CN106740228B - Voltage consistency detection method and device and voltage equalization method and device - Google Patents
Voltage consistency detection method and device and voltage equalization method and device Download PDFInfo
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- CN106740228B CN106740228B CN201710025756.5A CN201710025756A CN106740228B CN 106740228 B CN106740228 B CN 106740228B CN 201710025756 A CN201710025756 A CN 201710025756A CN 106740228 B CN106740228 B CN 106740228B
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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
- 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
- B60L58/19—Switching between serial connection and parallel connection of battery modules
-
- 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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/13—Maintaining the SoC within a determined range
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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- 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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention provides a voltage consistency detection method and device and a voltage equalization method and device. On one hand, the embodiment of the invention detects the voltage difference and the energy difference between the first battery system and the second battery system; and judging whether the first battery system and the second battery system accord with voltage consistency or not based on the voltage difference and the energy difference, wherein when the voltage consistency is accorded, the first battery system and the second battery system are connected in parallel, factors of different internal resistance values of different battery systems are considered, and whether the battery systems accord with the voltage consistency or not is comprehensively judged through the voltage difference and the energy difference between the battery systems, so that the accuracy of voltage consistency detection is improved, and the problem of lower accuracy of branch voltage consistency detection of the multi-branch parallel battery system is solved.
Description
[technical field]
This programme is related to electronic technology field more particularly to a kind of voltage consistency detecting method and device, electric voltage equalization
Method and device.
[background technique]
Pure electric vehicle bus has the advantages that pollution-free, noise is low, therefore development prospect is very wide.Battery system is pure electricity
The primary key of dynamic bus development.The dynamical system and energy-storage system of pure electric vehicle bus require the support of battery system.
In order to improve the conveyance capacity of battery system, present many pure electric vehicle bus electrokinetic cell systems and energy-storage battery
System is in parallel using multiple branch circuit battery system.It is illustrated by taking two branch circuit parallel connection battery systems as an example below.
Referring to FIG. 1, it is the exemplary diagram in parallel of two branched battery systems.As shown in Figure 1, branch 1 is by battery case
Pack1-1, battery case Pack1-2 ... battery case Pack1- (n-1), battery case Pack1-n are composed in series, and branch 2 is by battery
Case Pack2-1, battery case Pack2-2 ... battery case Pack2- (n-1), battery case Pack2-n composition, branch 1 and branch 2 are simultaneously
Connection two branch circuit parallel connection battery systems of composition.Wherein, the voltage of branch 1 is U1, and the voltage of branch 2 is U2, is assembling and is tieing up after sale
During shield, (by the MSD of Pack1-1, (Manual Service Disconnect, manual maintenance are opened when by two branch circuit parallel connections
Close) as last tie point in parallel), if U1 ≠ U2, since the high pressure connection resistance value between the internal resistance of cell and battery is smaller, meeting
There are the security risks such as sparking at the MSD of the high branch of the voltage branch large current charge and Pack1-1 low to voltage.
Therefore, before carrying out parallel connection to battery system, branch voltage (the i.e. branch to multiple branch circuit batteries in parallel connection system is needed
The voltage of battery system) carry out consistency detection.Consistency detection refers to that detection will carry out each branched battery system in parallel and be
It is no to meet condition in parallel, if met, each branched battery system can be carried out in parallel.If do not met, it is necessary to branch
Road voltage carries out balanced, each branch satisfaction condition in parallel after making equilibrium.
In the prior art, the scheme of multiple branch circuit batteries in parallel connection system branch voltage consistency detection is: to multiple branch circuit parallel connection
Each branch is detected two-by-two in battery system, and the voltage difference of two branches, the voltage difference that then will be measured are measured with voltmeter
It is compared with fixed voltage difference threshold value, if the voltage difference measured is greater than voltage difference threshold value, determines that two branch is not inconsistent
Merge bracing part, not can be carried out parallel connection, if the voltage difference measured is less than voltage difference threshold value, determines that two branch meets parallel connection
Condition can carry out parallel connection.
Since different battery system specifications parameters is different, only pass through a fixed voltage difference threshold values to determine whether
Can parallel connection have the following problems: if voltage difference threshold values is smaller, will lead to and be much not required to carry out balanced multiple branch circuit battery systems
System will first carry out electric voltage equalization and just can be carried out branch circuit parallel connection, wasting manpower and material resources；If voltage difference threshold values is larger, there is erroneous judgement wind
Danger will lead to large current charge or sparking risk.
As it can be seen that multiple branch circuit batteries in parallel connection system branch voltage consistency detection scheme in the prior art, is not to lead to one
The battery system for actually capableing of parallel connection a bit could be in parallel after carrying out equilibrium, exactly makes some batteries for being actually unable in parallel connection
System is directly in parallel and causes security risk, and the accuracy of detection is relatively low.
[summary of the invention]
In view of this, this programme embodiment provides a kind of voltage consistency detecting method and device, voltage balancing method
And device, to solve, the consistency detection accuracy of multiple branch circuit batteries in parallel connection system branch voltage is relatively low in the prior art is asked
Topic.
