CN107612115A - Airborne lithium battery group is thrown and moves back power grid control method and control device - Google Patents
Airborne lithium battery group is thrown and moves back power grid control method and control device Download PDFInfo
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- CN107612115A CN107612115A CN201710667374.2A CN201710667374A CN107612115A CN 107612115 A CN107612115 A CN 107612115A CN 201710667374 A CN201710667374 A CN 201710667374A CN 107612115 A CN107612115 A CN 107612115A
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- lithium battery
- fairing
- electrical isolation
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Abstract
The present invention relates to power system design technical field, specifically provide a kind of airborne lithium battery group throwing and move back power grid control method, by judging whether the electrical isolation between the fairing of direct current network and lithium battery is effective, to determine the electrical connection of cut-out/between connection fairing and lithium battery, thrown present invention also offers a kind of airborne lithium battery group and move back power grid control method control device, detect whether the both ends pressure drop of electrical isolation part and lithium battery have reverse sink current by lithium battery controller, and then control the break-make for connecting contactor, to realize that the function of power network is moved back in lithium battery throwing, and it is aircraft emergency service.
Description
Technical field
The present invention relates to power system design technical field, more particularly to airborne lithium battery group throw move back power grid control method and
Control device.
Background technology
Airborne battery, make as uninterrupted power source, emergency start engine, emergency service and adjustment power supply quality
With.In-flight, the emergent power network of the generally always on direct current of battery, it is in parallel with other dc sources, ensure that electric power system enters
The reliability and conversion time that emergency service is changed under emergency rating are as short as possible.
As battery technology develops, lithium-ions battery system has progressively substituted traditional cadmium-nickel accumulator should nearly ten years
For in airborne electric power system, being used as emergency power supply, accessory power supply.Lithium-ions battery main advantage is small volume, again
Amount is light, bigger than energy.Lithium battery system volume, the weight of equivalent capability only have 1/3rd of Cadmium Nickel Battery.
However, although lithium battery system technical advantage is obvious, there is also intrinsic two weakness for it：
1st, security --- lithium battery is more much smaller than other battery volumes, weight under equivalent capability, illustrates lithium battery interior
Chemical material activity is big.Relative, it is less better that its security naturally also compares other batteries, in recent years Boeing 787 and Air Passenger 380
The lithium battery burnout failure of appearance has shown this point；
2nd, " floating " charging can not be carried out --- the dc source that can not will be above lithium battery output end voltage is directly in parallel
To the cathode output end of lithium battery, it otherwise can cause the thermal runaway of lithium battery, because lithium-ions battery can not " floating charging "
Feature, cause it directly used in parallel with other DC power systems, and, it is necessary to lithium-ions battery in airplane design
The emergency dynamo parallel operation that group drives with two fairings, a ram-air turbine.For this reason, it may be necessary to study lithium
Ion accumulator group and the control technology scheme of other DC power system parallel operations.
The content of the invention
To overcome at least one defect existing for above-mentioned prior art, throw and move back the invention provides a kind of airborne lithium battery group
The fairing of power grid control method, wherein lithium battery and direct current network is in parallel, as follows the step of the control method：
Fairing during band full-load current, makes the output voltage of fairing be higher than lithium battery group in DC power system
Fully charged floating voltage；
By the electrical isolation part that is connected between fairing and lithium battery to being carried out between fairing and lithium battery
Electrical isolation, prevent fairing from carrying out floating charging to lithium battery；
Monitored in real time by lithium battery controller and judge whether above-mentioned electrical isolation is effective, specific judgment mode is：Inspection
Survey whether the both ends pressure drop of electrical isolation part and lithium battery have reverse sink current, if pressure drop is less than electrical isolation part conduction voltage drop and anti-
Be more than the reverse floating charging safe current of lithium battery to sink current, then judge electrical isolation fail, if electrical isolation failure cause it is whole
Flow device and carry out floating charging to lithium battery, then lithium battery controller disconnects the connection between fairing and lithium battery；
When the connection disconnection between fairing and lithium battery and failure in rectifying device, cut off fairing and direct current should
The connection of anxious busbar, lithium battery controller connect lithium battery and the emergent busbar of direct current after receiving the shutoff signal.
