CN109066829A - A kind of battery group open-circuit fault recombination discharge system and battery - Google Patents
A kind of battery group open-circuit fault recombination discharge system and battery Download PDFInfo
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- CN109066829A CN109066829A CN201810739855.4A CN201810739855A CN109066829A CN 109066829 A CN109066829 A CN 109066829A CN 201810739855 A CN201810739855 A CN 201810739855A CN 109066829 A CN109066829 A CN 109066829A
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- battery
- module
- packet
- electric discharge
- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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Abstract
The present invention relates to power technique fields, especially a kind of battery group open-circuit fault recombination discharge system and battery, including battery packet and at least two DC/DC modules, one end of each DC/DC module is for connecting a battery packet, for the other end for connecting load bus, DC/DC wired in parallel is powered load bus；When electric power storage tank discharge, if there is single battery open circuit, the then corresponding DC/DC module conducting of without failure battery packet, and it is flowed with DC/DC wired in parallel and load bus is powered, it can be uninterruptedly powered after single battery open-circuit fault when realizing the power supply of battery group, and solve the problems, such as that existing discharge current channel directly passes through each single battery of corresponding by-path turn-on when single battery open-circuit fault in solving battery and causes voltage stability lower.
Description
Technical field
The present invention relates to power technique fields, especially a kind of battery group open-circuit fault recombination discharge system and electric power storage
Pond.
Background technique
Battery group for fields such as the DC power systems such as electric power, communication, energy storage substation and electric cars is all
Series operation, with the influence of the environment such as the continuous lengthening of battery runing time and temperature, humidity, in battery group
The performance of each cell batteries also constantly changes, wherein will lead to, part accumulator internal resistance increases, capacity declines or other events
Barrier, at the time of needing direct current system to provide power supply to load, since open-circuit fault occurs for a section or a few section cell batteries
When, which cannot provide operating current, and entire battery pack is made to lose the effect of application.In recent years, electric power DC power supply
System is frequently resulted in protection control equipment tripping, is repeatedly caused large-area power-cuts thing due to above-mentioned battery pack open circuit failure
Therefore seriously threaten the safe and stable operation of electric system.
Currently, mainly having to the operation maintenance management of series-connected batteries: by measure the end voltage of battery, internal resistance,
The parameters such as temperature simultaneously analyze and determine, detect and fall behind fail battery；Periodically battery group core is held, it is desirable that battery group discharge capacity
Not less than 80% rated capacity etc..However, above-mentioned maintenance work despite the use of, but still has and cannot find to open a way in time
Fail battery, and when there is individual battery pack open circuits, battery group can not be made to continue as load in time, operating current is provided
Problem then substantially reduces the stability and reliability of system operation in this way.
There is Chinese patent publication No. for the patent document of CN106230044A to disclose one kind and can provide for open-circuit cell to put
The battery pack structure and its implementation of electrical circuit, use each single battery to be parallel with for providing for open-circuit cell
The freewheeling diode in discharge current channel can be effectively prevented from the failures such as relay fail because of caused by battery pack open circuit failure,
But there are the current capacity of freewheeling diode, short-circuit impact, be installed in parallel and the problems such as installation number.Existing DC power supply
220V system generally uses 108 batteries, needs 108 freewheeling diodes according to the method；The capacitive of DC load is impacted
Electric current A up to a hundred and certain time, there may be impact failures for freewheeling diode；Meanwhile the complexity of system is increased,
Increased freewheeling diode is more, reduces the stability of system.
Summary of the invention
The object of the present invention is to provide a kind of battery group open-circuit fault recombination discharge system and batteries, existing to solve
There is discharge current channel directly to pass through each monomer electricity of corresponding by-path turn-on when single battery open-circuit fault in solving battery
The problem that pond causes voltage stability lower.
In order to can continue to carry out electric discharge power supply after single battery open-circuit fault when realizing the power supply of battery group, pass through DC/
DC realizes voltage control when failure power supply, solves existing discharge current channel single battery open-circuit fault in solving battery
When directly cause voltage stability lower by each single battery of corresponding by-path turn-on problem, the present invention provides a kind of electric power storage
Pond group open-circuit fault recombination discharge system, including control module and at least two DC/DC modules, the one of each DC/DC module
End is for connecting the battery packet being made of at least one single battery, and the other end of each DC/DC module is for connecting
Load bus is connect, the concatenated at least two batteries packet load bus in parallel is powered；The input of the control module
Hold the fault message for detecting each battery packet, when detecting the presence of battery packet failure, control module control with
The corresponding DC/DC module conducting of without failure battery packet, and with the voltage value of the sum of concatenated each battery packet voltage
Load bus is powered.