In a first aspect, this programme embodiment provides a kind of voltage consistency detecting method, it is applied to multiple branch circuit batteries in parallel connection
The first battery system and the second battery system of system, which comprises
Detect the voltage difference of first battery system Yu second battery system；
Detect the energy difference of first battery system Yu second battery system；
Based on the voltage difference and the energy difference, judge between first battery system and second battery system
Whether meet voltage consistency, wherein when meet voltage consistency, first battery system and second battery system into
Row is in parallel.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation is based on the electricity
Pressure difference and the energy difference judge whether meet voltage consistency between first battery system and second battery system
The step of include:
If the voltage difference is greater than voltage difference threshold value, both first battery system and second battery system are detected
In high-pressure system variable resistance when being charged by variable resistance to the low-pressure system in described the two with constant current value
Resistance value；
Judge whether meet voltage between first battery system and second battery system according to the resistance value
Consistency.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, according to the electricity
Resistance value judges that the step of whether meeting voltage consistency between first battery system and second battery system includes:
If the resistance value is greater than resistance value threshold value, judge between first battery system and second battery system
Voltage consistency is not met, first battery system and second battery system are without parallel connection.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, according to the electricity
Resistance value judges that the step of whether meeting voltage consistency between first battery system and second battery system includes:
If the resistance value is less than resistance value threshold value, detect when the high-pressure system directly charges to the low-pressure system
Charging current；
Judge whether meet electricity between first battery system and second battery system according to the charging current
Press consistency.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation is filled according to described
Electric current judges that the step of whether meeting voltage consistency between first battery system and second battery system includes:
If the charging current is greater than current threshold, judge between first battery system and second battery system
Voltage consistency is not met, first battery system and second battery system are without parallel connection；
Alternatively, judging first battery system and second battery system if the charging current is less than current threshold
Meet voltage consistency between system.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation is based on the electricity
Pressure difference and the energy difference judge whether meet voltage consistency between first battery system and second battery system
The step of include:
If the voltage difference is less than voltage difference threshold value, judge between first battery system and second battery system
Meet voltage consistency.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, first electricity
At most having one in both cell system and second battery system is the battery composed in parallel by more than two battery systems
System.
Second aspect, this programme embodiment provide a kind of voltage consistency detection device, are applied to multiple branch circuit batteries in parallel connection
The first battery system and the second battery system, described device of system include:
Detection module, for detecting the voltage difference and energy difference of first battery system Yu second battery system；
Determining module judge first battery system and described for being based on the voltage difference and the energy difference
Whether voltage consistency is met between two battery systems, wherein when meeting voltage consistency, first battery system and described
Second battery system carries out in parallel.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the determining mould
Block is used to judge institute based on the energy difference between the voltage difference and first battery system and second battery system
It states when whether meeting voltage consistency between the first battery system and second battery system, is specifically used for:
If the voltage difference is greater than voltage difference threshold value, both first battery system and second battery system are detected
In high-pressure system variable resistance when being charged by variable resistance to the low-pressure system in described the two with constant current value
Resistance value；
Judge whether meet voltage between first battery system and second battery system according to the resistance value
Consistency.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the determining mould
Block is for determining whether meet voltage between first battery system and second battery system according to the resistance value
When consistency, it is specifically used for:
If the resistance value is greater than resistance value threshold value, judge between first battery system and second battery system
Voltage consistency is not met, first battery system and second battery system are without parallel connection.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the determining mould
Block is for judging whether meet voltage between first battery system and second battery system according to the resistance value
When consistency, it is specifically used for:
If the resistance value is less than resistance value threshold value, detect when the high-pressure system directly charges to the low-pressure system
Charging current；
Judge whether meet electricity between first battery system and second battery system according to the charging current
Press consistency.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the determining mould
Block is for judging whether meet electricity between first battery system and second battery system according to the charging current
When pressing consistency, it is specifically used for:
If the charging current is greater than current threshold, judge between first battery system and second battery system
Voltage consistency is not met, first battery system and second battery system are without parallel connection；
Alternatively, judging first battery system and second battery system if the charging current is less than current threshold
Meet voltage consistency between system, first battery system and second battery system carry out in parallel.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the determining mould
Block is used to judge first battery system and institute based on the voltage difference and first battery system and the energy difference
It states when whether meeting voltage consistency between the second battery system, is specifically used for:
If the voltage difference is less than voltage difference threshold value, judge between first battery system and second battery system
Meet voltage consistency.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, first electricity
At most having one in both cell system and second battery system is the battery composed in parallel by more than two battery systems
System.
Voltage consistency detecting method and voltage consistency detection device provided in an embodiment of the present invention, it is contemplated that different
The different factor of the internal resistance value of battery system, by voltage difference between battery system and energy difference come comprehensive descision battery system
Between whether meet voltage consistency, improve the accuracy of voltage consistency detection.
The third aspect, this programme embodiment provide a kind of voltage balancing method, applied to multiple branch circuit batteries in parallel connection system
First battery system and the second battery system, the voltage of first battery system are greater than the voltage of second battery system,
Include:
So that first battery system is charged with constant current value to second battery system by variable resistance, is denoted as
First charging circuit；
Detect the resistance value of the variable resistance；
If the resistance value of the variable resistance is less than resistance value threshold value, first charging circuit is disconnected, makes first electricity
Cell system directly charges to second battery system, is denoted as the second charging circuit, and detect filling for second charging circuit
Electric current；
Judged whether to stop charging according to the charging current detected.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, according to detecting
Charging current judge whether stop charging the step of include:
If the charging current detected is greater than current threshold, continue that the first battery system is made to pass through second charging circuit
It charges to second battery system；
Alternatively, stopping charging to second battery system if the charging current detected is less than current threshold.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, further includes:
If the resistance value of the variable resistance is greater than the resistance value threshold value, continue to make the first battery system by described first
Charging circuit charges to the second battery system.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, first electricity
At most having one in both cell system and second battery system is the battery composed in parallel by more than two battery systems
System.
Fourth aspect, this programme embodiment provide the voltage balancing device between a kind of battery system, are applied to multiple branch circuit simultaneously
Join the first battery system and the second battery system of battery system, the voltage of first battery system is greater than second battery
The voltage of system, comprising:
First charging module, for make first battery system by variable resistance with constant current value to described second
Battery system charging, is denoted as the first charging circuit；
Resistance value detection module, for detecting the resistance value of the variable resistance；
Second charging module when being less than resistance value threshold value for the resistance value in the variable resistance, disconnects described first and fills
Circuit makes first battery system directly charge to second battery system, is denoted as the second charging circuit, and detect institute
State the charging current of the second charging circuit；
Switch module, the charging current for being detected according to second charging module judge whether to stop charging.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the switching molding
Block is used to be specifically used for when judging whether to stop charging according to the charging current detected:
If the charging current detected is greater than current threshold, continue that the first battery system is made to pass through second charging circuit
It charges to second battery system；
Alternatively, stopping charging to second battery system if the charging current detected is less than current threshold.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, further includes:
Second switch module continues to make first when being greater than the resistance value threshold value for the resistance value in the variable resistance
Battery system is charged by first charging circuit to the second battery system.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, first electricity
At most having one in both cell system and second battery system is the battery composed in parallel by more than two battery systems
System.
