CN110212609A - Battery pack equilibrium method and device based on wireless charging - Google Patents
Battery pack equilibrium method and device based on wireless charging Download PDFInfo
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- CN110212609A CN110212609A CN201910533412.4A CN201910533412A CN110212609A CN 110212609 A CN110212609 A CN 110212609A CN 201910533412 A CN201910533412 A CN 201910533412A CN 110212609 A CN110212609 A CN 110212609A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 138
- 239000000178 monomer Substances 0.000 claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
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- H02J7/0022—
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- H02J7/025—
Abstract
This application provides a kind of battery pack equilibrium method and device based on wireless charging, are related to technical field of battery management.Battery pack equilibrium method provided by the embodiments of the present application based on wireless charging, by the inclusion of the electric voltage equalization equipment of the first power conversion module and receiving coil, induced current can be generated in receiving coil, and the corresponding battery cell of the receiving coil is in voltage lower than under predeterminated voltage state, electric voltage equalization is carried out to the battery cell of electric voltage exception, so as to so that the voltage of the battery cell in battery pack is maintained at more balanced state.The battery pack equilibrium method uses the form of wireless charging, reduces the operation of connection charging circuit, improves the efficiency of battery balanced operation, reduces the workload of staff, operating process more secure and reliable, convenient for carrying out equilibrium treatment to battery in battery pack monomer.
Description
Technical field
This application involves field of battery management, in particular to a kind of battery pack equilibrium method based on wireless charging
And device.
Background technique
Electric energy as the widely used energy, more and more products using battery as energy source or use battery into
Row energy storage.For example, electric car uses battery pack as a source of power, generation of electricity by new energy station uses the battery storage sun
The electric energy that energy, wind energy generate.It is formed in series and parallel in these battery packs usually using multiple battery cells, and different battery cells
Since individual difference can have lack of uniformity in charging, discharge process, the inconsistency of each battery cell is caused, it is such
Inconsistency in use can impact the safety of integral battery group.Therefore, needing one kind can be realized battery pack
The solution of interior battery cell equilibrium.
Summary of the invention
In view of this, this application provides a kind of battery pack equilibrium method and device based on wireless charging.
Technical solution provided by the present application is as follows:
A kind of battery pack equilibrium method based on wireless charging, applied to the battery management system in battery pack balancing device
System, the battery pack balancing device are used to carry out multiple battery cells in battery pack electric voltage equalization, battery pack balancing dress
Setting further includes multiple first power conversion modules and multiple receiving coils, each first power conversion module respectively with one
The receiving coil and a battery cell connection, the electric energy for receiving the receiving coil are converted to described
The electric energy that battery cell charges；The battery management system is connect with each battery cell, the first power conversion module, institute
Stating battery pack equilibrium method includes:
Monitor whether the receiving coil senses electric current；
When having monitored that any one receiving coil senses electric current, detection can sense the receiving coil pair of electric current
The current voltage for the first object battery cell answered, determines whether the voltage of the first object battery cell is less than default electricity
Pressure；
If it is determined that the voltage of the first object battery cell is less than predeterminated voltage, the first object battery cell is controlled
Corresponding first power conversion module starts electric energy conversion, to charge to the first object battery cell.
Further, this method further include:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery is controlled
Corresponding first power conversion module of monomer stops electric energy conversion.
Further, first power conversion module includes rectifier and direct-flow inverter, and the rectifier is used for will
The alternating current that the receiving coil senses is converted to direct current, the direct-flow inverter and the rectifier and battery cell connects
It connects, the direct current for the rectifier to be converted to is converted to the charging current to the battery cell, when detecting
The voltage for stating first object battery cell restores to predeterminated voltage, controls corresponding first power supply of the first object battery cell
Conversion module stop electric energy conversion the step of include:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery is controlled
The corresponding direct-flow inverter of monomer stops electric energy conversion.
Further, the battery pack balancing device is configured with corresponding charging equipment, and the charging equipment includes second
Power conversion module and transmitting coil, the second source conversion module are used to the electric energy of external power supply being converted to alternating current,
The alternating current transmission that the second source conversion module is converted to by the transmitting coil is to each receiving coil.
