CN112428874A

CN112428874A - New energy automobile cascades battery management system

Info

Publication number: CN112428874A
Application number: CN202011221981.4A
Authority: CN
Inventors: 李国辉; 毛俊鑫; 路程祥; 鲁群; 李万强
Original assignee: Tianjin Hengtian New Energy Automobile Research Institute Co ltd
Current assignee: Tianjin Hengtian New Energy Automobile Research Institute Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-03-02

Abstract

The invention discloses a new energy vehicle cascade battery management system, comprising a main board controller, a first slave board controller, a second slave board controller, a third slave board controller and a fourth slave board controller. One end of the controller is fixed with the main output port unit, and one end of the first slave board controller, the second slave board controller, the third slave board controller and the fourth slave board controller are symmetrically fixed with slave output port units respectively. and the slave receiving end unit, the main output port unit and one end of the slave receiving end unit are movably connected through the first two-wire serial communication wire, the first slave board controller, the second slave board controller, the third slave board controller It is movably connected with the fourth slave board controller through the second two-wire serial port communication wire, and the invention relates to the technical field of new energy vehicles. The new energy vehicle cascaded battery management system solves the problems of high cost, complex structure and slow signal transmission speed of the traditional topology structure.

Description

New energy automobile cascades battery management system

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a cascade battery management system of a new energy automobile.

Background

The new energy automobile adopts unconventional automobile fuel as a power source (or uses conventional automobile fuel and adopts a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, forms an automobile with advanced technical principle, new technology and new structure, and comprises four types of Hybrid Electric Vehicles (HEV), pure electric vehicles (BEV, including solar energy automobiles), Fuel Cell Electric Vehicles (FCEV), other new energy automobiles (such as efficient energy accumulators such as super capacitors and flywheels) and the like. Unconventional automotive fuels refer to fuels other than gasoline, diesel, Natural Gas (NG), Liquefied Petroleum Gas (LPG), Ethanol Gasoline (EG), methanol, dimethyl ether. In traditional new energy automobile battery management system, battery management system's topological structure mainly is a main many slave structures, and every slave plate contains 2 ~ 6 simulation front end acquisition chips again, and simulation front end acquisition chip communicates through keeping apart SPI bus and slave plate MCU in a slave plate, and every slave plate is hung and is carried out information interaction through CAN communication and mainboard MCU on the intranet CAN line.

Through retrieval patent CN201810326516.3, specifically be a new energy automobile's battery management system, mainly include data acquisition module, host system, display module and CAN bus, data acquisition module passes through the CAN bus with host system communication connection, display module with host system links to each other, data acquisition module is used for gathering the real-time status information of battery, control module is used for realizing the control and the management to the battery, display module is used for showing battery information and low-battery warning information.

Also retrieve patent CN201310512089.5, specifically is a battery management system of new energy automobile, mainly includes: the electric energy input end is used for receiving electric energy from a battery of the new energy automobile; the battery management circuit is electrically connected with the electric energy input end and is used for receiving the electric energy from the electric energy input end and distributing the electric energy; the electric energy output end is electrically connected with the battery management circuit and used for receiving electric energy from the battery management circuit and outputting the electric energy to a power system of the new energy automobile; and the manual maintenance switch is connected with the battery management circuit and used for stopping the electric energy output of the electric energy output end. According to the technical scheme, the battery management system of the new energy automobile comprises an electric energy input end, a battery management circuit connected with the electric energy input end, an electric energy output end connected with the battery management circuit and a manual maintenance switch, wherein the manual maintenance switch is used for stopping the electric energy output of the electric energy output end to a power system of the new energy automobile, and therefore the battery management system can stop supplying power to the power system.

Although the above patent implements the effect that the data acquisition module is used for acquiring real-time state information of the battery, the control module is used for controlling and managing the battery, the display module is used for displaying battery information and low-power reminding information, and is used for receiving electric energy from the electric energy input end and distributing the electric energy, receiving electric energy from the battery management circuit and outputting the electric energy to the power system of the new energy automobile, stopping the electric energy output of the electric energy output end, and stopping the electric energy output of the electric energy output end to the power system of the new energy automobile, so that the battery management system can stop supplying power to the power system, the following problems exist;

each slave board in the traditional topology requires a separate power supply module, MCU and two-stage communication isolation modules (SPI data isolation and CAN isolation) which account for more than 60% of the overall hardware cost. Meanwhile, signals are sent out after being processed by the slave MCU, and primary signal transfer is additionally added. The whole design scheme has the defects of high cost, complex structure, low signal transmission speed and the like.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a new energy automobile cascade battery management system, which solves the problems of high cost, complex structure, low signal transmission speed and the like of the traditional topological structure.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a new energy automobile cascades battery management system, includes mainboard controller, first slave board controller, second slave board controller, third slave board controller and fourth slave board controller, the fixed main delivery outlet unit that is provided with in one end of mainboard controller, the fixed slave delivery outlet unit that is provided with respectively of one end of first slave board controller, second slave board controller, third slave board controller and fourth slave board controller and from delivery outlet unit and from receiving end unit, through first two serial ports communication wire swing joint between main delivery outlet unit and the one end from receiving end unit, through second two serial ports communication wire swing joint between first slave board controller, second slave board controller, third slave board controller and the fourth slave board controller.

