CN108539816A - A kind of lithium battery module series equalizer - Google Patents
A kind of lithium battery module series equalizer Download PDFInfo
- Publication number
- CN108539816A CN108539816A CN201810370410.3A CN201810370410A CN108539816A CN 108539816 A CN108539816 A CN 108539816A CN 201810370410 A CN201810370410 A CN 201810370410A CN 108539816 A CN108539816 A CN 108539816A
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- converters
- battery module
- selecting switch
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 106
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- 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
-
- 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
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of lithium battery module series equalizers, including balanced device ontology, balanced device body interior is equipped with selecting switch unit, control unit MCU, first DC/DC converters, 2nd DC/DC converters and record display and warning device, selecting switch unit one end respectively with the first DC/DC converters, one end of 2nd DC/DC converters is electrically connected, record display is connected with warning device with the output end of control unit MCU, the output end of control unit MCU also respectively with selecting switch unit, first DC/DC converters, the control terminal of 2nd DC/DC converters is connected.The present invention realizes voltage, the electric current system-level between multiple serial lithium battery modules and does unified in due course dynamic fast uniform, and lithium battery system parameter real-time display is prompted with fault alarm, it simplifies lithium battery module itself design and maintenance is difficult, the cost and failure rate for reducing lithium battery system improve the discharge capacity and service life of lithium battery module.
Description
Technical field
The present invention relates to lithium battery system applied technical field more particularly to a kind of lithium battery module series equalizers.
Background technology
With advancing by leaps and bounds for lithium battery technology, lithium battery module (Pack) development and application is also more and more extensive, lithium battery
System is constituted by multiple lithium battery modules (Pack) are in series or in parallel, in lithium battery module train, to make lithium
Battery system plays better advantage, such as releases more electricity and possesses longer service life, it is necessary to allow battery modules it
Between voltage, electric current can effectively be equalized in time.And currently, the two-way DC/DC active equalization methods used, such as Fig. 1
It is shown, it needs the battery core group and lithium battery module in each lithium battery module management system (abbreviation BMU) to export positive and negative interpolar and increases
Add a two-way DC/DC system branch, cost is higher, and increases the failure rate of lithium battery system, influences in due course dynamic equalization
Rate, the heat dissipation and volume design requirement to lithium battery module itself are higher, more huge especially for lithium battery system
The projects such as large-scale energy-accumulating power station, thousands of lithium battery modules, maintenance is got up abnormal difficult, is also lacked display alarm in time and is carried
Show function, so that worker is wasted the plenty of time in maintenance, and inefficient.
Invention content
The technical issues of in the presence of the present invention mainly solution prior art, to provide a kind of in due course dynamic equalization speed
Fast, at low cost, with timely display alarm and fault cues function the lithium battery module series equalizer of rate.
The above-mentioned technical problem of the present invention is mainly to be addressed by following technical proposals：
Lithium battery module series equalizer provided by the invention, including balanced device ontology, the balanced device body interior according to
It is secondary be provided with selecting switch unit, control unit MCU, the first DC/DC converters, the 2nd DC/DC converters and record display with
Warning device, selecting switch unit one end are electrically connected with the output end of multiple lithium battery modules respectively, and the selection is opened
It closes the unit other end to be electrically connected with one end of the first DC/DC converters, the 2nd DC/DC converters respectively, described first
DC/DC converters, the 2nd DC/DC converters the other end be electrically connected respectively with lithium battery system busbar, the record is shown
Be connected with warning device with the output end of described control unit MCU, the output end of described control unit MCU also respectively with it is described
Selecting switch unit, the first DC/DC converters, the 2nd DC/DC converters control terminal be connected, described control unit MCU is defeated
Enter end to connect with the detection port communication of multiple lithium battery modules respectively, multiple lithium battery modules are sequentially connected in series company
It connects, and is electrically connected with the lithium battery system busbar.
Further, the record display includes recording display instrument, alarm and multiple indicator lights with warning device, described
Record display instrument, alarm and multiple indicator lights are connected with the output end of described control unit MCU respectively.
Further, the first DC/DC converters and the 2nd DC/DC converters are the identical directed energy transformation of structure
Device, and the energy conversion direction of the first DC/DC converters and the 2nd DC/DC converters is opposite, wherein the first DC/
DC converters are flowed for controlling energy from the lithium battery module to lithium battery system, and the 2nd DC/DC converters are used for
Control energy is flowed from lithium battery system to the lithium battery module.