Voltage balancing method and voltage balancing device provided in an embodiment of the present invention, can be monitored balancing procedure,
After equilibrium reaches standard, stops charging in time, prevent to overcharge, to improve the security performance of balancing procedure.
5th aspect, this programme embodiment provide a kind of battery system detection and equal balance system, the system comprises electricity
The voltage balancing device between consistency detection device and battery system is pressed,
The voltage consistency detection device is any voltage consistency detection device described in second aspect,
Voltage balancing device between the battery system is that the voltage between any battery system described in fourth aspect is equal
Weigh device.
6th aspect, this programme embodiment provide detection and the equalizing circuit of a kind of battery system, which is characterized in that described
Circuit include first switch, second switch, variable resistance, controller, voltage detection device, current detecting equipment, anode interface,
Cathode interface, the both ends of the voltage detection device are connected with the anode interface and the cathode interface respectively, the electric current
Detection device and the second switch are connected between the anode interface and the cathode interface, the first switch with it is described
Variable resistance composition series circuit it is in parallel with the second switch, the first switch, the second switch, it is described can power transformation
Resistance, the voltage detection device, the current detecting equipment controller pass through low-voltage transmission line respectively and are connected with the controller,
Other connecting lines in the circuit in addition to the low-voltage transmission line are hv transmission line.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, it is described can power transformation
Resistance is program-controlled load.
The detection of battery system provided in an embodiment of the present invention and equalizing circuit, by voltage difference between battery system and
Energy difference whether meet voltage consistency between comprehensive descision battery system, improves the accuracy of voltage consistency detection,
And the balancing procedure of battery system can be monitored, after equilibrium reaches standard, stop charging in time, prevented
It fills, to improve the security performance of balancing procedure.
[Detailed description of the invention]
It, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of this programme embodiment
Figure is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of this programme, for this field
For those of ordinary skill, without any creative labor, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the exemplary diagram in parallel of two branched battery systems.
Fig. 2 is the flow diagram of voltage consistency detecting method in the embodiment of the present invention one.
Fig. 3 is the functional block diagram of voltage consistency detection device in the embodiment of the present invention two.
Fig. 4 is the flow diagram of voltage balancing method in the embodiment of the present invention three.
Fig. 5 is the functional block diagram of voltage balancing device in the embodiment of the present invention four.
Fig. 6 is the detection of battery system and the circuit diagram of equalizing circuit in the embodiment of the present invention six.
[specific embodiment]
In order to better understand the technical solution of this programme, this programme embodiment is retouched in detail with reference to the accompanying drawing
It states.
It will be appreciated that described embodiment is only this programme a part of the embodiment, instead of all the embodiments.Base
Embodiment in this programme, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment belongs to the range of this programme protection.
The term used in this programme embodiment is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
This programme.In this programme embodiment and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
The embodiment of the invention provides a kind of voltage consistency detecting method, which can be applied
In the first battery system and the second battery system of multiple branch circuit batteries in parallel connection system.
Fig. 2 is the flow diagram of voltage consistency detecting method in the embodiment of the present invention one.As shown in Fig. 2, this implementation
In example, voltage consistency detecting method includes the following steps:
S201 detects the voltage difference of the first battery system and the second battery system；
If the first battery system is in state in parallel with the second battery system, by the first battery system and the second battery
The High voltage output of the batteries in parallel connection system of system composition disconnects, and then returns what the first battery system and the second battery system formed
Road disconnects at any point, measures the voltage difference of gap point-to-point transmission, which is the first battery system and the second battery
The voltage difference of system.For example, using the MSD of Pack1-1 as being finally connected in parallel a little, after MSD is disconnected, measuring MSD in Fig. 1
Voltage between two-end-point is to get to the voltage difference between two battery systems.
S202 detects the energy difference of the first battery system and the second battery system；
S203 is based on voltage difference and energy difference, judges whether meet electricity between the first battery system and the second battery system
Press consistency, wherein when meeting voltage consistency, the first battery system and the second battery system carry out in parallel.
In view of the internal resistance value of different battery systems is different, therefore cannot be only in accordance with a fixed voltage difference threshold value
To determine whether in parallel.In the present embodiment, voltage difference and energy difference between the first battery system of foundation and the second battery system,
Judge whether meet voltage consistency between the first battery system and the second battery system, if meet voltage consistency, just
It determines that the first battery system and the second battery system can be in parallel, if not meeting voltage consistency, determines that the first battery system
System and the second battery system cannot be in parallel, need to carry out electric voltage equalization.
Wherein, energy difference is related between the first battery system and the second battery system straight to low-pressure system by high-pressure system
Charging current when charging is connect, for convenience, this charging current is known as to plug in electric current.If energy difference
Excessive, plugging in electric current will be very big, so that the security risk struck sparks at MSD be caused directly to fill if energy difference is smaller
Electric current will be smaller, if plugging in small to one current threshold of electric current hereinafter, would not cause to be difficult to make in other words
At the security risk struck sparks at MSD, this when, even if the voltage difference between the first battery system and the second battery system is greater than
The voltage difference threshold value of setting can also carry out parallel connection, because in parallel between the first battery system and the second battery system at this time, i.e.,
Make there are the plug-in electric current that high-pressure system charges to low-pressure system, which will not cause security risk.
Accordingly, in a particular application, a lesser voltage difference threshold value can be set, by voltage difference threshold value by some electricity
The battery system that pressure difference is less than voltage difference threshold value is determined as battery system that can be in parallel.Since voltage difference threshold value comparison is small, because
This, it is relatively high that these voltage differences are less than with the consistency detection accuracy of the battery system of voltage difference threshold value.For voltage
Difference is greater than the battery system of voltage difference threshold value, further regards its energy difference situation, it is determined whether can be in parallel, in other words, really
It is fixed whether to meet voltage consistency.
