CN109407012A - A kind of battery management system and battery management method - Google Patents
A kind of battery management system and battery management method Download PDFInfo
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- CN109407012A CN109407012A CN201811479395.2A CN201811479395A CN109407012A CN 109407012 A CN109407012 A CN 109407012A CN 201811479395 A CN201811479395 A CN 201811479395A CN 109407012 A CN109407012 A CN 109407012A
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- 238000007726 management method Methods 0.000 title claims abstract description 92
- 238000012545 processing Methods 0.000 claims abstract description 99
- 230000005540 biological transmission Effects 0.000 claims abstract description 85
- 239000000178 monomer Substances 0.000 claims description 266
- 238000004891 communication Methods 0.000 claims description 48
- 238000006243 chemical reaction Methods 0.000 claims description 43
- 238000002955 isolation Methods 0.000 claims description 42
- 230000005611 electricity Effects 0.000 claims description 29
- 238000005070 sampling Methods 0.000 claims description 29
- 238000012544 monitoring process Methods 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 19
- 238000012546 transfer Methods 0.000 claims description 9
- 238000012512 characterization method Methods 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 230000000875 corresponding effect Effects 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of battery management system and battery management methods.The battery management system includes: higher-pressure region and low-pressure area；Higher-pressure region is provided with data acquisition unit, and low-pressure area is provided with data processing unit；It further include isolated area, isolated area is between higher-pressure region and low-pressure area；Isolated area includes data transmission unit；Data acquisition unit is used to acquire the current data of battery pack；Data transmission unit is used for the present data transmission of the collected battery pack of data acquisition unit to data processing unit；The current data of the data processing unit battery pack of transmission unit transmission for receiving data, and judge according to current data the state of battery pack.Technical solution provided by the invention can simplify battery management system, reduce the occupied space of battery management system, reduce the difficulty of hardware and software development in battery management system, shorten the development cycle, and reduce cost.
Description
Technical field
The present embodiments relate to the management system technical field of Vehicular dynamic battery system more particularly to a kind of cell tubes
Reason system and battery management method.
Background technique
Lithium battery is increasingly extensive in applications such as low-speed vehicle, fork truck, street-cleaning vehicle, storage carrying vehicles as power, this
Battery core quantity in battery pack used in class special vehicle is less for passenger car, commercial vehicle, and voltage usually exists
100V hereinafter, but based on security considerations, still need to monitoring charging and discharging lithium battery process, carry out battery energy management.
Currently, battery management system, in a distributed manner based on (including main module and from module), what it is for single battery packet is
System, needs more installation spaces.Also, common battery management system is that the high-low pressure of main module is both needed to independent centre
Reason unit carry out information processing after interconnection is isolated again, and also needed from module separate central processing unit progress information processing after again every
From interconnection, the application of multiple central processing unit increases hardware and software development difficulty, and the development cycle is long, framework complexity and cost
It is high.
Summary of the invention
The present invention provides a kind of battery management system and battery management method, to simplify battery management system, reduces battery
The occupied space of management system reduces the difficulty of hardware and software development in battery management system, shortens the development cycle, and reduces
Cost.
In a first aspect, the embodiment of the present invention provides a kind of battery management system, the battery management system include: higher-pressure region and
Low-pressure area；
The higher-pressure region is provided with data acquisition unit, and the low-pressure area is provided with data processing unit；
It further include isolated area, the isolated area is between the higher-pressure region and the low-pressure area；The isolated area includes
Data transmission unit；
The data acquisition unit is used to acquire the current data of battery pack；
The data transmission unit is used to pass the current data of the collected battery pack of the data acquisition unit
Transport to the data processing unit；
The data processing unit is used to receive the current data of the battery pack of the data transmission unit transmission, and
The state of the battery pack is judged according to the current data.
Further, the data acquisition unit includes multiple battery core monomer voltage acquisition subelements, the battery core monomer
Voltage acquisition subelement is used to acquire the voltage of the battery core monomer in the battery pack；
It is communicated by the way of daisy chain between each battery core monomer voltage acquisition subelement.
Further, the multiple battery core monomer voltage acquisition subelement includes that the first battery core monomer voltage acquisition is single
Member；
The data acquisition unit further includes battery pack stagnation pressure acquisition subelement, battery core total voltage acquisition subelement, insulation
Monitor subelement；
The output end of the battery pack stagnation pressure acquisition subelement, the output end of battery core total voltage acquisition subelement and institute
The output end for stating insulating monitoring subelement is electrically connected with the first battery core monomer voltage acquisition subelement respectively；
The battery pack stagnation pressure acquisition subelement is used to acquire the total voltage of the battery pack, the battery core total voltage acquisition
For subelement for acquiring battery core total voltage, the insulating monitoring subelement is used to monitor the outer of the battery pack and the battery pack
Insulation resistance between shell, the first battery core monomer voltage acquisition subelement are also used to the battery pack stagnation pressure acquiring son single
The analog signal of first, the described battery core total voltage acquisition subelement and the insulating monitoring subelement is converted to digital signal, and passes
Transport to the data transmission unit.
Further, the data acquisition unit further includes real-time clock subelement；
The receiving end of the real-time clock subelement is electrically connected with the feeder ear of the first battery core monomer voltage acquisition subelement；
The real-time clock subelement is used to acquire the real time clock information of the battery pack, the first battery core monomer electricity
Pressure acquisition subelement is also used to as real-time clock subelement power supply.
Further, the data transmission unit includes the first transmission subelement and the second transmission subelement；
First transmission subelement is used for the first battery core monomer voltage acquisition subelement and the data processing
Data between unit are transmitted；Second transmission subelement is used for at the real-time clock subelement and the data
Data between reason unit are transmitted.
Further, first transmission subelement includes the first Magnetic isolation circuit, and second transmission subelement includes
Second Magnetic isolation circuit；
The first Magnetic isolation circuit is used for the first battery core monomer voltage acquisition subelement and the data processing
Data between unit are transmitted, and the second Magnetic isolation circuit is used for at the real-time clock subelement and the data
Data between reason unit are transmitted.
Further, the multiple battery core monomer voltage acquisition subelement further includes that the second battery core monomer voltage acquisition is single
Member and third battery core monomer voltage acquire subelement；
Between third battery core monomer voltage acquisition subelement and the second battery core monomer voltage acquisition subelement into
Row bidirectional data transfers, the second battery core monomer voltage acquisition subelement and the first battery core monomer voltage acquire subelement
Between carry out bidirectional data transfers, is carried out between the first battery core monomer voltage acquisition subelement and the data processing unit
Bidirectional data transfers.
Further, the data acquisition unit includes the first communication subelement and the second communication subelement；
The first communication subelement is used for third battery core monomer voltage acquisition subelement and second battery core
Data between monomer voltage acquisition subelement are transmitted；
The second communication subelement is used for the second battery core monomer voltage acquisition subelement and first battery core
Data between monomer voltage acquisition subelement are transmitted.
Further, the first communication subelement includes third Magnetic isolation circuit, and the second communication subelement includes
4th Magnetic isolation circuit；
The third Magnetic isolation circuit is used for third battery core monomer voltage acquisition subelement and second battery core
Data between monomer voltage acquisition subelement are transmitted；
The 4th Magnetic isolation circuit is used for the second battery core monomer voltage acquisition subelement and first battery core
Data between monomer voltage acquisition subelement are transmitted.
Further, the data acquisition unit further includes battery core temperature acquisition subelement；
The output end of the battery core temperature acquisition subelement respectively with the second battery core monomer voltage acquire subelement with
And third battery core monomer voltage acquisition subelement electrical connection；
The battery core temperature acquisition subelement is used to acquire the temperature of the battery core in the battery pack；The second battery core list
Bulk voltage acquisition subelement and third battery core monomer voltage acquisition subelement are used to the battery core temperature acquisition subelement
Analog signal is converted to digital signal, and is transmitted to the first battery core monomer voltage acquisition subelement.
Further, the battery core total voltage acquisition subelement includes first choice circuit；The higher-pressure region further include with
The first high voltage interface, the second high voltage interface and the third high voltage interface of the first choice circuit electrical connection；
First high voltage interface is also electrically connected with an input terminal of the first battery core monomer voltage acquisition subelement, institute
It states the second high voltage interface to be also electrically connected with an input terminal of the second battery core monomer voltage acquisition subelement, the third high pressure
Interface is also electrically connected with an input terminal of third battery core monomer voltage acquisition subelement, the output of the first choice circuit
It holds and is electrically connected with an analog-to-digital conversion interface of the first battery core monomer voltage acquisition subelement；
The first choice circuit is used for according to first high voltage interface, second high voltage interface and the third
Voltage output battery core total voltage and characterization voltage on high voltage interface；
The first battery core monomer voltage acquisition subelement is also used to the analog signal of the first choice circuit output
Digital signal is converted to, and is transmitted to the data transmission unit.
