CN106154169A - The monitoring voltage of battery modules - Google Patents
The monitoring voltage of battery modules Download PDFInfo
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- CN106154169A CN106154169A CN201610306905.0A CN201610306905A CN106154169A CN 106154169 A CN106154169 A CN 106154169A CN 201610306905 A CN201610306905 A CN 201610306905A CN 106154169 A CN106154169 A CN 106154169A
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- voltage
- battery unit
- monitoring
- battery
- balanced discharge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The present invention relates to the monitoring voltage of battery modules, belong to technical field of battery management.In the voltage monitoring device of the present invention and voltage monitoring method, the resistance value of the multiplexing part of the voltage acquisition circuit of any battery unit that balanced discharge loop based on each battery unit being in balanced discharge process is adjacent with this battery unit or this battery unit, by gathering the electric current in this balanced discharge loop, calculate the pressure drop of this multiplexing part as compensating voltage, and then determine this battery unit or the monitoring voltage value of the adjacent any battery unit of this battery unit.Voltage monitoring device and the voltage monitoring method of the present invention are accurate to the monitoring voltage of battery unit.
Description
Technical field
The invention belongs to technical field of battery management, relate to using monitoring voltage integrated circuit to the battery in battery modules
Unit carries out the voltage monitoring device of monitoring voltage, monitoring voltage integrated circuit and voltage monitoring method.
Background technology
In technical field of battery management, the energy module constituted for many battery modules is needed to carry out battery management, side
Just the needs of battery management, it is desirable to each battery unit in each battery modules is carried out such as monitoring voltage, accordingly, it would be desirable to
Accurate acquisition or detection obtain the magnitude of voltage of each battery unit as monitoring voltage value.
It is currently, there are various types of special IC (ASIC) to gather often as monitoring voltage integrated circuit (IC)
The magnitude of voltage of each battery unit in individual battery modules, such as, the LTC6804 (6-12) of Linear (LT) company, Texas Instrument
(TI) bq76PL455 (6-16) and bq76PL536 (3-6) of company, the MC33771 (6-of Freescale (Freescale) company
14) etc..
Summary of the invention
It is an aspect of this invention to provide that provide the voltage monitoring device of a kind of battery modules, for one or more electricity
Each monitoring voltage that carries out in M the battery unit being in charging and discharging circuit in the module of pond, wherein, M for more than or etc.
In the integer of 2;
Voltage monitoring device includes:
Monitoring voltage integrated circuit, its each respectively formation voltage acquisition being arranged to corresponding M described battery unit returns
Road also gathers the magnitude of voltage of each battery unit;
First current acquisition parts, it is for gathering the balanced discharge loop of each battery unit being in balanced discharge process
Electric current is as the first sample rate current;And
First compensating module, it is for being calculated the first voltage compensation based on described first sample rate current and the first resistance value
Value, wherein said first resistance value is balanced discharge loop and this battery unit institute of each battery unit of balanced discharge process
The resistance value of the multiplexing part of the voltage acquisition circuit of adjacent any battery unit, and/or for based on described first sampling
Electric current and the second resistance value are calculated the second voltage compensation value, and wherein said second resistance value is each of balanced discharge process
The resistance value of the multiplexing part of self corresponding voltage acquisition circuit of the balanced discharge loop of battery unit and this battery unit;
Wherein, described voltage monitoring device is configured to balanced discharge process based on described monitoring voltage integrated circuit acquisition
The magnitude of voltage of any battery unit that each battery unit is adjacent and the most described first compensates voltage calculating and is equalized
The monitoring voltage value of any battery unit that each battery unit of discharge process is adjacent, and/or be configured to based on described
The magnitude of voltage of each battery unit of the balanced discharge process of monitoring voltage integrated circuit acquisition and the most described second compensates
Voltage calculates the monitoring voltage value of each battery unit being equalized discharge process.
According to another aspect of the present invention, it is provided that a kind of monitoring voltage integrated circuit, for one or more battery moulds
Each monitoring voltage that carries out in M the battery unit being in charging and discharging circuit in group, wherein, M is more than or equal to 2
Integer;
Wherein, monitoring voltage integrated circuit, its each respectively formation voltage being arranged to corresponding M described battery unit is adopted
Collect loop and gather the magnitude of voltage of each battery unit;
Described monitoring voltage integrated circuit also includes:
First current acquisition parts, it is for gathering the balanced discharge loop of each battery unit being in balanced discharge process
Electric current is as the first sample rate current;And
First compensating module, it is for being calculated the first voltage compensation based on described first sample rate current and the first resistance value
Value, wherein said first resistance value is balanced discharge loop and this battery unit institute of each battery unit of balanced discharge process
The resistance value of the multiplexing part of the voltage acquisition circuit of adjacent any battery unit, and/or for based on described first sampling
Electric current and the second resistance value are calculated the second voltage compensation value, and wherein said second resistance value is each of balanced discharge process
The resistance value of the multiplexing part of self corresponding voltage acquisition circuit of the balanced discharge loop of battery unit and this battery unit;
Wherein, described monitoring voltage integrated circuit is configured to each battery unit institute based on its balanced discharge process gathered
The magnitude of voltage of adjacent any battery unit and the most described first compensates voltage calculating and is equalized each of discharge process
The monitoring voltage value of any battery unit that battery unit is adjacent, and/or it is configured to the balanced discharge mistake gathered based on it
The magnitude of voltage of each battery unit of journey and the most described second compensates voltage and calculates each electricity being equalized discharge process
The monitoring voltage value of pool unit.
Further aspect according to the present invention, it is provided that the voltage monitoring method of a kind of battery modules, for one or more
Each monitoring voltage that carries out in M the battery unit being in charging and discharging circuit in battery modules, wherein, M for more than or
Integer equal to 2;
Described voltage monitoring method includes step:
Each respectively the forming voltage acquisition circuit and gather the magnitude of voltage of each battery unit of corresponding M described battery unit;
Gather the electric current in balanced discharge loop of each battery unit being in balanced discharge process as described first sampling electricity
Stream;
It is calculated the first voltage compensation value, wherein said first resistance value based on described first sample rate current and the first resistance value
Any battery unit adjacent with this battery unit for the balanced discharge loop of each battery unit of balanced discharge process
The resistance value of the multiplexing part of voltage acquisition circuit;And
Any battery that each battery unit of balanced discharge process based on described monitoring voltage integrated circuit acquisition is adjacent
Each battery unit institute that the magnitude of voltage of unit and the most described first compensation voltage calculating are equalized discharge process is adjacent
The monitoring voltage value of any battery unit.
It is another aspect of this invention to provide that provide the voltage monitoring method of a kind of battery modules, for one or more
Each monitoring voltage that carries out in M the battery unit being in charging and discharging circuit in battery modules, wherein, M for more than or
Integer equal to 2;
Described voltage monitoring method includes step:
Each respectively the forming voltage acquisition circuit and gather the magnitude of voltage of each battery unit of corresponding M described battery unit;
Gather the electric current in balanced discharge loop of each battery unit being in balanced discharge process as described first sampling electricity
Stream;
It is calculated the second voltage compensation value, wherein said second resistance value based on described second sample rate current and the second resistance value
Self corresponding voltage acquisition circuit of balanced discharge loop and this battery unit for each battery unit of balanced discharge process
The resistance value of multiplexing part;And
The magnitude of voltage of each battery unit of balanced discharge process based on described monitoring voltage integrated circuit acquisition and at least
Described second compensates voltage calculates the monitoring voltage value of each battery unit being equalized discharge process.
Still further aspect according to the present invention, it is provided that a kind of vehicle, it includes energy storing device, described energy storage dress
Center multiple battery modules being connected in series and above-mentioned voltage monitoring device or above-mentioned monitoring voltage integrated circuit.
Features above and operation according to the following description and drawings present invention will become apparent from.
Accompanying drawing explanation
From combine accompanying drawing described further below, it will make the above and other purpose of the present invention and advantage more complete
Clear.
Fig. 1 is the structural representation of the voltage monitoring device of the battery modules according to one embodiment of the invention.
Fig. 2 is the voltage monitoring device voltage acquisition schematic diagram in balanced discharge process of embodiment illustrated in fig. 1.
Fig. 3 is the modular structure schematic diagram of the monitoring voltage integrated circuit of the battery modules according to one embodiment of the invention.
Fig. 4 is the structural representation of the voltage monitoring device of the battery modules according to further embodiment of this invention.
Fig. 5 is the voltage monitoring device of the embodiment illustrated in fig. 4 voltage acquisition schematic diagram when a balanced discharge situation.
Fig. 6 is the voltage monitoring device voltage acquisition schematic diagram in another balanced discharge situation of embodiment illustrated in fig. 4.
Fig. 7 is the schematic flow sheet of the voltage monitoring method of the battery modules according to one embodiment of the invention.
Fig. 8 is the structural representation of the vehicle according to one embodiment of the invention.
Detailed description of the invention
The present invention is more fully described, shown in the drawings of the exemplary embodiment of the present invention now with reference to accompanying drawing.
But, the present invention can realize according to the most different forms, and is not construed as being limited to embodiments set forth here.
On the contrary, it is provided that these embodiments make the disclosure become thorough and complete, and the design of the present invention is entirely delivered to this area
Technical staff.In accompanying drawing, identical label refers to identical element or parts, therefore, will omit description of them.
Some block diagrams shown in accompanying drawing are functional entitys, it is not necessary to must be with the most independent entity phase
Corresponding.Can use software form to realize these functional entitys, or in one or more hardware modules or integrated circuit
Realize these functional entitys, or in different processor device and/or microcontroller device, realize these functional entitys.
