CN106169795A - A kind of energy-storage lithium battery group and expansion method thereof - Google Patents

A kind of energy-storage lithium battery group and expansion method thereof Download PDF

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Publication number
CN106169795A
CN106169795A CN201610818150.2A CN201610818150A CN106169795A CN 106169795 A CN106169795 A CN 106169795A CN 201610818150 A CN201610818150 A CN 201610818150A CN 106169795 A CN106169795 A CN 106169795A
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China
Prior art keywords
battery
lithium battery
switch
voltage
magnitude
Prior art date
Application number
CN201610818150.2A
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Chinese (zh)
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CN106169795B (en
Inventor
司修利
王珺
林栋�
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沃太能源南通有限公司
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Priority to CN201610818150.2A priority Critical patent/CN106169795B/en
Publication of CN106169795A publication Critical patent/CN106169795A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014Circuits for equalisation of charge between batteries
    • H02J7/0019Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0026Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially using safety or protection circuits, e.g. overcharge/discharge disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304Overcurrent protection

Abstract

The invention discloses a kind of energy-storage lithium battery group, including casing, the multiple batteries being installed in series in casing, battery management module, current limliting module, charge switch, discharge switch, air switch, startup switch, communication plug receptacle and dynamic connector, described charge switch and discharge switch realize the control to battery charging and discharging;Described startup switch, communication plug receptacle connects battery management module, and described dynamic connector connects battery plus-negative plate, and described current limliting module realizes the harmony of each lithium battery group electric current;Described air switch carries out secondary overcurrent protection to lithium battery group.The invention provides a kind of energy-storage lithium battery group; it is possible not only to independent use; can be with parallel extended between multiple set of cells; automatically distribute main frame when parallel connection and communicate alternately with top controller; and the voltage concordance of multiple set of cells is realized by the break-make controlling charge and discharge switch; prevent the appearance of loop current, increase overcurrent protective device in addition, prevent stream from causing battery damage.