Thrown present invention also offers a kind of airborne lithium battery group and move back power grid control device, including lithium battery controller, connection
Contactor and electrical isolation part, electrical isolation part are high-power isolating diode, and its positive pole connects with lithium battery anode, negative pole and
The connection of contactor one end is connected, the contactor other end is connected and is connected with the positive pole of the fairing of direct current network, lithium battery control
Device connects with contactor is connected, for detecting whether the both ends pressure drop of electrical isolation part and lithium battery have reverse sink current, and control
The break-make of turn-on contactor.
Airborne lithium battery group provided by the invention, which is thrown, moves back power grid control method and control device, solves lithium-ions battery
Group can not be directly parallel in the technical barrier to be worked on direct current busbar, apply large-capacity high-power lithium battery technology and flying
Turn into feasible on device, and technology solution route is provided for the safe handling of lithium battery from system design, simultaneously for flight
Device and its other equipment in addition need to use lithium-ions battery group and the situation of other dc source parallel operations also to have
Higher use, reference, reference value.
Brief description of the drawings
Fig. 1 is the external characteristic curve figure of direct current network fairing；
Fig. 2 is that airborne lithium battery group throws the connection relationship diagram for moving back power grid control device.
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.
It should be noted that：The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to for explaining this hair
It is bright, and be not considered as limiting the invention.In the accompanying drawings, same or similar label represents same or like from beginning to end
Element or with same or like function element.Described embodiment is part of the embodiment of the present invention, rather than entirely
The embodiment in portion, in the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
During DC power system normal work, powered to the load by fairing.DC power system enters emergency rating,
Start the emergent DC power generation system work of RAT drivings.During emergent DC power generation system failure, due to airborne emergency load not
It can tolerate 7s power down or voltage abnormal time, therefore lithium battery group can only take the mode of parallel connection to be connected to the emergent remittance of direct current
Flow on bar.When above-mentioned several dc sources are unable to normal power supply, by lithium-ions battery group emergency service.Therefore, setting
When counting lithium-ions battery group with other dc source parallel operations, what is considered at first is, it is necessary to the electricity of each power supply of collaborative design
Flattening bench system, avoids the power work that should not be worked, and the power supply cisco unity malfunction that should be worked.
Fairing is open loop power supply, and output voltage reduces with the increase of output current, its external characteristic curve such as Fig. 1
It is shown.
When system is fully loaded with (250A) work, if lithium battery output voltage is higher than 25.8V, in a fully loaded state, rectification
The power supply loaded on device and lithium battery shared machine, causes lithium battery group surprisingly to be put under fairing non-failure case
Electricity.Therefore, in order to meet the basic demand of parallel operation, the voltage platform of lithium-ions battery group should be designed as 21~25V.
Design will each DC power output voltage platform in parallel can cooperate after, it is necessary to consider due to lithium battery not
The inherent characteristic of energy " floating charging ", when being connected for lithium battery with open loop DC power sources in parallel, should set isolating diode to carry out
Isolation；During for lithium battery and the dc source parallel operation of closed loop Regulation Control, lithium battery voltage and closed loop should be must assure that
Consistent (in the range of certain regulation precision) or slightly higher, the normally no higher than 0.5V of adjusting pressuring dc power steady state output voltage.
Increased any device has the possibility of failure.Isolating diode is no exception.Analyze the failure of isolating diode
Pattern：1) short circuit inside diode；2) diode open-circuit.If diode either open failure, lithium battery and busbar can be disconnected
Connection.If short circuit inside diode, can cause the floating charging of lithium battery, thermal runaway occurs when serious.Therefore, for isolation two
Short circuit fault mode is, it is necessary to be controlled management inside pole pipe.