Further, the battery pack balancing device includes circuit switching module, and the circuit switching module is respectively and often
A first power conversion module is connected with each battery cell, for controlling first power supply according to switching command
Conversion module is connected or disconnected with the current corresponding battery cell, and controls first power conversion module and other
The connection of battery cell, so that a battery cell is connect with one or more first power conversion modules, the battery pack
Equalization methods further include:
After all first object battery cell charging completes, determine low with the presence or absence of voltage in all battery cells
In the second target battery monomer of predeterminated voltage；
When determining there are when the second target battery monomer, switching command is generated, so that the circuit switching module will be described
Corresponding first power conversion module of first object battery cell is connected to the second target battery monomer.
Present invention also provides a kind of battery pack balancing device based on wireless charging, the battery pack balancing device is used for
Electric voltage equalization is carried out to multiple battery cells in battery pack, which includes battery management system, Duo Ge
One power conversion module and multiple receiving coils, each first power conversion module respectively with a receiving coil and
One battery cell connection, the electric energy for receiving the receiving coil, which is converted to, fills the battery cell
The electric energy of electricity；The battery management system is connect with each battery cell, the first power conversion module, the battery management system
For:
Monitor whether the receiving coil senses electric current；
When having monitored that any one receiving coil senses electric current, detection can sense the receiving coil pair of electric current
The current voltage for the first object battery cell answered, determines whether the voltage of the first object battery cell is less than default electricity
Pressure；
If it is determined that the voltage of the first object battery cell is less than predeterminated voltage, the first object battery cell is controlled
Corresponding first power conversion module starts electric energy conversion, to charge to the first object battery cell.
Further, the battery management system is also used to:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery is controlled
Corresponding first power conversion module of monomer stops electric energy conversion.
Further, first power conversion module includes rectifier and direct-flow inverter, and the rectifier is used for will
The alternating current that the receiving coil senses is converted to direct current, the direct-flow inverter and the rectifier and battery cell connects
It connects, the direct current for the rectifier to be converted to is converted to the charging current to the battery cell, the cell tube
Reason system is used for:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery is controlled
The corresponding direct-flow inverter of monomer stops electric energy conversion.
Further, the battery pack balancing device is configured with corresponding charging equipment, and the charging equipment includes second
Power conversion module and transmitting coil, the second source conversion module are used to the electric energy of external power supply being converted to alternating current,
The alternating current transmission that the second source conversion module is converted to by the transmitting coil is to each receiving coil.
Further, the battery pack balancing device further includes circuit switching module, the circuit switching module respectively with
Each first power conversion module is connected with each battery cell, for according to switching command control first electricity
Source conversion module is connected or disconnected with the current corresponding battery cell, and controls first power conversion module and its
The connection of his battery cell, so that a battery cell is connect with one or more first power conversion modules, the electricity
Pond management system is also used to:
After all first object battery cell charging completes, determine low with the presence or absence of voltage in all battery cells
In the second target battery monomer of predeterminated voltage；
When determining there are when the second target battery monomer, switching command is generated, so that the circuit switching module will be described
Corresponding first power conversion module of first object battery cell is connected to the second target battery monomer.
Battery pack equilibrium method provided by the embodiments of the present application based on wireless charging, by the inclusion of the first power supply modulus of conversion
The electric voltage equalization equipment of block and receiving coil can generate induced current, and the corresponding electricity of the receiving coil in receiving coil
Pond monomer is in voltage lower than under predeterminated voltage state, carries out electric voltage equalization to the battery cell of electric voltage exception, so as to so that
The voltage of battery cell in battery pack is maintained at more balanced state.The battery pack equilibrium method uses the shape of wireless charging
Formula reduces the operation of connection charging circuit, improves the efficiency of battery balanced operation, reduce the workload of staff, operates
Process more secure and reliable, convenient for carrying out equilibrium treatment to battery in battery pack monomer.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of schematic diagram of the battery pack balancing device based on wireless charging provided by the embodiments of the present application.
Fig. 2 is a kind of flow diagram of the battery pack equilibrium method based on wireless charging provided by the embodiments of the present application.
Fig. 3 is a kind of showing for battery pack balancing device and charging equipment based on wireless charging provided by the embodiments of the present application
It is intended to.
