CN104734308B - A kind of batteries fill control circuit and control method online - Google Patents
A kind of batteries fill control circuit and control method online Download PDFInfo
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- CN104734308B CN104734308B CN201510189939.1A CN201510189939A CN104734308B CN 104734308 B CN104734308 B CN 104734308B CN 201510189939 A CN201510189939 A CN 201510189939A CN 104734308 B CN104734308 B CN 104734308B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000008521 reorganization Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 238000005457 optimization Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
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Abstract
The invention discloses a kind of batteries to fill control circuit and control method online, the positive and negative electrode of each cell batteries of the circuit is respectively connected by a MOSFET FET with dc bus L1 or dc bus L2, MOSFET FETs are also connected by the output end of drive circuit and register, and the input of register is connected with the main control chip MCU；Dc bus L1, L2 are connected to linear optical coupling, subtracter connection, A/D change-over circuits and main control chip MCU, and DC/DC change-over circuits are additionally provided between dc bus L1 and dc bus L2.The present invention utilizes cell terminal voltage detecting circuit and bulk charge road general DC busbar, it can realize that batteries fill function online, reduce MCU I/O port usage quantity, and reduce influence of the variable connector to voltage signal, and reduce it is existing fill control circuit hardware cost, reduce control panel area occupied.
Description
Technical field
The present invention relates to power electronics control technology field, more particularly to electric automobile and a kind of battery of power network energy storage
The batteries of group management control field fill control circuit and control method online.
Background technology
At present, battery is widely used in industrial production and the every field of people's life, especially electric automobile
And a kind of batteries of power network energy storage fill control technology online.In order to obtain high power, high voltage, it is necessary to by battery strings
It is used in parallel, but the parameter of each battery cell is inconsistent, result in the inconsistent of battery charging and discharging performance.In order that obtain each
The capacity of cell discharge and recharge reaches unanimity, and extends battery pack service life, it is necessary to be managed to each cell, and
The core of management is that on-line checking how is carried out to monomer battery voltage and realizes mutually filling between cell, due to electronic vapour
Car or the battery of power network energy storage series connection are a lot, and voltage is higher, at present using individually detection circuit with individually filling control
Circuit, cause control panel more using element, cost is high, and area occupied is big.
The content of the invention
Goal of the invention：The invention aims to solve deficiency of the prior art, there is provided one kind is by batteries
Monomer battery voltage detects circuit and fills control circuit and tries one's best common elements, reduces hardware cost, reduces circuit board and takes face
Long-pending batteries fill control circuit and control method online.
Technical scheme：A kind of batteries of the present invention fill control circuit online, if including by dry battery string
Join the batteries of composition, dc bus L1, L2, some MOSFET FETs, drive circuit, register, DC/DC conversion electricity
Road, linear optical coupling, subtracter, A/D change-over circuits and main control chip MCU, the positive and negative electrode of each cell batteries are each logical
Cross a MOSFET FET to be connected with dc bus L1 or dc bus L2, the MOSFET FETs also pass through driving
Circuit is connected with the output end of the register, and the input of the register is connected with the main control chip MCU；The direct current
Bus L1, L2 are connected by linear optical coupling with the subtracter respectively, and the subtracter output passes through, A/D change-over circuits and institute
Main control chip MCU connections are stated, DC/DC change-over circuits are additionally provided between the dc bus L1 and dc bus L2.
As optimization, the source electrode of the positive and negative electrodes of each cell batteries respectively with the MOSFET FETs connects
Connect, the drain electrode for stating MOSFET FETs is connected with dc bus L1 or dc bus L2.
As optimization, the drain electrode of the MOSFET FETs is connected with the drive circuit.
As optimization, the drive circuit includes the drive circuit of eight groups of corresponding eight MOSFET pipes, every group of drive circuit
Including opening driving and shut-off driving two parts, it is connected using light-coupled isolation amplifying circuit with register.
As optimization, the register uses 74LS595 chips.
As optimization, serial data input, shift clock control terminal and the output latch control terminal of the register
It is connected with main control chip MCU three pins.
As optimization, the main control chip MCU using singlechip group into minimum circuit form, including power circuit, when
Clock circuit and reset circuit.Any three I/O ports of main control chip MCU can control a piece of 74ls595.In batteries monomer electricity
When pond is more, can multiple 74LS595 share I/O port control its serial data input, shift clock control terminal and output latch
Control terminal, the Enable Pin of each chip are individually controlled with an I/O port, save I/O port usage quantity.
