CN108767947A - A kind of battery equalizing circuit - Google Patents
A kind of battery equalizing circuit Download PDFInfo
- Publication number
- CN108767947A CN108767947A CN201810986835.7A CN201810986835A CN108767947A CN 108767947 A CN108767947 A CN 108767947A CN 201810986835 A CN201810986835 A CN 201810986835A CN 108767947 A CN108767947 A CN 108767947A
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- CN
- China
- Prior art keywords
- battery
- switch
- equalizing circuit
- battery pack
- 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
- 230000005611 electricity Effects 0.000 claims description 13
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims 1
- 101001068634 Homo sapiens Protein PRRC2A Proteins 0.000 description 15
- 102100033954 Protein PRRC2A Human genes 0.000 description 15
- 101000908580 Homo sapiens Spliceosome RNA helicase DDX39B Proteins 0.000 description 13
- 102100024690 Spliceosome RNA helicase DDX39B Human genes 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910018095 Ni-MH Inorganic materials 0.000 description 2
- 229910018477 Ni—MH Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001052 transient effect Effects 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of battery equalizing circuit, battery includes the first battery unit being serially connected and the second battery pack, first battery unit includes multiple the first battery packs being sequentially connected in series, equalizing circuit includes the first balanced unit, second balanced unit and control unit, first balanced unit includes multiple first switch groups between being connected to each first battery pack the two poles of the earth and multiple first capacitances being connected between adjacent two first switches group, first switch group includes two first switches being serially connected, second balanced unit includes resistance, second switch, the transformer that external power supply and input terminal are connect with external power supply, transformer output end is connected between second battery pack the two poles of the earth, it is in parallel with transformer output end after resistance and second switch series connection.The present invention effectively separates instantaneous large-current and instantaneous pressure to protect equalizing circuit, and circuit is simple, at low cost.
Description
Technical field
The present invention relates to a kind of battery equalizing circuits.
Background technology
Battery in use, is often connected and/or used in parallel next to obtain higher voltage and more capacity
Meets the needs of load.But no matter Ni-MH battery, lead-acid battery or lithium battery cause because of the technological problems in production process
It there will necessarily be difference between battery cell.Although the production process of battery pack can carry out combo to single battery, contracted as possible with reaching
The purpose of baby battery group difference.But battery pack is after use, and after have passed through multiple charge and discharge cycles, battery cell difference can be by
Gradual change is big, gradually influences performance and the service life of battery pack.
Using battery equalizing circuit, electricity adjusting can be carried out to the charging and discharging process of battery, reach and improve old electricity
Pond group performance and the purpose for delaying cell damage speed.And currently used battery equalizing circuit has inductance type and condenser type, this
There is certain defect in two kinds of circuits：Condenser type equalizing circuit needs one group of capacitance in structure and is parallel on single battery,
Since capacitance can be equivalent to short circuit in transient process, such as when n capacitance serial connection charge, if assuming the 1st to the (n-1)th electricity
Hold for short circuit, then n-th of capacitance both end voltage will reach n times of original capacitance carrying voltage moment, eventually lead to n-th it is electric
It is excessively high to hold both end voltage, and when the effect acts on condenser type equalizing circuit, especially in the case where series-connected cell is more, pole
Easily lead to equalizing circuit overload damage；And inductive circuit is then complex and high cost, should not largely use.
Invention content
The purpose of the present invention is in view of the deficiencies of the prior art, proposing a kind of battery equalizing circuit, it is big effectively to separate moment
Electric current and instantaneous pressure are to protect equalizing circuit, and circuit is simple, at low cost.
The invention is realized by the following technical scheme：
A kind of battery equalizing circuit, battery include the first battery unit being serially connected and the second battery pack, the first battery
Unit includes multiple the first battery packs being sequentially connected in series, and equalizing circuit includes the first balanced unit, the second balanced unit and control
Unit, the first balanced unit include multiple first switch groups between being connected to each first battery pack the two poles of the earth and are separately connected
Multiple first capacitances between adjacent two first switches group, first switch group include two first switches being serially connected, and second
Balanced unit includes the transformer that resistance, second switch, external power supply and input terminal are connect with external power supply, transformer output end
It is connected between second battery pack the two poles of the earth, in parallel with transformer output end after resistance and second switch series connection, control unit is used for
The electricity of each first, second battery pack is detected, and controls the break-make of corresponding first switch and the second switch according to testing result, with
Make the electric quantity balancing of each first, second battery pack.
Further, the resistance is adjustable resistance.
