A boost power supply module

Abstract

The utility model discloses a kind of boost power module, including anti-reverse connection circuit, boost filter branch and lightning protection circuit, the input end of anti-reverse connection circuit is communicated with power input end, the output end of anti-reverse connection circuit is communicated with boost filter branch and temperature control module, and boost filter branch and temperature control module are independently operated, the output end of boost filter branch is communicated with the input end of lightning protection circuit, the output end of lightning protection circuit is communicated with power output end.The utility model has the beneficial effect that: after 24V DC power supply is input in power input end, high-frequency noise is filtered out first by boost filter branch, then 24V is boosted to 36V or 48V and then filtered, finally output to power supply for rear stage equipment, while lightning protection circuit is added between boost filter branch and power output end, so as to prevent lightning pulse on line from damaging device and each module, and also protect rear stage equipment from pulse current generated in power supply system.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and in particular to a boost power supply module. Background Technology

[0002] Communication vehicles typically provide 24V DC power, but an increasing number of communication devices use 36V or 48V DC power. Therefore, vehicles need to boost the 24V DC power supply to 36V or 48V DC output. Traditional DC boost power modules are small in size and lack their own heat dissipation, resulting in low power output. They also require external filtering circuits to control ripple noise and lack surge protection, necessitating the addition of external surge protection circuits. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a boost power supply module.

[0004] The purpose of this utility model is achieved through the following technical solution: a boost power supply module, including a reverse connection protection circuit, a boost filter branch, and a surge protection circuit. The input terminal of the reverse connection protection circuit is connected to the power input terminal, and the output terminal of the reverse connection protection circuit is connected to the boost filter branch and the temperature control module. The boost filter branch and the temperature control module operate independently of each other. The output terminal of the boost filter branch is connected to the input terminal of the surge protection circuit, and the output terminal of the surge protection circuit is connected to the power output terminal.

[0005] Preferably, there are two boost filter branches.

[0006] Preferably, the boost filter branch includes an input filter circuit, the input terminal of which is connected to the output terminal of the reverse connection protection circuit, the output terminal of which is connected to the input terminal of the boost module, the output terminal of the boost module is connected to the input terminal of the output filter circuit, and the output terminal of the output filter circuit is connected to the input terminal of the lightning protection circuit.

[0007] Preferably, the boost module is also connected to the voltage regulation circuit.

[0008] Preferably, a current sharing circuit is provided between the two boost modules.

[0009] This utility model has the following advantages: After a 24V DC power supply is input to the power input terminal, the high-frequency noise is first filtered out by the boost filter branch, and then the 24V is boosted to 36V or 48V and filtered again before being output to power the downstream equipment. At the same time, a surge protection circuit is added between the boost filter branch and the power output terminal to prevent lightning pulses on the line from damaging the devices and modules, and to protect the downstream equipment from damage caused by pulse currents generated inside the power system. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the boost power supply module.

[0011] Figure 2 This is a schematic diagram of the circuit principle of a boost power supply module;

[0012] Figure 3 This is a schematic diagram of the boost module circuit principle;

