CN105620291B - Detect method, unit and the battery management system of cell voltage - Google Patents
Detect method, unit and the battery management system of cell voltage Download PDFInfo
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- CN105620291B CN105620291B CN201510998770.4A CN201510998770A CN105620291B CN 105620291 B CN105620291 B CN 105620291B CN 201510998770 A CN201510998770 A CN 201510998770A CN 105620291 B CN105620291 B CN 105620291B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of method, unit and battery management system for detecting cell voltage.Wherein, this method includes：Set first voltage to sample wire harness in the first end of the electric component for connect the first battery and the second battery, set second voltage to sample wire harness at the second end of electric component；Wire harness is sampled by first voltage and tertiary voltage samples the voltage of wire harness the first battery of collection, wherein, tertiary voltage sampling wire harness is arranged far from one end of the first battery of the first end of electric component；Wire harness is sampled by second voltage and the 4th voltage sample wire harness gathers the voltage of the second battery, wherein, the 4th voltage sample wire harness is arranged far from one end of second battery at the second end of electric component.The present invention solves the relatively low technical problem of ratio of precision for gathering battery cell voltage in the prior art.
Description
Technical field
The present invention relates to field of batteries, in particular to a kind of method, unit and electricity for detecting cell voltage
Pond management system.
Background technology
Electric automobile is travelled using vehicle power as power with power wheel.Electric automobile has that environmental pollution is small, makes an uproar
The advantages that sound is small, energy utilization rate is high, there is good development prospect.
Batteries of electric automobile group at this stage is passed through by batteries up to a hundred more to be in series, to meet vehicle to voltage and appearance
The requirement of amount, the state of each battery are related to the performance of whole group battery, so must be carried out to the state of each battery real
When monitor.
The battery management system of electric automobile has monitoring battery status, optimization in real time using the energy content of battery, extends battery
Life-span and the important function such as safe to use for ensureing battery.Safe operation of the battery management system to vehicle, integrated vehicle control tactics
Selection, charge mode selection and operation cost all have a great impact.
Inventor has found, in the prior art when detecting battery cell voltage, due to being forbidden for detection battery cell voltage
Really cause battery management system low to the accuracy of detection of battery cell voltage, cause the control management effect of battery management system not
It is good.
For it is above-mentioned the problem of, not yet propose effective solution at present.
The content of the invention
The embodiments of the invention provide a kind of method, unit and battery management system for detecting cell voltage, so that
Solves the relatively low technical problem of the ratio of precision of collection battery cell voltage in the prior art less.
One side according to embodiments of the present invention, there is provided a kind of method for detecting cell voltage, including：For going here and there
The first end for joining the electric component of the first battery and the second battery sets first voltage to sample wire harness, the of the electric component
Two ends set second voltage to sample wire harness；Wire harness and tertiary voltage are sampled by the first voltage sample wire harness and gather described the
The voltage of one battery, wherein, tertiary voltage sampling wire harness is arranged far from described the of the first end of the electric component
One end of one battery；Wire harness is sampled by the second voltage and the 4th voltage sample wire harness gathers the electricity of second battery
Pressure, wherein, the 4th voltage sample wire harness is arranged far from the one of second battery at the second end of the electric component
End.
Further, first voltage is set to adopt in the first end for connect the first battery and the electric component of the second battery
Line-transect beam, before second voltage sampling wire harness is set at the second end of the electric component, methods described also includes：Detect and be used for
Connect first battery and second battery the electric component equivalent resistance resistance；Judge the equivalent resistance
Resistance whether be more than or equal to preset resistive value；It is more than or equal in the resistance for judging the equivalent resistance described default
In the case of resistance, it is determined that the first end in the electric component sets the first voltage sampling wire harness, at described electric group
Second end of part sets the second voltage sampling wire harness.
Further, first voltage is set to adopt in the first end for connect the first battery and the electric component of the second battery
Line-transect beam, setting second voltage to sample wire harness at the second end of the electric component includes：Detect whether in the electric component
First end be provided with first voltage sampling wire harness, or second electricity is provided with the second end of the electric component
Pressure sampling wire harness；If the first end of the electric component is provided with the first voltage sampling wire harness, in the electric component
The second end second voltage sampling wire harness is set；If the second end of the electric component is provided with the second voltage sampling
Wire harness, then the first voltage sampling wire harness is set in the first end of the electric component.