During a concrete implementation, it is based on voltage difference and energy difference, judges the first battery system and the second battery
The step of whether meeting voltage consistency between system further include: if voltage difference is greater than voltage difference threshold value, detect the first battery system
High-pressure system in both system and the second battery system is filled the low-pressure system in the two with constant current value by variable resistance
The resistance value of variable resistance when electric；Judge whether meet voltage between the first battery system and the second battery system according to resistance value
Consistency.
Wherein, variable resistance can be program-controlled resistor.
When the high-pressure system between the first battery system and the second battery system passes through variable resistance to the low pressure in the two
When system is with constant current value charging (this charging circuit for convenience of description, is denoted as the first charging circuit), since electric current is constant,
The resistance value of so variable resistance is bigger, illustrates that the energy consumed on variable resistance is bigger (because of the energy consumed on variable resistance
Measure W=I2R), the energy consumed on variable resistance is bigger, illustrates the energy difference between the first battery system and the second battery system
It is bigger.When current value is constant, the energy consumed on variable resistance is directly proportional to the resistance value of variable resistance, therefore, works as electric current
When being worth constant, the energy difference between the first battery system and the second battery system is directlyed proportional to the resistance value of variable resistance.
Wherein, the high-pressure system between the first battery system and the second battery system is by variable resistance to low in the two
The constant current value that pressure system is charged with constant current value can be set to this by allowing most in variable resistance charging circuit
The maximum current value is denoted as the first current threshold I10 for convenience of description by high current value.
In this way, resistance threshold R0 can further be arranged, in this way, the ceiling capacity consumed on variable resistance is allowed to be equal to
I10*I10*R0.When the high-pressure system between the first battery system and the second battery system passes through variable resistance to low in the two
When pressure system is with constant current value I10 charging, the energy of variable resistance consumption is directly proportional to the resistance value of variable resistance.
Further, during a concrete implementation, the first battery system and the second battery are judged according to resistance value
The step of whether meeting voltage consistency between system further include: if resistance value is greater than resistance value threshold value, judge the first battery system
Voltage consistency is not met between system and the second battery system, the first battery system and the second battery system are without parallel connection.
Further, during a concrete implementation, the first battery system and the second battery are judged according to resistance value
The step of whether meeting voltage consistency between system further include: if resistance value is less than resistance value threshold value, detection high-pressure system is straight
Charging current when connecing to low-pressure system charging；Judged between the first battery system and the second battery system according to the charging current
Whether voltage consistency is met.
The case where resistance value threshold value is less than for resistance value, illustrate the energy between the first battery system and the second battery system
Amount difference is smaller, but it is possible to measure difference, whether small to making, both the first battery system and the second battery system are in parallel not to have safety wind
The degree of danger, it is also necessary to further judgement.At this moment, charging current when can directly be charged to low-pressure system by high-pressure system
Size judges the degree of danger of energy difference.Obviously, it is smaller to plug in electric current, illustrates that energy difference is smaller, it is in parallel dangerous smaller,
Vice versa.For this purpose, second current threshold can be set, when plugging in electric current less than the second current threshold, illustrate energy
Poor very little is measured, is not enough to cause security risk in parallel, thinks to meet between the first battery system and the second battery system at this time
Voltage consistency, can be in parallel, if plugging in electric current is greater than the second current threshold, illustrates that energy difference is bigger, it is sufficient to make
At security risk in parallel, think not meeting voltage consistency between the first battery system and the second battery system at this time, it cannot
It is in parallel.
Therefore, further, during a concrete implementation, according to the charging current judge the first battery system with
The step of whether meeting voltage consistency between second battery system further include: if charging current is (i.e. above-mentioned greater than current threshold
The second current threshold referred to), judge not meeting voltage consistency between the first battery system and the second battery system, the first electricity
Cell system and the second battery system are without parallel connection；Alternatively, if charging current be less than current threshold, judge the first battery system and
Meet voltage consistency between second battery system, the first battery system and the second battery system carry out in parallel.
During a concrete implementation, it is based on voltage difference and energy difference, judges the first battery system and the second battery
The step of whether meeting voltage consistency between system further include: if voltage difference is less than voltage difference threshold value, judge the first battery system
Meet voltage consistency between system and the second battery system.
At most there is one to serve as reasons during a concrete implementation, in both the first battery system and the second battery system
The battery system that more than two battery systems compose in parallel.That is, the first battery system and the second battery system composition
Batteries in parallel connection system can be two branch circuit parallel connection battery systems, be also possible to the multiple branch circuits such as three branch circuit parallel connection battery systems parallel connection
Battery system.For multiple branch circuit batteries in parallel connection systems more than three branches, can be regarded as by the non-parallel connection of a single spur track
Two branched battery systems of batteries in parallel connection system composition more than battery system and two branches, so as to apply this implementation
Consistency detecting method in example is detected.Certainly, on condition that, it is each in batteries in parallel connection system more than two branch therein
It is to have already passed through consistency detection between a single spur track battery system to meet voltage consistency, is capable of battery system in parallel.
Voltage consistency detecting method provided in an embodiment of the present invention, it is contemplated that the internal resistance value of different battery systems is different
Factor, it is consistent that whether voltage is met between comprehensive descision battery system by the voltage difference between battery system and energy difference
Property, improve the accuracy of voltage consistency detection.
In order to realize each step in aforesaid voltage consistency detecting method embodiment, the embodiment of the invention also provides electricity
Press consistency detection Installation practice.
Embodiment two
The present embodiment proposes a kind of voltage consistency detection device, which is applied to multiple branch circuit
The first battery system and the second battery system of batteries in parallel connection system.
Fig. 3 is the functional block diagram of voltage consistency detection device in the embodiment of the present invention two.As shown in figure 3, this implementation
In example, voltage consistency detection device further include:
Detection module 310, for detecting the voltage difference and energy difference of the first battery system and the second battery system；
Determining module 320 judges between the first battery system and the second battery system for being based on voltage difference and energy difference
Whether voltage consistency is met, wherein when meeting voltage consistency, the first battery system and the second battery system carry out in parallel.
