CN105703460A - Aviation cell management system based on DSP - Google Patents

Abstract

The invention relates to an aviation cell management system based on a DSP. According to the system, the DSP is taken as a control core, rectification filtering, full bridge inversion, high frequency transformation and Buck-Boost circuits are taken as main power circuits, and a power source module, a visualization module and a safety protection module are further taken as auxiliary circuits and are added. During charging, a three-phase solid relay is controlled by the DSP to close, and the main circuits work, and a storage cell is charged; during discharging, PWM waves with a certain duty ratio are emitted by the DSP, the Buck-Boost circuit is controlled, and large-current discharging of the storage cell is realized through a discharging resistor; in a work process, the three-phase AC electricity is timely monitored simultaneously, and a relay switch can be cut off any time when an open-phase or under-voltage phenomenon occurs.

Description

A kind of aeronautical cell based on DSP manages system

Technical field

The present invention relates to a kind of battery management system, particularly to be that a kind of aeronautical cell based on DSP manages system。

Background technology

Aircraft battery is part particularly important in aircraft, is usually used in startup and communication, the illumination of aircraft engine。When the aerial stall of aircraft engine, the startup electromotor that aircraft battery can be direct or indirect, and when main power source non-normal working, each energy device for aircraft provides electric power support。So the safety traffic that aircraft battery is to aircraft, there is highly important function。The power-supply system of aircraft is generally generating for main power source, and accumulator or turbogenerator are stand-by power supply or emergency power supply, when some to volume requirement tighter, it will usually giving up turbogenerator, only selecting aircraft battery is emergency power supply。When main aircraft power source cisco unity malfunction, aircraft battery will become unique guarantee that aircraft security lands。

Aircraft battery is so important for aircraft, but in actual use, the life-span of aircraft battery, often only it designed the 2/3 of standard, and the main cause causing this result is exactly the improper of charging method, specifically, it is simply that overcharging of accumulator。Overcharge of a battery harm is very big。It is known that, accumulator is charged inherently exothermic reaction, but when accumulator overcharges, can cause a large amount of hydrogen of accumulator, oxygen evolution, and oxygen is complex as water in battery terminal negative reproduction simultaneously, the caloric value of chemical reaction now is far longer than caloric value when charging normal。And battery excessive heating, the fall off rate of charging current can be caused to reduce, promote the reaction of electrolysis water to aggravate, even can reverse electric current when charging normal when situation is serious and should progressively decline this trend so that electric current goes up not down。And once charging current is counter rises, increases again new heating, and so forth, thermal runaway will be produced。Thermal runaway can cause that the battery lead plate of accumulator and housing constantly soften, and when thermal runaway phenomenon is excessively serious, accumulator physical arrangement can be caused to break。By rationally arranging the charging modes of accumulator, the phenomenon that overcharges can be stopped, reduce the infringement to accumulator, effectively extend the service life of accumulator, accumulator is kept effectively to use capacity, so, research design one aeronautical cell rational, efficient management system is very necessary。

Summary of the invention

A kind of aeronautical cell based on DSP of the present invention manages system, it is therefore an objective to provides a kind of for the battery management system based on sintered cadmium nickel aircraft battery, particularly eliminates the aeronautical cell management system of the memory effect of cadmium-nickel accumulator。

The object of the present invention is achieved like this: a kind of aeronautical cell based on DSP manages system; with dsp controller for control core; with rectifying and wave-filtering, full-bridge inverting, high frequency transformer, Buck-Boost circuit for main power circuit, and it is added with the auxiliary circuits such as power module, visualization model, security protection module。

A kind of aeronautical cell based on DSP manages system, and its operation principle is: during charging, and after DSP controls three-phase solid relay Guan Bi, main circuit works。After the rectified filtering of three-phase alternating-current supply, full-bridge inverting, high frequency transformation and secondary rectifying and wave-filtering, obtain the high-quality unidirectional current of high-quality, accumulator is charged。Wherein, DSP sends PWM ripple MOSFET pipe in the transfer pair full bridge inverter of overdrive circuit and is controlled, and then controls the size of inverter circuit output。During electric discharge, DSP sends the PWM ripple of certain dutycycle, and Buck-Boost circuit is controlled, and by discharge resistance, accumulator is carried out heavy-current discharge。Charging and discharging process has the collection of electric current and information of voltage, is sent to LCD after processing in dsp and displays。Three-phase alternating current is carried out monitor in real time by work process simultaneously, if be detected that have phase shortage or undervoltage condition to occur, it is possible to block system relay switch at any time。

Adopt Buck-Boost booster circuit, accumulator is carried out electric discharge after transformation process, so can increase discharge current, accelerate electric discharge process, and be prevented effectively from and make because battery tension is too low load not work so that the situation of battery discharge procedure accidental interruption occurs。

Work as power electronic devicesSDuring conducting, battery is to inductanceLCharging, charging current is essentiallyI ₁ It is worth constant, simultaneously electric capacityCOn voltage power to discharge resistance, due toCValue is very big, and output voltage keeps substantiallyU ₀ Constant。WhenSDuring shutoff, battery and inductanceLSimultaneously to electric capacityCCharging to load energy supply。Owing to circuit is under steady state operation, inductanceLThe energy accumulated in one cycle is equal with the energy value of releasing, obtains following formula:

Can obtain after conversion:

Wherein T is cut-offfing the cycle of S, t_onAnd t_offBeing the time of time that in unit period, S opens and shutoff respectively, E is battery power voltage。

