Lightning protection structure of photovoltaic energy storage power supply PCB

Abstract

The utility model relates to the technical field of photovoltaic energy storage power supply PCB protection, and discloses a lightning protection structure of a photovoltaic energy storage power supply PCB, which comprises a PCB body, a power supply input port and a power supply output port are arranged on the side edge of the top of the PCB body, a surge protector I is arranged on the back of the power supply input port, and a surge protector II is arranged on the back of the power supply output port. The back of the output port is provided with a second surge protector, the top of the PCB body is provided with a metal shielding cover, the four corners of the metal shielding cover are connected with the PCB body in a matched mode through adaptive screws, and the side edge of the top of the PCB body is provided with a first felling-knife-shaped discharging assembly and a second felling-knife-shaped discharging assembly. According to the photovoltaic energy storage power supply PCB, the safety of the overall structure is effectively guaranteed through the surge protector, the felling knife-shaped discharge assemblies and the metal shielding cover which are arranged at the top, and the photovoltaic energy storage power supply PCB body is prevented from being damaged by lightning strokes, so that the service life of the photovoltaic energy storage power supply PCB is prolonged, and the service life of the photovoltaic energy storage power supply PCB is prolonged. And the energy storage safety of the photovoltaic energy storage power supply is ensured.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic energy storage power supply PCB board protection technology, specifically a lightning protection structure for photovoltaic energy storage power supply PCB board. Background Technology

[0002] With the widespread application of photovoltaic energy storage technology in the renewable energy field, the requirements for stability and safety of photovoltaic energy storage power systems are becoming increasingly stringent. However, the surge overvoltage and electromagnetic pulse generated by lightning strikes can pose a serious threat to sensitive electronic components on the PCB board of photovoltaic energy storage power supplies. On the one hand, surge overvoltages may cause chips, capacitors, resistors and other components on the PCB board to break down instantly, causing short circuits or open circuit faults, which directly affect the normal operation of the power system. On the other hand, the electromagnetic pulse generated by lightning strikes can interfere with the signal transmission lines on the PCB board through electromagnetic coupling, leading to data transmission errors or even system collapse.

[0003] Currently, traditional lightning protection structures suffer from insufficient protection capabilities and slow response speed when dealing with complex and ever-changing lightning environments. To address this, we propose a lightning protection structure for photovoltaic energy storage power supply PCB boards. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a lightning protection structure for photovoltaic energy storage power supply PCB boards, thus solving the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a lightning protection structure for a photovoltaic energy storage power supply PCB board, comprising a PCB board body, a power input port and an output port on the top side of the PCB board body, a surge protector I on the back of the power input port, a surge protector II on the back of the output port, and a metal shielding cover on the top of the PCB board body, the four corners of the metal shielding cover being connected to the PCB board body by adapter screws, and a valve-shaped discharge component I and a valve-shaped discharge component II on the top side of the PCB board body, the valve-shaped discharge component I and the valve-shaped discharge component II being axially symmetrically distributed.

[0008] Preferably, the surge protector one and the surge protector two have the same structure, and the surge protector one is any one of a varistor or a transient suppression diode assembly.

[0009] Preferably, the metal shielding cover has an overall inverted hollow rectangular box structure. The four corners of the bottom of the metal shielding cover have connection holes. The connection holes are connected to the top of the PCB board body by matching screws. The core components are covered inside the metal shielding cover and are connected to the top of the PCB board body.

[0010] Preferably, the metal shield is made of either copper or aluminum.

[0011] Preferably, the first valve-shaped discharge component and the second valve-shaped discharge component have the same structure. The first valve-shaped discharge component consists of two parts: a grounding ring and a power receiving end. The power receiving end is provided inside the grounding ring. The bottom of the power receiving end is connected to the internal circuit of the PCB board body. The top of the power receiving end is provided with a vertical discharge tip and a horizontal discharge tip.