Fig. 1 show the structural representation of the voltage monitoring device of the battery modules according to one embodiment of the invention.At this
In embodiment, voltage monitoring device example is for the battery unit to two of which battery modules (i.e. battery modules 110 and 120)
Carry out monitoring voltage, it is to be understood that, the quantity of the battery modules that voltage monitoring device simultaneously monitors not is restrictive.Battery
Module 110 and battery modules 120 are all mainly made up of 12 battery units, 12 battery units by 6 strings 2 and in the way of arrange;
Such as, inside battery modules 110, battery unit 11011, battery unit 11012To battery unit 11016Connect with being sequentially connected in series
Form string battery unit, battery unit 11021, battery unit 11022To battery unit 11026Connect formation with being sequentially connected in series again
String battery unit, two row battery units in parallel define the battery modules 110 of the embodiment of the present invention together;Similarly, exist
Battery modules 120 is internal, battery unit 12011, battery unit 12012To battery unit 12016Connect formation one with being sequentially connected in series
Row battery unit, battery unit 12021, battery unit 12022To battery unit 12026Connect formation another row electricity with being sequentially connected in series
Pool unit, two row battery units in parallel define the battery modules 120 of the embodiment of the present invention together.To battery modules 110
Or the battery unit in 120 is when carrying out monitoring voltage, each battery unit of wherein any string battery unit is carried out voltage
Monitor, be equivalent to the battery unit that another row battery unit is corresponding carried out monitoring voltage the most simultaneously, namely equally supervised
Depending on, such as, to battery unit 11012The magnitude of voltage that sampling or detection obtain i.e. correspondence is equal to battery unit 11022Sampling or inspection
The magnitude of voltage recorded, battery unit 11022Equally monitored.In Fig. 1 and figure 3 below to the example shown in Fig. 6, battery
The battery unit of the dotted line line respective column in module represents the battery unit equally monitored, the realization in battery modules is even
The battery unit of line respective column is monitored practically, wherein, selects in multiple row battery unit arranged side by side which row by practical surveillance
It not restrictive.
It should be noted that in the cell array of battery modules in Fig. 1 and Fig. 3 to Fig. 6 of the present invention, for
The arrangement position in an array of each battery unit of convenient signal, the label XXX of battery unit in figureYZIn, XXX represents this electricity
The battery modules at pool unit place, the first figure place Y in subscript YZ represents this battery unit columns in this battery modules, under
The second figure place Z in mark YZ represents Z (or Z row) battery in the string of this battery unit series connection in this battery modules
Unit.Such as, battery unit 11021Represent that it is in battery modules 110, and be positioned at the electricity of the 1st (or the 1st row) of the 2nd row
Pool unit.
It should be noted that in each battery modules, the number of its included battery unit be not limited to above or
Below example, its concrete arrangement mode is not the embodiment being limited to above and below.Multiple in each battery modules
Can be identical between battery unit, such as, same model, identical running voltage etc., battery unit can be with monomer electricity
The form performance in pond.
The battery modules 110 and 120 being connected in series may be constructed battery bag, such as hybrid vehicle or electric automobile
Battery bag, it is to be understood that the number of the battery modules included by battery bag is not limited to illustrate embodiment.
Battery modules 110 and 120 can realize being connected in series by connector 210, and connector 210 can be such as to conflux
The conductors such as bar (Busbar) or wire harness, the battery unit of the two ends of connector 210 adjacent different battery modules respectively, i.e. battery list
Unit 11016With battery unit 12011.Owing to connector 210 is in the charging and discharging circuit of battery modules 110 and 120, discharge and recharge
Charge or discharge electric current I in loop1Through connector 210 and pressure drop can be produced.
Continue as it is shown in figure 1, voltage monitoring device also includes monitoring voltage integrated circuit 220, in this embodiment, one
Monitoring voltage integrated circuit 220 is not limited only to gather the magnitude of voltage of the battery unit being connected in series within a battery modules,
Such as, during monitoring voltage integrated circuit 220 gathers the charging and discharging circuit of 2 battery modules being connected in series 110 and 120 simultaneously
Each corresponding magnitude of voltage in 12 battery units being connected in series, for each battery unit, by monitoring voltage collection
Circuit 220 is become to be respectively formed corresponding voltage acquisition circuit.
Monitoring voltage integrated circuit 220 may be selected to be the LTC6804 (6-12) of Linear (LT) company, Texas Instrument (TI) public affairs
The chips such as the bq76PL455 (6-16) of department or the MC33771 (6-14) of Freescale (Freescale) company.The most chip-shaped
In number, the first bit digital in bracket represents the number of the minimum battery cell voltage simultaneously gathered of these chip needs, in bracket
Second-order digit represent the number of battery cell voltage that this chip is at best able to gather simultaneously, such as, for chip
LTC6804 (6-12), it at least needs 6 battery cell voltages of the most corresponding collection, i.e. needs at least to enter 6 battery units
Row monitoring voltage, it is at best able to 12 battery cell voltages of the most corresponding collection, i.e. 12 battery units can be carried out electricity
Pressure monitors.
Inventors noted that the voltage between 12 battery units there may be unbalanced situation, accordingly, it would be desirable to it
In some or multiple voltage carrying out discharging to realize between multiple battery unit basically reach equilibrium, this discharge process is i.e.
For balanced discharge;The process of balanced discharge can also have been controlled by monitoring voltage integrated circuit 220 and formed respective battery
The balanced discharge loop of unit;But, during the balanced discharge of a certain battery unit, monitoring voltage integrated circuit 220 is to this
When the adjacent cell of battery unit and this battery unit carries out voltage acquisition or detection, have that voltage acquisition is inaccurate asks
Topic.
To this end, in this embodiment, as it is shown in figure 1, voltage monitoring device is additionally provided with the first current sample parts 231 He
First compensating module 241 is to compensate part balanced discharge loop (line of especially sampling) in a certain cell balancing discharge process
The impact that the voltage acquisition of this battery unit and its adjacent battery unit is produced by the pressure drop produced.Wherein, the first electric current
Sample unit 231, its electric current in the balanced discharge loop gathering battery unit is as sample rate current, and this sample rate current leads to
Often at the 100mA order of magnitude, (it can reach hundreds of peace to the sample rate current collected compared to the second current sample parts 232
Training) the least.First compensating module 241 is coupled to current sample parts the first current sample parts 231, the first current sample portion
The sample rate current of part 231 sends to the first compensating module 241.First compensating module 241 is configured input balanced discharge loop
In relate to sampling line resistance value, according to this resistance value and sample rate current size, another compensation voltage can be calculated
(it is different from the compensation voltage V that the second compensating module 542 obtains1).
In one embodiment, as it is shown in figure 1, the first current sample parts 231 can be, but not limited to be arranged on monitoring voltage
In integrated circuit 220, the first compensating module 241 can be, but not limited to be arranged in battery management system 900, the first compensating module
241 specifically can be realized by Programmable Logic Controller etc..
Fig. 2 show the voltage monitoring device voltage acquisition schematic diagram in balanced discharge process of embodiment illustrated in fig. 1.Knot
Close shown in Fig. 1 and Fig. 2, with battery unit 120 that is collected or that monitor11Illustrate for example.
As illustrated in fig. 2, it is assumed that battery unit 12011Need balanced discharge, see Fig. 1, from battery unit 12011Positive pole
Sequentially pass through sampling line 221a, equalizing resistance R3(not shown in figure 1), sampling line 221b are to battery unit 12011Negative pole, from
And form balanced discharge loop;This balanced discharge loop is in fig. 2 with resistance R2, equalizing resistance R3With resistance R4The loop constituted
Signal, the electric current in balanced discharge loop is I2, it is such as at 100 milliamperes of orders of magnitude;Wherein, resistance R2Signal is from battery unit
12011Positive best equalizing resistance R3Between the resistance in balanced discharge loop, resistance R4Signal is from equalizing resistance R3To battery list
Unit 12011Negative pole between the resistance in balanced discharge loop.Present inventor notices, is especially using a voltage
Monitoring that integrated circuit carries out voltage acquisition or supervision to the battery unit of multiple battery modules, therefore, sampling line is inevitable
Be lengthened out to original tens times the most, therefore, the resistance of the sampling line in balanced discharge loop becomes relatively big and becomes
For the main impedance in balanced discharge loop, and the bigger electricity that can affect battery unit can be produced during balanced discharge
Pressure gathers the pressure drop of accuracy.Therefore, in one embodiment, resistance R2It is essentially equivalent to the resistance of sampling line 221a, resistance R4
Being essentially equivalent to the resistance of sampling line 221b, the resistance of the miscellaneous part in balanced discharge loop etc. all can be with relative sample line
Resistance is left in the basket and disregards.Above resistance R2With resistance R4Can obtain beforehand through methods such as measurements (such as, according to sampling line
Length can the most accurately be calculated resistance R2With resistance R4) and be input to the first compensating module 241, equalizing resistance R3Permissible
It is specifically located at the inside of monitoring voltage integrated circuit 220, it is also possible to be arranged on monitoring voltage integrated circuit 220 outside, such as
On outside collection terminal or pin.
When carrying out balanced discharge in mode shown in Fig. 2, it should be noted that balanced discharge loop will be with battery unit 12011
Voltage acquisition circuit fractional reuse, such as, resistance R2With resistance R4Corresponding balanced discharge loop feature is basic multiplexing,
Resistance R2With resistance R4At battery unit 12011Balanced discharge during the pressure drop that produces can by monitoring voltage integrated circuit 220
Corresponding collection terminal collect the magnitude of voltage V collected as corresponding battery unit 1201111’A part, therefore, this electricity
Pressure value V11’Can not truly reflect now battery unit 12011Voltage.
