CN204741291U - Charge balanced control circuit , group battery charge management system - Google Patents
Charge balanced control circuit , group battery charge management system Download PDFInfo
- Publication number
- CN204741291U CN204741291U CN201520221497.XU CN201520221497U CN204741291U CN 204741291 U CN204741291 U CN 204741291U CN 201520221497 U CN201520221497 U CN 201520221497U CN 204741291 U CN204741291 U CN 204741291U
- Authority
- CN
- China
- Prior art keywords
- voltage
- battery pack
- control circuit
- mosfet
- circuit
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a charge balanced control circuit, group battery charge management system, in the group battery every battery cell be parallelly connected first voltage transfer scheme all, and first voltage transfer scheme is become with a diode cluster by a MOSFET, an inductance, wherein MOSFET the source electrode respectively with electric connection of one end of the negative pole and the inductance of diode, second voltage transfer scheme is become with a diode cluster with an inductance by a MOSFET, an electric capacity, be connected with MOSFET's in the anodal back of intercommunication each other of each diode in the parallelly connected first voltage transfer scheme of each battery cell and the second voltage transfer scheme drain electrode electricity, the negative pole of the diode in the second voltage transfer scheme, the positive pole of electric capacity are connected with the both ends of group battery are electric respectively. The utility model discloses can control accurately battery voltage, electric current to can guarantee the accurate unanimous of battery cell voltage.
Description
Technical field
The utility model belongs to battery charging field, is specifically related to a kind of charge balancing control circuit, battery pack charging management system.
Background technology
Usually, battery pack is in series by multiple cell, the unbalanced performance that can affect whole battery pack of capacity between battery.The battery pack charging management system of current existence only has protective device usually, and does not have voltage balancing device, when the capacity of certain cell and the capacity of other battery unbalanced time can affect the performance of whole battery pack.When batteries charging, if certain battery reaches fully charged state in battery pack, then whole battery pack is stopped charging, and other cell does not likely also reach fully charged state, and like this, whole battery pack does not just reach heap(ed) capacity.When battery power discharge, if when certain cell voltage reaches shutoff voltage, whole battery pack just can stop electric discharge, and now other battery likely also has residual capacity, and whole battery power discharge will be made so not thorough.Through all after dates of multiple charge/discharge, faster by than other cell performance decay of the minimum battery of capacity, and then the performance of whole battery pack is constantly reduced, in the course of time, whole battery pack not only can not meet energy storage requirement, but also the useful life of the whole battery pack of meeting serious curtailment.
For making battery pack realize best performance, namely when batteries charging, every batteries can be full of, and when battery power discharge, every batteries can reach shutoff voltage just.So just require ion battery group charging management system to often saving the voltage of cell, electric current accurately controls, thus ensures the accurately consistent of every batteries voltage.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of charge balancing control circuit, battery pack charging management system, can guarantee that expiring of each cell capacity fills, realize the maximization of battery pack accumulation of energy, the useful life of battery pack can be extended again, when charging, cell voltage, electric current accurately can be controlled, and the accurately consistent of monomer battery voltage can be ensured.
To achieve these goals, the utility model provides a kind of charge balancing control circuit, comprise the battery pack be composed in series by more piece cell, multiple first voltage transfer circuit and a second voltage transfer circuit, each cell in described battery pack first voltage transfer circuit all in parallel, the positive pole of described cell is electrically connected with the drain electrode of MOSFET in the first voltage transfer circuit, and the negative pole of described cell is electrically connected with one end of inductance in the first voltage transfer circuit;
Described first voltage transfer circuit is made up of a MOSFET, an inductance and a diode, and wherein the source electrode of MOSFET is electrically connected with the negative pole of diode and one end of inductance respectively;
Described second voltage transfer circuit is made up of a MOSFET, an electric capacity and an inductance and a diode, wherein the negative pole of electric capacity is electrically connected with the drain electrode of MOSFET, the source electrode of MOSFET is electrically connected with one end of inductance and the positive pole of diode respectively, and the other end of inductance is electrically connected with the positive pole of electric capacity;
Be electrically connected with the drain electrode of MOSFET in the second voltage transfer circuit after being interconnected with the positive pole of each diode in the first voltage transfer circuit of each cell parallel connection, the negative pole of the diode in the second voltage transfer circuit, the positive pole of electric capacity respectively with battery pack two ends be electrically connected.
