CN111547078A

CN111547078A - Non-net self-walking storage battery and auxiliary converter system for rail transit

Info

Publication number: CN111547078A
Application number: CN202010330262.XA
Authority: CN
Inventors: 马彬睿; 马泽宇; 韩耸; 梁珏; 孟学东; 姚海英
Original assignee: Beijing Beijiao New Energy Technology Co ltd
Current assignee: Beijing Beijiao New Energy Technology Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-08-18

Abstract

The invention relates to a netless self-walking storage battery + auxiliary converter system for rail transit, which comprises two groups of lithium titanate battery packs, a current acquisition monitoring module and a BMS battery management system; the lithium titanate battery pack stores electric energy, controls the electric energy through the contactor, transmits the electric energy to the train through total positive and negative transmission to control bidirectional DC/DC (direct current/direct current) of train charging and discharging, and carries out netless self-walking or charges two groups of lithium titanate batteries through train control. The two groups of lithium titanate battery packs are connected in parallel through the battery pack parallel contactor to realize the parallel connection to supply power to the auxiliary converter; the auxiliary system is powered through the unidirectional DC/DC module; the original vehicle auxiliary battery is replaced by the unidirectional DC/DC module and the lithium titanate battery pack. The current acquisition monitoring module samples current and transmits data to the BMS battery management system. The BMS battery management system monitors the state of the lithium titanate battery pack, ensures that the lithium titanate battery pack is in a healthy working state, communicates with a train, and performs emergency traction and auxiliary storage battery system diagnosis and debugging on rail transit.

Description

Non-net self-walking storage battery and auxiliary converter system for rail transit

Technical Field

The invention belongs to the crossing field of a rail transit power supply technology and an energy storage technology, and particularly relates to a netless self-walking storage battery and auxiliary converter system for rail transit.

Background

The rail transit non-network self-walking storage battery and auxiliary converter system combines a rail transit power supply technology and a lithium titanate battery energy storage technology to form an independent system which is installed at the bottom of a subway or motor train unit vehicle, and the installation mode is vehicle bottom hoisting. The rail transit such as subway, motor car is regarded as the most green traffic mode with characteristics such as the freight volume is big, fast, safety, environmental protection and energy saving. Due to the large volume of traffic, the power supply system of the vehicle is of particular importance. The train running mode of the self-running without the network can provide a new power supply mode for the vehicle, and the self-running of the train in multiple power supply modes is possible later. In addition, when the vehicle SIV (auxiliary inverter) fails, the auxiliary battery pack fails, and the like, the lithium titanate battery pack can be completely used as an auxiliary battery of the vehicle if the lithium titanate battery pack can be used as a power source for self-walking of the vehicle and simultaneously provides an auxiliary power source, so that the reliability of the vehicle is improved. The emergency traction and auxiliary storage batteries for rail transit vehicles are generally lead-acid batteries and cadmium-nickel batteries, and the batteries have the characteristics of short service life, memory effect and the like. Therefore, the invention is a safe, reliable and environment-friendly netless self-walking storage battery and auxiliary converter system for rail transit, and is very urgent.

The invention is proved by national standard tests that explosion and fire can not occur under various conditions, and the invention is absolutely safe and reliable.

The invention can realize the netless self-walking and independent auxiliary power supply of the train, and the service life is more than 10000 times.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a netless self-walking storage battery and auxiliary converter system for rail transit, wherein the netless self-walking storage battery and the auxiliary converter system are arranged at the bottom of a rail transit vehicle, electric energy is processed and converted and then stored in a battery pack made of lithium titanate material, and the system comprises a butt joint interface with the rail transit vehicle and can provide electric energy required by netless self-walking and auxiliary power supply according to needs.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

a netless self-walking storage battery + auxiliary converter system for rail transit comprises: 1# lithium

titanate battery pack

1, 1#

negative fuse

2, 1#

positive fuse

3, 1#

circuit breaker

4, 1# current collection monitoring module I5, 1# voltage collection monitoring module I6, 1# unidirectional DC/

DC module

7, 1#

negative contactor

8, 1# pre-charging

contactor

9, 1#

emergency charging fuse

10, 1#

positive contactor

11, 1# pre-charging

resistor

12, 1# voltage collection monitoring module II 13, 1# total

negative output interface

14, 1# negative

emergency charging interface

15, 1#

communication interface

16, 1# positive

emergency charging interface

17, 1# total

positive output interface

18, 1# current collection monitoring module II 19, 1#

anti-mutual charging diode

20, 1# auxiliary

power output fuse

21, 1# auxiliary

power output contactor

22, 1# battery pack

parallel connector

23, 1# BMS battery management system 24, An auxiliary power output interface 30, a 2# lithium titanate battery pack 31, a 2# negative fuse 32, a 2# positive fuse 33, a 2# circuit breaker 34, a 2# current collection monitoring module I35, a 2# voltage collection monitoring module I36, a 2# unidirectional DC/DC module 37, a 2# negative contactor 38, a 2# pre-charging contactor 39, a 2# emergency charging fuse 40 and a 2# positive contactor 41, the system comprises a 2# pre-charging resistor 42, a 2# voltage acquisition monitoring module II 43, a 2# total negative output interface 44, a 2# negative emergency charging interface 45, a 2# communication interface 46, a 2# positive emergency charging interface 47, a 2# total positive output interface 48, a 2# current acquisition monitoring module II 49, a 2# mutual charging prevention diode 50, a 2# auxiliary power supply output fuse 51, a 2# auxiliary power supply output contactor 52, a 2# battery pack parallel connector 53 and a 2# BMS battery management system 54;

the negative electrode of the 1# lithium titanate battery pack 1 is connected with one end of a 1# negative electrode fuse 2, the other end of the 1# negative electrode fuse 2 is connected with one end of one electrode of a 1# circuit breaker 4, the other end of one electrode of the 1# circuit breaker 4 is respectively connected with one end of a 1# negative electrode contactor 8, the negative electrode of a 1# voltage acquisition monitoring module I6, the negative electrode of a 1# unidirectional DC/DC module 7 and a 1# negative electrode emergency charging interface 15, and the other end of the 1# negative electrode contactor 8 is respectively connected with the negative electrode of a 1# voltage acquisition monitoring module II 13 and a 1# total negative output interface 14;