[0012] Preferably, the power lines and signal lines inside the PCB board body are arranged in a non-parallel manner, and the power lines adopt a serpentine winding design.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a lightning protection structure for a photovoltaic energy storage power supply PCB board, which has the following beneficial effects:

[0015] 1. The photovoltaic energy storage power supply PCB board features a comprehensive and efficient lightning protection structure. Surge protector 1 and surge protector 2 limit and discharge surge overvoltages from both the power input and output ends. A metal shield resists electromagnetic pulse interference, and valve-shaped discharge components 1 and 2 assist in discharging overvoltages. The reasonable arrangement of power lines and signal lines reduces electromagnetic interference. Multiple components work together to form a three-dimensional protection for the PCB board, greatly reducing the risk of lightning strikes to the PCB board and its core components, and ensuring the stable operation of the photovoltaic energy storage power supply system.

[0016] 2. The lightning protection structure of this photovoltaic energy storage power supply PCB board is scientifically and rationally designed. The metal shielding cover is made of copper or aluminum, which not only has good shielding performance but also meets different cost and performance requirements. The first and second valve-shaped discharge components are located on the side of the PCB board body, without affecting other components on the board. The serpentine winding design of the power cord cleverly utilizes the inductive characteristics. These designs ensure the lightning protection effect while taking into account the structural layout and overall performance of the PCB board, thus improving the practicality and reliability of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the PCB board structure of the photovoltaic energy storage power supply of this utility model;

[0018] Figure 2This is a cross-sectional schematic diagram of the PCB board of the photovoltaic energy storage power supply of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the valve-shaped discharge assembly of this utility model.

[0020] In the diagram: 1. PCB board body; 2. Power input port; 3. Surge protector one; 4. Metal shield; 5. Valve-shaped discharge assembly one; 6. Valve-shaped discharge assembly two; 7. Output port; 8. Surge protector two; 9. Connection hole; 10. Core components; 11. Grounding ring; 12. Power connection terminal; 13. Vertical discharge tip; 14. Horizontal discharge tip. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 A lightning protection structure for a photovoltaic energy storage power supply PCB board includes a PCB board body 1. The top side of the PCB board body 1 is provided with a power input port 2 and an output port 7. A surge protector 3 is provided on the back of the power input port 2, and a surge protector 8 is provided on the back of the output port 7. A metal shielding cover 4 is provided on the top of the PCB board body 1. The four corners of the metal shielding cover 4 are connected to the PCB board body 1 by adapter screws. A valve-shaped discharge component 5 and a valve-shaped discharge component 6 are provided on the top side of the PCB board body 1. The valve-shaped discharge component 5 and the valve-shaped discharge component 6 are axially symmetrically distributed.

[0023] Furthermore, surge protector 3 and surge protector 8 have the same structure. Surge protector 3 can be either a varistor or a transient suppression diode. The varistor exhibits high resistance under normal voltage. When the instantaneous overvoltage generated by lightning exceeds its threshold, the resistance value drops rapidly, limiting the overvoltage to a certain range and discharging the lightning current to the ground. The transient suppression diode can respond to transient overvoltage more quickly, effectively protecting subsequent circuit components from damage caused by lightning surges.

[0024] Furthermore, the metal shielding cover 4 has an overall inverted hollow rectangular box structure. The four corners of the bottom of the metal shielding cover 4 are provided with connection holes 9. The connection holes 9 are connected to the top of the PCB board body 1 by matching screws. The core component 10 is covered inside the metal shielding cover 4 and is connected to the top of the PCB board body 1. The metal shielding cover 4 shields the core component 10 on the PCB board body 1 to prevent electromagnetic pulses generated by lightning from interfering with and damaging it.

[0025] Furthermore, the metal shield 4 can be made of either copper or aluminum. Both copper and aluminum have excellent conductivity and electromagnetic shielding properties, which can effectively block the propagation of electromagnetic waves and have a good shielding effect against high-frequency electromagnetic interference.