Fill the control method of control circuit online the invention also discloses a kind of batteries, the control method includes electricity
Two kinds of mode of operations of pond terminal voltage detecting and equalizaing charge：
Battery terminal voltage detects：The MOSFET pipes that a certain cell both positive and negative polarity is connected to dc bus L1, L2 are beaten
Open, the shut-off of other MOSFET pipes, stop the work of DC/DC circuits, you can carry out cell terminal voltage detecting；
Equalizaing charge：Terminal voltage highest cell positive pole in one Battery pack is connected to dc bus L1's
MOSFET pipes are opened, and the MOSFET pipes that the minimum cell positive pole of terminal voltage is connected to dc bus L2 are opened, other
MOSFET pipes turn off, and open the work of DC/DC circuits, you can and the equalizaing charge between two section cells is carried out, can be filled online,
Battery pack supplying power for outside is not influenceed or outside to battery pack charging；
The specific control process of above two mode of operation comprises the following steps：
（1）Start first to send 0X03 instructions to register；
（2）First segment cell voltage is detected, the data variable of transmission is then moved to left one, detects the second cell voltage,
By that analogy, until reorganization cell voltage is all detected and finished；
（3）Main control chip MCU compares voltage highest battery and the minimum battery of voltage, and sends corresponding data value to deposit
Device；
（4）Register opens corresponding MOSFET FETs, and ceiling voltage battery is connected into dc bus L1, most
Low-voltage battery is connected to dc bus L2；
（5）Filled online by being realized after DC/DC change-over circuits regulation voltage.
Beneficial effect：The present invention is used using cell terminal voltage detecting circuit and bulk charge road general DC busbar
74LS595 substitutes variable connector, can realize that batteries fill function online, reduces MCU I/O port usage quantity, and detect
During battery tension, dc bus is connected to using MOSFET pipes, without variable connector, reduces variable connector and voltage is believed
Number influence, and reduce it is existing fill control circuit hardware cost, reduce control panel area occupied.
Brief description of the drawings
Fig. 1 is the control circuit schematic diagram of the present invention；
Fig. 2 is that the battery of prior art fills control circuit block diagram；
Fig. 3 is present invention detection, fills control subroutine flow chart.
Embodiment
A kind of batteries as shown in Figure 1 fill control circuit online, if including by dry battery（Bn,Bn+1…）String
Join the batteries of composition, dc bus L1, L2, some MOSFET FETs (Qm, Qm+1 ...), drive circuit, register
74LS595, DC/DC change-over circuit, linear optical coupling, subtracter, A/D change-over circuits and main control chip MCU, each monomer
The positive and negative electrode of battery is respectively connected by a MOSFET FET with dc bus L1 or dc bus L2, described
MOSFET FETs are also connected by drive circuit with the output end of the register, the input of the register with it is described
Main control chip MCU connections；Described dc bus L1, L2 are connected by linear optical coupling with the subtracter respectively, the subtracter
Output passes through, and A/D change-over circuits are connected with the main control chip MCU, is also set between the dc bus L1 and dc bus L2
There are DC/DC change-over circuits.
As the further optimization of above-mentioned technical proposal, the positive and negative electrodes of each cell batteries respectively with it is described
The source electrode connection of MOSFET FETs, the drain electrode for stating MOSFET FETs connect with dc bus L1 or dc bus L2
Connect.The drain electrode of every eight MOSFET FETs is connected with the drive circuit.The drive circuit includes eight groups and corresponds to eight
The drive circuit of MOSFET pipes, every group of drive circuit are included opening driving and shut-off driving two parts, put using light-coupled isolation
Connection greatly between circuit and 74LS595.Serial data input, shift clock control terminal and the output latch of the register
Device control terminal is connected with main control chip MCU three pins.The main control chip MCU can use disposable type singlechip group into
Minimum circuit is formed, including power circuit, clock circuit and reset circuit.Any three I/O ports of main control chip MCU are i.e. controllable
A piece of 74ls595.When storage battery unit cell is more, can multiple 74LS595 share I/O port control its serial date transfer
End, shift clock control terminal and output latch control terminal, the Enable Pin of each chip are individually controlled with an I/O port, save IO
Mouth usage quantity.
