CN107342600A - The energy storage battery management system of circulation between a kind of control lithium battery group - Google Patents
The energy storage battery management system of circulation between a kind of control lithium battery group Download PDFInfo
- Publication number
- CN107342600A CN107342600A CN201710043001.8A CN201710043001A CN107342600A CN 107342600 A CN107342600 A CN 107342600A CN 201710043001 A CN201710043001 A CN 201710043001A CN 107342600 A CN107342600 A CN 107342600A
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- CN
- China
- Prior art keywords
- charging
- comparator
- operational amplifier
- current
- mcu
- 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
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 20
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000004146 energy storage Methods 0.000 title claims abstract description 10
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 239000013256 coordination polymer Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 238000007726 management method Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000005955 Ferric phosphate Substances 0.000 description 2
- 229940032958 ferric phosphate Drugs 0.000 description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical group [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 2
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 2
- 208000017667 Chronic Disease Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H02J7/0026—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention supplies a kind of energy storage battery management system of circulation between control lithium battery group, including operational amplifier, comparator, MCU, latch, inspection leakage resistance, charging MOS, electric discharge MOS；Examine leakage resistance both ends draw all the way differential signal to described operational amplifier, operational amplifier exports the positive input terminal for being connected to comparator, and the negative input end of comparator is connected to MCU DAC delivery outlets, comparator exports the interrupt trigger signal as MCU all the way, clock signal of the another way as d type flip flop, the output of d type flip flop negate with the control signal phase for the MOS that charges and are followed by the grid of metal-oxide-semiconductor.
Description
Technical field
The present invention relates to a kind of energy storage battery management system of circulation between control lithium battery group.
Background technology
Two (or multiple) battery packs are in parallel, constitute closed-loop path, circulation just occurs, due to battery pack internal resistance very
Low, close to zero, the direction of circulation is to come out (direction of electric discharge) from the battery pack of high voltage, is poured in down a chimney into low voltage
Battery pack (direction of charging), according to circuitry Ohm's law, the sum of the internal resistance of size=voltage difference of circulation/two, so even if
Pressure difference very little, due to battery pack internal resistance very little, moment forms larger loop current.Battery pack is mainly by battery core and battery intelligent
Manage BMS protection boards to form, by the use of MOS as charge and discharge switch in BMS protection boards, and MOS losses are divided into conduction loss and switch
Loss, instantaneous large-current cause MOS momentary loss very big, before discharge and recharge overcurrent protection delay bombing can be caused to act, together
When to the heavy current impact of battery core, it is also possible to cause deterioration of battery, or damage.It is therefore desirable to have protection device, at present, BMS
In just have this protection device.
BMS (Battery Management System battery management systems) protection board charging current limiter plate controlling party at present
Method includes：
1st, charging access is detected, starts charging current limiter plate at once, turns off charging MOS, shortcoming is to detect charging access,
BMS sampled current values, if charging current arrives at charging overcurrent value, start (bigger, the such as 1000mS) protection of overcurrent delay,
If arrive at charging short circuit current protection value to charging current, start (smaller, the such as 200uS) protection of charging short circuit delay.
If just current value is between excessively stream threshold and short-circuit threshold, now overcurrent protection delayed startup, but because the time is longer,
Before overcurrent protection, MOS high power consumptions cause bombing.
2nd, charging access is detected, opens charging MOS and current limiting plate, samples charging current, software processing, when electric current arrives at
The excessively stream that charges or short circuit, MCU output controls close charging MOS, with respect to the first way, the excessively stream that charges or short circuit, and current limiting plate
Cutting speed can be shorter, carries on as before and wants sampled processing and output control, in delay time, it is possible to cause MOS bombings and
Injure battery core.
In existing BMS, charging current limiter plate current limitation value can not be set, and be focused mostly in 5A or 10A current limlitings, can not
Digital control and continuously adjustabe.
The content of the invention
The present invention is directed in current BMS, and charging current limiter plate current limitation value can not be set, and is focused mostly in 5A or 10A limits
Stream, can not digital control and continuously adjustabe deficiency, there is provided a kind of energy storage battery management system for controlling circulation between lithium battery group.
The present invention is realizes that technical scheme used by its technical purpose is a kind of energy storage for controlling circulation between lithium battery group
Battery management system, including current detection circuit, control circuit.What described control circuit detected according to current detection circuit
The input of battery pack or output current realize the driving to charging metal-oxide-semiconductor and the metal-oxide-semiconductor that discharges, it is characterised in that：Described control
Circuit processed includes front-end A FE circuits, main control MCU, latch, described front-end A FE circuits connection battery pack and main control MCU, main
Charging over-current signal caused by control MCU enters latches, is charged caused by latch generation pass charging signals and main control MCU
Switching signal connects the input with logic gates, the output termination charging metal-oxide-semiconductor and the metal-oxide-semiconductor that discharges of logic gates respectively
MOS drive devices.
The present invention is using to charging current Precision measurement, numeral and analog circuitry processes, and software and hardware quick response, solution
The certainly high current circulation discharge and recharge problem in battery bag parallel process, thoroughly effectively solve circulation and fry MOS or damage battery core
Chronic disease.