Further, first voltage is set to adopt in the first end for connect the first battery and the electric component of the second battery
Line-transect beam, setting second voltage to sample wire harness at the second end of the electric component includes：Detect whether in the electric component
Predeterminated position be provided with the 5th voltage sample wire harness；If the predeterminated position of the electric component is provided with the 5th voltage
Wire harness is sampled, then removes the 5th voltage sample wire harness, and the second voltage is set at the second end of the electric component
Wire harness is sampled, and the first voltage sampling wire harness is set in the first end of the electric component.
Another aspect according to embodiments of the present invention, a kind of equipment for detecting cell voltage is additionally provided, including：First electricity
Pond and the second battery, first battery and second battery are connected by electric component；Battery voltage acquisition device, at least sets
First voltage sampling wire harness, second voltage sampling wire harness, tertiary voltage sampling wire harness and the 4th voltage sample wire harness are equipped with, its
In, the first end of the first voltage sampling wire harness is connected with the battery voltage acquisition device, and the first voltage samples line
Second end of beam is connected with the first end of the electric component, the first end of the second voltage sampling wire harness and the battery
Voltage collector is connected, and the second end of the second voltage sampling wire harness is connected with the second end of the electric component, its
In, the battery voltage acquisition device samples wire harness by the first voltage and tertiary voltage samples wire harness and gathers first electricity
The voltage in pond, wherein, the tertiary voltage sampling wire harness is arranged far from first electricity of the first end of the electric component
The one end in pond；The battery voltage acquisition device is sampled described in wire harness and the collection of the 4th voltage sample wire harness by the second voltage
The voltage of second battery, wherein, the 4th voltage sample wire harness is arranged far from the described of the second end of the electric component
One end of second battery.
Another aspect according to embodiments of the present invention, additionally provides a kind of battery management system, the battery management system bag
The equipment for including above-mentioned detection cell voltage.
Another aspect according to embodiments of the present invention, a kind of device for detecting cell voltage is additionally provided, including：Set single
Member, for setting first voltage to sample wire harness in the first end of the electric component for connect the first battery and the second battery,
Second end of the electric component sets second voltage to sample wire harness；First collecting unit, for being adopted by the first voltage
Line-transect beam and tertiary voltage sampling wire harness gather the voltage of first battery, wherein, the tertiary voltage sampling wire harness is set
In one end of first battery of the first end away from the electric component；Second collecting unit, for passing through described second
Voltage sample wire harness and the 4th voltage sample wire harness gather the voltage of second battery, wherein, the 4th voltage sample line
Beam is arranged far from one end of second battery at the second end of the electric component.
Further, described device also includes：Detection unit, in the setting unit for the first battery of connecting
Set first voltage to sample wire harness with the first end of the electric component of the second battery, the is set at the second end of the electric component
Before two voltage sample wire harness, detect for the equivalent of connect first battery and the electric component of second battery
The resistance of resistance；Judging unit, for judging whether the resistance of the equivalent resistance is more than or equal to preset resistive value；It is it is determined that single
Member, when the resistance for judging the equivalent resistance when the judging unit is more than or equal to the preset resistive value, it is determined that
The first voltage sampling wire harness is set in the first end of the electric component, described in the setting of the second end of the electric component
Second voltage samples wire harness.
Further, the setting unit includes：First detection sub-unit, for detecting whether in the electric component
First end is provided with the first voltage sampling wire harness, or the second end of the electric component is provided with the second voltage
Sample wire harness；First sets subelement, for detecting that the first end of the electric component is set when first detection sub-unit
When being equipped with the first voltage sampling wire harness, the second voltage sampling wire harness is set at the second end of the electric component；The
Two set subelement, for detecting that the second end of the electric component is provided with described second when first detection sub-unit
During voltage sample wire harness, the first voltage sampling wire harness is set in the first end of the electric component.
Further, the setting unit includes：Second detection sub-unit, for detecting whether in the electric component
Predeterminated position is provided with the 5th voltage sample wire harness；3rd sets subelement, for being detected when second detection sub-unit
When the predeterminated position of the electric component is provided with the 5th voltage sample wire harness, the 5th voltage sample wire harness is removed,
And the second voltage sampling wire harness is set at the second end of the electric component, and set in the first end of the electric component
Put the first voltage sampling wire harness.