To this end, when balanced discharge, it is I that the first current sample parts 231 gather the electric current in balanced discharge loop2, first
Compensating module 241 obtains this electric current I from the first current sample parts 2312, and combine resistance R2With resistance R4, it is calculated compensation
Voltage, i.e. V11 compensate=(R2+R4) × I2.Voltage monitoring device is further according to magnitude of voltage V11’With compensation voltage V11 compensateCalculate V11,
It is specifically based on relationship below (1) to calculate:
V11= V11’-V11 compensate= V11’-(R2+R4) × I2(1).
So, with calculated magnitude of voltage V11As battery unit 12011Monitoring voltage value, it can accurately reflect electricity
Pool unit 12011Virtual voltage during balanced discharge, accordingly, it is capable to gather more accurately and effectively to battery unit from
Virtual voltage during balanced discharge.
When carrying out balanced discharge in mode shown in Fig. 2, should also be noted that battery unit 12011Balanced discharge loop
Will be with battery unit 12012Voltage acquisition circuit, battery unit 12016Voltage acquisition circuit there is also fractional reuse, the most just
It is to say, battery unit 12011Partial-equilibrium discharge loop be in battery unit 12012Voltage acquisition circuit on or be in
Battery unit 12016Voltage acquisition circuit on.
At battery unit 12011Balanced discharge during and battery unit 12012Voltage acquisition during, resistance R4Right
The balanced discharge loop feature answered is basic multiplexing, resistance R4At battery unit 12011Balanced discharge during produce pressure
Fall can be collected as corresponding battery unit 120 by the corresponding collection terminal of monitoring voltage integrated circuit 22012The voltage collected
Value V12’A part, therefore, this magnitude of voltage V12’Can not truly reflect now battery unit 33012Voltage.
To this end, at battery unit 12011During balanced discharge, the first current sample parts 231 gather the electricity in balanced discharge loop
Stream is I2, the first compensating module 241 obtains this electric current I from the first current sample parts 2312, and combine resistance R4, it is calculated
Compensate voltage, i.e. V12 compensate=R4×I2.Voltage monitoring device is further according to magnitude of voltage V12’With compensation voltage V12 compensateCalculate V12, tool
Body calculates based on relationship below (2):
V12= V12’-V12 compensate= V12’-R4×I2(2).
So, with calculated magnitude of voltage V12As battery unit 12012Monitoring voltage value, it can accurately reflect electricity
Pool unit 12012At adjacent battery unit 12011Virtual voltage during balanced discharge, accordingly, it is capable to more real
Now to battery unit 12012Virtual voltage during its adjacent battery unit is in balanced discharge.
Equally, at battery unit 12011Balanced discharge during and battery unit 12016The collection of voltage acquisition
Cheng Zhong, resistance R2Corresponding balanced discharge loop feature be basic multiplexing (although battery unit 12011With battery unit 12016
It is in different battery modules), resistance R2At battery unit 12011Balanced discharge during the pressure drop that produces can by voltage
Monitor that the corresponding collection terminal of integrated circuit 220 collects as corresponding battery unit 12016The magnitude of voltage V collected16’One
Part, this magnitude of voltage V16’Can not truly reflect now battery unit 12016Voltage.To this end, equalize at battery unit 12011
During electric discharge, it is I that the first current sample parts 231 gather the electric current in balanced discharge loop2(including its sense of current information), first
Compensating module 241 obtains this electric current I from the first current sample parts 2312, and combine resistance R2, it is calculated compensation voltage, i.e.
V16 compensate=R2×I2.Voltage monitoring device is further according to magnitude of voltage V16’With compensation voltage V16 compensateCalculate V16, it is specifically based on following
Relational expression (3) calculates:
V14= V14’+ V14 compensate= V12’+ R4×I2(3).
So, with calculated magnitude of voltage V16As battery unit 12016Monitoring voltage value, it can accurately reflect electricity
Pool unit 12016At adjacent battery unit 12011Virtual voltage during balanced discharge, accordingly, it is capable to more real
Now to battery unit 12016Virtual voltage during its adjacent battery unit is in balanced discharge.
It should be noted that at V12And V16Compensation calculation during, not do not consider the resistance R of connector 2101Cause
Pressure drop, this is owing to connector 210 is not in battery unit 12011With battery unit 11016Voltage acquisition circuit on.And
Even if connector 210 is simultaneously in battery unit 12011Balanced discharge loop and voltage acquisition circuit on, the electricity of connector 210
Resistance R1The resistance R that relative sample line 221a is mainly corresponding2Being relatively small, during balanced discharge, connector 210 is produced
Pressure drop the least, can not consider.But, for improving the accuracy of voltage acquisition, above V further11Compensation calculation
Process is it is further contemplated that the resistance R of connector 2101The pressure drop caused during balanced discharge.
Continue as it is shown in figure 1, inventor is it is further noted that if based on currently existing scheme, with a monitoring voltage collection
Become circuit 220(such as LTC6804 (6-12)) corresponding when monitoring battery modules 110 or 120, LTC6804 (6-12) is not
Have and sufficiently applied, and, the quantity required of LTC6804 (6-12) chip is also greatly increased.And inventor it is also noted that
Arriving, multiple battery modules assemblies need to introduce connector and realize being connected in series between them, meanwhile, at charge or discharge electric current
I1In the case of bigger, such as, can reach more than 500A, therefore, the connector 210 charge or discharge in charging and discharging circuit
During the pressure drop that produces can not ignore, the particularly distance between the battery modules 110 and 120 arranges longer (such as may be used
Can be more than 10 centimetres) etc. situation cause resistance value R of connector 2101Increase further.Connector 210 is owing to being simultaneously in
On the voltage acquisition circuit of its adjacent a certain battery unit, therefore its pressure drop produced easily is reflected in connector 210 liang
The a certain battery unit (110 that end is adjacent16Or 12011) voltage sample value in, therefore, the voltage sample of this battery unit can not
Accurately reflect the virtual voltage of battery unit, easily cause monitoring voltage inaccurate.
Using chip LTC6804 (6-12) as example with monitoring voltage integrated circuit 220, it is simultaneously to 12 battery units
(i.e. battery unit 11011To 11016With battery unit 12011To 12016) carry out voltage sample or detection, specifically, LTC6804
(6-12) 13 collection terminals or pin connect with connected mode as shown in Figure 1 respectively, and the most adjacent battery unit is indirectly
Enter a collection terminal or pin carries out voltage acquisition, can return by correspondence one voltage acquisition of composition between two collection terminals or pin
Road, the magnitude of voltage of the collected i.e. corresponding a certain battery unit of pressure reduction between two collection terminals or pin.
But, for the battery unit 120 of one end connection of connector 21011, due to the battery list in different battery modules
Unit 12011With battery unit 11016Between introduce connector 210, a collection terminal of LTC6804 (6-12) or pin are to connect
Enter at battery unit 11016With between connector 210, another collection terminal of LTC6804 (6-12) or pin are to access at battery
Unit 12011Negative pole one end, so, the adjacent collection terminal of two of which of LTC6804 (6-12) or pin are that corresponding bridging connects
Part 210 and battery unit 12011, thus define battery unit 12011Corresponding voltage acquisition circuit, connector 210 is in this
On voltage acquisition circuit, therefore, the magnitude of voltage V that the adjacent collection terminal of two above gathers0Reflection is battery unit 12011Electricity
Pressure and the connector 210 pressure drop sum in charge and discharge process, it can not truly reflect battery unit 12011Voltage.
To this end, in this embodiment, voltage monitoring device is additionally provided with the second current sample parts 232 and second and compensates mould
Block 242.Wherein, the second current sample parts 232 can gather the electric current of the charging and discharging circuit residing for connector 210 as sampling
Electric current, i.e. electric current I1, wherein electric current I1Direction be not limited to illustrate embodiment.In this embodiment, the second current sample parts
232 can be arranged in battery management system 900, for gathering the charging and discharging currents of battery bag in battery management system 900
Parts can be as the second current sample parts 232 of the embodiment of the present invention.In one embodiment, the second compensating module 242 is also
Can be arranged in battery management system 900, it specifically can be realized by Programmable Logic Controller etc., the second compensating module 242
It is coupled to the second current sample parts 232 and the sample rate current I that the second current sample parts 232 are gathered can be obtained1, second
Compensating module 242 is such as had resistance value R of connector 210 correspondence by programmably input1, sample rate current I1It is multiplied by resistance value R1
I.e. can obtain compensation voltage V1, it is i.e. corresponding to the connector 210 pressure drop in charge and discharge process.
What voltage monitoring device was based further on monitoring voltage integrated circuit 220 is connected across connector 210 and battery unit
12011The magnitude of voltage V that gathered of two adjacent collection terminals0The compensation voltage V obtained with the second compensating module 2421It is calculated electricity
Pressure value Va, in this embodiment, the sample rate current I of connector 2101Direction and voltage acquisition circuit residing for connector 210
Electric current (this electric current relative sample electric current I1For the least) direction is identical, therefore, calculates V by relationship below (4)a:
Va= V0-V1= V0-(I1×R1) (4).
Further, the battery unit 120 of above example is not being considered11Balanced discharge in the case of, monitoring voltage fill
Put this magnitude of voltage VaAs battery unit 12011Monitoring voltage value, this monitoring voltage value can accurately reflect this battery unit
12011At the virtual voltage of battery modules charge and discharge process, therefore, voltage monitoring device is to battery unit 12011Monitoring voltage
More accurate and effective.
