CN202856396U - Energy storage system storage battery module on-line automatic bidirectional equalization device - Google Patents

Energy storage system storage battery module on-line automatic bidirectional equalization device Download PDF

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Publication number
CN202856396U
CN202856396U CN 201220443982 CN201220443982U CN202856396U CN 202856396 U CN202856396 U CN 202856396U CN 201220443982 CN201220443982 CN 201220443982 CN 201220443982 U CN201220443982 U CN 201220443982U CN 202856396 U CN202856396 U CN 202856396U
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China
Prior art keywords
battery
module
battery module
charge
storage system
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Expired - Fee Related
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CN 201220443982
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Chinese (zh)
Inventor
毛永志
王成松
王瑞军
陈继昌
刘辉
刘正耀
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RiseSun MGL New Energy Technology Co Ltd
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CITIC Guoan Mengguli Power Technology Co Ltd
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Abstract

The utility model discloses an energy storage system storage battery module on-line automatic bidirectional equalization device which includes a data acquisition and analysis control center, a charging and discharging unit, and a switch control circuit. The data acquisition and analysis control center collects the parameters of battery modules and analyzes the parameters, and then determines whether or not the equalization is required, if the equalization is required, the control circuit is turned on, and at the same time, a charging or discharging command is made. The charging and discharging unit charges and discharges the battery modules according to the command of the data acquisition and analysis control center. The switch control circuit is connected with the battery modules and the charging and discharging unit via controllers, and turns on or off the controllers of corresponding battery modules according to the received command of the data acquisition and analysis control center. The equalization device shortens the maintenance time of the energy storage system storage battery modules and reduces the work load of a worker. A multi-cluster battery system can jointly use one same charging and discharging unit, so the cost is saved.