Further, second balanced unit further includes diode, and diode anode connect with transformer output end, is cloudy
Pole is connect with second battery anode.
Further, first, second battery pack includes the battery of multiple series connection and/or parallel connection.
Further, the battery includes multiple first battery units and multiple second battery packs.
Further, two first switch includes the upper first switch and one end that one end is connect with the first battery electrode
The lower first switch being connect with the first battery anode, described control unit are that upper and lower first switch provides sequential complementation respectively
The first drive signal and the second drive signal.
Further, first balanced unit further includes multiple between being connected in parallel on each first battery pack the two poles of the earth respectively
Two capacitances.
Further, the external power supply includes super capacitor.
Further, first, second switch is metal-oxide-semiconductor either triode or IGBT.
Further, described control unit includes microcontroller, CPU or MCU.
The present invention has the advantages that：
1, the first balanced unit of the invention realizes that the electric quantity balancing between each first battery pack, the second balanced unit then make
The electric quantity balancing of the electricity of second battery pack and the first battery pack, the first capacitor charging moment of the first balanced unit, second
Weighing apparatus unit can realize high impedance status, separate the instantaneous large-current and instantaneous pressure of the appearance of the first capacitor charging moment, to
Equalizing circuit is protected, extends its service life, and the second battery pack quantity is less than the number of the first battery pack in the first balanced unit
Amount, i.e., only need that the second less balanced unit is arranged, at low cost to keep circuit of the present invention simple.
2, the resistance of the second balanced unit is adjustable resistance, and the resistance of resistance can be adjusted according to the second battery pack current electric quantity
Value, so as to shorten time for balance.
Description of the drawings
The present invention is described in further details below in conjunction with the accompanying drawings.
Fig. 1 is the circuit diagram of the present invention.
Wherein, the 1, first battery unit；2, control unit；3, external power supply.
Specific implementation mode
As shown in Figure 1, battery equalizing circuit is used to carry out electric quantity balancing to battery, battery includes two the first battery units
1 and two the second battery pack BAT2, the first battery unit 1 and the second battery pack BAT2 spaced series, the first battery unit 1 include
Three the first battery pack BAT1 being sequentially connected in series, equalizing circuit include two respectively with two first battery units 1 corresponding first
Balanced unit, two the second balanced unit corresponding with two second battery pack BAT2 and control units 2 respectively, the first balanced unit
Including be connected between each the two poles of the earth first battery pack BAT1 three first switch groups, be connected to adjacent two first and open
Two the first capacitance C1 between the group of pass and three the second capacitance C2 being connected in parallel between each the two poles of the earth first battery pack BAT1, first
Switching group includes two first switches being serially connected, and the second balanced unit includes adjustable resistance R, second switch K3, external power supply 3
With transformer T, transformer T input terminals are connect with external power supply 3, and transformer T output ends are connected to second the two poles of the earth battery pack BAT2
Between, it is in parallel with transformer T output ends after adjustable resistance R and second switch K3 series connection, control unit 2 respectively with each first battery
Group BAT1, each second battery pack BAT2, each first switch are connected with each second switch K3, for detecting each first battery pack BAT1
With the electricity of the second battery pack BAT2, and the break-make of corresponding first switch and the second switch K3 is controlled according to testing result, with
Make the electric quantity balancing of each first battery pack BAT1 and the second battery pack BAT2.
Second balanced unit further includes anti-backflow diode D, and diode D anodes are connect with transformer T output ends, cathode with
Second battery pack BAT2 anodes connect.
First battery pack BAT1 and the second battery pack BAT2 includes the battery of multiple series connection and/or parallel connection, which can
To be Ni-MH battery, lead-acid battery or lithium battery.
Two first switches include the upper first switch K1 and one end and first that one end is connect with the first battery pack BAT1 cathode
The lower first switch K2 of battery pack BAT1 anodes connection, control unit 2 are that upper first switch K1 and lower first switch K2 is carried respectively
For the first drive signal and the second drive signal of sequential complementation.
In the present embodiment, external power supply 3 includes super capacitor.Upper first switch K1, lower first switch K2 and second are opened
It is metal-oxide-semiconductor to close K3.Control unit 2 is microcontroller, concrete model AT89C51.Monolithic machine testing battery capacity and control
Metal-oxide-semiconductor action is the prior art.