Fig. 4 is a kind of another schematic diagram of the battery pack balancing device based on wireless charging provided by the embodiments of the present application.
Icon: 100- battery pack balancing device；101- battery management system；The first power conversion module of 102-；103- connects
Take-up circle；104- circuit switching module；200- battery cell；300- charging equipment；301- second source conversion module；302- hair
Ray circle.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Ground description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Usually exist
The component of the embodiment of the present application described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed the application's to the detailed description of the embodiments herein provided in the accompanying drawings below
Range, but it is merely representative of the selected embodiment of the application.Based on embodiments herein, those skilled in the art are not being done
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile the application's
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
The embodiment of the present application provides a kind of battery pack equilibrium method based on wireless charging, applied to as shown in Figure 1
Battery management system 101 in battery pack balancing device 100, the battery pack balancing device 100 are used for multiple battery cells
200 carry out electric voltage equalization, which further includes multiple first power conversion modules 102 and multiple reception lines
Circle 103, the multiple battery cell 200 are connected, each first power conversion module 102 respectively with a reception line
Circle 103 and a battery cell 200 connect, and the electric energy for receiving the receiving coil 103 is converted to described
The electric energy that battery cell 200 charges.
In the embodiment of the present application, the electric energy that battery pack balancing device 100 can receive receiving coil 103 is to multiple
The lower battery cell 200 of voltage carries out electric voltage equalization in battery cell 200.Battery cell 200 in the embodiment of the present application can
Be electric car power battery in battery, the battery being also possible in energy storage device.Multiple battery cells 200 can go here and there
Connection connection forms battery pack, and battery management system 101 is connected with each battery cell 200, and battery management system 101 can be examined
Measure the electrical energy parameters such as the voltage of each battery cell 200.The quantity of the first power conversion module 102 in the embodiment of the present application
Can be identical with the quantity of battery cell 200, correspondingly, the number of the quantity of receiving coil 103 and the first power conversion module 102
Amount is also identical, and each battery cell 200 is configured with first power conversion module 102 and a receiving coil 103.
As shown in Fig. 2, the battery pack equilibrium method includes the following steps.
Step S101, monitors whether the receiving coil 103 senses electric current.
Electric voltage equalization in the embodiment of the present application is by way of wireless charging, and receiving coil 103 can be set at other
Induced current is induced under the influence of standby transmitting coil 302, staff is needing to carry out electric voltage equalization operation to battery pack
When, the equipment for having transmitting coil 302 can be used close to receiving coil 103, receiving coil 103 is made to induce induced current.
Battery management system 101 can be monitored each receiving coil 103, determine whether receiving coil 103 generates induced electricity
Stream.When having monitored that receiving coil 103 generates induced current, show have external wireless charging device 300 close to reception
Coil 103.At this point it is possible to carry out electric voltage equalization to the battery cell 200 in battery pack.
Step S102, when having monitored that any one receiving coil 103 senses electric current, detection can sense electric current
Corresponding first battery cell of receiving coil 103 current voltage, determine whether the voltage of first battery cell is less than
Predeterminated voltage.
In the actual operation process, wireless charging device 300 may be due to being arranged position, charge power, transmitting coil 302
It arranges the factors such as quantity, induction can not be formed to receiving coil 103 all in battery pack balancing device 100, so that battery pack
Only induced current can be generated in some receiving coil 103 in multiple receiving coils 103 in balancer 100.Cell tube
Reason system 101 can determine after having monitored that receiving coil 103 generates induced current and generate faradic receiving coil
103 are specifically identified, and according to the corresponding relationship of preconfigured receiving coil 103 and battery cell 200, determine that this is sensed
The current voltage of corresponding first battery cell of receiving coil 103 of electric current.It is understood that receiving coil 103 and battery
The corresponding relationship of monomer 200 can be correspondingly, i.e., a battery cell 200 is corresponding with unique receiving coil 103,
Exactly a battery cell 200 is corresponding with unique first power conversion module 102.Before carrying out electric voltage equalization, Mei Ge
One power conversion module 102 is just attached with corresponding battery cell 200, and battery management system 101 can determine each electricity
The corresponding receiving coil 103 of pond monomer 200.It has been determined in battery management system 101 and has generated faradic receiving coil 103
Afterwards, so that it may according to the corresponding relationship of pre-recorded receiving coil 103 and battery cell 200, detection and generation induced current
The voltage of the corresponding battery cell 200 of receiving coil 103 whether be less than predeterminated voltage.The numerical value of predeterminated voltage can be according to electricity
The actual conditions of pond group are set.
