Direct-current power supply system, method and device

Abstract

The embodiment of the invention provides a direct current power supply system which comprises a silicon rectification generator used for converting mechanical energy of an engine into electric energy, and the silicon rectification generator is a special silicon rectification generator for vehicle-mounted equipment; the energy storage device is arranged in parallel with the silicon rectification generator and is used for reducing output voltage ripples of the silicon rectification generator; the first DC / DC power conversion circuit is used for converting the output of the rectification generator into stable direct current output; the second DC / DC power conversion circuit is arranged in parallel with the first DC / DC power conversion circuit and is used for converting the output of the storage battery pack into stable direct current output; the storage battery pack is used for providing short-time reserve energy when the silicon rectification generator has no output; and the charging circuit comprises a charger and is used for charging and supplementing energy for the storage battery pack to realize the long-term power supply capability of the power supply system. The system can improve the output characteristics of the silicon rectification generator, can improve the output characteristics of a power supply system, and can increase an uninterrupted power supply function.

Description

Technical Field

[0001] The embodiments of this specification relate to the technical field of generators, and in particular to a direct current power supply system, method and device. Background Art

[0002] In the vehicle information system, due to the limitations of chassis space, load capacity and other conditions, a silicon rectifier generator driven by the chassis engine is required as a power supply method.

[0003] Silicon rectifier generators have the advantages of small size, light weight, and high power density, and can meet the restrictions on volume and weight. However, due to the characteristics of the silicon rectifier generator voltage regulation circuit, it has the inherent disadvantage of slow transient response. When the load changes or the engine speed changes, the output voltage will have a large overshoot, causing large voltage fluctuations.

[0004] When a silicon rectifier generator is connected in parallel with a lead-acid battery for power supply, the power supply voltage fluctuates over a large range and cannot provide high-quality power supply. The silicon rectifier generator does not have the ability to directly provide stable, high-quality power supply to vehicle-mounted equipment. In extreme cases, such as accidental engine shutdown, the silicon rectifier generator cannot provide stable power supply to vehicle-mounted equipment.

[0005] In view of this, how to enable the silicon rectifier generator to provide stable power supply for vehicle-mounted equipment has become a technical problem that urgently needs to be solved. Summary of the invention

[0006] In view of this, the embodiments of this specification provide a DC power supply system. One or more embodiments of this specification also relate to a DC power supply method and a DC power supply device to solve the technical defect that the silicon rectifier generator in the prior art cannot provide stable power supply for vehicle-mounted equipment.

[0007] According to a first aspect of an embodiment of this specification, a DC power supply system is provided, including:

[0008] A silicon rectifier generator, used to convert the mechanical energy of the engine into electrical energy, wherein the silicon rectifier generator is a silicon rectifier generator dedicated to vehicle-mounted equipment;

[0009] An energy storage device, arranged in parallel with the silicon rectifier generator, for reducing the output voltage ripple of the silicon rectifier generator;

[0010] A first DC / DC power conversion circuit, used for converting the output of the rectifier generator into a stable DC output;

[0011] A second DC / DC power conversion circuit is arranged in parallel with the first DC / DC power conversion circuit and is used to convert the output of the battery pack into a stable DC output;

[0012] The battery pack is used to provide short-term reserve energy when the silicon rectifier generator has no output;

[0013] The charging circuit, including a charger, is used to charge and replenish the battery pack to achieve the long-term power supply capability of the power supply system.

[0014] Optionally, the first DC / DC power conversion circuit and / or the second DC / DC power conversion circuit is an isolated DC / DC power conversion circuit, which is used to perform electrical isolation between the silicon rectifier generator and the vehicle-mounted equipment.