Further, the insulating monitoring subelement includes the second selection circuit, and the higher-pressure region further includes voltage conversion
Circuit；
First high voltage interface, second high voltage interface and the third high voltage interface are selected with described second respectively
The input terminal of circuit is electrically connected；The output end of second selection circuit is electrically connected with the data processing unit, and described second
The control terminal of selection circuit with low pressure is electrically connected by first switch；
The high-voltage end of the voltage conversion circuit with high pressure is electrically connected, and the low-pressure end of the voltage conversion circuit passes through the
Two switches are electrically connected with the low pressure, the output end of the voltage conversion circuit and the first battery core monomer voltage acquisition
One analog-to-digital conversion interface of unit is electrically connected；
The control terminal of the first switch is electrically connected with the control port of the data processing unit, the second switch
Control terminal is electrically connected with the control port of the first battery core monomer voltage acquisition subelement；
Second selection circuit is used to acquire the shell and the electricity of the battery pack in first switch closure
The battery core of Chi Bao always just between leakage current, the first battery core monomer voltage acquisition subelement is also used in the second switch
Leakage current between the battery core of the shell and the battery pack that acquire the battery pack when closure is always negative.
Further, the higher-pressure region further includes N number of 4th high voltage interface and N articles of battery core monomer voltage acquisition branch；
I-th of the 4th high voltage interface acquires branch and the corresponding battery core monomer electricity by i-th article of battery core monomer voltage
Pressure acquisition subelement electrical connection；
The battery core monomer voltage acquisition branch includes the first sampling resistor and the second sampling resistor, the first sampling electricity
The first end of resistance is electrically connected with the first end of second sampling resistor, and the position of the electrical connection is intermediate point, and described the
The second end of one sampling resistor is electrically connected with the 4th high voltage interface, the second end and the battery core of second sampling resistor
Monomer voltage acquires subelement electrical connection；
Battery core monomer voltage described in i-th article of battery core monomer voltage acquisition branch and (i+1) articles acquires between branch
It is additionally provided with third switch and equalizing resistance, one end of the equalizing resistance is electrically connected with one end that the third switchs, described
The other end of equalizing resistance is electrically connected with i-th of the 4th high voltage interface, and the other end and (i+1) of the third switch are a
The intermediate point electrical connection, the signal of the control terminal of the third switch and the corresponding battery core monomer voltage acquisition subelement
Control terminal electrical connection；Wherein, N >=1 and N are positive integer；1≤i≤(N-1) and i are positive integer；
The battery core monomer voltage acquisition subelement is also used to control the folding condition of third switch, and opens in the third
It closes and obtains the first equalizing voltage when closing, obtain the second equalizing voltage when the third is switched and opened；The data processing list
Member is used for first equalizing voltage and second equalizing voltage, judges whether the third switch is breaking or short-circuit,
And judge whether the battery core monomer voltage acquisition branch is breaking.
Further, the low-pressure area further includes communication converting unit；
The communication converting unit is for being electrically connected the data processing unit and the data transmission unit, the communication
Converting unit is used to that the data processing unit will to be transmitted to after data conversion that the data transmission unit transmits.
Second aspect, the embodiment of the present invention also provide a kind of battery management method, which can apply first
The battery management system that aspect provides executes, which includes:
The current data of the data acquisition unit acquisition battery pack of the higher-pressure region；
The data transmission unit the working as the collected battery pack of the data acquisition unit of the isolated area
Preceding data are transmitted to the data processing unit；
The data processing unit of the low-pressure area receives working as the battery pack of the data transmission unit transmission
Preceding data, and judge according to the current data state of the battery pack；
Wherein, the isolated area is between the higher-pressure region and the low-pressure area.
Further, the higher-pressure region further includes third switch, equalizing resistance, the 4th high voltage interface and battery core monomer electricity
Pressure acquisition branch, the battery core monomer voltage acquisition branch include the first sampling resistor and the second sampling resistor of electrical connection, institute
State battery management method further include:
The third closes the switch, and the battery core monomer voltage acquisition subelement obtains the battery core monomer in the battery pack
Voltage, be recorded as the first equalizing voltage；
The third switch is opened, and the battery core monomer voltage acquisition subelement obtains the battery core monomer in the battery pack
Voltage, be recorded as the second equalizing voltage；
First equalizing voltage and second equalizing voltage are transmitted at the data by the data transmission unit
Manage unit；
Data processing unit first equalizing voltage and second equalizing voltage, judge that the third is opened
Whether pass is breaking or short-circuit, and judges whether the battery core monomer voltage acquisition branch is breaking.
Battery management system provided in an embodiment of the present invention includes higher-pressure region and low-pressure area；Higher-pressure region is provided with data acquisition
Unit, low-pressure area are provided with data processing unit；It further include isolated area, isolated area is between higher-pressure region and low-pressure area；Isolation
Area includes data transmission unit；Data acquisition unit is used to acquire the current data of battery pack；Data transmission unit will be for that will count
According to the present data transmission of the collected battery pack of acquisition unit to data processing unit；Data processing unit is for receiving data
The current data of the battery pack of transmission unit transmission, and judge according to current data the state of battery pack.It as a result, can be in higher-pressure region
Data acquisition is only carried out, collected data are sent to the data processing list of low-pressure area by the data transmission unit of isolated area
Member, data processing unit are handled data the state to judge battery pack, so as to simplify battery management system, reduce electricity
Management system occupied space in pond reduces the difficulty of hardware and software development in battery management system, shortens the development cycle, and drop
Low cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of battery management system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another battery management system provided in an embodiment of the present invention；
Fig. 3 is the knot of one of battery management system provided in an embodiment of the present invention battery core total voltage Acquisition Circuit framework
Structure schematic diagram；
Fig. 4 is the structural representation of one of battery management system provided in an embodiment of the present invention insulating monitoring circuit framework
Figure；
Fig. 5 is the structural schematic diagram of one of battery management system provided in an embodiment of the present invention equalizing circuit framework；
Fig. 6 is a kind of application scenarios schematic diagram of battery management system provided in an embodiment of the present invention；
Fig. 7 is a kind of flow diagram of battery management method provided in an embodiment of the present invention；
Fig. 8 is the flow diagram of another battery management method provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of battery management system provided in an embodiment of the present invention.Referring to Fig.1, the cell tube
Reason system 00 includes: higher-pressure region 10QZ and low-pressure area 20QZ；Higher-pressure region 10QZ is provided with data acquisition unit 10, low-pressure area 20QZ
It is provided with data processing unit 20；Further include isolated area 30QZ, isolated area 30QZ be located at higher-pressure region 10QZ and low-pressure area 20QZ it
Between；Isolated area 30QZ includes data transmission unit 30；Data acquisition unit 10 is used to acquire the current data of battery pack；Data pass
Defeated unit 30 is used for the present data transmission of the collected battery pack of data acquisition unit 10 to data processing unit 20；Data
The current data of the battery pack that transmission unit 30 transmits for receiving data of processing unit 20, and battery is judged according to current data
The state of packet.
Wherein, it is (exemplary to be integrated in same circuit board by higher-pressure region 10QZ, low-pressure area 20QZ and isolated area 30QZ
, which can be printed circuit board) in, structure is simple, reduces the occupied sky in automobiles of battery management system 00
Between, meanwhile, reduce communication between plates, so that the interference between reducing signal, enhances the standard of the judging result of battery pack state
True property；Secondly, the data acquisition unit 10 in the 10QZ of higher-pressure region is only used for being acquired the current data of battery pack, low-pressure area
Data processing unit 20 in 20QZ is used to receive the current data of battery pack and judges the state of battery pack, and isolation is separately provided
Data transmission unit 30 in area 30QZ, isolated area 30QZ is used for the current number of the collected battery pack of data acquisition unit 10
According to data processing unit 20 is transmitted to, as a result, in the battery management system 00, each sectoring function is clear, soft or hard so as to reduce
The difficulty of part exploitation, shortens the development cycle of battery management system 00.
Wherein, isolated area 30QZ has the creepage distance for meeting safety requirements.Those skilled in the art are it is understood that here
" safety requirements " can refer to the applicable any one or several Electrical Safety standards in this field, this is no longer described in detail in the embodiment of the present invention
It is not construed as limiting.
Illustratively, higher-pressure region 10QZ is electrically connected with the battery core in battery pack.The collected battery of data acquisition unit 10
The current data of packet may include battery core monomer voltage, battery pack total voltage, battery core total voltage, insulating monitoring leakage current, battery core temperature
Degree and skilled person will appreciate that other direct or indirect data for characterizing battery pack states.The group of data acquisition unit 10
At being described below.
