Intelligent power supply and distribution system for vehicle

Abstract

The invention discloses a vehicle intelligent power supply and distribution system, and relates to the technical field of vehicle power supply. The system comprises a silicon rectification generator, a vehicle chassis storage battery and a comprehensive power supply, wherein the comprehensive power supply internally comprises an intelligent control module; the silicon rectification generator is connected with a vehicle chassis storage battery through a power supply circuit with a one-way conduction element. The input end of the integrated power supply is connected with the silicon rectification generator, and the output end is provided with a plurality of power supply output interfaces with independent on-off control; the intelligent control module comprises a time sequence control unit and a load monitoring unit; the load monitoring unit is used for acquiring load power data of the power output interface, and the time sequence control unit generates a differentiated power-off interval time sequence instruction based on the sequence of the power output interface according to the load power data of the power output interface and executes power-off operation. Extra storage battery packs can be eliminated, the dead weight of the power supply and distribution system is reduced, and the load throwing voltage fluctuation range of the power supply and distribution system is inhibited.

Description

Technical Field

[0001] This invention belongs to the field of power supply technology for special vehicles, specifically an intelligent power supply and distribution system for vehicles. The invention relates to the design of power supply and distribution systems under vehicle driving conditions, particularly a method and device reuse structure for suppressing load dump voltage surges from silicon rectifier generators. Background Technology

[0002] In traditional vehicle power supply and distribution design, to ensure power supply during vehicle operation, a silicon rectifier generator is typically installed in the vehicle chassis and connected to the vehicle's integrated power supply. The integrated power supply then connects to different communication devices through various power output interfaces to power these devices. While this power supply design solves the power supply problem during vehicle operation, it also introduces two issues: first, the silicon rectifier generator requires additional power for excitation and startup; second, the output stability of the silicon rectifier generator is insufficient. Particularly when the vehicle is powered by the silicon rectifier generator, if the integrated power supply is shut down directly, it is equivalent to creating a large instantaneous load shedding on the silicon rectifier generator. In this case, the output voltage of the silicon rectifier generator will increase significantly, potentially burning out the integrated power supply.

[0003] Traditional solutions, considering the impact of the silicon rectifier generator's output current on the connected battery, typically equip the silicon rectifier generator with a separate battery. This battery serves two purposes: first, it provides excitation and startup for the silicon rectifier generator; second, when the output voltage of the silicon rectifier generator increases significantly, it can absorb excess electrical energy, reducing the impact on the overall power supply. However, this introduces the problem of needing to install an additional battery pack in the vehicle, increasing the overall vehicle weight and cost. This issue becomes particularly pronounced when the vehicle has a lot of communication equipment installed, and the overall weight is close to the chassis's load-bearing capacity limit. Summary of the Invention

[0004] In view of this, the present invention proposes an intelligent power supply and distribution system for vehicles. On one hand, the present invention connects a silicon rectifier generator to the vehicle's chassis-mounted battery via a power cable. To avoid affecting the normal operation of the chassis battery, a diode is connected in series in the middle of the power cable, ensuring that current flows unidirectionally from the chassis battery to the silicon rectifier generator, preventing reverse power supply. On the other hand, when the integrated power supply is shut down, the present invention avoids simultaneously de-energizing all output interfaces. Instead, based on the different power consumption of the communication devices connected to the different power output interfaces of the integrated power supply, it automatically selects different time intervals to sequentially disconnect the power output of each power output interface, reducing the instantaneous load dump on the silicon rectifier generator and minimizing the voltage rise of the silicon rectifier generator.

[0005] The technical problem to be solved by this invention is achieved by the following technical solution:

[0006] A vehicle intelligent power supply and distribution system includes: a silicon rectifier generator, a vehicle chassis battery, and an integrated power supply, wherein the integrated power supply contains an intelligent control module.

[0007] The silicon rectifier generator is connected to the vehicle chassis battery via a power supply line with a unidirectional conduction element.

[0008] The input end of the integrated power supply is connected to a silicon rectifier generator, and the output end is equipped with multiple power output interfaces with independent on / off control.

[0009] The intelligent control module includes a timing control unit and a load monitoring unit; wherein, the load monitoring unit is used to acquire the load power data of the power output interface, and the timing control unit generates a differentiated power-off interval timing command based on the power output interface sequence according to the load power data of the power output interface, and executes the power-off operation.

