CN205622249U - 2n group battery equalizer circuit who easily expands - Google Patents
2n group battery equalizer circuit who easily expands Download PDFInfo
- Publication number
- CN205622249U CN205622249U CN201620082683.4U CN201620082683U CN205622249U CN 205622249 U CN205622249 U CN 205622249U CN 201620082683 U CN201620082683 U CN 201620082683U CN 205622249 U CN205622249 U CN 205622249U
- Authority
- CN
- China
- Prior art keywords
- battery
- battery pack
- mosfet
- outfan
- source electrode
- 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.)
- Expired - Fee Related
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a 2n group battery equalizer circuit who easily expands guarantees that battery cell in the group battery crosses to fill at charging and discharging in -process disappearance to put with crossing, improves the unbalanced phenomenon of series battery, the life of extension group battery, and the A series of cells more than easily expanding to more. Including battery pack module and equalizer circuit module, battery pack module comprises a 2n A series of cells, and per 2 batteries are a group, the battery monomer from top to bottom respectively the name for B0a, B0b, B1a, B1b,. B (n 1 )A, B (n 1 )B, n=1, 2 wherein,. Infinity, the equalizer circuit module includes that base part divides and the extension portion branch, base part divides by battery B0a, B0b, inductance L0 and MOSFET switch tube S0a, S0b constitutes, wherein B0a and B0b series connection, B0a's negative pole links to each other with L0 one end, L0's the other end and S0a's source electrode, S0b's drain electrode links to each other, S0a's drain electrode links to each other with the anodal of B0a, S0b's source electrode links to each other with B0b's negative pole, extension portion divides by battery bma, bmb and the extension sub circuit that corresponds are constituteed, M=1 wherein, 2, , N 1.
Description
Technical field
This utility model relates to the battery management system field of hybrid vehicle, pure electric automobile or energy storage equipment, special
Do not relate to a kind of 2n circuit of battery pack balancing being prone to extension.
Background technology
In recent years, along with going from bad to worse and petroleum resources gradually deficient of air quality, low emission, low oil consumption new
Type electric automobile becomes the exploitation focus of Ge great motor corporation of the world today.Power battery pack is as the crucial portion of electric automobile
Part, has significant impact to car load dynamic property, economy and safety.Power battery pack after multiple charge and discharge cycles,
The distribution of the residual capacity of each battery cell substantially there will be three kinds of situations: the residual capacity of Individual cells monomer is higher；Individually
The residual capacity of battery cell is on the low side；Higher and Individual cells monomer the residual capacity of residual capacity of Individual cells monomer is inclined
Low.Consequently, it is possible in actual use, set of cells service life will be had a strong impact on, and easily occur overcharging and crossing putting phenomenon.
For above-mentioned three kinds of situations, in order to improve the problem of inconsistency of set of cells, improve the overall performance of set of cells, then
Need to use Balance route.The method of Li-ion batteries piles Balance route, disappears to energy according to circuit in balancing procedure at present
Consumption situation, can be divided into energy-dissipating and the big class of energy non-dissipative type two；According to equalization function classify, can be divided into charge balancing,
Equalization discharge and dynamic equalization.Charge balancing refers to the equilibrium in charging process, is usually and reaches at batteries monomer voltage
Start equilibrium during setting value, prevent overcharge by reducing charging current；Equalization discharge refers to the equilibrium in discharge process, logical
Cross and supplement energy to prevent overdischarge to the battery cell that dump energy is low；Dynamic equalization mode combines charge balancing and electric discharge
The advantage of equilibrium, refers to the equilibrium carried out set of cells in whole charge and discharge process.
Utility model content
The purpose of this utility model is that the shortcoming overcoming prior art is with not enough, it is provided that a kind of 2n battery being prone to extension
Group equalizing circuit, ensures that the cell in set of cells occurs without to overcharge and cross during charging and discharging and puts, and improves string
The connection unbalanced phenomenon of set of cells, extends the service life of set of cells, and easily scales to the series connection of more battery.Its feature exists
In, when needs increase series-connected cell number, every 2 batteries are a small group, only just can connect with interpolation one extension electronic circuit
On original circuit, and primary circuit will not be impacted.In charge and discharge process, first equalize is the list in each group
Body battery, then equalizes each group, finally realizes the balancing energy of whole Battery pack.
