CN114572120A - Switch box of double-source trolley bus - Google Patents
Switch box of double-source trolley bus Download PDFInfo
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- CN114572120A CN114572120A CN202011372894.9A CN202011372894A CN114572120A CN 114572120 A CN114572120 A CN 114572120A CN 202011372894 A CN202011372894 A CN 202011372894A CN 114572120 A CN114572120 A CN 114572120A
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- 238000009413 insulation Methods 0.000 claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 239000006096 absorbing agent Substances 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a switch box of a double-source trolley bus, which comprises a box body and a whole vehicle controller arranged in the box body; the intelligent control system comprises a plurality of functional modules arranged in the box body, wherein the functional modules are connected with the vehicle control unit through a CAN network, and each functional module respectively realizes a pre-charging function, an off-line alarming function, an electric energy metering function, an insulation monitoring function and a high-voltage sampling function. The invention integrates the functions of pre-charging, vehicle control, off-line alarm, electric energy metering, insulation detection and high-voltage sampling, improves the reliability of the switch box through multiple protection, and enhances the transmission of control signals in the vehicle through the interference absorber.
Description
Technical Field
The invention relates to a switch box of a double-source trolley bus, belonging to the field of trolley bus equipment.
Background
At present, a plurality of double-source trolley buses for the first-line cities are still used as urban buses. Compared with a pure electric vehicle, the standard of the electric vehicle is gradually improved, and the internal parts of the pure electric vehicle are more and more refined. The switch box of the existing trolley bus has low space utilization rate, simple function and many fault points, and simultaneously needs to be improved in the aspects of safety, vibration, compact structure and the like, so that the development of the switch box with compact structure, excellent compatibility, high integration level and safety and reliability is particularly important.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a switch box of a double-source trolley bus, which is integrated with a pre-charging function, a whole bus control function, an off-line alarm function, an electric energy metering function, an insulation detection function and a high-voltage sampling function, improves the reliability of the switch box through multiple protection, and enhances the transmission of control signals in the whole bus through an interference absorber.
The invention provides a switch box of a double-source trolley bus, which comprises:
the box body is provided with a plurality of air inlets,
the vehicle control unit is arranged in the box body;
the intelligent control system comprises a plurality of functional modules arranged in a box body, wherein the functional modules are connected with a vehicle control unit through a CAN network, and each functional module respectively realizes a pre-charging function, an off-line alarm function, an electric energy metering function, an insulation monitoring function and a high-voltage sampling function.
In a further improvement of the present invention, the functional module includes a pre-charging module for performing a pre-charging function, the pre-charging module includes a main contactor, a pre-charging contactor, and a pre-charging resistor,
the pre-charging resistor limits the charging current of the main loop capacitor, and when the voltage of the main loop capacitor is close to the voltage of a battery or the voltage of a line network, the pre-charging contactor is disconnected, and the main contactor is closed to complete pre-charging.
A further improvement of the invention is that the functional module comprises an offline warning module for implementing an offline warning function.
The further improvement of the invention lies in that the functional module also comprises an electric energy metering module for realizing the electric energy metering function, and the electric energy metering module is connected with a voltage sensor and a current sensor which are arranged at the end of a line network, a voltage sensor and a current sensor which are arranged at the end of a battery, and a voltage sensor and a current sensor which are arranged at the end of a load.
The invention is further improved in that the functional module further comprises an insulation monitoring module for realizing the insulation monitoring function, and the insulation monitoring module comprises an insulation detector for detecting the insulation condition between the main loop and the vehicle body when the vehicle runs.
The invention is further improved in that the functional module comprises a high-voltage sampling module for realizing a high-voltage sampling function, and the high-voltage sampling module comprises a plurality of high-voltage sampling interfaces for collecting the voltage of the battery or the wire network for other components.
The invention has the further improvement that a main loop protection system is arranged on the box body, and the main loop protection system comprises a fast fuse, an anti-reverse diode and a resistance-capacitance absorber.
The invention is further improved in that a radiator is arranged on the side surface of the box body.
The invention is further improved in that interference absorbers are arranged at the positive and negative input ends of the box body.
