CN109245274B - Emergency battery device of transformer substation for fast access direct current system - Google Patents
Emergency battery device of transformer substation for fast access direct current system Download PDFInfo
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- CN109245274B CN109245274B CN201811070294.XA CN201811070294A CN109245274B CN 109245274 B CN109245274 B CN 109245274B CN 201811070294 A CN201811070294 A CN 201811070294A CN 109245274 B CN109245274 B CN 109245274B
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims abstract description 97
- 239000000178 monomer Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 2
- 230000026676 system process Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 4
- 101000717417 Arabidopsis thaliana Cysteine proteinase RD21A Proteins 0.000 description 3
- 101100523939 Arabidopsis thaliana RD22 gene Proteins 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 206010014357 Electric shock Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 1
Classifications
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a transformer substation battery device which is quickly connected into a direct current system, comprising: four first battery modules, the first battery module outputs 24V direct current voltage; a second battery module outputting a 12V dc voltage; the direct current output ends of the four first battery modules and the second battery modules are connected in series and then connected with a 110V direct current bus; the first battery module comprises eight groups of lithium iron phosphate battery packs, and the eight groups of lithium iron phosphate battery packs are sequentially connected in series and then connected with the output end of the first battery module to output 24V direct current voltage; the second battery module comprises four groups of lithium iron phosphate battery packs, and the four groups of lithium iron phosphate battery packs are sequentially connected in series and then connected with the output end of the second battery module to output 12V direct current voltage. The device operation system process is simple and fast, has avoided the battery short circuit that traditional transport and installation mode caused, the risk of opening a way, has ensured the reliable operation of transformer substation's reserve energy.
Description
Technical Field
The invention relates to the field of emergency power supply of substations, in particular to a substation emergency battery device capable of being quickly connected into a direct current system.
Background
The importance of the accumulator as the sole reserve energy source for the substation is self-evident. When the transformer substation storage battery has the open circuit condition, will not provide direct current voltage output, need operation maintenance personnel to throw into emergency storage battery with the trouble storage battery operation this moment, traditional mode for operation maintenance personnel carry emergency storage battery to the transformer substation, establish ties into whole group with throw into operation, this mode has following drawback:
On the one hand, the weight of the lead-acid storage battery monomer is 25-30kg, and an operation and maintenance person generally needs to carry 54 or 108 storage battery monomers to a transformer substation and then connect the storage battery monomers in series into a whole group to put into operation. This process is time consuming and labor intensive, often requiring 6-8 people to complete the process of handling, installing, accessing the system to complete the commissioning, which takes more than 1 hour. In the process of incomplete operation of the emergency storage battery pack, the direct current system of the transformer substation is extremely easy to fall into a bus risk state due to the fact that an emergency power supply is not obtained.
On the other hand, in the carrying process, the contact between the storage battery monomers easily causes short circuit of the batteries, and the risks of fire disaster, personal burn and the like of the batteries are directly caused.
Finally, in the installation process, 54 or 108 batteries are connected in series to put into operation, the connection sequence of the batteries, the connection of the positive electrode and the negative electrode of the cable are correct, and the installation fastening degree of the battery connecting strip all put forward certain requirements on the skill level of operation and maintenance personnel, and once the operation is wrong, the short circuit, the open circuit and even the personal burn of the batteries are easily caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a transformer substation battery device which is quickly connected into a direct current system, wherein the battery device adopts a lithium iron phosphate battery, can stably output 110V direct current voltage, can be quickly connected into the transformer substation direct current power supply system, and is convenient and quick.
In order to solve the above technical problems, the present invention provides a substation battery device for fast accessing a dc system, including:
Four first battery modules outputting 24V direct current voltage;
a second battery module outputting a 12V dc voltage;
the direct current output ends of the 5 battery modules are connected in series and then connected with a 110V direct current bus; wherein,
The first battery module comprises eight groups of lithium iron phosphate battery packs, wherein the eight groups of lithium iron phosphate battery packs are sequentially connected in series and then connected with the direct current output end of the first battery module to output 24V direct current voltage;
the second battery module comprises four groups of lithium iron phosphate battery packs, and the four groups of lithium iron phosphate battery packs are sequentially connected in series and then connected with the direct current output end of the second battery module to output 12V direct current voltage.