Description

A kind of energy-storage lithium battery group and expansion method thereof
Technical field
The present invention relates to lithium battery group, particularly relate to a kind of energy-storage lithium battery group and expansion method thereof.
Background technology
In recent years, lithium ion battery technology is increasingly mature, has high cycle life, high-energy-density, high security, green ring The advantages such as guarantor.Li-ion batteries piles is got more and more in the application of communication base station energy storage, family's energy storage, industry and commerce energy storage.So And different site of deployment needs the energy stored the most different, some lithium battery groups only considered current use when using and installing Electricity demand, if need for electricity increases in the future, needs to store more energy, can only lithium battery group be replaced, and cannot Realize dilatation.
Because needing and top controller interactive communication when Li-ion batteries piles uses, if lithium battery group is carried out also Connection, does not has master slave relation between several Battery packs of that parallel connection, then cannot realize the communication interaction with top controller, this loong shunt Set of cells due to state-of-charge may be inconsistent, cause voltage inconsistent, time in parallel, circulation will be produced, when circulation is serious Set of cells charge or discharge overcurrent protection can be directly resulted in, thus damage set of cells.
Also having the expansion method of some set of cells in prior art, having a kind of way is just to close charging after set of cells powers on And discharge switch, if battery voltage is inconsistent, just have the problem of circulation, be likely to result in set of cells charge or discharge protection; Also having another kind of way is not close charging and discharging switch after set of cells powers on, by judging adjacent set of cells pressure reduction, Limiting loop current by current-limiting resistance, the method number of comparisons is many, and efficiency is low, it is impossible to thoroughly solve loop current problem.
Summary of the invention
For overcoming the defect of prior art, the invention provides a kind of energy-storage lithium battery group, be possible not only to be independently operated, also Can automatically distribute main frame when parallel connection communicate alternately with top controller with parallel extended between multiple set of cells, and logical The break-make crossing control charge and discharge switch realizes the voltage concordance of multiple set of cells, prevents the appearance of loop current, increases in addition Overcurrent protective device, prevented stream from causing battery damage.
Present invention is disclosed a kind of energy-storage lithium battery group, including casing, the multiple batteries being installed in series in casing, battery Management module, current limliting module, charge switch, discharge switch and air switch, wherein:
It is provided with startup switch before described casing, is backed with two communication plug receptacles, two dynamic connectors;
Described charge switch and discharge switch are connected on the negative pole output lead of battery, are connected with battery management module simultaneously, by Battery management module realizes the control to battery charging and discharging;
Described startup switch connects described battery management module, is used for starting battery management module;
Described communication plug receptacle connects battery management module, realizes being in communication with each other between multiple lithium battery group by order wire;
Described dynamic connector connects battery plus-negative plate, realizes the parallel connection between multiple lithium battery group by power line;
Described current limliting block coupled in series is on the output lead of battery cathode, to limit the output electric current of lithium battery group, it is achieved each lithium The harmony of battery pack current;
Described air switch is connected on the output lead of anode, and lithium battery group is carried out secondary overcurrent protection, at current limliting mould Block disconnected protecting battery after losing efficacy.
Prestore the numbering of set of cells in described battery management module, and numbered uniquely, it is achieved the identity of set of cells Certification.
The expansion method of a kind of energy-storage lithium battery group, it is characterised in that concretely comprise the following steps:
Connect
The EMS order wire of the communication plug receptacle between multiple lithium battery groups and outside is sequentially connected with, Realize carrying out data interaction between lithium battery group and with outside EMS;By the power between multiple lithium battery groups Adapter power line is sequentially connected with, and then connects civil power by inverter;
Slave distributes
Opening the startup switch of all lithium battery groups in 30 seconds, the numbering of self is sent by each battery management module, Receive numbering that other battery management module bring simultaneously and carry out being compared to each other comparing, determining the lithium electricity that numbering is maximum Pond group is as main frame, and remaining lithium battery group is from machine, and main frame is attached communicating with outside EMS;
Regulation voltage level is consistent
Main frame sends charging instruction to outside EMS, and outside EMS controls inverter to lithium battery Group is charged, and the battery management module of each lithium battery group measures the magnitude of voltage of set of cells in real time simultaneously, and passes through order wire Being sent to main frame, each magnitude of voltage collected is compared and judges size by main frame, sends close command minimum to magnitude of voltage Lithium battery group, close charge switch and discharge switch by the battery management module of this lithium battery group, then by next to the lowest Magnitude of voltage compares with minimum magnitude of voltage, if pressure reduction is more than regulation pressure difference, inverter is electric to the lithium that magnitude of voltage is minimum Pond group is charged, and along with the rising of magnitude of voltage, the pressure difference between itself and next to the lowest lithium battery group is gradually reduced to being less than Fixing pressure difference;
Main frame transmission close command, to magnitude of voltage next to the lowest lithium battery group, is closed its charge switch and discharge switch, then will 3rd low magnitude of voltage compares with next to the lowest magnitude of voltage, if pressure reduction is more than regulation pressure difference, inverter is to magnitude of voltage Low and next to the lowest lithium battery group is charged, until the pressure difference between the second low lithium battery group is contracted to less than fixing pressure Difference, then repeat the above steps, until the charge switch of all lithium battery groups and discharge switch all close, it is achieved each lithium electricity Pond group voltage is consistent;
Discharge and recharge
After each lithium battery group magnitude of voltage is consistent, discharge and recharge can be normally carried out and use;
Overcurrent protection
During discharge and recharge, if charging and discharging currents limits the restriction electric current in module less than electric current, then electric current restriction module does not works, if More than limiting electric current, then starting current limits module, protects battery as charging and discharging currents limiting electric current;
During discharge and recharge, if electric current limits module and damages, air switch carries out second class protection, and when crossing stream, air switch disconnects automatically.
Compared with prior art, a kind of energy-storage lithium battery group of the present invention, there is following usefulness:
