CN108725233B - Battery management system with full time monitoring and vehicle management system - Google Patents
Battery management system with full time monitoring and vehicle management system Download PDFInfo
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- CN108725233B CN108725233B CN201710284517.1A CN201710284517A CN108725233B CN 108725233 B CN108725233 B CN 108725233B CN 201710284517 A CN201710284517 A CN 201710284517A CN 108725233 B CN108725233 B CN 108725233B
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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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Abstract
The invention relates to a battery management system with full-time monitoring and a vehicle management system, which comprises a battery management system and a change-over switch, wherein one end of the change-over switch is connected with the battery management system, and the other end of the change-over switch is used for switching and connecting a low-voltage power supply and a high-voltage to low-voltage module of a whole vehicle. And when the vehicle is stopped, the change-over switch is connected with the battery management system and the high-voltage-to-low-voltage module. In the normal running process of the vehicle, the whole vehicle low-voltage power supply supplies power to the battery management system, and when the vehicle is parked, the vehicle low-voltage power supply is converted into a high-voltage to low-voltage module to supply power to the battery management system. The invention realizes uninterrupted power supply within 24 hours of the battery management system, so that the information of the power battery can be monitored at any time, the battery data can be processed in time when serious faults occur, and potential safety hazards are eliminated, so that serious economic losses are avoided.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a battery management system with full-time monitoring and a vehicle management system.
Background
With the increasing demand of vehicles in new energy markets, the safety performance requirements of more and more customers, workshops, whole vehicle factories and the like on electric vehicles are also continuously improved, and safety is an important concern of people. As an important part of a new energy vehicle, the safety of the power battery is particularly important.
In general, the whole vehicle low-voltage power supply supplies power to the battery management system. However, power supply is required in the running state of the vehicle. When the vehicle is in a stop state, if the vehicle encounters conditions such as rain, snow and weather, the potential safety hazard problem exists, namely, the power battery system of the vehicle can be damaged, and the power battery can be in a short circuit or failure state. In the prior art, only the power battery data under the condition that the vehicle normally runs are monitored, but the power battery data of the vehicle in a stop state are not monitored.
Disclosure of Invention
The invention aims to provide a battery management system with full-time monitoring and a vehicle management system, which are used for solving the problem that data of a power battery cannot be monitored when a vehicle stops.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention relates to a battery management system with full-time monitoring, which comprises a battery management system and a change-over switch, wherein one end of the change-over switch is connected with the battery management system, and the other end of the change-over switch is used for switching and connecting a whole vehicle low-voltage power supply and a high-voltage to low-voltage module; and when the vehicle is stopped, the change-over switch is connected with the battery management system and the high-voltage-to-low-voltage module.
Further, the change-over switch is a relay.
The invention relates to a vehicle management system, which comprises a battery management system with full-time monitoring, a power battery and a whole vehicle low-voltage power supply, wherein the battery management system with the full-time monitoring comprises the battery management system, a vehicle monitoring terminal and the power battery are in communication connection, the battery management system with the real-time monitoring further comprises a change-over switch, one end of the change-over switch is connected with the battery management system, and the other end of the change-over switch is used for being in switching connection with the whole vehicle low-voltage power supply and a high-voltage to low-voltage module; when the vehicle is stopped, the change-over switch is connected with the battery management system and the high-voltage-to-low-voltage module; one end of the change-over switch is also connected with the vehicle-mounted monitoring terminal through a first power supply switch (K4), and is also connected with the power battery through a second power supply switch (K2), and the battery management system is controlled to be connected with the first power supply switch (K4) and the second power supply switch (K2).
Further, the change-over switch is a relay.
Further, the vehicle management system further comprises a monitoring background in communication connection with the vehicle monitoring terminal, and the monitoring background is used for being in communication connection with the mobile phone terminal.
Further, the vehicle monitoring terminal is connected with the monitoring background through a GPS.
Further, the monitoring background is connected with the mobile phone terminal through a mobile network.
Further, the power battery is communicated with the battery management system and the battery management system is communicated with the vehicle-mounted monitoring terminal through CAN.
Further, the vehicle management system further comprises a whole vehicle controller, one end of the change-over switch is further connected with the whole vehicle controller through a third power supply switch (K3), and the battery management system is controlled to be connected with the third power supply switch (K3).
