CN104701819B - A kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision - Google Patents
A kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision Download PDFInfo
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- CN104701819B CN104701819B CN201310663029.3A CN201310663029A CN104701819B CN 104701819 B CN104701819 B CN 104701819B CN 201310663029 A CN201310663029 A CN 201310663029A CN 104701819 B CN104701819 B CN 104701819B
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Abstract
A kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision, including lowpass pre-filter, voltage compensating circuit, isolation protective circuit, single machine unit, data display unit, peripheral circuit, high-voltage overcurrent protection circuit and difference sample circuit between several multichannel cell voltage monitoring chip, high and low pressure systems.The present invention neither influences the normal work of system, and solve the problems, such as Fault Isolation between cascade chip in the prior art, reaches simple, practical and economic beneficial effect by the way that diode-isolated is added between chip interface cascades.
Description
Technical field
The present invention relates to lithium-ions battery technical field of power management, in particular to a kind of based on the highly integrated lithium electricity of high-precision
Isolating and protecting device in acquisition system.
Background technique
Lithium ion battery technology is widely used in the Flight Vehicle Designs such as various space satellites, airship, lithium ion battery battery
Pressure acquisition system is a key technology solved in lithium ion battery technology, and traditional battery management system device is excessive, electricity
Road and line are complicated, inconvenient maintenance, and reliability is relatively low.Currently, the highly integrated lithium ion battery voltage of multi-channel high-accuracy is adopted
Collecting system is because of its huge advantage high, small in size, light-weight with precision, by the row such as motor vehicles for civilian use electronics, space power
The extensive concern of industry researcher.
But to realize the popularization and use of the technology, it is necessary to Fault Isolation and protection problem in solution system, especially
It is to have special application requirement to core component under complex environment locating for aerospace craft, if improper use or safety
Quarantine measures take the safety of the service life not in place that will have a direct impact on battery and entire lithium electricity acquisition system.Therefore it studies multiple
Insulation blocking technology involved in lithium electricity acquisition system in the case of heterocycle border has promotion the dual-use of this technology
Highly important realistic meaning.
Summary of the invention
The present invention is intended to provide it is a kind of be applicable to the highly integrated lithium ion battery voltage acquisition system of duplex high precision every
From protective device, not only the concatenated Li-ion batteries piles of institute were protected, but also to the highly integrated lithium-ion electric of duplex high precision
Cell voltage acquisition system realizes security isolation protection, improves reliability and safety that lithium ion battery voltage acquisition system uses
Property.
To reach above-mentioned purpose, the present invention provides a kind of insulation blocking based in the highly integrated lithium electricity acquisition system of high-precision
Device includes lowpass pre-filter, voltage compensating circuit, between several multichannel cell voltage monitoring chip, high and low pressure systems
Isolation protective circuit, single machine unit, data display unit, peripheral circuit, high-voltage overcurrent protection circuit and difference sampling electricity
Road；Insulation blocking technology involved in the highly integrated lithium ion battery voltage acquisition system of the duplex high precision includes multichannel
The high pressure of highly integrated lithium electricity monitoring chip, overcurrent protection in high precision, the insulation blocking between high and low pressure system, lithium electricity monitoring chip letter
Fault Isolation between breath stream cascade transmitting is protected and there are the insulation blocking measures in the case of block switch；The Multi-path electricity
Cell voltage monitoring chip carries out circuit connection by cascade mode, and information flow direction is successively by the multichannel battery electricity of cascade top
Pressure monitoring chip flows to the voltage monitoring chip of the bottom, and the voltage monitoring chip of the bottom is connected to described by interface
The secondary side interface of isolation protective circuit between high and low pressure system, the primary side interface of the isolation protective circuit between the high and low pressure system
It is connected to the single machine unit.
The high-voltage overcurrent protection circuit form of the highly integrated lithium electricity monitoring chip of the duplex high precision is transient voltage suppression
Diode processed is concatenated with protective tube, then the VDD feeder ear and VSS reference ground of access voltage monitoring chip in parallel, voltage prison
The input voltage of control core will not have an impact chip when being lower than certain transient voltage, when the input voltage of voltage monitoring core is excessively high
When, due to there is the inhibiting effect of transient voltage suppressor diode to make the supply voltage of the chip, clamper is attached in the voltage always
Closely, play the role of protecting chip；Meanwhile protective tube is concatenated on the current supply circuit, once transient voltage suppressor diode goes out
When existing failure causes the situation of short circuit to occur, the safety of this group of battery pack can protect.