During a concrete implementation, determining module 320 is used to be based on voltage difference and energy difference, judges the first electricity
When whether meeting voltage consistency between cell system and second battery system, it is specifically used for: if voltage difference is greater than voltage difference
Threshold value detects the high-pressure system in both the first battery system and the second battery system by variable resistance to the low pressure in the two
The resistance value of variable resistance when system is charged with constant current value；The first battery system and the second battery system are judged according to resistance value
Whether voltage consistency is met between system.
Further, during a concrete implementation, determining module 320 is used to judge the first electricity according to resistance value
When whether meeting voltage consistency between cell system and the second battery system, it is specifically used for: if resistance value is greater than resistance value threshold value,
Judge not meeting voltage consistency, the first battery system and the second battery between the first battery system and second battery system
System is without parallel connection.
Further, during a concrete implementation, determining module 320 is used to judge the first electricity according to resistance value
When whether meeting voltage consistency between cell system and the second battery system, it is specifically used for: if resistance value is less than resistance value threshold value,
Detect charging current when high-pressure system directly charges to low-pressure system；The first battery system and second are judged according to charging current
Whether voltage consistency is met between battery system.
Further, during a concrete implementation, determining module 320 is for judging first according to charging current
When whether meeting voltage consistency between battery system and the second battery system, it is specifically used for: if charging current is greater than current threshold
Value, judges not meeting voltage consistency between the first battery system and the second battery system, the first battery system and the second battery
System is without parallel connection；Alternatively, judging between the first battery system and the second battery system if charging current is less than current threshold
Meet voltage consistency, the first battery system and the second battery system carry out in parallel.
During a concrete implementation, determining module 320 is used to be based on voltage difference and energy difference, judges the first electricity
When whether meeting voltage consistency between cell system and the second battery system, it is specifically used for: if voltage difference is less than voltage difference threshold value,
Judge to meet voltage consistency between the first battery system and the second battery system.
Wherein, at most having one in both the first battery system and the second battery system is by more than two battery systems
The battery system composed in parallel.
Voltage consistency in previous embodiment one is able to carry out by voltage consistency detection device in this present embodiment
Detection method, the part that the present embodiment is not described in detail can refer to voltage consistency detecting method in previous embodiment one
Related description.
Voltage consistency detection device provided in an embodiment of the present invention, it is contemplated that the internal resistance value of different battery systems is different
Factor, it is consistent that whether voltage is met between comprehensive descision battery system by the voltage difference between battery system and energy difference
Property, improve the accuracy of voltage consistency detection.
Embodiment three
A kind of voltage balancing method is present embodiments provided, which is applied to multiple branch circuit batteries in parallel connection system
The first battery system and the second battery system, wherein the voltage of the first battery system be greater than the second battery system voltage.
Fig. 4 is the flow diagram of voltage balancing method in the embodiment of the present invention three.As shown in figure 4, in the present embodiment, electricity
Pressing equalization methods further includes following steps:
S401 makes the first battery system be charged to the second battery system with constant current value by variable resistance, is denoted as the
One charging circuit；
Wherein, constant current value is that the maximum current value (being denoted as Ipmax) that can bear of branched battery system and equilibrium are set
Small value in standby maximum current value (being denoted as Icmax) the two that can bear.
S402 detects the resistance value of variable resistance；
S403 disconnects the first charging circuit, keeps the first battery system straight if the resistance value of variable resistance is less than resistance value threshold value
It connects to the second battery system and charges, be denoted as the second charging circuit, and detect the charging current of the second charging circuit；
The resistance value of variable resistance is less than resistance value threshold value, illustrates the energy between the first battery system and the second battery system
Difference is small to a certain extent, but whether the energy difference is small is not enough to when the first battery system is in parallel with the second battery system
Cause the degree of security risk, it is also necessary to the charging current directly to charge to the second battery system according to the first battery system
To determine.
S404 judges whether to stop charging according to the charging current detected.
During a concrete implementation, judge whether that the step of stopping charging also wrapping according to the charging current detected
It includes: if the charging current detected is greater than current threshold, continuing to keep the first battery system electric to second by the second charging circuit
Cell system charging；Alternatively, stopping charging to the second battery system if the charging current detected is less than current threshold.
The charging current that first battery system directly charges to the second battery system is greater than current threshold, illustrates the first battery
Energy difference between system and the second battery system is arrived when the first battery system is in parallel with the second battery system not there are no small
It is enough to cause the degree of security risk, needs to continue equilibrium.If the first battery system is directly filled to the second battery system
The charging current of electricity is less than current threshold, illustrates that the energy difference between the first battery system and the second battery system is small and arrives
First battery system is not enough to cause the degree of security risk when in parallel with the second battery system, need not continue to carry out equilibrium,
It can stop charging to the second battery system at this time, to stop equilibrium.
During a concrete implementation, the voltage balancing method is also further include: if the resistance value of variable resistance is greater than
Resistance value threshold value continues that the first battery system is made to charge by the first charging circuit to the second battery system.
Wherein, at most having one in both the first battery system and the second battery system is by more than two battery systems
The battery system composed in parallel.
Voltage balancing method provided in an embodiment of the present invention can be monitored balancing procedure, reach standard in equilibrium
Afterwards, stop charging in time, prevent to overcharge, to improve the security performance of balancing procedure.
Example IV
In order to realize each step in aforesaid voltage equalization methods embodiment, the embodiment of the invention also provides electric voltage equalizations
Installation practice.
A kind of voltage balancing device is present embodiments provided, which is applied to multiple branch circuit batteries in parallel connection system
The first battery system and the second battery system, the voltage of the first battery system is greater than the voltage of second battery system.