Further, for the ease of managing and controlling, to each DC/DC independent control of discharging, the control module packet
DC/DC control unit identical with DC/DC number of modules is included, the output end of each DC/DC control unit connects a DC/DC
Module.
Further, in order to realize the power supply of DC/DC control unit, each DC/DC module includes electric discharge DC/DC, each
For a battery packet by an electric discharge DC/DC for connecting load bus, the output end of each DC/DC control unit connects one
A electric discharge DC/DC；Each DC/DC module further includes electric discharge DC/DC accessory power supply, the electricity of each electric discharge DC/DC accessory power supply
By rectifier filter for connecting AC power source, the current output terminal of each electric discharge DC/DC accessory power supply connects stream input terminal
Connect corresponding DC/DC control unit.
Further, in order to be powered in Alternating Current Power Supply exception to control unit, each electric discharge DC/DC auxiliary electricity
The current input terminal in source connects the backward end of a diode, and the forward end of diode is for connecting corresponding battery packet just
Cathode.
In order to guarantee the continued power of battery in safety device, the existing battery being made of multiple single batteries is avoided
It not can guarantee when a single battery breaks down wherein and continue to power, the present invention provides a kind of battery, including concatenated
At least two battery packets are powered for shunt load bus, each battery Bao Jun includes at least one monomer electricity
Pond, each battery packet are correspondingly connected with a DC/DC module, and the DC/DC module is for connecting load bus；It further include control
Molding block, the input terminal of the control module are used to detect the fault message of each battery packet, when detecting the presence of battery packet
When failure, the control module controls DC/DC module conducting corresponding with without failure battery packet, and with concatenated each
The voltage value of the sum of battery packet voltage is powered load bus.
Further, managing and controlling for the ease of battery and its interior battery pack, the control module include and DC/
The output end of the identical DC/DC control unit of DC number of modules, each DC/DC control unit connects a DC/DC module.
Further, for the ease of the connection of battery and integrally disposed, a DC/DC control unit is set to a storage
In battery pack.
Further, in order to realize the power supply of the DC/DC control unit to battery pack each in battery, each DC/DC mould
Block includes electric discharge DC/DC, each battery packet is used to connect load bus by an electric discharge DC/DC, each DC/DC
The output end of control unit connects an electric discharge DC/DC；Each DC/DC module further includes electric discharge DC/DC accessory power supply, each
For the current input terminal of electric discharge DC/DC accessory power supply by rectifier filter for connecting AC power source, each electric discharge DC/DC is auxiliary
The current output terminal of power supply is helped to connect corresponding DC/DC control unit.
Further, in order to be powered in AC power source abnormal electrical power supply to control unit, each electric discharge DC/DC is auxiliary
The current input terminal of power supply is helped to connect the backward end of a diode, the forward end of diode is connecting corresponding battery packet just
Cathode.
Detailed description of the invention
Fig. 1 is a kind of composition schematic diagram of battery group open-circuit fault recombination discharge system；
Fig. 2 is the connection schematic diagram of DC/DC inside modules in a kind of battery group open-circuit fault recombination discharge system；
Fig. 3 is a kind of battery group open-circuit fault recombination discharge system normal condition power supply the principle figure；
Fig. 4 is a kind of battery group open-circuit fault recombination any battery cell failure state power supply the principle figure of discharge system.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
The present invention provides a kind of battery group open-circuit fault recombination discharge system, including control module and at least two DC/
DC module 1, as shown in Figure 1, one end of each DC/DC module connects battery packet 3, and the connection of its other end is for load
The load bus (KM+, KM-) of power supply.Load bus is powered by concatenated at least two batteries packet under normal circumstances,
In be provided at least one single battery 2 in a battery packet, and under normal circumstances, DC/DC module is to be off not passing
Pass the warm standby state of energy.
As shown in Fig. 2, it is preferred that each DC/DC module, which passes through an electric discharge DC/DC, realizes corresponding battery packet
Electric discharge；One end of each electric discharge DC/DC is for connecting a battery packet, the other end of each electric discharge DC/DC is for connecting
Connect load bus.
The input terminal of control module is used to detect the fault message of each battery packet, when detecting the presence of battery packet failure
When, control module controls DC/DC module conducting corresponding with without failure battery packet, and with concatenated each battery packet
The voltage value of the sum of voltage is powered load bus.