Isolation protective circuit between the high and low pressure system is a set of isolating chip, and wherein primary side connects single-chip microcontroller list
Member, the secondary side connection lithium ion System of voltage acquisition；Since the lithium ion System of voltage acquisition voltage is higher, and it is single
Piece machine unit supply voltage is 5V and 12V, therefore in order to guarantee that it is mono- not influence subsequent CPU when voltage monitoring core breaks down
The function of member and other systems, it is necessary to take some insulation blocking measures.
Fault Isolation protection circuit between the lithium electricity monitoring chip information flow cascade transmitting includes lithium electricity monitoring core
The voltage compensating circuit of Schottky diode and lithium electricity monitoring chip VDD feeder ear between I/O mouthfuls of piece cascades, circuit form is same
The Schottky diode of model；There is cascade failure in cascade chip in order to prevent, need to take between each chip cascade every
From safeguard measure.
The highly integrated lithium ion battery voltage acquisition system of the duplex high precision, installation segmentation is opened in series-connected cell group
It closes, the positive and negative terminal of entire series-connected cell group is also attached to sample circuit, and when whole system works, the folding of block switch can be right
Associated voltage monitoring chip has an impact, and needs the VSS reference ground series resistor in the chip, it is ensured that block switch is opened
It is consistent with battery negative terminal to close moment VSS reference ground current potential.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is the circuit connection diagram of lithium electricity acquisition system of the present invention；
Fig. 2 is the circuit connection diagram of high-pressure and overflowing isolation protective circuit of the present invention；
Fig. 3 is the circuit connecting relation figure of high and low voltage isolation protection circuit of the present invention；
Fig. 4 is the circuit connecting relation of the isolation protective circuit between lithium electricity monitoring chip information flow cascade transmitting of the present invention
Figure；
1 is low-pass filter in figure, and 2 be voltage compensating circuit, and 3 be multichannel cell voltage monitoring chip, and 4 be high-low pressure system
Isolation protective circuit between system, 5 be single machine unit, and 6 be data display unit, and 7 be peripheral circuit, and 8 be high-pressure and overflowing protection
Circuit, 9 be difference sample circuit.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
The present invention is further explained with reference to the accompanying drawing.The preferred embodiment of the present invention be only intended to help illustrate the present invention and
It is not used in and limits the scope of the invention.The preferred embodiment of the present invention details all there is no detailed descriptionthe, does not also limit
The invention is only the specific embodiment.Obviously, it according to the content of this specification, can make many modifications and variations.This
These embodiments are chosen and specifically described to specification, is principle and practical application in order to better explain the present invention, to make
Skilled artisan can utilize the present invention well.The present invention is only by claims and its full scope and equivalent
The limitation of object.After having read the content of the invention recorded, those skilled in the art the present invention can be made it is various change or
Modification, these equivalence changes and modification equally fall into the scope of the claims in the present invention.
A kind of insulation blocking dress based in the highly integrated lithium electricity acquisition system of high-precision according to the present invention is now described in detail
It sets.
Embodiment 1: the highly integrated lithium electricity acquisition system of the high-precision of the present embodiment is as shown in Figure 1, due to consideration that actual
Working environment is more complicated, is used in addition compared with more piece lithium ion battery, therefore whole system needs comprehensive consideration reliability
And safety.It is multiple including the preposition acquisition input channel in n multichannel cell voltage monitoring chip 3 of multiple low-pass filters 1
Voltage compensating circuit 2 carries out voltage compensation for increase isolating diode between the cascade of multiple multichannel cell voltage monitoring chips 3, by
More in the joint number of series winding battery pack, battery voltage is higher, belongs to high-pressure system, and single machine unit 5, data display unit
6 and peripheral circuit 7 used in supply voltage it is lower, it is safe and reliable in order to ensure system, need to increase between high and low pressure system
Isolation protective circuit 4, high-voltage overcurrent protection circuit 8 increases multichannel cell voltage monitoring chip 3 and lithium battery of contacting makes
With safety, service failure risk is reduced, also sampling telemetering is carried out to Li-ion batteries piles in whole system, i.e. difference is adopted
Sample circuit 9.