The invention is further improved in that a positive rod contactor is arranged in the box body.
Compared with the prior art, the invention has the advantages that:
the switch box of the double-source trolley bus provided by the invention integrally comprises a pre-charging function, a whole bus control function, an off-line alarm function, an electric energy metering function, an insulation detection function and a high-voltage sampling function, the reliability of the switch box is improved through multiple protection, and the transmission of control signals in the whole bus is enhanced through an interference absorber.
The switch box of the double-source trolley bus has the advantages of multifunction, high integration level, safety and reliability, and can normally work in a 600V/750V wire net mode or a battery mode within a wide voltage working range.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a switch box of a dual-source trolley bus according to an embodiment of the invention, which shows a top view;
fig. 2 is a schematic structural diagram of a switch box of a dual-source trolley bus according to an embodiment of the present invention, which shows a state of looking up;
fig. 3 is a schematic structural diagram of a switch box of the dual-source trolley bus according to the embodiment of the invention, which shows a state of a left side view;
fig. 4 is a schematic structural diagram of a switch box of the dual-source trolley bus according to the embodiment of the invention, which shows a state of a right side view;
fig. 5 is a schematic circuit diagram of a switch box of a dual-source trolley bus according to an embodiment of the present invention;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the device comprises a box body, 2, a radiator, 3, a vehicle control unit, 4, a offline protection board, 5, a high-voltage connector, 6, a pre-charging resistor, 7, an anti-reverse diode, 8, a resistance-capacitance absorption device, 9, an indicator lamp, 10, a charging contactor, 11, a main contactor, 12, a wire mesh contactor, 13, a battery contactor, 14, an interference contactor, 15, a voltage sensor, 16, a fast fuse, 17, an electric energy metering module, 18, an insulation monitoring module, 19, a pre-charging contactor, 20 and a current sensor.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, the following describes exemplary embodiments of the present invention in further detail with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and are not exhaustive of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
Fig. 1 schematically shows a switch box of a dual-source trolley bus according to an embodiment of the invention, which comprises a box body 1. The box body 1 is of a cuboid structure and comprises a cover plate arranged at the upper end and the lower end of the box body 1. The vehicle control device 3 is arranged in the box body 1 and used for controlling each functional module and realizing the vehicle control function. A plurality of functional modules in the box body 1 are connected with the vehicle control unit 3 through a CAN network, and each functional module is used for respectively realizing a pre-charging function, an off-line alarming function, an electric energy metering function, an insulation monitoring function and a high-voltage sampling function.
In one embodiment, the functional module includes a pre-charge module for performing a pre-charge function. The pre-charging function means that when a battery or a wire mesh supplies power to a rear-end load through a switch box, the rear-end load is provided with a capacitor, if the main contactor 11 is directly closed, a loop can generate large current to damage other components, and the pre-charging function plays a role in limiting current.
In this embodiment, the pre-charging module includes a main contactor 11, a pre-charging contactor and a pre-charging resistor 6, since the capacitance value of the capacitor in the main circuit is large, the pre-charging resistor 6 is required to limit the current to charge the capacitor in the main circuit, when the voltage of the capacitor in the main circuit approaches the battery voltage or the net voltage, the pre-charging contactor 19 is turned off, and the main contactor 11 is turned on to complete the pre-charging.
In one embodiment, the function module further comprises an offline alarm module for realizing an offline alarm function, wherein the offline alarm module comprises an offline protection board, and the offline protection board is communicated with an alarm of a cab. The off-line protection board carries out logic judgment, when the vehicle is in a wire network mode, the voltage value of the voltage sensor 15 of the wire network is used for judging, and when the voltage is within a certain time and the voltage value is lower than 200V, the off-line protection board outputs a 24V switching value to an alarm to give an alarm prompt.
In one embodiment, the function module further comprises an electric energy metering module 17, and the electric energy metering module 17 is used for realizing an electric energy metering function. In the present embodiment, the electric energy metering module 17 is further connected to a voltage sensor 15 and a current sensor 20 provided at the line network side, a voltage sensor 15 and a current sensor 20 provided at the battery side, and a voltage sensor 15 and a current sensor 20 provided at the load side. And output signals of the voltage and current sensors at the wire network end, the voltage and current sensors at the battery end and the voltage and current sensors at the load end are transmitted to the electric energy metering module 17 for power calculation, and the energy consumption of the whole vehicle and components is calculated.