In embodiments of the present invention, in the first end setting the of the electric component for connect the first battery and the second battery
One voltage sample wire harness, second voltage is set to sample wire harness at the second end of electric component；By first voltage sample wire harness and
Tertiary voltage sampling wire harness gathers the voltage of the first battery, wherein, tertiary voltage sampling wire harness is arranged far from electric component
One end of first battery of first end；Wire harness is sampled by second voltage and the 4th voltage sample wire harness gathers the electricity of the second battery
Pressure, wherein, the 4th voltage sample wire harness is arranged far from one end of second battery at the second end of electric component.By electric
The both ends of component set voltage sample wire harness, gather the voltage of battery cell voltage and electric component respectively so that collect
Battery cell voltage in do not include electric component partial pressure, eliminate in the battery cell voltage of collection by electric component institute band
The partial pressure come, it is achieved thereby that improving the technique effect of the precision of detection battery cell voltage, and then solve in the prior art
Gather the relatively low technical problem of the ratio of precision of battery cell voltage.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of battery management system according to embodiments of the present invention；
Fig. 2 is the flow chart of the method for detection cell voltage according to embodiments of the present invention；And
Fig. 3 is the schematic diagram of the device of detection cell voltage according to embodiments of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
According to embodiments of the present invention, there is provided it is a kind of detect cell voltage method embodiment, it is necessary to explanation,
The step of flow of accompanying drawing illustrates can perform in the computer system of such as one group computer executable instructions, also,
, in some cases, can be with different from shown in order execution herein although showing logical order in flow charts
The step of going out or describing.
According to embodiments of the present invention, there is provided a kind of embodiment of battery management system.
Fig. 1 is the schematic diagram of battery management system according to embodiments of the present invention.As shown in figure 1, battery management system bag
Include battery cell voltage acquisition unit and voltage sample wire harness.Specifically, two neighboring battery is connected by electric component, in electricity
The first end of pneumatic module sets first voltage to sample wire harness, sets second voltage to sample wire harness, profit at the second end of electric component
With first voltage sample wire harness and tertiary voltage sampling wire harness gather the first battery voltage, using second voltage sample wire harness and
4th voltage sample wire harness gathers the voltage of the second battery, and wire harness and second voltage sampling wire harness collection are sampled using first voltage
Voltage for the electric component of connect the first battery and the second battery.Voltage sample wire harness is battery cell voltage acquisition unit
There is provided, after battery cell voltage acquisition unit collects the voltage of battery cell, battery is extracted from the voltage collected
The voltage of monomer, while ignore the voltage of electric component, the voltage using battery cell of the battery management system to collecting enters
Row is handled in next step, for example, battery balanced.
According to embodiments of the present invention, a kind of embodiment for the method for detecting cell voltage is additionally provided.
Fig. 2 is the flow chart of the method for detection cell voltage according to embodiments of the present invention.As shown in Fig. 2 this method bag
Include following steps：
Step S102, first voltage is set to adopt in the first end for connect the first battery and the electric component of the second battery
Line-transect beam, second voltage is set to sample wire harness at the second end of electric component.
Step S104, wire harness is sampled by first voltage and tertiary voltage samples the voltage of wire harness the first battery of collection, its
In, tertiary voltage sampling wire harness is arranged far from one end of the first battery of the first end of electric component.
Step S106, wire harness is sampled by second voltage and the 4th voltage sample wire harness gathers the voltage of the second battery, its
In, the 4th voltage sample wire harness is arranged far from one end of second battery at the second end of electric component.
For prior art when gathering the voltage of battery cell, the voltage U of the battery cell of collection includes two parts, one
Part is the virtual voltage Vc of battery cell, and another part is the partial pressure for connecting the electric component between two battery cells
VR。
When battery cell is in discharge condition (working condition), U=Vc-VR, therefore the voltage U of the battery cell gathered is small
In the virtual voltage Vc of battery cell.And when battery cell is in charged state, U=Vc+VR, therefore the battery cell gathered
Voltage U is more than the virtual voltage Vc of battery cell.
Generally, the electric component between battery is the electric component such as dynamic wire harness or cupro-nickel row.Due to point of electric component
Press VRWith the resistance of electric component and flowing through the current related of electric component, when the timing of electric current one for flowing through electric component, electrically
The resistance of component is bigger, the partial pressure V of electric componentRIt is bigger, that is to say, that the resistance of electric component is bigger, ignores electric group
Partial pressure V caused by partRAnd the error for gathering battery cell voltage is also bigger.And in the present embodiment, due to the electricity of collection first
The voltage of the voltage in pond and the second battery, in the absence of the partial pressure V of electric componentR, therefore, the battery cell of the actual acquisition of acquisition
Voltage U=Vc.
