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A third rail and lithium battery hybrid power supply circuit

A hybrid power supply and lithium battery technology, which is applied in battery/battery traction, collectors, electric vehicles, etc., can solve the problems of short life of super capacitors, unsuitable for large current discharge of subway vehicles, and high cost

Active Publication Date: 2021-05-07
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adopting this kind of emergency traction scheme requires many charging stations, which leads to high infrastructure costs; and frequent charging is required, and the supercapacitor has a short life, frequent replacement, and high cost; Due to the technical limitations of the capacitor itself, the current super capacitor is not suitable for long-term high-current discharge of subway vehicles, and cannot be pulled for a long distance. Currently, it is only loaded on trams

Method used

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  • A third rail and lithium battery hybrid power supply circuit
  • A third rail and lithium battery hybrid power supply circuit
  • A third rail and lithium battery hybrid power supply circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Taking the three-moving and three-trailer urban rail vehicle as an example to introduce the scheme, the marshalling type is -Tc+M+M-T+M+Tc-. When the vehicle is in lithium battery emergency traction, the whole train will be provided with the power required for train traction by three motor cars, and the transfer switch will be set on the M\M1\M three motor cars, lithium battery box BT, DC / DC converter and auxiliary isolating switch The box IVS is arranged on the trailer T, and is connected to each other through a high-voltage bus. The topology of the hybrid power supply circuit is as follows: Figure 7 shown.

[0066] The battery emergency traction conditions for the storage of the urban rail vehicle are as follows:

[0067] Condition 1: (1) 20‰ slope 325m (AW3) + straight road 500m (AW3);

[0068] Condition 2: (2) 24.2‰ slope 200m (AW3) + 3.5‰ slope 150m (AW3) + straight road 150m

[0069] Considering that condition 1 is more difficult than condition 2, the entire l...

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Abstract

A hybrid power supply circuit of the third rail and lithium battery. In the emergency situation where the third rail has no grid voltage, the electric energy required for the emergency traction of the vehicle is powered by the emergency traction lithium battery; and the third rail and the lithium battery power supply are converted through a switch box control. The technical scheme of the present invention realizes the emergency traction power supply of the lithium battery of urban rail vehicles, based on many advantages of the lithium battery, it can meet the emergency traction energy consumption demand of long-term high-current discharge, and solves the problem of special non-electric areas (such as in-sections, knives and forks) Crossroads, etc.) traction, traction in emergency conditions, traction problems in complex ramp conditions. The hybrid power supply circuit is more secure. When the power supply network fails, the vehicle can be towed to the nearby station to unload passengers and return to the warehouse. There is no need to tow the vehicle for rescue, and the vehicle self-rescue function can be realized.

Description

technical field [0001] The invention relates to the technical field of urban rail vehicle power supply, in particular to a third rail and lithium battery hybrid power supply circuit. Background technique [0002] At present, urban rail vehicles are mainly powered by catenary or the third rail. This power supply method has the characteristics of mature and reliable, convenient installation and layout, etc., but it cannot solve the grid faults and special no-power areas (intra-segment shifting) that occur in the current vehicle operation. Vehicle traction problems in depots, intersections, etc.). At present, the existing emergency traction scheme is only suitable for short-distance flat and straight roads, which cannot meet the emergency traction needs of slopes and complex working conditions, and has many restrictions on vehicles. [0003] In an emergency traction scheme in the prior art, a mixed power supply scheme of the third rail and alkaline battery is adopted. This sch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L5/39B60L50/60
CPCB60L5/39B60L2200/26B60L50/60Y02T10/70
Inventor 刘秀美吴英帅王尔为李雨李亮张哲
Owner CRRC DALIAN CO LTD
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