[0010] Furthermore, the unidirectional conducting element is a power diode, with its anode connected to the positive terminal of the vehicle chassis battery and its cathode connected to the output terminal of the silicon rectifier generator.

[0011] Furthermore, the timing control unit performs the power-off operation in the following manner:

[0012] (1) Disconnect each power output interface in sequence according to the preset interface order;

[0013] (2) After disconnecting the nth interface, the (n+1)th interface is disconnected after a buffer time Tn.

[0014] Furthermore, Tn is determined by the load power Pn of the disconnected interface, specifically as follows:

[0015] Tn = a * Pn + b

[0016] Where a is the power time coefficient, ranging from 0.1 to 0.8, in seconds per kW; b is the basic buffer time, ranging from 0.05 to 0.2, in seconds; and Tn is ranging from 0.5 to 5, in seconds. Parameters a and b are obtained by fitting the load dump characteristic curve of the silicon rectifier generator.

[0017] Furthermore, power supply and distribution control is carried out in the following manner:

[0018] Step S1: Collect load power data of each power output interface in real time through the load monitoring unit;

[0019] Step S2: Upon receiving a power-off command, the timing control unit determines the power-off sequence of the interfaces;

[0020] Step S3: Following the interface power-off sequence determined in Step S2, perform the following steps for each interface:

[0021] (1) Disconnect the current power output interface;

[0022] (2) Calculate the buffer time Tn based on the real-time load power Pn of the current power output interface;

[0023] (3) After waiting for Tn time, disconnect the next power output interface.

[0024] Furthermore, the interface power-off sequence determined in step S2 is as follows:

[0025] (1) Connection sequence of the integrated power supply and each power supply output interface;

[0026] or,

[0027] (2) The order of load power Pn of the power output interface from large to small.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. The intelligent power supply and distribution system for vehicles proposed in this invention can solve the problem of excitation and starting power supply of silicon rectifier generators without adding an additional battery pack. At the same time, it can also avoid the influence of silicon rectifier generators on the float charging of the vehicle chassis battery pack.

[0030] 2. This invention can intelligently adapt the interface of silicon rectifier generator and integrated power supply. When the integrated power supply is shut down and load is dumped, it can improve the stability and reliability of the output power of silicon rectifier generator, reduce the impact of load dump on integrated power supply, and improve the operational stability of vehicle power supply and distribution system.

[0031] 3. This invention reduces additional equipment, lowering vehicle cost and weight; simultaneously, it fully utilizes existing vehicle equipment in its design, minimizing space occupation. This invention is particularly suitable for vehicles such as mobile communication vehicles with high requirements for cost control, weight constraints, and space utilization. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the power-off timing of the integrated power supply interface in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] An intelligent power supply and distribution system for vehicles, comprising:

[0035] Silicon rectifier generators, vehicle chassis batteries, integrated power supplies;

[0036] The silicon rectifier generator is connected to the vehicle chassis battery via a power supply line with a unidirectional conduction element.

[0037] The integrated power input terminal is connected to the silicon rectifier generator, and the output terminal is equipped with multiple power output interfaces with independent on / off control, and contains an intelligent control module.

[0038] The intelligent control module includes a timing control unit and a load monitoring unit;

[0039] The load monitoring unit is mainly used to acquire the load power data of the power output interface;

[0040] The timing control unit generates differentiated power-off interval timing commands based on the power output interface sequence, using the load power data from the power output interface.

[0041] The unidirectional conducting element is a power diode, with its anode connected to the positive terminal of the vehicle chassis battery and its cathode connected to the output terminal of the silicon rectifier generator.

[0042] The logic for the timing control unit to perform a power-off operation includes:

[0043] (1) Disconnect each power output interface in sequence according to the preset interface order;

[0044] (2) After disconnecting the nth interface, the buffer time Tn is used to disconnect the (n+1)th interface;

[0045] Wherein, Tn is determined by the load power Pn of the disconnected interface, and the buffer time Tn is calculated as follows:

[0046] Tn = f(Pn)

[0047] The functional relationship f is obtained through historical data modeling and satisfies:

[0048] (1) When Pn > Pm, f(Pn) > f(Pm), where Pn and Pm are the load power of interface n and interface m, respectively;

[0049] (2) The value range of f(Pn) is 0.5-5 seconds.