[0015] According to a second aspect of an embodiment of this specification, a direct current power supply method is provided, including:

[0016] According to the initial parameters of the vehicle-mounted equipment, the rated output power of the silicon rectifier generator is determined, wherein when the generator is at idle speed, the output power of the silicon rectifier generator meets the power demand of the vehicle-mounted equipment, and the initial parameters carry the power demand of the vehicle-mounted equipment, the DC / DC power conversion circuit, and the chassis generator idle speed;

[0017] Determine the parameters of energy storage devices based on the power demand of on-board equipment and the real-time parameters of silicon rectifier generators;

[0018] Based on the power demand of the vehicle-mounted equipment, determine a first DC / DC power conversion circuit and a second DC / DC power conversion circuit;

[0019] Based on the power demand of the vehicle-mounted equipment and according to the battery pack discharge rate, the battery pack parameters are determined, wherein the battery pack parameters include the battery pack capacity and the charging current limit;

[0020] determining a charging circuit based on the battery pack capacity and the charging current limit;

[0021] A DC power supply system is formed based on the rated output power, the parameters of the energy storage device, the first DC / DC power conversion circuit, the second DC / DC power conversion circuit, the parameters of the battery pack and the charging circuit.

[0022] According to a third aspect of an embodiment of this specification, a DC power supply device is provided, including:

[0023] The first determination module is configured to determine the rated output power of the installed silicon rectifier generator according to the initial parameters of the vehicle-mounted equipment, wherein when the generator is at idle speed, the output power of the silicon rectifier generator meets the power demand of the vehicle-mounted equipment, and the initial parameters carry the power demand of the vehicle-mounted equipment, the DC / DC power conversion circuit, and the chassis generator idle speed;

[0024] The second determination module is configured to determine the parameters of the energy storage device based on the power demand of the vehicle-mounted equipment and the real-time parameters of the silicon rectifier generator;

[0025] A third determination module is configured to determine a first DC / DC power conversion circuit and a second DC / DC power conversion circuit based on the power demand of the vehicle-mounted device;

[0026] A fourth determination module is configured to determine battery pack parameters based on the power demand of the vehicle-mounted equipment and according to the battery pack discharge rate, wherein the battery pack parameters include the battery pack capacity and the charging current limit;

[0027] a fifth determination module, configured to determine a charging circuit based on the battery pack capacity and the charging current limit;

[0028] The component module is configured to form a DC power supply system based on the rated output power, the energy storage device parameters, the first DC / DC power conversion circuit, the second DC / DC power conversion circuit, the battery pack parameters and the charging circuit.

[0029] An embodiment of the present specification provides a DC power supply system, including: a silicon rectifier generator, which is used to convert the mechanical energy of an engine into electrical energy, wherein the silicon rectifier generator is a silicon rectifier generator dedicated to vehicle-mounted equipment; an energy storage device, which is arranged in parallel with the silicon rectifier generator, and is used to reduce the output voltage ripple of the silicon rectifier generator; a first DC / DC power conversion circuit, which is used to convert the output of the rectifier generator into a stable DC output; a second DC / DC power conversion circuit, which is arranged in parallel with the first DC / DC power conversion circuit, and is used to convert the output of a battery pack into a stable DC output; a battery pack, which is used to provide short-term reserve energy when the silicon rectifier generator has no output; a charging circuit, including a charger, which is used to charge and replenish the battery pack to achieve the long-term power supply capability of the power supply system.

[0030] Specifically, the DC power supply system can improve the output characteristics of the silicon rectifier generator on the one hand: by adding an additional device, the negative electrode of the vehicle-mounted equipment is prevented from being grounded through the negative electrode of the chassis silicon rectifier generator to introduce interference; at the same time, when the chassis silicon rectifier generator is shared, the impact of chassis equipment start and stop operations on the power supply of the vehicle-mounted equipment is avoided; by appropriately increasing the rated output power of the silicon rectifier generator, the output characteristics of the silicon rectifier generator are improved, especially the output power under idling conditions, to meet the power demand of the vehicle-mounted equipment; and energy storage devices (such as supercapacitors, etc.) are added to improve the transient response characteristics of the silicon rectifier generator.