Beneficial effects of the present invention: the present invention has the advantages such as modularity, real-time, favorable expandability, it is possible to be used widely in carrier-borne aviation safeguards system。

Accompanying drawing explanation

Fig. 1 is the system structure schematic diagram of the present invention；

Fig. 2 is the physical arrangement of whole system；

Fig. 3 is the hardware connection figure of the present invention。

Detailed description of the invention

Below in conjunction with accompanying drawing citing, the present invention is described in more detail:

In conjunction with the system structure schematic diagram that Fig. 1, Fig. 1 are the present invention；A kind of aeronautical cell based on DSP manages system; with dsp controller for control core; with rectifying and wave-filtering, full-bridge inverting, high frequency transformer, Buck-Boost circuit for main power circuit, and it is added with the auxiliary circuits such as power module, visualization model, security protection module。

A kind of aeronautical cell based on DSP manages system, and its operation principle is: during charging, and after DSP controls three-phase solid relay Guan Bi, main circuit works。After the rectified filtering of three-phase alternating-current supply, full-bridge inverting, high frequency transformation and secondary rectifying and wave-filtering, obtain the high-quality unidirectional current of high-quality, accumulator is charged。Wherein, DSP sends PWM ripple MOSFET pipe in the transfer pair full bridge inverter of overdrive circuit and is controlled, and then controls the size of inverter circuit output。During electric discharge, DSP sends the PWM ripple of certain dutycycle, and Buck-Boost circuit is controlled, and by discharge resistance, accumulator is carried out heavy-current discharge。Charging and discharging process has the collection of electric current and information of voltage, is sent to LCD after processing in dsp and displays。Three-phase alternating current is carried out monitor in real time by work process simultaneously, if be detected that have phase shortage or undervoltage condition to occur, it is possible to block system relay switch at any time。

Adopt Buck-Boost booster circuit, work as power electronic devicesSDuring conducting, battery is to inductanceLCharging, charging current is essentiallyI ₁ It is worth constant, simultaneously electric capacityCOn voltage power to discharge resistance, due toCValue is very big, and output voltage keeps substantiallyU ₀ Constant, whenSDuring shutoff, battery and inductanceLSimultaneously to electric capacityCCharge and to load energy supply, owing to circuit is under steady state operation, inductanceLThe energy accumulated in one cycle is equal with the energy value of releasing, obtains following formula:

Can obtain after conversion:

Wherein T is cut-offfing the cycle of S, t_onAnd t_offBeing the time of time that in unit period, S opens and shutoff respectively, E is battery power voltage。

It is the physical arrangement of whole system in conjunction with Fig. 2, Fig. 2；The aeronautical cell management system designed herein, except primary function circuit, also includes the auxiliary circuit of many, such as radiating circuit, lack detection circuit, circuit for alarming etc.。During normal operation, manual closing answered by air switch, and the three-phase alternating-current supply of 380V is connected with three-phase solid relay after flowing through insurance module。If DSP sends control signal, make three line solid-state relay Guan Bis, then 380V three-phase alternating current will flow through rectifier bridge and produce unidirectional current。DSP passes through Control electromagnetic switch, and electromagnetic switch controls the connection of system and battery, and in charge or discharge process, electromagnetic switch will close, and otherwise system does not connect battery, and charging and discharging is not just known where to begin。

In conjunction with the hardware connection figure that Fig. 3, Fig. 3 are the present invention。In the present invention, the chip used is varied, these chips and DSP all need suitable power supply, for ensureing the normal operation of circuit, after three-phase alternating current flows through air switch, the design adds an alternating current-direct current transformator, it is the unidirectional current of 220V by the AC conversion of 380V, then, respectively the power supply of 24V, 12V, 5V and two 15V is powered, finally ensures the normal operation of LCD, fan, DSP panel, discharge electrode。

Claims (3)

1. the aeronautical cell based on DSP manages system; it is characterized in that: with DSP for control core; with rectifying and wave-filtering, full-bridge inverting, high frequency transformation, Buck-Boost circuit for main power circuit, and device has power module, visualization model, security protection module。

2. a kind of aeronautical cell based on DSP according to claim 1 manages system, it is characterized in that: its operation principle is: during charging, DSP controls three-phase solid relay Guan Bi, main circuit works, the rectified filtering of three-phase alternating-current supply, full-bridge inverting, after high frequency transformation and secondary rectifying and wave-filtering, obtain unidirectional current, accumulator is charged, DSP sends PWM ripple MOSFET pipe in the transfer pair full bridge inverter of overdrive circuit and is controlled, during electric discharge, DSP sends the PWM ripple of certain dutycycle, Buck-Boost circuit is controlled, accumulator is carried out heavy-current discharge by discharge resistance, electric current in charging and discharging process and the collection of information of voltage process in dsp and are sent to LCD afterwards and display。

3. a kind of aeronautical cell based on DSP according to claim 1 manages system, it is characterised in that: adopt Buck-Boost booster circuit, work as power electronic devicesSDuring conducting, battery is to inductanceLCharging, charging current is essentiallyI ₁ It is worth constant, simultaneously electric capacityCOn voltage power to discharge resistance, due toCValue is very big, and output voltage keeps substantiallyU ₀ Constant, whenSDuring shutoff, battery and inductanceLSimultaneously to electric capacityCCharge and to load energy supply, owing to circuit is under steady state operation, inductanceLThe energy accumulated in one cycle is equal with the energy value of releasing, obtains following formula:

Can obtain after conversion:

Wherein T is cut-offfing the cycle of S, t_onAnd t_offBeing the time of time that in unit period, S opens and shutoff respectively, E is battery power voltage。