The beneficial effects of the invention are as follows:
the invention improves the existing battery management power supply system, so that the high-voltage to low-voltage module and the whole vehicle low-voltage power supply realize competitive power supply through the change-over switch. In the normal running process of the vehicle, the whole vehicle low-voltage power supply supplies power to the battery management system, and when the vehicle is parked, the vehicle low-voltage power supply is converted into a high-voltage to low-voltage module to supply power to the battery management system. Therefore, uninterrupted power supply within 24 hours of the battery management system is realized, so that the information of the power battery can be monitored at any time, the battery data can be processed in time when serious faults occur, potential safety hazards are eliminated, and serious economic losses are avoided.
Drawings
FIG. 1 is a prior art vehicle management system diagram;
fig. 2 is a diagram of a vehicle management system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in more detail with reference to the accompanying drawings and examples, but the embodiments of the present invention are not limited thereto.
The following description will be made by taking a pure electric vehicle as an example.
In the prior art, as shown in fig. 1, a power battery, a whole vehicle controller, a vehicle-mounted monitoring terminal and a battery management system are connected to a CAN network, and the battery management system is powered by a whole vehicle low-voltage power supply, and the power battery, the whole vehicle controller and the vehicle-mounted monitoring terminal are powered by a whole vehicle low-voltage power supply. The battery management system CAN control the power battery according to the whole vehicle state, and the power battery transmits own state information to a main board of the battery management system through the CAN.
In the running process of the vehicle, the power battery of the pure electric vehicle transmits the information of the battery temperature, the voltage, the current and the like of the power battery to a main board of a battery management system through a slave board, and then the main board is transmitted to a vehicle-mounted monitoring terminal and then to a monitoring background, wherein the monitoring background can monitor the state information of the power battery in real time; the driving fault information is transmitted to the whole vehicle controller by the battery management system, and the whole vehicle controller controls the whole vehicle safety through an internal whole vehicle control strategy.
However, if severe environments such as rain and snow are encountered when the vehicle is stopped, the battery is very likely to be in water-soaking insulation failure, or the battery system is likely to be in risk such as water-soaking, short circuit, high temperature, overvoltage and the like, at this time, the failure information cannot be timely transmitted to the monitoring background due to the fact that the whole vehicle is not powered by the power supply system.
As shown in fig. 2, the present invention is an improvement of the power supply control system of the battery management system based on the prior art. When the whole vehicle stops running, the high-voltage-to-low-voltage module supplies power to the battery management system, so that the high-voltage-to-low-voltage module and the whole vehicle low-voltage power supply compete for power supply.
In order to realize competitive power supply, a change-over switch is added, and in the embodiment, the change-over switch selects a five-pin relay. Coil Q1 of five-pin relay K1 is powered by Vcc. One end of a contact switch of the five-pin relay K1 is connected with the battery management system, and the other end of the contact switch is used for switching and connecting a low-voltage power supply and a high-voltage to low-voltage module of the whole vehicle. And in addition, one end of the K1 is also connected with the vehicle-mounted monitoring terminal through a first power supply switch K4, is also connected with the power battery through a second power supply switch K2, and is also connected with the whole vehicle controller through a third power supply switch K3. The battery management system controls connections K2, K3 and K4.
When the vehicle stops, the K5 is turned off, the coil Q1 is powered off, the contact K1 is turned into a state as shown in fig. 2, namely, the power supply of the battery management system is switched from the whole vehicle low-voltage power supply to the high-voltage to low-voltage DC-DC module, so that the singlechip of the battery management system can be powered by the DC-DC module in the vehicle stop state, and the power module of the battery management system is in a dormant mode. When the data of the power battery stored on the slave board of the power battery is required to be collected, the battery management system starts to work, and the self driving module is utilized to start to work, namely, the singlechip of the battery management system drives the power module to work; meanwhile, the battery management system controls the conduction of K2, K3 and K4, low-voltage power of the DC-DC module is supplied to each slave board of the power battery, the whole vehicle controller and the vehicle-mounted monitoring terminal, so that the power battery can transmit data of each slave board to the battery management system in real time, the battery management system transmits the information to the vehicle-mounted monitoring terminal, and the vehicle-mounted monitoring terminal transmits the data to the monitoring background in real time through a GPS.