Can carry out parallel extended between lithium battery group, solve cannot be parallel extended in prior art problem, add lithium The actual application time of battery, remove the trouble that later stage capacity is changed not from, reduce replacement cost simultaneously, save the time;
Use the basis that lithium battery unique encodings distributes as slave, it is achieved the automatic distribution of slave, it is achieved with outside The interactive communication of EMS;
Use main frame to collect each module voltage, each magnitude of voltage arranged by size, the set of cells that first sealing voltage is minimum, Then carry out pressure reduction with the magnitude of voltage of big one-level to compare, by judging whether pressure difference carries out the Guan Bi of further battery group, directly Consistent to voltage, the method number of comparisons is few, efficiently, can thoroughly eliminate the problem that there is loop current between set of cells.
Accompanying drawing explanation
Fig. 1 is the circuit module figure of disclosed energy-storage lithium battery group.
Detailed description of the invention
Below in conjunction with the accompanying drawing of the present invention, the technical scheme of the embodiment of the present invention is carried out clear, complete description.
As it is shown in figure 1, disclosed a kind of energy-storage lithium battery group, including casing, it is installed in series in casing Multiple batteries, battery management module, current limliting module, charge switch, discharge switch and air switch, wherein:
Described box back surface is provided with startup switch, two communication plug receptacles, two dynamic connectors;
Described charge switch and discharge switch are connected on the negative pole output lead of battery, are connected with battery management module simultaneously, logical Cross battery management module and control to open Guan Bi thus the realization control to battery charging and discharging;
Described startup switch connects described battery management module, is used for starting battery management module;
Described communication plug receptacle connects battery management module, realizes being in communication with each other between multiple lithium battery group by order wire;
Described dynamic connector connects battery plus-negative plate, realizes the parallel connection between multiple lithium battery group by power line;
Described current limliting block coupled in series is on the output lead of battery cathode, to limit the output electric current of lithium battery group, it is achieved each lithium The harmony of battery pack current;
Described air switch is connected on the output lead of anode, and lithium battery group is carried out secondary overcurrent protection, at current limliting mould Block disconnected protecting battery after losing efficacy.
Described battery management module, for realizing the collection of battery data, prestores the numbering of set of cells, and compiles inside it It number it is unique, it is achieved the authentication of set of cells.
The expansion method of a kind of energy-storage lithium battery group, it is characterised in that concretely comprise the following steps:
Connect
The EMS order wire of the communication plug receptacle between multiple lithium battery groups and outside is sequentially connected with, Realize carrying out data interaction between lithium battery group and with outside EMS;By the power between multiple lithium battery groups Adapter power line is sequentially connected with, and then connects civil power by inverter;
The concrete form connected is that by order wire, one communication plug receptacle of first lithium battery group is connected to second lithium One communication plug receptacle of set of cells, another communication plug receptacle of second lithium battery group connects the 3rd lithium by order wire One communication plug receptacle of set of cells, repeats this connected mode until all lithium battery groups are all connected with, by last lithium battery Another communication plug receptacle of group is connected to the EMS of outside by order wire, and the most all of order wire is the most quite In a communication bus, the EMS of each lithium battery group and outside is all connected with this communication bus, it is achieved mutually Data interaction;
The connected mode of dynamic connector is consistent with communication plug receptacle, is sequentially connected with and finally connects inverter;
Slave distributes
Opening the startup switch of all lithium battery groups in 30 seconds, the numbering of self is sent by each battery management module, Receive numbering that other battery management module bring simultaneously and carry out being compared to each other comparing, determining the lithium electricity that numbering is maximum Pond group is as main frame, and remaining lithium battery group is from machine, and main frame is attached communicating with outside EMS;
Regulation voltage level is consistent
Main frame sends charging instruction to outside EMS, and outside EMS controls inverter to lithium battery Group is charged, and the battery management module of each lithium battery group measures the magnitude of voltage of set of cells in real time simultaneously, and passes through order wire Being sent to main frame, each magnitude of voltage collected is compared and judges size by main frame, sends close command minimum to magnitude of voltage Lithium battery group, close charge switch and discharge switch by the battery management module of this lithium battery group, then by next to the lowest Magnitude of voltage compares with minimum magnitude of voltage, if pressure reduction is more than regulation pressure difference, inverter is electric to the lithium that magnitude of voltage is minimum Pond group is charged, and along with the rising of magnitude of voltage, the pressure difference between itself and next to the lowest lithium battery group is gradually reduced to being less than Fixing pressure difference;
Main frame transmission close command, to magnitude of voltage next to the lowest lithium battery group, is closed its charge switch and discharge switch, then will 3rd low magnitude of voltage compares with next to the lowest magnitude of voltage, if pressure reduction is more than regulation pressure difference, inverter is to magnitude of voltage Low and next to the lowest lithium battery group is charged, until the pressure difference between the second low lithium battery group is contracted to less than fixing pressure Difference, then repeat the above steps, until the charge switch of all lithium battery groups and discharge switch all close, it is achieved each lithium electricity Pond group voltage is consistent;
Discharge and recharge
After each lithium battery group magnitude of voltage is consistent, discharge and recharge can be normally carried out and use;
Overcurrent protection
During discharge and recharge, if charging and discharging currents limits the restriction electric current in module less than electric current, then electric current restriction module does not works, if More than limiting electric current, then starting current limits module, protects battery as charging and discharging currents limiting electric current;
During discharge and recharge, if electric current limits module and damages, air switch carries out second class protection, and when crossing stream, air switch disconnects automatically.
The technology contents of the present invention and technical characteristic have revealed that as above, but those of ordinary skill in the art still may base Make all replacements without departing substantially from spirit of the present invention and modification in the announcement of the present invention, therefore, scope should not limit In the content disclosed in embodiment, and the various replacement without departing substantially from the present invention and modification should be included, and be present patent application right Require to be contained.