The first battery module further comprises a first circuit breaker, and the eight groups of lithium iron phosphate battery packs are connected in series and then connected with the direct current output end of the first battery module through the first circuit breaker.
The lithium iron phosphate battery pack at least comprises two monomer lithium iron phosphate batteries which are connected in parallel, and the rated output voltage of the monomer lithium iron phosphate batteries is 3V.
The first battery module further comprises a first DC/AC converter, a second circuit breaker, a third circuit breaker and a first alternating current output socket, wherein the first DC/AC converter is used for converting direct current 24V voltage into 220V alternating current voltage; wherein the method comprises the steps of
The positive output ends of the eight groups of lithium iron phosphate battery packs after being connected in series are connected with the positive input end of the first DC/AC converter through the second circuit breaker, the negative output ends of the eight groups of lithium iron phosphate battery packs are connected with the negative input end of the first DC/AC converter through the third circuit breaker, and the output end of the first DC/AC converter is connected with the first alternating current output socket.
Wherein the first battery module further comprises a first current transformer, a first battery management unit, a plurality of fourth breakers, a first switch, a DC/DC converter for converting 24V DC voltage into 12V DC voltage,
The eight groups of lithium iron phosphate battery packs are connected in series and then connected with the first current transformer, the first current transformer transmits the battery current value to the first battery management unit through a cable,
The eight lithium iron phosphate battery packs are connected in series and then connected with the input end of the DC/DC converter through the first switch, the output end of the DC/DC converter is connected with the direct current input end of the first battery management unit,
Each group of lithium iron phosphate batteries is also connected with the first battery management unit through a fourth circuit breaker corresponding to the lithium iron phosphate batteries.
The first battery module further comprises a first controllable switch, the output end of the first DC/AC converter is connected with the first alternating current socket through the first controllable switch, and the control end of the controllable switch is connected with the first battery management unit.
The second battery module further comprises a fifth circuit breaker, and the four groups of lithium iron phosphate battery packs are connected in series and then connected with the direct current output end of the second battery module through the fifth circuit breaker.
Wherein the second battery module comprises a second DC/AC converter, a sixth breaker, a seventh breaker and a second AC output socket, the second DC/AC converter is used for converting 12V DC voltage into 220V AC voltage,
After the four groups of lithium iron phosphate battery packs are connected in series, the positive electrode of the four groups of lithium iron phosphate battery packs is connected with the positive electrode input end of the second DC/AC converter through the sixth circuit breaker, the negative electrode of the four groups of lithium iron phosphate battery packs is connected with the negative electrode input end of the second DC/AC converter through the seventh circuit breaker, and the output end of the second DC/AC converter is connected with the second alternating current output socket.
Wherein the second battery module further comprises a second current transformer, a second battery management unit and a plurality of eighth circuit breakers,
The four groups of lithium iron phosphate battery packs are connected in series and then connected with the second current transformer, the second current transformer transmits the battery current value to the second battery management unit through a cable,
Each group of lithium iron phosphate batteries is also connected with a second battery management unit through an eighth circuit breaker corresponding to the lithium iron phosphate batteries,
The input end of the second DC/AC converter is connected with the direct current input end of the second battery management unit through a second switch.
The second battery module further comprises a second controllable switch, the output end of the second DC/AC converter is connected with the second alternating current output socket through the second controllable switch, and the control end of the controllable switch is connected with the second battery management unit.
