CN109755948A - Voltage balance circuit and its voltage balancing method for energy-storage system battery module - Google Patents
Voltage balance circuit and its voltage balancing method for energy-storage system battery module Download PDFInfo
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- CN109755948A CN109755948A CN201711087024.5A CN201711087024A CN109755948A CN 109755948 A CN109755948 A CN 109755948A CN 201711087024 A CN201711087024 A CN 201711087024A CN 109755948 A CN109755948 A CN 109755948A
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Abstract
The invention discloses a kind of voltage balance circuits and its voltage balancing method for energy-storage system battery module, battery cluster unit, electric voltage equalization unit and battery management module including at least two access power grids in parallel, main relay K1 is concatenated between each battery cluster unit and power grid, each battery cluster unit is connect by electric voltage equalization unit with positive and negative anodes bus, and the battery management module connect disconnection and closure for controlling relay power with main relay K1 and electric voltage equalization unit respectively;The battery management module connect the information of voltage for acquiring battery cluster unit with each battery cluster unit, in this way, the present invention can be realized in battery cluster in each battery module and different clusters between battery module quickly, it is efficiently balanced, it is high reliablity, at low cost, cell system voltage consistency is improved, system operation time and service life are extended.
Description
Technical field
The invention belongs to lithium-ion energy storage battery technical fields, and in particular to the voltage for energy-storage system battery module is equal
Weigh circuit and its voltage balancing method.
Background technique
Currently, lithium ion battery in energy storage field using more and more extensive, in large-scale power grid grade energy storage field, energy storage system
System is by the battery composition of enormous amount, and to be easily installed and safeguarding, battery system uses modularized design, first by several monomers
Battery strings compose in parallel battery module, then are composed in series battery cluster by several battery modules, if dry cell cluster forms battery pile, warp
Power grid is output to after crossing energy conversion device PCS.In the use process of battery system, due to each single battery self discharge not
Unanimously, battery module, battery cluster, battery pile management system at different levels, equal balance system at different levels and the circuit PCS can consume battery
It is inconsistent to further result in each battery cell voltage for electricity.
In existing energy-storage system, there is corresponding balancer between the single battery of battery module, battery module, but existing
Have technology be only capable of carrying out the single battery inside battery module it is relatively effective balanced, to battery module, battery cluster, battery pile it
Between electric voltage equalization effect it is poor, the poor reliability of balanced device is at high cost;Since portfolio effect is undesirable, need to battery mould
Block, battery cluster and battery pile carry out maintenance off-line, increase to maintain equipment and personnel, and the efficiency safeguarded is lower.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide the voltages for energy-storage system battery module
Equalizing circuit and its voltage balancing method.
A kind of voltage balance circuit for energy-storage system battery module provided by the invention comprising at least two is in parallel
Battery cluster unit, electric voltage equalization unit and the battery management module for accessing power grid, go here and there between each battery cluster unit and power grid
Main relay K1 is met, each battery cluster unit is connect by electric voltage equalization unit with positive and negative anodes bus, the battery management
Module connect disconnection and closure for controlling relay power with main relay K1 and electric voltage equalization unit respectively;The battery
Management module connect the information of voltage for acquiring battery cluster unit with each battery cluster unit.
Preferably, each battery cluster unit includes energy converter and at least one battery module, the battery mould
The cathode of block and one end of energy converter connect, and the anode of the battery module is connect with the other end of energy converter, institute
It states and is sequentially connected in series battery cluster total relay K2 and fuse FU1, the electricity between battery module and the other end of energy converter
Cluster total relay K2 in pond is connect with battery management module;The positive and negative anodes and electric voltage equalization unit of at least one battery module connect
It connects;The battery management module is connect at least one described battery module.
Preferably, the electric voltage equalization unit includes anode relay K3 in parallel, cathode parallel connection relay K4;The anode
One end of relay K3 in parallel and the anode of battery module connect, and the other end accesses positive parallel bus;The cathode parallel connection after
One end of electric appliance K4 and the cathode of battery module connect, and the other end accesses cathode parallel bus;The battery management module difference
It connect with main relay K1, the total relay K2 of battery cluster, anode relay K3 in parallel, cathode parallel connection relay K4 for controlling
The disconnection and closure of relay power processed.
Preferably, current-limiting resistance RC is also serially connected between battery module relay K3 in parallel with anode;The battery
Fuse FU2 is also serially connected between module relay K4 in parallel with cathode.
Preferably, the battery module includes at least one single battery being serially connected.
Preferably, when two or more are arranged in the battery module, each battery module is in sequential series in the same direction, phase
Connect in series relay K5 between adjacent two each battery modules, and the series relay K5 and battery management module connect
It connects.