Description

The on-line automatic bidirectional equalization device of a kind of energy-storage system battery module
Technical field
The utility model relates to a kind of storage battery balancer, relates in particular to the on-line automatic bidirectional equalization device of a kind of energy-storage system battery module.
Background technology
The storage battery in recent years application in the energy storage field is more and more extensive, and fairly large batteries to store energy power station development rapidly.In the battery applications system, battery system is generally by a plurality of module compositions, and each module forms after by a plurality of cell connection in series-parallel, and the maintenance of battery all is as unit take battery module.
When if certain battery module breaks down in the system, the fail battery module be pulled down, this bunch cell circuit quits work, and after the upper reserve battery module to be replaced, this bunch cell circuit is resumed work.The state-of-charge (SOC) of general reserve battery module is inconsistent with the SOC of whole bunch of battery, normally off-line is adjusted (normally charge or discharge) to after this bunch battery SOC is consistent with the reserve battery module, install again, the adjustment period between this bunch cell circuit can't work.The shortcoming of this kind way is that system maintenance time is long, and cell circuit can't be worked during the maintenance, and systematic function is under some influence, and needs artificial treatment.Break down simultaneously such as two-way or multichannel battery module, the fail safe of battery system will be affected.
Summary of the invention
Off-line operation when safeguarding in order to overcome the system battery module that exists in the prior art, fail safe is low, the deficiency that staff's workload is large, the utility model provide a kind of can on-line automatic balancer, be characterized in on-line automatic bidirectional equalization, safeguard that required time is short.
The technical scheme that its technical problem that solves the utility model adopts is:
The on-line automatic bidirectional equalization device of a kind of energy-storage system battery module comprises:
Data collection and analysis control centre gathers the parameter of each battery module, and parameter is analyzed, and need to judge whether equilibrium, needs to connect control circuit, simultaneously the Instruction Selection charge or discharge when balanced;
Charge/discharge unit carries out charge or discharge according to the instruction of data collection and analysis control centre to each battery module;
ON-OFF control circuit according to the instruction of receiving data collection and analysis control centre, is switched on or switched off the controller of respective battery modules.
Wherein, data collection and analysis control centre is comprised of battery management slave plate and battery management mainboard two parts, the battery management slave plate is collected the parameter of each battery module and is uploaded to the battery management mainboard, the battery management mainboard gathers real-time circulation voltage and the SOC of each battery module, and calculate average module voltage and SOC, the controller UNICOM of control control circuit during more than or equal to the module of balanced threshold values to the difference of voltage or SOC and average module voltage or SOC, to SOC or the low module charging of voltage, for the high module discharge of SOC or voltage, breaking controller when treating the voltage of described module and SOC difference less than balanced threshold values.
Wherein, controller is relay.
Wherein, preferably, relay can adopt direct current relay or adopt the IGBT assembly
Wherein, the battery system that is made of N bunch of battery module can have 1~N charge/discharge unit.
Wherein, the connection between battery management mainboard, battery management slave plate, control relay circuit, the charge/discharge unit adopts CAN, RS-485, LIN.
Wherein, described battery module is lithium ion battery, lead acid accumulator, nickel-cadmium cell or Ni-MH battery.
Control relay circuit can make according to the order of battery management mainboard a specific relay closes or disconnection; Charge/discharge unit can be in according to the order of battery management mainboard charged state or discharge condition, thereby realizes the on-line automatic equilibrium of the module of needs equilibrium, and battery system can work simultaneously; Many bunches of battery systems can share a charge/discharge unit, and mutually communication between each battery management mainboard makes the battery system that shares a charge/discharge unit can only closed relay at one time; When having a plurality of modules to need equilibrium, first balanced one of them battery module of equalizing system, balanced other need the module of equilibrium again after equilibrium is finished.
Battery management mainboard real-time circulation gathers voltage and the SOC of each battery module, and calculate average module voltage and SOC, voltage or SOC difference are carried out equilibrium more than or equal to the module of balanced threshold values, to SOC or the low module charging of voltage, for the high module discharge of SOC or voltage, stop equilibrium when treating the voltage of described module and SOC difference less than balanced threshold values.In the balancing procedure, this bunch cell circuit can work, and equilibrium is carried out online, and need not personal management, automatically finishes.
The beneficial effects of the utility model are:
1, shortened the time that the energy-storage system battery module is safeguarded.
2, reduced staff's workload.
3, many bunches of battery systems can share a charge/discharge unit.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the circuit theory diagrams that many bunches of battery systems of the present utility model share a charge/discharge unit.
Fig. 3 is N of the present utility model bunch battery with 1~N charge/discharge unit circuit theory diagrams.
Fig. 4 is control flow chart of the present utility model.
Embodiment
The on-line automatic bidirectional equalization device of a kind of energy-storage system battery module of the present utility model comprises: data collection and analysis control centre, charge/discharge unit and ON-OFF control circuit.Installing applicable storage battery can be lithium ion battery, lead acid accumulator, nickel-cadmium cell, Ni-MH battery.As shown in the figure, preferred relay is as controller, and relay can adopt direct current relay, also can adopt the IGBT assembly, the control relay circuit that ON-OFF control circuit normally is made of various relays.Data collection and analysis control centre is comprised of battery management slave plate and battery management mainboard two parts, battery module is by the voltage acquisition line, the temperature acquisition line, current signal gathers line and is connected with the battery management slave plate, the battery management slave plate is connected with the battery management mainboard with the 12/24VDC power line by CAN or RS485 connection, the battery management mainboard is connected with control relay circuit with charge/discharge unit respectively by connection, the charge/discharge unit DC side is parallel-connected to the relay corresponding with each battery module one side by wire, the relay opposite side is wired to the two poles of the earth of respective modules, and control relay circuit is connected with each relay coil by control line.Connection between battery management mainboard, battery management slave plate, control relay circuit, the charge/discharge unit can adopt CAN, RS-485, LIN etc.