Claims (3)

1. an energy-storage lithium battery group, it is characterised in that: include casing, the multiple batteries being installed in series in casing, cell tube Reason module, current limliting module, charge switch, discharge switch and air switch, wherein:
It is provided with startup switch before described casing, is backed with two communication plug receptacles, two dynamic connectors;
Described charge switch and discharge switch are connected on the negative pole output lead of battery, are connected with battery management module simultaneously, by Battery management module realizes the control to battery charging and discharging;
Described startup switch connects described battery management module, is used for starting battery management module;
Described communication plug receptacle connects battery management module, realizes being in communication with each other between multiple lithium battery group by order wire;
Described dynamic connector connects battery plus-negative plate, realizes the parallel connection between multiple lithium battery group by power line;
Described current limliting block coupled in series is on the output lead of battery cathode, to limit the output electric current of lithium battery group, it is achieved each lithium The harmony of battery pack current;
Described air switch is connected on the output lead of anode, and lithium battery group is carried out secondary overcurrent protection, at current limliting mould Block disconnected protecting battery after losing efficacy.
A kind of energy-storage lithium battery group the most according to claim 1, it is characterised in that: prestore in described battery management module The numbering of set of cells, and numbered uniquely.
3. the expansion method of energy-storage lithium battery group in a claim 1, it is characterised in that concretely comprise the following steps:
Connect
The EMS order wire of the communication plug receptacle between multiple lithium battery groups and outside is sequentially connected with, Realize carrying out data interaction between lithium battery group and with outside EMS;By the power between multiple lithium battery groups Adapter power line is sequentially connected with, and then connects civil power by inverter;
Slave distributes
Opening the startup switch of all lithium battery groups in 30 seconds, the numbering of self is sent by each battery management module, Receive numbering that other battery management module send over simultaneously and carry out being compared to each other comparing, determining the lithium that numbering is maximum Set of cells is as main frame, and remaining lithium battery group is from machine, and main frame communicates with outside EMS;
Regulation voltage level is consistent
Main frame sends charging instruction to outside EMS, and outside EMS controls inverter to lithium battery Group is charged, and the battery management module of each lithium battery group measures the magnitude of voltage of set of cells in real time simultaneously, and passes through order wire Being sent to main frame, each magnitude of voltage collected is compared and judges size by main frame, sends close command minimum to magnitude of voltage Lithium battery group, close charge switch and discharge switch by the battery management module of this lithium battery group, then by next to the lowest Magnitude of voltage compares with minimum magnitude of voltage, if pressure reduction is more than regulation pressure difference, inverter is electric to the lithium that magnitude of voltage is minimum Pond group is charged, and along with the rising of magnitude of voltage, the pressure difference between itself and next to the lowest lithium battery group is gradually reduced to being less than Fixing pressure difference;
Main frame transmission close command, to magnitude of voltage next to the lowest lithium battery group, is closed its charge switch and discharge switch, then will 3rd low magnitude of voltage compares with next to the lowest magnitude of voltage, if pressure reduction is more than regulation pressure difference, inverter is to magnitude of voltage Low and next to the lowest lithium battery group is charged, until the pressure difference between the second low lithium battery group is contracted to less than fixing pressure Difference, then repeat the above steps, until the charge switch of all lithium battery groups and discharge switch all close, now each lithium electricity Between the group of pond, magnitude of voltage is consistent;
Overcurrent protection
During discharge and recharge, if charging and discharging currents limits the restriction electric current in module less than electric current, then electric current restriction module does not works, if More than limiting electric current, then starting current limits module, protects battery as charging and discharging currents limiting electric current;
During discharge and recharge, if electric current limits module and damages, air switch carries out second class protection, and when crossing stream, air switch disconnects automatically.
CN201610818150.2A 2016-09-13 2016-09-13 A kind of energy-storage lithium battery group and its expansion method CN106169795B (en)

