the current, and the other is to use a single Hall current sensor to detect the current. The most commonly used method is to detect through parallel resistors.

[0003] However, the existing detection and control device is not only inconvenient for installing and positioning the resistor, but also not conducive to connecting to the circuit of the inverter, resulting in poor connection and detection convenience. In addition, different resistor specifications are used for different detection requirements. The existing system is not conducive to positioning and connecting different resistors, has poor adaptability, and is not conducive to detection. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a current detection and control system for a high-power energy storage inverter. By slidingly connecting the mounting plates on both sides of the shell, and then connecting the detection resistor in combination with the wire block, the installation can be clamped and fixed, which is convenient and stable. At the same time, the connecting wires with connectors are extended to the outside, which is convenient and stable to be connected in parallel to the inverter circuit. The detection box is installed in combination with a connecting tube with a switch, which is convenient for detection and control after connection. This can greatly improve the convenience and stability of use and ensure safety and efficiency.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A current detection and control system for a high-power energy storage inverter comprises a shell, a connecting tube is fixedly connected to the lower surface of the shell, a detection box is fixedly installed on the lower surface of the connecting tube, a detection resistor is fixedly installed on the inner surface of the shell, long slide grooves are provided on both sides of the inner bottom surface of the shell, the inner surface of the long slide grooves is slidably connected to a mounting plate, an insulating push plate is fixedly connected to the lower surface of the mounting plate, the upper surface of the insulating push plate is slidably connected to the lower end of the long slide groove, a tightening spring is fixedly connected to the outer surface of the mounting plate, the outer surface of the tightening spring is fixedly connected to the inner two side surfaces of the shell, and a conductive block is fixedly connected to the inner surface of the mounting plate.

[0007] Furthermore, an arc-shaped connecting groove is provided on the outer surface of the conductive block, and the inner surface of the arc-shaped connecting groove is pressed and connected to the two ends of the surface of the detection resistor. By setting the arc-shaped connecting groove outside the conductive block, the detection resistor can be clamped and positioned, and the circuit can be connected at the same time, which is convenient, stable and highly adaptable.

[0008] Furthermore, a connecting wire is fixedly connected to the outer surface of the conductive block, and a connecting head is fixedly connected to the outer end of the connecting wire. By connecting the connecting wires with the connecting head in parallel, it is convenient, efficient and easy to operate.

[0009] Furthermore, the outer surface of the connecting wire is slidably connected to the two ends of the outer surface of the shell through the through hole. The connecting wire is slidably installed through the through hole, and can be slidably extended and retracted to avoid interference, which is convenient for operation.

[0010] Furthermore, an intermediate wire is fixedly connected to the inner surface of the conductive block, and a switch is fixedly connected to the other end of the intermediate wire. Connecting the switch through the intermediate wire is beneficial to control and convenient for detection.

[0011] Furthermore, the other end of the switch is fixedly connected to a parallel wire, and the other end of the parallel wire is fixedly connected to the inside of the detection box. The switch and the parallel wire are both located on the inner surface of the connecting tube. The detection box is installed through the switch box and the parallel wire, so that the circuit can be detected and controlled safely and efficiently.

[0012] Furthermore, a cover plate is hinged on the upper surface of the shell, and the other end of the cover plate is clamped to the inner surface of the shell through an elastic clamp. The hinged cover plate structure can be used to position the detection resistor to avoid it from falling out, which is safe and stable.

[0013] Furthermore, there are two mounting plates and insulating push plates, which are symmetrically connected to the two ends of the shell. The two mounting plates can be clamped and connected from both ends to ensure stability and circuit connection effect.

[0014] Furthermore, the interior of the detection box includes an interface module, a current sensing circuit, a reference source circuit, a voltage-frequency conversion module and a counting module. The interface module is connected in series with the current sensing circuit and the reference source circuit through a circuit, and the reference source circuit is connected in series with the voltage-frequency conversion module and the counting module through a circuit. The current and voltage of the circuit can be detected through a plurality of module structures, which is convenient for control, stable and efficient.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) This solution connects the mounting plate by sliding it on both sides of the shell, and then connects the detection resistor in combination with the wire block. It can be clamped and fixed for installation, which is convenient and stable. At the same time, the connecting wire with a connector is extended to the outside, which is convenient for parallel connection to the inverter circuit, which is convenient and stable.

