CN203883511U - DC power supply based lithium iron phosphate battery auxiliary management device - Google Patents

DC power supply based lithium iron phosphate battery auxiliary management device Download PDF

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Publication number
CN203883511U
CN203883511U CN201420186881.6U CN201420186881U CN203883511U CN 203883511 U CN203883511 U CN 203883511U CN 201420186881 U CN201420186881 U CN 201420186881U CN 203883511 U CN203883511 U CN 203883511U
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China
Prior art keywords
iron phosphate
lithium iron
auxiliary management
direct current
storage battery
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CN201420186881.6U
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Chinese (zh)
Inventor
王洪
尹中恒
周毅
林雄武
金林
谢永刚
杨思安
刘平
周贤培
袁永明
赵立成
刘庆华
王和
任启
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SHENZHEN TIEON ENERGY TECHNOLOGY Co Ltd
ZHANGJIAKOU POWER SUPPLY Co OF JIBEI ELECTRIC POWER CO Ltd
State Grid Corp of China SGCC
Original Assignee
SHENZHEN TIEON ENERGY TECHNOLOGY Co Ltd
ZHANGJIAKOU POWER SUPPLY Co OF JIBEI ELECTRIC POWER CO Ltd
State Grid Corp of China SGCC
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Application filed by SHENZHEN TIEON ENERGY TECHNOLOGY Co Ltd, ZHANGJIAKOU POWER SUPPLY Co OF JIBEI ELECTRIC POWER CO Ltd, State Grid Corp of China SGCC filed Critical SHENZHEN TIEON ENERGY TECHNOLOGY Co Ltd
Priority to CN201420186881.6U priority Critical patent/CN203883511U/en
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Abstract

The utility model relates to DC power supply based lithium iron phosphate battery auxiliary management device, which comprises a diode, a DC contactor, a DC current acquisition unit, a microprocessor and a battery, wherein one ends of the diode and the DC contactor, which are connected in parallel, are connected to the DC current acquisition unit, the other ends of the diode and the DC contactor, which are connected in parallel, are connected to an output terminal of the lithium iron phosphate battery auxiliary management device, the other end of the DC current acquisition unit is connected to an output terminal of the lithium iron phosphate battery auxiliary management device, the input end of the microprocessor is connected to the output end of the DC current acquisition unit, the input end of the DC current acquisition unit is connected to the battery and the DC contactor, the output end of the microprocessor is connected to the input end of the DC current acquisition unit, and the microprocessor is connected to a DC system general monitoring device and communicated with the DC system general monitoring device in a bidirectional mode. The service life of a lithium iron phosphate battery is prolonged and the performance of the lithium iron phosphate battery is improved through the auxiliary management device, thereby improving the reliability of DC power supply.