Step S103, however, it is determined that the voltage of first battery cell is less than predeterminated voltage, controls the first battery list
Corresponding first power conversion module 102 of body starts electric energy conversion, to charge to first battery cell.
If detecting the voltage of the first battery cell less than predeterminated voltage, at the voltage for showing first battery cell
In lower situation, battery management system 101 can continue to control corresponding first power conversion module of first battery cell
102 carry out electric energy conversion, and the first battery cell to voltage lower than predeterminated voltage charges.During the charging process, cell tube
Reason system 101 can be charged to voltage in the first battery cell and be reached default electricity with the voltage of the first battery cell of real-time detection
When pressure, battery management system 101 can control corresponding first power conversion module 102 of first battery cell and stop electric energy turn
It changes.
Detailed, first power conversion module 102 may include rectifier and direct-flow inverter, and the rectifier is used
Direct current, the direct-flow inverter and the rectifier and electricity are converted in the alternating current for sensing the receiving coil 103
Pond monomer 200 connects, and the direct current for the rectifier to be converted to is converted to the electricity of the charging to the battery cell 200
Stream.Battery management system 101 can be started to work or be stopped working by control direct-flow inverter to control to battery cell 200
Charging or stopping.
Rectifier can select small-power full-bridge rectifier, and the size of rectifier output voltage can be counted according to the following formula
It calculates:
US=j ω MIin
By rationally designing mutual inductance M, available suitable input voltage obtains direct current by rectification.DC inversion
Device can use buck circuit.
In another embodiment, as shown in figure 3, the battery pack balancing device 100 further includes charging equipment 300,
The charging equipment 300 includes second source conversion module 301 and transmitting coil 302, and the second source conversion module 301 is used
In the electric energy of external power supply is converted to alternating current, the transmitting coil 302 converts the second source conversion module 301
The alternating current transmission arrived is to each receiving coil 103.
The transmitting coil 302 being arranged in charging equipment 300 can be the biggish coil of coverage area, can be to multiple
Receiving coil 103, which is formed, to be influenced.Transmitting coil 302 is also possible to multiple lesser coils of independent coverage area, a transmitting
Coil 302, which can only be formed a receiving coil 103, to be influenced.The embodiment of the present application is not intended to limit the covering of transmitting coil 302
Range.In the structure using the corresponding multiple receiving coils 103 of a transmitting coil 302, transmitting coil 302 and receiving coil
103 can form string-serial type collocation structure, and the first power conversion module 102 can be used DC power conversion as alternating current
High-frequency inverter, for example, the alternating current that can be 100Hz by 48V power inverter can be selected, power is the high-frequency inversion of 500W
Device.The input/output relation of such inverter can be expressed with following formula:
Wherein, up (t) is output voltage, and Ud is input voltage, and α indicates that phase shifting angle, ω indicate switch angular frequency.
Using the mutual inductance coupling model principle of equal effects, can go here and there-serial type collocation structure abbreviation and keep the coupling coil on former secondary side harmonious
Capacitor shake all in resonant state, multi-load is equivalent to after primary side, the equivalent load of primary side can be made to increase.It is equivalent it
The output power Pin of high-frequency inverter can be calculated with following formula afterwards:
Wherein, R'LnFor RLnConvert the equivalent impedance before rectifier.If receiving coil more than 103, equivalent load
Impedance is increased more.Primary coil inductive current can decline, and receiving side power is caused to decline.In order to guarantee primary side inductive current
It is constant, make no matter to be arranged several receiving coils 103, the voltage of receiving side can balanced operation, primary side uses phase shift constant current control
System.Make the primary current of charging equipment 300 constant by adjusting the phase shifting angle numerical value in aforementioned formula.