[0017] (2) By setting an arc-shaped connection groove outside the conductive block, the detection resistor can be clamped and positioned, and the circuit can be connected at the same time, which is convenient, stable and highly adaptable.

[0018] (3) By connecting the connecting wires with connectors in parallel, it is convenient to connect to the inverter circuit, which is convenient, efficient and easy to operate.

[0019] (4) The connecting wires are installed by sliding through the through holes, which can slide and retract to avoid interference and facilitate operation.

[0020] (5) Connecting the switch through an intermediate wire facilitates control and detection.

[0021] (6) By installing a detection box in parallel with the switch box, the circuit can be detected and controlled safely and efficiently.

[0022] (7) The hinged cover structure can be used to position the detection resistor to prevent it from falling out, ensuring safety and stability.

[0023] (8) The current and voltage of the circuit can be detected through multiple module structures, which is convenient for control, stable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal partial structure of the housing of the present invention;

[0026] Figure 3 For the present invention Figure 1 Enlarged view of point A where the middle switch is connected;

[0027] Figure 4 This is a block diagram of the internal principles of the detection box of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1 housing, 11 connecting pipe, 12 detection box, 13 detection resistor, 14 long slide groove, 15 mounting plate, 16 insulating push plate, 17 tightening spring, 18 conductive block, 19 arc-shaped connecting groove, 2 connecting wires, 21 connector, 22 middle wires, 23 switch, 24 parallel wires, 25 cover plate, 26 elastic clamp. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-4 , a high-power energy storage inverter current detection control system, including a housing 1, see Figure 1 and Figure 2 The lower surface of the shell 1 is fixedly connected with a connecting pipe 11, and a detection box 12 is fixedly installed on the lower surface of the connecting pipe 11. A detection resistor 13 is fixedly installed on the inner surface of the shell 1, which can be connected in parallel to the circuit of the inverter, and then measured externally without completely disassembling the inverter and exposing the internal components. It is convenient, efficient, safe and stable. Long slide grooves 14 are provided on both sides of the inner bottom surface of the shell 1. The inner surface of the long slide groove 14 is slidably connected to the mounting plate 15. The lower surface of the mounting plate 15 is fixedly connected with an insulating push plate 16, which can cover the long slide groove 14 to improve safety. The upper surface of the insulating push plate 16 slides Connected to the lower end of the long slide groove 14, the outer surface of the mounting plate 15 is fixedly connected with a tightening spring 17, the outer surface of the tightening spring 17 is fixedly connected to the inner two side surfaces of the shell 1, and the inner surface of the mounting plate 15 is fixedly connected with a conductive block 18. The mounting plate 15 is tightened by the tightening spring 17, so that the conductive block 18 can be pressed to the two ends of the detection resistor 13, which can clamp and position the detection resistor 13, which is more convenient, and can be connected to the circuit with high efficiency and stability. The outer surface of the conductive block 18 is provided with an arc-shaped connecting groove 19, and the inner surface of the arc-shaped connecting groove 19 is pressed and connected to the two ends of the surface of the detection resistor 13.

[0032] See also Figure 1 and Figure 3The outer surface of the conductive block 18 is fixedly connected with a connecting wire 2, and the outer end of the connecting wire 2 is fixedly connected with a connecting head 21, and the circuit can be connected through the connecting head 21. At the same time, the connecting wire 2 can slide and retract, and will not interfere with the mounting plate 15, which is convenient for connection and use. The inner surface of the conductive block 18 is fixedly connected with an intermediate wire 22, and the other end of the intermediate wire 22 is fixedly connected with a switch 23. Through the switch control, the detection box 12 and the detection resistor 13 can be connected in parallel, and then the voltage and current can be detected, which is convenient for control, convenient and efficient. The other end of the switch 23 is fixedly connected with a parallel wire 24, and the other end of the parallel wire 24 is fixedly connected to the inside of the detection box 12. The switch 23 and the parallel wire 24 are both located on the inner surface of the connecting tube 11. The upper surface of the shell 1 is hinged with a cover plate 25, and the other end of the cover plate 25 is clamped on the inner surface of the shell 1 through an elastic clamp 26. It is reset through the cover plate 25, and then the inside and outside are isolated, which is convenient for use and stable according to installation.