A kind of battery pack charging management system, comprises the battery pack be composed in series by more piece cell and the power supply for charging to it be connected electrically,
Battery voltage detection circuit, for detecting the monomer voltage of each cell and the total voltage of battery pack in battery pack;
Intelligent control circuit, for receiving the detection data of battery voltage detection circuit, and can export control signal according to the charged state of battery pack;
Charge balancing control circuit, for receiving the control signal of intelligent control circuit, thus realizes the transfer of electricity between cell in battery pack;
Wherein battery pack, battery voltage detection circuit, intelligent control circuit and charge balancing control circuit are electrically connected successively;
Wherein in charge balancing control circuit, the grid of all MOSFET is all electrically connected with the control port of intelligent control circuit.
Described intelligent control circuit adopts TMS320F28335 chip.
Described battery voltage detection circuit is connected to form primarily of the voltage sensor be arranged on each cell, the voltage sensor that is arranged on battery pack two ends.
In the utility model, battery voltage detection circuit detects the voltage of each cell and the total voltage of battery pack in battery pack, and testing result is sent into intelligent control circuit in real time, intelligent control circuit is according to the charge condition of cell each in present battery group, by the Setting signal of adjustment charge balancing control circuit, realize the adjustment of charge balancing control circuit operating state, thus achieve the mutual transfer of electricity in battery pack, complete the Balance route to batteries charging overall process, can when charging, to cell voltage, electric current accurately controls, and the accurately consistent of monomer battery voltage can be ensured, so just effectively ensuring expiring of each cell capacity fills, the maximization of battery pack accumulation of energy can be realized, the useful life of battery pack can be extended again.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the schematic diagram of charge balancing control circuit in the utility model;
Fig. 3 is a group simulation result figure;
Fig. 4 is b group simulation result figure;
Fig. 5 is c group simulation result figure.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 2, Fig. 2 is the battery pack that three batteries are composed in series, a kind of charge balancing control circuit, comprise the battery pack be composed in series by more piece cell, multiple first voltage transfer circuit and a second voltage transfer circuit, each cell in described battery pack first voltage transfer circuit all in parallel, the positive pole of described cell is electrically connected with the drain electrode of MOSFET in the first voltage transfer circuit, and the negative pole of described cell is electrically connected with one end of inductance in the first voltage transfer circuit;
Described first voltage transfer circuit is made up of a MOSFET, an inductance and a diode, and wherein the source electrode of MOSFET is electrically connected with the negative pole of diode and one end of inductance respectively;
Described second voltage transfer circuit is made up of a MOSFET, an electric capacity and an inductance and a diode, wherein the negative pole of electric capacity is electrically connected with the drain electrode of MOSFET, the source electrode of MOSFET is electrically connected with one end of inductance and the positive pole of diode respectively, and the other end of inductance is electrically connected with the positive pole of electric capacity;
Be electrically connected with the drain electrode of MOSFET in the second voltage transfer circuit after being interconnected with the positive pole of each diode in the first voltage transfer circuit of each cell parallel connection, the negative pole of the diode in the second voltage transfer circuit, the positive pole of electric capacity respectively with battery pack two ends be electrically connected.Wherein in this charge balancing control circuit, the grid of all MOSFET can be electrically connected with a control voltage respectively, also can be electrically connected with an intelligent controller control port.
