High-voltage power distribution unit for vehicle-mounted composite power supply and control method of high-voltage power distribution unit

A high-voltage power distribution and composite power supply technology, which is applied in the direction of electrical components, vehicle components, circuit devices, etc., can solve the problems that cannot meet the long-term leakage current and over-discharge protection of vehicles, and cannot satisfy the single or parallel coupling of the power system.

Active Publication Date: 2022-05-27
CHINA RAILWAY 15TH CONSTR BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional loop parallel joint control scheme cannot meet the two control modes of the power system alone or parallel coupling, and cannot meet the needs of vehicles such as long-term leakage current and over-discharge protection.

Method used

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  • High-voltage power distribution unit for vehicle-mounted composite power supply and control method of high-voltage power distribution unit
  • High-voltage power distribution unit for vehicle-mounted composite power supply and control method of high-voltage power distribution unit
  • High-voltage power distribution unit for vehicle-mounted composite power supply and control method of high-voltage power distribution unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] figure 1 It is an electrical schematic diagram of a high-voltage power distribution unit of a vehicle-mounted composite power supply provided in Embodiment 1 of the present invention, such as figure 1 As shown, a high-voltage power distribution unit for vehicle composite power supply includes high-voltage connectors P1+, P1-, P2+, P2-, DCDCIN+, DCDCOUT+, DCDCCOM-, MCU+, MCU-, Chn1, Chn2, Chn3, Chn4, current sensor Sen1, Sen2, fuses F1, F2, F3, F4, F5, F6, contactors S1, S2, S3, S4, S5, S6, S7, S8, S9, pre-charging resistors R1, R2, high voltage controller PCU, Sampling points T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, high-voltage copper bars, and shell assemblies;

[0068] The high-voltage connectors P1+ and P1- are respectively connected with the positive and negative poles of the first power supply of the composite power supply system; the high-voltage connectors P2+ and P2- are respectively connected with the positive and negative poles of the se...

Embodiment 2

[0096] figure 2 This is a flowchart of a connector detection program in a method for controlling a high-voltage power distribution unit of a vehicle-mounted composite power supply provided in the second embodiment of the present invention. Through the connector state detection, real-time state and fault state reporting is realized, and at the same time, the loop contactor is allowed to close state judgment. .

[0097] The connection status of the high-voltage connector is judged by the high-voltage connector status feedback signal. When the high-voltage connector connection feedback signal is in the disconnected state, the corresponding connector disconnection fault is reported, and the connector at the front or rear of the connector is disconnected at the same time.

[0098] like Figure 2~Figure 7 As shown, the technical solution of the embodiment of the present invention specifically includes the following steps:

[0099] S210. Detect the states of the high-voltage conne...

Embodiment 3

[0130] Figure 8~Figure 13 This is a flowchart of an insulation detection procedure in a method for controlling a high-voltage power distribution unit of a vehicle-mounted composite power supply provided by the third embodiment of the present invention. The insulation resistance value of the casing is detected by sampling points to realize the inspection of the insulation status of each circuit and the reporting of insulation faults, and at the same time, the judgment of the allowable closed state of the circuit contactor is realized.

[0131] By detecting the insulation resistance value between each sampling point and the casing, the insulation state of the circuit where the sampling point is located is judged. When the insulation resistance of a sampling point is lower than the set threshold, the corresponding circuit insulation fault is reported, and the circuit where the sampling point is located is disconnected at the same time. contactor.

[0132] like image 3 As show...

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Abstract

The invention discloses a high-voltage power distribution unit for a vehicle-mounted composite power supply and a control method of the high-voltage power distribution unit. The high-voltage power distribution unit structurally comprises a power supply power distribution loop, a load power distribution loop, an insulation detection loop, a sensor, a high-voltage control unit and the like, according to the control method, high redundancy of the system is achieved through independent control and parallel coupling of loops of the composite power supply system, real-time state monitoring and fault diagnosis of the system are achieved through high-voltage contactor feedback signals, connector feedback signals and the like, insulation detection of the system is achieved through system step-by-step power-on control, and meanwhile the functions of loop current detection and the like are achieved. According to the technical scheme, high-safety and high-redundancy high-voltage power distribution and control of pure electric vehicles, hybrid power vehicles, fuel cell vehicles and the like matched with a composite power supply can be realized.

Description

technical field [0001] The invention belongs to the field of automobile control, and in particular relates to a high-voltage power distribution unit for a vehicle-mounted composite power supply and a control method thereof. Background technique [0002] Vehicle composite power supply system is a power supply system that uses two or more power supplies that can simultaneously provide or store electrical energy for the vehicle. The control unit is provided by the power supply system individually or jointly according to the status of the vehicle components or the power demand status of the vehicle. Absorbing electrical energy, common power systems include lithium battery systems, lead-acid battery systems, and supercapacitor systems. The high-voltage power distribution unit is generally composed of contactors, fuses, connectors, control units, housings and corresponding sensors. It receives external control instructions or control signals, and the control unit or external contr...

Claims

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Application Information

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IPC IPC(8): H02H1/00H02H3/05B60R16/03
CPCH02H1/0007H02H1/0061H02H3/05B60R16/03Y02T10/70
Inventor 黄昌富李建旺祁文睿张庆军肖清安焦雷吴康栾焕强李阁强邱泽刚董振乐潘恒宇田国文
Owner CHINA RAILWAY 15TH CONSTR BUREAU GRP
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