Also need to consider the battery unit 120 of above example at the same time11Also in balanced discharge process to battery unit
12011Voltage acquisition impact in the case of, the first current sample parts 231 gather battery unit 12011Balanced discharge loop
Electric current I2, the second current sample parts 232 can gather the electric current of the charging and discharging circuit residing for connector 210 as sampling electricity
Stream I1, thus the first voltage compensation module 231 and the second voltage compensation module 232 obtain compensation voltage V respectively simultaneously11 compensateAnd benefit
Repay voltage V11.Voltage monitoring device is further according to magnitude of voltage V11’, compensate voltage V11 compensateWith compensation voltage V1Calculate V11, specifically
Calculate based on relationship below (5):
V11= V11’-V11 compensate-V1= V11’-(R2+R4) × I2-(I1×R1) (5).
So, with calculated magnitude of voltage V11As battery unit 11011Monitoring voltage value, it not only considers phase
Adjacent battery unit 33011The impact during being in balanced discharge, its voltage acquisition or supervision produced, and consider and filling
In discharge process, connector 210 on its voltage acquisition or monitors the impact produced.Therefore, magnitude of voltage V14Can be more real
Now to battery unit 32014Virtual voltage.
It should be noted that for battery unit 12011Outside other monitored battery units, their both positive and negative polarity
Two ends are all to be connected across on two collection terminals of monitoring voltage integrated circuit 220 or pin to form corresponding voltage acquisition circuit,
Being not introduced into connector 210 in voltage acquisition circuit, therefore, the corresponding magnitude of voltage gathered can accurately reflect respective battery reflection substantially
Voltage, it is not necessary to consider the impact that its voltage acquisition produced at battery charging and discharging of connector 210.
In other embodiments, a collection terminal or the pin of LTC6804 (6-12) is to access at battery unit 12011With
Between connector, another collection terminal of LTC6804 (6-12) or pin are to access at battery unit 11016Positive pole one end, this
Sample, the adjacent collection terminal of two of which of LTC6804 (6-12) or pin are corresponding bridging connector 210 and battery unit 11016,
Thus form battery unit 11016Voltage acquisition circuit.The electricity that the adjacent collection terminal of two of which of LTC6804 (6-12) gathers
The reflection of pressure value is battery unit 11016Voltage and the connector 210 pressure drop sum in charge and discharge process.By the most right
Battery unit 12011Similar processing mode, the most accurately obtain battery unit 11016Monitoring voltage value.
It is to be appreciated that in the embodiment above, monitoring voltage dress can be realized by configuring battery management system 900
The above calculating magnitude of voltage V put11、V12、V16And/or VaProcess complete in battery management system 900, it is also possible to by joining
Put monitoring voltage integrated circuit 220 and realize the above calculating magnitude of voltage V of voltage monitoring device11、V12、V16And/or VaProcess exist
Monitoring voltage integrated circuit 220 completes, it is also possible to there is the first compensating module 241/ second compensating module of calculation function
The above calculating magnitude of voltage V of voltage monitoring device is realized in 24211、V12And V16/ magnitude of voltage VaProcess, even can also set up
It is independently arranged corresponding calculation processing apparatus to realize the above calculating magnitude of voltage V of voltage monitoring device11、V12、V16And/or Va
Process.
In the voltage monitoring device of the battery modules of above example, a monitoring voltage integrated circuit 220 can be same
Time such as two battery modules are carried out voltage sample, and, effectively prevent because balanced discharge, connector 210 etc. cause
The inaccurate problem of voltage sample, therefore, it can reduce monitoring voltage integrated circuit 220 usage quantity, such as, if one
Battery bag includes 50 battery modules as shown in Figure 1, and voltage monitoring device can only use 25 integrated electricity of monitoring voltage
Road 220, the usage quantity of monitoring voltage integrated circuit 220 reduces half, greatly reduces the cost of voltage monitoring device.
It should be noted that the monitoring voltage integrated circuit 220 of the embodiment of the present invention is not limited to carry out battery unit
Voltage sample, such as, can also sample to other parameters (such as battery cell temperature).
It is not limited to also, it should be noted the voltage compensation of the monitoring voltage value of above balanced discharge process calculates process
The feelings of the magnitude of voltage of the battery unit being connected in series within multiple battery modules are gathered at a monitoring voltage integrated circuit 220
Apply under shape, such as, gather the battery list being connected in series within a battery modules at a monitoring voltage integrated circuit 220
Can also apply, such as, based on the principle correspondence calculating one that relation above formula (1) and (2) are corresponding when the magnitude of voltage of unit
The monitoring voltage value of the battery unit within individual battery modules.
Fig. 3 show the modular structure signal of the monitoring voltage integrated circuit of the battery modules according to one embodiment of the invention
Figure.In this embodiment, the function of the voltage monitoring device of figure 1 above embodiment is not all the most integrated at monitoring voltage
Completing in circuit 220, the monitoring voltage integrated circuit 220 of the embodiment of the present invention is used not only for gathering 2 batteries being connected in series
Each corresponding magnitude of voltage in be connected in series 12 battery units in the charging and discharging circuit of module 110 and 120, and
And, it is also configured with the first compensating module 241 and the second compensating module 242 therein.In monitoring voltage integrated circuit 220
One compensating module 241 can obtain the balanced discharge electric current of each battery unit that the first current sample parts 231 are gathered, the
One compensating module 241 can also be had all resistance values R as shown in Figure 2 by programmably input2And R4Deng, therefore, based on above figure
1 and Fig. 2 illustrates, and equally obtains the compensation voltage V of above example11 compensate、V12 compensate、V16 compensateDeng;The integrated electricity of monitoring voltage
The second compensating module 242 in road 220 can obtain the sample rate current I that current sample parts 230 are gathered1, second compensates mould
Block 242 can also be had resistance value R of connector 210 correspondence by programmably input1, sample rate current I1It is multiplied by resistance value R1?
With the same compensation voltage V obtaining figure 1 above example1, it is i.e. corresponding to the connector 210 pressure drop in charge and discharge process.?
In one embodiment, monitoring voltage integrated circuit 220 is designed to Programmable Logic Controller, and it can programmably have by input sample line
Resistance value that body is corresponding, concrete corresponding resistance value R of connector 2101。
In another alternative embodiment, even the second current sample parts 232 can also be arranged on monitoring voltage integrated
In circuit 220, namely monitoring voltage integrated circuit 220 has simultaneously and the charging and discharging circuit residing for battery modules is carried out electric current adopts
The function of sample.
The monitoring voltage integrated circuit 220 of embodiment illustrated in fig. 3 is equally configured to based on co-relation formula (1) extremely
(5) mode is calculated monitoring voltage value to accurately reflect the virtual voltage of respective battery unit, and it considers inside simultaneously
Answering of the voltage acquisition circuit of cell balancing discharge process balanced discharge loop and this battery unit or adjacent cell
With the pressure drop of connector 210 impact on voltage acquisition in pressure drop partly and/or battery modules charge and discharge process.Further, also
Can realize based on a monitoring voltage integrated circuit 220, multiple battery modules (such as two battery modules 110 and 120) being entered
Row voltage acquisition and supervision, advantageously reduce cost.
The specific works principle of the monitoring voltage integrated circuit 220 of embodiment illustrated in fig. 3 and the voltage of embodiment illustrated in fig. 1
The operation principle of monitoring arrangement is essentially identical or similar, and this is no longer going to repeat them.It is to be understood that in example further below
In the voltage monitoring device of voltage monitoring device or other embodiments, it can also be based on the above electricity to embodiment illustrated in fig. 1
Pressure monitoring arrangement conversion forms the mode of monitoring voltage integrated circuit 220, and the corresponding monitoring voltage of conversion formation is integrated similarly
Circuit (IC).
Fig. 4 show the structural representation of the voltage monitoring device of the battery modules according to further embodiment of this invention.?
In this embodiment, voltage monitoring device example is for the electricity to wherein three battery modules (i.e. battery modules 310,320 and 330)
Pool unit carries out monitoring voltage, it is to be understood that, the quantity of the battery modules that voltage monitoring device simultaneously monitors not is restricted
's.Battery modules 310, battery modules 320 and battery modules 330 are all mainly made up of 12 battery units, 12 battery units
By 4 string 3 and in the way of arrange;Such as, inside battery modules 310, battery unit 31011, battery unit 31012To battery list
Unit 31014Connect formation string battery unit, battery unit 310 with being sequentially connected in series21, battery unit 31022To battery unit 31024
Connect the another row battery unit of formation, battery unit 310 with being sequentially connected in series31, battery unit 31032To battery unit 31034Successively
Being connected in series formation and go back string battery unit, three row battery units in parallel define the battery mould of the embodiment of the present invention together
Group 310;Battery modules 320 is identical with battery modules 310 with the arrangement mode of the battery unit within battery modules 330.Right
When battery unit in battery modules 310 or 320 or 330 carries out monitoring voltage, each to wherein any string battery unit
Battery unit carries out monitoring voltage, is equivalent to the battery unit that another row battery unit is corresponding carried out voltage prison the most simultaneously
Depending on, namely equally monitored, such as, to battery unit 31012The magnitude of voltage that sampling obtains i.e. correspondence is equal to battery unit
31022Or battery unit 31032The magnitude of voltage that sampling obtains, battery unit 31022With battery unit 31032Equally monitored.
Similarly, battery modules 310 and 320, battery modules 330 and 330 can realize series connection by connector 210 respectively
Connecting, connector 210 can be such as the conductors such as busbar (Busbar) or wire harness, and the two ends of connector 210 adjoin not respectively
With the battery unit of battery modules, such as, battery unit 31014With battery unit 32011, battery unit 32014And battery unit
33011.Owing to connector 210 is in the charging and discharging circuit of battery modules 310,320 and 320, charging in charging and discharging circuit or
Discharge current I1Through connector 210 and pressure drop can be produced.Similarly, connector 210 is owing to being simultaneously in its certain adjoined
One battery unit (such as 31014、32014) voltage acquisition circuit on, therefore, connector 210 produce pressure drop be easily reflected in
The a certain battery unit (such as 310 adjacent to connector 210 two ends14、32014) voltage sample in, therefore, this battery unit
Voltage sample can not accurately reflect the virtual voltage of battery unit, easily cause monitoring voltage inaccurate.