Illustratively, the data transfer mode of the data transmission unit 30 of isolated area 30QZ can be optical coupling communication, magnetic coupling
Close communication or skilled person will appreciate that other coupling communication modes, the embodiment of the present invention is not construed as limiting this.
Illustratively, the state of the interpretable battery pack of data processing unit 20 of low-pressure area 20QZ includes the temperature of battery pack
Degree whether be suitable for, for example whether there is a problem of that battery core temperature is excessively high or battery core temperature is too low；The shell of battery pack and battery pack
Between insulation degree；Whether the voltage of battery core monomer is balanced (this partial content is described below)；Certainly, it may also include this
The status information of other battery packs known to the technical staff of field, the embodiment of the present invention are not construed as limiting this.
It should be noted that merely exemplary in Fig. 1, to show higher-pressure region 10QZ, low-pressure area 20QZ and isolated area 30QZ equal
For the rectangle of rule, but not restriction to each region division in battery management system 00 provided in an embodiment of the present invention.?
In other embodiments, the division (including shape) in each region can be set according to the actual demand of battery management system 11
Meter, the embodiment of the present invention are not construed as limiting this.
Optionally, Fig. 2 is the structural schematic diagram of another battery management system provided in an embodiment of the present invention.Reference Fig. 2,
Data acquisition unit 10 includes that multiple battery core monomer voltages acquire subelement 101, and battery core monomer voltage acquisition subelement 101 is used for
Acquire the voltage of the battery core monomer in battery pack；Between each battery core monomer voltage acquisition subelement 101 by the way of daisy chain
It is communicated.
Wherein, it is communicated, can be made each by the way of daisy chain between each battery core monomer voltage acquisition subelement 101
Battery core monomer voltage acquisition subelement 101 is only electrically connected with one or two other battery core monomer voltage acquisition subelement 101, and
It not will form fully connected topology, so as to simplify the communicating circuit design between battery core monomer voltage acquisition subelement 101, into
And the circuit design of data acquisition unit 10 can be simplified, namely be conducive to simplify the circuit design of higher-pressure region 10QZ.
It should be noted that the quantity for showing battery core monomer voltage acquisition subelement 101 merely exemplary in Fig. 2 is 3
It is a, but the restriction not to battery management system 00 provided in an embodiment of the present invention.It in other embodiments, can be according to battery
The actual demand of management system 00, setting battery core monomer voltage acquires the quantity of subelement 101, specifically, battery core monomer voltage
The quantity of acquisition subelement 101 can be configured according to the battery core quantity of battery pack, and particular number can be one or more；And
And the quantity of each battery core monomer voltage acquisition collectable battery core monomer of subelement 101 can also be according to battery management system
00 demand is configured and (is detailed below), and the embodiment of the present invention is not construed as limiting this.
Optionally, with continued reference to Fig. 2, multiple battery core monomer voltage acquisition subelements 101 include the first battery core monomer voltage
Acquire subelement 1011；Data acquisition unit 10 further includes battery pack stagnation pressure acquisition subelement 102, battery core total voltage acquisition son list
First 103, insulating monitoring subelement 104；Battery pack stagnation pressure acquires the output end of subelement 102, battery core total voltage acquires subelement
103 output end and the output end of insulating monitoring subelement 104 acquire 1011 electricity of subelement with the first battery core monomer voltage respectively
Connection；Battery pack stagnation pressure acquisition subelement 102 is used to acquire the total voltage of battery pack, and battery core total voltage acquires subelement 103 and uses
In acquisition battery core total voltage, insulating monitoring subelement 104 is used to monitor the insulation resistance between battery pack and the shell of battery pack,
First battery core monomer voltage acquisition subelement 1011 is also used to acquiring battery pack stagnation pressure into subelement 102, the acquisition of battery core total voltage
The analog signal of subelement 103 and insulating monitoring subelement 104 is converted to digital signal, and is transmitted to data transmission unit 20.
Wherein, the first battery core monomer voltage acquisition subelement 1011 includes analog-to-digital conversion interface, battery pack stagnation pressure acquisition
Output end, the output end of battery core total voltage acquisition subelement 103 and the output end point of insulating monitoring subelement 104 of unit 102
It is not electrically connected with an analog-to-digital conversion interface of the first battery core monomer voltage acquisition subelement 1011, to realize above-mentioned analog signal
To the conversion of digital signal, that is, between the total voltage, battery core total voltage and battery pack and the shell of battery pack for realizing battery pack
Insulation resistance sampling process.Data transmission unit 20 is for adopting the first battery core monomer voltage in data acquisition unit 10
Collect digital data transmission that subelement 101 exports to data processing unit 30.
Illustratively, acquiring the collected battery core monomer voltage of subelement 101 according to battery core monomer voltage can be obtained battery core
The sum of the sum of monomer voltage and mould group voltage (mould group voltage is the supply voltage that battery core monomer voltage acquires subelement 101), will
The sum of the sum of the battery core monomer voltage and mould group voltage, if three matches, can confirm battery pack compared with battery core total voltage
Wiring, acquisition 101 wiring of subelement of battery core monomer voltage and circuit, the wiring of battery core total voltage acquisition subelement 103, mould group electricity
The wiring of pressure is without exception.If thrin mismatches or three mismatches, it is judged as battery pack wiring, battery core monomer
101 wiring of voltage acquisition subelement and circuit, the wiring of battery core total voltage acquisition subelement 103, in the wiring of mould group voltage
One or more exist abnormal.
Illustratively, it may also include power execution unit in battery pack.If the total voltage of battery core total voltage and battery pack with
And the state matching of power execution unit, then it can confirm that the wiring of battery core total voltage acquisition subelement 103, battery pack total voltage are adopted
The wiring, acquisition 101 wiring of subelement of battery core monomer voltage and the wiring of circuit and power execution unit for collecting subelement 102 are equal
For exception.If thrin mismatch or three mismatch, be judged as battery core total voltage acquisition subelement 103 wiring,
Wiring, acquisition 101 wiring of subelement of battery core monomer voltage and the circuit and power of battery pack total voltage acquisition subelement 102 are held
There is exception in one or more in the wiring of row component.Meanwhile in monitoring strategies, battery core monomer voltage acquires subelement
101 communicating interrupts, communication are lost or the state of miscommunication, by the corresponding alarm grade of policy definition and alarm.
It should be noted that the deterministic process in upper two sections of texts, that is, be related to the process of data processing by low-pressure area
The data processing unit 20 of 20QZ is completed.Meanwhile data processing unit 20 may include parameter storage unit 26, parameter storage unit
26 include parameter configuration.The requirement of above-mentioned " matching " is the threshold value set in parameter configuration, if matching in threshold range；
If exceeding threshold range, mismatch.
Illustratively, parameter storage unit 26 may include band electric erazable programmable read-write memory (Electrica-lly
Erasable Programmable read only memory, EEPROM), or skilled person will appreciate that other classes
The element with store function of type, the embodiment of the present invention are not construed as limiting this.
Optionally, with continued reference to Fig. 2, data acquisition unit 10 further includes real-time clock subelement 105；Real-time clock is single
The receiving end of member 105 is electrically connected with the feeder ear of the first battery core monomer voltage acquisition subelement 1011；Real-time clock subelement 105
For acquiring the real time clock information of battery pack, the first battery core monomer voltage acquisition subelement 1011 is also used to as real-time clock
Unit 105 is powered.
Wherein, the first battery core monomer voltage acquisition subelement 1011 can be taken electricity by battery core total voltage, and when being converted to real-time
After the available power supply of clock sub-circuit 105, power for real-time clock sub-circuit 105.
Illustratively, in control strategy, retain a real-time clock before lower electricity, read real time clock information after powering on, point
Not compared with the data stored in parameter storage unit 26, for strategy processing, thus can be improved battery relational system 00 can
By property.Hereinafter it is illustrated by taking relay control and Diagnostic Strategy as an example.
Illustratively, after relay disconnects, battery pack total voltage acquires the total voltage that subelement 102 monitors battery pack, number
Judge according to processing unit 20: if the total voltage of battery pack is lower than the first given threshold, (illustrative, which can be
When normal work, the total voltage of battery pack 60% or 40%), then it is assumed that relay normally disconnects, and circuit is without exception；Otherwise,
Think relay adhesion and alarms.Correlated condition is recorded in parameter storage unit 26, and it is single to power on rear battery pack total voltage acquisition
Member 102 monitors the total voltage of battery pack again, and data processing unit 20 judges: if the total voltage of battery pack is higher than the second setting threshold
Value (it is illustrative, when which can be to work normally, the total voltage of battery pack 20% or 30%), then it is assumed that after
Electric appliance adhesion is simultaneously alarmed；Otherwise, alarm is eliminated, and normally executes power control strategies.