As previously mentioned, in actual use, due to the facilities of charging equipment 300, so that battery pack balancing fills
It sets some receiving coil 103 in all receiving coils 103 in 100 and generates induced current.And generate induced electricity
The corresponding battery cell 200 of receiving coil 103 of stream may be in normal condition, and voltage is simultaneously not less than predeterminated voltage.And
It does not generate the corresponding battery cell 200 of faradic receiving coil 103 and is most likely in low-voltage state, in order to realize pair
The control that battery cell 200 more balances.As shown in figure 4, the battery pack balancing device 100 can also include circuit switching module
104, the circuit switching module 104 respectively with each first power conversion module 102 and each battery cell 200
Connection, for controlling first power conversion module 102 and the current corresponding battery cell 200 according to switching command
It connects or disconnects, and controls the connection of first power conversion module 102 and other battery cells 200, so that described in one
Battery cell 200 is connect with one or more first power conversion modules 102.
In the structure for being not provided with circuit switching module 104, each battery cell 200 is only corresponding with first power supply and turns
Block 102 is changed the mold, equally, a battery cell 200 is also only corresponding with a receiving coil 103.It in such a configuration, if should
Battery cell 200 is in the case where voltage is lower than predeterminated voltage, and the corresponding receiving coil 103 of battery cell 200 is not given birth to
At induced current, and other corresponding receiving coils 103 of battery cell 200 for being in normal condition generate induced current, by
In battery cell 200 and the one-to-one connection status of receiving coil 103, the battery cell 200 in abnormality can not
It charges.
After being provided with circuit switching module 104, circuit switching module 104 can be by first power conversion module
102 switch over the connection relationship of battery cell 200, and first power conversion module 102 is allow to pass through multiple batteries
Each of monomer 200 is all attached, and in order to simplify switching flow, circuit switching module 104 can control one first
Power conversion module 102 can only be connect within the same time with a battery cell 200.In this way, a battery cell 200 can
To be connect with any first power conversion module 102 in multiple first power conversion modules 102.
The battery pack equilibrium method is further comprising the steps of.
Step S104 determines whether deposit in all battery cells 200 after all first battery cell charging completes
It is lower than the second battery cell of predeterminated voltage in voltage.
Step S105 generates switching command, so that the circuit switching module when determining there are when the second battery cell
Corresponding first power conversion module 102 of first battery cell is connected to second battery cell by 104.
In the embodiment of the present application, the first battery cell is that the corresponding receiving coil 103 of battery cell 200 generates sense
Electric current is answered, as previously mentioned, in some cases, not all receiving coil 103 is ok in battery pack balancing device 100
Generate induced current.It is completed in the first battery cell by corresponding receiving coil 103 and corresponding first power conversion module 102
After charging, other do not generate the corresponding battery cell 200 of faradic receiving coil 103 be likely to be also in voltage it is low
In predeterminated voltage state.In the embodiment of the present application, the premise that whether there is the second battery cell in battery cell 200 is determined
It is that the first all battery cells is completed charging.After the first all battery cells all completes charging, battery management system
System 101 can traverse the information of voltage of all battery cells 200, determine whether there are still voltages in all battery cells 200
It is due to the second battery cell pair if still having such battery cell 200 lower than the second battery cell of predeterminated voltage
The receiving coil 103 answered also cannot timely be charged there is no induced current, the second battery cell is generated.
In the embodiment of the present application, make the first power conversion module 102 not only can be with by the way that circuit switching module 104 is arranged
It is connect with the battery cell 200 matched in advance, can also switch over and be connect with other battery cells 200.In all first electricity
After pond monomer all completes charging, if battery management system 101 is detected there are still the second battery cell,
Switching command is generated, control circuit switching module 104 carries out the first power conversion module 102 and 200 connection relationship of battery cell
Switching, corresponding first power conversion module 102 of the first battery cell is connected to the second battery cell.It is understood that
It is, in handoff procedure, if the quantity of corresponding first power conversion module 102 of the first battery cell is greater than the second target electricity
The quantity in pond can only switch the first power conversion module 102 of a part of first battery cell, can also be by all first
All switching is connected to the second battery cell to corresponding first power conversion module 102 of battery cell, so that the second all electricity
Pond monomer is all connected with chargeable first power conversion module 102, and the second battery cell of part is also connected with multiple
One power conversion module 102, so as to accelerate charging rate.If corresponding first power conversion module of the first battery cell
102 quantity less than the second battery cell quantity, by all corresponding first power conversion modules of the first battery cell
102 all switching be connected to the second battery cell after, still suffer from the second battery cell of part and be not connected with chargeable first
Battery is walked around module.At this point it is possible to completing charging to the second target battery of part and then carrying out one or many circuits to cut
It changes, so that the second all battery cells is all connected last chargeable first power conversion module 102, so that all
Second battery cell is all completed to charge.It is understood that can also be controlled to accelerate the charging rate of the second battery cell
Circuit switching module 104 makes second battery cell while connecting multiple chargeable first power conversion modules 102, makes this
Second battery cell can carry out quick charge.It is understood that needing to consider when charging to battery cell 200
The maximum charging current that battery cell 200 is able to bear, and all chargeable first power supplys for connecting the battery cell 200
The sum of charging current of conversion module 102 is no more than maximum charging current, to guarantee the safety of electric current monomer.