Preferably, when two or more are arranged in the battery cluster unit, two neighboring each battery cluster list
Stringing cells cluster parallel connection relay K6, the battery cluster parallel connection relay K6 and battery management module connect between the battery module of member
It connects.
The present invention also provides a kind of voltage balancing method for energy-storage system battery module, this method is used as above-mentioned
The voltage balance circuit of energy-storage system battery module, this method are used for described in scheme are as follows: the battery management module acquisition to be every
The information of voltage of a battery cluster unit, and judge whether the information of voltage of each battery cluster unit is identical, if described
The information of voltage of each battery cluster unit is different, and the battery management module controls each battery cluster unit and power grid disconnects, so
The battery management module controls each battery cluster unit afterwards and electric voltage equalization unit is closed, balanced each battery cluster unit
Voltage.
Preferably, this method specifically: the battery management module acquires each battery module in each battery cluster unit
Information of voltage, and judge whether the information of voltage of each battery module identical, if each battery module
The information of voltage of information of voltage is different, the battery management module control main relay K1, the total relay K2 of battery cluster, series connection after
Electric appliance K5 is disconnected, and then the anode relay K3 in parallel in the battery management module control electric voltage equalization unit, cathode are in parallel
Relay K4 closure, the voltage of each battery module 4 of balanced each battery cluster unit.
Preferably, when two or more are arranged in the battery cluster unit, balanced each battery cluster unit
The voltage of each battery module, later, further includes: the battery management module control battery cluster parallel connection relay K6 closure,
The voltage of each battery module in the different battery cluster units that weigh.
Compared with prior art, the present invention provides a kind of voltage balance circuit for energy-storage system battery module and its
Voltage balancing method comprising battery cluster unit, electric voltage equalization unit and the battery management mould of at least two access power grids in parallel
Block, concatenates main relay K1 between each battery cluster unit and power grid, each battery cluster unit passes through electric voltage equalization list
Member is connect with positive and negative anodes bus, and the battery management module is connect with main relay K1 and electric voltage equalization unit for controlling respectively
The disconnection and closure of relay power;The battery management module is connect with each battery cluster unit for acquiring battery cluster unit
Information of voltage, in this way, battery management module control main relay, battery cluster relay disconnect, control the anode of battery module
Relay and cathode parallel connection relay closure in parallel keeps each battery module in parallel using the consistent principle of batteries in parallel connection voltage
Weighing apparatus uses series operation after each battery module voltages are balanced, and the present invention can be realized each battery module and difference in battery cluster
In cluster between battery module quickly, it is efficiently balanced and equalization scheme high reliablity, at low cost, each module inside battery pile can be made
Voltage reaches high consistency, improves cell system voltage consistency, extends system operation time and service life.
Detailed description of the invention
Fig. 1 is a kind of circuit for voltage balance circuit for energy-storage system battery module that the embodiment of the present invention 1 provides
Figure;
Fig. 2 is a kind of circuit for voltage balance circuit for energy-storage system battery module that the embodiment of the present invention 2 provides
Figure;
Fig. 3 is a kind of circuit for voltage balance circuit for energy-storage system battery module that the embodiment of the present invention 3 provides
Figure.
Appended drawing reference is as follows:
1 --- battery cluster unit, 2 --- electric voltage equalization unit, 3 --- energy converter, 4 --- battery module, 5 ---
Positive parallel bus, 6 --- cathode parallel bus.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The embodiment of the present invention 1 provides a kind of voltage balance circuit for energy-storage system battery module, and circuit diagram is such as schemed
Shown in 1 comprising battery cluster unit 1, electric voltage equalization unit 2 and the battery management module of at least two access power grids in parallel, often
Main relay K1 is concatenated between a battery cluster unit 1 and power grid, each battery cluster unit 1 passes through electric voltage equalization unit 2
It is connect with positive and negative anodes bus, the battery management module is connect with main relay K1 and electric voltage equalization unit 2 for controlling respectively
The disconnection and closure of relay power;The battery management module is connect with each battery cluster unit 1 for acquiring battery cluster list
The information of voltage of member 1;
Each battery cluster unit 1 includes energy converter 3 and at least one battery module 4, the battery module 4
Cathode is connect with one end of energy converter 3, and the anode of the battery module 4 is connect with the other end of energy converter 3, described
Battery cluster total relay K2 and fuse FU1, the electricity are sequentially connected in series between battery module 4 and the other end of energy converter 3
Cluster total relay K2 in pond is connect with battery management module;The positive and negative anodes and electric voltage equalization unit 2 of at least one battery module 4
Connection;The battery management module is connect at least one described battery module 4.
Energy converter (PCS) is a bidirectional converter, and the convert alternating current of power grid is charged the battery for direct current, will
The direct current of battery is converted to exchange electricity output to power grid.