the positive electrode of the 1# lithium titanate battery pack 1 is connected with one end of a 1# positive electrode fuse 3, the other end of the 1# positive electrode fuse 3 is connected with one end of the other electrode of a 1# circuit breaker 4, the other end of the other electrode of the 1# circuit breaker 4 is connected with one end of a 1# current acquisition monitoring module I5, the other end of the 1# current acquisition monitoring module I5 is respectively connected with the positive electrode of a 1# voltage acquisition monitoring module I6, the positive electrode of a 1# unidirectional DC/DC module 7, one end of a 1# pre-charging contactor 9, one end of a 1# emergency charging fuse 10, one end of a 1# current acquisition monitoring module II 19 and one end of a 1# positive electrode contactor 11, and the other end of the 1# positive electrode contactor 11 is respectively connected with the other end of a 1# pre-charging resistor 12, the positive electrode of the 1# voltage acquisition monitoring module II 13 and a 1# total positive;

the other end of the 1# pre-charging contactor 9 is connected with one end of a 1# pre-charging resistor 12, and the other end of the 1# emergency charging fuse 10 is connected with a 1# positive electrode emergency charging interface 17;

the other end of the second 1# current acquisition monitoring module 19 is connected with the anode of the second 1# anti-mutual-charging diode 20, the cathode of the second 1# anti-mutual-charging diode 20 is connected with one end of the output fuse 21 of the auxiliary power supply 1, the other end of the output fuse 21 of the auxiliary power supply 1 is connected with one end of the output contactor 22 of the auxiliary power supply 1, the other end of the output contactor 22 of the auxiliary power supply 1 is connected with one end of the parallel connector 23 of the battery pack 1, and the other end of the parallel connector 23 of the battery pack 1 is connected with the output interface 30 of the auxiliary power supply;

the 1# BMS battery management system 24 is respectively connected with a 1# lithium titanate battery pack 1, a 1# negative fuse 2, a 1# positive fuse 3, a 1# current acquisition monitoring module I5, a 1# voltage acquisition monitoring module I6, a 1# negative contactor 8, a 1# pre-charging contactor 9, a 1# positive contactor 11, a 1# voltage acquisition monitoring module II 13, a 1# communication interface 16, a 1# current acquisition monitoring module II 19, a 1# mutual charging prevention diode 20, a 1# auxiliary power supply output fuse 21 and a 1# auxiliary power supply output contactor 22;

the negative electrode of the 2# lithium titanate battery pack 31 is connected with one end of a 2# negative electrode fuse 32, the other end of the 2# negative electrode fuse 32 is connected with one end of one electrode of a 2# circuit breaker 34, the other end of one electrode of the 2# circuit breaker 34 is respectively connected with one end of a 2# negative electrode contactor 38, the negative electrode of a 2# voltage acquisition monitoring module I36, the negative electrode of a 2# unidirectional DC/DC module 37 and a 2# negative electrode emergency charging interface 45, and the other end of the 2# negative electrode contactor 38 is respectively connected with the negative electrode of a 2# voltage acquisition monitoring module II 43 and a 2# total negative output interface 44;

the positive electrode of the 2# lithium titanate battery pack 31 is connected with one end of a 2# positive electrode fuse 33, the other end of the 2# positive electrode fuse 33 is connected with one end of the other electrode of a 2# circuit breaker 34, the other end of the other electrode of the 2# circuit breaker 34 is connected with one end of a 2# current acquisition monitoring module I35, the other end of the 2# current acquisition monitoring module I35 is respectively connected with the positive electrode of a 2# voltage acquisition monitoring module I36, the positive electrode of a 2# unidirectional DC/DC module 37, one end of a 2# positive electrode contactor 41, one end of a 2# pre-charging contactor 39, one end of a 2# emergency charging fuse 40 and one end of a 2# current acquisition monitoring module II 49, and the other end of the 2# positive electrode contactor 41 is respectively connected with the other end of a 2# pre-charging resistor 42, the positive electrode of a 2# voltage acquisition monitoring module II 43 and a 2;

the other end of the # 2 precharge contactor 39 is connected to one end of a # 2 precharge resistor 42,

the other end of the 2# emergency charging fuse 40 is connected with a 2# positive emergency charging interface 47;

the other end of the second 2# current acquisition monitoring module 49 is connected with the anode of the second 2# anti-mutual-charging diode 50, the cathode of the second 2# anti-mutual-charging diode 50 is connected with one end of a second 2# auxiliary power supply output fuse 51, the other end of the second 2# auxiliary power supply output fuse 51 is connected with one end of a second 2# auxiliary power supply output contactor 52, the other end of the second 2# auxiliary power supply output contactor 52 is connected with one end of a second 2# battery pack parallel connector 53, and the other end of the second 2# battery pack parallel connector 53 is connected with the auxiliary power supply output interface 30;

the 2# BMS battery management system 54 is respectively connected with the 2# lithium titanate battery pack 31, the 2# negative fuse 32, the 2# positive fuse 33, the 2# current collection monitoring module I35, the 2# voltage collection monitoring module I36, the 2# negative contactor 38, the 2# pre-charging contactor 39, the 2# positive contactor 41, the 2# voltage collection monitoring module II 43, the 2# communication interface 46, the 2# current collection monitoring module II 49, the 2# mutual charging prevention diode 50, the 2# auxiliary power output fuse 51 and the 2# auxiliary power output contactor 52;

the 1# lithium titanate battery pack 1 is connected with a vehicle-mounted charging and discharging DC/DC through a 1# total negative output interface 14 and a 1# total positive output interface 18, the 2# lithium titanate battery pack 31 is connected with the vehicle-mounted charging and discharging DC/DC through a 2# total negative output interface 44 and a 2# total positive output interface 48, the 1# lithium titanate battery pack 1 is used for storing electric energy, the 1# total negative output interface 14 and the 1# total positive output interface 18 are used for supplying power to a train direct current bus to perform self-walking without a network, the 2# lithium titanate battery pack 31 is used for storing electric energy, and the 2# total negative output interface 44 and the 2# total positive output interface 48 are used for supplying power to the train direct current bus to perform self-walking without a network; the No. 1 lithium titanate battery pack and the No. 2 lithium titanate battery pack 31 are also used for supplying power to an auxiliary power supply of the train through an auxiliary power supply output interface 30;