By the present embodiment, voltage sample wire harness is set at the both ends of electric component, gather respectively battery cell voltage and
The voltage of electric component so that do not include the partial pressure of electric component in the battery cell voltage collected, eliminate collection
In battery cell voltage as caused by electric component partial pressure, it is achieved thereby that improve detection battery cell voltage precision skill
Art effect, and then solve the relatively low technical problem of ratio of precision for gathering battery cell voltage in the prior art.
Alternatively, first voltage is set to sample in the first end of the electric component for connect the first battery and the second battery
Wire harness, set at the second end of electric component before second voltage samples wire harness, detection battery that the embodiment of the present invention is provided
The method of voltage also includes：Detect the resistance of the equivalent resistance of the electric component for connect the first battery and the second battery；Sentence
Whether the resistance of disconnected equivalent resistance is more than or equal to preset resistive value；It is more than or equal in the resistance for judging equivalent resistance pre-
In the case of handicapping value, it is determined that the first end in electric component sets first voltage to sample wire harness, at the second end of electric component
Second voltage is set to sample wire harness.
Because the collection resource of battery cell voltage acquisition unit is limited, if the electricity to all series-connected cell monomers
Pneumatic module all sets extra voltage sample wire harness, can increase the consumption of the resource of battery cell voltage acquisition unit.Meanwhile
When the equivalent resistance of electric component between battery cell is smaller, the partial pressure of electric component is also smaller, in the partial pressure of electric component
It is small to when can ignore, only the resistance of equivalent resistance can be more than or equal to preset resistive value electric component set it is extra
Voltage sample wire harness.
The resistance of the equivalent resistance of electric component can be calculated according to the law of resistance, i.e., by the length of electric component,
The resistivity of the material of cross-sectional area and electric component substitutes into the law of resistance, be calculated the resistance of equivalent resistance.Electrically
The resistance of the equivalent resistance of component can also be drawn by apparatus measures such as universal meters.Preset resistive value can be carried out according to actual conditions
Set, for example, being arranged to 20 milliohms.
For example, in general, the equivalent resistance of the electric component for two battery bags of connecting is bigger, can be to series connection two
The electric component of battery bag sets extra voltage sample wire harness, the two neighboring battery cell connected in same battery bag
The equivalent resistance of electric component is smaller, can not be to electric group of the two neighboring battery cell connected in same battery bag
Part sets extra voltage sample wire harness.
Extra voltage sample is set by the electric component for being more than or equal to preset resistive value to the resistance of equivalent resistance
Wire harness, the resource of battery cell voltage acquisition unit rationally can be efficiently utilized, and improve detection battery cell voltage
Precision.
Alternatively, first voltage is set to sample in the first end of the electric component for connect the first battery and the second battery
Wire harness, setting second voltage to sample wire harness at the second end of electric component includes：Detect whether that the first end in electric component is set
First voltage sampling wire harness is equipped with, or second voltage sampling wire harness is provided with the second end of electric component；If electric component
First end be provided with first voltage sampling wire harness, then electric component the second end set second voltage sample wire harness；It is if electric
Second end of pneumatic module is provided with second voltage sampling wire harness, then sets first voltage to sample line in the first end of electric component
Beam.
Voltage sample wire harness is provided between two adjacent battery cells, it is assumed that two battery cells are respectively battery list
Body C1 and battery cell C2, voltage sample wire harness L1 is provided between battery cell C1 and battery cell C2.Assuming that voltage sample
Wire harness L1 is closer to the distance with battery cell C1's, and distant with battery cell C2, then battery cell C1 and voltage sample
The equivalent resistance of electric component between wire harness L1 is smaller, the electric component between battery cell C2 and voltage sample wire harness L1
Equivalent resistance is larger, can so cause the voltage for detecting battery cell C1 more accurate, and detects battery cell C2 voltage ratio
It is more inaccurate.According to embodiments of the present invention, voltage sample wire harness L2 is set between battery cell C2 and voltage sample wire harness L1,
It is electric between battery cell C2 and voltage sample wire harness L2 and battery cell C2 and voltage sample wire harness L2 distance are very short
The equivalent resistance of component is smaller, so goes to gather battery cell C2's using voltage sample wire harness L2 rather than voltage sample wire harness L1
Voltage, the error of the voltage for the detection battery cell C2 that the partial pressure of electric component is brought can be effectively reduced, improves accuracy of detection.
By the embodiment of the present invention, detect between two adjacent battery cells existing voltage sample beam distance which
Individual battery cell is closer, the distant battery cell of existing voltage sample wire harness between two battery cells of that distance
Close to the side of another battery cell, new voltage sample wire harness is set, two adjacent battery cells can be effectively reduced
Between electric component partial pressure bring detection battery cell voltage error, improve detection battery cell voltage precision.