In the embodiment of the present application, the first power conversion module 102 is connected to the battery cell 200 matched in advance, only
After the first all battery cells is completed charging, the circuit switching of the first power conversion module 102 is just carried out.By setting
Circuits switching module 104, so that the first power conversion module 102 can not only be connect with the battery cell 200 matched in advance,
Can also after the first battery cell completes charging, and when still having lower second battery cell of other voltages in battery pack,
It is switched to and is connect with the second battery cell, so as to so that voltage all in battery pack is lower than the battery cell of predeterminated voltage
200 can be electrically charged, without being limited by the quantity that can generate faradic receiving coil 103.
In conclusion the battery pack equilibrium method provided by the embodiments of the present application based on wireless charging, by the inclusion of first
The electric voltage equalization equipment of power conversion module 102 and receiving coil 103 can generate induced current in receiving coil 103, and
The corresponding battery cell 200 of receiving coil 103 is in voltage and is lower than under predeterminated voltage state, to the battery cell of electric voltage exception
200 carry out electric voltage equalization, so as to so that the voltage of the battery cell 200 in battery pack is maintained at more balanced state.The electricity
Pond group equalization methods use the form of wireless charging, reduce the operation of connection charging circuit, improve the effect of battery balanced operation
Rate reduces the workload of staff, operating process more secure and reliable, convenient for carrying out equilibrium to battery in battery pack monomer 200
Processing.
Present invention also provides a kind of battery pack balancing device based on wireless charging, the battery pack balancing device is used for
Electric voltage equalization is carried out to multiple battery cells in battery pack, which includes battery management system, Duo Ge
One power conversion module and multiple receiving coils, each first power conversion module respectively with a receiving coil and
One battery cell connection, the electric energy for receiving the receiving coil, which is converted to, fills the battery cell
The electric energy of electricity；The battery management system is connect with each battery cell, the first power conversion module, the battery management system
For:
Monitor whether the receiving coil senses electric current；
When having monitored that any one receiving coil senses electric current, detection can sense the receiving coil pair of electric current
The current voltage for the first object battery cell answered, determines whether the voltage of the first object battery cell is less than default electricity
Pressure；
If it is determined that the voltage of the first object battery cell is less than predeterminated voltage, the first object battery cell is controlled
Corresponding first power conversion module starts electric energy conversion, to charge to the first object battery cell.
Further, the battery management system is also used to:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery is controlled
Corresponding first power conversion module of monomer stops electric energy conversion.
Further, first power conversion module includes rectifier and direct-flow inverter, and the rectifier is used for will
The alternating current that the receiving coil senses is converted to direct current, the direct-flow inverter and the rectifier and battery cell connects
It connects, the direct current for the rectifier to be converted to is converted to the charging current to the battery cell, the cell tube
Reason system is used for:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery is controlled
The corresponding direct-flow inverter of monomer stops electric energy conversion.
Further, the battery pack balancing device is configured with corresponding charging equipment, and the charging equipment includes second
Power conversion module and transmitting coil, the second source conversion module are used to the electric energy of external power supply being converted to alternating current,
The alternating current transmission that the second source conversion module is converted to by the transmitting coil is to each receiving coil.
