CN111767029B - Battery management system and implementation method thereof - Google Patents

Battery management system and implementation method thereof Download PDF

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Publication number
CN111767029B
CN111767029B CN202010616298.4A CN202010616298A CN111767029B CN 111767029 B CN111767029 B CN 111767029B CN 202010616298 A CN202010616298 A CN 202010616298A CN 111767029 B CN111767029 B CN 111767029B
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state
layer
function
mode
battery
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CN111767029A (en
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陕亮亮
戴润义
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Chengdu Yajun New Energy Automobile Technology Co Ltd
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Chengdu Yajun New Energy Automobile Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/20—Software design
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to the field of vehicle power battery software, in particular to a battery management system high-voltage control system and an implementation method thereof. The battery management system is applied to high-voltage control of a battery and comprises an M-mode layer module, an F-function layer module and a C configuration layer module; the M-mode layer module comprises at least one battery state, and the F-function layer comprises at least one function and at least one state identifier; the C configuration layer module represents the adaptation condition of the current hardware and functions; and changing the current battery state according to the state identification signal, wherein the F functional layer module acquires at least one electrical parameter. The invention provides a high-voltage control MFC software architecture mode of a battery management system, which is used for carrying out architecture design aiming at a high-voltage control function of the battery management system, and is used for developing and adapting different levels from the initial architecture, so that the invention is oriented to the electrical principle of various battery systems and solves the problem of overhigh coupling degree.

Description

Battery management system and implementation method thereof
Technical Field
The invention relates to the field of vehicle power battery software, in particular to a battery management system high-voltage control system and an implementation method thereof.
Background
At present, the high-voltage control software of the power battery management system needs to be subjected to function description and development again in the principle of different battery systems, and the later test and maintenance period is long.
The current relatively good method only adopts the division of different functions, or needs to be configured and selected for software development, the coupling degree of the system is too high, the modification function or the hardware adaptation needs to be modified from end to end, so that the system is easy to make mistakes, and the maintenance cost is too high.
Disclosure of Invention
The invention aims at: aiming at the problems existing in the prior art, the invention provides a battery management system, in particular to a high-voltage control MFC software architecture system.
The invention provides a battery management system which is applied to high-voltage control of a battery, and comprises an M-mode layer module, an F-function layer module and a C-configuration layer module, wherein the M-mode layer module comprises at least one battery state, the F-function layer module comprises at least one function and at least one state identifier, the C-configuration layer module represents the adaptation condition of current hardware and functions, the M-mode layer module receives a function state identifier signal of the F-function layer module, the current battery state is changed according to the function state identifier signal, the F-function layer module acquires at least one electrical parameter, at least one function of the F-function layer module generates a function state identifier according to the electrical parameter and reports the function state identifier to the M-mode layer module, the M-mode layer module receives the modification of the current battery state, generates a mode state control signal according to the modified battery state and transmits the mode state control signal to the F-function layer module, and the F-function layer module receives the mode control signal generated by the M-mode layer module and generates a mode control signal according to the condition that the F-function layer module is disconnected from the hardware or the C-mode control module.
Another aspect of the present invention provides a method for implementing a battery management system, where the battery management system is applied to high voltage control of a battery, and the method is characterized in that: the battery management system is realized by using an M-mode layer, an F-function layer and a C-configuration layer, wherein the M-mode layer comprises at least one battery state, the F-function layer comprises at least one function and at least one state identifier, the C-configuration layer represents the adaptation condition of current hardware and functions, the M-mode layer receives a function state identifier signal of the F-function layer, the current battery state is changed according to the function state identifier signal, the F-function layer collects at least one electrical parameter, at least one function of the F-function layer generates a state identifier according to the electrical parameter and reports the state identifier to the M-mode layer, the M-mode layer receives the modification of the current battery state, generates a mode state control signal according to the modified battery state and transmits the mode state control signal to the F-function layer, and the F-function layer receives the mode state control signal generated by the M-mode layer, so that the at least one function of the F-function layer generates an opening or closing signal according to the adaptation condition of the mode state control signal and the C-configuration layer to control the opening and closing of the hardware.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are some embodiments of the invention and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 MFC is a schematic diagram;
FIG. 2M is a schematic diagram of a mode architecture;
FIG. 3F is a functional architecture diagram;
FIG. 4C is a configuration diagram;
FIG. 5 high pressure schematic A;
FIG. 6 high pressure schematic B;
FIG. 7 high pressure schematic C;
Fig. 8 adds a charging function at layer F;
Fig. 9 high pressure schematic D.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
The high-voltage control system of the battery management system adopts an MFC software architecture mode.