The purpose of this utility model is achieved through the following technical solutions: a kind of 2n circuit of battery pack balancing being prone to extension,
Including battery module and equalizing circuit module；Described battery module is composed in series by 2n battery, and every 2 batteries are one little
Group, battery cell is from top to bottom respectively designated as B0a、B0b、B1a、B1b、……、B(n-1)a、B(n-1)b, n=1,2 ... ∞, described
Equalizing circuit module includes base component and expansion, and base component is by battery B0a、B0b, inductance L0With switch mosfet pipe
S0a、S0bComposition, wherein B0aWith B0bIt is connected in series, B0aNegative pole and L0One end is connected, L0The other end and S0aSource electrode, S0b's
Drain electrode is connected, S0aDrain electrode and B0aPositive pole be connected, S0bSource electrode and B0bNegative pole be connected, expansion is by battery Bma、Bmb
And the extension electronic circuit composition of correspondence, wherein m=1,2 ..., n-1.
Described battery module is secondary cell, including lithium ion battery, lead-acid battery, ultracapacitor or ni-mh electricity
Pond.
The quantity of described extension electronic circuit is n-1；Each extension electronic circuit by the MOSFET of four band fly-wheel diodes with
And two energy storage inductor L are constituted, with this Battery pack Bma、BmbThe upper brachium pontis MOSFET being connected is Sma, lower brachium pontis MOSFET be
Smb, inductance be Lma, the upper brachium pontis MOSFET connecting a upper Battery pack and this Battery pack is Smc, lower brachium pontis MOSFET be Smd, inductance
For Lmb, described SmaSource electrode and SmbDrain electrode and energy storage inductor LmaOne end be connected；LmaThe other end as outfan c, Sma
Drain electrode as outfan b, SmbSource electrode as outfan d, SmcSource electrode and SmdDrain electrode and energy storage inductor LmbOne end phase
Even, LmbThe other end and SmaDrain electrode be connected, SmdSource electrode and SmbSource electrode be connected, SmcDrain electrode as outfan a, output
An end a and upper Battery pack B(m-1)aPositive pole be connected, outfan b and this Battery pack BmaPositive pole be connected, outfan c and BmbJust
The most connected, outfan d and BmbNegative pole be connected, the grid of MOSFET is all connected with control circuit, make MOSFET open with
Turn off by control circuit control.
The size of the frequency of described control circuit control signal should according to the inductance value of the circuit energy storage inductor controlled,
Depending on the switching loss of MOSFET, battery cell voltage, battery cell capacity.
The dutycycle of the output drive signal of described control circuit at least should can make energy storage inductor L within each signal period
Resetting, i.e. in a switch periods, the electric current of energy storage inductor the most all have to drop to zero.
Described base component is in charge and discharge process, if battery B0aTerminal voltage compare B0bTerminal voltage high, in order to avoid B0a
Overcharge or B0bCross and put, in a PWM cycle, make B0aCorresponding upper brachium pontis MOSFET S0aConducting, then electric current passes through B0a、S0a
And L0, B0aElectric discharge is L0Store energy；S0aTurning it off after conducting certain time, now electric current passes through B0bCorresponding lower brachium pontis
MOSFET S0bFly-wheel diode, L0And B0b, L0Release energy to B0b, it is achieved that energy is from B0aTo B0bTransfer.
Described extension electronic circuit is in charge and discharge process, if battery BmaTerminal voltage compare BmbTerminal voltage high, in order to avoid
BmaOvercharge or BmbCross and put, in a PWM cycle, make BmaCorresponding upper brachium pontis MOSFET SmaConducting, then electric current passes through Bma、
SmaAnd Lma, BmaElectric discharge is LmaStore energy；SmaTurning it off after conducting certain time, now electric current passes through BmbUnder Dui Ying
Brachium pontis MOSFET SmbFly-wheel diode, LmaAnd Bmb, LmaRelease energy to Bmb, it is achieved that energy is from BmaTo BmbTransfer；
After battery in equilibrium complete primary school group, then compare the terminal voltage of this little Battery pack and upper a small group battery, if the end of little Battery pack
Voltage higher than the terminal voltage of upper a small group battery, then, in a PWM cycle, makes the lower brachium pontis MOSFET that this little Battery pack is corresponding
SmdConducting, then electric current passes through this little Battery pack Bma、Bmb、LmbAnd Smd, Bma、BmbElectric discharge is LmbStore energy, SmdConducting is certain
Turning it off after time, now electric current is by upper brachium pontis MOSFETS corresponding to upper a small group batterymcFly-wheel diode, LmbWith
And B(m-1)a、B(m-1)b, LmbRelease energy, to B(m-1)a、B(m-1)bCharging, it is achieved that energy from this little Battery pack to upper a small group
The transfer of battery.