Wherein, the electric voltage equalization unit 2 includes anode relay K3 in parallel, cathode parallel connection relay K4;The anode
One end of relay K3 in parallel is connect with the anode of battery module 4, and the other end accesses positive parallel bus 5;The cathode is in parallel
One end of relay K4 is connect with the cathode of battery module 4, and the other end accesses cathode parallel bus 6;The battery management module
Use is connect with main relay K1, the total relay K2 of battery cluster, anode relay K3 in parallel, cathode parallel connection relay K4 respectively
In the disconnection and closure of control relay power.
Battery management module is used to control the disconnection and closure of each relay.
Wherein, current-limiting resistance RC is also serially connected between the battery module 4 relay K3 in parallel with anode;The battery mould
Fuse FU2 is also serially connected between the relay K4 in parallel with cathode of block 4.
To guarantee 4 safety of battery module, fuse FU2 is set between each battery module 4 and cathode parallel bus 6;
It is closed the electric current of moment for limitation anode parallel connection relay K3, current limliting is set between each battery module 4 and positive parallel bus 5
Resistance RC.
Wherein, the battery module 4 includes at least one single battery being serially connected.
The embodiment of the invention also provides a kind of voltage balancing method for energy-storage system battery module, this method is used
It is used for the voltage balance circuit of energy-storage system battery module, this method are as follows: the battery management module is adopted as described in Example 1
Collect the information of voltage of each battery cluster unit 1, and judge whether the information of voltage of each battery cluster unit 1 is identical, such as
The information of voltage of each battery cluster unit 1 described in fruit is different, and the battery management module controls each battery cluster unit 1 and power grid
It disconnects, then the battery management module controls each battery cluster unit 1 and is closed with electric voltage equalization unit 2, balanced described each
The voltage of battery cluster unit 1.
The specific implementation process of this method are as follows: the battery management module acquires battery module 4 in each battery cluster unit 1
Information of voltage, and judge whether the information of voltage of the battery module 4 identical, if the voltage of the battery module 4 is believed
The information of voltage of breath is different, when energy-storage system needs to carry out equilibrium to the battery module 4 in battery cluster unit 1, cell tube first
The main relay K1 managed between module control energy converter 3 and power grid is disconnected, and is then controlled the total relay K2 of battery cluster and is disconnected;
Then battery management module controls the anode relay K3 in parallel of each battery module 4, cathode parallel connection relay K4 closure, this
When, the battery module 4 in each battery cluster unit 1 is in parallel connection, completes battery module 4 in each battery cluster unit 1
Electric voltage equalization;After the completion of the electric voltage equalization of battery module 4, the anode of battery management module control battery module 4 first it is in parallel after
Electric appliance K3, cathode parallel connection relay K4 are disconnected, and are then controlled the total relay K2 closure of battery cluster, are finally controlled energy converter 3
Main relay K1 closure between power grid, it can carry out series operation.
If different in the information of voltage of the information of voltage of the battery module 4, later, further includes: the battery management
Module judges whether the voltage of battery module 4 in each battery cluster unit 1 is normal, if battery in each battery cluster unit 1
The voltage of module 4 is normal, executes the electricity of the battery management module control electric voltage equalization unit 2 each battery cluster unit 1 in parallel
Pond module 4, the voltage of the battery module 4 in balanced each battery cluster unit 1;If electric in each battery cluster unit 1
The electric voltage exception of pond module 4, the battery management module control voltage in each battery cluster unit 1 in parallel of electric voltage equalization unit 2
Normal battery module 4.
The battery module 4 is connect with battery management module, and battery management module can be to battery module 4 and battery mould
The voltage of single battery in block 4 is detected, if having single battery exception, 4 voltage of battery module beyond model in battery module 4
Enclose etc. it is abnormal, then anode between the battery module 4 and positive parallel bus 5 and cathode parallel bus 6 relay K3 in parallel and
Cathode parallel connection relay K4 is not closed, and battery management system issues prompt, which can be used manual maintenance, work as battery
The voltage that has single battery in module 4,4 voltage of battery module in the normal range when, then be closed the battery module 4 and anode simultaneously
Join the anode parallel connection relay K3 and cathode parallel connection relay K4 between bus 5 and cathode parallel bus 6, carries out energy-storage system
Electric voltage equalization.
The embodiment of the present invention 2 provides a kind of voltage balance circuit for energy-storage system battery module, and circuit diagram is such as schemed
Shown in 2 comprising battery cluster unit 1, electric voltage equalization unit 2 and the battery management module of at least two access power grids in parallel, often
Main relay K1 is concatenated between a battery cluster unit 1 and power grid, each battery cluster unit 1 passes through electric voltage equalization unit 2
It is connect with positive and negative anodes bus, the battery management module is connect with main relay K1 and electric voltage equalization unit 2 for controlling respectively
The disconnection and closure of relay power;The battery management module is connect with each battery cluster unit 1 for acquiring battery cluster list
The information of voltage of member 1.