As shown in Figure 1, a kind of battery pack charging management system, comprises the battery pack be composed in series by more piece cell and the power supply for charging to it be connected electrically,
Battery voltage detection circuit, for detecting the monomer voltage of each cell and the total voltage of battery pack in battery pack;
Intelligent control circuit, for receiving the detection data of battery voltage detection circuit, and can export control signal according to the charged state of battery pack;
Charge balancing control circuit, for receiving the control signal of intelligent control circuit, thus realizes the transfer of electricity between cell in battery pack;
Wherein battery pack, battery voltage detection circuit, intelligent control circuit and charge balancing control circuit are electrically connected successively;
Wherein in charge balancing control circuit, the grid of all MOSFET is all electrically connected with the control port of intelligent control circuit.
Described intelligent control circuit adopts TMS320F28335 chip.
Described battery voltage detection circuit is connected to form primarily of the voltage sensor be arranged on each cell, the voltage sensor that is arranged on battery pack two ends.
Battery pack charging management system, to a method for batteries charging, comprises the following steps:
(1) battery voltage detection circuit detects the i-th batteries B
imonomer voltage V
biwith the average voltage V of battery pack
ave, and detection data are transferred to intelligent control circuit;
(2) intelligent control circuit is to V
aveand V
bicompare, work as V
bi>V
avetime, intelligent control circuit controls the MOSFET Q be connected with the i-th batteries positive pole
iopen-minded, the i-th batteries B
iunnecessary electricity can transfer to the inductance L corresponding with the i-th batteries
ion; Work as V
bi≤ V
avetime, intelligent control circuit controls the MOSFET Q be connected with the i-th batteries positive pole
iturn off, inductance L
i, the i-th+1 batteries B
i+1, the i-th+2 batteries B
i+2to final section battery B
n, electric capacity C in the second voltage transfer circuit
rand the diode D corresponding with the i-th batteries
iform discharge loop, inductance L
ion unnecessary electricity through L
i→ B
i+1b
n→ C
r→ D
i→ L
itransfer to the electric capacity C in the battery in downstream and the second voltage transfer circuit
ron;
(3) as electric capacity C
ron voltage when exceeding set point, intelligent control circuit controls the MOSFET Q in the second voltage transfer circuit
ropen-minded, electric capacity C
ron electricity can transfer to inductance L in the second voltage transfer circuit
ron; As electric capacity C
ron voltage when being not more than set point, intelligent control circuit controls the MOSFET Q in the second voltage transfer circuit
rturn off, inductance L
ron electricity by the diode D in the second voltage transfer circuit
rfeed back in major loop, thus achieve the equilibrium of energy.
This charge balancing control circuit is the small-sized equalizing circuit based on buck-boost conversion, the pwm control signal that electric power device MOSFET is wherein exported by intelligent control circuit and TMS320F28335 chip circuit (DSP control circuit) controls, thus realize the mutual transfer of electricity in battery pack, complete battery pack control circuit voltage balancing function.
Charge balancing control circuit principle Analysis:
If V
bibe the voltage of the i-th batteries, V
avefor the average voltage of battery pack.If V
bi>V
ave, open Q
i, now B
i→ Q
i→ L
iform loop, B
iupper unnecessary electricity will transfer to L
ion; If V
bi≤ V
ave, turn off Q
i, now L
i→ B
i+1b
n→ C
r→ D
i→ L
iform loop, L
ion electricity just transferred to rear class battery and C
ron.Work as C
ron voltage when exceeding preset value, open Q
r, now C
r→ Q
r→ L
rform loop, C
rupper unnecessary electricity will transfer to L
ron; Work as C
ron voltage lower than preset value time, turn off Q
r, now L
ron electricity pass through D
rfeed back in major loop, thus achieve balancing energy.
The control algolithm of this intelligent control circuit adopts fuzzy control, make a concrete analysis of as follows: in the power supply system, battery pack often containing joint cell up to a hundred, cannot set up its accurate Mathematical Modeling, therefore, traditional control theory and control algolithm cannot meet the requirement of this system.For the complexity feature of battery pack charging management system, introduce fuzzy control as its control algolithm.For energy higher than the more cell of mean value, control its repid discharge; For energy higher than the less battery of mean value, control it and slowly discharge, and this is just meeting the feature of fuzzy control.