According to the transformer substation battery device with the rapid access to the direct current system, 2 single lithium iron phosphate batteries are adopted in the first battery module and the second battery module to be connected in parallel to form a battery pack, the first battery module can output 24V direct current voltage, the 4 first battery modules and the second battery module are connected in series to output 110V direct current voltage, the output voltage is used for connecting the direct current 110V output voltage into the transformer substation direct current system through a large current output plug-in unit, the transformer substation direct current system can be used as an emergency power supply to ensure normal and stable output of a direct current system bus, and the risk of voltage loss of the transformer substation direct current bus is avoided; in addition, the first battery module and the second battery module can both output 220V alternating voltage, the device can meet the emergency power consumption requirement of most of transformer substation direct current systems, the device can be connected into the system within 5 minutes after being carried or installed by only 2 persons, the risk of short circuit and open circuit of the batteries can be avoided, the process of the achievement commissioning system is simple and quick, the risk of short circuit and open circuit of the batteries, which is easily caused by the traditional carrying and installing modes, is avoided, the bus voltage loss and personal electric shock risk of the direct current systems, which are caused by the conventional carrying and installing modes, are avoided, and the reliable operation of the reserve energy of the transformer substation is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a substation battery device with a fast access to a dc system according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a first battery module of a substation battery device that is quickly connected to a dc system according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a second battery module of a substation battery device that is quickly connected to a dc system according to an embodiment of the present invention.
Detailed Description
The following description of embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, the present invention provides a transformer substation emergency battery device for fast access to a dc system, including:
four first battery modules 1, which output 24V direct current voltage,
A second battery module 2 outputting 12V DC voltage, the above 5 electric power
The direct current output ends of the pool modules are connected in series and then connected with a 110V direct current bus; wherein,
The first battery module comprises eight groups of lithium iron phosphate battery packs, wherein the eight groups of lithium iron phosphate battery packs are connected in series and then connected with the output end of the first battery module to output 24V direct current voltage;
the second battery module comprises four groups of lithium iron phosphate battery packs, and the four groups of lithium iron phosphate battery packs are connected in series and then connected with the output end of the second battery module to output 12V direct current voltage.
Specifically, compared with the traditional lead-acid storage battery, the lithium iron phosphate battery has the energy ratio of 4-5 times that of the lead-acid storage battery, has the advantages of small volume and light weight, and is suitable for high-current charge and discharge.
Specifically, the first battery module and the first battery module, and the dc output ends of the first battery module and the second battery module are all connected in series through a flexible cable of 75mm 2, and then connected to a high-current input plug-in unit, which can meet the requirement of high-current (0-250A) input to charge all battery packs.
Specifically, in order to improve the reliability of the battery packs, each of the lithium iron phosphate battery packs includes two lithium iron phosphate single batteries connected in parallel with each other, the lithium iron phosphate single batteries having a rated capacity of 250Ah and a rated voltage of DC3V, as shown in fig. 2, eight lithium iron phosphate single batteries are respectively a first lithium iron phosphate single battery formed by connecting the single batteries 01 and 11 in parallel, a second lithium iron phosphate single battery formed by connecting the single batteries 02 and 12, and third to eight lithium iron phosphate single battery packs formed by connecting the single lithium iron phosphate single batteries 03 and 13, 04 and 14, 05 and 15, 06 and 16, 07 and 17, 08 and 18 in parallel.
In order to protect the lithium iron phosphate battery packs, eight lithium iron phosphate battery packs are connected in series and then connected with the output end of the first battery module through the first circuit breaker RD.
In order to enable the first battery module to output 220V alternating voltage, the first battery module 1 further comprises a first DC/AC converter 102, a second circuit breaker RD22, a third circuit breaker RD21 and a first alternating current output socket 104, wherein the first DC/AC converter 102 is a DC24V/AC220V converter and is used for converting direct current 24V into 220V alternating current voltage, after eight groups of lithium iron phosphate battery packs are connected in series, the positive electrode output end of the eight groups of lithium iron phosphate battery packs is connected with the positive input end of the first DC/AC converter 102 through the second circuit breaker RD22, the negative electrode output end of the eight groups of lithium iron phosphate battery packs is connected with the negative input end of the first DC/AC converter 102 through the third circuit breaker RD21, the output end of the first DC/AC converter 102 is connected with the first alternating current output socket 104 and is used for outputting 220V alternating current voltage, and the 220V alternating current voltage can be used for alternating current voltage input of a transformer substation construction device.