Continuing as shown in Figure 4, voltage monitoring device also includes monitoring voltage integrated circuit 420, in this embodiment, voltage
Monitor that integrated circuit 420 may be selected to be the LTC6804 (6-12) of Linear (LT) company, Texas Instrument (TI) company
The chips such as the MC33771 (6-14) of bq76PL455 (6-16) or Freescale (Freescale) company.In this embodiment, one
Individual monitoring voltage integrated circuit 420 is not limited only to gather the magnitude of voltage of the battery unit being connected in series in a battery modules,
Such as, monitoring voltage integrated circuit 420 gathers the charging and discharging circuit of 3 battery modules being connected in series 310,320 and 330 simultaneously
In be connected in series 12 battery units in each corresponding magnitude of voltage.Core is used with monitoring voltage integrated circuit 420
Sheet LTC6804 (6-12) is example, its have can the simultaneously corresponding ability gathering 12 battery cell voltages, therefore can be right
12 battery units (i.e. battery unit 310 of three modules11To 31014, battery unit 32011To 32014And battery unit
33011To 33014) carry out voltage sample or detection simultaneously.Specifically, 13 collection terminals or the pin of LTC6804 (6-12) is distinguished
Connect with connected mode as shown in Figure 4, access a collection terminal between the most adjacent battery unit or pin carries out voltage and adopts
Collection, correspondence can constitute a voltage acquisition circuit, the pressure between two collection terminals or pin between two collection terminals or pin
Difference i.e. can gather out the magnitude of voltage of this battery unit.
In this embodiment, voltage monitoring device is arranged monitoring units circuit (Cell Monitoring Circuit,
CMC) socket 451 and some element circuits extension (Cell Circuit Extension, CCE) socket 452, wherein, voltage is supervised
It is inserted on CMC socket 451 depending on integrated circuit 420, can external sampling line or sampling wire harness connection on CMC socket 451
Corresponding position to battery modules 320 as shown in Figure 4, thus, the part collection terminal of monitoring voltage integrated circuit 420 or
Pin can be coupled indirectly to the two ends of respective battery unit by CMC socket 451 and exterior strands, carries out forming this electricity
The voltage acquisition circuit of pool unit;Not putting monitoring voltage integrated circuit 420 on CCE socket 452, it can external sampling line
Or sampling wire harness is connected to the corresponding position in battery modules 310 or 330 as shown in Figure 4, and CCE socket 452 and CMC
Connected by such as connector between socket 451, thus, the signal that the sampling line of CCE socket 452 is gathered can pass sequentially through
CCE socket 452, CMC socket 451 transmit the appropriate section collection terminal to monitoring voltage integrated circuit 420 or pin, equally
Form voltage acquisition circuit.
CCE socket 452 position based on the corresponding battery modules that they connect respectively with the placement location of CMC socket 451
Determine, wherein, if monitoring voltage integrated circuit 420 gathers the voltage of three or more than three battery modules being connected in series
Value, CMC socket 451 correspondence is placed in the side of the battery modules being in middle position in three or more than three battery modules, CCE
Socket 452 correspondence is placed in the side of other battery modules, such as, outside the corresponding battery modules (320) connected of CMC socket 451
Each battery modules (310 or 330) be arranged in correspondence with a CCE socket 452, so, be conducive to shortening sampling line and (such as adopt
Line-transect 421b, 421c and 421d) length and be conducive to sample line arrangement in good order.The particular number of CCE socket 452
Not being restrictive, it can come really according to the quantity of the corresponding detection of monitoring voltage integrated circuit 420 or the battery modules gathered
Fixed.
Continue as shown in Figure 4, due to the introducing of connector 210, the problem equally existing figure 1 above illustrated embodiment, also
That is, the battery unit such as battery unit 310 that connector 210 one end is adjacent14, due to the battery list in different battery modules
Unit 32011With battery unit 31014Between introduce connector 210, with monitoring voltage integrated circuit 420 as LTC6804 (6-12)
For example, collection terminal of LTC6804 (6-12) is to access (such as being accessed) by CMC socket 451 and sampling line at battery list
Unit 32011And between connector 210, another collection terminal of LTC6804 (6-12) be access (such as by CMC socket 451,
CCE socket 452 and sampling line access) at battery unit 31014Positive pole one end, so, the two of which of LTC6804 (6-12)
Adjacent collection terminal or pin are corresponding bridging connector 210 and battery unit 31014, they are used for forming battery unit 31014's
Voltage acquisition circuit, the magnitude of voltage V of collection0Reflection is battery unit 31014Voltage and connector 210 at charge and discharge process
In pressure drop sum, it can not truly reflect battery unit 31014Voltage.For battery unit 32014It is to exist to be similar to
Situation.
To this end, in this embodiment, voltage monitoring device also sets up the second current sample parts 432 and the second compensating module
442.Wherein, the second current sample parts 432 can gather the electric current of the charging and discharging circuit residing for connector 210 as sampling electricity
Stream, i.e. electric current I1, in this embodiment, the second current sample parts 432 can be arranged in battery management system 900, battery
In management system 900, the parts for the charging and discharging currents that gathers battery bag can be adopted as the second electric current of the embodiment of the present invention
Sample parts 432.In one embodiment, the second compensating module 442 can also be arranged in battery management system 900, and it specifically may be used
To be realized by Programmable Logic Controller etc., what the second compensating module 442 can obtain that the second current sample parts 432 are gathered adopts
Sample electric current I1, compensating module 240 is such as had resistance value R of connector 210 correspondence by programmably input1, sample rate current I1It is multiplied by
Resistance value R1I.e. can obtain compensation voltage V1, it is i.e. corresponding to the connector 210 pressure drop in charge and discharge process.
What voltage monitoring device was based further on monitoring voltage integrated circuit 420 is connected across connector 410 and battery unit
31014(or battery unit 32014) the magnitude of voltage V that gathered of two adjacent collection terminals0The compensation obtained with the second compensating module 442
Voltage V1It is calculated magnitude of voltage V14, such as calculate based on relationship below (6):
V14= V0-V1= V0-(I1×R1) (6).
Do not considering battery unit 31014(or battery unit 32014) and the situation of balanced discharge of its adjacent cell
Under, voltage monitoring device can be further by magnitude of voltage V14As battery unit 31014(or battery unit 32014) voltage prison
Apparent value, this monitoring voltage value more can accurately reflect this battery unit 31014(or battery unit 32014) virtual voltage.
It is to be appreciated that the above calculating electricity of voltage monitoring device can be realized by configuring battery management system 900
Pressure value V14Process completes in battery management system 900, it is also possible to realize voltage prison by configuring monitoring voltage integrated circuit 420
The above calculating magnitude of voltage V of view apparatus14Process completes in monitoring voltage integrated circuit 420, it is also possible to have calculation function
The second compensating module 442 realize the above calculating magnitude of voltage V of voltage monitoring device14Process, even can also set up and independently set
Put corresponding calculation processing apparatus to realize the above calculating magnitude of voltage V of voltage monitoring device14Process.
In the voltage monitoring device of the battery modules of figure 4 above illustrated embodiment, a monitoring voltage integrated circuit 420
Such as three battery modules can be carried out voltage sample simultaneously, and, effectively prevent the voltage caused because of connector 210 and adopt
The inaccurate problem of sample, therefore, it can the usage quantity of monitoring voltage integrated circuit 420 is reduced to original 1/3rd,
While greatly reducing the cost of voltage monitoring device, the accuracy of monitoring voltage does not declines.
Continue as shown in Figure 4, voltage monitoring device to be additionally provided with the first current sample parts 431 and the first compensating module
441.The first current sample parts 431 electric current in the balanced discharge loop gathering battery unit, should as sample rate current
Sample rate current is generally at the 100mA order of magnitude, and (it is permissible for the sample rate current collected compared to the second current sample parts 432
Reach hundreds of ampere) the least.This sample rate current sends to the first compensating module 441.First compensating module 441 is configured input
Have in balanced discharge loop relate to sampling line resistance value, according to this resistance value and sample rate current size, can calculate
To another compensation voltage, (it is different from the compensation voltage V that the second compensating module 442 obtains1).
In this embodiment, the first current sample parts 431 are set and the first compensating module 441 is to compensate for a certain electricity
The pressure drop that during pool unit balanced discharge, partial-equilibrium discharge loop (line of especially sampling) produces to this battery unit and
The impact that the voltage acquisition of its adjacent battery unit produces.
Fig. 5 show the voltage monitoring device of the embodiment illustrated in fig. 4 voltage acquisition principle when a balanced discharge situation
Figure, Fig. 6 show the voltage monitoring device voltage acquisition schematic diagram in another balanced discharge situation of embodiment illustrated in fig. 4.With
Lower combination Fig. 4 to Fig. 6 carries out detailed example explanation to the operation principle of the voltage monitoring device of the embodiment of the present invention.