Compared with prior art this utility model uses above-mentioned two-way the most equal in series battery cells management system
Weighing apparatus technology, can guarantee that each battery occurs without to overcharge and cross during charging and discharging and puts phenomenon, improve series battery not
The problem of equilibrium, extends the service life of set of cells, and is prone to extend series-connected cell number.
Accompanying drawing explanation
Fig. 1 is the equalizing circuit schematic diagram as a example by 6 batteries.
Fig. 2 is extension electronic circuit schematic diagram.
Fig. 3 is the work process schematic diagram of base component.
Fig. 4 is the work process schematic diagram of expansion.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but enforcement of the present utility model
Mode is not limited to this.
A kind of 2n circuit of battery pack balancing being prone to extension, it is characterised in that include battery module and equalizing circuit mould
Block；Described battery module is composed in series by 2n battery, and every 2 batteries are a small group, and battery cell is ordered the most respectively
Entitled B0a、B0b、B1a、B1b、……、B(n-1)a、B(n-1)b, described equalizing circuit module includes base component and expansion, basis
Part is by battery B0a、B0b, inductance L0With switch mosfet pipe S0a、S0bComposition, wherein B0aWith B0bIt is connected in series, B0aNegative pole with
L0One end is connected, L0The other end and S0aSource electrode, S0bDrain electrode be connected, S0aDrain electrode and B0aPositive pole be connected, S0bSource electrode
With B0bNegative pole be connected, expansion is by battery Bma、BmbAnd the extension electronic circuit composition of correspondence, wherein m=1,2 ...,
N-1, n=1,2 ... ∞.
If Fig. 1 is the equalizing circuit schematic diagram as a example by 6 batteries.Wherein, series battery is by 6 batteries series connection groups
Becoming, every 2 batteries are a small group, and battery cell is from top to bottom respectively designated as B0a、B0b、B1a、B1b、B2a、B2b.Battery pack balancing
Circuit is divided into base component and expansion.Base component is by battery B0a、B0b, inductance L0With switch mosfet pipe S0a、S0bGroup
Becoming, expansion is by battery B1a、B1b、B2a、B2bAnd the extension electronic circuit composition of correspondence.B1a、B1bCorresponding extension electronic circuit
Including switch mosfet pipe S1a、S1b、S1c、S1dAnd inductance is L1a、L1b。B2a、B2bCorresponding extension electronic circuit includes MOSFET
Switching tube S2a、S2b、S2c、S2dAnd inductance is L2a、L2b。
If Fig. 2 is extension electronic circuit schematic diagram.Each extension electronic circuit by four band fly-wheel diodes MOSFET and
Two energy storage inductor L are constituted, with this Battery pack Bma、BmbThe upper brachium pontis MOSFET being connected is Sma, lower brachium pontis MOSFET be Smb、
Inductance is Lma, the upper brachium pontis MOSFET connecting a upper Battery pack and this Battery pack is Smc, lower brachium pontis MOSFET be Smd, inductance be
Lmb。SmaSource electrode and SmbDrain electrode and energy storage inductor LmaOne end be connected.LmaThe other end as outfan c, SmaDrain electrode
As outfan b, SmbSource electrode as outfan d, SmcSource electrode and SmdDrain electrode and energy storage inductor LmbOne end be connected,
LmbThe other end and SmaDrain electrode be connected, SmdSource electrode and SmbSource electrode be connected, SmcDrain electrode as outfan a.Outfan a
With a upper Battery pack B(m-1)aPositive pole be connected, outfan b and this Battery pack BmaPositive pole be connected, outfan c and BmbPositive pole
It is connected, outfan d and BmbNegative pole be connected.The grid of MOSFET is all connected with control circuit, makes opening and closing of MOSFET
Disconnected by control circuit control.