Description

A kind of lithium iron phosphate storage battery based on DC power supply is assisted management devices
Technical field
The utility model belongs to DC power supply field, relates in particular to the auxiliary management devices of a kind of lithium iron phosphate storage battery based on DC power supply.
Background technology
DC power supply back-up source energy storage majority in electric power system is to adopt lead acid accumulator, lead acid accumulator has that cost is low, high conformity, the purchasing of raw materials easily, the feature of technology maturation.But the main material that lead acid accumulator adopts--lead, is but to belong to heavy metal, lead acid accumulator producing, use, all can be attended by scrapping process the appearance of heavy metal, acid pollution, harm people and animal healthy.
Along with the development of new technology, green non-pollution, longer service life, the ferric phosphate lithium cell that energy density is higher are there is.The application of ferric phosphate lithium cell on DC power supply is at present mainly test, trial run, not application on a large scale.In to the investigation of LiFePO4, recognizing, there is another one greatest differences in ferric phosphate lithium cell and traditional storage battery---and self discharge of lithium iron phosphate battery rate is low, and battery will affect the useful life of storage battery for a long time under floating charge state.Lead acid accumulator is because its chemical property is active, and the storage battery of full capacity was placed after three months, and its battery capacity is lower than 80% capacity, so in traditional DC power system, be provided with the floating charge stage.At this stage charger taking the floating current of 0.01C as charge in batteries, to ensure that storage battery is all the time in full capacity state.
Ferric phosphate lithium cell is less in the application of electric power system DC power system at present, not for the special ferric phosphate lithium cell charger of the feature development of ferric phosphate lithium cell, but the traditional charger using.This device carries out equal floating charge according to the characteristic of lead acid accumulator to ferric phosphate lithium cell.This has just caused, and charging device also for ferric phosphate lithium cell carries out floating charge, under this state, will be separated out crystalline lithium in battery cathode under normal circumstances.The generation of crystalline lithium has reduced the quantity of conductive lithium ion in storage battery, causes the capacity loss of storage battery, and then affects serviceability and the life-span of storage battery.
Utility model content
The utility model provides a kind of lithium iron phosphate storage battery based on DC power supply to assist management devices, is intended to solve lithium iron phosphate storage battery floating charge and causes battery capacity to reduce, affect the problem in its serviceability and life-span.
The utility model is to realize like this, a kind of lithium iron phosphate storage battery based on DC power supply is assisted management devices, comprise diode D, D.C. contactor LK, direct current collecting unit LE, microprocessor CPU and battery, described diode D is connected described direct current collecting unit LE with one end after described D.C. contactor parallel connection, described diode D is connected the auxiliary management devices lead-out terminal of described lithium iron phosphate storage battery with the other end after described D.C. contactor parallel connection, the described direct current collecting unit LE other end connects the auxiliary management devices lead-out terminal of described lithium iron phosphate storage battery, described microprocessor CPU input connects described direct current collecting unit LE output, described direct current collecting unit LE input connects respectively described battery and D.C. contactor LK, described microprocessor CPU output connects described direct current collecting unit LE input, described microprocessor CPU connects direct current system and always monitors two-way communication.
Further technical scheme of the present utility model is: the auxiliary management devices of described lithium iron phosphate storage battery also comprises plastic casing, and described diode D, D.C. contactor LK, direct current collecting unit LE and microprocessor CPU are located in described plastic casing.
Further technical scheme of the present utility model is: the total monitoring communications of described microprocessor CPU and described direct current system adopts RS485 communication modes.
Further technical scheme of the present utility model is: the parameter of described diode D is 300A/800V.
Further technical scheme of the present utility model is: the parameter of described D.C. contactor LK is 100A/250V.
Further technical scheme of the present utility model is: what described direct current collecting unit LE adopted is shunt or Hall element, and parameter is 200A.
Further technical scheme of the present utility model is: what described microprocessor CPU adopted is STM32F103RB6 chip.
The beneficial effects of the utility model are: by the modularized design of auxiliary management devices, make design, production, the maintenance of ferric phosphate lithium cell DC power supply become safer, reliable, simple.Improve useful life, the performance of ferric phosphate lithium cell, and then improved the reliability of DC power supply.The ferric phosphate lithium cell of green non-pollution is as the substitute products of traditional lead acid accumulator, this device will promote the application of ferric phosphate lithium cell in DC power, be significant for transformer station's environmental protection design, this device has great promotional value.
Brief description of the drawings
Fig. 1 is the structured flowchart of the auxiliary management devices of the lithium iron phosphate storage battery based on DC power supply that provides of the utility model embodiment;
Fig. 2 is the schematic diagram of the auxiliary management devices of the lithium iron phosphate storage battery based on DC power supply that provides of the utility model embodiment;
Fig. 3 is that the utility model embodiment provides.
Embodiment
Reference numeral:
Fig. 1-3 show the auxiliary management devices of the lithium iron phosphate storage battery based on DC power supply that the utility model provides, comprise diode D, D.C. contactor LK, direct current collecting unit LE, microprocessor CPU and battery, described diode D is connected described direct current collecting unit LE with one end after described D.C. contactor parallel connection, described diode D is connected the auxiliary management devices lead-out terminal of described lithium iron phosphate storage battery with the other end after described D.C. contactor parallel connection, the described direct current collecting unit LE other end connects the auxiliary management devices lead-out terminal of described lithium iron phosphate storage battery, described microprocessor CPU input connects described direct current collecting unit LE output, described direct current collecting unit LE input connects respectively described battery and D.C. contactor LK, described microprocessor CPU output connects described direct current collecting unit LE input, described microprocessor CPU connects direct current system and always monitors two-way communication.By the modularized design of auxiliary management devices, make design, production, the maintenance of ferric phosphate lithium cell DC power supply become safer, reliable, simple.Improve useful life, the performance of ferric phosphate lithium cell, and then improved the reliability of DC power supply.The ferric phosphate lithium cell of green non-pollution is as the substitute products of traditional lead acid accumulator, this device will promote the application of ferric phosphate lithium cell in DC power, be significant for transformer station's environmental protection design, this device has great promotional value.
The auxiliary management devices of described lithium iron phosphate storage battery also comprises plastic casing, and described diode D, D.C. contactor LK, direct current collecting unit LE and microprocessor CPU are located in described plastic casing.
The total monitoring communications of described microprocessor CPU and described direct current system adopts RS485 communication modes.
The parameter of described diode D is 300A/800V.
The parameter of described D.C. contactor LK is 100A/250V.
What described direct current collecting unit LE adopted is shunt or Hall element, and parameter is 200A.
What described microprocessor CPU adopted is STM32F103RB6 chip.
Carry out timing by auxiliary management devices TD Real-time Collection accumulator cell charging and discharging electric current, battery tension and to the floating charge time, communicate by RS485 with the total monitoring of DC power supply; In system under normal circumstances, D.C. contactor LK is in disjunction state, and storage battery is connected with DC bus by diode D, because the one-way conduction effect of diode, charger floating current cannot charge to storage battery; As DC power supply exchanges input dead electricity, storage battery for DC bus provides electric current, ensures direct current system uninterrupted power supply by diode.Recover Alternating Current Power Supply when system, microprocessor CPU control D.C. contactor LK closes a floodgate, and is that ferric phosphate lithium cell is according to all chargings of program by charger.Reach after setting-up time, microprocessor CPU control D.C. contactor LK separating brake, stops charge in batteries; System power supply normally exceedes setting-up time or auxiliary management devices TD monitors ferric phosphate lithium cell terminal voltage lower than set point, the microprocessor CPU control D.C. contactor LK charger that closes a floodgate and communicate by letter is that ferric phosphate lithium cell is according to all chargings of blas by charger.Complete after ferric phosphate lithium cell charging, D.C. contactor LK separating brake, recovers normal condition.
Auxiliary management devices TD has solved ferric phosphate lithium cell and the conventional high-frequency switching power supply module matching problem that charges, and has avoided the floating current of ferric phosphate lithium cell in DC power system, can effectively extend the useful life of ferric phosphate lithium cell in system; When normal operation, auxiliary management devices, by diode, has completely cut off charger output voltage, and it is real batteries terminal voltage that servicing unit is surveyed batteries terminal voltage.This essence that is different from traditional direct current system detection batteries terminal voltage is DC bus-bar voltage, and voltage which is surveyed makes system can more accurately judge the performance of ferric phosphate lithium cell, is more conducive to ferric phosphate lithium cell to carry out management of charging and discharging; In auxiliary management devices, integrated accumulator cell charging and discharging current detecting, accumulator voltage detect measuring ability, and form a module.Auxiliary data that management devices detects are uploaded to total monitoring by RS485, have reduced in traditional DC power supply and have crossed battery current detecting unit, make system more simple; Adopt modularized design, simple in structure, design flexibility is strong, safeguard simple.In original system, seal in a supplementary module, can use ferric phosphate lithium cell to substitute lead acid accumulator and use.This scheme is convenient to Lead-acid Battery DC System and is transform ferric phosphate lithium cell direct current system as, is significant to promoting the alternative lead acid accumulator application of ferric phosphate lithium cell.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.