the 1# total negative output interface 14 and the 1# total positive output interface 18 are used for supplying power to a train direct-current bus and also used for charging the 1# lithium titanate battery pack 1;

the 2# total negative output interface 44 and the 2# total positive output interface 48 are used for supplying power to a train direct-current bus and also used for charging the 2# lithium titanate battery pack 31;

the 1# negative electrode emergency charging interface 15 and the 1# positive electrode emergency charging interface 17 are used for carrying out emergency charging on the 1# lithium titanate battery pack 1, and the 2# negative electrode emergency charging interface 45 and the 2# positive electrode emergency charging interface 47 are used for carrying out emergency charging on the 2# lithium titanate battery pack 31;

the 1# negative fuse 2, the 1# positive fuse 3, the 1# emergency charging fuse 10, the 1# auxiliary power supply output fuse 21, the 2# negative fuse 32, the 2# positive fuse 33, the 2# emergency charging fuse 40 and the 2# auxiliary power supply output fuse 51 are used for carrying out overload and short-circuit protection on a circuit of a wireless self-walking storage battery and an auxiliary converter system;

the 1# circuit breaker 4 and the 2# circuit breaker 34 are used for carrying out overload and short-circuit protection on circuits of the netless self-walking storage battery and the auxiliary converter system, isolating the voltage of the lithium titanate battery pack during maintenance, ensuring personal safety and manually cutting off external output;

the first 1# current collection monitoring module 5 and the second 1# current collection monitoring module 19 are used for isolating the high voltage of the lithium titanate battery pack 1# from the low voltage of the sampling power supply, sampling the charge and discharge current of the lithium titanate battery pack 1# and transmitting the current data to the BMS battery management system 24 # 1;

the first 2# current collection monitoring module 35 and the second 2# current collection monitoring module 49 are used for isolating the high voltage of the lithium titanate battery pack 31 # 2 from the low voltage of a sampling power supply, sampling the charge-discharge current of the lithium titanate battery pack 31 # 2, and transmitting the current data to the BMS battery management system 54 # 2;

the first 1# voltage acquisition monitoring module 6 and the second 1# voltage acquisition monitoring module 13 are used for sampling the internal total pressure and the external total pressure of the lithium titanate battery pack 1# 1 and transmitting voltage data to the BMS battery management system 1# 24;

the first 2# voltage acquisition monitoring module 36 and the second 2# voltage acquisition monitoring module 43 are used for sampling the internal total pressure and the external total pressure of the 2# lithium titanate battery pack 31 and transmitting voltage data to the 2# BMS battery management system 54;

the 1# unidirectional DC/DC module 7 is used for adjusting the voltage of the 1# lithium titanate battery pack 1 to a voltage suitable for the 1# BMS battery management system 24 and the auxiliary load of the train to work; under the condition that auxiliary power supply of the train cannot be provided, the 1# BMS battery management system 24 is put into operation, and the 1# BMS battery management system 24 which is put into operation is used for controlling the 1# lithium titanate battery pack 1 to output electric energy through the 1# total negative output interface 14 and the 1# total positive output interface 18, so that the train can normally work under the condition that no auxiliary power supply is provided;

the # 2 unidirectional DC/DC module 37 is used for adjusting the voltage of the # 2 lithium titanate battery pack 31 to a voltage suitable for the operation of the # 2 BMS battery management system 54 and the auxiliary loads of the train; under the condition that auxiliary power supply of the train cannot be provided, the 2# BMS battery management system 54 is put into operation, and the 2# BMS battery management system 54 which is put into operation is used for controlling the 2# lithium titanate battery pack 31 to output electric energy through the 2# total negative output interface 44 and the 2# total positive output interface 48, so that the train can normally work under the condition that no auxiliary power supply is provided;

the 1# negative electrode contactor 8 and the 1# positive electrode contactor 11 are used for switching on and off a charge-discharge loop of the 1# lithium titanate battery pack 1;

the 2# negative electrode contactor 38 and the 2# positive electrode contactor 41 are used for switching on and off a charge-discharge loop of the 2# lithium titanate battery pack 31;

the 1# pre-charging contactor 9 and the 1# pre-charging resistor 12 are used for pre-charging the 1# lithium titanate battery pack 1;

the 2# pre-charging contactor 39 and the 2# pre-charging resistor 42 are used for pre-charging the 1# lithium titanate battery pack 31;

the 1# communication interface 16 is an interface for interaction and control of external information by the 1# BMS battery management system 24, the train network sends an instruction to the 1# communication interface 16, the 1# BMS battery management system 24 is used for responding to the instruction to control the netless self-walking storage battery + auxiliary converter system, and the 1# BMS battery management system 24 is also used for sending storage battery state information to the train through the 1# communication interface 16;

the 2# communication interface 46 is an interface for exchanging and controlling external information by the 2# BMS battery management system 54, the train network sends an instruction to the 2# communication interface 46, the 2# BMS battery management system 54 is used for responding to the instruction to control the netless self-walking storage battery + auxiliary converter system, and the 2# BMS battery management system 54 is also used for sending storage battery state information to the train through the 2# communication interface 46;

the 1# mutual charging prevention diode 20 and the 2# mutual charging prevention diode 50 are used for preventing the 1# lithium titanate battery pack 1 and the 2# lithium titanate battery pack 31 from being charged and discharged mutually;

the 1# auxiliary power supply output contactor 22 is used for switching on and off a discharge loop of the 1# lithium titanate battery pack 1;

the 2# auxiliary power supply output contactor 52 is used for switching on and off a discharging loop of the 2# lithium titanate battery pack 31;

the 1# battery pack parallel connector 23 and the 2# battery pack parallel connector 53 are used for connecting the positive electrode of the 1# lithium titanate battery pack 1 and the positive electrode of the 2# lithium titanate battery pack 31 in parallel;