In one embodiment, the functional modules further include an insulation monitoring module 18, the insulation monitoring module 18 being configured to perform an insulation monitoring function. The insulation monitoring module 18 comprises an insulation detector, the insulation of the whole system main loop and the vehicle body is detected in real time when the vehicle runs through the insulation detector, and when the insulation resistance is lower than a specific value, the vehicle is started to protect so as to ensure the safety of passengers.
In one embodiment, the functional module further comprises a high voltage sampling module for implementing a high voltage sampling function. The high-voltage sampling function refers to that a high-voltage sampling interface is provided in the switch box so that the rest parts can collect the voltage of the battery or the wire network for reference. Such as the UN +/F +/BN + interface of the schematic.
In one embodiment, the functional module further comprises a power distribution system for implementing power distribution functions, the power distribution system including power distribution to the motor controller, 2 DC/AC power supplies (oil pump DC/AC and air pump DC/AC, respectively), the DC/DC power supplies, the fan, and the remaining auxiliary power supplies (electrical heating, electrical air conditioning, electrical defrost).
An alternating current contactor and a three-phase filter are further arranged in the box body 1, current ripples are reduced mainly when a cooling fan of the motor controller is used for power distribution, and meanwhile the temperature of the motor controller is controlled through a switch of the alternating current contactor. The box body 1 is also internally provided with a charging contactor 10, the charging contactor 10 is used for the work of a high-power DC/DC direct-current converter, when the converter charges a battery, and the contactor provides protection during charging for preventing the damage to the battery when the converter breaks down.
In one embodiment, the box 1 is provided with a main circuit protection system, which includes a fast fuse 16, an anti-reverse diode 7, and a resistance-capacitance absorber 8 (as shown in fig. 4), and functions to ensure that damage to a component does not affect the main circuit.
The reverse prevention diode 7 prevents current from flowing back to the wire network when the battery voltage is higher than the wire network voltage. The fast fuse 16 is a fuse that blows rapidly when an overcurrent occurs in the main circuit, protecting the remaining components of the main circuit. The resistance-capacitance absorption 8 can absorb partial voltage of the device, and damage caused by overvoltage of the device is avoided.
In one embodiment, the side surface of the box body 1 is provided with the radiator 2, the radiator 2 is preferably a natural air cooling radiator 2, the calorific value of the switch box component is calculated, and thermal simulation is performed on computer software, so that the structure can be simplified while the heat dissipation of a power device is ensured, the cost is reduced, and the reliability is higher than that of a forced air cooling radiator 2.
In one embodiment, the box body 1 is made of sheet metal, and the box body 1 and the cover plate are sealed by a Rogers HT-800 sealing gasket to reach the IP67 protection grade. Reinforcing ribs are welded on the inner side of the box body 1 and the mounting support legs, so that the vibration resistance of the whole machine is improved.
In this embodiment, as shown in fig. 2 and 3, the vehicle control unit 3 and the off-line protection board 4 are disposed on one side of the box body 1, and the pre-charging resistor 6, the anti-reverse diode and the resistance-capacitance absorption are disposed on the other side; the other components are regularly arranged inside the case 1. The side of the box body 1 is also provided with a plurality of indicator lamps 9 to indicate different states. The side wall of the box body 1 is also provided with the radiator 2. A plurality of high-voltage connectors 5 are arranged below the box body 1 and respectively comprise an input positive interface, an input negative interface, an output positive interface, an output negative interface, a front end voltage interface, a battery positive interface, a battery negative interface, an auxiliary system negative interface, a DC/DC converter input positive interface, a DC/DC converter input interface and the like.
In this embodiment, add the interference absorber at the positive negative input both ends of switch box, the high-voltage cable then adopts double-deck shielding cable, and switch box high-voltage connector all adopts metal shielding water joint, and the high-voltage line is whole to take double-deck shielding both ends mode ground connection to shield the department. The interference absorber CAN increase the interference killing feature at the switch box during operation, and the guarantee CAN communication is good.