[0013] In the diagram, 1-Power input terminal, 2-Reverse connection protection circuit, 3-Temperature control module, 4-Input filter circuit, 5-Boost filter branch, 6-Current sharing circuit, 7-Boost module, 8-Voltage adjustment circuit, 9-Output filter circuit, 10-Surge protection circuit, 11-Power output terminal. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this embodiment, as Figure 1 and Figure 2As shown, a boost power supply module includes a reverse connection protection circuit 2, a boost filter branch 5, and a surge protection circuit 10. The input terminal of the reverse connection protection circuit 2 is connected to the power input terminal 1, and the output terminal of the reverse connection protection circuit 2 is connected to the boost filter branch 5 and the temperature control module 3, which operate independently. The output terminal of the boost filter branch 5 is connected to the input terminal of the surge protection circuit 10, and the output terminal of the surge protection circuit 10 is connected to the power output terminal 11. After a 24V DC power supply is input to the power input terminal 1, high-frequency noise is first filtered out by the boost filter branch 5, then the 24V is boosted to 36V or 48V and filtered again before being output to power downstream devices. A surge protection circuit 10 is added between the boost filter branch 5 and the power output terminal 11 to prevent lightning pulses from damaging devices and modules, and also to protect downstream devices from damage caused by pulse currents generated within the power system. In this embodiment, the reverse connection protection circuit 2 includes a diode D1. That is, a 100A high-power diode D1 is connected in series with the positive terminal of the power input terminal 1 to prevent reverse connection. During normal power supply, it does not affect the power supply of the module. When the input is reversed, the high reverse breakdown voltage of the diode can prevent the reverse current from entering the subsequent power module. The surge protection circuit 10 uses a BTVS module between the positive and negative terminals for line-to-line protection. The BTVS contains a high-power transient diode with a tripping device, which can withstand 15kA of induced lightning strikes. After the surge pulse exceeds the withstand value, the transient diode can be tripped to prevent short circuit. To mitigate the risks of combustion and fire, a high-voltage gas discharge tube (GDT1) is used between the negative electrode and ground to ensure lightning protection while meeting DC withstand voltage requirements. The temperature control module 3 controls the fan's start and stop. The fan is controlled by the temperature control switch S1. When the temperature reaches the set value, the fan automatically turns on to dissipate heat, thus using the fan to cool the power module and ensure that the module can operate at full load for a long time. The fan is waterproof, and the heat dissipation cavity is isolated from the main circuit cavity. The two cavities are connected by a through-core capacitor lead to isolate electromagnetic interference generated by the operation of electromechanical components, achieving the electromagnetic shielding and waterproof requirements of the main circuit cavity.

[0021] Furthermore, there are two boost filter branches 5. Even further, each boost filter branch 5 includes an input filter circuit 4. The input terminal of the input filter circuit 4 is connected to the output terminal of the reverse connection protection circuit 2, and the output terminal of the input filter circuit 4 is connected to the input terminal of the boost module 7. The output terminal of the boost module 7 is connected to the input terminal of the output filter circuit 9, and the output terminal of the output filter circuit 9 is connected to the input terminal of the surge protection circuit 10. Preferably, a current sharing circuit 6 is provided between the two boost modules 7. Specifically, the input filter circuit 4 consists of capacitors C1~C10 and inductors L1~L4. Each branch has five capacitors and two inductors, forming a low-pass filter circuit that filters out high-frequency noise from the power input, preventing damage to the power module. A fuse F1 or F2 is connected in series before the input stage to prevent short circuits in the subsequent stages from burning out the circuitry and components. The circuit of the boost module 7 is as follows: Figure 3 As shown, two boost modules 7 are connected in parallel to obtain greater output power, and the two boost modules 7 are connected by a current sharing circuit 6 to avoid uneven output current between the two boost modules 7, which could lead to overheating of a single module; the output filter circuit 9 consists of capacitors C27~C33 and inductors L5 and L6, which form a low-pass filter circuit through capacitors and inductors, which can filter out high-frequency noise in the power supply output, improve the power supply output quality, and prevent damage to downstream electrical equipment.

[0022] In this embodiment, the boost module 7 is also connected to the voltage adjustment circuit 8. Specifically, the voltage value output by the boost module 7 is adjusted by changing the resistance value of resistor R1.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A boost power supply module, characterized in that: It includes a reverse connection protection circuit (2), a boost filter branch (5), and a surge protection circuit (10). The input terminal of the reverse connection protection circuit (2) is connected to the power input terminal (1). The output terminal of the reverse connection protection circuit (2) is connected to the boost filter branch (5) and the temperature control module (3). The boost filter branch (5) and the temperature control module (3) operate independently of each other. The output terminal of the boost filter branch (5) is connected to the input terminal of the surge protection circuit (10). The output terminal of the surge protection circuit (10) is connected to the power output terminal (11).

2. The boost power supply module according to claim 1, characterized in that: There are two boost filter branches (5).

3. The boost power supply module according to claim 2, characterized in that: The boost filter branch (5) includes an input filter circuit (4), the input terminal of which is connected to the output terminal of the reverse connection protection circuit (2), the output terminal of which is connected to the input terminal of the boost module (7), the output terminal of which is connected to the input terminal of the output filter circuit (9), and the output terminal of which is connected to the input terminal of the lightning protection circuit (10).

4. The boost power supply module according to claim 3, characterized in that: The boost module (7) is also connected to the voltage adjustment circuit (8).

5. The boost power supply module according to claim 4, characterized in that: A current sharing circuit (6) is provided between the two boost modules (7).

Images