It should be noted that the first given threshold and the second given threshold are not limited to the tool of above-mentioned example shown
Body numerical value can be also arranged according to the actual demand of battery management system 00, and the embodiment of the present invention is not construed as limiting this.Real-time clock
Subelement 105 can also take electricity by battery core total voltage, via powering after other power-switching circuits in circuit board；Alternatively, when real-time
Clock subelement 105 also can be used skilled person will appreciate that other modes power supply, the embodiment of the present invention is not construed as limiting this.
Optionally, with continued reference to Fig. 2, data transmission unit 30 includes that the first transmission subelement 301 and the second transmission are single
Member 302；First transmission subelement 301 be used for the first battery core monomer voltage acquisition subelement 101 and data processing unit 20 it
Between data transmitted；Second transmission subelement 302 is used between real-time clock subelement 105 and data processing unit 20
Data transmitted.
Illustratively, the data between the first battery core monomer voltage acquisition subelement 101 and data processing unit 20 are transmitted
It may include that data processing unit 20 issues data acquisition command, such as the acquisition of battery pack total voltage acquisition, battery core total voltage
Order, battery core monomer voltage acquisition, insulation resistance acquisition etc., and the first transmission subelement of bronze drum 301 is transmitted to
One battery core monomer voltage acquires subelement 101；It and may include that the first battery core monomer voltage acquisition subelement 101 is adopted according to data
Collection order, by the relevant data of the collected battery pack of data acquisition unit 10 of higher-pressure region 10QZ, such as total electricity of battery pack
The data such as the insulation resistance between pressure, battery core total voltage, battery core monomer voltage, battery pack and battery pack case pass through the first transmission
Subelement 301 is transmitted to data processing unit 20.
Illustratively, the data transfer command between real-time clock subelement 105 and data processing unit 20 may include number
Real time clock information acquisition is issued according to processing unit 20, and real-time clock is transmitted to by the second transmission subelement 302
Unit 105；It and may include the real time clock information that real-time clock acquisition subelement 105 acquires battery pack, and passed by second
Defeated subelement 302 is transmitted to data processing unit 20.
Optionally, with continued reference to Fig. 2, the first transmission subelement 301 includes the first Magnetic isolation circuit, the second transmission subelement
302 include the second Magnetic isolation circuit；First Magnetic isolation circuit is used for the first battery core monomer voltage acquisition subelement 1011 and number
It is transmitted according to the data between processing unit 20, the second Magnetic isolation circuit is used for at real-time clock subelement 105 and data
Data between reason unit 20 are transmitted.
Illustratively, serial peripheral built in data processing unit 20 (Serial Peripheral Interface, SPI)
Interface, the SPI interface are logical with real-time clock subelement 105 and the first battery core monomer voltage acquisition subelement 101 after Magnetic isolation
News.
So set, on the one hand there is stronger electromagnetism interference using the first Magnetic isolation circuit and the second Magnetic isolation circuit
Ability, the accuracy of the data transmission of data transmission unit 30 can be improved, so that the state for being conducive to improve battery pack is sentenced
The accuracy of disconnected result.On the other hand, due to Magnetic isolation circuit (including the first Magnetic isolation circuit and the second Magnetic isolation circuit)
Signaling rate is very fast, so as to reduce data transmission unit 30 for data in data acquisition unit 10 and data processing unit
It carries out transmitting the time used between 20, to be conducive to the real-time judge to battery pack state, to be advantageously implemented in real time
Monitoring.
Optionally, with continued reference to Fig. 2, multiple battery core monomer voltage acquisition subelements 101 further include the second battery core monomer electricity
Pressure acquisition subelement 1012 and third battery core monomer voltage acquire subelement 1013；Third battery core monomer voltage acquires subelement
1013 and second carry out bidirectional data transfers between battery core monomer voltage acquisition subelement 1012, the acquisition of the second battery core monomer voltage
Bidirectional data transfers, the first battery core monomer electricity are carried out between subelement 1012 and the first battery core monomer voltage acquisition subelement 1011
Bidirectional data transfers are carried out between pressure acquisition subelement 1011 and data processing unit 20.
Illustratively, by taking orientation shown in Figure 2 as an example, the data acquisition command that data processing unit 20 issues is by first
Battery core monomer voltage acquisition subelement 1011 is vertically transmitted to the second battery core monomer voltage acquisition subelement from bottom to top
1012, third battery core monomer voltage acquires subelement 1013；Certainly by the battery core monomer voltage acquisition collected data of subelement 101
Upper and lower passback, and it is back to data processing unit 20.
Illustratively, which is applicable to 6 strings -36 string concatenated system of battery core, that is, is applicable to not
With string number battery pack system flexible Application.High-voltage connecting mouth region in Fig. 2 may include battery core data acquisition interface, the acquisition of battery core data
Interface is electrically connected to battery core monomer voltage acquisition subelement 101；The quantity of battery core data acquisition interface can be according to battery core serial number
Mesh configuration, battery core is first grouped accesses battery core monomer voltage acquisition subelement 101 afterwards.
Wherein, each battery core monomer voltage acquisition subelement 101 can acquire 6 strings -12 string battery core data, i.e., minimum acquisition
Battery core is transmitted as 6 strings, and can at most acquire battery core string number is 12 strings.Illustratively, when battery core series string number is 6-12 string of string, only
Battery core data are acquired using the first battery core monomer voltage acquisition subelement 1011；When battery core series string number is 13-24 string of string, make
Subelement 1012 is acquired with the first battery core monomer voltage and the second battery core monomer voltage acquisition subelement 1012 acquires battery core data；
When battery core series string number is 25-36 string of string, then subelement 1011, the second battery core monomer are acquired using the first battery core monomer voltage
Voltage acquisition subelement 1012 and third battery core monomer voltage acquisition subelement 1013 acquire battery core data.Herein in principle, electric
Core string number will be distributed as homogeneously as possible into each battery core monomer voltage acquisition subelement 101.
Illustratively, when battery core series string number is 18 string, 1012 He of subelement is acquired using the first battery core monomer voltage
Second battery core monomer voltage acquires subelement 1012 and acquires battery core data, and the first battery core monomer voltage acquires 1012 He of subelement
It is respectively 9 strings that second battery core monomer voltage, which acquires the battery core string number that subelement 1012 acquires,；When battery core series string number is 24 string,
Subelement 1012 is acquired using the first battery core monomer voltage and the second battery core monomer voltage acquisition subelement 1012 acquires battery core number
According to, and the battery core that the first battery core monomer voltage acquisition subelement 1012 and the second battery core monomer voltage acquisition subelement 1012 acquire
Number of going here and there is respectively 12 strings；When battery core series string number is 27 string, subelement 1012 and the are acquired using the first battery core monomer voltage
Two battery core monomer voltages acquire subelement 1012 and acquire battery core data, and the first battery core monomer voltage acquisition subelement 1012 and the
It is respectively 9 strings that two battery core monomer voltages, which acquire the battery core string number that subelement 1012 acquires,.
It should be noted that the exemplary only explanation of specific value of above-mentioned battery core string number, rather than the present invention is implemented
The restriction for the battery management system 00 that example provides.It in other embodiments, can also be according to the practical need of battery management system 00
It asks, under the premise of meeting above-mentioned basic principle, battery core string number is set, the embodiment of the present invention is not construed as limiting this.Meanwhile it is each
String battery core may include multiple battery cores in parallel, and the embodiment of the present invention is not construed as limiting the quantity being connected in parallel on the battery core in a string.
Optionally, with continued reference to Fig. 2, data acquisition unit 10 further includes battery core temperature acquisition subelement 107；Battery core temperature
The output end for acquiring subelement 107 acquires subelement 1012 and third battery core monomer voltage with the second battery core monomer voltage respectively
Subelement 1013 is acquired to be electrically connected；Battery core temperature acquisition subelement 107 is used to acquire the temperature of the battery core in battery pack；Second electricity
Core monomer voltage acquisition subelement 1012 and third battery core monomer voltage acquisition subelement 1013 are used to battery core temperature acquisition
The analog signal of subelement 107 is converted to digital signal, and is transmitted to the first battery core monomer voltage acquisition subelement 1011.