In order to realize management of the first battery module, the first battery module further comprises a first battery management unit 107, a first current transformer 103, a DC/DC converter 101, a first switch 105 and a plurality of fourth circuit breakers, wherein the anodes of eight groups of lithium iron phosphate batteries after being connected in series are connected with the first current transformer 103, and the first current transformer 103 is uploaded to the first battery management unit 107 through cables C2-1, C2-2, C2-3 and C2-4, and can display the current of the lithium iron phosphate batteries through a 9-inch digital display screen. After the single batteries 01-08 and 11-18 are respectively connected in parallel, the single batteries are also respectively connected to the battery management unit ports C10 to C18 through the circuit breakers RD1, RD2, RD3, RD4, RD5, RD6, RD7, RD8 and RD9, and then the single voltage value of the single lithium iron phosphate battery can be displayed through a digital display screen. The positive and negative poles of the eight series-connected lithium iron phosphate batteries are respectively connected with the positive and negative ends of the first DC/AC converter through the circuit breakers RD22 and RD21, the input end of the first DC/AC converter 102 is connected with the input end of the DC/DC converter 101 through the first switch 105, and the input end of the DC/DC converter 101 is connected with the C31 and C32 ends of the first battery management unit 107 for providing a direct current input voltage for the battery management unit.
Specifically, to realize output control of the 220V AC voltage, the first battery module further includes a first controllable switch 106, and the output terminal of the first DC/AC converter 102 is connected to the first AC output socket 104 through the first controllable switch 106, and the control terminal of the first controllable switch 106 is connected to the C34 terminal of the first battery management unit 107.
After eight groups of lithium iron phosphate batteries are connected in series, the output of the series circuit is the output of the first battery module, and the rated voltage of the single battery is 3V, so that the direct current output voltage of the first battery module is 24V, and the output end of the series circuit is connected with the output end of the first DC/AC converter, so that the direct current voltage of 24V can be converted into the alternating current voltage of 220V, and the electricity consumption requirement of overhaul construction of a transformer substation can be met.
As shown in fig. 3, the second battery module includes four series-connected lithium iron phosphate battery packs, which are connected in series and then connected to the output terminal of the second battery module.
In order to improve the reliability of the lithium iron phosphate battery packs, each lithium iron phosphate battery pack comprises two single lithium iron phosphate batteries connected in parallel, wherein the rated capacity of each single lithium iron phosphate battery is 250Ah, and the rated voltage of each single lithium iron phosphate battery is DC3V. Specifically, the first group of lithium iron phosphate batteries is formed by connecting the single batteries 21 and 31 in parallel, the second group of lithium iron phosphate batteries is formed by connecting the single batteries 22 and 23 in parallel, the third group of lithium iron phosphate batteries is formed by connecting the single batteries 23 and 33 in parallel, and the fourth group of lithium iron phosphate batteries is formed by connecting the single batteries 24 and 34 in parallel.
Specifically, in order to realize protection of the lithium iron phosphate battery pack, the second battery module further includes a fifth circuit breaker RD30, and the output terminal of the four sets of lithium iron phosphate battery packs connected in series is connected with the output terminal of the second battery module through the fifth circuit breaker RD 30. More specifically, the negative electrode output terminal of the four lithium iron phosphate battery packs connected in series is connected to the negative electrode output terminal of the second battery module through the fifth circuit breaker RD 30.
Specifically, in order that the second battery module may output 220V AC voltage, the second battery module includes a second DC/AC converter 112, a sixth circuit breaker RD32, a seventh circuit breaker RD31, and a second AC output socket 109, wherein the second DC/AC converter 112 is a DC12V/AC220V converter, and the second AC socket 109 is a 220V AC output socket. After the four lithium iron phosphate battery packs are connected in series, the positive electrode of the four lithium iron phosphate battery packs is connected with the positive electrode input end of the second DC/AC converter 112 through a sixth circuit breaker RD32, the negative electrode of the four lithium iron phosphate battery packs is connected with the negative electrode input end of the second DC/AC converter 112 through a seventh circuit breaker RD31, and the output end of the second DC/AC converter 112 is connected with the second alternating current output socket 109.