Wherein, each battery cluster unit 1 includes energy converter 3 and at least one battery module 4, the battery mould
The cathode of block 4 is connect with one end of energy converter 3, and the anode of the battery module 4 connects with the other end of energy converter 3
It connects, battery cluster total relay K2 and fuse FU1 is sequentially connected in series between the battery module 4 and the other end of energy converter 3,
The total relay K2 of battery cluster is connect with battery management module;The positive and negative anodes and voltage of at least one battery module 4 are equal
The unit 2 that weighs connects;The battery management module is connect at least one described battery module 4.
Energy converter (PCS) is a bidirectional converter, and the convert alternating current of power grid is charged the battery for direct current, will
The direct current of battery is converted to exchange electricity output to power grid.
Battery management module is used to control the disconnection and closure of each relay.
Wherein, when two or more are arranged in the battery module 4, each battery module 4 in sequential series, phase in the same direction
Connect in series relay K5 between adjacent two each battery modules 4, and the series relay K5 and battery management module connect
It connects;The positive and negative anodes and electric voltage equalization unit 2 of each battery module 4.
Wherein, the battery module 4 includes at least one single battery being serially connected.
To guarantee that battery management module can carry out the voltage of the single battery in battery module 4 and battery module 4
Each battery module 4 is detected to connect with battery management module.
Wherein, the electric voltage equalization unit 2 includes anode relay K3 in parallel, cathode parallel connection relay K4;The anode
One end of relay K3 in parallel is connect with the anode of battery module 4, and the other end accesses positive parallel bus 5;The cathode is in parallel
One end of relay K4 is connect with the cathode of battery module 4, and the other end accesses cathode parallel bus 6;The battery management module
Use is connect with main relay K1, the total relay K2 of battery cluster, anode relay K3 in parallel, cathode parallel connection relay K4 respectively
In the disconnection and closure of control relay power.
Wherein, current-limiting resistance RC is also serially connected between the battery module 4 relay K3 in parallel with anode;The battery mould
Fuse FU2 is also serially connected between the relay K4 in parallel with cathode of block 4.
To guarantee 4 safety of battery module, fuse FU2 is set between each battery module 4 and cathode parallel bus 6;
It is closed the electric current of moment for limitation anode parallel connection relay K3, current limliting is set between each battery module 4 and positive parallel bus 5
Resistance RC.
The embodiment of the invention also provides a kind of voltage balancing method for energy-storage system battery module, this method is used
It is used for the voltage balance circuit of energy-storage system battery module as described in Example 2, when the battery module 4 includes two or two
When a above battery module 4, this method specifically: the battery management module acquires each electricity in each battery cluster unit 1
The information of voltage of pond module 4, and judge whether the information of voltage of each battery module 4 is identical, if each electricity
The information of voltage of the information of voltage of pond module 4 is different, and the battery management module controls main relay K1, the total relay of battery cluster
K2, series relay K5 are disconnected, then the anode relay in parallel in the battery management module control electric voltage equalization unit 2
K3, cathode parallel connection relay K4 closure, the voltage of each battery module 4 of balanced each battery cluster unit 1.
The specific implementation process of this method are as follows: the battery management module acquires each battery in each battery cluster unit 1
The information of voltage of module 4, and judge whether the information of voltage of each battery module 4 is identical, if each battery
The information of voltage of the information of voltage of module 4 is different, and energy-storage system needs to carry out each battery module 4 in battery cluster unit 1
When balanced, the main relay K1 first between battery management module control energy converter 3 and power grid is disconnected, and then controls battery
The total relay K2 of cluster is disconnected, then disconnects the series relay K5 between each battery module 4;Then battery management module control is each
The anode of battery module 4 relay K3 in parallel, cathode parallel connection relay K4 closure, at this point, each of each battery cluster unit 1
Battery module 4 is in parallel connection, completes the electric voltage equalization of each battery module 4 in each battery cluster unit 1;Battery module 4
Electric voltage equalization after the completion of, the anode of battery management module control battery module 4 first relay K3 in parallel, cathode parallel connection relay
Device K4 is disconnected, and then controls the series relay K5 closure between each battery module 4, then control the total relay K2 of battery cluster and close
It closes, the main relay K1 finally controlled between energy converter 3 and power grid is closed, it can carries out series operation.