the 1# BMS battery management system 24 is used for collecting information of a 1# lithium titanate battery pack 1, a 1# negative electrode fuse 2, a 1# positive electrode fuse 3, a 1# current collection monitoring module I5, a 1# voltage collection monitoring module I6, a 1# negative electrode contactor 8, a 1# pre-charging contactor 9, a 1# emergency charging fuse 10, a 1# positive electrode contactor 11, a 1# pre-charging resistor 12, a 1# voltage collection monitoring module II 13, a 1# communication interface 16, a 1# current collection monitoring module II 19, a 1# mutual charging prevention diode 20, a 1# auxiliary power output fuse 21, a 1# auxiliary power output contactor 22 and a 2# BMS battery management system 54, processing the information, and then performing control, protection and alarm lamp actions; meanwhile, the 1# BMS battery management system 24 is also used for controlling the on and off of the 1# negative contactor 8, the 1# pre-charging contactor 9, the 1# positive contactor 11 and the 1# auxiliary power supply output contactor 22; meanwhile, the 1# BMS battery management system 24 is also used for feeding back alarm information and state information of the netless self-walking storage battery and the auxiliary converter system to the train network;

the 2# BMS battery management system 54 is used for collecting information of the 2# lithium titanate battery pack 31, the 2# negative fuse 32, the 2# positive fuse 33, the 2# current collection monitoring module I35, the 2# voltage collection monitoring module I36, the 2# negative contactor 38, the 2# pre-charging contactor 39, the 2# emergency charging fuse 40, the 2# positive contactor 41, the 2# pre-charging resistor 42, the 2# voltage collection monitoring module II 43, the 2# communication interface 46, the 2# current collection monitoring module II 49, the 2# mutual charging prevention diode 50, the 2# auxiliary power output fuse 51, the 2# auxiliary power output contactor 52 and the 1# BMS battery management system 24, processing the information, and then performing control, protection and alarm lamp actions; meanwhile, the 2# BMS battery management system 54 is also used for controlling the on and off of the 2# negative contactor 38, the 2# pre-charging contactor 39, the 2# positive contactor 41 and the 2# auxiliary power output contactor 52; meanwhile, the 2# BMS battery management system 54 is further configured to feed back alarm information and status information of the netless self-propelled battery + auxiliary converter system to the train network.

On the basis of the technical scheme, the 1# lithium titanate battery pack 1 and the 2# lithium titanate battery pack 31 are high in energy density, high in multiplying power, free of memory effect and good in low-temperature performance and safety performance.

On the basis of the above technical solution, the 1# negative contactor 8, the 1# pre-charging contactor 9, the 1# positive contactor 11, the 1# auxiliary power output contactor 22, the 2# negative contactor 38, the 2# pre-charging contactor 39, the 2# positive contactor 41, and the 2# auxiliary power output contactor 52 are all contactors that have a wide range and a large capacity for a railway, have a bidirectional arc extinguishing capability, and have main contacts that do not distinguish between positive and negative poles.

On the basis of the above technical solution, the 1# BMS battery management system 24 and the 2# BMS battery management system 54 employ rail transit-dedicated BMSs.

On the basis of the technical scheme, when no auxiliary power supply is provided from the outside, after the 1# BMS battery management system 24 receives the closing instructions of the 1# positive contactor 11 and the 1# negative contactor 8, the 1# BMS battery management system 24 provides the auxiliary power supply for the 1# BMS battery management system 24 by using the 1# unidirectional DC/DC module 7;

after the # 2 BMS battery management system 54 receives the command to close the # 2 positive contactor 41 and the # 2 negative contactor 38, the # 2 BMS battery management system 54 provides auxiliary power to the # 2 BMS battery management system 54 using the # 2 unidirectional DC/DC module 37.

On the basis of the above technical solution, when the auxiliary battery pack of the train is not normally put into use, the auxiliary power output interface 30 directly provides a power supply for the auxiliary inverter of the train SIV, and activates the auxiliary power supply system of the train.

On the basis of the technical scheme, when the auxiliary inverter of the train SIV fails, the 1# unidirectional DC/DC module 7 and the 2# unidirectional DC/DC module 37 provide auxiliary power supply for the train; the netless self-walking storage battery and auxiliary converter system replace the form of the original SIV auxiliary inverter and auxiliary storage battery, and a redundant power supply mode is provided for the form of the original SIV auxiliary inverter and auxiliary storage battery.

On the basis of the technical scheme, the 1# lithium titanate battery pack 1, the 1# negative fuse 2, the 1# positive fuse 3, the 1# circuit breaker 4, the 1# current acquisition monitoring module I5, the 1# voltage acquisition monitoring module I6, the 1# unidirectional DC/DC module 7, the 1# negative contactor 8, the 1# pre-charging contactor 9, the 1# emergency charging fuse 10, the 1# positive contactor 11, the 1# pre-charging resistor 12, the 1# voltage acquisition monitoring module II 13, the 1# total negative output interface 14, the 1# negative emergency charging interface 15, the 1# communication interface 16, the 1# positive emergency charging interface 17, the 1# total positive output interface 18, the 1# current acquisition monitoring module II 19, the 1# mutual charging prevention diode 20, the 1# auxiliary power output fuse 21, the 1# auxiliary power output contactor 22, and the 1# battery pack parallel connector 23, The # 1 BMS battery management system 24 and the auxiliary power output interface 30 can form a group of independent netless self-walking storage battery + auxiliary converter system;

the 2# lithium titanate battery pack 31, the 2# negative fuse 32, the 2# positive fuse 33, the 2# circuit breaker 34, the 2# current collecting and monitoring module I35, the 2# voltage collecting and monitoring module I36, the 2# unidirectional DC/DC module 37, the 2# negative contactor 38, the 2# pre-charging contactor 39, the 2# emergency charging fuse 40, the 2# positive contactor 41, the 2# pre-charging resistor 42, the 2# voltage collecting and monitoring module II 43, the 2# total negative output interface 44, the 2# negative emergency charging interface 45, the 2# communication interface 46, the 2# positive emergency charging interface 47, the 2# total positive output interface 48, the 2# current collecting and monitoring module II 49, the 2# mutual charging prevention diode 50, the 2# auxiliary power output fuse 51, the 2# auxiliary power output contactor 52, the 2# battery pack parallel connector 53, the 2# BMS battery management system 54 and the auxiliary power output interface 30 can form another set of independent self-propelled and non-network power storage battery storage Pool + auxiliary converter system.