Preferably, the motherboard controller comprises a main control unit, a transceiver, a data sending unit and a data receiving unit, and the main control unit and the transceiver are electrically connected in a bidirectional manner through the data sending unit and the data receiving unit.

Preferably, the first slave board controller includes a four-channel isolation transformer and an analog acquisition IC system, and the four-channel isolation transformer and the analog acquisition IC system are electrically connected in a unidirectional manner.

Preferably, the first slave board controller, the second slave board controller, the third slave board controller and the fourth slave board controller are electrically connected in a staggered manner with each other through a second two-wire serial port communication lead.

Preferably, a motherboard substrate is arranged at the bottom of the motherboard controller.

Preferably, a fourth slave plate substrate is arranged at the bottom of the first slave plate controller, and a third slave plate substrate is arranged at the bottom of the second slave plate controller.

Preferably, the bottom of the third slave plate controller is provided with a second slave plate substrate, and the bottom of the fourth slave plate controller is provided with a first slave plate substrate.

Preferably, the first two-wire serial port communication lead and the second two-wire serial port communication lead are both members with the same size, and the first slave board controller, the second slave board controller, the third slave board controller and the fourth slave board controller are all members with the same size.

Advantageous effects

The invention provides a cascade battery management system of a new energy automobile. Compared with the prior art, the method has the following beneficial effects:

1. according to the cascade battery management system of the new energy automobile, an MCU and a power supply module in a slave board are omitted in a mode that a right four-channel isolation transformer and a simulation acquisition IC system in a first slave board controller are formed, two-stage communication isolation is simplified into one-stage transformer communication isolation, and the overall hardware cost of the battery management system can be greatly reduced.

2. According to the cascade battery management system of the new energy automobile, through a daisy chain mode formed among the first slave plate controllers, the second two-wire serial port communication conducting wire is adopted for transmission, the electrical isolation effect is better, and the anti-interference performance is stronger.

3. This new energy automobile cascades battery management system, through the main delivery outlet unit of mainboard controller one end and the follow delivery outlet unit and follow receiving terminal unit cascade mode support the modularized design of first slave controller one end, reduce the system to CAN interface demand.

4. According to the cascade battery management system of the new energy automobile, the transmission distance is longer in a daisy chain mode through the second two-wire serial port communication lead, and the longest transmission distance can reach 100 meters.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the structure of the present invention;

FIG. 3 is a system diagram of the architecture of the present invention;

FIG. 4 is a system diagram of a motherboard controller structure according to the present invention;

FIG. 5 is a system diagram of the slave controller architecture of the present invention;

fig. 6 is a block diagram of a topology architecture of a conventional battery management system according to the present invention.

In the figure: 1. a motherboard substrate; 2. a motherboard controller; 21. a main control unit; 22. a transceiver; 23. transmitting the data unit; 24. receiving a data unit; 3. a first two-wire serial port communication wire; 4. a first slave controller; 41. a four-channel isolation transformer; 42. simulating an acquisition IC system; 5. a second slave controller; 6. a third slave controller; 7. a fourth slave controller; 8. a second two-wire serial port communication wire; 9. a first slave plate substrate; 10. a second slave plate substrate; 11. a third slave substrate; 12. a fourth slave substrate; 13. a slave outlet unit; 14. a slave receiving end unit; 15. a main outlet unit.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1-3, which illustrate a technical solution provided by the embodiments of the present invention: a cascade battery management system of a new energy automobile comprises a main board controller 2, a first slave board controller 4, a second slave board controller 5, a third slave board controller 6 and a fourth slave board controller 7, wherein a main output port unit 15 is fixedly arranged at one end of the main board controller 2, a slave output port unit 13 and a slave receiving port unit 14 are respectively and symmetrically and fixedly arranged at one end of the first slave board controller 4, the second slave board controller 5, the third slave board controller 6 and the fourth slave board controller 7, the main output port unit 15 is movably connected with one end of the slave receiving port unit 14 through a first two-wire serial port communication lead 3, the first slave board controller 4, the second slave board controller 5, the third slave board controller 6 and the fourth slave board controller 7 are movably connected through a second two-wire serial port communication lead 8, and the first slave board controller 4, the second slave board controller 5, The third slave board controller 6 and the fourth slave board controller 7 are electrically connected in a staggered mode through a second two-wire serial port communication wire 8 from an output port unit 13 and a slave receiving end unit 14, the bottom of the master board controller 2 is provided with a master board substrate 1, the bottom of the first slave board controller 4 is provided with a fourth slave board substrate 12, the bottom of the second slave board controller 5 is provided with a third slave board substrate 11, the bottom of the third slave board controller 6 is provided with a second slave board substrate 10, the bottom of the fourth slave board controller 7 is provided with a first slave board substrate 9, the first two-wire serial port communication wire 3 and the second two-wire serial port communication wire 8 are members with the same size, and the first slave board controller 4, the second slave board controller 5, the third slave board controller 6 and the fourth slave board controller 7 are members with the same size.