As shown in FIG. 1, the specific MFC software architecture includes an M-mode layer module, an F-function layer module, and a C-configuration layer module.
As shown in fig. 2, the M-mode layer only describes and divides for the high-voltage control object, and is independent of the system electrical principle and independent of the hardware interface.
As shown in fig. 3, the F functional layer only performs specific logic function development for different modes, relies on different system electrical principles, does not rely on hardware interfaces, but can implement multi-functional module development to select through calibration.
As shown in fig. 4, the C configuration layer, which is only required to be configured for different items, depends on the system electrical principle and hardware interfaces.
The software interfaces between the 3 layers only need to pass through an upper interface and a lower interface, wherein the M mode and the F function only need to interact through a mode state and a function state; the F functional layer and the C configuration layer only need to interact through the functional state and the control state.
Various modes of the MFC will be described in detail in the following embodiments.
The M-mode layer includes at least one battery state, and the F-function layer includes at least one function and at least one state identifier.
As shown in fig. 1, when in the uplink interface, the M-mode layer receives the function status identification signal of the F-function layer, and changes the current battery status according to the function status identification signal.
In particular, one possible implementation of the M mode is that the current battery state may be displayed to the user via a display device, such as in a charging car, the battery state may be displayed in a console display, through which the user knows the current charging phase of the battery.
Illustratively, the M-mode layer divides 8 big states: a default state 1, a sleep state 2, a low voltage power-on state 3, a self-test state 4, a high voltage power-on state 5, a high voltage power-off state 6, a high voltage stop state 7, and a low voltage power-off state 8.
In an alternative embodiment, the 8-big states of the M layer are classified by different functional states as follows:
1 default state: the first mode the software enters does not make any judgment.
2 Sleep state: the system enters a low-voltage dormant state, judges that the S1 state is identified as 1 or the S14 state is identified as 1.
3 Low voltage power-on state: and judging that the S2 state mark is 1 or the S13 mark is 1.
4 Self-checking state: and judging that the S3 state mark is 1 to enter.
5 High voltage power-on state: and judging that the S5 state mark is 1 or the S8 state mark is 1.
6 High voltage down state: and judging that the S4 state mark is 1 or the S7 state mark is 1.
7 High pressure stop state: and judging that the S6 state mark is 1 or the S9 state mark is 1 or the S12 state mark is 1.
8 Low voltage state: and judging that the S10 state mark is 1 or the S11 state mark is 1 or the S15 state mark is 1.
S1-S15 are the function state identification signals of the F function layer.
The F functional layer may have multiple functions as shown in fig. 3, and as shown in fig. 1, the F functional layer module collects at least one electrical parameter to obtain a control state, and the function of the F functional layer module may generate a functional state identifier according to the electrical parameter and report the functional state identifier to the M mode layer module.
Illustratively, the F layer may include the following functions:
Function 1, power-on judgment: and judging the power-on command by judging the power-on command of the CAN message or an external hardware signal.
Function 2, self-checking judgment: judging whether the high-voltage insulation of the battery system is normal, and judging whether the data is normal.
Function 3, precharge judgment: and judging whether the interpolation of the precharge voltage and the battery voltage is not more than 10V and the time is not more than 1s, if so, considering that the precharge is successful, otherwise, the precharge fails.
Function 4, high-voltage power-on judgment: the high voltage on state persists for 200 ms.
Referring again to fig. 1, after the control state parameters are obtained, the different functions in the f layer may generate a function state identifier according to the control state parameters, and in an alternative embodiment, the function state identifier may be generated according to the control state parameters by the following method:
the S1 state is identified as 1: software default to 1
S2 state identification is 1: the initial value is 0, the external hardware electrical wake-up value of the battery management system is 1,
S3 state identification is 1: initial value is 0, and the initialization completion value of the battery management system software is 1
S4 state identification is 1: the initial value is 0, and the value of the received external power-down command is 1
S5 state identification is 1: the initial value is 0, and the value of the received external power-on command is 1
S6 state identification is 1: the initial value is 0, and the self-checking failure assignment of the self-checking state is 1
S7 state identification is 1: the initial value is 0, and the value of the received external power-down command is 1
S8 state identification is 1: the initial value is 0, and the value of the received external power-on command is 1
S9 state identification is 1: initial value of 0, system finds failure and assigns 1
S10 state identification is 1: the initial value is 0, and the value of the external hardware electric wake-up disconnection of the battery management system is 1
The S11 state is identified as 1: the initial value is 0, and the value of the external hardware electric wake-up disconnection of the battery management system is 1
The S12 state is identified as 1: initial value of 0, system finds failure and assigns 1
S13 state identification is 1: the initial value is 0, and the electrical wake-up value of external hardware of the battery management system is 1
S14 status flag is 1: initial value is 0, and low-voltage power down state completion assignment is 1
S15 status flag is 1: the initial value is 0, and the value of the external hardware electric wake-up disconnection of the battery management system is 1.