Control module can control the electric discharge DC/DC in all DC/DC modules using unified controller, and
And the power supply of this control module can also be supplied to be powered by external AC power source by battery packet
Electricity, control module can also be the module being made of the DC/DC control unit of corresponding DC/DC number of modules, each DC/DC control
The output end of unit processed connects an electric discharge DC/DC, and communication connection between each DC/DC control unit carries out mutual information
It obtains.
As shown in Fig. 2, the power supply in order to realize DC/DC control unit, each DC/DC module further includes electric discharge DC/DC auxiliary
Help power supply, each electric discharge DC/DC accessory power supply current input terminal by rectifier filter for connect AC power source (L1,
N1), the current output terminal of each electric discharge DC/DC accessory power supply connects corresponding DC/DC control unit, above-mentioned rectifier filter
For uncontrollable rectifier filter.In addition, in order to be powered in AC power source abnormal electrical power supply to control unit, each electric discharge
The current input terminal of DC/DC accessory power supply connects the backward end of a diode, and the forward end of diode connects corresponding electric power storage
The positive and negative anodes of Chi Bao.Voltage of the L1 and N1 after uncontrollable rectifying and wave-filtering is always above the voltage of battery packet, under normal circumstances,
Electric discharge DC/DC is in warm back-up, and accessory power supply is by Alternating Current Power Supply；When exchanging power loss, if there is no monomer electricity for battery packet
Pond open-circuit fault, then battery group is powered to load bus, and electric discharge DC/DC accessory power supply is provided by battery packet, and discharge DC/DC
In warm back-up；When exchanging power loss, if there are single battery open-circuit fault, batteries without failure at this time for battery group
Corresponding electric discharge DC/DC conducting is wrapped, electric discharge DC/DC accessory power supply is provided by battery packet.
The present invention also provides a kind of batteries, and according to above-mentioned structure, which includes concatenated at least two electric power storage
Chi Bao is powered for shunt load bus, each battery Bao Jun includes at least one single battery, each electric power storage
Chi Bao is correspondingly connected with a DC/DC module, and DC/DC module is for connecting load bus；In addition, the battery further includes control mould
Block, the control module can be realized the function of the control module in above-mentioned discharge system.It is preferred that control module includes and DC/DC mould
The output end of the identical DC/DC control unit of block number, each DC/DC control unit connects a DC/DC module.
One DC/DC control unit is set in a battery packet.And it is also set up in a battery packet of battery
There are electric discharge DC/DC and electric discharge DC/DC accessory power supply, the current input terminal for the DC/DC accessory power supply that discharges is used by rectifier filter
Corresponding DC/DC control unit is connected in the current output terminal of connection AC power source, electric discharge DC/DC accessory power supply, discharge DC/DC
The current input terminal of accessory power supply is also connected with the backward end of a diode, and the forward end of diode connects corresponding battery packet
Positive and negative anodes.
In battery operation, the battery packet where one of DC/DC control unit detects it exists
I.e. there are the DC/DC control unit for when single battery open-circuit fault, not occurring the battery packet of open-circuit fault controls to correspond to for failure
Electric discharge DC/DC conducting.
Power supply the principle is as follows:
Battery group provides the schematic illustration in discharge current channel when being illustrated in figure 3 normal, during discharge, single
Body battery is because the reasons such as off-capacity, internal resistance increase cause its own that open-circuit fault occurs, then battery when entering open-circuit fault
Group provides discharge current channel, as shown in Figure 4.It is described by taking Fig. 4 as an example, during the electric discharge of battery group, (n-1) #
Battery packet in single battery open-circuit fault occurs, then battery starts to start in the form of battery packet to provide work for load
Make electric current, the battery packet of only (n-1) # does not work, and issues alarm signal；If the battery Bao Weilian of open-circuit fault occurs
DC/DC module is connect, then all battery packets for having connected DC/DC module all start to provide operating current for load.
By control module also or each control unit control DC/DC module realize voltage adjustment so that each
The voltage value of the supply voltage of DC/DC module can be with the electricity of each battery packet of setting shunt load bus under normal circumstances
The sum of pressure is consistent, with the stability of proof load busbar voltage.
Meanwhile when single battery generation open-circuit fault, the battery packet not comprising this single battery can be incessantly
It continues as load and operating current is provided, can effectively avoid the accidents such as relay fail caused by battery pack open circuit failure, system is provided
The reliability and stability of work.
Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.
Under the thinking that the present invention provides, to the skill in above-described embodiment by the way of being readily apparent that those skilled in the art
Art means are converted, are replaced, are modified, and play the role of with the present invention in relevant art means it is essentially identical, realize
Goal of the invention it is also essentially identical, the technical solution formed in this way is to be finely adjusted to be formed to above-described embodiment, this technology
Scheme is still fallen in protection scope of the present invention.
Claims (9)
1. a kind of battery group open-circuit fault recombinates discharge system, which is characterized in that including control module and at least two DC/DC
Module, one end of each DC/DC module are used to connect the battery packet being made of at least one single battery, each
The other end of DC/DC module is carried out for connecting load bus, the concatenated at least two batteries packet load bus in parallel
Power supply；The input terminal of the control module is used to detect the fault message of each battery packet, former when detecting the presence of battery packet
When barrier, the control module controls DC/DC module conducting corresponding with without failure battery packet, and with concatenated each storage
The voltage value of the sum of battery pack voltage is powered load bus.
2. battery group open-circuit fault according to claim 1 recombinates discharge system, which is characterized in that the control module
Including DC/DC control unit identical with DC/DC number of modules, the output end of each DC/DC control unit connects a DC/
DC module.
3. battery group open-circuit fault according to claim 2 recombinates discharge system, which is characterized in that each DC/DC module
It include electric discharge DC/DC, each battery packet by an electric discharge DC/DC for connecting load bus, control by each DC/DC
The output end of unit processed connects an electric discharge DC/DC；Each DC/DC module further includes electric discharge DC/DC accessory power supply, each is put
By rectifier filter for connecting AC power source, each electric discharge DC/DC is assisted the current input terminal of electric DC/DC accessory power supply
The current output terminal of power supply connects corresponding DC/DC control unit.
4. battery group open-circuit fault according to claim 3 recombinates discharge system, which is characterized in that each electric discharge
The current input terminal of DC/DC accessory power supply connects the backward end of a diode, and the forward end of diode is corresponding for connecting
The positive and negative anodes of battery packet.
5. a kind of battery, including concatenated at least two batteries packet are powered for shunt load bus, each storage
Battery pack includes at least one single battery, which is characterized in that and each battery packet is correspondingly connected with a DC/DC module,
The DC/DC module is for connecting load bus；It further include control module, the input terminal of the control module is for detecting each storage
The fault message of battery pack, when detecting the presence of battery packet failure, the control module control and without failure storage
The corresponding DC/DC module conducting of battery pack, and load bus is carried out with the voltage value of the sum of concatenated each battery packet voltage
Power supply.
6. battery according to claim 5, which is characterized in that the control module includes and DC/DC number of modules phase
The output end of same DC/DC control unit, each DC/DC control unit connects a DC/DC module.
7. battery according to claim 6, which is characterized in that a DC/DC control unit is set to a battery
In packet.
8. battery according to claim 6 or 7, which is characterized in that each DC/DC module includes electric discharge DC/DC, each
For a battery packet by an electric discharge DC/DC for connecting load bus, the output end of each DC/DC control unit connects one
A electric discharge DC/DC；Each DC/DC module further includes electric discharge DC/DC accessory power supply, the electricity of each electric discharge DC/DC accessory power supply
By rectifier filter for connecting AC power source, the current output terminal of each electric discharge DC/DC accessory power supply connects stream input terminal
Connect corresponding DC/DC control unit.