Alternatively, first voltage is set to sample in the first end of the electric component for connect the first battery and the second battery
Wire harness, setting second voltage to sample wire harness at the second end of electric component includes：Detect whether the predeterminated position in electric component
It is provided with the 5th voltage sample wire harness；If being provided with the 5th voltage sample wire harness in the predeterminated position of electric component, is removed
Five voltage sample wire harness, and set second voltage to sample wire harness, and first in electric component at the second end of electric component
End sets first voltage to sample wire harness.
The predeterminated position of electric component can be the position of the center section of electric component.If the first battery and the second electricity
Existing voltage sample wire harness is arranged on the position of the center section of the electric component of the first battery of series connection and the second battery between pond
Put, due to certain distance between the voltage sample wire harness between the first battery and existing two batteries be present, therefore the first battery
The resistance of electric component between the voltage sample wire harness be can not ignore, therefore the partial pressure of electric component causes to the first battery
The detection of voltage is inaccurate, and similarly, the partial pressure of the electric component between the second battery and the voltage sample wire harness causes to second
The detection of the voltage of battery is inaccurate, and the first battery of collection and the voltage of the second battery have relatively large deviation with actual value.
According to embodiments of the present invention, existing voltage sample wire harness between the first battery and the second battery is removed, and in electricity
The both ends of pneumatic module respectively set a voltage sample wire harness, remove to gather the first battery and the using newly-installed voltage sample wire harness
The voltage of two batteries, the resistance of electric component between two batteries is efficiently avoid to detecting the shadow of battery cell voltage
Ring, so as to improve the accuracy of detection battery cell voltage.
According to embodiments of the present invention, a kind of equipment for detecting cell voltage is additionally provided, the equipment is adopted including cell voltage
Battery cell voltage acquisition unit in storage, i.e. Fig. 1, the equipment of the detection cell voltage are used to detect the first battery and second
The voltage of battery, the first battery and the second battery are connected by electric component.
Battery voltage acquisition device, sample wire harness at least provided with first voltage, second voltage samples wire harness, tertiary voltage is adopted
Line-transect beam and the 4th voltage sample wire harness, wherein, the first end of first voltage sampling wire harness is connected with battery voltage acquisition device,
Second end of first voltage sampling wire harness is connected with the first end of electric component, the first end and electricity of second voltage sampling wire harness
Cell voltage collector is connected, and the second end of second voltage sampling wire harness is connected with the second end of electric component.Wherein, battery
Voltage collector samples wire harness by first voltage and tertiary voltage samples the voltage of wire harness the first battery of collection, wherein, the 3rd
Voltage sample wire harness is arranged far from one end of the first battery of the first end of electric component；Battery voltage acquisition device passes through second
Voltage sample wire harness and the 4th voltage sample wire harness gather the voltage of the second battery, wherein, the 4th voltage sample wire harness is arranged on
One end of second battery at the second end away from electric component.
By the present embodiment, voltage sample wire harness is set at the both ends of electric component, gather respectively battery cell voltage and
The voltage of electric component so that do not include the partial pressure of electric component in the battery cell voltage collected, eliminate collection
In battery cell voltage as caused by electric component partial pressure, it is achieved thereby that improve detection battery cell voltage precision skill
Art effect, and then solve the relatively low technical problem of ratio of precision for gathering battery cell voltage in the prior art.
According to embodiments of the present invention, a kind of device for detecting cell voltage is additionally provided.The device of the detection cell voltage
The method that above-mentioned detection cell voltage can be performed, the method for above-mentioned detection cell voltage can also pass through the detection cell voltage
Device implement.
Fig. 3 is the schematic diagram of the device of detection cell voltage according to embodiments of the present invention.As shown in figure 3, the device bag
Include setting unit 22, the first collecting unit 24 and the second collecting unit 26.
Setting unit 22 is used to set first in the first end of the electric component for connect the first battery and the second battery
Voltage sample wire harness, second voltage is set to sample wire harness at the second end of electric component.
First collecting unit 24 is used to sample wire harness by first voltage and tertiary voltage samples wire harness and gathers the first battery
Voltage, wherein, tertiary voltage sampling wire harness be arranged far from electric component first end the first battery one end.
Second collecting unit 26 is used to sample wire harness by second voltage and the 4th voltage sample wire harness gathers the second battery
Voltage, wherein, the 4th voltage sample wire harness is arranged far from one end of second battery at the second end of electric component.
