CN109713775A - A kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies - Google Patents
A kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies Download PDFInfo
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- CN109713775A CN109713775A CN201910147064.7A CN201910147064A CN109713775A CN 109713775 A CN109713775 A CN 109713775A CN 201910147064 A CN201910147064 A CN 201910147064A CN 109713775 A CN109713775 A CN 109713775A
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- uninterruptible power
- lithium battery
- battery group
- management system
- power supply
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 60
- 238000004146 energy storage Methods 0.000 title claims abstract description 14
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
The invention proposes a kind of lithium battery group energy-storage systems comprising multiple uninterruptible power supplies, including multiple uninterruptible power supply UPS, battery management system BMS, lithium battery group and control circuit, the lithium battery group is in parallel with multiple uninterruptible power supply UPS respectively by battery management system BMS, and control circuit is equipped between the multiple uninterruptible power supply UPS and battery management system BMS；The control circuit includes the control unit of multiple parallel connections, one end of described control unit and a uninterruptible power supply UPS circuit connection, the other end accesses battery management system BMS, and the battery management system BMS makes lithium battery group charge or discharge by controlling control circuit.The present invention can multiple uninterruptible power supply UPS share a lithium battery group, be conducive to save the cost, and do not form circulation between UPS, be hardly damaged UPS device.
Description
Technical field
The present invention relates to power technique fields, and in particular to a kind of lithium battery group energy storage system comprising multiple uninterruptible power supplies
System.
Background technique
Powering off suddenly in the certain key equipments of the industries such as bank, hospital, army, electric system will cause heavy losses, because
This ensures that these key equipments have reliable and stable power supply to be just particularly important.Currently, uninterruptible power supply UPS and lithium electricity
These key equipments that are combined into pond provide guarantee；When there is city to be electrically accessed, UPS will be supplied to load to make after alternating current pressure stabilizing
With, and can charge simultaneously for lithium battery group；When commercial power interruption (forced outage), UPS can pass through the DC power supply of lithium battery
Inverter switching conversion square normal load continue supply 220V alternating current, make load maintain work normally and protect load it is soft,
Hardware is not damaged.
However, the outfit ratio of uninterruptible power supply UPS and lithium battery group is only 1:1 at present, this is because when it is multiple not
When uninterruptible power UPS parallel connection shares a lithium battery group, it will form circulation between multiple uninterruptible power supply UPS, cause in UPS
Device is easy breakdown damage；And lithium battery price is costly, when the outfit ratio of uninterruptible power supply UPS and lithium battery group is
When 1:1, it is unfavorable for save the cost.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of lithium battery group energy storage system comprising multiple uninterruptible power supplies
System, can multiple uninterruptible power supply UPS share a lithium battery group, be conducive to save the cost, and do not form circulation between UPS, no
UPS device easy to damage.
The technical scheme of the present invention is realized as follows: a kind of lithium battery group energy storage system comprising multiple uninterruptible power supplies
System, including multiple uninterruptible power supply UPS, battery management system BMS, lithium battery group and control circuit, the lithium battery group pass through
Battery management system BMS is in parallel with multiple uninterruptible power supply UPS respectively, the multiple uninterruptible power supply UPS and battery management system
Control circuit is equipped between system BMS；The control circuit includes the control unit of multiple parallel connections, one end of described control unit with
One uninterruptible power supply UPS circuit connection, the other end access battery management system BMS, and the battery management system BMS passes through control
Control circuit makes lithium battery group charge or discharge.
Optionally, described control unit includes in parallel discharge diode and charging diode, on the discharge diode
It is in series with an electric discharge relay, is in series with a charge relay on the charging diode；It the electric discharge relay and described fills
Electrical relay is controlled by the battery management system BMS.
Optionally, the anode of the discharge diode is connect with the cathode circuit of the lithium battery group, discharge diode
Cathode is connect with the cathode traces of uninterruptible power supply UPS；The anode of charging diode connects with the cathode traces of uninterruptible power supply UPS
It connects, the cathode of charging diode and the cathode circuit of lithium battery group connect.
Optionally, when having detected that city is electrically accessed, battery management system BMS disconnect electric discharge relay, closure charging after
Electric appliance, multiple uninterruptible power supply UPS charge to lithium battery group simultaneously；
When detecting that alternating current does not access, battery management system BMS closure electric discharge relay disconnects charge relay, lithium
Battery pack is discharged to multiple uninterruptible power supply UPS simultaneously.
Optionally, fuse is connected between the battery management system BMS and control circuit.
