CN216489874U - Parallel type alternating current-direct current integrated power supply based on lithium battery - Google Patents
Parallel type alternating current-direct current integrated power supply based on lithium battery Download PDFInfo
- Publication number
- CN216489874U CN216489874U CN202121663354.6U CN202121663354U CN216489874U CN 216489874 U CN216489874 U CN 216489874U CN 202121663354 U CN202121663354 U CN 202121663354U CN 216489874 U CN216489874 U CN 216489874U
- Authority
- CN
- China
- Prior art keywords
- module
- battery
- power supply
- voltage
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 25
- 229910052744 lithium Inorganic materials 0.000 title claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 18
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical group [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 8
- 239000002253 acid Substances 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the technical field of power supply and distribution of a power system, and aims to solve the technical problem that a whole set of backup power supply fails due to the fault of a lead-acid battery connected in series in a battery pack Energy-saving, efficient and environment-friendly integrated AC/DC power supply.
Description
Technical Field
The utility model relates to the technical field of power supply and distribution of an electric power system, in particular to a lithium battery parallel type alternating current and direct current integrated power supply.
Background
The AC-DC integrated power supply provides DC voltage and AC power of different levels for primary equipment, secondary equipment, communication management and other equipment of a power system, and ensures normal operation and use of the equipment.
At present, a group of storage batteries are charged by a group of chargers basically by end users of a transformer substation, a switching station and a distribution network, 220V or 110V direct current is output, and the batteries are used as a backup power supply by connecting 18 or 9 or 12V lead-acid batteries in series; the problem that the service life of the lead-acid battery and the single-section fault caused by series connection cause the failure of the whole set of backup power supply always troubles users and vast power engineers. The safety of the lithium battery applied to the industrial field at high voltage of 220V or 110V has not been verified and solved, so a scheme for solving the application of the lithium battery to an electric power system is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the fault of a lead-acid battery connected in a battery pack in series causes the failure of the whole set of backup power supply, the utility model provides a lithium battery-based parallel AC/DC integrated power supply.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
the AC-DC integrated power supply based on the lithium battery parallel connection type comprises at least one charging module, at least one boosting module, at least two battery packs, an inversion module and a monitoring module, wherein the battery packs are connected in parallel, and the battery packs internally comprise a plurality of lithium batteries connected in series; the input end of the charging module is used for being connected with a mains supply, and the output end of the charging module is respectively connected with the battery pack, the input end of the boosting module and the input end of the inversion module; the monitoring module is respectively connected with the charging module, the battery pack, the boosting module and the inversion module, and is used for monitoring the state information of the charging module, the battery pack, the boosting module and the inversion module; the charging module is used for converting alternating current into low-voltage direct current, the battery pack is used for providing a backup power supply, the boosting module is used for converting the low-voltage direct current into high-voltage direct current, and the inversion module is used for inverting the low-voltage direct current into alternating current. The lithium battery is adopted, the condition that the lead-acid battery is prone to failure and breaks down is avoided, the battery pack does not directly output high voltage, the low-voltage direct current is converted into high-voltage direct current by the aid of the boosting module, safety is guaranteed, the battery packs are connected in parallel, and even if the battery of one battery pack fails, the normal output voltage can be guaranteed.
Preferably, the type of the lithium battery is a lithium iron phosphate battery, and the lithium iron phosphate battery has the advantages of high safety, low manufacturing cost, long service life and parallel redundancy capacity increase.
Further, the battery pack is provided with a battery management system, and the monitoring module is connected with the battery management system.
Further, the voltage range of the low-voltage direct current is 12V-72V, and the voltage range of the high-voltage direct current is 100V-250V.
Further, the voltage of the low-voltage direct current is 48V, and the voltage of the high-voltage direct current is 110V or 220V.
Furthermore, the number of the charging modules is two, and the number of the boosting modules is two.
Further, the charging module is connected with a double-circuit commercial power through a circuit breaker, the circuit breaker is a double-power automatic switching circuit breaker, and the double-circuit commercial power is more guaranteed.
The beneficial effects brought by the implementation of the utility model are as follows:
the lithium battery is adopted, the condition that the lead-acid battery is prone to failure and breaks down is avoided, the battery pack does not directly output high voltage, the boosting module is adopted to convert low-voltage direct current into high-voltage direct current, safety is guaranteed, the battery packs are connected in parallel, and even if the battery of one battery pack fails, normal output voltage can be guaranteed to the outside, so that the problem that the fault of the lead-acid battery connected in the battery pack in series causes failure of the whole backup power supply is solved, and the integrated AC/DC power supply with safety, energy conservation, high efficiency and environmental protection is provided for an electric power system. In addition, the lithium iron phosphate battery has the advantages of high safety, low manufacturing cost, long service life, parallel redundancy capacity increase and the like.