The invention has the following beneficial technical effects:

the technical scheme of the invention can realize the netless self-walking of subways, motor cars and the like, the input power supply of the auxiliary converter, the output power supply of the auxiliary converter and the starting power supply of the auxiliary battery, wherein the battery adopts a lithium titanate battery and is provided with a Battery Management System (BMS), and the BMS can monitor the emergency traction for rail transit and the state of the auxiliary storage battery system in real time; the reliability of auxiliary power supply is improved, and the netless self-walking capability of the vehicle is enhanced. The invention is suitable for various rail transit vehicles, and is safe and reliable.

Drawings

The invention has the following drawings:

FIG. 1 is a block diagram of the present invention.

Detailed Description

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

As shown in fig. 1, a netless self-walking battery + auxiliary converter system for rail transit includes: 1# lithium titanate battery pack 1, 1# negative fuse 2, 1# positive fuse 3, 1# circuit breaker 4, 1# current collection monitoring module I5, 1# voltage collection monitoring module I6, 1# unidirectional DC/DC module 7, 1# negative contactor 8, 1# pre-charging contactor 9, 1# emergency charging fuse 10, 1# positive contactor 11, 1# pre-charging resistor 12, 1# voltage collection monitoring module II 13, 1# total negative output interface 14, 1# negative emergency charging interface 15, 1# communication interface 16, 1# positive emergency charging interface 17, 1# total positive output interface 18, 1# current collection monitoring module II 19, 1# anti-mutual charging diode 20, 1# auxiliary power output fuse 21, 1# auxiliary power output contactor 22, 1# battery pack parallel connector 23, 1# BMS battery management system 24, An auxiliary power output interface 30, a 2# lithium titanate battery pack 31, a 2# negative fuse 32, a 2# positive fuse 33, a 2# circuit breaker 34, a 2# current collection monitoring module I35, a 2# voltage collection monitoring module I36, a 2# unidirectional DC/DC module 37, a 2# negative contactor 38, a 2# pre-charging contactor 39, a 2# emergency charging fuse 40 and a 2# positive contactor 41, the system comprises a 2# pre-charging resistor 42, a 2# voltage acquisition monitoring module II 43, a 2# total negative output interface 44, a 2# negative emergency charging interface 45, a 2# communication interface 46, a 2# positive emergency charging interface 47, a 2# total positive output interface 48, a 2# current acquisition monitoring module II 49, a 2# mutual charging prevention diode 50, a 2# auxiliary power supply output fuse 51, a 2# auxiliary power supply output contactor 52, a 2# battery pack parallel connector 53 and a 2# BMS battery management system 54;

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and obvious variations and modifications may be made within the scope of the present invention.

Those not described in detail in this specification are within the skill of the art.

Claims

1. The utility model provides a no net is from walking battery + supplementary conversion system for track traffic which characterized in that includes: 1# lithium titanate battery pack (1), 1# negative pole fuse (2), 1# positive pole fuse (3), 1# circuit breaker (4), 1# current collection monitoring module I (5), 1# voltage collection monitoring module I (6), 1# unidirectional DC/DC module (7), 1# negative pole contactor (8), 1# pre-charging contactor (9), 1# emergency charging fuse (10), 1# positive pole contactor (11), 1# pre-charging resistor (12), 1# voltage collection monitoring module II (13), 1# total negative output interface (14), 1# negative pole emergency charging interface (15), 1# communication interface (16), 1# positive pole emergency charging interface (17), 1# total positive output interface (18), 1# current collection monitoring module II (19), 1# anti-mutual charging diode (20), 1# auxiliary power supply output fuse (21), 1# auxiliary power output contactor (22), 1# group battery parallel connector (23), 1# BMS battery management system (24), auxiliary power output interface (30), 2# lithium titanate group (31), 2# negative pole fuse (32), 2# positive pole fuse (33), 2# circuit breaker (34), 2# current collection monitoring module I (35), 2# voltage collection monitoring module I (36), 2# one-way DC/DC module (37), 2# negative pole contactor (38), 2# pre-charging contactor (39), 2# emergency charging fuse (40), 2# positive pole contactor (41), 2# pre-charging resistor (42), 2# voltage collection monitoring module II (43), 2# total negative output interface (44), 2# negative pole emergency charging interface (45), 2# communication interface (46), 2# positive pole emergency charging interface (47), A 2# total positive output interface (48), a 2# current collection monitoring module II (49), a 2# mutual charging prevention diode (50), a 2# auxiliary power supply output fuse (51), a 2# auxiliary power supply output contactor (52), a 2# battery pack parallel connector (53) and a 2# BMS battery management system (54);

the negative electrode of the 1# lithium titanate battery pack (1) is connected with one end of the 1# negative electrode fuse (2), the other end of the 1# negative electrode fuse (2) is connected with one end of one electrode of the 1# circuit breaker (4), the other end of one electrode of the 1# circuit breaker (4) is respectively connected with one end of a 1# negative electrode contactor (8), the negative electrode of a 1# voltage acquisition monitoring module I (6), the negative electrode of a 1# unidirectional DC/DC module (7) and a 1# negative electrode emergency charging interface (15), and the other end of the 1# negative electrode contactor (8) is respectively connected with the negative electrode of a 1# voltage acquisition monitoring module II (13) and a 1# total negative output interface (14);

the anode of the No. 1 lithium titanate battery pack (1) is connected with one end of a No. 1 anode fuse (3), the other end of the No. 1 anode fuse (3) is connected with one end of the other electrode of a No. 1 circuit breaker (4), the other end of the other electrode of the No. 1 circuit breaker (4) is connected with one end of a No. 1 current acquisition monitoring module I (5), the other end of the No. 1 current acquisition monitoring module I (5) is respectively connected with the anode of a No. 1 voltage acquisition monitoring module I (6), the anode of a No. 1 unidirectional DC/DC module (7), one end of a No. 1 pre-charging contactor (9), one end of a No. 1 emergency charging fuse (10), one end of a No. 1 current acquisition monitoring module II (19) and one end of a No. 1 anode contactor (11), the other end of the 1# positive contactor (11) is respectively connected with the other end of the 1# pre-charging resistor (12), the positive electrode of the 1# voltage acquisition monitoring module II (13) and a 1# total positive output interface (18);