For prior art when gathering the voltage of battery cell, the voltage U of the battery cell of collection includes two parts, one
Part is the virtual voltage Vc of battery cell, and another part is the partial pressure for connecting the electric component between two battery cells
VR。
When battery cell is in discharge condition (working condition), U=Vc-VR, therefore the voltage U of the battery cell gathered is small
In the virtual voltage Vc of battery cell.And when battery cell is in charged state, U=Vc+VR, therefore the battery cell gathered
Voltage U is more than the virtual voltage Vc of battery cell.
Generally, the electric component between battery is the electric component such as dynamic wire harness or cupro-nickel row.Due to point of electric component
Press VRWith the resistance of electric component and flowing through the current related of electric component, when the timing of electric current one for flowing through electric component, electrically
The resistance of component is bigger, the partial pressure V of electric componentRIt is bigger, that is to say, that the resistance of electric component is bigger, ignores electric group
Partial pressure V caused by partRAnd the error for gathering battery cell voltage is also bigger.And in the present embodiment, due to the electricity of collection first
The voltage of the voltage in pond and the second battery, in the absence of the partial pressure V of electric componentR, therefore, the battery cell of the actual acquisition of acquisition
Voltage U=Vc.
By the present embodiment, voltage sample wire harness is set at the both ends of electric component, gather respectively battery cell voltage and
The voltage of electric component so that do not include the partial pressure of electric component in the battery cell voltage collected, eliminate collection
In battery cell voltage as caused by electric component partial pressure, it is achieved thereby that improve detection battery cell voltage precision skill
Art effect, and then solve the relatively low technical problem of ratio of precision for gathering battery cell voltage in the prior art.
Alternatively, the device for the detection cell voltage that the embodiment of the present invention is provided also includes detection unit, judging unit
And determining unit.Detection unit sets first voltage to sample wire harness in the first end of electric component, at the second end of electric component
Set before second voltage samples wire harness, detect the equivalent resistance of electric component for connect the first battery and the second battery
Resistance.Judging unit is used to judge whether the resistance of equivalent resistance is more than or equal to preset resistive value.Determining unit, which is used to work as, to be sentenced
When the resistance that disconnected unit judges go out equivalent resistance is more than or equal to preset resistive value, it is determined that the first end in electric component sets the
One voltage sample wire harness, second voltage is set to sample wire harness at the second end of electric component.
Because the collection resource of battery cell voltage acquisition unit is limited, if the electricity to all series-connected cell monomers
Pneumatic module all sets extra voltage sample wire harness, can increase the consumption of the resource of battery cell voltage acquisition unit.Meanwhile
When the equivalent resistance of electric component between battery cell is smaller, the partial pressure of electric component is also smaller, in the partial pressure of electric component
It is small to when can ignore, only the resistance of equivalent resistance can be more than or equal to preset resistive value electric component set it is extra
Voltage sample wire harness.
The resistance of the equivalent resistance of electric component can be calculated according to the law of resistance, i.e., by the length of electric component,
The resistivity of the material of cross-sectional area and electric component substitutes into the law of resistance, be calculated the resistance of equivalent resistance.Electrically
The resistance of the equivalent resistance of component can also be drawn by apparatus measures such as universal meters.Preset resistive value can be carried out according to actual conditions
Set, for example, being arranged to 20 milliohms.
For example, in general, the equivalent resistance of the electric component for two battery bags of connecting is bigger, can be to series connection two
The electric component of battery bag sets extra voltage sample wire harness, the two neighboring battery cell connected in same battery bag
The equivalent resistance of electric component is smaller, can not be to electric group of the two neighboring battery cell connected in same battery bag
Part sets extra voltage sample wire harness.
Extra voltage sample is set by the electric component for being more than or equal to preset resistive value to the resistance of equivalent resistance
Wire harness, the resource of battery cell voltage acquisition unit rationally can be efficiently utilized, and improve detection battery cell voltage
Precision.
Alternatively, setting unit 22 includes the first detection sub-unit, the first setting subelement and second sets subelement.The
One detection sub-unit is for detecting whether the first end in electric component is provided with first voltage sampling wire harness, or at electric group
Second end of part is provided with second voltage sampling wire harness.First setting subelement is used for when the first detection sub-unit detects electrically
When the first end of component is provided with first voltage sampling wire harness, second voltage is set to sample wire harness at the second end of electric component.