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PCT/CN2017/081542 WO2018049817A1 (en) 2016-09-13 2017-04-22 Energy-storage lithium battery pack, and capacity expansion method for same

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CN106711526A (en) * 2017-02-10 2017-05-24 萨瑞新能源技术(苏州)有限公司 Energy storage lithium battery pack and capacity expansion method thereof
WO2018049817A1 (en) * 2016-09-13 2018-03-22 沃太能源南通有限公司 Energy-storage lithium battery pack, and capacity expansion method for same
CN108512269A (en) * 2018-03-14 2018-09-07 深圳市爱克斯达电子有限公司 A kind of cell parallel balancing device and charge/discharge control method
CN108767927A (en) * 2018-06-27 2018-11-06 杭州极速电子有限公司 A kind of lithium battery management system
CN109742471A (en) * 2018-11-28 2019-05-10 北京海博思创科技有限公司 The processing system of retired battery
CN111384455A (en) * 2020-04-14 2020-07-07 杭州协能科技股份有限公司 BMS multi-machine parallel implementation system

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CN101969213B (en) * 2010-07-27 2013-02-27 天津力神电池股份有限公司 Communication and control device for pure electric automobile charger
CN102082307B (en) * 2010-12-31 2013-08-07 华为技术有限公司 Method and system for parallel use of lithium battery modules
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CN202474131U (en) * 2012-03-23 2012-10-03 合普新能源科技有限公司 Power battery system of battery-operated motorcycle capable of expanding capacity in parallel
CN103579701B (en) * 2013-11-12 2016-01-20 惠州市蓝微电子有限公司 The parallel extended circuit of energy-storage lithium battery and the parallel extended voltage control method of energy-storage lithium battery
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CN106169795B (en) * 2016-09-13 2018-08-17 沃太能源南通有限公司 A kind of energy-storage lithium battery group and its expansion method
CN106711526A (en) * 2017-02-10 2017-05-24 萨瑞新能源技术(苏州)有限公司 Energy storage lithium battery pack and capacity expansion method thereof

Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2018049817A1 (en) * 2016-09-13 2018-03-22 沃太能源南通有限公司 Energy-storage lithium battery pack, and capacity expansion method for same
CN106711526A (en) * 2017-02-10 2017-05-24 萨瑞新能源技术(苏州)有限公司 Energy storage lithium battery pack and capacity expansion method thereof
CN108512269A (en) * 2018-03-14 2018-09-07 深圳市爱克斯达电子有限公司 A kind of cell parallel balancing device and charge/discharge control method
CN108767927A (en) * 2018-06-27 2018-11-06 杭州极速电子有限公司 A kind of lithium battery management system
CN109742471A (en) * 2018-11-28 2019-05-10 北京海博思创科技有限公司 The processing system of retired battery
CN109742471B (en) * 2018-11-28 2020-12-15 北京海博思创科技股份有限公司 Processing system of retired battery
CN111384455A (en) * 2020-04-14 2020-07-07 杭州协能科技股份有限公司 BMS multi-machine parallel implementation system

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