Judge whether the information of voltage of each battery module 4 is identical, later, further includes: the battery management module
Judge whether the voltage of battery module 4 in each battery cluster unit 1 is normal, if battery module 4 in each battery cluster unit 1
Voltage it is normal, execute each electricity in each battery cluster unit 1 in parallel of battery management module control electric voltage equalization unit 2
Pond module 4, the voltage of each battery module 4 in balanced each battery cluster unit 1;If each battery cluster unit 1
In battery module 4 electric voltage exception, each battery cluster unit 1 in parallel of battery management module control electric voltage equalization unit 2
The middle normal battery module 4 of voltage.
The battery module 4 is connect with battery management module, and battery management module can be to battery module 4 and battery mould
The voltage of single battery in block 4 is detected, if having single battery exception, 4 voltage of battery module beyond model in battery module 4
Enclose etc. it is abnormal, then anode between the battery module 4 and positive parallel bus 5 and cathode parallel bus 6 relay K3 in parallel and
Cathode parallel connection relay K4 is not closed, and battery management system issues prompt, which can be used manual maintenance, work as battery
The voltage that has single battery in module 4,4 voltage of battery module in the normal range when, then be closed the battery module 4 and anode simultaneously
Join the anode parallel connection relay K3 and cathode parallel connection relay K4 between bus 5 and cathode parallel bus 6, carries out energy-storage system
Electric voltage equalization.
The embodiment of the present invention 3 provides a kind of voltage balance circuit for energy-storage system battery module, and circuit diagram is such as schemed
Shown in 3 comprising battery cluster unit 1, electric voltage equalization unit 2 and the battery management module of at least two access power grids in parallel, often
Main relay K1 is concatenated between a battery cluster unit 1 and power grid, each battery cluster unit 1 passes through electric voltage equalization unit 2
It is connect with positive and negative anodes bus, the battery management module is connect with main relay K1 and electric voltage equalization unit 2 for controlling respectively
The disconnection and closure of relay power;The battery management module is connect with each battery cluster unit 1 for acquiring battery cluster list
The information of voltage of member 1.
Each battery cluster unit 1 includes energy converter 3 and at least one battery module 4, the battery module 4
Cathode is connect with one end of energy converter 3, and the anode of the battery module 4 is connect with the other end of energy converter 3, described
Battery cluster total relay K2 and fuse FU1, the electricity are sequentially connected in series between battery module 4 and the other end of energy converter 3
Cluster total relay K2 in pond is connect with battery management module;The positive and negative anodes and electric voltage equalization unit 2 of at least one battery module 4
Connection;The battery management module is connect at least one described battery module 4.
Energy converter (PCS) is a bidirectional converter, and the convert alternating current of power grid is charged the battery for direct current, will
The direct current of battery is converted to exchange electricity output to power grid.
Wherein, when two or more are arranged in the battery cluster unit 1, two neighboring each battery cluster unit
Stringing cells cluster parallel connection relay K6 between 1 battery module 4, the battery cluster parallel connection relay K6 and battery management module connect
It connects;
Wherein, when two or more are arranged in battery module 4 in each battery cluster unit 1, each battery mould
Block 4 is in sequential series in the same direction, and connect in series relay K5 between two neighboring each battery module 4, the series relay
K5 is connect with battery management module;The positive and negative anodes and electric voltage equalization unit 2 of each battery module 4.
Wherein, the battery module 4 includes at least one single battery being serially connected.
To guarantee that battery management module can carry out the voltage of the single battery in battery module 4 and battery module 4
Each battery module 4 is detected to connect with battery management module.
Wherein, the electric voltage equalization unit 2 includes anode relay K3 in parallel, cathode parallel connection relay K4;The anode
One end of relay K3 in parallel is connect with the anode of battery module 4, and the other end accesses positive parallel bus 5;The cathode is in parallel
One end of relay K4 is connect with the cathode of battery module 4, and the other end accesses cathode parallel bus 6;The battery management module
Use is connect with main relay K1, the total relay K2 of battery cluster, anode relay K3 in parallel, cathode parallel connection relay K4 respectively
In the disconnection and closure of control relay power.
Battery management module is used to control the disconnection and closure of each relay.
Wherein, current-limiting resistance RC is also serially connected between the battery module 4 relay K3 in parallel with anode;The battery mould
Fuse FU2 is also serially connected between the relay K4 in parallel with cathode of block 4.
To guarantee 4 safety of battery module, fuse FU2 is set between each battery module 4 and cathode parallel bus 6;
It is closed the electric current of moment for limitation anode parallel connection relay K3, current limliting is set between each battery module 4 and positive parallel bus 5
Resistance RC.