Claims (7)

1. the auxiliary management devices of the lithium iron phosphate storage battery based on DC power supply, it is characterized in that: comprise diode D, D.C. contactor LK, direct current collecting unit LE, microprocessor CPU and battery, described diode D is connected described direct current collecting unit LE with one end after described D.C. contactor parallel connection, described diode D is connected the auxiliary management devices lead-out terminal of described lithium iron phosphate storage battery with the other end after described D.C. contactor parallel connection, the described direct current collecting unit LE other end connects the auxiliary management devices lead-out terminal of described lithium iron phosphate storage battery, described microprocessor CPU input connects described direct current collecting unit LE output, described direct current collecting unit LE input connects respectively described battery and D.C. contactor LK, described microprocessor CPU output connects described direct current collecting unit LE input, described microprocessor CPU connects direct current system and always monitors two-way communication.
2. the auxiliary management devices of lithium iron phosphate storage battery according to claim 1, it is characterized in that: the auxiliary management devices of described lithium iron phosphate storage battery also comprises plastic casing, and described diode D, D.C. contactor LK, direct current collecting unit LE and microprocessor CPU are located in described plastic casing.
3. the auxiliary management devices of lithium iron phosphate storage battery according to claim 2, is characterized in that: the total monitoring communications of described microprocessor CPU and described direct current system adopts RS485 communication modes.
4. according to the auxiliary management devices of the lithium iron phosphate storage battery described in claim 1-3 any one, it is characterized in that: the parameter of described diode D is 300A/800V.
5. the auxiliary management devices of lithium iron phosphate storage battery according to claim 4, is characterized in that: the parameter of described D.C. contactor LK is 100A/250V.
6. the auxiliary management devices of lithium iron phosphate storage battery according to claim 5, is characterized in that: what described direct current collecting unit LE adopted is shunt or Hall element, and parameter is 200A.
7. the auxiliary management devices of lithium iron phosphate storage battery according to claim 5, is characterized in that: what described microprocessor CPU adopted is STM32F103RB6 chip.
CN201420186881.6U 2014-04-16 2014-04-16 DC power supply based lithium iron phosphate battery auxiliary management device Active CN203883511U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420186881.6U CN203883511U (en) 2014-04-16 2014-04-16 DC power supply based lithium iron phosphate battery auxiliary management device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420186881.6U CN203883511U (en) 2014-04-16 2014-04-16 DC power supply based lithium iron phosphate battery auxiliary management device

Publications (1)

Publication Number Publication Date
CN203883511U true CN203883511U (en) 2014-10-15

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Family Applications (1)

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Country Status (1)

Country Link
CN (1) CN203883511U (en)

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