Second setting subelement is used for when the first detection sub-unit detects that the second end of electric component is provided with second voltage sampling line
Shu Shi, first voltage is set to sample wire harness in the first end of electric component.
Voltage sample wire harness is provided between two adjacent battery cells, it is assumed that two battery cells are respectively battery list
Body C1 and battery cell C2, voltage sample wire harness L1 is provided between battery cell C1 and battery cell C2.Assuming that voltage sample
Wire harness L1 is closer to the distance with battery cell C1's, and distant with battery cell C2, then battery cell C1 and voltage sample
The equivalent resistance of electric component between wire harness L1 is smaller, the electric component between battery cell C2 and voltage sample wire harness L1
Equivalent resistance is larger, can so cause the voltage for detecting battery cell C1 more accurate, and detects battery cell C2 voltage ratio
It is more inaccurate.According to embodiments of the present invention, voltage sample wire harness L2 is set between battery cell C2 and voltage sample wire harness L1,
It is electric between battery cell C2 and voltage sample wire harness L2 and battery cell C2 and voltage sample wire harness L2 distance are very short
The equivalent resistance of component is smaller, so goes to gather battery cell C2's using voltage sample wire harness L2 rather than voltage sample wire harness L1
Voltage, the error of the voltage for the detection battery cell C2 that the partial pressure of electric component is brought can be effectively reduced, improves accuracy of detection.
By the embodiment of the present invention, detect between two adjacent battery cells existing voltage sample beam distance which
Individual battery cell is closer, the distant battery cell of existing voltage sample wire harness between two battery cells of that distance
Close to the side of another battery cell, new voltage sample wire harness is set, two adjacent battery cells can be effectively reduced
Between electric component partial pressure bring detection battery cell voltage error, improve detection battery cell voltage precision.
Alternatively, setting unit 22 includes the second detection sub-unit and the 3rd setting subelement.Second detection sub-unit is used
In detecting whether that the predeterminated position in electric component is provided with the 5th voltage sample wire harness.3rd sets subelement to be used for when second
When detection sub-unit detects that the predeterminated position of electric component is provided with the 5th voltage sample wire harness, the 5th voltage sample line is removed
Beam, and set second voltage to sample wire harness at the second end of electric component, and the first electricity is set in the first end of electric component
Pressure sampling wire harness.
The predeterminated position of electric component can be the position of the center section of electric component.If the first battery and the second electricity
Existing voltage sample wire harness is arranged on the position of the center section of the electric component of the first battery of series connection and the second battery between pond
Put, due to certain distance between the voltage sample wire harness between the first battery and existing two batteries be present, therefore the first battery
The resistance of electric component between the voltage sample wire harness be can not ignore, therefore the partial pressure of electric component causes to the first battery
The detection of voltage is inaccurate, and similarly, the partial pressure of the electric component between the second battery and the voltage sample wire harness causes to second
The detection of the voltage of battery is inaccurate, and the first battery of collection and the voltage of the second battery have relatively large deviation with actual value.
According to embodiments of the present invention, existing voltage sample wire harness between the first battery and the second battery is removed, and in electricity
The both ends of pneumatic module respectively set a voltage sample wire harness, remove to gather the first battery and the using newly-installed voltage sample wire harness
The voltage of two batteries, the resistance of electric component between two batteries is efficiently avoid to detecting the shadow of battery cell voltage
Ring, so as to improve the accuracy of detection battery cell voltage.
In embodiment provided by the present invention, it should be understood that disclosed technology contents, can be by another way
Realize.Wherein, device embodiment described above is only schematical, such as the division of the unit, can be one kind
Division of logic function, can there is an other dividing mode when actually realizing, such as multiple units or component can combine or can
To be integrated into another system, or some features can be ignored, or not perform.Another, shown or discussed is mutual
Coupling direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of unit or module,
Can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
- A kind of 1. method for detecting cell voltage, it is characterised in that including：First voltage is set to sample wire harness in the first end of the electric component for connect the first battery and the second battery, described Second end of electric component sets second voltage to sample wire harness；Wire harness is sampled by the first voltage and tertiary voltage samples the voltage of wire harness collection first battery, wherein, institute State tertiary voltage sampling wire harness be arranged far from the electric component first end first battery one end；Wire harness is sampled by the second voltage and the 4th voltage sample wire harness gathers the voltage of second battery, wherein, institute State the 4th voltage sample wire harness be arranged far from the electric component the second end second battery one end,Wherein, first voltage is set to sample wire harness in the first end of the electric component for connect the first battery and the second battery, Before second voltage sampling wire harness is set at the second end of the electric component, methods described also includes：Detect the resistance for connect first battery and the equivalent resistance of the electric component of second battery；Judge whether the resistance of the equivalent resistance is more than or equal to preset resistive value；In the case where the resistance for judging the equivalent resistance is more than or equal to the preset resistive value, it is determined that described electric The first end of component sets the first voltage sampling wire harness, sets the second voltage to adopt at the second end of the electric component Line-transect beam.