[0033] See also Figure 1 and Figure 4 The interior of the detection box 12 includes an interface module, a current sensing circuit, a reference source circuit, a voltage-frequency conversion module and a counting module. Both ends of the interface module are connected to two parallel wires 24. The interface module is connected in series with a current sensing circuit and a reference source circuit through a circuit. The detection output of the induced voltage Vsence with the current information of the load Mp to be detected is input to the reference source circuit. The reference source circuit is connected in series with a voltage-frequency conversion module and a counting module through a circuit. The voltage-frequency conversion module converts the detection voltage VPTAT and the reference voltage into a frequency, and the counting module includes two sets of binary synchronous adder counters for counting the frequency output by the voltage-frequency conversion module, and calculating the current of the load Mp to be detected through the count value.

[0034] When in use, the cover 25 can be opened and the detection resistor 13 can be placed inside the shell 1, so that the tightening spring 17 presses the mounting plate 15, and then the conductive block 18 can be pressed against the two ends of the detection resistor 13, so that the detection resistor 13 can be clamped and positioned, which is more convenient, and can be connected to the circuit at the same time, which is efficient and stable, and then the cover 25 can be closed for protection, and then the two connectors 21 can be connected to the detection end of the inverter circuit, so that the detection resistor 13 can be connected in parallel to the inverter circuit by connecting the wire 2, and the switch 23 can be closed to connect the detection box 12 to the two ends of the detection resistor 13, and then the detection resistor 13 can be detected, and then the circuit voltage of the inverter circuit can be detected and controlled, which is convenient to operate, safe and stable.

[0035] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-power energy storage inverter current detection and control system, comprising a housing (1), characterized in that: The lower surface of the shell (1) is fixedly connected to a connecting tube (11), the lower surface of the connecting tube (11) is fixedly mounted with a detection box (12), the inner surface of the shell (1) is fixedly mounted with a detection resistor (13), both sides of the inner bottom surface of the shell (1) are provided with long slide grooves (14), the inner surface of the long slide groove (14) is slidably connected to a mounting plate (15), the lower surface of the mounting plate (15) is fixedly connected to an insulating push plate (16), the upper surface of the insulating push plate (16) is slidably connected to the lower end of the long slide groove (14), the outer surface of the mounting plate (15) is fixedly connected to a tightening spring (17), the outer surface of the tightening spring (17) is fixedly connected to the shell ( 1), the inner surface of the mounting plate (15) is fixedly connected to a conductive block (18), the outer surface of the conductive block (18) is provided with an arc-shaped connecting groove (19), the inner surface of the arc-shaped connecting groove (19) is pressed and connected to the two ends of the surface of the detection resistor (13), the outer surface of the conductive block (18) is fixedly connected to a connecting wire (2), the outer end of the connecting wire (2) is fixedly connected to a connecting head (21), the outer surface of the connecting wire (2) is slidably connected to the two ends of the outer surface of the housing (1) through a through hole, the inner surface of the conductive block (18) is fixedly connected to an intermediate wire (22), and the other end of the intermediate wire (22) is fixedly connected to a switch (23).

2. A high-power energy storage inverter current detection and control system according to claim 1, characterized in that: The other end of the switch (23) is fixedly connected to a parallel wire (24), and the other end of the parallel wire (24) is fixedly connected to the inside of the detection box (12). The switch (23) and the parallel wire (24) are both located on the inner surface of the connecting tube (11).

3. A high-power energy storage inverter current detection and control system according to claim 1, characterized in that: A cover plate (25) is hingedly connected to the upper surface of the shell (1), and the other end of the cover plate (25) is clamped to the inner surface of the shell (1) via an elastic clamp (26).

4. A high-power energy storage inverter current detection and control system according to claim 1, characterized in that: There are two mounting plates (15) and two insulating push plates (16), which are symmetrically connected to the two ends of the housing (1).

5. A high-power energy storage inverter current detection and control system according to claim 1, characterized in that: The detection box (12) comprises an interface module, a current sensing circuit, a reference source circuit, a voltage-frequency conversion module and a counting module. The interface module is connected in series with the current sensing circuit and the reference source circuit via a circuit. The reference source circuit is connected in series with the voltage-frequency conversion module and the counting module via a circuit.

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