The embodiment of the invention also provides a kind of voltage balancing method for energy-storage system battery module, this method is used
As described in Example 3 be used for energy-storage system battery module voltage balance circuit, when the battery cluster unit 1 be arranged two or
It, should when the battery module 4 of each battery cluster unit 1 includes two or more battery modules 4 when more than two
Method specifically: the battery management module acquires the information of voltage of each battery module 4 in each battery cluster unit 1, and
Judge whether the information of voltage of each battery module 4 is identical, if the voltage of the information of voltage of each battery module 4
Information is different, and the battery management module control main relay K1, the total relay K2 of battery cluster, series relay K5 are disconnected, so
Anode relay K3 in parallel in the battery management module control electric voltage equalization unit 2, cathode parallel connection relay K4 closure afterwards,
The voltage of each battery module 4 of balanced each battery cluster unit 1;Each electricity of balanced each battery cluster unit 1
The voltage of pond module 4, later, further includes: the battery management module control battery cluster parallel connection relay K6 is closed, described in equilibrium
The voltage of each battery module 4 in different battery cluster units 1.
The specific implementation process of this method are as follows: the specific implementation process of this method are as follows: the battery management module acquisition is every
The information of voltage of each battery module 4 in a battery cluster unit 1, and judge that the information of voltage of each battery module 4 is
No identical, if the information of voltage of the information of voltage of each battery module 4 is different, energy-storage system is needed to battery cluster unit
When each battery module 4 in 1 carries out equilibrium, first battery management module control energy converter 3 and power grid between master after
Electric appliance K1 is disconnected, and is then controlled the total relay K2 of battery cluster and is disconnected, then disconnects the series relay K5 between each battery module 4;
Then battery management module controls the anode relay K3 in parallel of each battery module 4, cathode parallel connection relay K4 closure, this
When, each battery module 4 in each battery cluster unit 1 is in parallel connection, completes each battery in each battery cluster unit 1
The electric voltage equalization of module 4;Later, when energy-storage system needs to carry out balanced to the battery module of battery cluster unit 1 parallel with one another,
The battery cluster parallel connection relay K6 being closed between adjacent cell cluster unit 1, at this point, each battery in adjacent cell cluster unit 1
Module 4 is in parallel connection, completes the electric voltage equalization of each battery module 4 in different battery cluster units 1, to make different electricity
Voltage between pond cluster unit 1 reaches consistent;After the voltage of balanced each battery cluster unit 1, firstly, control adjacent cell cluster list
Battery cluster parallel connection relay K6 between member 1 is disconnected, the anode relay K3 in parallel of battery management module control battery module 4,
Cathode parallel connection relay K4 is disconnected, and then controls the series relay K5 closure between each battery module 4, then control battery cluster
Total relay K2 closure, the main relay K1 finally controlled between energy converter 3 and power grid are closed, it can carry out series connection fortune
Row.
The battery management module acquires the information of voltage of each battery module 4 in each battery cluster unit 1, and judges
Whether the information of voltage of each battery module 4 is identical, later, further includes: the battery management module judges each battery
Whether the voltage of each battery module 4 normal in cluster unit 1, if in each battery cluster unit 1 each battery module 4 electricity
Positive pressure is normal, executes each battery mould in the battery management module control electric voltage equalization unit 2 each battery cluster unit 1 in parallel
Block 4, the voltage of each battery module 4 in balanced each battery cluster unit 1;If in each battery cluster unit 1
The electric voltage exception of battery module 4, the battery management module control electricity in each battery cluster unit 1 in parallel of electric voltage equalization unit 2
Press normal battery module 4.
The battery module 4 is connect with battery management module, and battery management module can be to battery module 4 and battery mould
The voltage of single battery in block 4 is detected, if having single battery exception, 4 voltage of battery module beyond model in battery module 4
Enclose etc. it is abnormal, then anode between the battery module 4 and positive parallel bus 5 and cathode parallel bus 6 relay K3 in parallel and
Cathode parallel connection relay K4 is not closed, and battery management system issues prompt, which can be used manual maintenance, work as battery
The voltage that has single battery in module 4,4 voltage of battery module in the normal range when, then be closed the battery module 4 and anode simultaneously
Join the anode parallel connection relay K3 and cathode parallel connection relay K4 between bus 5 and cathode parallel bus 6, carries out energy-storage system
Electric voltage equalization.
In conclusion the present invention provides a kind of voltage balance circuit for energy-storage system battery module and its voltage are equal
Weighing apparatus method, battery management module controls main relay, battery cluster relay disconnects, and controls the anode relay in parallel of battery module
It is closed with cathode parallel connection relay, using the consistent principle of batteries in parallel connection voltage, keeps each battery module in parallel balanced, each battery mould
Series operation is used after block electric voltage equalization, the present invention can be realized in battery cluster battery module in each battery module and different clusters
Between quickly, it is efficiently balanced and equalization scheme high reliablity, at low cost, each module voltage inside battery pile can be made to reach height
Consistency improves cell system voltage consistency, extends system operation time and service life.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (10)
1. a kind of voltage balance circuit for energy-storage system battery module, which is characterized in that it includes at least two and couples
Battery cluster unit, electric voltage equalization unit and the battery management module for entering power grid, concatenate between each battery cluster unit and power grid
Main relay K1, each battery cluster unit are connect by electric voltage equalization unit with positive and negative anodes bus, the battery management mould
Block connect disconnection and closure for controlling relay power with main relay K1 and electric voltage equalization unit respectively;The cell tube
Reason module connect the information of voltage for acquiring battery cluster unit with each battery cluster unit.