Fig. 5 is the functional block diagram of voltage balancing device in the embodiment of the present invention four.As shown in figure 5, in the present embodiment, electricity
Pressure balancer include:
First charging module 510, for make the first battery system by variable resistance with constant current value to the second battery
System charging, is denoted as the first charging circuit；
Resistance value detection module 520, for detecting the resistance value of variable resistance；
Second charging module 530 when being less than resistance value threshold value for the resistance value in variable resistance, disconnects the first charging electricity
Road makes the first battery system directly charge to the second battery system, is denoted as the second charging circuit, and detect the second charging circuit
Charging current；
First switch module 540, for according to the second charging module detection 530 to charging current judge whether stop fill
Electricity.
During a concrete implementation, first switch module 540 is used for according to the charging current judgement detected
When whether stopping is charged, it is specifically used for: if the charging current detected is greater than current threshold, continues to pass through the first battery system
Second charging circuit charges to the second battery system；Alternatively, stopping if the charging current detected is less than current threshold to second
Battery system charging.
During a concrete implementation, voltage balancing device further include:
Second switch module continues to make first when being greater than the resistance value threshold value for the resistance value in the variable resistance
Battery system is charged by first charging circuit to the second battery system.
Wherein, at most having one in both the first battery system and second battery system is by more than two batteries
The battery system that system composes in parallel.
Voltage balancing method in previous embodiment three, this reality are able to carry out by voltage balancing device in this present embodiment
The part that example is not described in detail is applied, can refer to the related description to voltage balancing method in previous embodiment one.
Voltage balancing device provided in an embodiment of the present invention can be monitored balancing procedure, reach standard in equilibrium
Afterwards, stop charging in time, prevent to overcharge, to improve the security performance of balancing procedure.
It should be noted that the voltage balancing method of the voltage consistency detecting method of embodiment one and embodiment three can be with
It is combined together application, the voltage consistency of battery system is examined using the voltage consistency detecting method of embodiment one
It surveys, is carried out for the battery system without voltage consistency detected, then using the voltage balancing method of embodiment three
Weighing apparatus.
It illustrates, it is assumed that have the non-batteries in parallel connection system of 4 single spur tracks: 50 volts of 1 voltage of battery system, battery system 2
80 volts of voltage, 100 volts of 3 voltage of battery system, 120 volts of 4 voltage of battery system.
The voltage consistency detecting method of Application Example one first detects battery system 1 and battery system 2, inspection
It surveys the result is that battery system 1 and battery system 2 do not have voltage consistency；
Then the voltage balancing method of Application Example three carries out electric voltage equalization processing to battery system 1 and battery system 2,
The voltage of battery system 1 and battery system 2 all becomes 60 volts after equilibrium；
By 2 parallel connection of battery system 1 and battery system after equilibrium, battery system 11 is formed, to battery system 11 and battery
The voltage consistency detecting method of 3 Application Example one of system is detected, and testing result is battery system 1 and battery system 2
Without voltage consistency；
The voltage balancing method of Application Example three carries out electric voltage equalization processing to battery system 11 and battery system 3,
The voltage of battery system 11 and battery system 3 all becomes 70 volts after weighing apparatus；
By 3 parallel connection of battery system 11 and battery system after equilibrium, battery system 12 is formed, to battery system 12 and battery
The voltage consistency detecting method of 4 Application Example one of system is detected, and testing result is battery system 11 and battery system 4
Without voltage consistency；
The voltage balancing method of Application Example three carries out electric voltage equalization processing to battery system 12 and battery system 4,
The voltage of battery system 12 and battery system 4 all becomes 75 volts after weighing apparatus；
Finally by 4 parallel connection of battery system 12 and battery system after equilibrium, in this way, being achieved that multiple branched battery systems
Voltage consistency detection and equilibrium.
Embodiment five
The detection and equal balance system, the system for present embodiments providing a kind of battery system include voltage consistency detection dress
Set the voltage balancing device between battery system.
Wherein, voltage consistency detection device is any voltage consistency detection device in previous embodiment two,
Wherein, voltage balancing device is any voltage balancing device in previous embodiment four.
Embodiment six
Present embodiments provide detection and the equalizing circuit of a kind of battery system.
Fig. 6 is the detection of battery system and the circuit diagram of equalizing circuit in the embodiment of the present invention six.As shown in fig. 6, this reality
It applies in example, the detection of battery system and equalizing circuit include first switch S1, second switch S2, variable resistance, controller, voltage
Detection device, current detecting equipment, anode interface, cathode interface, wherein the both ends of voltage detection device respectively with anode interface
It is connected with cathode interface, current detecting equipment and second switch S2 are connected between anode interface and cathode interface, first switch
S1 and the series circuit that variable resistance forms are in parallel with second switch S2, first switch S1, second switch S2, variable resistance, electricity
Pressure detection device, current detecting equipment controller pass through low-voltage transmission line respectively and are connected with controller, except low pressure passes in the circuit
Other connecting lines outside defeated line are hv transmission line.
Wherein, variable resistance can be program-controlled load.
It, can be using this after detection and equal balance system that battery system described in previous embodiment five is installed in the controller
The detection of battery system in embodiment and equalizing circuit are realized to the voltage consistency detection of battery system and to not having
The battery system of voltage consistency carries out electric voltage equalization.Below by taking two branch circuit parallel connections battery system shown in FIG. 1 as an example, illustrate to examine
The process and principle of survey and equilibrium are as follows:
1) setup parameter first:
Voltage difference threshold values: Δ U0
Preliminary filling loop resistance threshold values: R0；
Loop current threshold values where S1: I10；
Loop current threshold values where S2: I20；
The maximum current value that branched battery system can bear: Ipmax；
The maximum current value that equalizing equipment can bear: Icmax.
2) equipment connects: for two branch circuit parallel connections battery system shown in FIG. 1, disconnecting battery system Anode and battery system
The external High voltage output of cathode, using the MSD of Pack1-1 as being finally connected in parallel a little, by anode interface and cathode interface and mouth
The MSD interface of Pack1-1 is connected.