Fig. 2 is that the battery that prior art uses fills control circuit block diagram.As illustrated, accumulator anode and cathode is by signal
Variable connector is delivered to, a certain monomer battery voltage signal is delivered into A/D convertor circuit through subtracter by variable connector selectivity, by
MCU is delivered to after A/D convertor circuit conversion and reads detection cell voltage.After finding out ceiling voltage battery and minimum voltage battery, MCU
By another variable connector, control corresponding MOSFET to manage, two batteries are carried out through dc bus L1, L2, DC/DC circuit
Fill.
Fig. 2 is compared to, the present invention is selected a certain battery terminal voltage signal using 74LS595 control MOSFET in Fig. 1
Dc bus L1, L2 are delivered to, the linear optocoupler of signal is delivered to subtracter by dc bus, then delivers to MCU detection electricity through AD conversion
Cell voltage.By measuring multiple cell voltages, ceiling voltage battery and minimum voltage battery are compared, the two positive terminal is connected
MOSFET openings are connect, ceiling voltage battery is connected to L1, and minimum voltage battery is connected to L2, and voltage is adjusted by DC/DC circuits
Realize and fill online afterwards.
Fig. 3 is present invention detection, fills control subroutine flow chart.The batteries of the present invention fill control circuit online
Control method, the control method include battery terminal voltage detect and two kinds of mode of operations of equalizaing charge：
Battery terminal voltage detects：The MOSFET pipes that a certain cell both positive and negative polarity is connected to dc bus L1, L2 are beaten
Open, the shut-off of other MOSFET pipes, stop the work of DC/DC circuits, you can carry out cell terminal voltage detecting；
Equalizaing charge：Terminal voltage highest cell positive pole in one Battery pack is connected to dc bus L1's
MOSFET pipes are opened, and the MOSFET pipes that the minimum cell positive pole of terminal voltage is connected to dc bus L2 are opened, other
MOSFET pipes turn off, and open the work of DC/DC circuits, you can and the equalizaing charge between two section cells is carried out, can be filled online,
Battery pack supplying power for outside is not influenceed or outside to battery pack charging；
Specific control process such as Fig. 3 of above two mode of operation comprises the following steps：
（1）Start first to send 0X03 instructions to register；
（2）First segment cell voltage is detected, the data variable of transmission is then moved to left one, detects the second cell voltage,
By that analogy, until reorganization cell voltage is all detected and finished；
（3）Main control chip MCU compares voltage highest battery and the minimum battery of voltage, and sends corresponding data value to deposit
Device；
（4）Register opens corresponding MOSFET FETs, and ceiling voltage battery is connected into dc bus L1, most
Low-voltage battery is connected to dc bus L2；
（5）Filled online by being realized after DC/DC change-over circuits regulation voltage.
The both positive and negative polarity of battery is connected on dc bus L1 and L2 by the present invention respectively, by controllable logical between L1, L2
Disconnected DC/DC circuits are connected.The circuit both can detect cell batteries terminal voltage, can carry out equalizaing charge again.Using 75LS595
MOSFET pipe break-makes are controlled, signal are introduced into dc bus, then electric power signal is sent into subtracter, AD conversion electricity by dc bus
Road and main control chip MCU are detected.Variable connector is needed not move through, directly delivers to accumulator voltage signal directly through MOSFET
Bus is flowed, the linear optocoupler of voltage signal, subtracter are delivered into A/D convertor circuit by dc bus, reduce variable connector to electricity
Press the influence of signal.
The present invention is replaced using cell terminal voltage detecting circuit and bulk charge road general DC busbar using 74LS595
It for variable connector, can realize that batteries fill function online, reduce MCU I/O port usage quantity, and detect storage battery
During pressure, dc bus is connected to using MOSFET pipes, without variable connector, reduces shadow of the variable connector to voltage signal
Ring, and reduce it is existing fill control circuit hardware cost, reduce control panel area occupied.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit according to the present invention
Any simple modification, equivalent change and modification made to above example, in the range of still falling within technical solution of the present invention.