If Fig. 3 is the work process schematic diagram of base component.In charge and discharge process, if battery B0aTerminal voltage compare B0b
Terminal voltage high, in order to avoid B0aOvercharge or B0bCross and put, in a PWM cycle, make B0aCorresponding upper brachium pontis MOSFET S0a
Conducting, then electric current passes through B0a、S0aAnd L0, B0aElectric discharge is L0Store energy；S0aTurn it off, now after conducting certain time
Electric current passes through B0bCorresponding lower brachium pontis MOSFET S0bFly-wheel diode, L0And B0b, L0Release energy to B0b, it is achieved that energy
Amount is from B0aTo B0bTransfer.
As in Fig. 4, two figures are the work process schematic diagrams of expansion.Wherein with oneself this Battery pack B1a、B1bIt is connected
The upper brachium pontis MOSFET S connect1a, lower brachium pontis MOSFET S1b, inductance L1aAnd with battery B2a、B2bThe upper brachium pontis being connected
MOSFET S2a, lower brachium pontis MOSFET S2b, inductance L2aThe work process of work process and base component be the same, be all
It is used for equalizing the cell in the group corresponding with oneself.Balancing procedure between group is as follows: in charge and discharge process, compares
This little Battery pack and the terminal voltage of upper a small group battery, it is assumed that the 0th group B0a、B0bTerminal voltage higher than the 1st group B1a、B1b's
Terminal voltage, the 1st group B1a、B1bTerminal voltage higher than the 2nd group B2a、B2bTerminal voltage, then in a PWM cycle, make the 1st
The upper brachium pontis MOSFET S that little Battery pack is corresponding1cConducting, the upper brachium pontis MOSFET S that the 2nd little Battery pack is corresponding2cConducting, then electricity
Stream iL1bBy the 0th little Battery pack B0a、B0b、L1bAnd S1c, electric current iL2bBy the 1st little Battery pack B1a、B1b、L2bAnd S2c,
B0a、B0bElectric discharge is L1bStore energy, B1a、B1bElectric discharge is L2bStore energy.S1c、S2cTurn it off after conducting certain time, this
Time electric current iL1bBy the lower brachium pontis MOSFET S that the 1st little Battery pack is corresponding1dFly-wheel diode, L1bAnd B1a、B1b, electric current
iL2bBy the lower brachium pontis MOSFET S that the 2nd little Battery pack is corresponding2dFly-wheel diode, L2bAnd B2a、B2b, L1bRelease energy
To B1a、B1bCharging, L2bRelease energy to B2a、B2bCharging, it is achieved that energy from the highest little Battery pack of terminal voltage to terminal voltage
The transfer of minimum little Battery pack.
Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned
The restriction of embodiment, other any without departing from the change made under spirit of the present utility model and principle, modify, replace
In generation, combine, simplify, all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (4)
1. the 2n circuit of battery pack balancing being prone to extension, it is characterised in that include battery module and equalizing circuit module；
Described battery module is composed in series by 2n battery, and every 2 batteries are a small group, and battery cell is from top to bottom respectively designated as
B0a、B0b、B1a、B1b、……、B(n-1)a、B(n-1)b, wherein n=1,2 ... ∞, described equalizing circuit module includes base component
With expansion, base component is by battery B0a、B0b, inductance L0With switch mosfet pipe S0a、S0bComposition, wherein B0aWith B0bSeries connection
Connect, B0aNegative pole and L0One end is connected, L0The other end and S0aSource electrode, S0bDrain electrode be connected, S0aDrain electrode and B0aJust
The most connected, S0bSource electrode and B0bNegative pole be connected, expansion is by battery Bma、BmbAnd the extension electronic circuit composition of correspondence, its
Middle m=1,2 ..., n-1.
The 2n circuit of battery pack balancing being prone to extension the most according to claim 1, it is characterised in that: described battery module
It is secondary cell, including lithium ion battery, lead-acid battery, ultracapacitor or Ni-MH battery.
The 2n circuit of battery pack balancing being prone to extension the most according to claim 1, it is characterised in that: described extension electronic circuit
Quantity be n-1；Each extension electronic circuit is made up of the MOSFET and two energy storage inductor L of four band fly-wheel diodes, with
This Battery pack Bma、BmbThe upper brachium pontis MOSFET being connected is Sma, lower brachium pontis MOSFET be Smb, inductance be Lma, connect upper one group
Battery is S with the upper brachium pontis MOSFET of this Battery packmc, lower brachium pontis MOSFET be Smd, inductance be Lmb, described SmaSource electrode and Smb
Drain electrode and energy storage inductor LmaOne end be connected；LmaThe other end as outfan c, SmaDrain electrode as outfan b, Smb's
Source electrode is as outfan d, SmcSource electrode and SmdDrain electrode and energy storage inductor LmbOne end be connected, LmbThe other end and SmaLeakage
The most connected, SmdSource electrode and SmbSource electrode be connected, SmcDrain electrode as outfan a, outfan a and a upper Battery pack B(m-1)a's
Positive pole is connected, outfan b and this Battery pack BmaPositive pole be connected, outfan c and BmbPositive pole be connected, outfan d and BmbNegative
The most connected, the grid of MOSFET is all connected with control circuit, makes turning on and off by control circuit control of MOSFET.