[0026] Furthermore, the structure of the first valve-shaped discharge assembly 5 and the second valve-shaped discharge assembly 6 is the same. The first valve-shaped discharge assembly 5 consists of two parts: a grounding ring 11 and a power receiving terminal 12. The power receiving terminal 12 is located inside the grounding ring 11. The bottom of the power receiving terminal 12 is connected to the internal circuit of the PCB board body 1. The top of the power receiving terminal 12 is provided with a vertical discharge tip 13 and a horizontal discharge tip 14. When the overvoltage generated by the lightning strike exceeds a certain value, the air is broken down in the discharge gap of the first valve-shaped discharge assembly 5, forming an arc discharge to discharge the overvoltage. The first valve-shaped discharge assembly 5 and the second valve-shaped discharge assembly 6 are located on the side of the PCB board body 1 and will not damage the components on the top of the PCB board body 1.

[0027] Furthermore, the power lines and signal lines inside the PCB board body 1 are arranged in a non-parallel manner, and the power lines adopt a serpentine bend design. The non-parallel arrangement of the power lines and signal lines can effectively reduce electromagnetic interference. The serpentine bend design of the power lines forms an equivalent inductance, which hinders the voltage changes caused by lightning surges, allowing the fluctuating voltage to be released slowly.

[0028] Structural Description:

[0029] PCB board body 1: PCB board body 1 is the basic carrier of the entire lightning protection structure. It has a power input port 2 and an output port 7 on the top and side. The top is covered with a metal shield 4. The side is arranged with valve-shaped discharge components 1 5 and 2 6. The interior adopts a special wiring design to carry the core components 10.

[0030] Power input port 2: Power input port 2 is located on the top side of PCB board body 1. It serves as a power input channel. Surge protector 3 is fixed on the back to introduce external power into the PCB board and provide the first line of lightning protection.

[0031] Surge protector 3: Surge protector 3 is installed on the back of power input port 2. It can be a varistor or transient suppression diode assembly. It has high resistance under normal voltage and rapidly reduces resistance under overvoltage to limit voltage and discharge lightning current.

[0032] Metal shield 4: The metal shield 4 is an inverted hollow rectangular box. The four corners are connected to the PCB board body 1 by adapter screws, completely covering the core components 10. It is made of copper or aluminum and shields against lightning electromagnetic pulse interference.

[0033] Valve-shaped discharge component 5: Valve-shaped discharge component 5 is arranged on the side of the PCB board body 1, and consists of a grounding ring 11 and a power connection terminal 12. The bottom of the power connection terminal 12 is connected to the internal circuit, and the top has a vertical discharge tip 13 and a horizontal discharge tip 14. When overvoltage occurs, it breaks down and discharges air.

[0034] Valve-shaped discharge component 26: Valve-shaped discharge component 26 is symmetrically distributed with component 15 and has the same structure. The two work together to assist in current discharge during lightning overvoltage and do not affect other components on the PCB board.

[0035] Output port 7: Output port 7 is located on the top side of the PCB board body 1 and serves as a power output interface. It is connected to surge protector 8 on the back to ensure stable power output and protection from lightning surge damage.

[0036] Surge protector 28: Surge protector 28 has the same structure as surge protector 13. It is installed on the back of output port 7 to provide overvoltage protection for output current and ensure the safe operation of downstream equipment.

[0037] Connection hole 9: Connection hole 9 is opened at the four bottom corners of the metal shield 4 and is connected to the top of the PCB board body 1 by means of adapter screws;

[0038] Core component 10: Core component 10 is installed on the top of the PCB board body 1 and is completely covered and protected by the metal shield 4. It is the key to the realization of the photovoltaic energy storage power supply function and must be protected from lightning strikes to avoid performance damage.

[0039] Grounding ring 11: Grounding ring 11 is a component of the valve-shaped discharge assembly. It internally houses the power receiving terminal 12 and forms a discharge gap with the power receiving terminal 12. It works with the discharge tip to complete the arc discharge during overvoltage.

[0040] Power terminal 12: The bottom of the power terminal 12 is connected to the internal circuit of the PCB board body 1, and the top is provided with a vertical discharge tip 13 and a horizontal discharge tip 14, which together with the grounding ring 11 form a valve-shaped discharge assembly to realize current conduction and discharge.

[0041] Vertical discharge tip 13: The vertical discharge tip 13 is located at the top of the power receiving terminal 12 and cooperates with the horizontal discharge tip 14. When lightning overvoltage occurs, the air between the tip 13 and the grounding ring 11 is broken down to form a discharge path.

