CN109799414A - A kind of intelligence bypass diode module and batteries monitoring system - Google Patents
A kind of intelligence bypass diode module and batteries monitoring system Download PDFInfo
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- CN109799414A CN109799414A CN201910113280.XA CN201910113280A CN109799414A CN 109799414 A CN109799414 A CN 109799414A CN 201910113280 A CN201910113280 A CN 201910113280A CN 109799414 A CN109799414 A CN 109799414A
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- bypass diode
- diode module
- power source
- bypass
- intelligence
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of intelligent bypass diode modules, it include two concatenated bypass diodes and two groups of concatenated RC parallel circuits in module, between the midpoint of the inline bypass diode and the midpoint of series RC circuit, connect an AC power source, the AC power source and two bypass diodes, two RC circuits constitute " H " shape bridge, alternating current forces two bypass diode alternate conductions, cut-off, to form a signal voltage at the midpoint of series RC circuit, monitoring is synchronized to this signal voltage by window comparator, can two bypass diode of accurate judgement open circuit whether, so realize On-line self-diagnosis function whether bypass second level tube failure, this intelligence bypass diode module greatly improves the reliability of entire battery pack.
Description
Technical field
The present invention relates to backup power supply technical fields, the in particular to maintenance and monitoring system of series-connected cell group.
Background technique
Battery is as a kind of backup power supply, because can almost accomplish the characteristic of " seamless " switching (< 2mS), therefore in all trades and professions
Middle applicating history is long.It is small to office equipment (such as computer) greatly to the backup of relay protection device in electric substation
UPS。
Backup power supply, due to its " standby " identity, it is necessary to have the characteristic of " the i.e. use come as soon as called, come ".So even if
The complete situation of each battery unit must also be monitored the moment in dormant state.Specifically, being exactly not only to be responsible for battery pack
The real time scan (detection voltage, internal resistance) of interior each battery unit, also periodically will carry out the maintenances such as activation discharge to battery
Work.Therefore backup power supply and its monitoring to maintain equipment, frequently referred to DC back-up power supply system.
To further increase reliability, also propose in the industry in the side of each battery unit both ends bypass diode in parallel again
Case, to cause the collapse of entire battery pack when preventing some battery unit catastrophic failure.
If there is internal resistance increase, even open-circuit fault in certain battery unit, due to the presence of bypass diode, fail battery list
Member " can be bypassed " and " be exited " with realizing automatic seamless.The output voltage of entire battery pack at this time only has lost one
The cell voltage (such as 12V) of unit adds diode forward pressure drop (0.7~1V) again.This is not affected in most occasions
Work.
The addition of bypass diode is the reliability in order to improve battery pack entirety originally, but new failure has also been introduced
Factor.Although the failure probability of bypass diode is extremely low, because it usually just works on the backward voltage lied prostrate ten more, eventually
It is " hidden danger ".For technical standpoint, bypass diode is especially opened a way, previous monitoring system is " muddy just in case failing
Do not know so ".And this does not allow technically！Therefore it must try to be monitored the open failure of bypass diode.
Summary of the invention
In order to solve the problems, such as that existing bypass diode can not be detected under open failure state, the present invention is provided
It is a kind of can monitor itself whether the intelligent bypass diode module of open failure.
To achieve the goals above, present invention provide the technical scheme that a kind of intelligence bypass of band failure self-checking function
Diode (led) module, including two concatenated bypass diodes are connected with AC power source between described two bypass diodes, described
AC power source is also connected with there are two concatenated RC parallel circuit and window comparator, described two bypass diodes, two RC
Parallel circuit and the AC power source constitute a H-shaped bridge structure.
Further, the output end of the window comparator is connected with microprocessor.
The AC power source is connect with microprocessor as a preferred technical solution, the output waveform of the AC power source
For square wave, output frequency is 500~2kHz.
In addition, the microprocessor is connected with step-up transformer, the output end of the step-up transformer is exchanged with described
Power supply coupling.
On that basis of the above technical scheme, the midpoint of series RC circuit reconnects a window comparator.Window comparator
Two output ends, on the one hand drive two light emitting diodes, the local instruction as two bypass diode states；On the other hand
With microprocessor interface, the status information of two bypass diodes is provided out by means of communication interface.