[0031] On the other hand, the output characteristics of the power supply system can be improved: DC / DC power conversion circuits are used to power on-board equipment, eliminating the impact of large voltage fluctuations and poor dynamic response of silicon rectifier generators, and making full use of the better output performance of DC / DC power conversion circuits, such as more accurate supply voltage, smaller load effect, smaller source effect, smaller ripple, noise, and better transient response characteristics, to provide stable and high-quality power supply for on-board equipment. If the system requirements are higher, the DC / DC power conversion circuit can be designed as an isolated DC / DC power conversion circuit to achieve electrical isolation between the silicon rectifier generator and the on-board equipment, and improve the anti-interference ability of the power supply system.

[0032] On the other hand, the uninterrupted power supply function can be increased: a battery pack is added to input the DC / DC power conversion circuit 2, and a battery pack is added to realize the function of DC regulated power supply under the condition of battery input; the outputs of the DC / DC power conversion circuit 1 input by the silicon rectifier generator and the DC / DC power conversion circuit 2 input by the battery are designed in parallel, and the normal operation of any one of the two converters can ensure stable DC output; the two converters work together to realize the stable and uninterrupted power supply function of the power supply system in extreme cases such as accidental shutdown of the chassis engine; a charging circuit is added to the silicon rectifier generator input to realize battery charging (under the condition of silicon generator input) to ensure that the power supply system has the ability to provide long-term continuous power supply when the engine is temporarily shut down. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of a structural block diagram of a DC power supply system provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of a flow chart of a DC power supply method provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of energy flow in a normal state of a silicon rectifier generator in a DC power supply method provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of energy flow in a low-normal state of a silicon rectifier generator in a DC power supply method provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of power supply energy flow when a silicon rectifier generator stops normally in a DC power supply method provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the structure of a DC power supply device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0040] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0041] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0042] In addition, it should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in one or more embodiments of this specification are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0043] In this specification, a DC power supply method is provided. This specification also relates to a DC power supply device, a computing device, and a computer-readable storage medium, which are described in detail one by one in the following embodiments.

[0044] See also Figure 1 , Figure 1 A schematic diagram of a structural block diagram of a DC power supply system provided in an embodiment of the present application.

[0045] like Figure 1As shown, the DC power supply system includes: a silicon rectifier generator 101, an energy storage device 102, a first DC / DC power conversion circuit 103, a second DC / DC power conversion circuit 104, a battery pack 105 and a charging circuit 106.

[0046] Specifically, the silicon rectifier generator 101 is used to convert the mechanical energy of the engine into electrical energy, wherein the silicon rectifier generator is a silicon rectifier generator dedicated to vehicle-mounted equipment.

[0047] The energy storage device 102 is arranged in parallel with the silicon rectifier generator to reduce the output voltage ripple of the silicon rectifier generator.

[0048] The first DC / DC power conversion circuit 103 is used to convert the output of the rectifier generator into a stable DC output.

[0049] In the embodiment of the present application, by providing an energy storage device and a DC / DC power conversion circuit 1 in a silicon rectifier generator power supply system, a high-quality DC power supply function using the silicon rectifier generator as energy is achieved.

[0050] The second DC / DC power conversion circuit 104 is arranged in parallel with the first DC / DC power conversion circuit, and is used to convert the output of the battery pack into a stable DC output.

[0051] The battery pack 105 is used to provide short-term reserve energy when the silicon rectifier generator has no output.

[0052] In the embodiment of the present application, a DC / DC power conversion circuit 2 and a battery pack are provided to realize a DC uninterruptible power supply function.

[0053] The charging circuit 106 includes a charger for charging the battery pack to provide energy for long-term power supply of the power supply system.

[0054] In the embodiment of the present application, by providing a charger, the long-term power supply function of the power supply system is achieved, and the uninterrupted function will not be lost due to battery energy exhaustion.

[0055] In an embodiment of the present application, the first DC / DC power conversion circuit and / or the second DC / DC power conversion circuit are isolated DC / DC power conversion circuits, which are used to perform electrical isolation between the silicon rectifier generator and the vehicle-mounted equipment.