the other end of the No. 1 pre-charging contactor (9) is connected with one end of a No. 1 pre-charging resistor (12), and the other end of the No. 1 emergency charging fuse (10) is connected with a No. 1 positive electrode emergency charging interface (17);

the other end of the 1# current acquisition monitoring module II (19) is connected with the anode of the 1# mutual charging prevention diode (20), the cathode of the 1# mutual charging prevention diode (20) is connected with one end of a 1# auxiliary power supply output fuse (21), the other end of the 1# auxiliary power supply output fuse (21) is connected with one end of a 1# auxiliary power supply output contactor (22), the other end of the 1# auxiliary power supply output contactor (22) is connected with one end of a 1# battery pack parallel connector (23), and the other end of the 1# battery pack parallel connector (23) is connected with an auxiliary power supply output interface (30);

the 1# BMS battery management system (24) is respectively connected with a 1# lithium titanate battery pack (1), a 1# negative electrode fuse (2), a 1# positive electrode fuse (3), a 1# current acquisition monitoring module I (5), a 1# voltage acquisition monitoring module I (6), a 1# negative electrode contactor (8), a 1# pre-charging contactor (9), a 1# positive electrode contactor (11), a 1# voltage acquisition monitoring module II (13), a 1# communication interface (16), a 1# current acquisition monitoring module II (19), a 1# mutual charging prevention diode (20), a 1# auxiliary power supply output fuse (21) and a 1# auxiliary power supply output contactor (22);

the negative electrode of the 2# lithium titanate battery pack (31) is connected with one end of a 2# negative electrode fuse (32), the other end of the 2# negative electrode fuse (32) is connected with one end of one electrode of a 2# circuit breaker (34), the other end of one electrode of the 2# circuit breaker (34) is respectively connected with one end of a 2# negative electrode contactor (38), the negative electrode of a 2# voltage acquisition monitoring module I (36), the negative electrode of a 2# unidirectional DC/DC module (37) and a 2# negative electrode emergency charging interface (45), and the other end of the 2# negative electrode contactor (38) is respectively connected with the negative electrode of a 2# voltage acquisition monitoring module II (43) and a 2# total negative output interface (44);

the anode of the No. 2 lithium titanate battery pack (31) is connected with one end of a No. 2 anode fuse (33), the other end of the No. 2 anode fuse (33) is connected with one end of the other electrode of a No. 2 circuit breaker (34), the other end of the other electrode of the No. 2 circuit breaker (34) is connected with one end of a No. 2 current acquisition monitoring module I (35), the other end of the No. 2 current acquisition monitoring module I (35) is respectively connected with the anode of a No. 2 voltage acquisition monitoring module I (36), the anode of a No. 2 unidirectional DC/DC module (37), one end of a No. 2 anode contactor (41), one end of a No. 2 pre-charging contactor (39), one end of a No. 2 emergency charging fuse (40) and one end of a No. 2 current acquisition monitoring module II (49), the other end of the 2# positive electrode contactor (41) is respectively connected with the other end of the 2# pre-charging resistor (42), the positive electrode of the 2# voltage acquisition monitoring module II (43) and a 2# total positive output interface (48);

the other end of the No. 2 pre-charging contactor (39) is connected with one end of a No. 2 pre-charging resistor (42),

the other end of the 2# emergency charging fuse (40) is connected with a 2# positive emergency charging interface (47);

the other end of the second 2# current acquisition monitoring module (49) is connected with the anode of the second 2# anti-mutual-charging diode (50), the cathode of the second 2# anti-mutual-charging diode (50) is connected with one end of a second 2# auxiliary power supply output fuse (51), the other end of the second 2# auxiliary power supply output fuse (51) is connected with one end of a second 2# auxiliary power supply output contactor (52), the other end of the second 2# auxiliary power supply output contactor (52) is connected with one end of a second 2# battery pack parallel connector (53), and the other end of the second 2# battery pack parallel connector (53) is connected with the auxiliary power supply output interface (30);

the 2# BMS battery management system (54) is respectively connected with a 2# lithium titanate battery pack (31), a 2# negative electrode fuse (32), a 2# positive electrode fuse (33), a 2# current collection monitoring module I (35), a 2# voltage collection monitoring module I (36), a 2# negative electrode contactor (38), a 2# pre-charging contactor (39), a 2# positive electrode contactor (41), a 2# voltage collection monitoring module II (43), a 2# communication interface (46), a 2# current collection monitoring module II (49), a 2# mutual charging prevention diode (50), a 2# auxiliary power supply output fuse (51) and a 2# auxiliary power supply output contactor (52);

the 1# lithium titanate battery pack (1) is connected with a vehicle-mounted charging and discharging DC/DC through a 1# total negative output interface (14) and a 1# total positive output interface (18), the 2# lithium titanate battery pack (31) is connected with the vehicle-mounted charging and discharging DC/DC through a 2# total negative output interface (44) and a 2# total positive output interface (48), the 1# lithium titanate battery pack (1) is used for storing electric energy, the 1# total negative output interface (14) and the 1# total positive output interface (18) are used for supplying power to a train direct current bus to carry out non-network self-walking, the 2# lithium titanate battery pack (31) is used for storing electric energy, and the 2# total negative output interface (44) and the 2# total positive output interface (48) are used for supplying power to the train direct current bus to carry out non-network self-walking; the 1# lithium titanate battery pack (1) and the 2# lithium titanate battery pack (31) are also used for supplying power to an auxiliary power supply of a train through an auxiliary power supply output interface (30);

the 1# total negative output interface (14) and the 1# total positive output interface (18) are used for supplying power to a train direct-current bus and also used for charging the 1# lithium titanate battery pack (1);

the 2# total negative output interface (44) and the 2# total positive output interface (48) are used for supplying power to a train direct-current bus and also used for charging a 2# lithium titanate battery pack (31);