In one embodiment, a positive pole contactor (the setting position is shown in fig. 5) is arranged in the box body 1, when the vehicle is in the wire mesh mode, the positive pole contactor is used for separating the electric pole from the wire mesh and firstly passing through the wire mesh positive contactor to separate the main loop of the system from the wire mesh, so that the phenomenon of arc discharge caused by the fact that current is input from the wire mesh when the vehicle descends is avoided.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (10)
1. The utility model provides a switch box of two source trolley bus which characterized in that includes:
a box body;
the vehicle control unit is arranged in the box body; and
the intelligent control system comprises a plurality of functional modules arranged in the box body, wherein the functional modules are connected with the vehicle control unit through a CAN network, and each functional module respectively realizes a pre-charging function, an off-line alarming function, an electric energy metering function, an insulation monitoring function and a high-voltage sampling function.
2. The switch box of a dual-source trackless trolley according to claim 1, wherein the function module includes a pre-charge module for performing a pre-charge function, the pre-charge module including a main contactor, a pre-charge contactor, and a pre-charge resistor,
the pre-charging resistor limits the charging current of the main loop capacitor, and when the voltage of the main loop capacitor is close to the voltage of a battery or the voltage of a line network, the pre-charging contactor is disconnected, and the main contactor is closed to complete pre-charging.
3. A switch box of a dual-source trolley bus according to claim 1 or 2, wherein the function module includes an off-line alarm module for implementing an off-line alarm function.
4. The switch box of the dual-source trolley bus according to any one of claims 1 to 3, wherein the function module further comprises an electric energy metering module for realizing an electric energy metering function, and the electric energy metering module is connected with a voltage sensor and a current sensor arranged on a line network side, a voltage sensor and a current sensor arranged on a battery side, and a voltage sensor and a current sensor arranged on a load side.
5. A switch box of a double-source trolley bus according to any one of claims 1 to 4, characterized in that the function module further comprises an insulation monitoring module for realizing an insulation monitoring function, and the insulation monitoring module comprises an insulation detector for detecting the insulation condition between the main loop and the bus body when the vehicle runs.
6. A switch box of a dual-source trolley bus according to any one of claims 1 to 5, characterized in that the function module comprises a high voltage sampling module for implementing a high voltage sampling function, the high voltage sampling module comprises a plurality of high voltage sampling interfaces for collecting battery or line network voltage for other components.
7. A switch box of a double-source trolley bus as claimed in any one of claims 1 to 6, wherein a main loop protection system is arranged on the box body, and the main loop protection system comprises a fast fuse, an anti-reverse diode and a resistance-capacitance absorption.
8. A switch box for a dual-source trolley bus according to claim 7, wherein a radiator is provided on a side of the box body.
9. A switch box for a dual-source trolley bus according to claim 8, wherein interference absorbers are provided at both ends of the positive and negative inputs of the box body.
10. A switch box for a dual-source trolley bus according to claim 9, wherein a positive contactor is provided in the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011372894.9A CN114572120A (en) | 2020-11-30 | 2020-11-30 | Switch box of double-source trolley bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011372894.9A CN114572120A (en) | 2020-11-30 | 2020-11-30 | Switch box of double-source trolley bus |
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| Publication Number | Publication Date |
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| CN114572120A true CN114572120A (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011372894.9A Pending CN114572120A (en) | 2020-11-30 | 2020-11-30 | Switch box of double-source trolley bus |
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| CN211239790U (en) * | 2019-12-17 | 2020-08-11 | 浙江华电乌溪江水力发电有限公司 | Photovoltaic conflux case monitoring facilities |
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2020
- 2020-11-30 CN CN202011372894.9A patent/CN114572120A/en active Pending
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|---|---|---|---|---|
| CN2618268Y (en) * | 2003-02-18 | 2004-05-26 | 黄叙银 | Shielded controlling cable |
| CN105774558A (en) * | 2016-03-17 | 2016-07-20 | 北京航空航天大学 | Integrated safety detection device for electric automobile |
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