Compared with prior art, the invention has the following advantages that passing through battery management system present invention introduces control circuit
BMS controls the control unit in control circuit, can make simultaneously to fill lithium electronics group as multiple uninterruptible power supply UPS
It not will form circulation between multiple uninterruptible power supply UPS when electric, can also make when lithium battery group while to multiple uninterruptible power supply UPS
Circulation will not be formed between multiple uninterruptible power supply UPS when electric discharge；At this point, multiple uninterruptible power supply UPS can share a lithium
Battery pack has saved cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the system block diagram of the lithium battery group energy-storage system one embodiment of the present invention comprising multiple uninterruptible power supplies；
Fig. 2 is the circuit structure of the lithium battery group energy-storage system one embodiment of the present invention comprising multiple uninterruptible power supplies
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Refering to fig. 1 and Fig. 2, a kind of lithium battery group energy storage comprising multiple uninterruptible power supplies disclosed in embodiment of the present invention
System, including multiple uninterruptible power supply UPS, battery management system BMS, lithium battery group and control circuit, the lithium battery group are logical
It is in parallel with multiple uninterruptible power supply UPS respectively to cross battery management system BMS, the multiple uninterruptible power supply UPS and battery management
Control circuit is equipped between system BMS；The control circuit includes the control unit of multiple parallel connections, one end of described control unit
With a uninterruptible power supply UPS circuit connection, the other end accesses battery management system BMS, and battery management system BMS passes through control control
Circuit processed makes lithium battery group charge or discharge.Wherein, the access of battery management system BMS belongs to routine techniques.
When there is city to be electrically accessed, battery management system BMS is by each control unit in control control circuit to make
Multiple uninterruptible power supply UPS can power to lithium battery group simultaneously, and not will form circulation between multiple uninterruptible power supply UPS；
And when commercial power interruption (forced outage), battery management system BMS makes lithium by each control unit in control control circuit
Battery pack can power to multiple uninterruptible power supply UPS simultaneously, and not will form ring between multiple uninterruptible power supply UPS at this time
Stream.During lithium battery group charge or discharge, circulation not will form between multiple uninterruptible power supply UPS power supplies, therefore
UPS device will not be punctured；At this point, multiple uninterruptible power supply UPS can share a lithium battery group, cost has been saved.
Wherein, control unit includes discharge diode and charging diode in parallel, is in series with one on discharge diode and puts
Electrical relay is in series with a charge relay on charging diode；Electric discharge relay and charge relay pass through battery management system
The BMS that unites is controlled.
Specifically, the anode of discharge diode is connect with the cathode circuit of lithium battery group, the cathode of discharge diode and not
The cathode traces of uninterruptible power UPS connect；The anode of charging diode is connect with the cathode traces of uninterruptible power supply UPS, is charged
The cathode of diode and the cathode circuit of lithium battery group connect.
Specific control process are as follows:
(1) when having detected that city is electrically accessed, battery management system BMS disconnects electric discharge relay, closure charge relay,
Multiple uninterruptible power supply UPS charge to lithium battery group simultaneously at this time, anode charged two of the current direction from uninterruptible power supply UPS
Pole pipe flows to the anode of lithium battery group；
(2) when detecting that alternating current does not access, battery management system BMS closure electric discharge relay disconnects charge relay,
At this time lithium battery group simultaneously to multiple uninterruptible power supply UPS discharge, current direction from lithium battery group anode through discharge diode
The anode for flowing to uninterruptible power supply UPS is that load continues to supply 220V alternating current by uninterruptible power supply UPS, maintains load
It works normally and protects load soft and hardware not damaged.
In above-described embodiment, it is connected with fuse between battery management system BMS and control circuit, is led back for protecting
Road.
Fig. 2 specifically is seen, when detecting interior Zong Ya≤(outer stagnation pressure+0.3V), wherein interior voltage is lithium battery group
Both end voltage (being also the voltage at M in Fig. 2), the both end voltage that outer total voltage is uninterruptible power supply UPS (also for N in Fig. 2 at
Voltage), it was demonstrated that alternating current does not access at this time, then battery management system BMS disconnect all electric discharge relays and be closed it is all charge after
Electric appliance, that is, disconnect electric discharge relay K1-1, electric discharge relay K2-1 ..., electric discharge relay KN-1, be closed charge relay K1-
2, charge relay K2-2 ..., charge relay KN-2, at this time uninterruptible power supply UPS 1, UPS 2 ..., UPS N is simultaneously to lithium
Battery pack charging, current direction are as follows: P+- > charging diode -> charging is after K (1-N) -2- > B+；Due to depositing for charging diode
, electric current can only one-way flow, make uninterruptible power UPS 1, UPS 2 ..., not will form circulation between UPS N.