the 1# negative electrode emergency charging interface (15) and the 1# positive electrode emergency charging interface (17) are used for carrying out emergency charging on the 1# lithium titanate battery pack (1), and the 2# negative electrode emergency charging interface (45) and the 2# positive electrode emergency charging interface (47) are used for carrying out emergency charging on the 2# lithium titanate battery pack (31);

the 1# negative fuse (2), the 1# positive fuse (3), the 1# emergency charging fuse (10), the 1# auxiliary power supply output fuse (21), the 2# negative fuse (32), the 2# positive fuse (33), the 2# emergency charging fuse (40) and the 2# auxiliary power supply output fuse (51) are used for carrying out overload and short-circuit protection on a circuit of the wireless self-walking storage battery and the auxiliary converter system;

the 1# circuit breaker (4) and the 2# circuit breaker (34) are used for carrying out overload and short-circuit protection on circuits of the netless self-walking storage battery and the auxiliary converter system, and isolating the voltage of the lithium titanate battery pack during maintenance, so that personal safety is ensured, and external output is manually cut off;

the 1# current collection monitoring module I (5) and the 1# current collection monitoring module II (19) are used for isolating the high voltage of the 1# lithium titanate battery pack (1) from the low voltage of a sampling power supply, sampling the charging and discharging current of the 1# lithium titanate battery pack (1), and transmitting the current data to the 1# BMS battery management system (24);

the 2# current collection monitoring module I (35) and the 2# current collection monitoring module II (49) are used for isolating the high voltage of the 2# lithium titanate battery pack (31) from the low voltage of a sampling power supply, sampling the charge and discharge current of the 2# lithium titanate battery pack (31), and transmitting the current data to a 2# BMS battery management system (54);

the 1# voltage acquisition monitoring module I (6) and the 1# voltage acquisition monitoring module II (13) are used for sampling the internal total pressure and the external total pressure of the 1# lithium titanate battery pack (1) and transmitting voltage data to a 1# BMS battery management system (24);

the 2# voltage acquisition monitoring module I (36) and the 2# voltage acquisition monitoring module II (43) are used for sampling the internal total pressure and the external total pressure of the 2# lithium titanate battery pack (31) and transmitting voltage data to a 2# BMS battery management system (54);

the 1# unidirectional DC/DC module (7) is used for adjusting the voltage of the 1# lithium titanate battery pack (1) to a voltage suitable for the 1# BMS battery management system (24) and the auxiliary load of the train to work; under the condition that auxiliary power supply of the train cannot be provided, the 1# BMS battery management system (24) is put into operation, and the 1# BMS battery management system (24) which is put into operation is used for controlling the 1# lithium titanate battery pack (1) to output electric energy through the 1# total negative output interface (14) and the 1# total positive output interface (18), so that the train can normally work under the condition of no auxiliary power supply;

the 2# unidirectional DC/DC module (37) is used for adjusting the voltage of the 2# lithium titanate battery pack (31) to a voltage suitable for the 2# BMS battery management system (54) and the auxiliary load of the train to work; when the auxiliary power supply of the train cannot be provided, the 2# BMS battery management system (54) is put into operation, and the 2# BMS battery management system (54) which is put into operation is used for controlling the 2# lithium titanate battery pack (31) to output electric energy through the 2# total negative output interface (44) and the 2# total positive output interface (48), so that the train can normally operate without the auxiliary power supply;

the 1# negative electrode contactor (8) and the 1# positive electrode contactor (11) are used for switching on and off a charge-discharge loop of the 1# lithium titanate battery pack (1);

the 2# negative electrode contactor (38) and the 2# positive electrode contactor (41) are used for switching on and off a charge-discharge loop of the 2# lithium titanate battery pack (31);

the 1# pre-charging contactor (9) and the 1# pre-charging resistor (12) are used for pre-charging the 1# lithium titanate battery pack (1);

the 2# pre-charging contactor (39) and the 2# pre-charging resistor (42) are used for pre-charging the 1# lithium titanate battery pack (31);

the 1# communication interface (16) is an interface for interaction and control of external information of a 1# BMS battery management system (24), the train network sends an instruction to the 1# communication interface (16), the 1# BMS battery management system (24) is used for responding to the instruction to control the wireless self-walking storage battery and the auxiliary converter system, and the 1# BMS battery management system (24) is also used for sending storage battery state information to the train through the 1# communication interface (16);

the 2# communication interface (46) is a 2# BMS battery management system (54) external information interaction and control interface, the train network sends an instruction to the 2# communication interface (46), the 2# BMS battery management system (54) is used for responding to the instruction to control the wireless self-walking storage battery + auxiliary converter system, and the 2# BMS battery management system (54) is also used for sending storage battery state information to the train through the 2# communication interface (46);

the 1# mutual charging prevention diode (20) and the 2# mutual charging prevention diode (50) are used for preventing the 1# lithium titanate battery pack (1) and the 2# lithium titanate battery pack (31) from being charged and discharged mutually;

the 1# auxiliary power supply output contactor (22) is used for switching on and off a discharge loop of the 1# lithium titanate battery pack (1);

the 2# auxiliary power supply output contactor (52) is used for switching on and off a discharge loop of the 2# lithium titanate battery pack (31);

the 1# battery pack parallel connector (23) and the 2# battery pack parallel connector (53) are used for connecting the positive electrode of the 1# lithium titanate battery pack (1) and the positive electrode of the 2# lithium titanate battery pack (31) in parallel;

the 1# BMS battery management system (24) is used for collecting information of a 1# lithium titanate battery pack (1), a 1# negative fuse (2), a 1# positive fuse (3), a 1# current collection monitoring module I (5), a 1# voltage collection monitoring module I (6), a 1# negative contactor (8), a 1# pre-charging contactor (9), a 1# emergency charging fuse (10), a 1# positive contactor (11), a 1# pre-charging resistor (12), a 1# voltage collection monitoring module II (13), a 1# communication interface (16), a 1# current collection monitoring module II (19), a 1# mutual charging prevention diode (20), a 1# auxiliary power output fuse (21), a 1# auxiliary power output contactor (22) and a 2# BMS battery management system (54), processing the information, and then controlling, protecting, The alarm lamp acts; meanwhile, the 1# BMS battery management system (24) is also used for controlling the connection and disconnection of a 1# negative electrode contactor (8), a 1# pre-charging contactor (9), a 1# positive electrode contactor (11) and a 1# auxiliary power supply output contactor (22); meanwhile, the 1# BMS battery management system (24) is also used for feeding back alarm information and state information of the netless self-walking storage battery and the auxiliary converter system to the train network;