[0056] Through the coordinated work of various parts of the power supply system, the silicon rectifier generator is used as the energy source to provide high-quality DC uninterrupted power supply to the on-board equipment, ensuring the reliable operation of the on-board equipment.

[0057] Table 1 Power supply system composition

[0058]

[0059] See also Figure 2 , Figure 2 A schematic diagram of a DC power supply method provided in an embodiment of the present application. Figure 2 As shown, the specific steps include the following steps.

[0060] Step S202: According to the initial parameters of the vehicle-mounted equipment, the rated output power of the silicon rectifier generator is determined, wherein when the generator is at idle speed, the output power of the silicon rectifier generator meets the power demand of the vehicle-mounted equipment, and the initial parameters carry the power demand of the vehicle-mounted equipment, the DC / DC power conversion circuit, and the chassis generator idle speed. In actual application, according to the power demand of the vehicle-mounted equipment, the DC / DC power conversion circuit, the chassis engine idle speed and other parameters, the rated output power of the silicon rectifier generator is determined. If conditions permit, it should be ensured that the derated output power of the silicon rectifier generator meets the power demand of the vehicle-mounted equipment when the engine is idle, and the mounting bracket and the transmission wheel system (including tensioners, belts, etc.) are designed.

[0061] Step S204: Determine the parameters of the energy storage device based on the power demand of the vehicle-mounted equipment and the real-time parameters of the silicon rectifier generator, wherein the real-time parameters of the silicon rectifier generator include the transient response characteristics of the silicon rectifier generator, the maximum output voltage and other parameters.

[0062] Step S206: Based on the power demand of the vehicle-mounted equipment, determine a first DC / DC power conversion circuit and a second DC / DC power conversion circuit that meet the demand.

[0063] Step S208: Based on the power demand of the vehicle-mounted equipment and in accordance with the battery pack discharge rate, the battery pack parameters are determined, wherein the battery pack parameters include the battery pack capacity and the charging current limit.

[0064] Step S210: Based on the battery pack capacity and the charging current limit, design or select a charging circuit that meets the requirements.

[0065] Step S212: Based on the rated output power, the energy storage device parameters, the first DC / DC power conversion circuit, the second DC / DC power conversion circuit, the battery pack parameters and the charging circuit, a DC power supply system is constructed. In actual application, the coordination of various installation and electrical parameters is reviewed.

[0066] See also Figure 3 , Figure 3 A schematic diagram of energy flow in a normal state of a silicon rectifier generator in a DC power supply method provided in an embodiment of the present application.

[0067] like Figure 3As shown, the silicon rectifier generator is in normal power supply state. At this time: the silicon rectifier generator provides DC / DC power conversion circuit 1 input to power the vehicle-mounted equipment; provides charging circuit input to intelligently charge the battery pack, replenishes power when power is low, and stops when full; DC / DC power conversion circuit 2 does not provide energy output.

[0068] See also Figure 4 , Figure 4 A schematic diagram of energy flow in a low-normal state of a silicon rectifier generator in a DC power supply method provided in an embodiment of the present application.

[0069] like Figure 4 As shown, the silicon rectifier generator has low power generation due to low engine speed and other reasons, and cannot be powered independently. At this time: the silicon rectifier generator provides input to the DC / DC power conversion circuit 1 to provide part of the power supply energy for the vehicle-mounted equipment; the charging circuit detects that the output voltage of the silicon rectifier generator is reduced and stops charging; the DC / DC power conversion circuit 2 uses the battery pack to provide part of the energy output to supplement the energy demand of the vehicle-mounted equipment.

[0070] See also Figure 5 , Figure 5 A schematic diagram of power supply energy flow when a silicon rectifier generator abnormally shuts down in a DC power supply method provided in an embodiment of the present application.