Two inputs of classical fuzzy controller are respectively the deviation e of system and the rate of change ec=de/dt of deviation.In battery pack equilibrium management system, two inputs of its fuzzy controller are respectively voltage difference e and voltage difference rate of change ec, and wherein e and ec is as shown in (1) (2).
Voltage difference e:e=Δ V=V
bi-V
ave(1)
Voltage difference rate of change ec:ec=e2-e1 (2)
V in formula
bibe the i-th batteries voltage, V
avefor battery pack average voltage, e1 is the voltage difference that previous state records, and e2 is the voltage difference that a rear state records.
Circuit of battery pack balancing only needs to discharge to the battery of voltage in battery pack higher than battery pack average voltage, and therefore the input deviation e of native system is greater than zero all the time.
In battery pack balancing control system, the object introducing fuzzy control makes the voltage difference between single lithium battery be no more than 0.05V, thus makes the voltage of each cell consistent as much as possible at the end of being to charge.
On the basis that circuit of battery pack balancing and FUZZY ALGORITHMS FOR CONTROL are analyzed, based on Simulink simulation software in Matlab, simulation study is carried out to circuit of battery pack balancing Fuzzy control system.In simulation process, select 3 batteries composition battery pack as tested object, monomer battery voltage is arranged on the non-equilibrium state that a, b, c tri-groups is different: a group: VB1=3.8V, VB2=3.4V, VB3=3.0V; B group: VB1=4V, VB2=3.8V, VB3=3.1V; C group: VB1=3.2V, VB2=3.1V, VB3=3.0V, the simulation result obtained as shown in Figures 3 to 5.
From the simulation experiment result, in battery pack, the charging rate of cell is different, the battery charging rate that initial voltage is lower is very fast, and the higher battery charging rate of initial voltage is slower, but finally their full charge pressure is consistent, and this equalizing circuit object that will realize just.This charge balancing control circuit and charging management system and method best for the charge balancing effect of Li-ion batteries piles.
Claims (4)
1. a charge balancing control circuit, comprise the battery pack be composed in series by more piece cell, it is characterized in that, also comprise multiple first voltage transfer circuit and a second voltage transfer circuit, each cell in described battery pack first voltage transfer circuit all in parallel, the positive pole of described cell is electrically connected with the drain electrode of MOSFET in the first voltage transfer circuit, and the negative pole of described cell is electrically connected with one end of inductance in the first voltage transfer circuit;
Described first voltage transfer circuit is made up of a MOSFET, an inductance and a diode, and wherein the source electrode of MOSFET is electrically connected with the negative pole of diode and one end of inductance respectively;
Described second voltage transfer circuit is made up of a MOSFET, an electric capacity and an inductance and a diode, wherein the negative pole of electric capacity is electrically connected with the drain electrode of MOSFET, the source electrode of MOSFET is electrically connected with one end of inductance and the positive pole of diode respectively, and the other end of inductance is electrically connected with the positive pole of electric capacity;
Be electrically connected with the drain electrode of MOSFET in the second voltage transfer circuit after being interconnected with the positive pole of each diode in the first voltage transfer circuit of each cell parallel connection, the negative pole of the diode in the second voltage transfer circuit, the positive pole of electric capacity respectively with battery pack two ends be electrically connected.
2. utilize a battery pack charging management system for the charge balancing control circuit in claim 1, comprising the battery pack be composed in series by more piece cell and the power supply for charging to it be connected electrically, it is characterized in that,
Also comprise battery voltage detection circuit, for detecting the monomer voltage of each cell and the total voltage of battery pack in battery pack;
Intelligent control circuit, for receiving the detection data of battery voltage detection circuit, and can export control signal according to the charged state of battery pack;
Charge balancing control circuit, for receiving the control signal of intelligent control circuit, thus realizes the transfer of electricity between cell in battery pack;
Wherein battery pack, battery voltage detection circuit, intelligent control circuit and charge balancing control circuit are electrically connected successively;
Wherein in charge balancing control circuit, the grid of all MOSFET is all electrically connected with the control port of intelligent control circuit.