When detect (when interior stagnation pressure+0.3V)≤outer stagnation pressure+0.3V, wherein interior voltage be lithium battery group both end voltage
(being also the voltage at M in Fig. 2), the both end voltage that outer total voltage is uninterruptible power supply UPS (being also the voltage at N in Fig. 2), card
Bright alternating current at this time has accessed, then battery management system BMS is closed all electric discharge relays and disconnects all charge relays, i.e.,
Closure electric discharge relay K1-1, electric discharge relay K2-1 ..., electric discharge relay KN-1, disconnect charge relay K1-2, charging after
Electric appliance K2-2 ..., charge relay KN-2, at this time lithium battery group simultaneously to uninterruptible power supply UPS 1, UPS 2 ..., UPS N puts
Electricity, current direction are as follows: B+- > discharge diode -> electric discharge is after K (1-N) -1- > P+.Due to the presence of discharge diode, electric current
Can only one-way flow, make uninterruptible power UPS 1, UPS 2 ..., circulation will not be formed between UPS N.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies, which is characterized in that including multiple uninterruptible power supplies
UPS, battery management system BMS, lithium battery group and control circuit, the lithium battery group by battery management system BMS respectively with
Multiple uninterruptible power supply UPS are in parallel, and control circuit is equipped between the multiple uninterruptible power supply UPS and battery management system BMS；
The control circuit includes the control unit of multiple parallel connections, and one end of described control unit and a uninterruptible power supply UPS circuit connect
It connects, the other end accesses battery management system BMS, and the battery management system BMS fills lithium battery group by controlling control circuit
Electricity or electric discharge.
2. as described in claim 1 including the lithium battery group energy-storage system of multiple uninterruptible power supplies, which is characterized in that the control
Unit includes discharge diode and charging diode in parallel, is in series with an electric discharge relay on the discharge diode, described
A charge relay is in series on charging diode；The electric discharge relay and the charge relay pass through the battery management
System BMS control.
3. as claimed in claim 2 including the lithium battery group energy-storage system of multiple uninterruptible power supplies, which is characterized in that the electric discharge
The anode of diode is connect with the cathode circuit of the lithium battery group, the cathode of discharge diode and bearing for uninterruptible power supply UPS
Polar circuit connection；The anode of charging diode is connect with the cathode traces of uninterruptible power supply UPS, the cathode and lithium of charging diode
The cathode circuit of battery pack connects.
4. as claimed in claim 3 including the lithium battery group energy-storage system of multiple uninterruptible power supplies, which is characterized in that
When having detected that city is electrically accessed, battery management system BMS disconnect electric discharge relay, closure charge relay, it is multiple not
Uninterruptible power UPS charges to lithium battery group simultaneously；
When detecting that alternating current does not access, battery management system BMS closure electric discharge relay disconnects charge relay, lithium battery
Group is discharged to multiple uninterruptible power supply UPS simultaneously.
5. including the lithium battery group energy-storage system of multiple uninterruptible power supplies as described in Claims 1 to 4 is any, which is characterized in that
Fuse is connected between the battery management system BMS and control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147064.7A CN109713775A (en) | 2019-02-27 | 2019-02-27 | A kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147064.7A CN109713775A (en) | 2019-02-27 | 2019-02-27 | A kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies |
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| CN109713775A true CN109713775A (en) | 2019-05-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786451A (en) * | 2020-06-22 | 2020-10-16 | 深圳科士达科技股份有限公司 | Multi-path power supply system for battery management system |
| CN111799883A (en) * | 2020-06-22 | 2020-10-20 | 深圳科士达科技股份有限公司 | Lithium battery power supply system for supplying power to series connection hot backup uninterrupted power supply |
| CN113030746A (en) * | 2019-12-25 | 2021-06-25 | 应急管理部化学品登记中心 | Lithium battery danger testing system |
| CN113162213A (en) * | 2021-03-05 | 2021-07-23 | 阳光电源股份有限公司 | Uninterrupted power source and energy storage system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113030746A (en) * | 2019-12-25 | 2021-06-25 | 应急管理部化学品登记中心 | Lithium battery danger testing system |
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| CN111799883A (en) * | 2020-06-22 | 2020-10-20 | 深圳科士达科技股份有限公司 | Lithium battery power supply system for supplying power to series connection hot backup uninterrupted power supply |
| CN111799883B (en) * | 2020-06-22 | 2024-01-30 | 深圳科士达科技股份有限公司 | Lithium battery power supply system for supplying power to serial hot standby uninterruptible power supply |
| CN113162213A (en) * | 2021-03-05 | 2021-07-23 | 阳光电源股份有限公司 | Uninterrupted power source and energy storage system |
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