For high-voltage overcurrent protection circuit as shown in Fig. 2, RT is protective tube in figure, V is that 30V or so transient voltage inhibits two poles
Pipe, the two contact and connect the VDD feeder ear and VSS reference ground with multichannel cell voltage monitoring chip 3, multichannel cell voltage prison
The power supply of control chip 3 is provided by tested battery pack, under charge and discharge electrical environment in order to prevent powered on moment generate a high pressure to
Chip is damaged, so needing to add a transient voltage suppressor diode V in 3 feeder ear of multichannel cell voltage monitoring chip, is pressed down
Instantaneous pressure processed, while powered on moment generates a biggish surge current in order to prevent and transient voltage suppressor diode is short
The case where road, occurs, and other than increasing some filter circuits, also adds protective tube RT, it is ensured that the power supply safety of chip.
Embodiment 2: isolation protective circuit 4 between high and low pressure system as shown in figures 1 and 3, when being contacted in whole system
Lithium ion battery it is more when, series battery voltage is higher, and secondary power supply used in CPU element and peripheral circuit 7 is electric
Pressure is mostly 5V and 12V, belongs to low-pressure system, in order to ensure the isolation of system securely and reliably needed to increase between high and low pressure system is protected
Protection circuit 4, as shown in figure 3, isolating chip as shown in the figure has built-in isolation DC/DC, it is 1401 secondary sides and multichannel battery electricity
The digital voltage feeder ear power supply of monitoring chip 3 is pressed, which is 5V and I/O mouthfuls of incoming ends of CPU element, secondary
Side is the high-pressure system of multichannel cell voltage monitoring chip 3 and battery pack composition of contacting, and realizes the failure between high and low pressure system
Isolation.
Embodiment 3: as shown in Figure 1 and Figure 4, the Fault Isolation between the cascade transmitting of lithium electricity monitoring chip information flow protects electricity
As shown in figure 4, diode V1, V2, V3, V4 are the internal interface circuit structure of multichannel cell voltage monitoring chip 3, V5 is electricity on road
2 diode of compensation circuit, isolating diode of the V6 between chip cascade are pressed, VSS2 is the reference ground for cascading higher level's chip,
VDD1 is the feeder ear for cascading junior's chip, and VPP1 is voltage compensating circuit front end, and when work connect with VSS2, and VSS1 is cascades
The reference ground of junior's chip, VH, VL are respectively the anode and cathode voltage of V6 diode.The lithium electricity of the present embodiment acquires system
System, core are made of the cascade of multiple multichannel cell voltage monitoring chips 3, and information flow transmits from top to bottom, closely coupled,
If, ought wherein some core although will not influence the accurate acquisition of voltage analog according to the circuit connecting of conventional recommendation
Piece because when certain reasons generate failure, can not isolated fault, may cause the damage of other chips in cascade, therefore in chip
Diode-isolated scheme is added between interface cascade, i.e., it is simple and economical；In order to not influence acquisition function, so that information flow normally passes
It passs, it is necessary to ensure that the normally of isolating diode V6 increases voltage compensating circuit, i.e., in chip on original circuit base
Feeder ear increases compensation diode, and VH=VSS2-Vd, VL=VPP1-Vd-Vf, wherein Vd is the tube voltage drop of V2, V3, Vf V5, V6
Tube voltage drop, VSS2=VPP1.The normal work of system is neither influenced in this way, and solves asking for Fault Isolation between cascade chip
Topic, it is simple, practical, economical.