The 2n circuit of battery pack balancing being prone to extension the most according to claim 3, it is characterised in that: described control circuit
The dutycycle of output drive signal at least should can make energy storage inductor L reset within each signal period, i.e. a switch periods
The electric current of interior energy storage inductor the most all have to drop to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620082683.4U CN205622249U (en) | 2016-01-28 | 2016-01-28 | 2n group battery equalizer circuit who easily expands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620082683.4U CN205622249U (en) | 2016-01-28 | 2016-01-28 | 2n group battery equalizer circuit who easily expands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205622249U true CN205622249U (en) | 2016-10-05 |
Family
ID=57034816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620082683.4U Expired - Fee Related CN205622249U (en) | 2016-01-28 | 2016-01-28 | 2n group battery equalizer circuit who easily expands |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205622249U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529777A (en) * | 2016-01-28 | 2016-04-27 | 华南理工大学 | 2n battery pack equalizing circuit easy to expand |
| CN114421570A (en) * | 2022-01-27 | 2022-04-29 | 合肥太初电子有限公司 | Self-balancing circuit for series batteries |
-
2016
- 2016-01-28 CN CN201620082683.4U patent/CN205622249U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529777A (en) * | 2016-01-28 | 2016-04-27 | 华南理工大学 | 2n battery pack equalizing circuit easy to expand |
| CN114421570A (en) * | 2022-01-27 | 2022-04-29 | 合肥太初电子有限公司 | Self-balancing circuit for series batteries |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203660604U (en) | Power battery equalization management system of electric automobile | |
| CN105140998B (en) | The two-way non-dissipative equalizing circuit of series battery based on inductive energy storage | |
| CN106532852B (en) | Battery pack equalization circuit based on LC series energy storage | |
| CN107733007B (en) | Dual-target direct equalization circuit and equalization method for battery pack | |
| CN108134414B (en) | Modular equalization circuit and equalization mode thereof | |
| Jeon et al. | Active cell balancing circuit for series-connected battery cells | |
| CN107134599B (en) | Voltage equalization circuit of series battery pack and working method thereof | |
| CN102593893A (en) | System for realizing balanced discharging of battery sets | |
| CN104201731A (en) | Series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage | |
| CN204905967U (en) | Harmless balanced management system of high -power group battery of modularization | |
| CN107147162A (en) | A kind of equalizing circuit and its control method based on inductance capacitance quasi-resonance | |
| CN105162199A (en) | Layered balancing circuit for battery pack | |
| CN204334058U (en) | A kind of balancer of serial lithium battery group | |
| CN104868532A (en) | Cuk chopper circuit bidirectional arm-based series storage cell pack bidirectional energy equalizer and control method thereof | |
| CN105529777A (en) | 2n battery pack equalizing circuit easy to expand | |
| Azad et al. | Active cell balancing of Li-Ion batteries using single capacitor and single LC series resonant circuit | |
| CN102832667A (en) | Charge-discharge equalizer circuit based on inductive energy storage for series battery pack | |
| JP2020503834A (en) | Improved circuit for bidirectional lossless balancing of series battery packs based on inductive energy storage | |
| CN202872396U (en) | Charge and discharge equalization circuit for series battery based on inductance energy storage | |
| CN205622249U (en) | 2n group battery equalizer circuit who easily expands | |
| CN106712168A (en) | Parallel battery pack two-way lossless equalization circuit based on inductance energy storage | |
| CN213937499U (en) | Circuit for energy balance of series lithium battery pack | |
| CN105515130A (en) | Battery pack equalization circuit adopting general-divide structure | |
| CN204947672U (en) | The two-way non-dissipative equalizing circuit of series battery based on inductive energy storage | |
| CN106602647B (en) | Parallel battery pack bidirectional lossless equalization circuit based on capacitive energy storage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20200128 |