2. the voltage balance circuit according to claim 1 for energy-storage system battery module, which is characterized in that described every
A battery cluster unit includes energy converter and at least one battery module, the cathode of the battery module and energy converter
The anode of one end connection, the battery module is connect with the other end of energy converter, the battery module and energy converter
The other end between be sequentially connected in series the total relay K2 of battery cluster and fuse FU1, the total relay K2 of the battery cluster and cell tube
Manage module connection;The positive and negative anodes of at least one battery module are connect with electric voltage equalization unit;The battery management module with
At least one battery module connection.
3. the voltage balance circuit according to claim 2 for energy-storage system battery module, which is characterized in that the electricity
Pressing balanced unit includes anode relay K3 in parallel, cathode parallel connection relay K4;One end of the anode relay K3 in parallel with
The anode connection of battery module, the other end access positive parallel bus;One end of the cathode parallel connection relay K4 and battery mould
The cathode of block connects, and the other end accesses cathode parallel bus;The battery management module is total with main relay K1, battery cluster respectively
Relay K2, anode relay K3 in parallel, cathode parallel connection relay K4 connection for control relay power disconnection and
Closure.
4. the voltage balance circuit according to claim 3 for energy-storage system battery module, which is characterized in that the electricity
Current-limiting resistance RC is also serially connected between pond module relay K3 in parallel with anode;Battery module relay K4 in parallel with cathode
Between be also serially connected with fuse FU2.
5. the voltage balance circuit according to claim 4 for energy-storage system battery module, which is characterized in that the electricity
Pond module includes the single battery that at least one is serially connected.
6. the voltage balance circuit according to claim 5 for energy-storage system battery module, which is characterized in that when described
When two or more are arranged in battery module, each battery module is in sequential series in the same direction, two neighboring each battery mould
Connect in series relay K5 between block, and the series relay K5 is connect with battery management module.
7. the voltage balance circuit according to claim 6 for energy-storage system battery module, which is characterized in that when described
When two or more are arranged in battery cluster unit, electricity is concatenated between the battery module of two neighboring each battery cluster unit
Pond cluster parallel connection relay K6, the battery cluster parallel connection relay K6 are connect with battery management module.
8. a kind of voltage balancing method for energy-storage system battery module, this method uses such as claim 1-7 any one
The voltage balance circuit for energy-storage system battery module, which is characterized in that this method are as follows: the battery management module
The information of voltage of each battery cluster unit is acquired, and judges whether the information of voltage of each battery cluster unit is identical, such as
The information of voltage of each battery cluster unit described in fruit is different, and the battery management module controls each battery cluster unit and power grid is disconnected
It opens, then the battery management module controls each battery cluster unit and electric voltage equalization unit is closed, balanced each battery
The voltage of cluster unit.
9. the voltage balancing method according to claim 8 for energy-storage system battery module, which is characterized in that this method
Specifically: the battery management module acquires the information of voltage of each battery module in each battery cluster unit, and judges institute
Whether the information of voltage for stating each battery module is identical, if the information of voltage of the information of voltage of each battery module is not
Together, the battery management module control main relay K1, the total relay K2 of battery cluster, series relay K5 are disconnected, then described
Battery management module controls the relay K3 in parallel of the anode in electric voltage equalization unit, cathode parallel connection relay K4 closure, balanced institute
State the voltage of each battery module of each battery cluster unit.
10. the voltage balancing method according to claim 9 for energy-storage system battery module, which is characterized in that work as institute
When stating battery cluster unit two or more being set, the voltage of each battery module of balanced each battery cluster unit,
Later, further includes: the battery management module control battery cluster parallel connection relay K6 closure, the balanced different battery cluster units
In each battery module voltage.