Wherein, the second battery core monomer voltage acquisition subelement 1012 includes analog-to-digital conversion interface, third battery core monomer voltage
Acquire subelement 1013 include analog-to-digital conversion interface, the output end of battery core temperature acquisition subelement 107 respectively with the second battery core list
Bulk voltage acquires the analog-to-digital conversion interface electrical connection of subelement 1012 and third battery core monomer voltage acquisition subelement 1013, can answer
The conversion of analog signal to digital signal is realized with any analog-to-digital conversion interface.Certainly, battery core temperature acquisition subelement 107
The analog-to-digital conversion subelement that can be also separately provided with one in circuit board of output end be electrically connected, when the second battery core monomer voltage is adopted
When collection subelement 1012 and third battery core monomer voltage acquisition subelement 1013 do not work, it can be turned by the modulus that this is separately provided
The analog-to-digital conversion that subelement realizes the temperature of battery core is changed, and is transmitted to the first battery core monomer voltage acquisition subelement 1011.
Illustratively, the data acquisition command that data processing unit 20 issues may also include the instruction of battery core temperature acquisition, electricity
The data that core monomer voltage acquisition subelement 101 returns may also include the temperature data of battery core.
Optionally, with continued reference to Fig. 2, data acquisition unit 10 includes that the first communication subelement 1061 and the second communication are single
Member 1062；First communication subelement 1061 is used to acquire third battery core monomer voltage subelement 1013 and the second battery core monomer electricity
Data between pressure acquisition subelement 1012 are transmitted；Second communication subelement 1062 is for adopting the second battery core monomer voltage
Data between collection subelement 1012 and the first battery core monomer voltage acquisition subelement 1011 are transmitted.
Illustratively, the data acquisition command that data processing unit 20 issues acquires subelement by the first battery core monomer voltage
1011 are transmitted to the second battery core monomer voltage acquisition subelement 1012 through the first communication subelement 1061, then by the second battery core monomer
Voltage acquisition subelement 1012 is transmitted to third battery core monomer voltage acquisition subelement 1013 through the second communication subelement 1062.By
Third battery core monomer voltage acquires the collected data of subelement 1013 and is back to the second battery core through the second communication subelement 1062
Monomer voltage acquires subelement 1012, and the second battery core monomer voltage acquires subelement 1012 by received return data and by certainly
The collected data of body are back to the first battery core monomer voltage acquisition subelement 1011 through the first communication subelement 1061；First electricity
Core monomer voltage acquires subelement 1011 by received return data and by itself collected data back to data processing
Unit 20.
As a result, by the transmitted in both directions of data in single path, data acquisition unit 10 and data processing unit 20 can be simplified
Between communicating circuit design, that is, simplify the circuit design of data transmission unit 30, so as to simplify battery management system 00
Design.
Optionally, with continued reference to Fig. 2, the first communication subelement 1061 includes third Magnetic isolation circuit, and the second communication is single
Member 1062 includes the 4th Magnetic isolation circuit；Third Magnetic isolation circuit be used for third battery core monomer voltage acquisition subelement 1013 with
Data between second battery core monomer voltage acquisition subelement 1012 are transmitted；4th Magnetic isolation circuit is used for the second battery core
Data between monomer voltage acquisition subelement 1012 and the first battery core monomer voltage acquisition subelement 1011 are transmitted.
So set, on the one hand there is stronger electromagnetism interference using third Magnetic isolation circuit and the 4th Magnetic isolation circuit
Ability, the accuracy of the data transmission of the first communication subelement 1061 and the second communication subelement 1062 can be improved, to have
Conducive to the accuracy of the judging result for the state for improving battery pack.On the other hand, due to Magnetic isolation circuit (including third Magnetic isolation
Circuit and the 4th Magnetic isolation circuit) signaling rate it is very fast, so as to reduce the first communication subelement 1061 and second logical
Data are carried out transmitting the time used by news subelement 1062 in battery core monomer voltage acquisition subelement 101, to be conducive to
To the real-time judge of battery pack state, to be advantageously implemented real-time monitoring.
Optionally, Fig. 3 is one of battery management system provided in an embodiment of the present invention battery core total voltage Acquisition Circuit
The structural schematic diagram of framework.In conjunction with Fig. 2 and Fig. 3, it includes first choice circuit 1081 that battery core total voltage, which acquires subelement 103,；It is high
Pressure area 10QZ further includes the first high voltage interface 1H1, the second high voltage interface 1H2 and third being electrically connected with first choice circuit 1081
High voltage interface 1H3；An input terminal of the first high voltage interface 1H1 also with the first battery core monomer voltage acquisition subelement 1011 is electrically connected
It connects, the second high voltage interface 1H2 is also electrically connected with an input terminal of the second battery core monomer voltage acquisition subelement 1012, third high pressure
Interface 1H3 is also electrically connected with an input terminal of third battery core monomer voltage acquisition subelement 1013, first choice circuit 1081
Output end is electrically connected with an analog-to-digital conversion interface of the first battery core monomer voltage acquisition subelement 1011；First choice circuit 1081
For total according to the voltage output battery core on the first high voltage interface 1H1, the second high voltage interface 1H2 and third high voltage interface 1H3
Voltage and characterization voltage；The mould that first battery core monomer voltage acquisition subelement 1011 is also used to export in first choice circuit 1081
Quasi- signal is converted to digital signal, and is transmitted to data transmission unit 20.
Illustratively, data processing unit 20 generally can be in micro-control unit (Microcontroller Unit, MCU)
Central processing unit, wherein micro-control unit is also known as one chip microcomputer or single-chip microcontroller, micro-control unit may include other
Component hereinafter illustratively illustrates.
Wherein, the accessible voltage of central processing unit is usually low pressure, and table positive voltage is a low pressure token state, characterizes voltage
Corresponding with battery core monomer voltage, i.e., corresponding with the voltage of battery core string, central processing area can be according to characterization voltage and built-in characterization
The corresponding relationship of voltage and battery core monomer voltage is back-calculated to obtain battery core monomer voltage.
Illustratively, characterization voltage is 4V, and counter push away can obtain battery core monomer voltage as 8V.This certain exemplary only theory
It is bright.It should be noted that battery core monomer voltage can be passed through divider resistance to obtain the above-mentioned characterization voltage in low pressure range
It is divided, therefore, characterization voltage is alternatively referred to as the partial pressure of battery core monomer voltage.
Optionally, Fig. 4 is one of battery management system provided in an embodiment of the present invention insulating monitoring circuit framework
Structural schematic diagram.In conjunction with Fig. 1 and Fig. 4, insulating monitoring subelement 104 includes the second selection circuit 1082, and higher-pressure region 10QZ is also wrapped
Include voltage conversion circuit 109；First high voltage interface 1H1, the second high voltage interface 1H2 and third high voltage interface 1H3 are respectively with second
The input terminal of selection circuit 1082 is electrically connected；The output end of second selection circuit 1082 is electrically connected with data processing unit 20, the
By first switch K1, with low pressure DYD is electrically connected the control terminal of two selection circuits 1082；The high-voltage end of voltage conversion circuit 109
With high pressure (in Fig. 4 illustratively with high pressure interface 1HG with showing high pressure) is electrically connected, the low pressure of voltage conversion circuit 109
By second switch K2, with low pressure DYD is electrically connected at end, and the output end of voltage conversion circuit 109 is adopted with the first battery core monomer voltage
Collect the analog-to-digital conversion interface electrical connection of subelement 1011；The control terminal of first switch K1 and the control terminal of data processing unit 20
Mouth electrical connection, the control terminal of second switch K2 are electrically connected with the control port of the first battery core monomer voltage acquisition subelement 1011；
Second selection circuit 1082 be used for first switch K1 closure when acquisition battery pack shell and battery pack battery core always just between
Leakage current, the first battery core monomer voltage acquisition subelement 1011 is also used to the outer of when second switch K2 is closed acquisition battery pack
Leakage current between the battery core of shell and battery pack is always negative.
Wherein, battery core is always just being the anode of the highest economize on electricity core of voltage after battery core series connection, and battery core is always born as battery core series connection
The cathode of the minimum economize on electricity core of voltage afterwards；The shell of battery pack with can be regarded as low pressure DYD.
Illustratively, the insulation of the shell of battery pack is always right against for voltage, detection process can are as follows: data processing unit
Universal input/output built in 20 (General Purpose Input Output, GPIO) interface, GPIO interface control first
Switch K1 be closed when, can gate voltage always just with low pressure the connection of DYD, this " connection " can be regarded as electric current by third high-voltage connecting
Mouth 1H3 successively passes through the second selection circuit 1082 and first switch K1 with flowing to low pressure DYD.The shell of battery pack and battery pack
Battery core always just between leakage current the analog-to-digital conversion interface of data processing unit 20 is input to after the second selection circuit 1082,
The analog-to-digital conversion of leakage current is completed by data processing unit 20.