Further, the selecting switch unit includes multiple selecting switch, and multiple selecting switch structures are identical, and
The quantity of the selecting switch is equal with the quantity of the lithium battery module, the quantity of indicator light one-to-one correspondence respectively.
Further, described control unit MCU is DSP or singlechip control chip.
Further, the selecting switch is that relay or metal-oxide-semiconductor switch.
The beneficial effects of the present invention are：By using a balanced device between multiple serial lithium battery modules, in system
Grade does unified equilibrium, without relying on the lithium battery module ability of equalization of itself, avoids in each lithium battery module management system
Battery core group and lithium battery module export positive and negative interpolar and increase the cumbersome of two-way DC/DC system branch, reduce to lithium electricity
The heat dissipation of pond module itself and volume design requirement, and reduce the cost and failure rate of lithium battery system；It is opened by selection
Pass unit, control unit MCU, the first DC/DC converters and the 2nd DC/DC converters realize between multiple lithium battery modules
The in due course dynamic fast uniform of voltage, electric current, improves the discharge capacity and service life of lithium battery module；Meanwhile record display with
Warning device realizes the lithium battery system parameter real-time display and fault alarm prompt facility of large-scale energy-accumulating power station, simplifies inspection
The complexity and difficulty repaiied, improve overhaul efficiency.In addition, structure of the invention is compact, reliability and maintainability is good.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the two-way DC/DC active equalization systems structural schematic diagram of lithium battery module therein；
Fig. 2 is the battery modules series equalizer structural schematic diagram of the present invention.
Specific implementation mode
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to fig. 1 shown in -2, lithium battery module series equalizer of the invention, including balanced device ontology 1, balanced device ontology
Selecting switch unit 2, control unit MCU 3, the first DC/DC converters 4, the 2nd DC/DC converters 5 are disposed with inside 1
With record display and warning device 6,2 one end of selecting switch unit is electrically connected with the output end of multiple lithium battery modules 7 respectively,
2 other end of selecting switch unit is electrically connected with one end of the first DC/DC converters 4, the 2nd DC/DC converters 5 respectively, and first
DC/DC converters 4, the 2nd DC/DC converters 5 the other end respectively with lithium battery system busbar 8 be electrically connected, record display with
Warning device 6 is connected with the output end of control unit MCU 3, the output end of control unit MCU3 also respectively with selecting switch list
First 2, the first DC/DC converters 4, the 2nd DC/DC converters 5 control terminal be connected, the control for receiving control unit MCU 3
Signal work processed；3 input terminals of control unit MCU are connect with the detection port communication of multiple lithium battery modules 7 respectively, are adopted respectively
The information parameter for collecting each lithium battery module 7 is compared analysis, then sends out corresponding work order to selecting switch unit 2,
One DC/DC converters 4, the work of the 2nd DC/DC converters 5；Multiple lithium battery modules 7 are sequentially connected in series, and with lithium battery system
Busbar 8 of uniting is electrically connected.In the present invention, it is preferred that control unit MCU 3 is DSP or singlechip control chip, is alternatively certainly
Other control devices help to improve automatic intelligent controlled level.
The present invention does unified equilibrium, nothing by using a balanced device between multiple serial lithium battery modules, system-level
The lithium battery module ability of equalization of itself need to be relied on, the battery core group and lithium battery in each lithium battery module management system are avoided
Module exports the cumbersome of one two-way DC/DC system branch of positive and negative interpolar increase, reduces the heat dissipation to lithium battery module itself
With volume design requirement, and the cost and failure rate of lithium battery system are reduced；Pass through selecting switch unit 2, control unit
It is suitable that MCU 3, the first DC/DC converters 4 and the 2nd DC/DC converters 5 realize voltage, electric current between multiple lithium battery modules
When dynamic fast uniform, improve the discharge capacity and service life of lithium battery module；Meanwhile it is real with warning device 6 to record display
The lithium battery system parameter for having showed large-scale energy-accumulating power station records display and fault alarm prompt facility in real time, simplifies answering for maintenance
It is miscellaneous and difficult, data record reference is provided for maintenance test, improves overhaul efficiency.In addition, structure of the invention is compact, reliably
Property and maintainability are good.
