CN109842170A - A kind of power supply system and its control method using retired battery - Google Patents
A kind of power supply system and its control method using retired battery Download PDFInfo
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- CN109842170A CN109842170A CN201711226145.3A CN201711226145A CN109842170A CN 109842170 A CN109842170 A CN 109842170A CN 201711226145 A CN201711226145 A CN 201711226145A CN 109842170 A CN109842170 A CN 109842170A
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- load
- battery
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- power supply
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000011897 real-time detection Methods 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 description 13
- 230000005611 electricity Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a kind of power supply system and its control method using retired battery, the power supply system includes power grid, rectifier, DC load, DC bus, system controller, several retired battery packs；The rectifier is separately connected power grid and DC bus；The output end of each retired battery pack is connected in parallel on DC bus；The DC load connects DC bus；The system controller is separately connected power grid, rectifier, two-way DC converter, DC bus, inverter, AC load and DC load.Compared with prior art, the present invention can accomplish the function of flowing between equipment, utmostly protect the safety and stablization of system and the performance and used life of battery.
Description
Technical field
The present invention relates to retired field of batteries, more particularly, to a kind of power supply system and its control using retired battery
Method.
Background technique
China's Vehicular dynamic battery is mostly lithium ion battery, although the biggish huge sum of money of the toxics such as not mercurous, cadmium, lead
Belong to element, if but waste and old lithium ion battery deal with improperly and still environment caused greatly to pollute.For example, waste and old lithium ion battery
Electrode material enters in environment, can chemically react with other substances, cause heavy metal pollution, alkali pollution and dust pollution；
Electrolyte enters in environment, and after chemical reaction may cause fluoride pollution and arsenic pollution.The recycling of current retired battery
Scheme has, and disassembling detection, dress packet uses again, or directly disassembles the rare metal for recycling inside battery again, prevents to ring
Caused by border the problem of heavy metal pollution.
From battery as from the perspective of energy storage, the charging and discharging currents of battery have absolutely the performance of battery and service life
Influence, therefore for retired battery, it is necessary to which the charging and discharging currents of the retired battery of strict control can extend the longevity of battery
Life, slows down the capacity attenuation of echelon battery.
By retrieval, China Patent Publication No. is that CN105977553A discloses a kind of retired battery echelon of electric car
Multiplexed network grade bidirectional energy-storage supervising platform, including several basic energy-storage units are respectively connected to and are connected to by power line
Power grid, basic energy-storage units include electric car old and useless battery, energy-storage units monitoring system and battery bidirectional power converter,
Wherein, electric car old and useless battery is connect by power line with battery bidirectional power converter, and electric car old and useless battery with
Battery bidirectional power converter connects energy-storage units monitoring system by connection respectively；Meanwhile in each basic energy-storage units
Energy-storage units monitoring system connect with network level energy-storage system monitor supervision platform by connection one by one respectively.The invention can be with
It powers to important load, extends retired battery, improve the utilization rate of power battery, reducing energy-storage battery makes
Use cost；Energy conservation and environmental protection controls load fluctuation, improves grid power quality.But there is defect in the invention:
1) it is mainly biased to the prediction to battery life, is predicted using peculiar equipment；
2) there is no master & slave control, can not accomplish the function of flowing between equipment；
3) do not refer to power module with warm connection function；
China Patent Publication No. be CN106532966A disclose it is a kind of charged the battery using renewable energy or
The energy-storage system of person's electric discharge comprising renewable source of energy generation module, power control module, DC bus, multiple charge and discharge controls
Module, straight ac converter module, ac bus and energy management module；Each charge and discharge in multiple charge and discharge control modules
Control module includes DC/DC converter unit and the electricity accumulating unit that connect with DC/DC converter unit.The present invention is by using list
A DC/DC converter unit and single electricity accumulating unit constitute an independent charge and discharge control module, then multiple charge and discharge in parallel
Control module simultaneously individually carries out charge and discharge control to each electricity accumulating unit by energy management module, can effectively improve system
Performance and battery that can be different with newness degree using specifications parameter simultaneously.
There are problems:
1) there are unstable factors for renewable energy, after the energy storage of energy-storage system depletes, cannot achieve the normal of system
Operating can only be used as alternative power source in short-term in practice, can not be promoted the use of a large area.
2) each module contains controller, and manufacturing cost is higher.