Further, the battery pack balancing device further includes circuit switching module, the circuit switching module respectively with
Each first power conversion module is connected with each battery cell, for according to switching command control first electricity
Source conversion module is connected or disconnected with the current corresponding battery cell, and controls first power conversion module and its
The connection of his battery cell, so that a battery cell is connect with one or more first power conversion modules, the electricity
Pond management system is also used to:
After all first object battery cell charging completes, determine low with the presence or absence of voltage in all battery cells
In the second target battery monomer of predeterminated voltage；
When determining there are when the second target battery monomer, switching command is generated, so that the circuit switching module will be described
Corresponding first power conversion module of first object battery cell is connected to the second target battery monomer.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application should be based on the protection scope of the described claims.
Claims (10)
1. a kind of battery pack equilibrium method based on wireless charging, which is characterized in that applied to the electricity in battery pack balancing device
Pond management system, the battery pack balancing device are used to carry out electric voltage equalization, the battery to multiple battery cells in battery pack
Group balancer further includes multiple first power conversion modules and multiple receiving coils, each first power conversion module point
It is not connect with a receiving coil and a battery cell, the electric energy conversion for receiving the receiving coil
For the electric energy to charge to the battery cell；The battery management system and each battery cell, the first power supply modulus of conversion
Block connection, the battery pack equilibrium method include:
Monitor whether the receiving coil senses electric current；
When having monitored that any one receiving coil senses electric current, detection can sense that the receiving coil of electric current is corresponding
The current voltage of first object battery cell, determines whether the voltage of the first object battery cell is less than predeterminated voltage；
If it is determined that the voltage of the first object battery cell is less than predeterminated voltage, it is corresponding to control the first object battery cell
The first power conversion module start electric energy conversion, to charge to the first object battery cell.
2. the battery pack equilibrium method according to claim 1 based on wireless charging, which is characterized in that this method is also wrapped
It includes:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery cell is controlled
Corresponding first power conversion module stops electric energy conversion.
3. the battery pack equilibrium method according to claim 2 based on wireless charging, which is characterized in that first power supply
Conversion module includes rectifier and direct-flow inverter, and the alternating current that the rectifier is used to sense the receiving coil is converted
For direct current, the direct-flow inverter is connect with the rectifier and battery cell, for be converted to the rectifier
Direct current is converted to the charging current to the battery cell, when the voltage for detecting the first object battery cell restore to
Predeterminated voltage controls the step of corresponding first power conversion module of the first object battery cell stops electric energy conversion packet
It includes:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery cell is controlled
Corresponding direct-flow inverter stops electric energy conversion.
4. the battery pack equilibrium method according to claim 1 based on wireless charging, which is characterized in that the battery pack is equal
The device that weighs is configured with corresponding charging equipment, and the charging equipment includes second source conversion module and transmitting coil, and described the
Two power conversion modules are used to the electric energy of external power supply being converted to alternating current, and the transmitting coil converts the second source
The alternating current transmission that module is converted to is to each receiving coil.
5. the battery pack equilibrium method according to claim 1 based on wireless charging, which is characterized in that the battery pack is equal
Weigh device include circuit switching module, the circuit switching module respectively with each first power conversion module and each institute
Battery cell connection is stated, for controlling first power conversion module and the current corresponding battery list according to switching command
Body connects or disconnects, and controls the connection of first power conversion module and other battery cells, so that an electricity
Pond monomer is connect with one or more first power conversion modules, the battery pack equilibrium method further include:
After all first object battery cell charging completes, determine in all battery cells with the presence or absence of voltage lower than pre-
If the second target battery monomer of voltage；
Exist when the second target battery monomer when determining, generation switching command, so that the circuit switching module is by described first
Corresponding first power conversion module of target battery monomer is connected to the second target battery monomer.
6. a kind of battery pack balancing device based on wireless charging, which is characterized in that the battery pack balancing device is used for electricity
Multiple battery cells of Chi Zuzhong carry out electric voltage equalization, which includes battery management system, multiple first electricity
Source conversion module and multiple receiving coils, each first power conversion module respectively with a receiving coil and one
Battery cell connection, the electric energy for receiving the receiving coil, which is converted to, charges to the battery cell
Electric energy；The battery management system is connect with each battery cell, the first power conversion module, and the battery management system is used
In:
Monitor whether the receiving coil senses electric current；
When having monitored that any one receiving coil senses electric current, detection can sense that the receiving coil of electric current is corresponding
The current voltage of first object battery cell, determines whether the voltage of the first object battery cell is less than predeterminated voltage；
If it is determined that the voltage of the first object battery cell is less than predeterminated voltage, it is corresponding to control the first object battery cell
The first power conversion module start electric energy conversion, to charge to the first object battery cell.