Specifically, in order to realize management of the lithium iron phosphate battery pack, the second battery module further includes a second battery management unit 113, a second current transformer 108, a plurality of eighth circuit breakers, and a second switch 110, the four groups of lithium iron phosphate battery packs are connected with ports C10, C11, C12, C13, and C18 of the battery management unit through circuit breakers RD11, RD12, RD13, RD14, and RD15, respectively, the second battery management unit may display a single voltage value of the lithium iron phosphate battery pack through a 9-inch digital display screen, after the four groups of lithium iron phosphate battery packs are connected in series, the positive electrode of the four groups of lithium iron phosphate battery packs are further connected with the second current transformer 108, the second current transformer 108 uploads the sensed current value to the second battery management unit 113 through cables C2-1 to C2-4, and the second battery management unit 113 may display the current value of the battery pack through a 9-inch digital display screen. The input terminal of the second DC/AC converter 112 is connected to the ports C31, C32 of the second battery management unit 113 through the second switch 110, and the DC voltage input is provided to the second battery management unit 113 by using the DC outputs of four series-connected lithium iron phosphate battery packs.
In order to control the AC output voltage of the second battery module, the second battery module further includes a second controllable switch 111, and an output terminal of the second DC/AC converter 112 is connected to an input terminal of the second AC socket 109 through the second controllable switch 111, and a control terminal of the second controllable switch 111 is connected to the second battery management unit 113.
After the four groups of lithium iron phosphate batteries are connected in series, the output of the series circuit is connected with the output end of the second battery module through the second circuit breaker, and the rated voltage of the single battery is 3V, so that the direct current output voltage of the first battery module is 12V, and the output end of the series circuit is connected with the output end of the second DC/AC converter, so that the direct current voltage of 12V can be converted into the alternating current voltage of 220V, and the electricity consumption requirement of overhaul and construction of a transformer substation can be met.
Specifically, in the actual use process, the output end in fig. 1 can be led to a large-current output plug-in through a plastic shell switch DC440V/240A direct-current plastic shell switch, under the condition that the switch is closed, the plug-in can supply power for an external direct-current load through large current, and when the DC110V output voltage is connected to a transformer substation direct-current system through the large-current output plug-in, the transformer substation direct-current system can be used as an emergency power supply to ensure normal and stable output of a bus of the direct-current system, and the risk of voltage loss of the transformer substation direct-current bus is avoided.
The transformer substation battery device with the rapid access to the direct current system is formed by connecting 2 single lithium iron phosphate batteries in parallel in the first battery module and the second battery module, wherein the first battery module can output 24V direct current voltage, the 4 first battery modules and the second battery module are connected in series and can output 110V direct current voltage, the output voltage is used for connecting the direct current 110V output voltage into the transformer substation direct current system through a large current output plug-in unit, and the transformer substation battery device can be used as an emergency power supply for guaranteeing normal and stable output of a bus of the direct current system and avoiding the risk of voltage loss of the direct current bus of the transformer substation; in addition, the first battery module and the second battery module can both output 220V alternating voltage, the device can meet the emergency power consumption requirement of most of transformer substation direct current systems, the device can be connected into the system within 5 minutes after being carried or installed by only 2 persons, the risk of short circuit and open circuit of the batteries can be avoided, the process of the achievement commissioning system is simple and quick, the risk of short circuit and open circuit of the batteries, which is easily caused by the traditional carrying and installing modes, is avoided, the bus voltage loss and personal electric shock risk of the direct current systems, which are caused by the conventional carrying and installing modes, are avoided, and the reliable operation of the reserve energy of the transformer substation is ensured.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (4)
1. A substation battery device for fast access to a dc system, comprising:
Four first battery modules outputting 24V direct current voltage;
a second battery module outputting a 12V dc voltage;
the direct current output ends of the four first battery modules and one second battery module
The series connection is followed by connection with a 110V direct current bus; wherein,
The first battery module comprises eight groups of lithium iron phosphate battery packs, wherein the eight groups of lithium iron phosphate battery packs are sequentially connected in series and then connected with the direct current output end of the first battery module to output 24V direct current voltage;
The second battery module comprises four groups of lithium iron phosphate battery packs, and the four groups of lithium iron phosphate battery packs are sequentially connected in series and then connected with the direct current output end of the second battery module to output 12V direct current voltage;