Further, between above-mentioned control lithium battery group in the energy storage battery management system of circulation：Described current detecting
Circuit includes inspection leakage resistance, operational amplifier, comparator, and described inspection leakage resistance is arranged on the negative pole B- of battery pack and charging is wrapped
Between negative pole, the in-phase input end and out-phase input of described operational amplifier connect the both ends of inspection leakage resistance respectively, wherein, institute
The negative pole B- sides of the homophase input termination battery pack for the operational amplifier stated；Described operational amplifier output terminal connects comparator
In-phase input end, the main control MCU described in the out-phase input termination of comparator, the output of comparator form charging over-current signal difference
Connect the CP ends of main control MCU and latch.
Below with reference to drawings and examples, the present invention is described in detail.
Brief description of the drawings
Fig. 1 theory diagrams of the embodiment of the present invention.
Embodiment
Embodiment 1 as shown in figure 1, the present embodiment be it is a kind of control lithium battery group between circulation energy storage battery management system,
Including operational amplifier, comparator, MCU, latch, inspection leakage resistance, charging MOS, electric discharge MOS；This programme is in inspection leakage resistance two
End is another to draw differential signal all the way and arrives accurate amplifier, and amplifier output is connected to the positive input terminal of comparator, and the negative input of comparator
End is connected to MCU DAC delivery outlets, MCU can numeral the analog voltages of DAC mouths, the output conduct all the way of comparator are set
MCU interrupt trigger signal, clock signal of the another way as d type flip flop, the output of d type flip flop negate the control with charging MOS
Signal phase processed with.Therefore when the charge over-current condition of setting meets, d type flip flop road signal with charging MOS control signals phase with
For zero level, turn off charging MOS, retain charging current limiter module conducting, so as to which prestissimo is switched to current limliting module, effectively prevent
Charging current is big, burns out charging MOS, and another way enters MCU, and triggering is interrupted, and interrupt processing software switching-off charging MOS can software
Delay carries out recharging overcurrent protection.
For prior art in BMS battery bag parallel connections, sampling charging current closes MOS when arriving at charging overcurrent protection value,
Switch current limiting plate current-limiting charge.Process includes sample rate current, software processing, closes charging MOS, more than time-consuming time Millisecond,
Serious hysteresis, now possible MOS bombings, and large current charge has necessarily injured to battery core.The present embodiment uses two
All the way, MCU is input to cut-out charging MOS from interruption, is switched to current limliting for level charging excessively stream short-circuit protection, wherein excessively stream interrupting input
Plate current-limiting charge only needs 5 delicate, and it is several nanoseconds that the pure hardware exchange current limiting plate current-limiting charge of another way, which expends the time,.In addition originally
Embodiment is synchronous to open charging MOS and charging current limiter plate when detecting charging, when charging current arrives at charging overcurrent value,
Turn off charging MOS, charging current charges without the time difference through current limiting plate.
Implement in communication base station lithium power battery pack intelligent management system BMS projects in the present embodiment, communication base station
Interior script uses 48V Acid Battery Systems, the feature of environmental protection, long-life and high-energy-density based on lithium battery, in addition national policy
Inclination, just gradually substituted by ferric phosphate lithium cell, based on the original 48V power-supply systems in base station, 16 strings (or 15 strings) need to be used
Ferric phosphate lithium cell series connection series connection.
In order to reach electric power needed for equipment in computer room, it is necessary to multiple battery bags are parallel extended, battery bag parallel process
In, the pressure difference of parlor result in the presence of circulation, due to lithium battery internal resistance very little, can also be produced even if less pressure difference very big
Circulation.
Equipped with high-power direct-current switch power source in communication base station room, the charging of 48V lead-acid batteries is originally used for, lithium battery is more
After changing lead-acid battery, still continue to use as lithium cell charging power supply, to protect battery, the BMS of protection board producer design is more with charging
Current limiting plate.
Lithium battery group supplies electricity to base station equipment power supply by city under normal circumstances as back-up source, in civil power, and lithium battery group
In floating charge state, once civil power powers off, lithium battery group gives base station equipment uninterrupted power supply.
The present embodiment is by the charging MOS both ends in charge circuit and upper Constant Current Load, Constant Current Load electric current pass through upper
Machine numeral setting, technological core are the control of Constant Current Load incision, and software and hardware combining is realized that Constant Current Load is cut at a high speed, realized
Protection to charging MOS and battery core, and use software and hardware two-step evolution, it is ensured that real-time high reliability.
Claims (2)
1. the energy storage battery management system of circulation between a kind of control lithium battery group, including current detection circuit, control circuit.It is described
The input of battery pack that is detected according to current detection circuit of control circuit or output current realize to charging metal-oxide-semiconductor and put
The driving of electric metal-oxide-semiconductor, it is characterised in that：Described control circuit includes front-end A FE circuits, main control MCU, latch, described
Front-end A FE circuits connect battery pack and main control MCU, and charging over-current signal enters latches, latch caused by main control MCU
Charge switch signal caused by producing pass charging signals and main control MCU connects the input with logic gates, gate electricity respectively
The output termination charging metal-oxide-semiconductor on road and the MOS drive devices for the metal-oxide-semiconductor that discharges.