Claims (5)
1. a kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision, it is characterised in that including low pass filtered
Wave device, voltage compensating circuit, multiple multichannel cell voltage monitoring chips, the high-low pressure coupled with the cell voltage monitoring chip
Isolation protective circuit between system, the high-voltage overcurrent protection circuit coupled with the cell voltage monitoring chip, single machine unit,
Data display unit, peripheral circuit and the difference sample circuit that Li-ion batteries piles are carried out with sampling telemetering；The Multi-path electricity
Cell voltage monitoring chip carries out circuit connection by cascade mode, and information flow direction is successively by the multichannel battery electricity of cascade top
Pressure monitoring chip flows to the multichannel cell voltage monitoring chip of the bottom, and the multichannel cell voltage monitoring chip of the bottom is logical
The secondary side interface for the isolation protective circuit that interface is connected between the high and low pressure system is crossed, the isolation between the high and low pressure system is protected
The primary side interface of protection circuit is connected to the single machine unit, is added between multichannel cell voltage monitoring chip interface cascade
Diode；The low-pass filter is preposition in the multichannel cell voltage monitoring chip, and the voltage compensating circuit is for described
Increase isolating diode between multiple multichannel cell voltage monitoring chip cascades and carries out voltage compensation, the display unit and periphery electricity
Road is connected with the single machine unit respectively.
2. isolating and protecting device according to claim 1, it is characterised in that the high-voltage overcurrent protection circuit form is wink
State voltage suppression diode connect and then be connected in protective tube the multichannel cell voltage monitoring chip VDD feeder ear and
VSS reference ground.
3. isolating and protecting device according to claim 1, it is characterised in that higher level's multichannel cell voltage monitoring chip information
Two poles of a resistance to high back-pressure are concatenated on stream interface and the direct-connected route of junior's multichannel cell voltage monitoring chip information stream interface
Pipe.
4. isolating and protecting device according to claim 1, it is characterised in that the insulation blocking electricity between the high and low pressure system
Lu Weiyi group isolating chip, the chip have built-in isolation DC/DC, for secondary side and the multichannel cell voltage monitoring chip
Digital voltage feeder ear power supply.
5. isolating and protecting device according to claim 2, it is characterised in that transient state electricity in the high-voltage overcurrent protection circuit
Constraining diode processed is 30V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310663029.3A CN104701819B (en) | 2013-12-10 | 2013-12-10 | A kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310663029.3A CN104701819B (en) | 2013-12-10 | 2013-12-10 | A kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision |
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| Publication Number | Publication Date |
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| CN104701819A CN104701819A (en) | 2015-06-10 |
| CN104701819B true CN104701819B (en) | 2019-08-06 |
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| CN201310663029.3A Active CN104701819B (en) | 2013-12-10 | 2013-12-10 | A kind of isolating and protecting device based in the highly integrated lithium electricity acquisition system of high-precision |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300280A (en) * | 2016-10-19 | 2017-01-04 | 上海空间电源研究所 | A kind of lithium electricity collecting unit isolating and protecting device |
| CN108964418B (en) * | 2017-05-25 | 2021-08-17 | 中兴通讯股份有限公司 | Voltage sampling circuit and circuit system |
| CN112332492A (en) * | 2020-11-13 | 2021-02-05 | 上海空间电源研究所 | Management system and method of high-voltage multi-group long-string batteries based on magnetic isolation technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201393058Y (en) * | 2009-02-13 | 2010-01-27 | 上海长园维安电子线路保护股份有限公司 | Charge-discharge equalizing protection module of rechargeable battery pack |
| CN103022981A (en) * | 2012-12-28 | 2013-04-03 | 中颖电子股份有限公司 | Protective circuit for cascade of multiple battery strings |
| CN103259253A (en) * | 2013-05-11 | 2013-08-21 | 无锡中星微电子有限公司 | Cascaded battery protection circuit and system thereof |
-
2013
- 2013-12-10 CN CN201310663029.3A patent/CN104701819B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201393058Y (en) * | 2009-02-13 | 2010-01-27 | 上海长园维安电子线路保护股份有限公司 | Charge-discharge equalizing protection module of rechargeable battery pack |
| CN103022981A (en) * | 2012-12-28 | 2013-04-03 | 中颖电子股份有限公司 | Protective circuit for cascade of multiple battery strings |
| CN103259253A (en) * | 2013-05-11 | 2013-08-21 | 无锡中星微电子有限公司 | Cascaded battery protection circuit and system thereof |
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