7. the battery pack balancing device according to claim 6 based on wireless charging, which is characterized in that the battery management
System is also used to:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery cell is controlled
Corresponding first power conversion module stops electric energy conversion.
8. the battery pack balancing device according to claim 6 based on wireless charging, which is characterized in that first power supply
Conversion module includes rectifier and direct-flow inverter, and the alternating current that the rectifier is used to sense the receiving coil is converted
For direct current, the direct-flow inverter is connect with the rectifier and battery cell, for be converted to the rectifier
Direct current is converted to the charging current to the battery cell, and the battery management system is used for:
When the voltage for detecting the first object battery cell restores to predeterminated voltage, the first object battery cell is controlled
Corresponding direct-flow inverter stops electric energy conversion.
9. the battery pack balancing device according to claim 8 based on wireless charging, which is characterized in that the battery pack is equal
The device that weighs is configured with corresponding charging equipment, and the charging equipment includes second source conversion module and transmitting coil, and described the
Two power conversion modules are used to the electric energy of external power supply being converted to alternating current, and the transmitting coil converts the second source
The alternating current transmission that module is converted to is to each receiving coil.
10. the battery pack balancing device according to claim 6 based on wireless charging, which is characterized in that the battery pack
Balancer further includes circuit switching module, the circuit switching module respectively with each first power conversion module and every
A battery cell connection, for controlling first power conversion module and the current corresponding electricity according to switching command
Pond monomer connects or disconnects, and controls the connection of first power conversion module and other battery cells, so that an institute
It states battery cell to connect with one or more first power conversion modules, the battery management system is also used to:
After all first object battery cell charging completes, determine in all battery cells with the presence or absence of voltage lower than pre-
If the second target battery monomer of voltage；
Exist when the second target battery monomer when determining, generation switching command, so that the circuit switching module is by described first
Corresponding first power conversion module of target battery monomer is connected to the second target battery monomer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533412.4A CN110212609A (en) | 2019-06-19 | 2019-06-19 | Battery pack equilibrium method and device based on wireless charging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533412.4A CN110212609A (en) | 2019-06-19 | 2019-06-19 | Battery pack equilibrium method and device based on wireless charging |
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| CN110212609A true CN110212609A (en) | 2019-09-06 |
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| CN201910533412.4A Pending CN110212609A (en) | 2019-06-19 | 2019-06-19 | Battery pack equilibrium method and device based on wireless charging |
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| CN111030230A (en) * | 2019-12-23 | 2020-04-17 | 南京理工大学 | Battery pack balancing device based on wireless electric energy transmission technology |
| CN112104034A (en) * | 2020-09-14 | 2020-12-18 | 北京理工大学 | Non-contact power battery charging, heating and balancing device |
| CN112421716A (en) * | 2020-11-09 | 2021-02-26 | 西南交通大学 | Battery pack balance control circuit and method based on wireless charger |
| CN114336805A (en) * | 2020-09-30 | 2022-04-12 | 比亚迪股份有限公司 | Battery pack charging device and charging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111030230A (en) * | 2019-12-23 | 2020-04-17 | 南京理工大学 | Battery pack balancing device based on wireless electric energy transmission technology |
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| CN112104034A (en) * | 2020-09-14 | 2020-12-18 | 北京理工大学 | Non-contact power battery charging, heating and balancing device |
| CN112104034B (en) * | 2020-09-14 | 2023-04-07 | 北京理工大学 | Non-contact power battery charging, heating and balancing device |
| CN114336805A (en) * | 2020-09-30 | 2022-04-12 | 比亚迪股份有限公司 | Battery pack charging device and charging method |
| CN112421716A (en) * | 2020-11-09 | 2021-02-26 | 西南交通大学 | Battery pack balance control circuit and method based on wireless charger |
| CN112421716B (en) * | 2020-11-09 | 2022-08-19 | 西南交通大学 | Battery pack equalization control circuit and method based on wireless charger |
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