Specifically, record display and warning device 6 include record display instrument 61, alarm 62 and multiple indicator lights 63, note
Record display instrument 61, alarm 62 and multiple indicator lights 63 are connected with the output end of control unit MCU 3 respectively.In the present invention,
First, parameter informations (capacity or voltage) of the control unit MCU 3 of lithium battery module series equalizer to each lithium battery module 7
It is measured in real time with the parameter information (capacity or voltage) of lithium battery system, the parameter information detected is compared point
Analysis, and by the parameter information detected and analysis result be conveyed to record display instrument 61, record display instrument 61 receive signal into
Row record display in real time, observes adjustment convenient for staff and browses；Then, control unit MCU 3 sends out work order to appearance
The control terminal of amount or high lithium battery module 7 corresponding the selecting switch control terminal and the first DC/DC converters 4 of voltage, accordingly
Selecting switch and the first DC/DC converters 4 are started to work, at this point, the energy of capacity or the high lithium battery module 7 of voltage passes through the
One DC/DC converters 4 are transferred on lithium battery system busbar 8；At the same time, control unit MCU 3 sends out work order to appearance
The control terminal of amount or low lithium battery module 7 corresponding the selecting switch control terminal and the 2nd DC/DC converters 5 of voltage, accordingly
Selecting switch and the 2nd DC/DC converters 5 are started to work, electric to the lithium that capacity or voltage are low by the 2nd DC/DC converters 5
Pond module 7 charges；Finally, lithium battery module 7 is carried out by the first DC/DC converters 4 and the 2nd DC/DC converters 5
Real-time matching charge and discharge, to realize the dynamic equalization of lithium battery series mould set, balancing speed be decided by selecting switch unit 2,
The power of first DC/DC converters 4 and the 2nd DC/DC converters 5, user can replace as needed, be made with expanding
Use range.
When control unit MCU 3 detects parameter information (capacity or the electricity of a certain or multiple lithium battery modules 7 in real time
Pressure) when being unable to reach dynamic equalization value, control unit MCU 3 send out in time control instruction to alarm 62 carry out audio alert with
Staff is prompted, meanwhile, control unit MCU 3 issues instructions to corresponding indicator light 63 and is reminded into line flicker, consequently facilitating
Staff immediately finds problem, carries out timely Measuring error, improves the efficiency for solving failure problems, avoids the hair of accident
It is raw.
Specifically, the first DC/DC converters 4 and the 2nd DC/DC converters 5 are the identical directed energy converter of structure,
And the first DC/DC converters 4 and the 2nd DC/DC converters 5 energy conversion direction it is opposite, wherein the first DC/DC converters 4
It is flowed from battery modules 7 to lithium battery system for controlling energy, the 2nd DC/DC converters 5 are for controlling energy from lithium battery
System is flowed to battery modules 7.In the present invention, the first DC/DC converters 4 and the 2nd DC/DC converters 5 are alternatively two-way DC/
DC energy converters.
Specifically, selecting switch unit 2 includes multiple selecting switch, and multiple selecting switch structures are identical, it is preferred that selection
Switch is that relay or metal-oxide-semiconductor switch, and certainly or other equivalent controls switch；And the quantity of selecting switch is electric with lithium respectively
The quantity of pond module 7, the quantity of indicator light 63 one-to-one correspondence are equal, are conducive to control unit MCU 3 and realize to multiple lithium batteries
7 single control of module, is independent of each other, while detection failure being shown by corresponding indicator light 63, personnel easy to repair
Maintenance and inspection improve maintenance efficiency.
In the present invention, as illustrated in fig. 2, it is assumed that control unit MCU 3 detects that lithium battery module Pack1 capacity is higher than in real time
Other battery modules, and lithium battery module Pack3 capacity is less than other lithium battery modules, control unit MCU 3 conveys signal
Record display instrument 61, record display instrument 61 is given to receive signal and record and show in real time, at this time convenient for staff's observation
The state of lithium battery system；Meanwhile lithium battery module Pack1 is passed through choosing by the control unit MCU 3 of lithium battery series equalizer
It selects switch K1 to connect with the first DC/DC converters 4, the first DC/DC converters 4 of control put the energy of lithium battery module Pack1
Onto lithium battery system busbar 8.Meanwhile lithium battery module Pack3 is passed through selecting switch K3 and second by control unit MCU 3
DC/DC converters 5 connect, and the 2nd DC/DC converters 5 of control carry out lithium battery module Pack3 from lithium battery system busbar 8
Charging, to realize the dynamic equalization of lithium battery module Pack1 and lithium battery module Pack3, can efficiently and quickly realize more
Dynamic equalization between a series connection of lithium battery module 7, while independent of the ability of equalization of each lithium battery module itself.