It can not be connected directly between on direct current busbar and other dc source parallel operations for lithium-ions battery group
Problem, the rectification for moving back power grid control method, wherein lithium battery and direct current network is thrown the invention provides a kind of airborne lithium battery group
Device is in parallel, as follows the step of the control method：
Fairing during band full-load current, makes the output voltage of fairing be higher than lithium battery group in DC power system
Fully charged floating voltage；
By the electrical isolation part that is connected between fairing and lithium battery to being carried out between fairing and lithium battery
Electrical isolation, prevent fairing from carrying out floating charging to lithium battery；
Monitored in real time by lithium battery controller and judge whether above-mentioned electrical isolation is effective, specific judgment mode is：Inspection
Survey whether the both ends pressure drop of electrical isolation part and lithium battery have reverse sink current, if pressure drop is less than electrical isolation part conduction voltage drop
(0.5V) and reversely sink current is more than the reverse floating charging safe current (35A) of lithium battery, then judges that electrical isolation fails, if electrically
Isolated failure causes fairing to carry out floating charging to lithium battery, then lithium battery controller is disconnected between fairing and lithium battery
Connection；
When the connection disconnection between fairing and lithium battery and failure in rectifying device, cut off fairing and direct current should
The connection of anxious busbar, lithium battery controller connect lithium battery and the emergent busbar of direct current after receiving the shutoff signal.Lithium electricity
Pond floating charging problem only occur on machine also have other dc source normal works in the case of.When airborne electric power system enters
Emergency rating, fairing failure, after starting DC supply for emergency system, DC supply for emergency system again can not normal work
, then do not possess the condition of lithium battery floating charging now, then the battery disconnected by isolating diode short circuit failure is connected
Contactor should be again switched on, and lithium battery is powered to busbar, ensure that the safety of aircraft is maked a return voyage landing.
Meanwhile thrown present invention also offers a kind of airborne lithium battery group and move back power grid control device, as shown in Fig. 2 including lithium
Battery controller, connection contactor (being represented in figure with BTC) and electrical isolation part, electrical isolation part are the high-power pole of isolation two
Pipe, its positive pole connect with lithium battery anode, and negative pole connects with contactor one end is connected, and connect the contactor other end and direct current network
Fairing positive pole connection, lithium battery controller and connect contactor connect, for detecting the both ends pressure drop of electrical isolation part
And whether lithium battery has reverse sink current, and the break-make of contactor is connected in control.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (2)
1. a kind of airborne lithium battery group throws power grid control method of moving back, the wherein fairing of lithium battery and direct current network is in parallel, its
It is characterised by, it is as follows the step of the control method：
Fairing during band full-load current, makes the output voltage of fairing be full of higher than lithium battery group in DC power system
The floating voltage of electricity；
It is electric to being carried out between fairing and lithium battery by the electrical isolation part being connected between fairing and lithium battery
Isolation, prevent fairing from carrying out floating charging to lithium battery；
Monitored in real time by lithium battery controller and judge whether above-mentioned electrical isolation is effective, specific judgment mode is：Detection electricity
Whether the both ends pressure drop of air bound off member and lithium battery have reverse sink current, if pressure drop is less than electrical isolation part conduction voltage drop and reversely filled
Electric current is more than the reverse floating charging safe current of lithium battery, then judges that electrical isolation fails, if electrical isolation failure causes rectification to fill
Put to lithium battery and carry out floating charging, then lithium battery controller disconnects the connection between fairing and lithium battery；
When the connection disconnection between fairing and lithium battery and failure in rectifying device, fairing and the emergent remittance of direct current are cut off
The connection of bar is flowed, lithium battery controller connects lithium battery and the emergent busbar of direct current after receiving the shutoff signal.
