High-voltage isolation device based on 2000V energy storage system
By setting up an isolation layer and a resistive voltage divider module between the high-voltage side and the low-voltage side, and combining it with an ADC module and an optical/capacitive isolation module, the safety issues of creepage distance and electrical clearance in the 2000V high-voltage energy storage system are solved, thereby improving the stability and reliability of the system and reducing costs.
Patent Information
- Application Number
- CN202423216520.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In 2000V high-voltage energy storage systems, existing isolation schemes are insufficient to meet the safety requirements of creepage distance and electrical clearance, resulting in insufficient stability and reliability of the system under high-voltage conditions, while also incurring high costs.
An isolation layer is set between the high-voltage side and the low-voltage side, and a resistor voltage divider module is connected in series on the high-voltage power supply. Multiple resistors are used to divide the voltage to reduce the voltage. Hardware isolation is achieved by combining ADC module sampling and optical and capacitive isolation modules to reduce creepage distance and electrical clearance.
It effectively reduces creepage distance and clearance, improves system stability and reliability, and reduces costs, enabling safe and stable acquisition of high-voltage power supplies.
Smart Images
Figure CN223680959U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to new energy energy storage technical field, concretely is related to a high voltage isolation device based on 2000V energy storage system. BACKGROUND
[0002] With the continuous expansion of the energy storage market, the voltage of the energy storage system platform gradually increases with market demand. In the energy storage system, the high-voltage system creepage distance, the isolation scheme between the low-voltage side and the high-voltage side, and the voltage and signal acquisition in the high-voltage system mostly use optical, capacitive, and magnetic schemes. However, in higher voltage systems, the optical, magnetic, and capacitive isolation schemes are already difficult to meet the safety requirements of the creepage distance and electrical clearance. For example, in the existing 2000V high-voltage energy storage system, the safe creepage distance is as high as 60mm, which is difficult to achieve in system design. When only using basic isolation schemes, although the cost is significantly reduced, the reliability cannot be guaranteed. This poses a risk in high-demand system environments. SUMMARY
[0003] To address the deficiencies in the prior art, the utility model provides a high-voltage isolation device based on 2000V energy storage system with low cost, high stability, and high reliability.
[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a high-voltage isolation device based on 2000V energy storage system, an isolation layer is arranged between the high-voltage side and the low-voltage side, a resistance voltage division module is connected in series on the high-voltage power supply of the high-voltage side, the resistance voltage division module includes a first sampling resistor and a second sampling resistor, an ADC module is connected across the first sampling resistor and the second sampling resistor, and the other end of the ADC module is connected to the isolation layer.
[0005] The above-mentioned scheme can be seen that the utility model connects the resistance voltage division module in series on the high-voltage power supply, reduces the voltage through the multiple resistors on the resistance voltage division module, and then uses the ADC module for sampling. At this time, the voltage of the sampling part is greatly reduced relative to the total system voltage. In addition, the isolation layer reduces the creepage distance and electrical clearance from the hardware, effectively ensuring the stability and reliability of the system. Furthermore, through verification, the utility model can reduce the creepage distance from 60mm in the prior art to 8mm, reducing the difficulty of strengthening insulation in the high-voltage system and relatively reducing the cost of the system.
[0006] Further, the resistance voltage division module further comprises a first resistance string and a second resistance string, the first resistance string is connected in series at one end of the first sampling resistance, and the second resistance string is connected in series at the other end of the second sampling resistance, the first resistance string is composed of x resistances R1-Rx, and the second resistance string is composed of y resistances Rx+1-Rx+y, wherein x and y are natural numbers greater than or equal to 2. Therefore, by arranging x+y resistances, the high voltage can be effectively reduced at the sampling resistance by using a sufficient number of resistances.
[0007] Further, a first switch is arranged on a path between the first resistance string and the first sampling resistance, a second switch is arranged on a path between the second resistance string and the second sampling resistance, and the first switch and the second switch are connected with the isolation layer signal. Therefore, the first switch and the second switch are controlled by the optical isolation module on the isolation layer, the first switch and the second switch are turned on when sampling is needed, and the first switch and the second switch are turned off when sampling is not needed, so that the automatic access and automatic control of the sampling circuit are realized.
[0008] In addition, the isolation layer comprises two optical isolation modules and at least one capacitive isolation module, the ADC module is connected with the capacitive isolation module, and the first switch and the second switch are connected with the two optical isolation modules respectively. By using the optical isolation module and the capacitive isolation module, the physical hardware isolation and the circuit isolation are met, and the safety and stability of the system are improved.