The function of each part:
Battery module: chemical energy storage device.
The battery management slave plate: monomer voltage, temperature, current acquisition, SOC, SOH estimation, monomer is balanced, with the communication of battery management mainboard, uploading data, Control.
The battery management mainboard: with the communication of battery management slave plate, and data that the battery management slave plate is uploaded and carry out computational analysis, SOC, SOH estimation, Control, with charger or other relevant device communications, accident analysis, online alarm logging.
Control relay circuit: according to the data that the battery management mainboard provides, control corresponding relay closes or disconnection.
Relay: the two poles of the earth that are switched on or switched off DC side and the respective battery modules of charge/discharge unit.
Charge/discharge unit: the requirement according to the battery management mainboard begins or finishes to discharge and recharge.
In Fig. 1, the on-line automatic bidirectional equalization device of a kind of energy-storage system battery module comprises: the parts such as battery module, battery management mainboard, battery management slave plate, control relay circuit, relay, charge/discharge unit.
Relay circuit adopts a plurality of two contact direct current relays, and two terminal contacts of each relay are wired to respectively on each battery module both positive and negative polarity, and other two terminal contacts of each relay are parallel to the DC side of charge-discharge modules.Relay circuit also can adopt the IGBT pipe belt for mechanical relay.
Isolating transformer is arranged in the charge/discharge unit, and its mains side can be that DC power supply also can be AC power.
Embodiment 1-1: storage battery is lithium ion battery, and the monomer capacity is 90Ah, and rated voltage is 3.8V, and battery system is 4 and 180 strings.This system is divided into 15 modules, and each module is 4 and 12 strings, and the module rated voltage is 3.8V * 12=45.6V, and module capacity is 90Ah * 4=360Ah.Charge/discharge unit DC side rated voltage is 46V, and power is 1.5kW.Relay adopts 15 direct current relays.
Embodiment 1-2: storage battery is lithium ion battery, and the monomer capacity is 25Ah, and rated voltage is 3.7V, and battery system is 4 and 100 strings.This system is divided into 10 modules, and each module is 4 and 10 strings, and the module rated voltage is 3.7V * 10=37V, and module capacity is 25Ah * 4=100Ah.Charge/discharge unit DC side rated voltage is 37V, and power is 0.8kW.Relay adopts 10 IGBT pipes.
In Fig. 2, in each bunch battery system, two terminal contacts of all relays are parallel to the DC side of charge/discharge unit; By mutual communication, only have in guaranteeing at one time the relay can be closed between the battery management mainboard; When having a module to need equilibrium in the system, the battery management mainboard of respective cluster is controlled disconnection or the closure of corresponding relay by control relay circuit, thereby realizes the equilibrium to battery module.
Charge/discharge unit of embodiment 2-1:5 bunch battery sharing, every bunch of battery is made of 2 and 140 batteries of going here and there, and take 2 and 10 strings as a module, every bunch of battery has 14 modules.
Charge/discharge unit of embodiment 2-2:20 bunch battery sharing, every bunch of battery is made of 3 and 90 batteries of going here and there, and take 3 and 9 strings as a module, every bunch of battery has 10 modules.
In Fig. 3, if a battery system has N bunch of battery, can be with 1~N charge/discharge unit.
Embodiment 3-1: system has 9 bunches of batteries, charge/discharge unit of 5 bunches of battery sharings wherein, and 4 bunches share charge/discharge units in addition, and then whole system need to be with 2 charge-discharge modules.
Embodiment 3-2: system has 20 bunches of batteries, charge/discharge unit of per 5 bunches of battery sharings, and then whole system need to be with 4 charge-discharge modules.
Embodiment 3-3: system has 100 bunches of batteries, charge/discharge unit of per 10 bunches of battery sharings, and then whole system need to be with 10 charge-discharge modules.
Many bunches of battery systems can share a charge/discharge unit, also can use a plurality of charge/discharge units, also can be designed to N battery module and adopt 1 form to N charge/discharge unit.
In Fig. 4, working-flow is as follows:
1, the battery management mainboard is analyzed each battery module parameter, need to judge whether equilibrium, be whether the voltage of each battery module and the average voltage of SOC and module and the difference of SOC open threshold values greater than the equilibrium of setting, if its difference is less than threshold values, show the better harmonious of intermodule, equilibrium need not to open, and continues to return each module parameter of detection; If it is harmonious bad that the average voltage of certain battery module voltage or SOC and module or the difference of SOC more than or equal to the threshold values of setting, show between battery module, need to open balanced.
2, the startup balancing procedure is as follows: the battery management mainboard finds module voltage or SOC to need balanced module, outputs a control signal to control relay circuit, relay adhesive corresponding to control relay circuit control, the DC side of connection charge/discharge unit; Simultaneously, battery management mainboard control charge/discharge unit carries out charge or discharge to battery module.
3, the battery management mainboard continues the acquisition module data analysis after balanced the unlatching, if the difference by balanced battery module voltage and SOC and average module voltage and SOC starts threshold values less than equilibrium, then disconnect corresponding relay, charge/discharge unit quits work, equilibrium stops, and forwards flow process 1 to and continues to carry out.
Embodiment 4-1: the SOC of module is 70% in the system, one of them module breaks down, need to change the reserve battery module, the SOC of reserve battery module is 40%, after the reserve battery module is installed, the battery management mainboard detects and control corresponding relay and charge/discharge unit charges to the module of changing, until the SOC of described module when consistent with the SOC of module in the system, stops charging.After spare module is installed and in the balancing procedure, battery system can work.
Embodiment 4-2: the SOC of module is 50% in the system, one of them module breaks down, need to change the reserve battery module, the SOC of reserve battery module is 80%, after the reserve battery module is installed, the battery management mainboard detects and control corresponding relay and charge/discharge unit discharges to the module of changing, until the SOC of described module when consistent with the SOC of module in the system, stops discharge.After spare module is installed and in the balancing procedure, battery system can work.
Certainly should recognize, although carried out the description of front by example of the present utility model, to the utility model make will to those skilled in the art apparent like this and other improvement and change should think and fall into as in the utility model broad range in this paper.Therefore, although the utility model with reference to preferred embodiment be described,, its meaning is not that the equipment of tool novelty is restricted therefrom, on the contrary, it is intended to comprise various improvement and equivalent modifications within the broad range that meets above-mentioned open part, claim.