Referring to fig. 4, the motherboard controller 2 includes a main control unit 21, a transceiver 22, a data transmitting unit 23 and a data receiving unit 24, and the main control unit 21 and the transceiver 22 are electrically connected in two directions via the data transmitting unit 23 and the data receiving unit 24

Referring to fig. 5, the first slave controller 4 includes a four-channel isolation transformer 41 and an analog acquisition IC system 42, and the four-channel isolation transformer 41 and the analog acquisition IC system 42 are electrically connected in a unidirectional manner.

In use, after the system is initialized, the master control unit 21 on the top of the motherboard substrate 1 sends out information through the sending data unit 23, the information is transmitted to the master output port unit 15 through the transceiver 22, the information is poured into the slave receiving end unit 14 through the first two-wire serial communication lead 3, the information is input into the four-channel isolation transformer 41 from the receiving end unit 14, the information is output into the analog acquisition IC system 42 through the four-channel isolation transformer 41, the information is transmitted through the electrical connection in which the slave output port unit 13 and the slave receiving end unit 14 are staggered through the second two-wire serial communication lead 8 according to the first slave controller 4, the second slave controller 5, the third slave controller 6 and the fourth slave controller 7, and the information is rotated through the receiving data unit 24, each slave controller 4 performs the analog acquisition IC system 42 of which performs the address matching with the address calibrated in the data information Messages and responses thereto. Each of the first slave controller 4, the second slave controller 5, the third slave controller 6 and the fourth slave controller 7 has a simple structure, low cost and high signal transmission speed.

In this embodiment, it should be noted that, by adopting a daisy chain cascade topology architecture, the analog acquisition IC system 42 performs communication in a cascade manner, the communication system is a half-duplex daisy chain master/slave network, and the maximum number of connected nodes can be up to 64, which is enough to meet the use requirement of the new energy automobile.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a new energy automobile cascades battery management system, includes mainboard controller (2), first slave board controller (4), second slave board controller (5), third slave board controller (6) and fourth slave board controller (7), its characterized in that: the fixed main delivery outlet unit (15) that is provided with of one end of mainboard controller (2), the one end of first slave board controller (4), second slave board controller (5), third slave board controller (6) and fourth slave board controller (7) is equallyd divide and is do not the symmetry fixed from delivery outlet unit (13) and follow receiving terminal unit (14) be provided with, main delivery outlet unit (15) and follow between the one end of receiving terminal unit (14) through first two line serial ports communication wire (3) swing joint, through second two line serial ports communication wire (8) swing joint between first slave board controller (4), second slave board controller (5), third slave board controller (6) and fourth slave board controller (7).

2. The cascade battery management system of the new energy automobile according to claim 1, characterized in that: the mainboard controller (2) comprises a main control unit (21), a radio transceiver (22), a data sending unit (23) and a data receiving unit (24), and the main control unit (21) and the radio transceiver (22) are electrically connected in a bidirectional mode through the data sending unit (23) and the data receiving unit (24).

3. The cascade battery management system of the new energy automobile according to claim 1, characterized in that: the first slave controller (4) comprises a four-channel isolation transformer (41) and an analog acquisition IC system (42), and the four-channel isolation transformer (41) is electrically connected with the analog acquisition IC system (42) in a one-way mode.

4. The cascade battery management system of the new energy automobile according to claim 3, characterized in that: and the first slave controller (4), the second slave controller (5), the third slave controller (6) and the fourth slave controller (7) are electrically connected in a staggered manner with each other through a second two-wire serial port communication lead (8) between the slave output port unit (13) and the slave receiving port unit (14).

5. The cascade battery management system of the new energy automobile according to claim 2, characterized in that: the bottom of the mainboard controller (2) is provided with a mainboard substrate (1).

6. The cascade battery management system of the new energy automobile according to claim 4, characterized in that: a fourth slave plate base plate (12) is arranged at the bottom of the first slave plate controller (4), and a third slave plate base plate (11) is arranged at the bottom of the second slave plate controller (5).

7. The cascade battery management system of the new energy automobile according to claim 4, characterized in that: a second slave plate base plate (10) is arranged at the bottom of the third slave plate controller (6), and a first slave plate base plate (9) is arranged at the bottom of the fourth slave plate controller (7).

8. The cascade battery management system of the new energy automobile according to claim 7, characterized in that: the first two-wire serial port communication lead (3) and the second two-wire serial port communication lead (8) are both members with the same size, and the first slave plate controller (4), the second slave plate controller (5), the third slave plate controller (6) and the fourth slave plate controller (7) are all members with the same size.