CN109017337B - Whole vehicle controller of double-source trolley bus and battery balance starting method - Google Patents

Whole vehicle controller of double-source trolley bus and battery balance starting method Download PDF

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Publication number
CN109017337B
CN109017337B CN201710439962.0A CN201710439962A CN109017337B CN 109017337 B CN109017337 B CN 109017337B CN 201710439962 A CN201710439962 A CN 201710439962A CN 109017337 B CN109017337 B CN 109017337B
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Prior art keywords
battery
equalization
vehicle
balance
station
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CN109017337A (en
Inventor
赵清
王斌刚
李振山
徐阳
赵亚涛
王亚松
张春敏
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Zhengzhou Yutong Bus Co Ltd
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Zhengzhou Yutong Bus Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The invention relates to a vehicle control unit of a double-source trolley bus and a battery equalization opening method, wherein a BMS is not adopted to judge whether battery equalization charging is opened, but the vehicle control unit judges whether an equalization identification position is effective according to a station identification, a network hanging signal and a vehicle speed of a vehicle, and when the equalization identification position is effective, battery equalization is opened; when the balance purpose is achieved, the consistency of the vehicle state can be guaranteed, and the driving safety is guaranteed.

Description

Whole vehicle controller of double-source trolley bus and battery balance starting method
Technical Field
The invention belongs to the field of electric automobiles, and particularly relates to a whole vehicle controller of a double-source trolley bus and a battery balance starting method.
Background
The pure electric bus applies an electric driving technology, meets the requirements of energy conservation and environmental protection, but the development of the pure electric bus is restricted by the short driving range, the high-capacity battery and the capital construction cost of the charging station. The trolley bus can realize net-hanging pure electric driving of vehicles, but has strong dependence on a wire net, and can not be off-line for operation, so that the development of the trolley bus is also restricted. Therefore, a dual-source trackless pure electric vehicle combining a wire grid energy source or other energy source and a pure electric battery energy source is of great interest. The double-source trolley bus can run by separating from a trolley bus power grid, is driven by a vehicle-mounted power supply in a wireless network section, and simultaneously charges the vehicle-mounted power supply by using a vehicle-mounted charger to supplement energy consumed by the vehicle-mounted power supply in time; and in the section with the overhead wire net, the electric vehicle continues to run by using the wire net. The vehicle is mainly characterized in that the vehicle-mounted power supply starts to automatically charge as long as the trolley pole contacts the power grid, the vehicle-mounted power supply does not need to be charged particularly, the power grid can be used for charging in the running process, the problems of long charging time, trouble in battery replacement and the like of a pure electric vehicle are solved, a charging pile does not need to be arranged, time and labor are saved, and the cost is saved.
In the prior art, a Battery Management System (BMS) is used for controlling the battery balance state of the double-source trolley bus, the technical levels of all suppliers of the BMS are different, the technical levels of software technicians are also different, the transmission modes of lifting bow signals of various vehicles are different, the BMS is possibly misjudged, the driving state is caused to enter a balance mode, and therefore under the condition that the SOC of the vehicle is higher, the electric braking performance of the vehicle under the driving state is weakened, and the safe operation of the vehicle is influenced.
In addition, in the conventional double-source trolley bus, the BMS controls the wire net contactor and the BMS requests the isolated DC-DC to be charged, but the wire net contactor is disconnected when the BMS does not request, the contactor is frequently opened, the service life of the contactor is shortened, and safety accidents such as relay ablation and the like are possibly caused by frequent load cut-off.
Disclosure of Invention
The invention aims to provide a whole vehicle controller of a double-source trolley bus and a battery equalizing starting method, which are used for solving the problem of BMS misjudgment caused by the fact that the BMS controls the battery equalizing charging starting condition by adopting the BMS in the existing double-source trolley bus.
In order to solve the technical problem, the invention provides a battery equalization opening method of a double-source trolley bus, which comprises the following steps: detecting whether the electric car enters a field or hangs a net, and detecting the speed of the electric car; and when the electric car enters a field and is connected with a network, and the speed of the electric car is zero, starting the battery equalization.
When the electric car enters a field and is connected with a network, and the speed is zero, judging that the balanced identification position of the battery balance is effective; and when the equalization identification bit is effective, receiving an equalization identification bit signal by the battery management system and controlling to start battery equalization.
After the battery is started in a balanced manner, when the real charge state of the battery pack reaches the set charge state, the battery management system controls the battery to be balanced for the set time; and when the battery balance is finished, the battery management system sends a balance finishing identifier to the whole vehicle controller.
The method also comprises the step that the vehicle control unit controls the instrument display of the vehicle to be balanced.
In order to solve the above technical problem, the present invention further provides a vehicle controller for a dual-source trolley bus, including a charging start unit: the system is used for detecting and judging whether the electric car enters a field, hangs a net and the speed of the electric car; and when the electric car enters a field and is connected with a network, and the speed of the electric car is zero, starting the battery equalization.