When the electric state of the bottom layer is changed, the implementation of the M layer is not required to be changed, and only the corresponding function in the F layer is required to be modified. The F layer only concerns the electrical parameters, but does not need to concern specific hardware, and only needs to read the corresponding functional configuration from the C configuration layer, so that different functions can be realized by using different electrical parameters, and the hardware change of the bottom layer is shielded.
As shown in fig. 1, in the downlink interface, the M-mode layer module receives a modification to the current battery state, and generates a mode state control signal according to the modified battery state. Illustratively, the user modifies the current state in the user interface to the state of charge, e.g., from a default state to a self-checking state.
After the state of the M layer is modified, the M layer transmits a mode state control signal to an F function layer module, and the F function layer module receives the state control signal generated by the M mode layer module.
As shown in fig. 3, the F functional layer may include a plurality of functions, and the functions parse the status control signal after receiving the status control signal, and read the configuration from the C configuration module.
As shown in fig. 4, the C configuration module may include a plurality of different configurations, where different functions are configured to correspond to different conditions for opening and closing the switches in the battery module, and different functions of the F functional layer generate control signals according to the state control signals received from the M layer and the configuration conditions in the C configuration layer, so that the switches are opened and closed.
In a specific embodiment, as shown in fig. 5, the configuration of layer C for this high voltage schematic is as follows:
Main positive relay configuration: and configuring a hardware interface, controlling the opening and closing of the relay through the functional state of the F functional layer, closing the relay in a high-voltage power-on state, and opening other states.
Precharge relay configuration: and configuring a hardware interface, controlling the opening and closing through the functional state of the F functional layer, closing the relay in the precharge state, and opening other states.
As shown in fig. 6, for the high-voltage schematic diagram, a main negative relay is added, the M layer is unchanged, the F layer is unchanged, and the relay is controlled to be adjusted in the C layer. The configuration of layer C at this time is as follows:
Main positive relay configuration: and configuring a hardware interface, controlling the opening and closing of the relay through the functional state of the F functional layer, closing the relay in a high-voltage power-on state, and opening other states.
And (3) main negative relay configuration: and a hardware interface is configured, the relay is controlled to be opened and closed through the functional state of the F functional layer, and the relay is opened in the precharge and high-voltage power-on states and the other states are opened.
Precharge relay configuration: and configuring a hardware interface, controlling the opening and closing through the functional state of the F functional layer, closing the relay in the precharge state, and opening other states.
It can be seen from this embodiment that after adding the main negative relay, only the configuration of the C configuration layer needs to be modified, while neither the M layer nor the F layer is modified.
In another specific embodiment, as shown in fig. 7, the configuration of layer C for this high voltage schematic is as follows:
Charging positive relay configuration: and configuring a hardware interface, closing the relay through the charging function of the F functional layer, and opening the relay through other functions.
Aiming at the high-voltage schematic diagram, the M layer is unchanged, the F layer is added with a charging function module, as shown in fig. 8, and the C layer controls the relay to adjust, as shown in fig. 9.
The layer C is as follows:
Charging positive relay configuration: configuring a hardware interface, closing the relay through the charging function of the F functional layer, and opening the relay through other functions
Charging negative electricity device configuration: configuring a hardware interface, closing the relay through the charging function of the F functional layer, and opening the relay through other functions
In this embodiment, firstly, the charging function is added in the F layer, secondly, the number of the control relays is different in the C layer, and the functions are different, but only 1 function is added in the F layer, and different relay configurations are completed in the C layer, so that no matter how external electricity is changed, the M layer is unchanged, the F layer is added (can be the most complete) according to the function requirements, and the C layer is adapted according to different hardware.
At least one embodiment of the present invention also provides a battery management implementation method, through the battery management system disclosed by the present invention, the embodiments disclosed in the present invention are implemented by using a computer program.