Claims (6)

1. on-line automatic bidirectional equalization device of energy-storage system battery module comprises:
Data collection and analysis control centre gathers the parameter of each battery module, and parameter is analyzed, and need to judge whether equilibrium, needs to connect control circuit, simultaneously the Instruction Selection charge or discharge when balanced;
Charge/discharge unit carries out charge or discharge according to the instruction of data collection and analysis control centre to each battery module;
ON-OFF control circuit connects each battery module and charge/discharge unit by controller, according to the instruction of data collection and analysis control centre, is switched on or switched off being connected of respective battery modules and charge/discharge unit.
2. the on-line automatic bidirectional equalization device of energy-storage system battery module as claimed in claim 1, it is characterized in that: data collection and analysis control centre is comprised of battery management slave plate and battery management mainboard two parts, the battery management slave plate is collected the parameter of each battery module and is uploaded to the battery management mainboard, the battery management mainboard gathers real-time circulation voltage and the SOC of each battery module, when the voltage of certain module or SOC difference during more than or equal to balanced threshold values, the battery management mainboard sends instructions to control circuit, the controller of control circuit UNICOM corresponding module, to SOC or the low module charging of voltage, for the high module discharge of SOC or voltage, breaking controller when treating the voltage of described module and SOC difference less than balanced threshold values.
3. the on-line automatic bidirectional equalization device of energy-storage system battery module as claimed in claim 1 or 2, it is characterized in that: described controller is relay, IGBT assembly.
4. the on-line automatic bidirectional equalization device of energy-storage system battery module as claimed in claim 1 or 2, it is characterized in that: the battery system that is made of N bunch of battery module can have 1~N charge/discharge unit.
5. the on-line automatic bidirectional equalization device of energy-storage system battery module as claimed in claim 2 is characterized in that: connection employing CAN, RS-485 between battery management mainboard, battery management slave plate, control relay circuit, the charge/discharge unit, LIN.
6. the on-line automatic bidirectional equalization device of energy-storage system battery module as claimed in claim 1 or 2, it is characterized in that: described battery module is lithium ion battery, lead acid accumulator, nickel-cadmium cell or Ni-MH battery.
CN 201220443982 2012-08-31 2012-08-31 Energy storage system storage battery module on-line automatic bidirectional equalization device Expired - Fee Related CN202856396U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414224A (en) * 2013-08-14 2013-11-27 惠州市亿能电子有限公司 High-capacity high-voltage integrated battery pack system and control method thereof
CN103683341A (en) * 2012-08-31 2014-03-26 中信国安盟固利动力科技有限公司 On-line two-way balancing device for energy storage system battery modules
CN104734236A (en) * 2013-12-19 2015-06-24 北汽福田汽车股份有限公司 Battery pack charging and discharging device and method
CN105210259A (en) * 2013-04-09 2015-12-30 Evtd株式会社 Balance correction apparatus and storage system
CN105470555A (en) * 2016-01-26 2016-04-06 宁波市北仑海伯精密机械制造有限公司 Power battery pack structure and management method thereof
CN110716148A (en) * 2019-10-18 2020-01-21 兰州交通大学 Real-time safety monitoring system for composite power energy storage

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103683341A (en) * 2012-08-31 2014-03-26 中信国安盟固利动力科技有限公司 On-line two-way balancing device for energy storage system battery modules
CN103683341B (en) * 2012-08-31 2017-06-13 中信国安盟固利动力科技有限公司 A kind of on-line automatic bidirectional equalization device of energy storage system storage battery module
CN105210259A (en) * 2013-04-09 2015-12-30 Evtd株式会社 Balance correction apparatus and storage system
US9853461B2 (en) 2013-04-09 2017-12-26 Evtd Inc. Balance correction apparatus and electric storage system
CN105210259B (en) * 2013-04-09 2018-07-27 日商艾达司股份有限公司 Balance correction apparatus and accumulating system
CN103414224A (en) * 2013-08-14 2013-11-27 惠州市亿能电子有限公司 High-capacity high-voltage integrated battery pack system and control method thereof
CN103414224B (en) * 2013-08-14 2016-02-10 惠州市亿能电子有限公司 A kind of high-tension integrated battery group system of Large Copacity and control method thereof
CN104734236A (en) * 2013-12-19 2015-06-24 北汽福田汽车股份有限公司 Battery pack charging and discharging device and method
CN104734236B (en) * 2013-12-19 2018-01-19 北汽福田汽车股份有限公司 Battery set charge/discharge device and method
CN105470555A (en) * 2016-01-26 2016-04-06 宁波市北仑海伯精密机械制造有限公司 Power battery pack structure and management method thereof
CN105470555B (en) * 2016-01-26 2019-04-19 宁波市北仑海伯精密机械制造有限公司 A kind of power battery pack structure and its management method
CN110716148A (en) * 2019-10-18 2020-01-21 兰州交通大学 Real-time safety monitoring system for composite power energy storage

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Granted publication date: 20130403

Termination date: 20180831