The charging starting unit is used for judging that the balanced identification bit of the battery is effective when the electric car enters a field and is connected with a network and the speed is zero; and when the equalization identification bit is effective, receiving an equalization identification bit signal by a battery management system, and controlling the charging starting unit to start battery equalization.
After the charging starting unit starts the battery equalization, when the real charge state of the battery pack reaches the set charge state, the battery management system controls the battery equalization to reach the set time; and when the battery balance is finished, the battery management system sends a balance finishing identifier to the whole vehicle controller.
The device also comprises a unit for controlling the vehicle instrument to display the equilibrium state of the battery pack.
The invention has the beneficial effects that: the battery equalizing charge is judged whether to be started or not by the BMS, the vehicle controller judges whether the equalizing mark is effective or not according to the station mark, the net hanging signal and the vehicle speed of the vehicle, and the battery equalization is started when the equalizing mark is effective. When the balance purpose is achieved, the consistency of the vehicle state can be guaranteed, and the driving safety is guaranteed.
Drawings
FIG. 1 is a prior art solution logic block diagram;
fig. 2 is a logic block diagram of the improved technical scheme.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The embodiment of the battery balance starting method of the double-source trolley bus comprises the following steps:
as shown in fig. 2, the network cable is connected with the isolated DC-DC through a trolley pole, the isolated DC-DC is connected with the battery management system through a CAN network, the power battery slave board is connected with the battery management system, the battery management system is connected with the vehicle control unit, the vehicle control unit is connected with the instrument, the vehicle control unit is connected with the isolated DC-DC through the CAN, and the in-plant network and the station identifier are connected and interacted with the vehicle control unit through the sensor.
When a vehicle enters a bus station, as long as the vehicle does not get off an ON fire, a wire mesh contactor of the vehicle keeps a running closed state and is not disconnected, a vehicle controller judges whether the vehicle passes the station mark or not through the station mark of the entering station, when the vehicle passes the station mark and receives a wire hanging signal, and the vehicle speed is zero, the vehicle controller sends an equalization mark bit to a battery management system, when the battery management system receives the equalization mark bit sent by the vehicle controller, an equalization strategy is started, the battery management system allows the vehicle to be charged to 95% at the moment, and three-stage current reduction processing is carried out at the charging end to prevent SOC jump caused by overlarge charging current, so that the vehicle cannot be charged to 95%, and the equalization purpose cannot be achieved, when the real SOC of the vehicle is charged to 95%, the charging request of the battery management system is 0, the equalization is started for 10 minutes, and when the battery management system judges that the battery pressure difference, and sending the balance completion identifier to the vehicle control unit, receiving the balance completion identifier sent by the battery management system by the vehicle control unit, sending the balance completion identifier to the instrument by the vehicle control unit, and powering off after the driver sees the instrument prompt.
In the process of driving and stopping the double-source trolley bus, the vehicle controller is used for judging whether the vehicle reaches an equalization condition or not and sending an identification position to the battery management system, the battery management system starts an equalization strategy, and after equalization is completed, an equalization completion identification is sent to the vehicle controller, the vehicle controller sends the equalization completion identification to the instrument, the instrument displays that the battery equalization is completed, and reminds a client that the vehicle can be safely powered off, and the instrument reminder can enable a vehicle user to make more clear the effectiveness of charge equalization.
The current request sequence adopted by the invention is that the BMS requests current to the vehicle controller, the vehicle controller requests isolation DC-DC, when the vehicle controller requests, the BMS executes a vehicle controller instruction, whether the DC-DC output is completely controlled by the vehicle controller, and the battery management system does not request charging after the vehicle is charged to 95%, the wire network contactor of the BMS can be always attracted, and the wire network contactor does not need to be frequently disconnected and attracted, so that the vehicle charging purpose is achieved, the problems of the service life shortening of the wire network contactor and the service life of the isolation DC-DC are effectively avoided, the strategy optimization of the vehicle is facilitated by adopting the battery equalization strategy of the vehicle controller, the inconsistency of the vehicle state is avoided, and the operation safety of the vehicle is ensured.
The invention discloses an embodiment of a whole vehicle controller of a double-source trolley bus, which comprises the following steps:
including the start unit that charges: the system is used for detecting and judging whether the electric car enters a field, hangs a net and the speed of the electric car; and when the electric car enters a field and is connected with a network, and the speed of the electric car is zero, starting the battery equalization.
The vehicle controller of the dual-source trolley bus in the above embodiment is actually a computer solution based on the method flow of the present invention, that is, a software framework, which can be applied to the dual-source trolley bus, and the above apparatus is a processing procedure corresponding to the method flow. The above-described method will not be described in detail since it is sufficiently clear and complete.