More than, specific implementation mode only of the invention, but scope of protection of the present invention is not limited thereto, it is any without
The change or replacement that creative work is expected are crossed, should be covered by the protection scope of the present invention.Therefore, protection of the invention
Range should be determined by the scope of protection defined in the claims.
Claims (6)
1. a kind of lithium battery module series equalizer, including balanced device ontology (1), which is characterized in that the balanced device ontology (1)
Inside is disposed with selecting switch unit (2), control unit MCU (3), the first DC/DC converters (4), the 2nd DC/DC transformation
Device (5) and record display with warning device (6), described selecting switch unit (2) one end respectively with multiple lithium battery modules (7)
Output end be electrically connected, selecting switch unit (2) other end respectively with the first DC/DC converters (4), the 2nd DC/
One end of DC converters (5) is electrically connected, the first DC/DC converters (4), the 2nd DC/DC converters (5) the other end point
It is not electrically connected with lithium battery system busbar (8), the record display is with warning device (6) with described control unit MCU's (3)
Output end is connected, the output end of described control unit MCU (3) also respectively with the selecting switch unit (2), the first DC/DC
Converter (4), the 2nd DC/DC converters (5) control terminal be connected, described control unit MCU (3) input terminal respectively with it is multiple
The detection port communication of the lithium battery module (7) connects, and multiple lithium battery modules (7) are sequentially connected in series, and with institute
State lithium battery system busbar (8) electric connection.
2. lithium battery module series equalizer as described in claim 1, which is characterized in that the record display and warning device
(6) include record display instrument (61), alarm (62) and multiple indicator lights (63), the record display instrument (61), alarm
(62) it is connected respectively with the output end of described control unit MCU (3) with multiple indicator lights (63).
3. lithium battery module series equalizer as claimed in claim 2, which is characterized in that the first DC/DC converters (4)
It is the identical directed energy converter of structure with the 2nd DC/DC converters (5), and the first DC/DC converters (4) and second
The energy conversion direction of DC/DC converters (5) is opposite, wherein the first DC/DC converters (4) are for controlling energy from institute
It states lithium battery module (7) to flow to lithium battery system, the 2nd DC/DC converters (5) are for controlling energy from lithium battery system
It unites and is flowed to the lithium battery module (7).
4. lithium battery module series equalizer as claimed in claim 3, which is characterized in that selecting switch unit (2) packet
Include multiple selecting switch, multiple selecting switch structures are identical, and the quantity of the selecting switch respectively with the lithium battery
Quantity, the quantity of indicator light (63) of module (7) correspond equal.
5. lithium battery module series equalizer according to any one of claims 1-4, which is characterized in that described control unit
MCU (3) is DSP or singlechip control chip.
6. lithium battery module series equalizer as claimed in claim 4, which is characterized in that the selecting switch be relay or
Metal-oxide-semiconductor switchs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810370410.3A CN108539816A (en) | 2018-04-24 | 2018-04-24 | A kind of lithium battery module series equalizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810370410.3A CN108539816A (en) | 2018-04-24 | 2018-04-24 | A kind of lithium battery module series equalizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108539816A true CN108539816A (en) | 2018-09-14 |
Family
ID=63477555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810370410.3A Pending CN108539816A (en) | 2018-04-24 | 2018-04-24 | A kind of lithium battery module series equalizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN108539816A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115622200A (en) * | 2022-12-13 | 2023-01-17 | 麦田能源有限公司 | Voltage balancing method of battery pack, battery energy storage and power supply system and electronic device |
| CN115663978A (en) * | 2022-12-13 | 2023-01-31 | 麦田能源有限公司 | Battery energy storage power supply system, and voltage balancing method and device of battery pack |
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