In a kind of balanced discharge situation, as shown in fig. 5, it is assumed that with battery unit 33011Needing balanced discharge is example,
See Fig. 4, from battery unit 33011Positive pole sequentially pass through sampling line 421b and CCE socket 452, equalizing resistance R6(in Fig. 4 not
Illustrate), CCE socket 452 and sampling line 421c to battery unit 33011Negative pole, thus form balanced discharge loop;This equilibrium
Discharge loop is main with resistance R in Figure 55, equalizing resistance R6With resistance R7Signal, the electric current in balanced discharge loop is I4, its example
As at 100 milliamperes of orders of magnitude;Wherein, resistance R5Signal is from battery unit 33011Positive best equalizing resistance R6Between equilibrium put
The equivalent resistance in electricity loop, resistance R7Illustrate from equalizing resistance R6 to battery unit 33011Negative pole between balanced discharge loop
Equivalent resistance.Present inventor notices, right owing to current embodiment require that one monitoring voltage integrated circuit of employing comes
The battery unit of multiple battery modules carries out voltage acquisition or supervision, and therefore, sampling line is inevitably lengthened out to original
Tens times the most;Therefore, the resistance of the sampling line in balanced discharge loop becomes relatively big and becomes balanced discharge loop
Main impedance, and the pressure of the bigger voltage acquisition accuracy that can affect battery unit can be produced during balanced discharge
Fall.Therefore, in one embodiment, resistance R5It is essentially equivalent to the resistance of sampling line 421b, resistance R7It is essentially equivalent to sampling
The resistance of line 421c, the CCE socket 452 in balanced discharge loop and be arranged on patching between CCE socket 452 and CMC socket 451
The resistance of part etc. all can be left in the basket with the resistance of relative sample line and disregard.Above resistance R5With resistance R7Can be beforehand through measurement
(such as, resistance R can be the most accurately calculated according to the length of sampling line etc. method acquisition5With resistance R7) and be input to
One compensating module 441, equalizing resistance R6The inside of monitoring voltage integrated circuit 420 can be specifically located at, it is also possible to be arranged on
Monitoring voltage integrated circuit 420 is outside, on such as CMC socket 451.
When carrying out balanced discharge in the manner illustrated in fig. 5, it should be noted that balanced discharge loop will be with battery unit 33011
Voltage acquisition circuit fractional reuse, such as, resistance R5With resistance R7Corresponding balanced discharge loop feature is basic multiplexing,
Resistance R5With resistance R7At battery unit 33011Balanced discharge during the pressure drop that produces can by monitoring voltage integrated circuit 420
Corresponding collection terminal collect as corresponding battery unit 33011The magnitude of voltage V collected11’A part, therefore, this voltage
Value V11’Can not truly reflect now battery unit 33011Voltage.
To this end, when balanced discharge, it is I that the first current sample parts 431 gather the electric current in balanced discharge loop4, first
Compensating module 441 obtains this electric current I from the first current sample parts 4314, and combine resistance R5With resistance R7, it is calculated compensation
Voltage, i.e. V11 compensate=(R5+R7) × I4.Voltage monitoring device is further according to magnitude of voltage V11’With compensation voltage V11 compensateCalculate V11,
It is specifically based on relationship below (7) to calculate:
V11= V11’-V11 compensate= V11’-(R5+R7) × I4(7).
So, with calculated magnitude of voltage V11As battery unit 33011Monitoring voltage value, it can accurately reflect electricity
Pool unit 33011Virtual voltage during balanced discharge, accordingly, it is capable to gather more accurately and effectively to battery unit from
Virtual voltage during balanced discharge.
When carrying out balanced discharge in the manner illustrated in fig. 5, should also be noted that battery unit 33011Balanced discharge loop
Will be with battery unit 33012Voltage acquisition circuit, battery unit 32014Voltage acquisition circuit there is also fractional reuse, the most just
It is to say, battery unit 33011Partial-equilibrium discharge loop be in battery unit 33012Voltage acquisition circuit on or be in
Battery unit 32014Voltage acquisition circuit on
At battery unit 33011Balanced discharge during and battery unit 33012Voltage acquisition gatherer process in, resistance
R7Corresponding balanced discharge loop feature is basic multiplexing, resistance R7At battery unit 33011Balanced discharge during produce
Pressure drop can be collected as corresponding battery unit 330 by the corresponding collection terminal of monitoring voltage integrated circuit 42012Collected
Magnitude of voltage V12’A part, therefore, this magnitude of voltage V12’Can not truly reflect now battery unit 33012Voltage.
To this end, at battery unit 33011During balanced discharge, the first current sample parts 431 gather the electricity in balanced discharge loop
Stream is I4, the first compensating module 441 obtains this electric current I from the first current sample parts 4314, and combine resistance R7, it is calculated
Compensate voltage, i.e. V12 compensate=R7×I4.Voltage monitoring device is further according to magnitude of voltage V12’With compensation voltage V12 compensateCalculate V12, tool
Body calculates based on relationship below (8):
V12= V12’-V12 compensate= V12’-R7×I4(8).
So, with calculated magnitude of voltage V12As battery unit 33012Monitoring voltage value, it can accurately reflect electricity
Pool unit 33012At adjacent battery unit 33011Virtual voltage during balanced discharge, accordingly, it is capable to more real
Now to battery unit 33012Virtual voltage during its adjacent battery unit is in balanced discharge.
Equally, at battery unit 33011Balanced discharge during and battery unit 32014The collection of voltage acquisition
Cheng Zhong, resistance R5Corresponding balanced discharge loop feature be basic multiplexing (although battery unit 33011With battery unit 32014
It is in different battery modules), resistance R5At battery unit 33011Balanced discharge during the pressure drop that produces can by voltage
Monitor that the corresponding collection terminal of integrated circuit 420 collects as corresponding battery unit 32014The magnitude of voltage V collected14’One
Part, this magnitude of voltage V14’Can not truly reflect now battery unit 32014Voltage.To this end, at battery unit 33011Equilibrium
During electric discharge, it is I that the first current sample parts 431 gather the electric current in balanced discharge loop4(including its sense of current information), first
Compensating module 441 obtains this electric current I from the first current sample parts 4314, and combine resistance R5, it is calculated compensation voltage, i.e.
V14 compensate=R5×I4.Voltage monitoring device is further according to magnitude of voltage V14’With compensation voltage V14 compensateCalculate V14, it is specifically based on following
Relational expression (9) calculates:
V14= V14’+ V14 compensate= V14’+ R5×I4(9).
So, with calculated magnitude of voltage V14As battery unit 32014Monitoring voltage value, it can accurately reflect electricity
Pool unit 32014At adjacent battery unit 33011Virtual voltage during balanced discharge, accordingly, it is capable to more real
Now to battery unit 32014Virtual voltage during its adjacent battery unit is in balanced discharge.
It should be noted that at V11And V14Compensation calculation during, not do not consider the resistance R of connector 2101Cause
Pressure drop, this is owing to connector 210 is not in battery unit 33011Balanced discharge loop on;Further, though connector 210
It is in battery unit 33011On balanced discharge loop, the resistance R of connector 2101The resistance that relative sample line 421b is mainly corresponding
R5 is relatively small, is not considering charging current I from charging and discharging circuit1In the case of the pressure drop caused, balanced discharge mistake
Cheng Zhong, pressure drop produced by connector 210 is the least, can not consider in this embodiment.But, if connector 210
It is in battery unit 33011On balanced discharge loop and by relevant voltage acquisition circuit multiplexing, for improving voltage acquisition further
Accuracy, above V11And V14Compensation calculation process need to consider further the resistance R of connector 2101In balanced discharge process
In the pressure drop that causes.
Further, if also needing to consider the charging and discharging currents I of charging and discharging circuit1The pressure drop that the connector 210 caused produces
In the case of, in addition it is also necessary to consider the compensation voltage V that the second voltage compensation module 442 obtains1= (I1×R1), that is, voltage
Monitoring arrangement is further according to magnitude of voltage V14’, compensate voltage V14 compensateWith compensation voltage V1Calculate V14, it is specifically based on relationship below
(10) calculate:
V14= V14’+ V14 compensate-V1= V14’+ R5×I4-(I1×R1) (10).
So, with calculated magnitude of voltage V14As battery unit 32014Monitoring voltage value, it not only considers phase
Adjacent battery unit 33011The impact during being in balanced discharge, its voltage acquisition or supervision produced, and consider and filling
In discharge process, connector 210 on its voltage acquisition or monitors the impact produced.Therefore, magnitude of voltage V14Can be more real
Now to battery unit 32014Virtual voltage.
Figure 5 above example illustrate one be connected in series in the battery unit of multiple battery modules when balanced discharge such as
What is the need remove the impact of the voltage acquisition of the battery unit on this balanced discharge and how to eliminate the battery unit of this balanced discharge
Impact on the voltage acquisition of adjacent battery unit.
In another balanced discharge situation, as shown in Figure 6, it is assumed that with battery unit 33011With battery unit 33012Need
Wanting balanced discharge is example, wherein, and battery unit 33011Balanced discharge loop same as shown in Figure 5;Similarly, battery unit
33012Composition and the battery unit 330 in balanced discharge loop11Composition substantially similar, its be mainly by resistance R7, equilibrium electricity
Resistance R8With resistance R9The loop of composition, wherein, resistance R7It it is battery unit 33011Balanced discharge loop and battery unit 33012
The part that shared of balanced discharge loop, namely the part of multiplexing, resistance R9Signal is from equalizing resistance R8To battery unit
33012Negative pole between the resistance in balanced discharge loop, resistance R9It is essentially equivalent to the resistance of sampling line 421d, Ye Jijun
The weighing apparatus CCE socket 452 of discharge loop and the resistance etc. of connector being arranged between CCE socket 452 and CMC socket 451
It is left in the basket with the resistance of relative sample line and disregards.Similarly, above resistance R9Can obtain and quilt beforehand through methods such as measurements
Input to the first compensating module 441, equalizing resistance R8The inside of monitoring voltage integrated circuit 420 can be specifically located at, it is possible to
Outside to be arranged on monitoring voltage integrated circuit 420.