[0009] More specifically, a 2000V high-voltage power supply is arranged on the high-voltage side, and a low-voltage system acquisition and control device is arranged on the low-voltage side. Therefore, the power supply on the high-voltage side can be safely and stably acquired, and the low-voltage system acquisition and control device on the low-voltage side can process the acquired signal. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 is a schematic diagram of the utility model. DETAILED DESCRIPTION
[0011] As Figure 1 shown, the utility model sets up isolation layer 3 between high-voltage side 1 (2000V high voltage) and low-voltage side 2, and the resistance voltage division module 4 is connected in series on the high-voltage power supply of high-voltage side 1, the resistance voltage division module 4 contains first sampling resistance RA and second sampling resistance RB, two ends of first sampling resistance RA and second sampling resistance RB are connected with ADC module 5, the other end of ADC module 5 is connected with isolation layer 3, and the other side of isolation layer 3 is connected with low-voltage side 2.
[0012] The resistance voltage division module 4 further comprises a first resistance string 41 connected in series at one end of the first sampling resistance RA and a second resistance string 42 connected in series at the other end of the second sampling resistance RB, the first resistance string 41 is composed of x resistances R1-Rx, and the second resistance string 42 is composed of y resistances Rx+1-Rx+y, wherein x and y are both natural numbers greater than or equal to 2. Here, the values of x and y are adjusted in quantity according to the system voltage. A first switch K1 is arranged on the path between the first resistance string 41 and the first sampling resistance RA, and a second switch K2 is arranged on the path between the second resistance string 42 and the second sampling resistance RB, and the first switch K1 and the second switch K2 are both connected with the isolation layer 3.
[0013] The isolation layer 3 comprises two optical isolation modules 31 and one capacitive isolation module 32, the ADC module 5 is connected with the capacitive isolation module 32, and the first switch K1 and the second switch K2 are respectively connected with two optical isolation modules 31. In the embodiment, the optical isolation module and the capacitive isolation module in the isolation layer are both modules applied in the existing isolation layer.
[0014] The high-voltage side 1 is provided with a 2000V high-voltage power supply, and the low-voltage side 2 is provided with a low-voltage system acquisition and control device 21. In the embodiment, the low-voltage system acquisition and control device is an acquisition control module applied in the existing high-voltage system.
[0015] The above only describes the optimal solution embodiment of the utility model, and is not used to limit the utility model. Various modifications or replacements of the utility model made by those skilled in the art without departing from the essence and protection scope of the utility model should be within the protection scope of the utility model.
Claims
1. A high-voltage isolation device based on a 2000V energy storage system, an isolation layer (3) is arranged between a high-voltage side (1) and a low-voltage side (2), characterized in that: A resistance voltage division module (4) is connected in series with the high-voltage power supply on the high-voltage side (1), the resistance voltage division module (4) comprises a first sampling resistor (RA) and a second sampling resistor (RB), both ends of the first sampling resistor (RA) and the second sampling resistor (RB) are connected with an ADC module (5), the other end of the ADC module (5) is connected with the isolation layer (3).
2. The 2000V energy storage system based high voltage isolation device of claim 1, wherein: The resistance voltage division module (4) further comprises a first resistance string (41) connected in series with one end of the first sampling resistor (RA) and a second resistance string (42) connected in series with the other end of the second sampling resistor (RB), the first resistance string (41) is composed of x resistors R1-Rx, the second resistance string (42) is composed of y resistors Rx+1-Rx+y, wherein x and y are both natural numbers greater than or equal to 2.
3. The 2000V energy storage system based high voltage isolation device of claim 2, wherein: A first switch (K1) is arranged on the path between the first resistance string (41) and the first sampling resistor (RA), a second switch (K2) is arranged on the path between the second resistance string (42) and the second sampling resistor (RB), the first switch (K1) and the second switch (K2) are both connected with the isolation layer (3) in signal.
4. The 2000V energy storage system based high voltage isolation device of claim 3, wherein: The isolation layer (3) comprises two optical isolation modules (31) and at least one capacitive isolation module (32), the ADC module (5) is connected with the capacitive isolation module (32), the first switch (K1) and the second switch (K2) are respectively connected with two optical isolation modules (31).
5. The 2000V energy-based system high voltage isolation device of claim 1, wherein: A 2000V high-voltage power supply is arranged on the high-voltage side (1), a low-voltage system acquisition and control device (21) is arranged on the low-voltage side (2).