- 2. the method for detection cell voltage according to claim 1, it is characterised in that for the first battery and the of connecting The first end of the electric component of two batteries sets first voltage to sample wire harness, and the second electricity is set at the second end of the electric component Pressure sampling wire harness includes：The first end detected whether in the electric component is provided with the first voltage sampling wire harness, or at described electric group Second end of part is provided with the second voltage sampling wire harness；If the first end of the electric component is provided with the first voltage sampling wire harness, at the second end of the electric component The second voltage sampling wire harness is set；If the second end of the electric component is provided with the second voltage sampling wire harness, in the first end of the electric component The first voltage sampling wire harness is set.
- 3. the method for detection cell voltage according to claim 1, it is characterised in that for the first battery and the of connecting The first end of the electric component of two batteries sets first voltage to sample wire harness, and the second electricity is set at the second end of the electric component Pressure sampling wire harness includes：The predeterminated position detected whether in the electric component is provided with the 5th voltage sample wire harness；If being provided with the 5th voltage sample wire harness in the predeterminated position of the electric component, remove the 5th voltage and adopt Line-transect beam, and the second voltage sampling wire harness is set at the second end of the electric component, and in the electric component First end sets the first voltage sampling wire harness.
- A kind of 4. device for detecting cell voltage, it is characterised in that including：Setting unit, for setting first voltage to adopt in the first end for connect the first battery and the electric component of the second battery Line-transect beam, second voltage is set to sample wire harness at the second end of the electric component；First collecting unit, for sampling wire harness and tertiary voltage sampling wire harness collection first electricity by the first voltage The voltage in pond, wherein, the tertiary voltage sampling wire harness is arranged far from first electricity of the first end of the electric component The one end in pond；Second collecting unit, for sampling wire harness and the 4th voltage sample wire harness collection second electricity by the second voltage The voltage in pond, wherein, the 4th voltage sample wire harness is arranged far from second electricity at the second end of the electric component The one end in pond,Wherein, described device also includes：Detection unit, first voltage is set to sample wire harness for the first end in the electric component, in the electric component Before second end sets second voltage sampling wire harness, the electricity for connect first battery and second battery is detected The resistance of the equivalent resistance of pneumatic module；Judging unit, for judging whether the resistance of the equivalent resistance is more than or equal to preset resistive value；Determining unit, for judging that the resistance of the equivalent resistance is more than or equal to the pre- handicapping when the judging unit During value, it is determined that the first end in the electric component sets the first voltage sampling wire harness, the second of the electric component End sets the second voltage sampling wire harness.
- 5. the device of detection cell voltage according to claim 4, it is characterised in that the setting unit includes：First detection sub-unit, for detecting whether the first end in the electric component is provided with the first voltage sampling line Beam, or the second voltage sampling wire harness is provided with the second end of the electric component；First sets subelement, for detecting that the first end of the electric component is set when first detection sub-unit When stating first voltage sampling wire harness, the second voltage sampling wire harness is set at the second end of the electric component；Second sets subelement, for detecting that the second end of the electric component is set when first detection sub-unit When stating second voltage sampling wire harness, the first voltage sampling wire harness is set in the first end of the electric component.
- 6. the device of detection cell voltage according to claim 4, it is characterised in that the setting unit includes：Second detection sub-unit, for detecting whether the predeterminated position in the electric component is provided with the 5th voltage sample line Beam；3rd sets subelement, for detecting that the predeterminated position of the electric component is provided with when second detection sub-unit During the 5th voltage sample wire harness, the 5th voltage sample wire harness is removed, and set at the second end of the electric component The second voltage samples wire harness, and sets the first voltage sampling wire harness in the first end of the electric component.
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| CN106240375B (en) * | 2016-08-17 | 2018-06-05 | 杭州新时空电动汽车有限公司 | Vehicle-mounted internet intelligent control system and its control method |
| CN108306349A (en) * | 2017-01-13 | 2018-07-20 | 宁德时代新能源科技股份有限公司 | Battery equalization sampling method |
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