As an additional function, heretofore described microprocessor, moreover it is possible to carry out real-time sampling to cell voltage.
I.e. the present invention is also integrated in backup power system, the voltage polling function of each battery unit of series-connected cell group.
As a preferred embodiment, the power supply of all parts of the present invention, by the switching mode pressure stabilizing electricity of a wide input range
Source circuit can directly be derived from module battery unit in parallel.
In addition, the first diode and second diode are arranged in main casing, other circuits are arranged in subshell
In body, thermal baffle is equipped between the main casing and the sub-shell.
In the above-mentioned technical solutions, it is preferred that the bottom of the main casing is equipped with radiating bottom plate.
In the above-mentioned technical solutions, the sub-shell is equipped with status indicator lamp, the status indicator lamp and microprocessor
Connection.
In addition, the present invention also provides a kind of battery pack intelligent monitor system, the above-mentioned battery pack intelligence including multiple parallel connections
Monitoring module, the microprocessor of the battery pack intelligence bypass diode module are connected with 485 driving circuits, 485 driving
The output end of circuit is connected with transformer, and the output end of the transformer is connect with 485 buses, is connected in 485 bus
Host computer and monitor terminal.
Within the system, it is preferred that be also connected with multiple freewheeling diodes on 485 driving circuit.
The beneficial effect of the present invention compared with the existing technology is: the intelligence bypass diode module, concatenated by two
Then bypass diode forces two bypass diode alternate conductions, cut-off by an AC power source, cooperates window comparator
Etc. a set of circuit specially designed, whether judging the open circuit of bypass diode, the online failure of bypass diode is realized certainly
The function of inspection utmostly improves the reliability of series-connected cell group in backup power system.Due to joined microprocessor, even
Band is integrated with the battery cell voltage inspection function for battery pack of contacting in backup power system, and it is logical even more easily to realize bus type
Telecommunication function.
Detailed description of the invention
Fig. 1 is the main measuring circuit schematic diagram of intelligent bypass diode module；
Fig. 2 is the overall structure functional block diagram of intelligent bypass diode module；
Fig. 3 is the voltage waveform of two bypass diodes series RC circuit midpoint O under normal conditions；
Fig. 4 is the structure chart of intelligent bypass diode module；
Fig. 5 is the inside annexation figure of intelligent bypass diode module；
Fig. 6 is the series winding batteries monitoring system schematic diagram being made of intelligent bypass diode module；
Fig. 7 is the 485 Principle of Communication figures that data are driven after Manchester's code by transformer isolation.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
A kind of intelligence bypass diode module, as shown in Figure 1.It is connected between the positive electrode and negative electrode of each battery unit
The anode of two concatenated bypass diode PD1 and PD2, PD1 are connect with the cathode of PD2.It is another that there are two concatenated RC electricity in parallel
Road R1 (C1), R2 (C2).Between the contact and R1 (C1) and R2 (C2) contact of PD1 and PD2, it is connected with an AC power source
The window comparator that ME, resistance R3, resistance R4, light emitting diode VD, comparator A1 and comparator A2 are constituted.R1 (C1) with
R2 (C2) contact O accesses window comparator through resistance R0.Two light emitting diode LD1, LD2 of the output termination of window comparator two.
ME is independent measurement AC power source in Fig. 1, and in the present embodiment, the output waveform of AC power source is square wave,
Output frequency is 500~2kHz.Effect is to force two bypass diode PD1, PD2 alternate conductions, cut-off.If two bypasses
Diode is normal, then equivalent charging, the half of the level of midpoint O close to cell voltage will be obtained on capacitor C1, C2.
In fact since C1, C2 will also discharge, so the level of midpoint O is to make the period near half battery voltage value
Property variation it is as shown in Figure 3.But this does not influence the elaboration of following testing principle.
If upper tube PD1 opens a way, because C1 cannot charge, midpoint O level must rise, otherwise PD2 open circuit, midpoint O level
It must decline.VD is a light emitting diode, here with the forward voltage drop (such as green luminotron) of its 2V or so, generates window comparator
Required window voltage.