9. battery according to claim 8, which is characterized in that the electric current input of each electric discharge DC/DC accessory power supply
The backward end of one diode of end connection, the forward end of diode connect the positive and negative anodes of corresponding battery packet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810739855.4A CN109066829A (en) | 2018-07-06 | 2018-07-06 | A kind of battery group open-circuit fault recombination discharge system and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810739855.4A CN109066829A (en) | 2018-07-06 | 2018-07-06 | A kind of battery group open-circuit fault recombination discharge system and battery |
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| Publication Number | Publication Date |
|---|---|
| CN109066829A true CN109066829A (en) | 2018-12-21 |
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| CN201810739855.4A Pending CN109066829A (en) | 2018-07-06 | 2018-07-06 | A kind of battery group open-circuit fault recombination discharge system and battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814039A (en) * | 2019-01-10 | 2019-05-28 | 中国移动通信集团海南有限公司 | A kind of battery group open circuit detection method, device and computer readable storage medium |
| CN110571909A (en) * | 2019-09-27 | 2019-12-13 | 国网重庆市电力公司璧山供电分公司 | open circuit protection mechanism for storage battery |
| CN110729809A (en) * | 2019-09-24 | 2020-01-24 | 智洋创新科技股份有限公司 | Direct-current power supply bus voltage loss automatic cross-over compensation system and method |
| CN111816938A (en) * | 2020-07-06 | 2020-10-23 | 安徽恒明工程技术有限公司 | Gradient utilization method for retired battery |
| CN111864889A (en) * | 2020-07-24 | 2020-10-30 | 朱年丰 | Uninterrupted emergency power supply system and method for open-circuit protection of lead-acid storage battery pack |
| CN112216849A (en) * | 2020-11-27 | 2021-01-12 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | DC/DC converter current control system and method for hydrogen fuel cell system |
| CN113572183A (en) * | 2021-07-20 | 2021-10-29 | 许继电源有限公司 | Intelligent maintenance circuit and maintenance method for station storage battery |
| WO2023124502A1 (en) * | 2021-12-30 | 2023-07-06 | 华为数字能源技术有限公司 | Energy storage system and control method for energy storage system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082446U (en) * | 1990-11-17 | 1991-08-07 | 朱培立 | Self-conversion direct-alternating current two purpose warning device |
| CN202798115U (en) * | 2012-06-25 | 2013-03-13 | 广东东研网络科技股份有限公司 | Automatic switching control circuit of alternating current power supply and direct current battery backup power supply |
| CN106230044A (en) * | 2016-07-28 | 2016-12-14 | 广州市仟顺电子设备有限公司 | Can be battery pack structure and its implementation of open-circuit cell offer discharge loop |
| CN108155707A (en) * | 2018-02-01 | 2018-06-12 | 深圳奥特迅电力设备股份有限公司 | A kind of DC bus powered system and its control method |
-
2018
- 2018-07-06 CN CN201810739855.4A patent/CN109066829A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082446U (en) * | 1990-11-17 | 1991-08-07 | 朱培立 | Self-conversion direct-alternating current two purpose warning device |
| CN202798115U (en) * | 2012-06-25 | 2013-03-13 | 广东东研网络科技股份有限公司 | Automatic switching control circuit of alternating current power supply and direct current battery backup power supply |
| CN106230044A (en) * | 2016-07-28 | 2016-12-14 | 广州市仟顺电子设备有限公司 | Can be battery pack structure and its implementation of open-circuit cell offer discharge loop |
| CN108155707A (en) * | 2018-02-01 | 2018-06-12 | 深圳奥特迅电力设备股份有限公司 | A kind of DC bus powered system and its control method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814039A (en) * | 2019-01-10 | 2019-05-28 | 中国移动通信集团海南有限公司 | A kind of battery group open circuit detection method, device and computer readable storage medium |
| CN109814039B (en) * | 2019-01-10 | 2022-09-09 | 中国移动通信集团海南有限公司 | Storage battery pack open circuit detection method and device and computer readable storage medium |
| CN110729809A (en) * | 2019-09-24 | 2020-01-24 | 智洋创新科技股份有限公司 | Direct-current power supply bus voltage loss automatic cross-over compensation system and method |
| CN110571909A (en) * | 2019-09-27 | 2019-12-13 | 国网重庆市电力公司璧山供电分公司 | open circuit protection mechanism for storage battery |
| CN111816938A (en) * | 2020-07-06 | 2020-10-23 | 安徽恒明工程技术有限公司 | Gradient utilization method for retired battery |
| CN111864889A (en) * | 2020-07-24 | 2020-10-30 | 朱年丰 | Uninterrupted emergency power supply system and method for open-circuit protection of lead-acid storage battery pack |
| CN111864889B (en) * | 2020-07-24 | 2024-02-20 | 朱年丰 | Uninterrupted emergency power supply system and power supply method for open-circuit protection of lead-acid storage battery pack |
| CN112216849A (en) * | 2020-11-27 | 2021-01-12 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | DC/DC converter current control system and method for hydrogen fuel cell system |
| CN113572183A (en) * | 2021-07-20 | 2021-10-29 | 许继电源有限公司 | Intelligent maintenance circuit and maintenance method for station storage battery |
| WO2023124502A1 (en) * | 2021-12-30 | 2023-07-06 | 华为数字能源技术有限公司 | Energy storage system and control method for energy storage system |
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Application publication date: 20181221 |