Claims (6)
1. a kind of batteries fill control circuit online, it is characterised in that：If including the electric power storage being composed in series by dry battery
Pond group, dc bus L1, L2, some MOSFET FETs, drive circuit, register, DC/DC change-over circuits, linear optical coupling,
Subtracter, A/D change-over circuits and main control chip MCU, the positive and negative electrode of each cell batteries respectively pass through a MOSFET
FET is connected with dc bus L1 or dc bus L2, and the MOSFET FETs are also posted by drive circuit with described
The output end connection of storage, the input of the register are connected with the main control chip MCU；Described dc bus L1, L2 points
It is not connected by linear optical coupling with the subtracter, the subtracter output passes through, A/D change-over circuits and the main control chip
MCU connections, DC/DC change-over circuits, each cell batteries are additionally provided between the dc bus L1 and dc bus L2
Source electrode of the positive and negative electrode respectively with the MOSFET FETs be connected, the drain electrode for stating MOSFET FETs and direct current
Bus L1 or dc bus L2 connections；
The control method of above-mentioned control circuit, including battery terminal voltage detection and two kinds of mode of operations of equalizaing charge：
Battery terminal voltage detects：The MOSFET pipes that a certain cell both positive and negative polarity is connected to dc bus L1, L2 are opened, its
He turns off MOSFET pipes, stops the work of DC/DC circuits, you can carry out cell terminal voltage detecting；
Equalizaing charge：The MOSFET that terminal voltage highest cell positive pole in one Battery pack is connected to dc bus L1 is managed
Open, the MOSFET pipes that the minimum cell positive pole of terminal voltage is connected to dc bus L2 are opened, and other MOSFET pipes close
It is disconnected, open the work of DC/DC circuits, you can carry out the equalizaing charge between two section cells, can fill online, not influence battery
Group supplying power for outside is outside to battery pack charging；
The specific control process of above two mode of operation comprises the following steps：
(1) start first to send 0X03 instructions to register；
(2) first segment cell voltage is detected, the data variable of transmission is then moved to left one, the second cell voltage is detected, with this
Analogize, until all detection finishes reorganization cell voltage；
(3) main control chip MCU compares voltage highest battery and the minimum battery of voltage, and sends corresponding data value to register；
(4) register opens corresponding MOSFET FETs, and ceiling voltage battery is connected into dc bus L1, minimum electricity
Piezoelectric battery is connected to dc bus L2；
(5) filled online by being realized after DC/DC change-over circuits regulation voltage.
2. a kind of batteries according to claim 1 fill control circuit online, it is characterised in that：The MOSFET fields
The drain electrode of effect pipe is connected with the drive circuit.
3. a kind of batteries according to claim 1 or 2 fill control circuit online, it is characterised in that：The driving
Circuit includes the drive circuit of eight groups of corresponding eight MOSFET pipes, and every group of drive circuit includes opening driving and shut-off driving two
Point, it is connected using light-coupled isolation amplifying circuit with register.
4. control circuit is filled online according to a kind of batteries described in claim 1, it is characterised in that：The register uses
74LS595 chips.
5. control circuit is filled online according to a kind of batteries described in claim 1 or 4, it is characterised in that：The register
Serial data input, shift clock control terminal and output latch control terminal be connected with main control chip MCU three pins.
6. control circuit is filled online according to a kind of batteries described in claim 1, it is characterised in that：The main control chip
MCU using singlechip group into minimum circuit form, including power circuit, clock circuit and reset circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510189939.1A CN104734308B (en) | 2015-04-21 | 2015-04-21 | A kind of batteries fill control circuit and control method online |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510189939.1A CN104734308B (en) | 2015-04-21 | 2015-04-21 | A kind of batteries fill control circuit and control method online |
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| CN104734308A CN104734308A (en) | 2015-06-24 |
| CN104734308B true CN104734308B (en) | 2018-01-05 |
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| CN106329600B (en) * | 2015-07-03 | 2018-12-14 | 华润矽威科技（上海）有限公司 | Battery management AFE(analog front end), battery management system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009081989A (en) * | 2007-09-25 | 2009-04-16 | O2 Micro Inc | System and method for cell balancing |
| KR101076786B1 (en) * | 2009-01-30 | 2011-10-25 | 한국과학기술원 | Charge Equalization Apparatus for Series-Connected Battery String and Charge Equalization Method Thereof |
| CN204103523U (en) * | 2014-07-17 | 2015-01-14 | 江苏工程职业技术学院 | A kind of online lithium battery group equalizing system |
| CN204481540U (en) * | 2015-04-21 | 2015-07-15 | 江苏工程职业技术学院 | A kind of batteries all fills control circuit online |
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