Summary of the invention
Retired battery is utilized it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of
Power supply system and its control method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of power supply system using retired battery, the power supply system includes power grid, rectifier, DC load, straight
Flow bus, system controller, several retired battery packs；
The rectifier is separately connected power grid and DC bus；The output end of each retired battery pack is connected in parallel on directly
It flows on bus；The DC load connects DC bus；The system controller is separately connected power grid, rectifier, two-way
DC converter, DC bus, inverter, AC load and DC load.
Preferably, the retired battery pack includes the converter of retired battery and identical quantity, each described
Converter one end is connected with corresponding retired battery, and the other end is connected in parallel on DC bus.
Preferably, the converter is two-way DC converter.
Preferably, which further includes AC load and inverter, and the AC load is connected to by inverter
On DC bus.
Preferably, the AC load is directly connected to power grid.
A kind of control method based on the power supply system using retired battery, the control method include with
Lower step:
(1) initial state value of system, the system of voltage, electric current, power, switch state including system equipment are obtained
Essential information；
(2) each variable in system software is initialized, the upper limit value of the voltage and current including each equipment,
Lower limit value and corresponding rated value；
(3) after bus is established, load current, computational load power, and the set of currents number that real-time detection is online are obtained；
(4) judge whether load current is greater than the sum of battery pack maximum output current, if so, going to (6)；If it is not, turning
To (5)；
(5) according to the online battery pack number of real-time detection, by equal flow algorithm, evenly distribute load current, system by
Battery pack goes to (7) as output object；
(6) the sum of battery pack maximum output current is insufficient for the demand of load current, judges electric current difference by rectifying
Device provides, and goes to (7)；
(7) whether the end voltage for detecting each group of battery is lower than the lower limit value of (2) setting, if so, (8) are gone to, if it is not,
Go to (4)；
(8) this group of battery is cut off, and updates battery pack quantity, goes to (9)；
(9) judge whether online battery pack quantity is greater than 1, if so, going to (4)；If it is not, going to (10)；
(10) system load electric current is all provided by rectifier, while going to (7).
Compared with prior art, the invention has the following advantages that
1, using equal Flow Technique, the two-way DC converter no matter added (battery pack) quantity is how many, can make same
Deng output, to utmostly protect the safety and stablization of system；
2, it can be directed to the real-time status of every group of battery in real time, determine the charging and discharging currents value of battery pack, utmostly protect
The performance and used life of battery.
Detailed description of the invention
Fig. 1 is power supply system structural schematic diagram of the invention；
Fig. 2 is the control method flow chart of power supply system of the invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described reality
Applying example is a part of the embodiments of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to guarantor of the present invention
The range of shield.
As shown in Figure 1, a kind of power supply system using retired battery, the power supply system include power grid, rectifier,
AC load, DC load, DC bus, system controller, inverter, several retired batteries and identical quantity it is two-way
DC converter.The rectifier connection power grid and DC bus；One two-way DC converter and one it is retired
One group of battery pack of battery composition；The output end of each group of the two-way DC converter is connected in parallel on DC bus, another
End connects the retired battery of the group；The AC load connects DC bus, the DC load connection by inverter
DC bus；The system controller connects power grid, rectifier, two-way DC converter, DC bus, inverter, exchange
Load and DC load.
As shown in Fig. 2, a kind of control method of the power supply system using retired battery, comprising the following steps:
(1) obtains the initial state value of system, the systems such as voltage, electric current, power, switch state including system equipment
Essential information；
(2) initializes each variable in system software, and voltage and current including each equipment etc. is joined substantially
Several upper limit value, lower limit value and corresponding rated values；
(3) obtains load current, computational load power, and the set of currents number that real-time detection is online after bus is established；
(4) judges whether load current is greater than the sum of battery pack maximum output current, if so, going to (6)；If it is not,
Go to (5)；
(5) is according to the online battery pack number of real-time detection, by equal flow algorithm, carries out evenly distributing load current, system
By battery pack as main output object, (7) are gone to；
(6) the sum of battery pack maximum output current is insufficient for the demand of load current, judges electric current difference by whole
It flows device to provide, goes to (7)；
(7) whether the end voltage that detects each group of battery is lower than the lower limit value of (2) setting, if so, (8) are gone to, if it is not,
Go to (4)；
(8) cuts off this group of battery, and updates battery pack quantity, goes to (9)；
(9) judges whether online battery pack quantity is greater than 1, if so, going to (4)；If it is not, going to (10)；
(10) system load electric current is all provided by rectifier, while going to (7).