[0050] In one embodiment, the functional relation f is specifically:

[0051] Tn = a * Pn + b

[0052] Where: a is the power time coefficient (0.1-0.8 s / kW), and b is the basic buffer time (0.05-0.2 s). Parameters a and b are obtained by fitting the load dump characteristic curve of the silicon rectifier generator.

[0053] like Figure 1 As shown, the power supply and distribution control method of the above system includes the following steps:

[0054] Step S1: Collect load power data of each power output interface in real time through the load monitoring unit;

[0055] Step S2: Upon receiving a power-off command, the timing control unit determines the power-off sequence of the interfaces;

[0056] Step S3: Following the order determined in step S2, for each interface, execute:

[0057] (1) Disconnect the current power output interface;

[0058] (2) Calculate the buffer time Tn based on the real-time load power Pn of the interface. The calculation of the buffer time Tn directly depends on the real-time load power data collected in step S1, forming a progressive control chain of "power off - buffer - power off again".

[0059] (3) Wait for Tn and then disconnect the next power output interface.

[0060] The method for determining the interface power-off sequence in step S2 is as follows:

[0061] (1) Connect the power output interfaces of the integrated power supply in the correct order;

[0062] or,

[0063] (2) According to the power output interface load power Pn of the integrated power supply from large to small.

[0064] The silicon rectifier generator of this invention is connected to the chassis battery via a power supply line containing power diodes to achieve excitation start-up. Furthermore, when the integrated power supply is shut down, the intelligent control module performs step-by-step power-off according to a preset interface sequence, waiting for Tn before disconnecting the next interface.

[0065] This invention can eliminate the need for additional battery packs, reduce the weight of the power supply and distribution system, and suppress the voltage fluctuation range of the power supply and distribution system under load.

Claims

1. A vehicle intelligent power supply and distribution system, characterized in that, include: Silicon rectifier generator, vehicle chassis battery, integrated power supply, the integrated power supply contains an intelligent control module; The silicon rectifier generator is connected to the vehicle chassis battery via a power supply line with a unidirectional conduction element. The input end of the integrated power supply is connected to a silicon rectifier generator, and the output end is equipped with multiple power output interfaces with independent on / off control. The intelligent control module includes a timing control unit and a load monitoring unit; wherein, the load monitoring unit is used to acquire the load power data of the power output interface, and the timing control unit generates a differentiated power-off interval timing command based on the power output interface sequence according to the load power data of the power output interface, and executes the power-off operation.

2. The intelligent power supply and distribution system of a vehicle according to claim 1, characterized in that, The unidirectional conducting element is a power diode, with its anode connected to the positive terminal of the vehicle chassis battery and its cathode connected to the output terminal of the silicon rectifier generator.

3. The intelligent power supply and distribution system of claim 1, wherein, The timing control unit performs the power-off operation in the following manner: (1) Disconnect each power output interface in sequence according to the preset interface order; (2) After disconnecting the nth interface, the (n+1)th interface is disconnected after a buffer time Tn.

4. The intelligent power supply and distribution system of claim 3, wherein, Tn is determined by the load power Pn of the disconnected interface, specifically: Tn = a * Pn + b Where a is the power time coefficient, in seconds / kW; b is the basic buffer time, in seconds; parameters a and b are obtained by fitting the load dump characteristic curve of the silicon rectifier generator.

5. The intelligent power supply and distribution system of claim 1, wherein, Power supply and distribution control is carried out in the following ways: Step S1: Collect load power data of each power output interface in real time through the load monitoring unit; Step S2: Upon receiving a power-off command, the timing control unit determines the power-off sequence of the interfaces; Step S3: Following the interface power-off sequence determined in Step S2, perform the following steps for each interface: (1) Disconnect the current power output interface; (2) Calculate the buffer time Tn based on the real-time load power Pn of the current power output interface; (3) After waiting for Tn time, disconnect the next power output interface.

6. The intelligent power supply and distribution system of a vehicle according to claim 5, characterized in that, The interface power-off sequence determined in step S2 is as follows: (1) Connection sequence of the integrated power supply and each power supply output interface; or, (2) The order of load power Pn of the power output interface from large to small.

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