Illustratively, the insulation of the shell for battery pack is always born for voltage, detection process can are as follows: data processing unit
20 are communicated by the first Magnetic isolation circuit 301, make the GPIO interface control built in the first battery core monomer voltage acquisition subelement 1011
Second switch K2 closure processed, the connection that DYD and battery core are always born with gating low pressure at this time, this " connection " can be regarded as electric current by low pressure
Ground DYD successively passes through second switch K2 and voltage conversion circuit 109 with flowing to high pressure interface 1HG.The shell and battery of battery pack
Leakage current between the battery core of packet is always negative acquires the another analog-to-digital conversion interface of subelement 1011 by the first battery core monomer voltage
Analog-to-digital conversion is completed, is back to data processing unit 20 finally by Magnetic isolation communication.
Data processing unit 20 according in above-mentioned two detection process leakage current, in the second selection circuit 1082 it is built-in
Parallel resistance, formula preset in built-in virtual resistance and parameter storage unit 26, calculates in voltage conversion circuit 109
The total face low pressure of battery core DYD insulation resistance, and calculate battery core and always bear to low pressure the insulation resistance of DYD and according to exhausted
The size judgement insulation situation of edge resistance.
Illustratively, using the total face low pressure of battery core the insulation resistance of DYD as example, insulation resistance size be 20K Ω/
When 100V-50K Ω/100V, it is believed that battery core always insulate just between the shell of battery pack good；When the size of insulation resistance is low
In 20K Ω/100V, it is believed that battery core always just insulate between the shell of battery pack poor.Certainly, the numberical range is merely illustrative
The explanation of property, rather than the restriction to battery management system 00 provided in an embodiment of the present invention.It in other embodiments, can also root
According to the actual demand of battery management system 00, the threshold range of insulation resistance is set, the embodiment of the present invention is not construed as limiting this.
Optionally, Fig. 5 is the structure of one of battery management system provided in an embodiment of the present invention equalizing circuit framework
Schematic diagram.In conjunction with Fig. 1 and Fig. 5, higher-pressure region 10QZ further includes N number of 4th high voltage interface 1H4 and N articles of battery core monomer voltage acquisition
Branch 1CJ；I-th of the 4th high voltage interface 1H4 (i) pass through i-th article of battery core monomer voltage acquisition branch 1CJ (i) and corresponding electricity
Core monomer voltage acquires subelement 101 and is electrically connected；Battery core monomer voltage acquire branch 1CJ include the first sampling resistor 1CJR1 and
(illustrative, i-th battery core monomer voltage acquisition branch 1CJ (i) may include i to second sampling resistor 1CJR2 shown in Fig. 5
The second sampling resistor of the first sampling resistor of channel and the channel i；(i+1) article battery core monomer voltage acquisition branch 1CJ (i+1) can wrap
Include the first sampling resistor of the channel (i+1) and the second sampling resistor of the channel (i+1)), the first end of the first sampling resistor 1CJR1 and the
The first end of two sampling resistor 1CJR2 is electrically connected, and the position of the electrical connection is intermediate point 1CJZ, the first sampling resistor 1CJR1's
Second end is electrically connected with the 4th high voltage interface 1H4, and second end and battery core monomer voltage acquisition of the second sampling resistor 1CJR2 is single
Member 101 is electrically connected；I-th article of battery core monomer voltage acquisition branch 1CJ (i) and (i+1) article battery core monomer voltage acquires branch 1CJ
(i+1) third switch 1JHK and equalizing resistance 1JHR, one end of equalizing resistance 1JHR and third switch 1JHK are additionally provided between
One end electrical connection, the other end of equalizing resistance 1JHR is electrically connected with i-th of the 4th high voltage interface 1H4 (i), third switch 1JHK
The other end be electrically connected with (i+1) a intermediate point 1CJZ (i+1), the control terminal of third switch 1JHK and corresponding battery core monomer
The signal control terminal of voltage acquisition subelement 101 is electrically connected；Wherein, N >=1 and N are positive integer；1≤i≤(N-1) and i are positive whole
Number；Battery core monomer voltage acquisition subelement 101 is also used to control the folding condition of third switch 1JHK, and in third switch 1JHK
The first equalizing voltage is obtained when closure, obtains the second equalizing voltage when third switch 1JHK is opened；Data processing unit 20 is used
In comparing the first equalizing voltage and the second equalizing voltage, it is whether breaking or short-circuit to judge third switch 1JHK, and judge battery core
Whether monomer voltage acquires branch 1CJ breaking.
Wherein, " battery core data acquisition interface " above may include N number of 4th high voltage interface 1H4.N number of 4th high-voltage connecting
Mouthful 1H4 and N battery core monomer voltage acquisition branch 1CJ connect one to one, battery core monomer voltage acquire branch 1CJ with it is corresponding
Battery core monomer voltage acquisition subelement 101 electrical connection can based on above to " battery core monomer voltage acquisition subelement 101 include
First battery core monomer voltage acquires subelement 1011, the second battery core monomer voltage acquisition subelement 1012 and Third monomer voltage
When acquiring subelement 1013 ", (it is single that first selection which or which battery core monomer voltage acquires son to the distribution principle of battery core string number
Member 101 is being distributed as homogeneously as possible) understand, details are not described herein.
Wherein, the current branch where equalizing resistance 1JHR can lead to it (is i.e. opened by intermediate point 1CJZ via third in Fig. 5
Close 1JHK, equalizing resistance 1JHR to the 4th high voltage interface 1H4 branch) leakage current it is larger, i.e. on the first sampling resistor 1CJR1
Partial pressure it is larger.If third switch 1JHK is closed, there is pressure drop on the first sampling resistor 1CJR1；When third switch 1JHK is opened,
Without pressure drop on first sampling resistor 1CJR1；That is the second equalizing voltage then judges that equalizing circuit is normal less than the first equalizing voltage,
That is there is no there is no open circuits in circuit break and short circuit and battery core monomer voltage acquisition branch 1CJ by third switch 1JHK；Otherwise,
It can determine whether that there are at one or place exceptions in wiring and the equalizing circuit in battery pack, that is, have the 1JHK open circuit or disconnected of third switch
There is breaking at least one situation in road or battery core monomer voltage acquisition branch 1CJ.
It should be noted that " the second equalizing voltage is less than the first equalizing voltage " here can be regarded as the second equalizing voltage
Difference between the first equalizing voltage is less than preset threshold.
It optionally, further include communication converting unit 21 with continued reference to Fig. 2, low-pressure area 20QZ；Communication converting unit 21 is used for
It is electrically connected 20 yuan of data processing list and data transmission unit 30, communication converting unit 21 is used to transmit data transmission unit 30
Data processing unit 20 is transmitted to after data conversion.
Illustratively, in conjunction with above, built in data processing unit when SPI interface, communication converting unit 21 can communicate for SPI
Converting unit.
Illustratively, with continued reference to Fig. 2, low-pressure area may also include that power conversion unit 22, low voltage communication unit 23, mould
Quasi-/digital IO unit 24 and dynamic Control driving unit 25；Wherein, the input terminal and low pressure of power conversion unit 22
One power supply interface of interface area is electrically connected, and output end is electrically connected with data processing unit 20 and parameter storage unit 26 respectively, low
The first end of pressure communication unit 23 is electrically connected with a communication interface in low-voltage interface area, analog/digital input-output unit 24
First end is electrically connected with an input/output interface in low-voltage interface area, the first end and low-voltage interface of dynamic Control driving unit 25
The one dynamic Control interface in area is electrically connected；The second of the second end of low voltage communication unit 23, analog/digital input-output unit 24
It holds, the second end of dynamic Control driving unit 25 is electrically connected with a control terminal of data processing unit 20 respectively.
Illustratively, power conversion unit 22 is used to be converted to high-voltage electricity low tension, and gives 20 He of data processing unit
Parameter storage unit 26 is powered.Wherein, " high-voltage electricity is converted into low tension " can for by the voltage of 24V be converted to 5V, 3.3V,
The utilization voltage of composition component in 1.8V, 1.5V or other single-chip microcontrollers, or can for by the voltage of 12V be converted to 5V, 3.3V,
The utilization voltage of 1.8V, 1.5V or the composition component in other single-chip microcontrollers, the setting about low pressure can be according to the group in single-chip microcontroller
It is arranged at the utilization voltage of component, the embodiment of the present invention is not construed as limiting this.
Illustratively, analog/digital input-output unit 24 is mainly realized with 20 configuration mode of data processing unit and is exported
Direction selection, cooperation amplifying circuit do small current driving, such as the wake-up signal of indicator light driving, other external equipments；May be used also
To be configured to analog-to-digital conversion input detection, such as detection of additional environment temperature.