This control method can be applied in charging pile or corresponding ac and dc systems.Cardinal principle is to obtain first
The quantity of each group battery, battery port voltage, monomer battery voltage and load total current, DC bus under current operating conditions
The parameter informations such as voltage, DC bus current；Then, in initialization system the parameter of each equipment rated value, upper limit value and
Lower limit value obtains DC bus current, and computational load power, rectifier input power, and the battery pack that real-time detection is online
Number, furthermore judge whether load current is more than the sum of battery pack maximum output current, and determine to be defeated by battery according to this judgement
Electric current meets load out, or when battery cannot provide enough electric currents, is supplied to load by rectifier current output and uses,
Load current is divided equally to battery output, exports electric current simultaneously in battery pack, detects battery terminal voltage, work as battery terminal voltage
When lower than setting value, this battery module is cut off, and counts online battery pack again, recalculates and distribute battery pack output
Electric current, to reach the sharing control to battery pack.The present invention can realize the sharing control of battery pack automatically, guarantee retired electricity
The stability and reliability of pond power supply system.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, appoints
What those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications
Or replacement, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention is answered
It is subject to the protection scope in claims.
Claims (6)
1. a kind of power supply system using retired battery, it is characterised in that: the power supply system includes power grid, rectifier, straight
Current load, DC bus, system controller, several retired battery packs；
The rectifier is separately connected power grid and DC bus；The output end of each retired battery pack is connected in parallel on DC bus
On；The DC load connects DC bus；The system controller is separately connected power grid, rectifier, bidirectional, dc and becomes
Parallel operation, DC bus, inverter, AC load and DC load.
2. power supply system according to claim 1, which is characterized in that each retired battery pack includes retired battery
With the converter of identical quantity, each described converter one end is connected with corresponding retired battery, and the other end is connected in parallel on direct current mother
On line.
3. power supply system according to claim 2, which is characterized in that the converter is two-way DC converter.
4. power supply system according to claim 1, which is characterized in that the system further includes AC load and inverter, institute
The AC load stated is connected on DC bus by inverter.
5. power supply system according to claim 4, which is characterized in that the AC load is directly connected to power grid.
6. a kind of control method based on the power supply system described in claim 1 using retired battery, which is characterized in that described
Control method the following steps are included:
(1) initial state value of system is obtained, the system of voltage, electric current, power, switch state including system equipment is believed substantially
Breath；
(2) each variable in system software is initialized, the upper limit value of the voltage and current including each equipment, lower limit value
With corresponding rated value；
(3) after bus is established, load current, computational load power, and the set of currents number that real-time detection is online are obtained；
(4) judge whether load current is greater than the sum of battery pack maximum output current, if so, going to (6)；If it is not, going to
(5)；
(5) it according to the online battery pack number of real-time detection, by equal flow algorithm, carries out evenly distributing load current, system is by battery
Group goes to (7) as output object；
(6) the sum of battery pack maximum output current is insufficient for the demand of load current, judges that electric current difference is mentioned by rectifier
For going to (7)；
(7) whether the end voltage for detecting each group of battery is lower than the lower limit value of (2) setting, if so, (8) are gone to, if it is not, going to
(4)；
(8) this group of battery is cut off, and updates battery pack quantity, goes to (9)；
(9) judge whether online battery pack quantity is greater than 1, if so, going to (4)；If it is not, going to (10)；
(10) system load electric current is all provided by rectifier, while going to (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711226145.3A CN109842170B (en) | 2017-11-29 | 2017-11-29 | Power supply system utilizing retired battery and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711226145.3A CN109842170B (en) | 2017-11-29 | 2017-11-29 | Power supply system utilizing retired battery and control method thereof |
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| CN109842170A true CN109842170A (en) | 2019-06-04 |
| CN109842170B CN109842170B (en) | 2024-10-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839453A (en) * | 2021-11-26 | 2021-12-24 | 深圳市永联科技股份有限公司 | Battery control circuit, device and equipment |
| CN114598008A (en) * | 2022-03-25 | 2022-06-07 | 清华大学 | Energy storage power supply device, energy storage power supply control method and device and single chip microcomputer |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839453A (en) * | 2021-11-26 | 2021-12-24 | 深圳市永联科技股份有限公司 | Battery control circuit, device and equipment |
| CN114598008A (en) * | 2022-03-25 | 2022-06-07 | 清华大学 | Energy storage power supply device, energy storage power supply control method and device and single chip microcomputer |
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| Publication number | Publication date |
|---|---|
| CN109842170B (en) | 2024-10-11 |
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