2. a kind of airborne lithium battery group, which is thrown, moves back power grid control device, it is characterised in that including lithium battery controller, connects contactor
With electrical isolation part, electrical isolation part is high-power isolating diode, and its positive pole connects with lithium battery anode, and negative pole and connection connect
Tentaculum one end connect, connect the contactor other end connect with the positive pole of the fairing of direct current network, lithium battery controller with connect
Tentaculum connection is connected, for detecting whether the both ends pressure drop of electrical isolation part and lithium battery have reverse sink current, and control is connected
The break-make of contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710667374.2A CN107612115A (en) | 2017-08-07 | 2017-08-07 | Airborne lithium battery group is thrown and moves back power grid control method and control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710667374.2A CN107612115A (en) | 2017-08-07 | 2017-08-07 | Airborne lithium battery group is thrown and moves back power grid control method and control device |
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| CN201710667374.2A Pending CN107612115A (en) | 2017-08-07 | 2017-08-07 | Airborne lithium battery group is thrown and moves back power grid control method and control device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288853A (en) * | 2018-04-04 | 2018-07-17 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Aircraft DC power supply system and method for supplying power to |
| CN108390367A (en) * | 2018-03-15 | 2018-08-10 | 国网江苏省电力有限公司检修分公司 | DC power-supply system parallel device and its control method |
| CN110979706A (en) * | 2019-10-11 | 2020-04-10 | 中国直升机设计研究所 | Dual-voltage helicopter power supply system |
| CN112910029A (en) * | 2021-01-18 | 2021-06-04 | 四川腾盾科技有限公司 | Unmanned aerial vehicle power quality boost circuit |
| CN113765211A (en) * | 2021-10-09 | 2021-12-07 | 陕西航空电气有限责任公司 | Method for uninterrupted power supply of direct-current emergency bus bar in aviation power distribution system |
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| JP2003087994A (en) * | 2001-09-10 | 2003-03-20 | Nec Viewtechnology Ltd | Power supply backup circuit and reverse current consuming circuit |
| CN1783640A (en) * | 2004-11-22 | 2006-06-07 | 因温特奥股份公司 | Integrity testing of isolation means in an uninterruptible power supply |
| CN105576776A (en) * | 2016-03-08 | 2016-05-11 | 武汉瑞源电力设备有限公司 | Lithium ion storage battery power and communication DC power system |
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2017
- 2017-08-07 CN CN201710667374.2A patent/CN107612115A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003087994A (en) * | 2001-09-10 | 2003-03-20 | Nec Viewtechnology Ltd | Power supply backup circuit and reverse current consuming circuit |
| CN1783640A (en) * | 2004-11-22 | 2006-06-07 | 因温特奥股份公司 | Integrity testing of isolation means in an uninterruptible power supply |
| CN105576776A (en) * | 2016-03-08 | 2016-05-11 | 武汉瑞源电力设备有限公司 | Lithium ion storage battery power and communication DC power system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390367A (en) * | 2018-03-15 | 2018-08-10 | 国网江苏省电力有限公司检修分公司 | DC power-supply system parallel device and its control method |
| CN108390367B (en) * | 2018-03-15 | 2020-12-01 | 国网江苏省电力有限公司检修分公司 | Parallel device of direct current power supply system and control method thereof |
| CN108288853A (en) * | 2018-04-04 | 2018-07-17 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Aircraft DC power supply system and method for supplying power to |
| CN108288853B (en) * | 2018-04-04 | 2024-05-28 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Direct current power supply system and power supply method for airplane |
| CN110979706A (en) * | 2019-10-11 | 2020-04-10 | 中国直升机设计研究所 | Dual-voltage helicopter power supply system |
| CN110979706B (en) * | 2019-10-11 | 2022-12-30 | 中国直升机设计研究所 | Dual-voltage helicopter power supply system |
| CN112910029A (en) * | 2021-01-18 | 2021-06-04 | 四川腾盾科技有限公司 | Unmanned aerial vehicle power quality boost circuit |
| CN113765211A (en) * | 2021-10-09 | 2021-12-07 | 陕西航空电气有限责任公司 | Method for uninterrupted power supply of direct-current emergency bus bar in aviation power distribution system |
| CN113765211B (en) * | 2021-10-09 | 2024-03-01 | 陕西航空电气有限责任公司 | Uninterrupted power supply method for direct-current emergency bus bar in aviation power distribution system |
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Application publication date: 20180119 |