Illustratively, Fig. 6 is a kind of application scenarios schematic diagram of battery management system provided in an embodiment of the present invention.Reference
Fig. 6, battery pack 40 may include battery management system 00, the battery core string 401 that is electrically connected with battery management system 00, power enforcement division
Part 402 and charging/discharging apparatus 50.In conjunction with Fig. 2 and Fig. 6, the control terminal and dynamic Control driving unit 25 of power execution unit 402
Electrical connection, the control terminal of charging/discharging apparatus 50 are electrically connected with low voltage communication unit 23, the first end and electricity of power execution unit 402
The anode electrical connection of core string 401, second end is electrically connected with the first end of charging/discharging apparatus 50, the second end of charging/discharging apparatus 50 and
The cathode of battery core string 401 is electrically connected.Illustratively, power execution unit 402 can be a switch, when the switch is closed, battery core string
401 for charging/discharging apparatus 50 for powering, and battery management system 00 is used to monitor the state of battery pack 40.In conjunction with Fig. 2 and Fig. 6,
Whether dynamic Control driving unit 25 is used to control the work of power execution unit 402, low voltage communication unit 23 is at data
The data managed between unit 20 and charging/discharging apparatus 50 are transmitted.
It should be noted that merely exemplary in above-mentioned Fig. 2-Fig. 6 have electrical connection with straight line or broken line connection
Component units or subelement merely to clearly and simply showing connection relationship, and not implement the battery provided to the present invention
The restriction of the application scenarios of management system 00 and battery management system 00.It in other embodiments, can be according to battery management
The spatial relation of each component units and subelement, and the actual form of setting line is arranged in the actual demand of system 00,
The embodiment of the present invention is not construed as limiting this.
Based on the same inventive concept, the embodiment of the present invention also provides a kind of battery management method, which can
It is executed using the battery management system that above embodiment provides, therefore, which also has above embodiment
Beneficial effect possessed by the battery management system of offer, non-explained in details place can refer to understanding above, and details are not described herein.
Illustratively, Fig. 7 is a kind of flow diagram of battery management method provided in an embodiment of the present invention.Referring to Fig. 7, the cell tube
Reason method includes:
S61, higher-pressure region data acquisition unit acquisition battery pack current data.
Illustratively, Fig. 1 and Fig. 2 be can refer to, current data includes the total voltage of battery pack, battery core total voltage, battery core list
Bulk voltage, battery pack shell and battery pack between insulation resistance, battery core temperature and real time clock information.The step can manage
Solution is that the current data of above-mentioned battery pack is obtained by each subelement in data acquisition unit 10, and specific acquisition modes can be ability
One or more modes, the embodiment of the present invention known to field technique personnel are not construed as limiting this.
S62, isolated area data transmission unit by the present data transmission of the collected battery pack of data acquisition unit extremely
Data processing unit.
Illustratively, it can refer to Fig. 2, the data transmission unit 30 of isolated area 30QZ includes the first Magnetic isolation circuit and second
The current data of above-mentioned battery pack is rapidly and accurately transmitted to data processing in such a way that Magnetic isolation communicates by Magnetic isolation circuit
Unit.
The current data of the battery pack of the data processing unit reception data transmission unit transmission of S63, low-pressure area, and according to
Current data judges the state of battery pack.
The state of battery pack include battery pack temperature whether be suitable for, for example whether there are battery core temperature is excessively high or battery core temperature
Spend low problem；Insulation degree between battery pack and the shell of battery pack；Whether the voltage of battery core monomer is balanced；On and
It is shown in text or skilled person will appreciate that other battery packs state, the embodiment of the present invention is not construed as limiting this.
Wherein, isolated area is between higher-pressure region and low-pressure area.
Illustratively, referring to Fig.1 or Fig. 2, higher-pressure region 10QZ, low-pressure area 20QZ and isolated area 30QZ be integrated in it is same
In block circuit board (illustrative, which can be printed circuit board), structure is simple, reduces battery management system 00 whole
Occupied space in vehicle, meanwhile, reduce communication between plates, so that the interference between reducing signal, enhances battery pack state
Judging result accuracy；Secondly, the data acquisition unit 10 in the 10QZ of higher-pressure region is only used for the current data to battery pack
It is acquired, the data processing unit 20 in low-pressure area 20QZ is used to receive the current data of battery pack and judges the shape of battery pack
Isolated area 30QZ is separately provided in state, and the data transmission unit 30 in isolated area 30QZ is for collecting data acquisition unit 10
Battery pack present data transmission to data processing unit 20, as a result, in the battery management system 00, each sectoring function is bright
Really, so as to reduce the difficulty of hardware and software development, shorten the development cycle of battery management system 00.
Optionally, Fig. 8 is the flow diagram of another battery management method provided in an embodiment of the present invention, referring to Fig. 5
And Fig. 8, battery management method may also include that
S71, third close the switch, and battery core monomer voltage acquires the voltage for the battery core monomer that subelement obtains in battery pack,
It is recorded as the first equalizing voltage.
S72, third switch are opened, and battery core monomer voltage acquires the voltage for the battery core monomer that subelement obtains in battery pack,
It is recorded as the second equalizing voltage.
First equalizing voltage and the second equalizing voltage are transmitted to data processing unit by S73, data transmission unit.
S74, data processing unit compare the first equalizing voltage and the second equalizing voltage, judge third switch whether open circuit or
Short circuit, and judge whether battery core monomer voltage acquisition branch is breaking.
Above-mentioned S71-S74 shows the battery core balanced way in battery management method, and concrete principle and process can refer to
Explanation of the text to Fig. 5, details are not described herein
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts, any combination and substitution are without departing from protection scope of the present invention.Therefore, although by above embodiments to this
Invention is described in further detail, but the present invention is not limited to the above embodiments only, is not departing from present inventive concept
In the case of, it can also include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (16)
1. a kind of battery management system characterized by comprising higher-pressure region and low-pressure area；
The higher-pressure region is provided with data acquisition unit, and the low-pressure area is provided with data processing unit；
It further include isolated area, the isolated area is between the higher-pressure region and the low-pressure area；The isolated area includes data
Transmission unit；
The data acquisition unit is used to acquire the current data of battery pack；
The data transmission unit is used for the present data transmission of the collected battery pack of the data acquisition unit extremely
The data processing unit；
The current data of the battery pack of the data processing unit for receiving the data transmission unit transmission, and according to
The current data judges the state of the battery pack.
2. battery management system according to claim 1, which is characterized in that the data acquisition unit includes multiple battery cores
Monomer voltage acquires subelement, and the battery core monomer voltage acquisition subelement is used to acquire the battery core monomer in the battery pack
Voltage；
It is communicated by the way of daisy chain between each battery core monomer voltage acquisition subelement.
3. battery management system according to claim 2, which is characterized in that the multiple battery core monomer voltage acquisition is single
Member includes that the first battery core monomer voltage acquires subelement；
The data acquisition unit further includes battery pack stagnation pressure acquisition subelement, battery core total voltage acquisition subelement, insulating monitoring
Subelement；
The output end of battery pack stagnation pressure acquisition subelement, the output end of battery core total voltage acquisition subelement and it is described absolutely
The output end of edge monitoring subelement is electrically connected with the first battery core monomer voltage acquisition subelement respectively；
The battery pack stagnation pressure acquisition subelement is used to acquire the total voltage of the battery pack, and battery core total voltage acquisition is single
Member for acquiring battery core total voltage, the insulating monitoring subelement be used to monitor the battery pack and the battery pack shell it
Between insulation resistance, the first battery core monomer voltage acquisition subelement be also used to acquire the battery pack stagnation pressure subelement,
The analog signal of the battery core total voltage acquisition subelement and the insulating monitoring subelement is converted to digital signal, and is transmitted to
The data transmission unit.
4. battery management system according to claim 3, which is characterized in that when the data acquisition unit further includes real-time
Clock subelement；
The receiving end of the real-time clock subelement is electrically connected with the feeder ear of the first battery core monomer voltage acquisition subelement；
The real-time clock subelement is used to acquire the real time clock information of the battery pack, and the first battery core monomer voltage is adopted
Collection subelement is also used to as real-time clock subelement power supply.
5. battery management system according to claim 4, which is characterized in that the data transmission unit includes the first transmission
Subelement and the second transmission subelement；
First transmission subelement is used for the first battery core monomer voltage acquisition subelement and the data processing unit
Between data transmitted；Second transmission subelement is used for the real-time clock subelement and the data processing list
Data between member are transmitted.
6. battery management system according to claim 5, which is characterized in that first transmission subelement includes the first magnetic
Isolation circuit, second transmission subelement include the second Magnetic isolation circuit；
The first Magnetic isolation circuit is used for the first battery core monomer voltage acquisition subelement and the data processing unit
Between data transmitted, the second Magnetic isolation circuit be used for the real-time clock subelement and the data processing list
Data between member are transmitted.