the 2# BMS battery management system (54) is used for acquiring information of a 2# lithium titanate battery pack (31), a 2# negative electrode fuse (32), a 2# positive electrode fuse (33), a 2# current acquisition monitoring module I (35), a 2# voltage acquisition monitoring module I (36), a 2# negative electrode contactor (38), a 2# pre-charging contactor (39), a 2# emergency charging fuse (40), a 2# positive electrode contactor (41), a 2# pre-charging resistor (42), a 2# voltage acquisition monitoring module II (43), a 2# communication interface (46), a 2# current acquisition monitoring module II (49), a 2# mutual charging prevention diode (50), a 2# auxiliary power supply output fuse (51), a 2# auxiliary power supply output contactor (52) and a 1# BMS battery management system (24), processing the information, and then performing control, protection and alarm lamp action; meanwhile, the 2# BMS battery management system (54) is also used for controlling the on-off of the 2# negative contactor (38), the 2# pre-charging contactor (39), the 2# positive contactor (41) and the 2# auxiliary power supply output contactor (52); and meanwhile, the 2# BMS battery management system (54) is also used for feeding back alarm information and state information of the netless self-walking storage battery and the auxiliary converter system to the train network.

2. The netless self-walking storage battery + auxiliary converter system for rail transit as claimed in claim 1, wherein the lithium titanate batteries 1 and 31 have high energy density, high multiplying power, no memory effect and good low-temperature performance and safety performance.

3. The netless self-propelled battery + auxiliary converter system for rail transit according to claim 1, wherein the # 1 negative contactor (8), the # 1 pre-charging contactor (9), the # 1 positive contactor (11), the # 1 auxiliary power output contactor (22), the # 2 negative contactor (38), the # 2 pre-charging contactor (39), the # 2 positive contactor (41) and the # 2 auxiliary power output contactor (52) are wide-range and high-capacity contactors for railway, have bidirectional arc extinguishing capability, and have main contacts without distinguishing positive and negative contactors.

4. The netless self-propelled battery + auxiliary converter system for rail transit as claimed in claim 1, wherein the 1# BMS battery management system (24) and the 2# BMS battery management system (54) employ rail transit-specific BMS.

5. The netless self-propelled battery + auxiliary converter system for rail transit as claimed in claim 1, wherein when no auxiliary power supply is provided externally, after the 1# BMS battery management system (24) receives the closing commands of the 1# positive contactor (11) and the 1# negative contactor (8), the 1# BMS battery management system (24) provides the auxiliary power supply for the 1# BMS battery management system (24) by using the 1# unidirectional DC/DC module (7);

after the 2# BMS battery management system (54) receives the closing commands of the 2# positive contactor (41) and the 2# negative contactor (38), the 2# BMS battery management system (54) uses the 2# unidirectional DC/DC module (37) to provide auxiliary power for the 2# BMS battery management system (54).

6. The netless self-walking storage battery + auxiliary converter system for rail transit as claimed in claim 1, wherein the auxiliary power output interface (30) directly provides power supply for the train SIV auxiliary inverter to activate the train auxiliary power supply system in case of failure of normal input of the auxiliary battery pack of the train.

7. The netless self-traveling battery + auxiliary converter system for rail transit as claimed in claim 1, wherein the # 1 unidirectional DC/DC module (7) and the # 2 unidirectional DC/DC module (37) provide auxiliary power supply for the train when the train SIV auxiliary inverter fails; the netless self-walking storage battery and auxiliary converter system replace the form of the original SIV auxiliary inverter and auxiliary storage battery, and a redundant power supply mode is provided for the form of the original SIV auxiliary inverter and auxiliary storage battery.

8. The netless self-walking storage battery + auxiliary converter system for rail transit as claimed in claim 1, wherein the # 1 lithium titanate battery pack (1), the # 1 negative fuse (2), the # 1 positive fuse (3), the # 1 circuit breaker (4), the # 1 current collection monitoring module I (5), the # 1 voltage collection monitoring module I (6), the # 1 unidirectional DC/DC module (7), the # 1 negative contactor (8), the # 1 pre-charging contactor (9), the # 1 emergency charging fuse (10), the # 1 positive contactor (11), the # 1 pre-charging resistor (12), the # 1 voltage collection monitoring module II (13), the # 1 total negative output interface (14), the # 1 negative emergency charging interface (15), the # 1 communication interface (16), the # 1 positive emergency charging interface (17), the # 1 total positive output interface (18), The 1# current acquisition monitoring module II (19), the 1# mutual charging prevention diode (20), the 1# auxiliary power supply output fuse (21), the 1# auxiliary power supply output contactor (22), the 1# battery pack parallel connector (23), the 1# BMS battery management system (24) and the auxiliary power supply output interface (30) can form a group of independent netless self-walking storage battery + auxiliary converter system;

2# lithium titanate group (31), 2# negative pole fuse (32), 2# positive pole fuse (33), 2# circuit breaker (34), 2# current collection monitoring module one (35), 2# voltage collection monitoring module one (36), 2# one-way DC/DC module (37), 2# negative pole contactor (38), 2# pre-charging contactor (39), 2# emergency charging fuse (40), 2# positive pole contactor (41), 2# pre-charging resistor (42), 2# voltage collection monitoring module two (43), 2# total negative output interface (44), 2# negative pole emergency charging interface (45), 2# communication interface (46), 2# positive pole emergency charging interface (47), 2# total positive output interface (48), 2# current collection monitoring module two (49), 2# anti-mutual charging diode (50), 2# auxiliary power output fuse (51), The 2# auxiliary power output contactor (52), the 2# battery pack parallel connector (53), the 2# BMS battery management system (54) and the auxiliary power output interface (30) can form another independent netless self-propelled battery + auxiliary converter system.