When the monitoring background judges that serious faults occur in battery data, fault information is pushed to a mobile phone terminal of a client or a related person through a mobile network, so that a terminal client knows the fault information of the vehicle in real time, and the fault information of the vehicle is processed in time, so that potential safety hazards are eliminated, and serious economic losses are avoided.
Therefore, no matter the vehicle is in a driving state or in a parking state, the power supply is used for supplying power to the battery management system, so that the uninterrupted monitoring function of the whole vehicle power supply system for 24 hours is realized, and the electric vehicle is kept in a safe environment at any time.
In addition, the present invention can also be applied to other automobiles, such as hybrid electric automobiles, buses, and the like.
In this embodiment, a relay is used to realize the competing power supply of the whole vehicle low voltage power supply and the high voltage to low voltage module, and when the vehicle stops, the relay is switched to the high voltage to low voltage module to supply power to the battery management system. As another embodiment, a general change-over switch may be used, that is, when the vehicle is parked, the battery management system is supplied with power by manually pulling the hand brake of the change-over switch and turning the high-voltage to the low-voltage module.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (5)
1. The battery management system with the full-time monitoring comprises a battery management system for continuously monitoring the whole vehicle power supply system all day, and is characterized by further comprising a change-over switch, wherein the change-over switch is a five-pin relay, a coil of the five-pin relay is connected with a fourth power supply switch in series and then is powered by a power supply, one end of a contact switch of the five-pin relay is connected with the battery management system, the other end of the contact switch of the five-pin relay is used for switching and connecting a whole vehicle low-voltage power supply and a high-voltage to low-voltage module, one end of the five-pin relay is also used for connecting a vehicle-mounted monitoring terminal through a first power supply switch, is also used for connecting a power battery through a second power supply switch, and is also used for connecting a whole vehicle controller through a third power supply switch; the battery management system is in control connection with the first power supply switch, the second power supply switch, the third power supply switch and the fourth power supply switch;
during normal operation, the change-over switch is connected with the battery management system and the whole vehicle low-voltage power supply;
when the vehicle is stopped, the battery management system controls the fourth power supply switch to be turned off so as to cut off the power supply of the coil, the change-over switch is connected with the battery management system and the high-voltage to low-voltage module, the battery management system also controls the first, second and third power supply switches to be turned on so as to send low-voltage power supply of the high-voltage to low-voltage module to each slave control board, the whole vehicle controller and the vehicle-mounted monitoring terminal of the power battery, the power battery can transmit data of each slave control board to the battery management system in real time, the battery management system transmits the information to the vehicle-mounted monitoring terminal, and the vehicle-mounted monitoring terminal further transmits the data to the monitoring background through a GPS in real time.
2. The vehicle management system comprises a battery management system with full-time monitoring, a power battery and a whole vehicle low-voltage power supply, wherein the battery management system, a vehicle monitoring terminal and the power battery are in communication connection.
3. The vehicle management system of claim 2, further comprising a monitoring background communicatively coupled to the vehicle monitoring terminal, the monitoring background being configured to communicatively couple to the cell phone terminal.
4. A vehicle management system according to claim 3, wherein the monitoring background is connected to the mobile phone terminal via a mobile network.
5. The vehicle management system according to claim 2, wherein the power battery and the battery management system, and the battery management system and the in-vehicle monitoring terminal communicate via CAN.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710284517.1A CN108725233B (en) | 2017-04-25 | 2017-04-25 | Battery management system with full time monitoring and vehicle management system |
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| CN201710284517.1A CN108725233B (en) | 2017-04-25 | 2017-04-25 | Battery management system with full time monitoring and vehicle management system |
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| CN108725233A CN108725233A (en) | 2018-11-02 |
| CN108725233B true CN108725233B (en) | 2023-07-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109606118B (en) * | 2019-01-11 | 2020-11-24 | 厦门金龙联合汽车工业有限公司 | Low-voltage power distribution method of safety monitoring system of power battery of electric automobile |
| CN113147503B (en) * | 2021-04-19 | 2024-03-08 | 北京汽车股份有限公司 | Power management method for electric vehicle |
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