7. battery management system according to claim 3, which is characterized in that the multiple battery core monomer voltage acquisition is single
Member further includes the second battery core monomer voltage acquisition subelement and third battery core monomer voltage acquisition subelement；
It is carried out between the third battery core monomer voltage acquisition subelement and the second battery core monomer voltage acquisition subelement double
It is transmitted to data, between the second battery core monomer voltage acquisition subelement and the first battery core monomer voltage acquisition subelement
Bidirectional data transfers are carried out, are carried out between the first battery core monomer voltage acquisition subelement and the data processing unit two-way
Data transmission.
8. battery management system according to claim 7, which is characterized in that the data acquisition unit includes the first communication
Subelement and the second communication subelement；
The first communication subelement is used for third battery core monomer voltage acquisition subelement and the second battery core monomer
Data between voltage acquisition subelement are transmitted；
The second communication subelement is used for the second battery core monomer voltage acquisition subelement and the first battery core monomer
Data between voltage acquisition subelement are transmitted.
9. battery management system according to claim 8, which is characterized in that the first communication subelement includes third magnetic
Isolation circuit, the second communication subelement includes the 4th Magnetic isolation circuit；
The third Magnetic isolation circuit is used for third battery core monomer voltage acquisition subelement and the second battery core monomer
Data between voltage acquisition subelement are transmitted；
The 4th Magnetic isolation circuit is used for the second battery core monomer voltage acquisition subelement and the first battery core monomer
Data between voltage acquisition subelement are transmitted.
10. battery management system according to claim 7, which is characterized in that the data acquisition unit further includes battery core
Temperature acquisition subelement；
The output end of the battery core temperature acquisition subelement acquires subelement and the with the second battery core monomer voltage respectively
Three battery core monomer voltages acquire subelement electrical connection；
The battery core temperature acquisition subelement is used to acquire the temperature of the battery core in the battery pack；The second battery core monomer electricity
Pressure acquisition subelement and third battery core monomer voltage acquisition subelement are used to the simulation of the battery core temperature acquisition subelement
Signal is converted to digital signal, and is transmitted to the first battery core monomer voltage acquisition subelement.
11. battery management system according to claim 7, which is characterized in that the battery core total voltage acquires subelement packet
Include first choice circuit；The higher-pressure region further includes the first high voltage interface being electrically connected with the first choice circuit, second high
Crimp mouth and third high voltage interface；
First high voltage interface is also electrically connected with an input terminal of the first battery core monomer voltage acquisition subelement, and described the
Two high voltage interfaces are also electrically connected with an input terminal of the second battery core monomer voltage acquisition subelement, the third high voltage interface
Also with the third battery core monomer voltage acquisition subelement an input terminal be electrically connected, the output end of the first choice circuit and
The analog-to-digital conversion interface electrical connection of the first battery core monomer voltage acquisition subelement；
The first choice circuit is used for according to first high voltage interface, second high voltage interface and the third high pressure
Voltage output battery core total voltage and characterization voltage on interface；
The first battery core monomer voltage acquisition subelement is also used to convert the analog signal of the first choice circuit output
For digital signal, and it is transmitted to the data transmission unit.
12. battery management system according to claim 11, which is characterized in that the insulating monitoring subelement includes second
Selection circuit, the higher-pressure region further include voltage conversion circuit；
First high voltage interface, second high voltage interface and the third high voltage interface respectively with second selection circuit
Input terminal electrical connection；The output end of second selection circuit is electrically connected with the data processing unit, second selection
The control terminal of circuit with low pressure is electrically connected by first switch；
The high-voltage end of the voltage conversion circuit with high pressure is electrically connected, and the low-pressure end of the voltage conversion circuit is opened by second
Pass is electrically connected with the low pressure, and the output end of the voltage conversion circuit and the first battery core monomer voltage acquire subelement
An analog-to-digital conversion interface electrical connection；
The control terminal of the first switch is electrically connected with the control port of the data processing unit, the control of the second switch
It holds and is electrically connected with the control port of the first battery core monomer voltage acquisition subelement；
Second selection circuit be used for the first switch closure when acquire the battery pack shell and the battery pack
Battery core always just between leakage current, the first battery core monomer voltage acquisition subelement is also used to be closed in the second switch
When acquire the battery pack shell and the battery pack battery core always bear between leakage current.
13. battery management system according to claim 2, which is characterized in that the higher-pressure region further includes N number of 4th high pressure
Interface and N battery core monomer voltage acquire branch；I-th of the 4th high voltage interface passes through i-th article of battery core monomer electricity
Pressure acquisition branch is electrically connected with the corresponding battery core monomer voltage acquisition subelement；
The battery core monomer voltage acquisition branch includes the first sampling resistor and the second sampling resistor, first sampling resistor
First end is electrically connected with the first end of second sampling resistor, and the position of the electrical connection is intermediate point, and described first adopts
The second end of sample resistance is electrically connected with the 4th high voltage interface, the second end of second sampling resistor and the battery core monomer
The electrical connection of voltage acquisition subelement；
Battery core monomer voltage described in i-th article of battery core monomer voltage acquisition branch and (i+1) articles acquires also to be set between branch
It is equipped with third switch and equalizing resistance, one end of the equalizing resistance is electrically connected with one end that the third switchs, the equilibrium
The other end of resistance is electrically connected with i-th of the 4th high voltage interface, and the other end and (i+1) of the third switch are a described
Intermediate point electrical connection, the control terminal of the third switch are controlled with the signal of the corresponding battery core monomer voltage acquisition subelement
End electrical connection；Wherein, N >=1 and N are positive integer；1≤i≤(N-1) and i are positive integer；
The battery core monomer voltage acquisition subelement is also used to control the folding condition of third switch, and closes in third switch
The first equalizing voltage is obtained when conjunction, obtains the second equalizing voltage when the third is switched and opened；The data processing unit is used
In first equalizing voltage and second equalizing voltage, judge whether the third switch is breaking or short-circuit, and
Judge whether the battery core monomer voltage acquisition branch is breaking.
14. battery management system according to claim 2, which is characterized in that the low-pressure area further includes that communication conversion is single
Member；
The communication converting unit is for being electrically connected the data processing unit and the data transmission unit, the communication conversion
Unit is used to that the data processing unit will to be transmitted to after data conversion that the data transmission unit transmits.
15. a kind of battery management method, which is characterized in that held using the described in any item battery management systems of claim 1-14
Row, the battery management method include:
The current data of the data acquisition unit acquisition battery pack of the higher-pressure region；
The data transmission unit of the isolated area is by the current number of the collected battery pack of the data acquisition unit
According to being transmitted to the data processing unit；
The data processing unit of the low-pressure area receives the current number of the battery pack of the data transmission unit transmission
According to, and judge according to the current data state of the battery pack；
Wherein, the isolated area is between the higher-pressure region and the low-pressure area.
16. battery management method according to claim 15, which is characterized in that the higher-pressure region further include third switch,
Equalizing resistance, the 4th high voltage interface and battery core monomer voltage acquire branch, and the battery core monomer voltage acquisition branch includes electricity
The first sampling resistor and the second sampling resistor of connection, the battery management method further include:
The third closes the switch, and the battery core monomer voltage acquisition subelement obtains the electricity of the battery core monomer in the battery pack
Pressure, is recorded as the first equalizing voltage；
The third switch is opened, and the battery core monomer voltage acquisition subelement obtains the electricity of the battery core monomer in the battery pack
Pressure, is recorded as the second equalizing voltage；
First equalizing voltage and second equalizing voltage are transmitted to the data processing list by the data transmission unit
Member；
Data processing unit first equalizing voltage and second equalizing voltage judge that the third switch is
No open circuit or short circuit, and judge whether the battery core monomer voltage acquisition branch is breaking.
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| CN113212247A (en) * | 2021-06-18 | 2021-08-06 | 中国第一汽车股份有限公司 | Management system and new energy automobile of power battery package |
| CN113928124A (en) * | 2021-11-10 | 2022-01-14 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Battery management system for electric automobile and electric automobile |
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| CN110632524A (en) * | 2019-11-20 | 2019-12-31 | 新誉轨道交通科技有限公司 | Battery pack insulation detection system, battery pack system and working method |
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| CN113212247A (en) * | 2021-06-18 | 2021-08-06 | 中国第一汽车股份有限公司 | Management system and new energy automobile of power battery package |
| CN113928124A (en) * | 2021-11-10 | 2022-01-14 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Battery management system for electric automobile and electric automobile |
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