[0071] like Figure 5 As shown, the silicon rectifier generator cannot generate electricity due to engine shutdown and other reasons, and cannot supply power: the battery pack can be used to power the vehicle-mounted equipment for a short time. At this time: the DC / DC power conversion circuit 1 input does not provide energy output; the charging circuit detects that the output voltage of the silicon rectifier generator is reduced and stops charging; the DC / DC power conversion circuit 2 uses the battery pack to provide full energy output to power the vehicle-mounted equipment.

[0072] By using the embodiments of the present application, the output characteristics of the silicon rectifier generator are improved: by adopting an additional installation method, the negative pole of the vehicle-mounted equipment is prevented from being grounded through the negative pole of the chassis silicon rectifier generator to introduce interference; at the same time, when the chassis silicon rectifier generator is shared, the influence of chassis equipment start and stop operations on the power supply of the vehicle-mounted equipment is avoided; by appropriately increasing the rated output power of the silicon rectifier generator, the output characteristics of the silicon rectifier generator are improved, especially the output power under idling conditions, to meet the power demand of the vehicle-mounted equipment; and energy storage devices (such as supercapacitors, etc.) are added to improve the transient response characteristics of the silicon rectifier generator.

[0073] Improve the output characteristics of the power supply system: Use DC / DC power conversion circuits to power onboard equipment, eliminate the impact of large voltage fluctuations and poor dynamic response of silicon rectifier generators, and make full use of the better output performance of DC / DC power conversion circuits, such as more accurate power supply voltage, smaller load effect, smaller source effect, smaller ripple, noise, and better transient response characteristics, to provide stable and high-quality power supply for onboard equipment. If the system requirements are higher, the DC / DC power conversion circuit can be designed as an isolated DC / DC power conversion circuit to achieve electrical isolation between the silicon rectifier generator and the onboard equipment, and improve the anti-interference ability of the power supply system.

[0074] Increase the uninterruptible power supply function: add a battery pack input DC / DC power conversion circuit 2, add a battery pack, and realize the function of DC regulated power supply under the condition of battery input; the output of the DC / DC power conversion circuit 1 input by the silicon rectifier generator and the DC / DC power conversion circuit 2 input by the battery adopts a parallel design, and the normal operation of any one of the two converters can ensure stable DC output; the two converters work together to realize the stable and uninterrupted power supply function of the power supply system in extreme cases such as accidental shutdown of the chassis engine; add a charging circuit input by the silicon rectifier generator to realize battery charging (under the condition of silicon generator input), and ensure that the power supply system has the ability to provide long-term continuous power supply when the engine is temporarily shut down.

[0075] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the DC power supply method, since it is basically similar to the DC power supply system embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the DC power supply system embodiment.

[0076] Corresponding to the above method embodiment, this specification also provides a DC power supply device embodiment, Figure 6 This is a schematic diagram of the structure of a DC power supply device provided in an embodiment of the present application. Figure 6 As shown, the device comprises:

[0077] The first determination module 602 is configured to determine the rated output power of the installed silicon rectifier generator according to the initial parameters of the vehicle-mounted device, wherein when the generator is at idle speed, the output power of the silicon rectifier generator meets the power demand of the vehicle-mounted device, and the initial parameters carry the power demand of the vehicle-mounted device, the DC / DC power conversion circuit, and the chassis generator idle speed;

[0078] The second determination module 604 determines the parameters of the energy storage device based on the power demand of the vehicle-mounted equipment and the real-time parameters of the silicon rectifier generator;

[0079] A third determination module 606 determines a first DC / DC power conversion circuit and a second DC / DC power conversion circuit based on the power demand of the vehicle-mounted equipment;

[0080] The fourth determination module 608 determines the battery pack parameters based on the power demand of the vehicle-mounted equipment and the battery pack discharge rate, wherein the battery pack parameters include the battery pack capacity and the charging current limit;

[0081] A fifth determination module 610, determining a charging circuit based on the battery pack capacity and the charging current limit;

[0082] The forming module 612 forms a DC power supply system based on the rated output power, the energy storage device parameters, the first DC / DC power conversion circuit, the second DC / DC power conversion circuit, the battery pack parameters and the charging circuit.