3. a kind of battery pack charging management system according to claim 2, is characterized in that, described intelligent control circuit adopts TMS320F28335 chip.
4. a kind of battery pack charging management system according to Claims 2 or 3, is characterized in that, described battery voltage detection circuit is connected to form primarily of the voltage sensor be arranged on each cell, the voltage sensor that is arranged on battery pack two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221497.XU CN204741291U (en) | 2015-04-13 | 2015-04-13 | Charge balanced control circuit , group battery charge management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221497.XU CN204741291U (en) | 2015-04-13 | 2015-04-13 | Charge balanced control circuit , group battery charge management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204741291U true CN204741291U (en) | 2015-11-04 |
Family
ID=54423012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520221497.XU Withdrawn - After Issue CN204741291U (en) | 2015-04-13 | 2015-04-13 | Charge balanced control circuit , group battery charge management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204741291U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852423A (en) * | 2015-04-13 | 2015-08-19 | 徐州凯思特机电科技有限公司 | Charging equalized control circuit and battery pack charging management system and method |
| CN109638915A (en) * | 2018-12-22 | 2019-04-16 | 北京汉能光伏投资有限公司 | A kind of charge/discharge control method and device |
-
2015
- 2015-04-13 CN CN201520221497.XU patent/CN204741291U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852423A (en) * | 2015-04-13 | 2015-08-19 | 徐州凯思特机电科技有限公司 | Charging equalized control circuit and battery pack charging management system and method |
| CN109638915A (en) * | 2018-12-22 | 2019-04-16 | 北京汉能光伏投资有限公司 | A kind of charge/discharge control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106300545B (en) | A kind of active equalization control device and control method for liquid metal cell | |
| CN103633695B (en) | A kind of lithium battery group equalization methods of improvement and equalizing circuit thereof | |
| US10230248B2 (en) | Maintenance method of power battery pack | |
| CN104852423B (en) | A kind of charge balancing control circuit, battery pack charging management system and method | |
| WO2021104190A1 (en) | Parallel charging and discharging management system for multiple batteries | |
| CN103501025A (en) | Active equalization system of battery pack | |
| CN102195523B (en) | Intelligent solar photovoltaic power supply system | |
| CN105489962A (en) | Recycling method for waste power lithium ion batteries | |
| CN103647327A (en) | Automatic charging and discharging equilibrium device for battery pack | |
| CN104953659B (en) | A kind of battery set charge/discharge equalizing circuit and charging/discharging thereof | |
| CN108110844A (en) | A kind of balancer of battery pack | |
| CN207753126U (en) | A kind of lithium battery management system | |
| CN111366864A (en) | Battery SOH on-line estimation method based on fixed voltage rise interval | |
| CN101388562B (en) | Fast charging method | |
| CN102723762A (en) | Lithium ion storage battery formation circuit | |
| CN204741291U (en) | Charge balanced control circuit , group battery charge management system | |
| CN201956725U (en) | Equalizing device of power iron phosphate lithium battery pack | |
| CN106671813A (en) | Battery balancing method and battery management system | |
| CN201860135U (en) | Battery charging device capable of equalizing charging | |
| CN109193874B (en) | Battery pack equalizing charge circuit and charging method thereof | |
| CN201138676Y (en) | Balanced control module of protection circuit board of 10 string lithium ion batteries | |
| CN103516002A (en) | Method and equipment for fast and equalizing charging of lithium ion battery pack | |
| CN203674739U (en) | Passive equalizer circuit | |
| CN112649734A (en) | SOC estimation method based on improved PNGV model and extended Kalman algorithm | |
| CN104242395A (en) | Active equalization circuit and equalization method of series batteries of single transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151104 Effective date of abandoning: 20180126 |