When carrying out balanced discharge in mode shown in Fig. 6, it should be noted that battery unit 33011Balanced discharge loop will
With battery unit 3302The part of balanced discharge loop multiplexing, i.e. resistance R7Corresponding part, it is also and battery unit
33011Voltage acquisition circuit fractional reuse, or with battery unit 33012Voltage acquisition circuit fractional reuse.Cause
This, voltage monitoring device calculate battery unit 33011Or battery unit 33012Monitoring voltage value time, not only need consider
The pressure drop in the balanced discharge loop impact on voltage acquisition during self balanced discharge, in addition it is also necessary to consider adjacent battery unit
It is in the pressure drop of the partial-equilibrium discharge loop impact on voltage acquisition during balanced discharge.Now, the first current sample portion
Part 431 gathers battery unit 33011The electric current I in balanced discharge loop4, and gather battery unit 330 simultaneously12Equilibrium put
The electric current I in electricity loop5, the first compensating module 441 obtains this electric current I from the first current sample parts 4314And I5.Further, based on
Known resistance R5With resistance R7, for battery unit 33011, it is calculated compensation voltage, i.e. V11 compensate=(R5+R7) × I4-R7
×I5;Voltage monitoring device is further according to magnitude of voltage V11’With compensation voltage V11 compensateCalculate V11, it is specifically based on relationship below
(11) calculate:
V11= V11’-V11 compensate= V11’-(R5+R7) × I4 + R7×I5(11).
Similarly, based on known resistance R9With resistance R7, for battery unit 33012, it is calculated compensation voltage, i.e.
V12 compensate=(R9+R7) × I5-R7×I4.Voltage monitoring device is further according to the magnitude of voltage V collected12’With the first compensating module
The 441 compensation voltage V obtained12 compensateCalculate V12, it is specifically based on relationship below (12) and calculates:
V12= V12’-V12 compensate= V12’-(R9+R7) × I5 + R7×I4(12).
By above magnitude of voltage V11And V12Respectively as battery unit 330 under this balanced discharge situation11And battery unit
33012Monitoring voltage value, it will be more accurate.
Balanced discharge situation shown in figure 6 above is actually the extension of balanced discharge situation shown in Fig. 5, that takes into account two
Influencing each other in the case of adjacent battery unit balanced discharge at the same time.
It should be noted that the calculating compensating voltage of various embodiments above and/or the voltage as monitoring voltage value
During the calculating of value, " adding " or " subtracting " is the sense of current according to voltage acquisition circuit and the sense of current in charging and discharging circuit
Relation or determine with the relation of the sense of current on balanced discharge loop.
Based on figure 1 above to embodiment illustrated in fig. 4, it is to be understood that the voltage monitoring device of embodiments of the invention or electricity
Pressure monitors that integrated circuit can realize the monitoring voltage of the multiple battery modules being connected in series of other any arrangement modes or adopt
Collection, such as, battery unit is with 3 string 4 battery modules that arrange;According to the battery unit being connected in series in each battery modules
Quantity and monitoring voltage integrated circuit be at best able to the quantity of the simultaneously corresponding battery cell voltage gathered, can be concrete
Determine the quantity of the battery modules of the collection of each monitoring voltage integrated circuit correspondence or supervision.
Voltage monitoring device below in conjunction with embodiment illustrated in fig. 4 illustrates the monitoring voltage side of the embodiment of the present invention
Method.
Fig. 7 show the schematic flow sheet of the voltage monitoring method of the battery modules according to one embodiment of the invention.In conjunction with
Figure 4 above illustrates its procedure to Fig. 7.
First, step S710, monitoring voltage integrated circuit acquisition magnitude of voltage.Wherein, monitoring voltage integrated circuit 420 gathers
The each monitored battery unit being in charging and discharging circuit of multiple battery modules (310,320 and 330) being connected in series
Magnitude of voltage, be connected across each connector 210 and the adjacent battery unit (such as 310 of connector 210 including gathering14Or
32014) two collection terminals between magnitude of voltage, such as, the magnitude of voltage V of figure 4 above illustrated embodiment0。
Step S721, the second current acquisition parts 432 gather the electric current I of charging and discharging circuit1As the second sample rate current.Enter
One step, step S722, the second compensating module 442 is calculated each battery unit (such as 310 affected by connector 21014Or
32014) corresponding the second compensation voltage.The compensation voltage V of this calculating process such as figure 4 above illustrated embodiment1Calculating process phase
With, i.e. V1= I1×R1, wherein, R1For the resistance of connector 210, I1Sample rate current for charging and discharging circuit.
Simultaneously, step S731, the first current acquisition parts 431 gather the electricity in the balanced discharge loop of each battery unit
Flow as corresponding first sample rate current, this gatherer process and figure 5 above and the collection balanced discharge loop of embodiment illustrated in fig. 6
Electric current I4And I5Process identical.Further, step S732, first compensating module 441 is calculated and is affected by balanced discharge
The first compensation voltage that each battery unit is corresponding, the calculating process of this first compensation voltage and V in Fig. 5 and Fig. 6 example11 compensate、
V12 compensateOr V14 compensateCalculating process identical, whether can be affected by self balanced discharge according to this battery unit and/or whether be subject to
The impact of adjacent cell balanced discharge determines the calculation of the second compensation voltage.
Further, step S740, compensate voltage and correspondence according to the first compensation voltage and/or second of each battery unit
The magnitude of voltage that each battery unit gathers, is calculated the corresponding magnitude of voltage voltage monitoring value as this battery unit.This meter
Calculation process is V in above and Fig. 5 and Fig. 6 example11、V12Or V14Calculating process identical, be not described in detail in this.Need explanation
It is if battery unit is only affected by connector 210, then to calculate voltage according to figure 4 above illustrated embodiment based on relational expression (6)
Value V14Method obtain its voltage monitoring value;If battery unit is only affected by self balanced discharge, then according to figure 5 above institute
Show that embodiment calculates magnitude of voltage V based on relational expression (7)11Method obtain its voltage monitoring value;If battery unit is only by phase
The balanced discharge impact of adjacent battery unit, then calculate magnitude of voltage according to figure 5 above illustrated embodiment based on relational expression (8)/(9)
V12/V14Method obtain its voltage monitoring value;If battery unit is both affected also by adjacent cell list by self balanced discharge
Unit's balanced discharge impact, then calculate magnitude of voltage V according to figure 6 above illustrated embodiment based on relational expression (11)/(12)11/V12Side
Method obtains its voltage monitoring value;If battery unit is both affected also by adjacent cell balanced discharge shadow by connector 210
Ring, then calculate magnitude of voltage V according to figure 5 above illustrated embodiment based on relational expression (10)14Method obtain its voltage monitoring value;
Certainly, the most do not affected by any cell balancing electric discharge if neither affected by connector 210, then the electricity gathered based on correspondence
Pressure value is as voltage monitoring value.
It should be noted that owing to the length of sampling line corresponding to different battery units is probably different, therefore, be in
The resistance of the sampling line on balanced discharge loop is also probably different.The battery list that connect corresponding for CMC socket 451
Unit, owing to its sampling line may be relatively short, its produced pressure drop during balanced discharge is probably voltage acquisition precision
In the range of being allowed, battery unit (the such as battery unit 320 that connect corresponding for CMC socket 45111, battery unit
32012, battery unit 32013), it is possible to selectively using correspondence gather magnitude of voltage as voltage monitoring value.
Fig. 8 show the structural representation of the vehicle according to one embodiment of the invention.In this embodiment, vehicle 80 is dynamic
Force system 800 at least uses motor 840 to provide driving force, dynamical system 800 also to include energy storing device 810, and energy stores
Device 810 is provided with the battery bag that multiple battery modules being connected in series is formed, and also figure 1 above or Fig. 4 institute are set
Show the voltage monitoring device of embodiment, or also set up the monitoring voltage integrated circuit of figure 3 above illustrated embodiment, monitoring voltage
Device or monitoring voltage integrated circuit are carried out in each battery unit being in charging and discharging circuit in multiple battery modules
Monitoring voltage.Dynamical system 800 also includes electric machine control system 820, the sensor 850 of motor 840 one end setting, wagon control
Module 830.The electric power of energy storing device 810 output is controlled by electric machine control system 820 and/or vehicle control module 830
On-demand, stably output offer to motor 840 is provided, controls from realizing the driving to vehicle.
The vehicle of embodiment illustrated in fig. 8 is specifically as follows electric vehicle or motor vehicle driven by mixed power it should be appreciated that arrive, with
The energy storing device 810 used in figure 8 above illustrated embodiment can be widely applied to can be used in promoting having of vehicle
Any dynamical system of one or more motors.The example of motor vehicle driven by mixed power can include but not limited to plug-in hybrid
Vehicle, double mode motor vehicle driven by mixed power, full motor vehicle driven by mixed power, extended-range motor vehicle driven by mixed power, power-assisted hybrid electric vehicle
, light hybrid vehicle, serial mixed power vehicle, parallel hybrid vehicles, series-parallel hybrid power
Vehicle, fluid power motor vehicle driven by mixed power, power dividing type motor vehicle driven by mixed power and the motor vehicle driven by mixed power of any other type.This
Vehicle in Gong Kai can be configured to car, motor type car, truck, bus, commercial car, transboundary car, recreation vehicle etc., should
When being understood by, the technology of the disclosure is not limited to a certain certain types of vehicle.
It will be appreciated that be taken in it is said parts " are connected ", " coupling " or " access " arrive another parts time, it can be direct
Connect or couple or be linked into another parts, it is also possible to there is the intermediate member in addition to described connector 210.