Working principle of the invention is as follows：
Control unit 2 is controlled by the first drive signal and the second drive signal of sequential complementation in each first switch group
Upper first switch K1 and lower first switch K2 actions, to realize the electricity of each first battery pack BAT1 in the first battery unit 1
It is balanced；For the second battery pack BAT2, when the second battery pack BAT2 electricity is less than the first battery pack BAT1, control unit 2 is controlled
Second switch K3 processed is disconnected, and external power supply 3 charges to the second battery pack BAT2 so that its electricity increases, and works as the second battery pack
When BAT2 electricity is higher than the first battery pack BAT1, control unit 2 controls second switch K3 and is closed, and makes the second battery using resistance R
Group BAT2 discharges so that the reduction of its electricity, finally realizes that the electricity of each first battery pack BAT1 and each second battery pack BAT2 are equal
Weighing apparatus.
The foregoing is only a preferred embodiment of the present invention, therefore cannot be limited the scope of implementation of the present invention with this, i.e.,
According to equivalent changes and modifications made by scope of the present invention patent and description, it all should still belong to what patent of the present invention covered
In range.
Claims (10)
1. a kind of battery equalizing circuit, battery includes the first battery unit being serially connected and the second battery pack, the first battery list
Member includes multiple the first battery packs being sequentially connected in series, it is characterised in that：Equalizing circuit includes the first balanced unit, the second balanced list
Member and control unit, the first balanced unit include multiple first switch groups between being connected to each first battery pack the two poles of the earth and
Multiple first capacitances being connected between adjacent two first switches group, first switch group include that two first be serially connected open
It closes, the second balanced unit includes the transformer that resistance, second switch, external power supply and input terminal are connect with external power supply, transformation
Device output end is connected between second battery pack the two poles of the earth, control in parallel with transformer output end after resistance and second switch series connection
Unit is used to detect the electricity of each first, second battery pack, and controls corresponding first switch and the second switch according to testing result
Break-make so that the electric quantity balancing of each first, second battery pack.
2. a kind of battery equalizing circuit according to claim 1, it is characterised in that：The resistance is adjustable resistance.
3. a kind of battery equalizing circuit according to claim 1, it is characterised in that：Second balanced unit further includes two
Pole pipe, diode anode is connect with transformer output end, cathode is connect with second battery anode.
4. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：First, second battery
Group includes the battery of multiple series connection and/or parallel connection.
5. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：The battery includes multiple institutes
State the first battery unit and multiple second battery packs.
6. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：Two first switch includes
The lower first switch that the upper first switch and one end that one end is connect with the first battery electrode are connect with the first battery anode, institute
It is the first drive signal and the second drive signal that upper and lower first switch provides sequential complementation respectively to state control unit.
7. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：First balanced unit is also
Including multiple second capacitances being connected in parallel on respectively between each first battery pack the two poles of the earth.
8. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：The external power supply includes super
Grade capacitance.
9. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：First, second switch
It is metal-oxide-semiconductor either triode or IGBT.
10. a kind of battery equalizing circuit according to claim 1 or 2 or 3, it is characterised in that：Described control unit includes
Microcontroller, CPU or MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986835.7A CN108767947A (en) | 2018-08-28 | 2018-08-28 | A kind of battery equalizing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986835.7A CN108767947A (en) | 2018-08-28 | 2018-08-28 | A kind of battery equalizing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN108767947A true CN108767947A (en) | 2018-11-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810986835.7A Pending CN108767947A (en) | 2018-08-28 | 2018-08-28 | A kind of battery equalizing circuit |
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| Country | Link |
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| CN (1) | CN108767947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11258273B2 (en) * | 2019-05-10 | 2022-02-22 | Richtek Technology Corporation | Charger circuit and charging control method |
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|---|---|---|---|---|
| CN201113508Y (en) * | 2007-09-25 | 2008-09-10 | 深圳市比克电池有限公司 | Batteries equalizing device |
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2018
- 2018-08-28 CN CN201810986835.7A patent/CN108767947A/en active Pending
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| CN107317376A (en) * | 2017-08-08 | 2017-11-03 | 山东大学 | Series battery balanced device and its implementation based on star-like Switch capacitor structure |
| CN107579575A (en) * | 2017-10-20 | 2018-01-12 | 开沃新能源汽车集团有限公司 | Battery equalizing circuit and implementation method based on switch coupled capacitor |
| CN107968452A (en) * | 2017-11-15 | 2018-04-27 | 上海理工大学 | A kind of passive mixed equilibrium system and method for the master of lithium-ion-power cell group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11258273B2 (en) * | 2019-05-10 | 2022-02-22 | Richtek Technology Corporation | Charger circuit and charging control method |
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