3) voltage consistency detection, with judge whether can be in parallel:
3.1) voltage difference detects: using the voltage difference delta U between voltage detection device detection Pack1 and Pack2；
3.2) voltage difference determines: as Δ U≤Δ U0, that is, judging that Pack1 and Pack2 meet voltage consistency, meets branch
Condition in parallel, end judges process, and informs that user's battery system meets branch circuit parallel connection condition；As Δ U > Δ U0, into step
Rapid 3.3.
3.3) as Δ U > Δ U0, the S1 being closed in preliminary filling circuit, variable resistance loop current I1=where S1 is adjusted
I10 records the resistance value R of variable resistance at this time.
3.4) the resistance value R judgement of variable resistance: as R > R0, that is, judging that Pack1 and Pack2 do not meet voltage consistency,
Battery system is unsatisfactory for branch circuit parallel connection condition, into the branch voltage equilibrium process of below step 4；As R≤R0, enter step
3.5。
3.5) as R≤R0, the switch S2 being closed in preliminary filling circuit, the electric current I2 in circuit, obtains I2 where measurement switch S2
Switch S1 and switch S2 is disconnected afterwards.
3.6) current value I2 judges: as I2 > I20, that is, judging that Pack1 and Pack2 do not meet voltage consistency, battery system
System is unsatisfactory for branch circuit parallel connection condition, into the branch voltage equilibrium process of below step 4；As I2≤I20, judge Pack1 and
Pack2 meets voltage consistency, and battery system meets branch circuit parallel connection condition, terminates determination flow, and inform the client battery system
System meets branch circuit parallel connection condition.
4) branch voltage is balanced:
4.1) after being unsatisfactory for branch circuit parallel connection condition and entering branch equilibrium process, user's battery system can be informed first not
Meet condition in parallel, and enters step 4.2.
4.2) closure switch S1 adjusts variable resistance, and electric current I1 is stablized the minimum value in both Ipmax and Icmax,
Constant-current charge is carried out, the resistance value R of the variable resistance during constant-current charge is recorded.
4.3) resistance value R judges: as R > R0, return step 4.2 continues constant-current charge；As R≤R0, enter step
4.4。
4.4) as R≤R0, closure switch S2, loop current I2 where recording switch S2.
4.5) current value I2 judges: as I2 > I20, return step 4.4 continues to keep S2 closure；As I2≤I20, disconnect
S1 and S2 terminates balanced process, judges that battery system meets branch circuit parallel connection condition.
The detection of battery system provided in an embodiment of the present invention and equalizing circuit, by voltage difference between battery system and
Energy difference whether meet voltage consistency between comprehensive descision battery system, improves the accuracy of voltage consistency detection,
And the balancing procedure of battery system can be monitored, after equilibrium reaches standard, stop charging in time, prevented
It fills, to improve the security performance of balancing procedure.
The foregoing is merely the preferred embodiments of this programme, not to limit this programme, all essences in this programme
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of this programme protection.
Claims (23)
1. a kind of voltage consistency detecting method, applied to the first battery system and the second electricity in multiple branch circuit batteries in parallel connection system
Cell system, which is characterized in that the described method includes:
Detect the voltage difference of first battery system Yu second battery system；
Detect the energy difference of first battery system Yu second battery system；
Based on the voltage difference and the energy difference, judge between first battery system and second battery system whether
Meet voltage consistency, wherein when meeting voltage consistency, first battery system and second battery system are carried out simultaneously
Connection；
Based on the voltage difference and the energy difference, judge between first battery system and second battery system whether
The step of meeting voltage consistency include:
If the voltage difference is greater than voltage difference threshold value, detect in both first battery system and second battery system
The electricity of high-pressure system variable resistance when being charged by variable resistance to the low-pressure system in described the two with constant current value
Resistance value；
Judge whether to meet voltage between first battery system and second battery system according to the resistance value consistent
Property.
2. the method according to claim 1, wherein according to the resistance value judge first battery system with
The step of whether meeting voltage consistency between second battery system include:
If the resistance value is greater than resistance value threshold value, judge not being inconsistent between first battery system and second battery system
Voltage consistency is closed, first battery system and second battery system are without parallel connection.
3. the method according to claim 1, wherein according to the resistance value judge first battery system with
The step of whether meeting voltage consistency between second battery system include:
If the resistance value is less than resistance value threshold value, the charging when high-pressure system directly charges to the low-pressure system is detected
Electric current；
Judge whether meet voltage one between first battery system and second battery system according to the charging current
Cause property.
4. according to the method described in claim 3, it is characterized in that, judging first battery system according to the charging current
The step of whether meeting voltage consistency between second battery system include:
If the charging current is greater than current threshold, judge not being inconsistent between first battery system and second battery system
Voltage consistency is closed, first battery system and second battery system are without parallel connection；
Alternatively, if the charging current is less than current threshold, judge first battery system and second battery system it
Between meet voltage consistency.
5. the method according to claim 1, wherein the voltage difference and the energy difference are based on, described in judgement
Whether meet voltage consistency between first battery system and second battery system, with the step of include:
If the voltage difference is less than voltage difference threshold value, judge to meet between first battery system and second battery system
Voltage consistency.
6. the method according to claim 1, wherein first battery system and second battery system two
At most having one in person is the battery system composed in parallel by more than two battery systems.
7. a kind of voltage consistency detection device, the first battery system and the second battery applied to multiple branch circuit batteries in parallel connection system
System, which is characterized in that described device includes:
Detection module, for detecting the voltage difference and energy difference of first battery system Yu second battery system；
Determining module judges first battery system and second electricity for being based on the voltage difference and the energy difference
Whether voltage consistency is met between cell system, wherein when meeting voltage consistency, first battery system and described second
Battery system carries out in parallel；
The determining module is used to judge first battery system and second electricity in the voltage difference and the energy difference
When whether meeting voltage consistency between cell system, it is specifically used for:
If the voltage difference is greater than voltage difference threshold value, detect in both first battery system and second battery system
The electricity of high-pressure system variable resistance when being charged by variable resistance to the low-pressure system in described the two with constant current value
Resistance value；
Judge whether to meet voltage between first battery system and second battery system according to the resistance value consistent
Property.