(for convenient for narration, the voltage that battery unit is assumed below is 12V)
If midpoint O level is higher than 7V, comparator A1 output is low, and indicator light LD1 is lighted, while (no through diode ID1 isolation
Same level), from IO1 line export, for microprocessor perception PD1 open-circuit condition.
If midpoint O level is lower than 5V, comparator A2 output is low, and indicator light LD2 is lighted, while (no through diode ID2 isolation
Same level), from IO2 line export, for microprocessor perception PD2 open-circuit condition.
As shown in Fig. 2, the output end of window comparator is connected with Micro-processor MCV, the Micro-processor MCV is by the battery
Unit power supply, in the present embodiment, MUC uses the single-chip microcontroller of model STC15W408AS.
This detection AC power source ME is produced in a manner of push-pull output by two output pins Wo1, Wo2 of microprocessor
It is raw.Again through 1:2 step-up transformer isolation coupling into Fig. 2 between two midpoint AC power source ME.Can so it meet independent (untotal
Ground) feed requirement.If between MCU and transformer plus H bridge drives, the 1:1 transformer convenient for buying can be selected, also
The load of Micro-processor MCV can be mitigated.
Such as Fig. 2, the interface of two state output of window comparator and Micro-processor MCV is S1, S2, battery voltage sampling interface
For Ai.R7, R8 divide 12V cell voltage to 4V, microprocessor samples, conversion for 5V power supply.
It can accurately reflect whether bypass diode is in open-circuit condition by the testing result of window comparator, and
And the detection frequency is high, is the detection under presence, will not influence the normal work of battery pack, greatly improve battery pack
Reliability.
As shown in Figure 4 and Figure 5, two bypass diodes are arranged 1 in main casing, other circuits are arranged in sub-shell 2,
Thermal baffle 3 is equipped between main casing 1 and the sub-shell 2,2 part of accessory body shell is designed as individual space, and inside is two
Pole pipe open circuit measurement circuit, battery voltage sampling, Intelligent treatment and telecommunication circuit etc., are referred to as measuring unit.Measuring unit is set
In (separating with principal space) in separate space, be conducive to the fever tube core far from two bypass diodes.
Further, the bottom of main casing 1 is equipped with radiating bottom plate 4.Radiating bottom plate 4 does not extend to the survey of accessory body shell 2
Measure unitary space.This is in order to which measuring unit is as far as possible far from this heater of diode chip.
In the above-mentioned technical solutions, sub-shell 2 is equipped with status indicator lamp 21.
Connecting line between diode and measuring circuit uses high temperature resistant line, line footpath 0.5mm, insulating layer outer diameter 2mm.With
It connected between the pole plate of double diode using pressure welding, ensure electric conductivity and bonding strength.
In addition, the present invention also provides a kind of battery pack intelligent monitorings on the basis of above-mentioned intelligent bypass diode module
System, as shown in fig. 6, the system includes multiple above-mentioned intelligent bypass diode modules in parallel, intelligent bypass diode module
Microprocessor be connected with 485 driving circuits, the output end of 485 driving circuit is connected with transformer, the transformer
Output end is connect with 485 buses, and 485 bus is connected with dedicated monitor terminal.
Battery cell voltage is taken to power " on the spot " since battery pack intelligent monitored control module uses, therefore its great advantage is to connect
Line is convenient, and scene no longer needs to wiring power supply.But this " self-powered " mode also brings a problem: between each module not altogether,
Therefore, 485 communications must be isolated.It will be specifically described 485 communication isolating schemes of the invention below.
As shown in fig. 7,485 communication isolating schemes of the invention are transformer isolations.Not using common light in the market
The Magnetic isolation chip of coupling isolation scheme and ADI company.The reason is that: 1, of the present invention module using " self-powered " that simplifies field wiring
Scheme, power supply are exactly each battery unit in a backup power system in battery pack；2, the access of bypass diode is just
It is defence individual cells failure, so module can fail with the failure of battery unit；3, when 485 communication nodes fail such as
What automatically disengages bus without other nodes in " tying down " entire bus, is that must solve the problems, such as.And transformer isolation coupling
It closes, is exactly best coupling scheme！
But transformer coupled also to have a fatal defects: the signal exactly transmitted must be pure exchange！
So unipolarity non-return-to-zero (TTL) signal that the present invention exports microprocessor serial ports, has carried out Manchester volume
Code.Each byte split is the Manchester code of two bytes, then gives 485 chip drives.Since 485 driving chips are differential
Output, therefore Manchester code signal is through differential output, is exactly a kind of pure AC signal.