Example above primarily illustrates the voltage monitoring device of the battery modules of the present invention, monitoring voltage integrated circuit, electricity
Press supervision method and use voltage monitoring device or the vehicle of monitoring voltage integrated circuit of the present invention.Although only to wherein
Some embodiments of the present invention are described, but those of ordinary skill in the art are not it is to be appreciated that the present invention can be
Deviateing in its spirit and scope and implement with other forms many, such as, each voltage monitoring integrated circuit is gathered or is monitored
The change of battery modules quantity.Therefore, the example shown and embodiment are considered illustrative and not restrictive,
In the case of spirit and scope of the present invention as defined in appended claims, the present invention may contain various repairing
Change and replace.
Claims (20)
1. a voltage monitoring device for battery modules, for being in charging and discharging circuit in one or more battery modules
M battery unit in each monitoring voltage that carries out, wherein, M is the integer more than or equal to 2;
Voltage monitoring device includes:
Monitoring voltage integrated circuit, its each respectively formation voltage acquisition being arranged to corresponding M described battery unit returns
Road also gathers the magnitude of voltage of each battery unit;
First current acquisition parts, it is for gathering the balanced discharge loop of each battery unit being in balanced discharge process
Electric current is as the first sample rate current;And
First compensating module, it is for being calculated the first voltage compensation based on described first sample rate current and the first resistance value
Value, wherein said first resistance value is balanced discharge loop and this battery unit institute of each battery unit of balanced discharge process
The resistance value of the multiplexing part of the voltage acquisition circuit of adjacent any battery unit, and/or for based on described first sampling
Electric current and the second resistance value are calculated the second voltage compensation value, and wherein said second resistance value is each of balanced discharge process
The resistance value of the multiplexing part of self corresponding voltage acquisition circuit of the balanced discharge loop of battery unit and this battery unit;
Wherein, described voltage monitoring device is configured to balanced discharge process based on described monitoring voltage integrated circuit acquisition
The magnitude of voltage of any battery unit that each battery unit is adjacent and the most described first compensates voltage calculating and is equalized
The monitoring voltage value of any battery unit that each battery unit of discharge process is adjacent, and/or be configured to based on described
The magnitude of voltage of each battery unit of the balanced discharge process of monitoring voltage integrated circuit acquisition and the most described second compensates
Voltage calculates the monitoring voltage value of each battery unit being equalized discharge process.
2. voltage monitoring device as claimed in claim 1, wherein, the first resistance value/the second resistance value of described multiplexing part
Substantially the resistance value of the sampling line of described balanced discharge loop and correspondence described voltage acquisition circuit multiplexing, this sampling line it are equivalent to
Connect described monitoring voltage integrated circuit and described battery modules.
3. voltage monitoring device as claimed in claim 2, wherein, the resistance value of described sampling line is according to the sampling line of multiplexing
Length computation determines and is input to described first compensating module.
4. voltage monitoring device as claimed in claim 1, wherein, described first current acquisition parts and/or first compensate mould
Block is configured in battery management system.
5. voltage monitoring device as claimed in claim 1, wherein, described first current acquisition parts and/or first compensate mould
Block is configured in described monitoring voltage integrated circuit.
6. voltage monitoring device as claimed in claim 1, wherein, described M battery unit is the most N number of being connected in series not
With the battery unit being in charging and discharging circuit in battery modules, wherein N is the integer more than or equal to 2, and M is more than N's
Integer.
7. voltage monitoring device as claimed in claim 6, wherein, battery modules described in adjacent i-th and (i+1) individual institute
State and between battery modules, be provided with the connector with the 3rd resistance value, wherein, 1≤i≤(N-1);
Monitoring voltage integrated circuit, it is also configured with the first collection terminal and the second collection terminal, described first collection terminal and second
Collection terminal bridges each described connector arbitrary described battery unit adjacent with the two ends of this connector to form this battery list
The voltage acquisition circuit of unit;And
Second compensating module, it is for based on the first sample rate current in the described charging and discharging circuit acquired and described connection
3rd resistance value of part is calculated the 3rd compensation voltage;
Wherein, described voltage monitoring device is additionally configured to described first collection based on described monitoring voltage integrated circuit acquisition
Hold the magnitude of voltage between the second collection terminal and the most described 3rd to compensate voltage and be calculated described first collection terminal and the
The monitoring voltage value of the battery unit of two collection terminal correspondence bridgings.
8. voltage monitoring device as claimed in claim 7, wherein, also includes: the second current acquisition parts, and it is used for gathering institute
State the electric current of charging and discharging circuit as described second sample rate current.
9. voltage monitoring device as claimed in claim 8, wherein, described second current acquisition parts and/or second compensate mould
Block is configured in battery management system.
10. voltage monitoring device as claimed in claim 8, wherein, described second current acquisition parts and/or second compensate mould
Block is configured in described monitoring voltage integrated circuit.
11. voltage monitoring devices as claimed in claim 7, wherein, also include for putting described monitoring voltage integrated circuit
Monitoring units circuit socket and be connected to one or more element circuit extension sockets of described monitoring units circuit socket.
12. voltage monitoring devices as claimed in claim 11, wherein, described monitoring units circuit socket is 1, described unit
Circuit extension socket is that (N-1) is individual, 1 described monitoring voltage integrated circuit and (N-1) individual described element circuit extension socket by
One corresponding N number of battery modules being connected in series is arranged, 1 described monitoring voltage integrated circuit is disposed in the position of opposite central
Put.
The voltage monitoring method of 13. 1 kinds of battery modules, for being in charging and discharging circuit in one or more battery modules
In M battery unit in each monitoring voltage that carries out, wherein, M is the integer more than or equal to 2;
Described voltage monitoring method includes step:
Each respectively the forming voltage acquisition circuit and gather the magnitude of voltage of each battery unit of corresponding M described battery unit;
Gather the electric current in balanced discharge loop of each battery unit being in balanced discharge process as described first sampling electricity
Stream;
It is calculated the first voltage compensation value, wherein said first resistance value based on described first sample rate current and the first resistance value
Any battery unit adjacent with this battery unit for the balanced discharge loop of each battery unit of balanced discharge process
The resistance value of the multiplexing part of voltage acquisition circuit;And
Any battery that each battery unit of balanced discharge process based on described monitoring voltage integrated circuit acquisition is adjacent
Each battery unit institute that the magnitude of voltage of unit and the most described first compensation voltage calculating are equalized discharge process is adjacent
The monitoring voltage value of any battery unit.
14. voltage monitoring methods as claimed in claim 13, wherein, described M battery unit is the most N number of being connected in series
The battery unit being in charging and discharging circuit in different battery modules, wherein N is the integer more than or equal to 2, and M is more than N
Integer.
15. voltage monitoring methods as claimed in claim 14, wherein, described in adjacent i-th, battery modules and (i+1) are individual
The connector with the 3rd resistance value, wherein, 1≤i≤(N-1) it is provided with between described battery modules;
Described voltage monitoring method further comprises the steps of:
Described monitoring voltage integrated circuit at least gathers adjacent the appointing in two ends being connected across each described connector and this connector
Magnitude of voltage between first collection terminal and second collection terminal of battery unit described in;
The second sample rate current in the described charging and discharging circuit acquired;
It is calculated the 3rd compensation voltage based on described first sample rate current and described first resistance value;And
Magnitude of voltage between described first collection terminal based on described monitoring voltage integrated circuit acquisition and the second collection terminal and institute
State the monitoring voltage that the 3rd compensation voltage is calculated the battery unit of described first collection terminal and the bridging of the second collection terminal correspondence
Value.
The voltage monitoring method of 16. 1 kinds of battery modules, for being in charging and discharging circuit in one or more battery modules
In M battery unit in each monitoring voltage that carries out, wherein, M is the integer more than or equal to 2;
Described voltage monitoring method includes step:
Each respectively the forming voltage acquisition circuit and gather the magnitude of voltage of each battery unit of corresponding M described battery unit;
Gather the electric current in balanced discharge loop of each battery unit being in balanced discharge process as described first sampling electricity
Stream;
It is calculated the second voltage compensation value, wherein said second resistance value based on described second sample rate current and the second resistance value
Self corresponding voltage acquisition circuit of balanced discharge loop and this battery unit for each battery unit of balanced discharge process
The resistance value of multiplexing part;And
The magnitude of voltage of each battery unit of balanced discharge process based on described monitoring voltage integrated circuit acquisition and at least
Described second compensates voltage calculates the monitoring voltage value of each battery unit being equalized discharge process.
17. voltage monitoring methods as claimed in claim 16, wherein, described M battery unit is the most N number of being connected in series
The battery unit being in charging and discharging circuit in different battery modules, wherein N is the integer more than or equal to 2, and M is more than N
Integer.
18. voltage monitoring methods as claimed in claim 17, wherein, described in adjacent i-th, battery modules and (i+1) are individual
The connector with the 3rd resistance value, wherein, 1≤i≤(N-1) it is provided with between described battery modules;
Described voltage monitoring method further comprises the steps of:
Described monitoring voltage integrated circuit at least gathers adjacent the appointing in two ends being connected across each described connector and this connector
Magnitude of voltage between first collection terminal and second collection terminal of battery unit described in;
The second sample rate current in the described charging and discharging circuit acquired;
It is calculated the 3rd compensation voltage based on described first sample rate current and described first resistance value;And
Magnitude of voltage between described first collection terminal based on described monitoring voltage integrated circuit acquisition and the second collection terminal and institute
State the monitoring voltage that the 3rd compensation voltage is calculated the battery unit of described first collection terminal and the bridging of the second collection terminal correspondence
Value.
19. 1 kinds of vehicles, it includes energy storing device, is provided with multiple battery being connected in series in described energy storing device
Module and the voltage monitoring device as according to any one of claim 1 to 12.
20. vehicles as claimed in claim 19, wherein, described vehicle is electric vehicle or motor vehicle driven by mixed power.
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