2. the energy storage battery management system of circulation between control lithium battery group according to claim 1, it is characterised in that：It is described
Current detection circuit include inspection leakage resistance, operational amplifier, comparator, described inspection leakage resistance is arranged on the negative pole of battery pack
Between B- and charging bag negative pole, the in-phase input end and out-phase input of described operational amplifier connect the two of inspection leakage resistance respectively
End, wherein, the negative pole B- sides of the homophase input termination battery pack of described operational amplifier；Described operational amplifier output terminal
The in-phase input end of comparator is connect, the main control MCU described in the out-phase input termination of comparator, the output of comparator, which is formed, charged
Stream signal connects the CP ends of main control MCU and latch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043001.8A CN107342600A (en) | 2017-01-19 | 2017-01-19 | The energy storage battery management system of circulation between a kind of control lithium battery group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043001.8A CN107342600A (en) | 2017-01-19 | 2017-01-19 | The energy storage battery management system of circulation between a kind of control lithium battery group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342600A true CN107342600A (en) | 2017-11-10 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710043001.8A Pending CN107342600A (en) | 2017-01-19 | 2017-01-19 | The energy storage battery management system of circulation between a kind of control lithium battery group |
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| CN (1) | CN107342600A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108958119A (en) * | 2018-07-23 | 2018-12-07 | 欣旺达电动汽车电池有限公司 | A kind of logic control scheme of battery management system auto sleep |
| CN109217426A (en) * | 2018-10-17 | 2019-01-15 | 江苏博强新能源科技股份有限公司 | battery management system and method for communication base station |
| CN111262228A (en) * | 2018-12-03 | 2020-06-09 | 华大半导体有限公司 | Current-limiting protection device and motor driving chip |
| CN111404111A (en) * | 2020-03-16 | 2020-07-10 | 阳光电源股份有限公司 | Driving method and driving circuit of relay |
| JP2022542721A (en) * | 2020-06-17 | 2022-10-07 | 東莞新能安科技有限公司 | Battery protection circuit, battery management system, battery device and control method thereof |
| WO2024001601A1 (en) * | 2022-06-27 | 2024-01-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| CN101567475A (en) * | 2008-04-22 | 2009-10-28 | 天津泛海科技有限公司 | Lithium battery/battery pack measuring and protecting method based on current subsection detecting technique |
| CN202183620U (en) * | 2011-08-23 | 2012-04-04 | 福建睿能电子有限公司 | Multi-section serial lithium battery pack equalization and protection system |
| CN102636690A (en) * | 2012-04-28 | 2012-08-15 | 哈尔滨工业大学 | Voltage controlled delay chain-based time domain successive approximation digital intelligent battery current detection circuit and realizing method thereof |
| CN103972869A (en) * | 2014-04-18 | 2014-08-06 | 深圳市诺比邻科技有限公司 | Dual-protection system and method for batteries |
| US20150263391A1 (en) * | 2014-03-13 | 2015-09-17 | Samsung Sdi Co., Ltd. | Battery pack |
-
2017
- 2017-01-19 CN CN201710043001.8A patent/CN107342600A/en active Pending
Patent Citations (5)
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| CN101567475A (en) * | 2008-04-22 | 2009-10-28 | 天津泛海科技有限公司 | Lithium battery/battery pack measuring and protecting method based on current subsection detecting technique |
| CN202183620U (en) * | 2011-08-23 | 2012-04-04 | 福建睿能电子有限公司 | Multi-section serial lithium battery pack equalization and protection system |
| CN102636690A (en) * | 2012-04-28 | 2012-08-15 | 哈尔滨工业大学 | Voltage controlled delay chain-based time domain successive approximation digital intelligent battery current detection circuit and realizing method thereof |
| US20150263391A1 (en) * | 2014-03-13 | 2015-09-17 | Samsung Sdi Co., Ltd. | Battery pack |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108958119A (en) * | 2018-07-23 | 2018-12-07 | 欣旺达电动汽车电池有限公司 | A kind of logic control scheme of battery management system auto sleep |
| CN109217426A (en) * | 2018-10-17 | 2019-01-15 | 江苏博强新能源科技股份有限公司 | battery management system and method for communication base station |
| CN111262228A (en) * | 2018-12-03 | 2020-06-09 | 华大半导体有限公司 | Current-limiting protection device and motor driving chip |
| CN111404111A (en) * | 2020-03-16 | 2020-07-10 | 阳光电源股份有限公司 | Driving method and driving circuit of relay |
| JP2022542721A (en) * | 2020-06-17 | 2022-10-07 | 東莞新能安科技有限公司 | Battery protection circuit, battery management system, battery device and control method thereof |
| JP7377860B2 (en) | 2020-06-17 | 2023-11-10 | 東莞新能安科技有限公司 | Battery protection circuit, battery management system, battery device and its control method |
| WO2024001601A1 (en) * | 2022-06-27 | 2024-01-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20171110 |