Claims (6)

1. A battery equalization opening method of a double-source trolley bus is characterized by comprising the following steps: when the electric car enters a bus station, a wire mesh contactor of the electric car keeps a running closed state and is not disconnected, the whole car controller detects whether the electric car enters the station or not through the station mark of the entering station, the whole car controller detects whether the wire mesh is hung in the wire mesh in the station or not, and the whole car controller detects the speed of the electric car; when the electric car enters a field and is connected with a network, and the speed is zero, the vehicle control unit judges that the balance identification bit for battery balance is effective, sends the balance identification bit to the battery management system, and controls to start battery balance when the battery management system receives the balance identification bit sent by the vehicle control unit.
2. The battery equalization opening method for the double-source trolley bus according to claim 1, wherein after the battery equalization opening, when the real state of charge of the battery pack reaches the set state of charge, the battery management system controls the battery equalization to reach the set time; and when the battery balance is finished, the battery management system sends a balance finishing identifier to the whole vehicle controller.
3. The battery equalization starting method for the double-source trolley bus as recited in claim 2, further comprising a step of controlling a meter of the vehicle by the vehicle control unit to display equalization completion.
4. The utility model provides a vehicle control unit of two source trolley bus which characterized in that, opens the unit including charging: when the electric car enters the bus station, the wire net contactor of the electric car keeps the closed state of the running car and is not disconnected, whether the electric car enters the station is detected and judged through the station mark of the entering station, whether the wire net is hung in the wire net in the station is detected, and the speed of the electric car is detected; when the electric car enters a field and is connected with a network, and the speed is zero, judging that the equalization identification bit for battery equalization is effective, sending the equalization identification bit to a battery management system, and controlling to start the battery equalization when the battery management system receives the equalization identification bit sent by the vehicle controller.
5. The vehicle controller of the dual-source trolley bus according to claim 4, wherein after the charging start unit starts the battery equalization, when the real state of charge of the battery pack reaches a set state of charge, the battery management system controls the battery equalization to a set time; and when the battery balance is finished, the battery management system sends a balance finishing identifier to the whole vehicle controller.
6. A vehicle control unit for a dual-source trolley bus according to claim 5, further comprising means for controlling a vehicle meter to display the battery pack equalization status.
CN201710439962.0A 2017-06-12 2017-06-12 Whole vehicle controller of double-source trolley bus and battery balance starting method Active CN109017337B (en)

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Application Number Priority Date Filing Date Title
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CN109017337B true CN109017337B (en) 2020-10-20

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101580024A (en) * 2009-06-18 2009-11-18 上海交通大学 Station charging type public transportation trolley bus system receiving power in transverse and lateral direction
WO2011019127A1 (en) * 2009-08-11 2011-02-17 대호전자(주) Circuit for the selective low-speed and low-voltage charging of a battery
CN102355031A (en) * 2011-10-29 2012-02-15 重庆大学 Active equalizing charging method and device for LiFePO4 power battery packs
CN104009526A (en) * 2014-06-16 2014-08-27 安徽安凯汽车股份有限公司 Active equalization system and method of power battery packs of electric bus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101580024A (en) * 2009-06-18 2009-11-18 上海交通大学 Station charging type public transportation trolley bus system receiving power in transverse and lateral direction
WO2011019127A1 (en) * 2009-08-11 2011-02-17 대호전자(주) Circuit for the selective low-speed and low-voltage charging of a battery
CN102355031A (en) * 2011-10-29 2012-02-15 重庆大学 Active equalizing charging method and device for LiFePO4 power battery packs
CN104009526A (en) * 2014-06-16 2014-08-27 安徽安凯汽车股份有限公司 Active equalization system and method of power battery packs of electric bus

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