[0083] By applying the embodiments of the present application, the output characteristics of the silicon rectifier generator can be improved; the output characteristics of the power supply system can be improved; and the uninterruptible power supply function can be added.

[0084] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the DC power supply device, since it is basically similar to the DC power supply method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the DC power supply method embodiment.

[0085] It should be noted that the above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of the present specification.

[0086] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A DC power supply system, characterized in that: include: A silicon rectifier generator, used to convert the mechanical energy of the engine into electrical energy, wherein the silicon rectifier generator is a silicon rectifier generator dedicated to vehicle-mounted equipment; An energy storage device, arranged in parallel with the silicon rectifier generator, for reducing the output voltage ripple of the silicon rectifier generator; A first DC / DC power conversion circuit, used for converting the output of the rectifier generator into a stable DC output; A second DC / DC power conversion circuit is arranged in parallel with the first DC / DC power conversion circuit and is used to convert the output of the battery pack into a stable DC output; The battery pack is used to provide short-term reserve energy when the silicon rectifier generator has no output; The charging circuit, including a charger, is used to charge and replenish the battery pack to achieve the long-term power supply capability of the power supply system.

2. The DC power supply system according to claim 1, characterized in that: The first DC / DC power conversion circuit and / or the second DC / DC power conversion circuit are isolated DC / DC power conversion circuits, which are used to perform electrical isolation between the silicon rectifier generator and the vehicle-mounted equipment.

3. A DC power supply method, characterized in that: include: According to the initial parameters of the vehicle-mounted equipment, the rated output power of the silicon rectifier generator is determined, wherein when the generator is at idle speed, the output power of the silicon rectifier generator meets the power demand of the vehicle-mounted equipment, and the initial parameters carry the power demand of the vehicle-mounted equipment, the DC / DC power conversion circuit, and the chassis generator idle speed; Determine the parameters of energy storage devices based on the power demand of on-board equipment and the real-time parameters of silicon rectifier generators; Based on the power demand of the vehicle-mounted equipment, determine a first DC / DC power conversion circuit and a second DC / DC power conversion circuit; Based on the power demand of the vehicle-mounted equipment and according to the battery pack discharge rate, the battery pack parameters are determined, wherein the battery pack parameters include the battery pack capacity and the charging current limit; determining a charging circuit based on the battery pack capacity and the charging current limit; A DC power supply system is formed based on the rated output power, the parameters of the energy storage device, the first DC / DC power conversion circuit, the second DC / DC power conversion circuit, the parameters of the battery pack and the charging circuit.

4. A DC power supply device, characterized in that: include: The first determination module is configured to determine the rated output power of the installed silicon rectifier generator according to the initial parameters of the vehicle-mounted equipment, wherein when the generator is at idle speed, the output power of the silicon rectifier generator meets the power demand of the vehicle-mounted equipment, and the initial parameters carry the power demand of the vehicle-mounted equipment, the DC / DC power conversion circuit, and the chassis generator idle speed; The second determination module is configured to determine the parameters of the energy storage device based on the power demand of the vehicle-mounted equipment and the real-time parameters of the silicon rectifier generator; A third determination module is configured to determine a first DC / DC power conversion circuit and a second DC / DC power conversion circuit based on the power demand of the vehicle-mounted device; A fourth determination module is configured to determine battery pack parameters based on the power demand of the vehicle-mounted equipment and according to the battery pack discharge rate, wherein the battery pack parameters include the battery pack capacity and the charging current limit; a fifth determination module configured to determine a charging circuit based on the battery pack capacity and the charging current limit; The component module is configured to form a DC power supply system based on the rated output power, the energy storage device parameters, the first DC / DC power conversion circuit, the second DC / DC power conversion circuit, the battery pack parameters and the charging circuit.

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