Claims (8)

1. A battery management system for battery high voltage control, characterized in that:
the battery management system comprises an M mode layer, an F function layer and a C configuration layer;
the M mode layer comprises at least one battery state, and the M mode layer only describes and divides a high-voltage control object, and is independent of a system electrical principle and a hardware interface;
The F functional layer comprises at least one function and at least one state identifier, and is used for developing specific logic functions only aiming at different modes and is independent of hardware interfaces depending on different system electrical principles;
The C configuration layer represents the adaptation condition of the current hardware and functions, and the C configuration layer only needs to be configured for different projects depending on the system electrical principle and hardware interfaces;
The F functional layer comprises a plurality of functions, and after receiving the state control signal, the functions analyze the state control signal and read configuration from the C configuration layer;
the C configuration layer comprises a plurality of different configurations, and different functions are configured to correspond to different conditions of opening and closing of the switch in the battery module;
In an uplink interface, the M-mode layer receives a function state identification signal of the F-mode layer, changes the current battery state according to the function state identification signal, acquires at least one electrical parameter, generates the function state identification according to the electrical parameter by at least one function of the F-mode layer, and reports the function state identification to the M-mode layer;
In a downlink interface, the M-mode layer receives modification of a current battery state, generates a mode state control signal according to the modified battery state, and transmits the mode state control signal to the F-function layer, wherein the F-function layer receives the mode state control signal generated by the M-mode layer, and at least one function of the F-function layer generates an opening or closing signal according to the mode state control signal and the adaptation condition of the C-configuration layer so as to control opening and closing of hardware;
The F functional layer collecting at least one electrical parameter comprises at least one of the following method implementation: judging a power-on command of the CAN message, judging an external hardware signal, judging whether the high-voltage insulation of a battery system is normal, judging whether the interpolation between the pre-charge voltage and the battery voltage does not exceed a first threshold value and the time does not exceed a second threshold value, and judging that the high-voltage power-on state is kept in a third threshold value.
2. The battery management system according to claim 1, wherein:
the M-mode layer includes at least one of the following states: default state, sleep state, low power-on state, self-test state, high power-on state, high power-down state, high power-off state, low power-down state.
3. The battery management system according to claim 1, wherein:
the functions of the F functional layer include at least one of the following functions: wake-up judgment, power-up command judgment, power-down command judgment, self-checking judgment, low-voltage state judgment, high-voltage state judgment and fault judgment.
4. The battery management system according to claim 1, wherein:
the C-configuration layer includes an open and closed relationship of at least one function of the F-function layer and at least one hardware switch.
5. A method for implementing a battery management system, the battery management system being applied to battery high voltage control, characterized in that: the battery management system is realized by using an M mode layer, an F function layer and a C configuration layer;
the M mode layer comprises at least one battery state, and the M mode layer only describes and divides a high-voltage control object, and is independent of a system electrical principle and a hardware interface;
The F functional layer comprises at least one function and at least one state identifier, and is used for developing specific logic functions only aiming at different modes and is independent of hardware interfaces depending on different system electrical principles;
The C configuration layer represents the adaptation condition of the current hardware and functions, and the C configuration layer only needs to be configured for different projects depending on the system electrical principle and hardware interfaces;
The F functional layer comprises a plurality of functions, and after receiving the state control signal, the functions analyze the state control signal and read configuration from the C configuration layer;
the C configuration layer comprises a plurality of different configurations, and different functions are configured to correspond to different conditions of opening and closing of the switch in the battery module;
When the system is in an uplink state, the M-mode layer receives a function state identification signal of the F-mode layer, the current battery state is changed according to the function state identification signal, the F-mode layer acquires at least one electrical parameter, and at least one function of the F-mode layer generates the function state identification according to the electrical parameter and reports the function state identification to the M-mode layer;
When descending, the M mode layer receives modification of the current battery state, generates a mode state control signal according to the modified battery state, and transmits the mode state control signal to the F function layer, the F function layer receives the mode state control signal generated by the M mode layer, and at least one function of the F function layer generates an opening or closing signal according to the mode state control signal and the adaptation condition of the C configuration layer so as to control the opening and closing of hardware;
The F functional layer collecting at least one electrical parameter comprises at least one of the following method implementation: judging a power-on command of the CAN message, judging an external hardware signal, judging whether the high-voltage insulation of a battery system is normal, judging whether the interpolation between the pre-charge voltage and the battery voltage does not exceed a first threshold value and the time does not exceed a second threshold value, and judging that the high-voltage power-on state is kept in a third threshold value.
6. The battery management system implementation method according to claim 5, wherein:
the M-mode layer includes at least one of the following states: default state, sleep state, low power-on state, self-test state, high power-on state, high power-down state, high power-off state, low power-down state.
7. The battery management system implementation method according to claim 5, wherein:
the functions of the F functional layer include at least one of the following functions: wake-up judgment, power-up command judgment, power-down command judgment, self-checking judgment, low-voltage state judgment, high-voltage state judgment and fault judgment.
8. The battery management system implementation method according to claim 5, wherein:
the C-configuration layer includes an open and closed relationship of at least one function of the F-function layer and at least one hardware switch.
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