8. device according to claim 7, which is characterized in that the determining module is used to judge according to the resistance value
When whether meeting voltage consistency between first battery system and second battery system, it is specifically used for:
If the resistance value is greater than resistance value threshold value, judge not being inconsistent between first battery system and second battery system
Voltage consistency is closed, first battery system and second battery system are without parallel connection.
9. device according to claim 7, which is characterized in that the determining module is used to judge according to the resistance value
When whether meeting voltage consistency between first battery system and second battery system, it is specifically used for:
If the resistance value is less than resistance value threshold value, the charging electricity when high-pressure system charges to the low-pressure system is detected
Stream；
Judge whether meet voltage one between first battery system and second battery system according to the charging current
Cause property.
10. device according to claim 9, which is characterized in that the determining module is used for according to the charging current
Judge whether meet voltage consistency constantly between first battery system and second battery system, be specifically used for:
If the charging current is greater than current threshold, judge not being inconsistent between first battery system and second battery system
Voltage consistency is closed, first battery system and second battery system are without parallel connection；
Alternatively, if the charging current is less than current threshold, judge first battery system and second battery system it
Between meet voltage consistency, first battery system and second battery system carry out in parallel.
11. device according to claim 7, which is characterized in that the determining module be used for based on the voltage difference and
The energy difference, when judging whether to meet voltage consistency between first battery system and second battery system, tool
Body is used for:
If the voltage difference is less than voltage difference threshold value, judge to meet between first battery system and second battery system
Voltage consistency.
12. device according to claim 7, which is characterized in that first battery system and second battery system
At most having one in the two is the battery system composed in parallel by more than two battery systems.
13. a kind of voltage balancing method, applied to the first battery system and the second battery system of multiple branch circuit batteries in parallel connection system,
The voltage of first battery system is greater than the voltage of second battery system characterized by comprising
So that first battery system is charged with constant current value to second battery system by variable resistance, is denoted as first
Charging circuit；
Detect the resistance value of the variable resistance；
If the resistance value of the variable resistance is less than resistance value threshold value, first charging circuit is disconnected, first battery system is made
System directly charges to second battery system, is denoted as the second charging circuit, and detects the charging electricity of second charging circuit
Stream；
Judged whether to stop charging according to the charging current detected.
14. according to the method for claim 13, which is characterized in that judge whether to stop filling according to the charging current detected
The step of electricity, comprising:
If the charging current detected is greater than current threshold, continue that the first battery system is made to pass through second charging circuit to institute
State the charging of the second battery system；
Alternatively, stopping charging to second battery system if the charging current detected is less than current threshold.
15. according to the method for claim 13, which is characterized in that further include:
If the resistance value of the variable resistance is greater than the resistance value threshold value, continue that the first battery system is made to charge by described first
Circuit charges to the second battery system.
16. according to the method for claim 13, which is characterized in that first battery system and second battery system
At most having one in the two is the battery system composed in parallel by more than two battery systems.
17. the voltage balancing device between a kind of battery system, applied to multiple branch circuit batteries in parallel connection system the first battery system and
Second battery system, the voltage of first battery system are greater than the voltage of second battery system, which is characterized in that packet
It includes:
First charging module, for make first battery system by variable resistance with constant current value to second battery
System charging, is denoted as the first charging circuit；
Resistance value detection module, for detecting the resistance value of the variable resistance；
Second charging module when being less than resistance value threshold value for the resistance value in the variable resistance, disconnects the first charging electricity
Road makes first battery system directly charge to second battery system, is denoted as the second charging circuit, and detects described the
The charging current of two charging circuits；
Switch module, the charging current for being detected according to second charging module judge whether to stop charging.
18. device according to claim 17, which is characterized in that the switch module is according to the charging current detected
When judging whether to stop charging, it is specifically used for:
If the charging current detected is greater than current threshold, continue that the first battery system is made to pass through second charging circuit to institute
State the charging of the second battery system；
Alternatively, stopping charging to second battery system if the charging current detected is less than current threshold.
19. device according to claim 17, which is characterized in that further include:
Second switch module continues to make the first battery when being greater than the resistance value threshold value for the resistance value in the variable resistance
System is charged by first charging circuit to the second battery system.
20. device according to claim 17, which is characterized in that first battery system and second battery system
At most having one in the two is the battery system composed in parallel by more than two battery systems.
21. a kind of detection of battery system and equal balance system, which is characterized in that the system comprises voltage consistency detection devices
Voltage balancing device between battery system,
The voltage consistency detection device is any voltage consistency detection device in claim 7 to 12,
Voltage balancing device between the battery system is that the voltage between any battery system in claim 17 to 20 is equal
Weigh device.
22. detection and the equalizing circuit of a kind of battery system, which is characterized in that the circuit include first switch, second switch,
Variable resistance, controller, voltage detection device, current detecting equipment, anode interface, cathode interface, the voltage detection device
Both ends be connected respectively with the anode interface and the cathode interface, the current detecting equipment is connected with the second switch
Between the anode interface and the cathode interface, the series circuit and institute of the first switch and variable resistance composition
State second switch parallel connection, the first switch, the second switch, the variable resistance, the voltage detection device, the electricity
Flow assay device controller passes through low-voltage transmission line respectively and is connected with the controller, and the low-voltage transmission line is removed in the circuit
Other outer connecting lines are hv transmission line.
23. circuit according to claim 22, which is characterized in that the variable resistance is program-controlled load.
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| CN201710025756.5A CN106740228B (en) | 2017-01-13 | 2017-01-13 | Voltage consistency detection method and device and voltage equalization method and device |
| PCT/CN2017/093183 WO2018129894A1 (en) | 2017-01-13 | 2017-07-17 | Method and device for voltage consistency detection, and method and device for voltage balancing |
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| CN201710025756.5A CN106740228B (en) | 2017-01-13 | 2017-01-13 | Voltage consistency detection method and device and voltage equalization method and device |
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