Due to using 485 drivings, anti-interference ability is higher, therefore can use higher baud rate, such as 57600bps, such as
This can make up the decline of Manchester's code bring communication efficiency.Higher baud rate can also make isolating transformer use smaller
Volume.The present invention using permalloy iron core transformer.
D1~D4 in Fig. 7 is the safety driving for communication isolating transformer and is specially accommodated.Because of 485 chips
Bus driver, though inside is push-pull configuration, not H bridge structure, without freewheeling diode.So four two external here
Pole pipe, for absorbing Kickback voltage caused by primary inductance leakage inductance.
485 communications are carried out by using the mode that transformer isolation couples, so that the anti-interference ability of entire monitoring system
Enhancing is also easy to use higher high bit rate, improves communication efficiency.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (9)
1. a kind of intelligence bypass diode module, it is characterised in that: including two concatenated bypass diodes, described two bypasses
It is connected with AC power source between diode, the AC power source is also connected with that there are two concatenated RC parallel circuits and window to compare
Device, described two bypass diodes, two RC parallel circuits and the AC power source constitute a H-shaped bridge structure.
2. intelligence bypass diode module according to claim 1, it is characterised in that: the output end of the window comparator
It is connected with microprocessor.
3. intelligence bypass diode module according to claim 1, it is characterised in that: the AC power source and microprocessor
Connection, the output waveform of the AC power source are square wave, and output frequency is 500~2kHz.
4. intelligence bypass diode module according to claim 3, it is characterised in that: the microprocessor is connected with boosting
Transformer, the output end of the step-up transformer are coupled with the AC power source.
5. intelligence bypass diode module according to claim 1, it is characterised in that: described two bypass diode settings
In main casing, other circuits are arranged in sub-shell, and thermal baffle is equipped between the main casing and the sub-shell.
6. intelligence bypass diode module according to claim 5, it is characterised in that: the sub-shell refers to equipped with state
Show that lamp, the status indicator lamp are connect with microprocessor.
7. intelligence bypass diode module according to claim 5, it is characterised in that: the bottom of the main casing, which is equipped with, to be dissipated
Hot bottom plate.
8. a kind of battery pack intelligent monitor system, it is characterised in that: any one of claim 1-6 including multiple parallel connections institute
The intelligent bypass diode module stated, the microprocessor are connected with 485 driving circuits, the output end of 485 driving circuit
It is connected with transformer, the output end of the transformer is connect with 485 buses, and 485 bus can connect dedicated monitor terminal.
9. battery pack intelligent monitor system according to claim 8, it is characterised in that: also connect on 485 driving circuit
It is connected to multiple freewheeling diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113280.XA CN109799414A (en) | 2019-02-13 | 2019-02-13 | A kind of intelligence bypass diode module and batteries monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113280.XA CN109799414A (en) | 2019-02-13 | 2019-02-13 | A kind of intelligence bypass diode module and batteries monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109799414A true CN109799414A (en) | 2019-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910113280.XA Withdrawn CN109799414A (en) | 2019-02-13 | 2019-02-13 | A kind of intelligence bypass diode module and batteries monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596601A (en) * | 2019-08-19 | 2019-12-20 | 华电电力科学研究院有限公司 | Single storage battery open circuit on-line monitoring and automatic bridging method |
-
2019
- 2019-02-13 CN CN201910113280.XA patent/CN109799414A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596601A (en) * | 2019-08-19 | 2019-12-20 | 华电电力科学研究院有限公司 | Single storage battery open circuit on-line monitoring and automatic bridging method |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190524 |
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| WW01 | Invention patent application withdrawn after publication |