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112467839A (en) * | 2020-11-23 | 2021-03-09 | 阳光电源股份有限公司 | Battery cluster management device and battery energy storage system |
CN113632340A (en) * | 2021-06-28 | 2021-11-09 | 远景能源有限公司 | Battery system and balance management method thereof |
CN113690982A (en) * | 2021-08-26 | 2021-11-23 | 成都振中电气集团有限公司 | Inter-cluster voltage balancing device based on half-bridge Buck principle |
CN114204647A (en) * | 2022-01-06 | 2022-03-18 | 上海交通大学 | Parallel battery cluster state management system and parallel battery cluster |
CN114498796A (en) * | 2020-11-12 | 2022-05-13 | 智一新能源发展有限公司 | High-voltage parallel connection device, energy storage matrix, system and use method thereof |
CN114498797A (en) * | 2020-11-12 | 2022-05-13 | 智一新能源发展有限公司 | Low-voltage parallel connection device, energy storage matrix, system and use method thereof |
CN115800420A (en) * | 2022-09-20 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Energy storage system and method for regulating an energy storage system |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120086390A1 (en) * | 2009-01-30 | 2012-04-12 | Korea Advanced Institute Of Science And Technology | Charge Equalization Apparatus And Method For Series-Connected Battery String |
CN103227494A (en) * | 2013-05-17 | 2013-07-31 | 北京华电天仁电力控制技术有限公司 | Energy storage battery management system |
CN103730936A (en) * | 2014-01-03 | 2014-04-16 | 桂林电子科技大学 | Electric automobile power battery equalization management system and method |
CN104993602A (en) * | 2015-06-22 | 2015-10-21 | 北京清能世福科技有限公司 | Modular energy storage system |
CN205160118U (en) * | 2015-11-03 | 2016-04-13 | 北京普莱德新能源电池科技有限公司 | Equalization circuit for battery pack |
CN106058986A (en) * | 2016-07-04 | 2016-10-26 | 武汉理工大学 | Automotive battery equalization circuit based on lithium iron phosphate |
CN207442455U (en) * | 2017-11-07 | 2018-06-01 | 银隆新能源股份有限公司 | A kind of voltage balance circuit for energy-storage system battery module |
-
2017
- 2017-11-07 CN CN201711087024.5A patent/CN109755948A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120086390A1 (en) * | 2009-01-30 | 2012-04-12 | Korea Advanced Institute Of Science And Technology | Charge Equalization Apparatus And Method For Series-Connected Battery String |
CN103227494A (en) * | 2013-05-17 | 2013-07-31 | 北京华电天仁电力控制技术有限公司 | Energy storage battery management system |
CN103730936A (en) * | 2014-01-03 | 2014-04-16 | 桂林电子科技大学 | Electric automobile power battery equalization management system and method |
CN104993602A (en) * | 2015-06-22 | 2015-10-21 | 北京清能世福科技有限公司 | Modular energy storage system |
CN205160118U (en) * | 2015-11-03 | 2016-04-13 | 北京普莱德新能源电池科技有限公司 | Equalization circuit for battery pack |
CN106058986A (en) * | 2016-07-04 | 2016-10-26 | 武汉理工大学 | Automotive battery equalization circuit based on lithium iron phosphate |
CN207442455U (en) * | 2017-11-07 | 2018-06-01 | 银隆新能源股份有限公司 | A kind of voltage balance circuit for energy-storage system battery module |
Non-Patent Citations (1)
Title |
---|
刘建国 主编: "可再生能源导论", 中国轻工业出版社, pages: 320 - 329 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114498796A (en) * | 2020-11-12 | 2022-05-13 | 智一新能源发展有限公司 | High-voltage parallel connection device, energy storage matrix, system and use method thereof |
CN114498797A (en) * | 2020-11-12 | 2022-05-13 | 智一新能源发展有限公司 | Low-voltage parallel connection device, energy storage matrix, system and use method thereof |
CN112467839A (en) * | 2020-11-23 | 2021-03-09 | 阳光电源股份有限公司 | Battery cluster management device and battery energy storage system |
CN112467839B (en) * | 2020-11-23 | 2023-09-29 | 阳光电源股份有限公司 | Battery cluster management device and battery energy storage system |
CN113632340A (en) * | 2021-06-28 | 2021-11-09 | 远景能源有限公司 | Battery system and balance management method thereof |
CN113690982A (en) * | 2021-08-26 | 2021-11-23 | 成都振中电气集团有限公司 | Inter-cluster voltage balancing device based on half-bridge Buck principle |
CN113690982B (en) * | 2021-08-26 | 2024-05-28 | 成都振中电气集团有限公司 | Inter-cluster voltage balancing device based on half-bridge Buck principle |
CN114204647A (en) * | 2022-01-06 | 2022-03-18 | 上海交通大学 | Parallel battery cluster state management system and parallel battery cluster |
CN114204647B (en) * | 2022-01-06 | 2023-11-24 | 上海交通大学 | Parallel battery cluster state management system and parallel battery cluster |
CN115800420A (en) * | 2022-09-20 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Energy storage system and method for regulating an energy storage system |
CN115800420B (en) * | 2022-09-20 | 2023-10-20 | 宁德时代新能源科技股份有限公司 | Energy storage system and method for regulating an energy storage system |
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