[0042] Horizontal discharge tip 14: The horizontal discharge tip 14 is installed on the top of the power terminal 12 and together with the vertical discharge tip 13, it forms a discharge structure and forms a gap with the grounding ring 11 to help discharge lightning overvoltage.

[0043] Working Principle: Following the diagram, correctly install the lightning protection structure of the photovoltaic energy storage power supply PCB board. When a lightning strike occurs, the surge overvoltage first enters the PCB board body 1 through the power input port 2. At this time, the surge protector 3 on the back of the power input port 2 responds quickly. If surge protector 3 is a varistor, it exhibits high resistance under normal voltage. However, when the lightning overvoltage exceeds the threshold, the resistance value rapidly decreases, limiting the overvoltage to a certain range and guiding the lightning current to the ground. If it is a transient suppression diode, its extremely fast response speed can clamp the overvoltage instantly, protecting subsequent circuit components. The surge protector 8 on the back of the output port 7 works similarly, ensuring the safety of the output equipment. The metal shielding cover 4 covers... The core component 10, which is placed on top of the PCB board body 1, utilizes its excellent conductivity and electromagnetic shielding performance to block electromagnetic pulses generated by lightning strikes, preventing them from interfering with or damaging the core component 10. The first valve-shaped discharge component 5 and the second valve-shaped discharge component 6 are symmetrically distributed on the side of the PCB board body 1. When the overvoltage reaches a certain level, the air in the discharge gap between the power terminal 12 and the grounding ring 11 is broken down, forming an arc discharge to discharge the overvoltage. In addition, the power lines and signal lines inside the PCB board body 1 are not arranged in parallel to reduce electromagnetic interference, and the serpentine bend design of the power lines forms an equivalent inductance, which hinders the change of lightning surge voltage and allows the voltage to be released slowly, providing all-round protection for the PCB board.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightning protection structure for a photovoltaic energy storage power supply PCB board, comprising a PCB board body (1), characterized in that: The PCB board body (1) has a power input port (2) and an output port (7) on its top side. A surge protector (3) is provided on the back of the power input port (2), and a surge protector (8) is provided on the back of the output port (7). A metal shield (4) is provided on the top of the PCB board body (1). The four corners of the metal shield (4) are connected to the PCB board body (1) by matching screws. A valve-shaped discharge assembly (5) and a valve-shaped discharge assembly (6) are provided on the top side of the PCB board body (1). The valve-shaped discharge assembly (5) and the valve-shaped discharge assembly (6) are symmetrically distributed.

2. The lightning protection structure for a photovoltaic energy storage power supply PCB board according to claim 1, characterized in that: The surge protector one (3) has the same structure as the surge protector two (8), and the surge protector one (3) can be any one of a varistor or a transient suppression diode assembly.

3. The lightning protection structure for a photovoltaic energy storage power supply PCB board according to claim 1, characterized in that: The metal shield (4) is an inverted hollow rectangular box structure. The metal shield (4) has four connecting holes (9) at the bottom corners. The connecting holes (9) are connected to the top of the PCB board body (1) by matching screws. The metal shield (4) covers the core components (10) and the core components (10) are connected to the top of the PCB board body (1).

4. The lightning protection structure for a photovoltaic energy storage power supply PCB board according to claim 3, characterized in that: The metal shield (4) can be made of either copper or aluminum.

5. The lightning protection structure for a photovoltaic energy storage power supply PCB board according to claim 1, characterized in that: The structure of the first (5) of the valve-shaped discharge assembly is the same as that of the second (6). The first (5) of the valve-shaped discharge assembly consists of two parts, namely a grounding ring (11) and a power receiving end (12). The power receiving end (12) is provided inside the grounding ring (11). The bottom of the power receiving end (12) is connected to the internal circuit of the PCB board body (1). The top of the power receiving end (12) is provided with a vertical discharge tip (13) and a horizontal discharge tip (14).

6. The lightning protection structure for a photovoltaic energy storage power supply PCB board according to claim 5, characterized in that: The power lines and signal lines inside the PCB board body (1) are arranged in a non-parallel manner, and the power lines adopt a serpentine bend design.

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