The first battery module further comprises a first circuit breaker, and the eight groups of lithium iron phosphate battery packs are connected in series and then connected with the direct current output end of the first battery module through the first circuit breaker; the first battery module further comprises a first DC/AC converter, a second circuit breaker, a third circuit breaker and a first alternating current output socket, wherein the first DC/AC converter is used for converting direct current 24V voltage into 220V alternating current voltage; the positive output ends of the eight groups of lithium iron phosphate battery packs after being connected in series are connected with the positive input end of the first DC/AC converter through a second circuit breaker, the negative output ends of the eight groups of lithium iron phosphate battery packs are connected with the negative input end of the first DC/AC converter through a third circuit breaker, and the output end of the first DC/AC converter is connected with the first alternating current output socket;
The second battery module further comprises a fifth circuit breaker, and the four groups of lithium iron phosphate battery packs are connected in series and then connected with the direct current output end of the second battery module through the fifth circuit breaker; the second battery module comprises a second DC/AC converter, a sixth circuit breaker, a seventh circuit breaker and a second alternating current output socket, wherein the second DC/AC converter is used for converting 12V direct current voltage into 220V alternating current voltage, after the four groups of lithium iron phosphate battery packs are connected in series, the positive pole of the four groups of lithium iron phosphate battery packs are connected with the positive pole input end of the second DC/AC converter through the sixth circuit breaker, the negative pole of the four groups of lithium iron phosphate battery packs are connected with the negative pole input end of the second DC/AC converter through the seventh circuit breaker, and the output end of the second DC/AC converter is connected with the second alternating current output socket;
The first battery module further comprises a first current transformer, a first battery management unit, a plurality of fourth circuit breakers, a first switch and a DC/DC converter, wherein the DC/DC converter is used for converting 24V direct current voltage into 12V direct current voltage; the eight lithium iron phosphate battery packs are connected in series and then connected with the first current transformer, and the first current transformer transmits the battery current value of the first battery module to the first battery management unit through a cable; the eight lithium iron phosphate battery packs are connected in series and then connected with the input end of the DC/DC converter through the first switch, and the output end of the DC/DC converter is connected with the direct current input end of the first battery management unit; each group of lithium iron phosphate batteries of the eight groups of lithium iron phosphate battery packs is also connected with the first battery management unit through a fourth circuit breaker corresponding to the lithium iron phosphate battery packs;
The second battery module further comprises a second current transformer, a second battery management unit and a plurality of eighth circuit breakers; the four groups of lithium iron phosphate battery packs are connected in series and then connected with the second current transformer, and the second current transformer transmits the battery current value of the second battery module to the second battery management unit through a cable; each group of lithium iron phosphate batteries of the four groups of lithium iron phosphate battery packs is also connected with a second battery management unit through an eighth circuit breaker corresponding to the lithium iron phosphate battery packs; the input end of the second DC/AC converter is also connected with the direct current input end of the second battery management unit through a second switch.
2. The apparatus according to claim 1, wherein:
The lithium iron phosphate battery pack at least comprises two monomer lithium iron phosphate batteries which are connected in parallel, and the rated output voltage of the monomer lithium iron phosphate batteries is 3V.
3. The apparatus according to claim 2, wherein:
The first battery module further comprises a first controllable switch, the output end of the first DC/AC converter is connected with the first alternating current output socket through the first controllable switch, and the control end of the controllable switch is connected with the first battery management unit.
4. A device according to claim 3, characterized in that:
the second battery module further comprises a second controllable switch, the output end of the second DC/AC converter is connected with the second alternating current output socket through the second controllable switch, and the control end of the controllable switch is connected with the second battery management unit.
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| WO2024152365A1 (en) * | 2023-01-20 | 2024-07-25 | Rivian Ip Holdings , Llc | Battery pack and electrical components |
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| CN202076821U (en) * | 2011-06-10 | 2011-12-14 | 北京宝盒精英科技有限公司 | Lithium iron phosphate battery emergency power supply system and battery charge-discharge management system |
| CN104578364A (en) * | 2014-12-26 | 2015-04-29 | 江苏省电力设计院 | DC (direct current) backup power supply for power distribution station |
| CN208939648U (en) * | 2018-09-13 | 2019-06-04 | 深圳供电局有限公司 | Transformer substation emergency battery device capable of being rapidly connected into direct current system |
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