Drawings
Fig. 1 is a schematic block diagram of a parallel type ac/dc integrated power supply provided in an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection relationship between monitoring modules according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a seamless handover provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The following is a proposed scheme technology, which comprises a monitoring system of an integrated power supply, a charging module, a DC-DC boosting module, a 48V lithium iron battery module and an inverter module; the charging module, the DCDC boosting module and the 48V lithium iron battery module can be connected in parallel for redundancy and capacity increase.
Referring to fig. 1 and 2, the ac/dc integrated power supply based on the lithium battery parallel connection type includes at least one charging module, at least one boosting module, at least two battery packs, an inversion module and a monitoring module, wherein the battery packs are connected in parallel, and the battery packs include a plurality of lithium batteries connected in series inside;
the input end of the charging module is used for being connected with a mains supply, and the output end of the charging module is respectively connected with the battery pack, the input end of the boosting module and the input end of the inversion module;
the monitoring module is respectively connected with the charging module, the battery pack, the boosting module and the inversion module, the monitoring module is used for monitoring state information of the charging module, the battery pack, the boosting module and the inversion module, and the monitoring module is used for signal acquisition, control and information uploading to a background for monitoring;
the charging module is used for converting alternating current into low-voltage direct current, converting the alternating current into a direct current power supply to charge the battery pack and supplying power to the boosting module, wherein the direct current converted by the charging module can be used for communication screens and automatic distribution network equipment;
the battery pack is used for providing a backup power supply, the boosting module is used for converting low-voltage direct current into high-voltage direct current, and the boosted voltage of the boosting module is supplied to primary and secondary equipment of the high-voltage cabinet for use; the inversion module is used for inverting and boosting the low-voltage direct current into power-frequency alternating current. The inversion module is provided by the commercial power when the commercial power alternating current inlet wire is electrified, and is provided by the battery pack when the alternating current inlet wire is disconnected.
The lithium battery is adopted, the condition that the lead-acid battery is prone to failure and breaks down is avoided, the battery pack does not directly output high voltage, the low-voltage direct current is converted into high-voltage direct current by the aid of the boosting module, safety is guaranteed, the battery packs are connected in parallel, and even if the battery of one battery pack fails, the normal output voltage can be guaranteed.
Preferably, the type of the lithium battery is a lithium iron phosphate battery, the lithium iron phosphate battery is widely used in the communication field and the electric vehicle, and the lithium iron phosphate battery has the advantages of high safety, low manufacturing cost, long service life, capacity of being used in parallel capacity increase and the like.
Further, the Battery pack is provided with a Battery Management System (BMS), and the monitoring module is connected to the Battery Management System. And modules such as a battery polling module and the like are not required to be added, and the monitoring system can read the information content of the battery management system.
Furthermore, the voltage range of the low-voltage direct current is 12V-72V, and the voltage range of the high-voltage direct current is 100V-250V.
Further, the voltage of the low-voltage direct current is 48V, and the voltage of the high-voltage direct current is 110V or 220V.
In one embodiment of the present invention, the number of the charging modules is two, including a first charging module and a second charging module; the number of the boosting modules is two, and the boosting modules comprise a first boosting module and a second boosting module.
Further, the charging module is connected with a double-circuit commercial power through a circuit breaker, the circuit breaker is a double-power automatic switching circuit breaker, and the double-circuit commercial power is more guaranteed.
In the prior art, direct current output by a charging module and direct current output by a battery pack generally need to be switched, when commercial power exists, the boosting module boosts voltage by using the direct current output by the charging module, when the commercial power disappears, the boosting module boosts voltage by using the direct current output by the battery pack, a time gap exists between the two switching operations, if a relay is used for switching, a larger gap exists, even though a triode or an MOS tube is used for switching, although the switching time is short, a gap still exists, and some influences can be caused on precision equipment.
Referring to fig. 3, it is assumed that the charging module outputs DC48V, the battery pack is connected to a voltage conversion module, the voltage conversion module converts the voltage of the battery pack into DC46V and outputs the DC46V to the boosting module, the voltage conversion module is provided with an overvoltage protection circuit, the voltage conversion module collects the voltage from the output end of the charging module through a voltage sampling circuit, and when the voltage at the output end of the charging module is greater than DC46V, the voltage conversion module enters an overvoltage protection state and turns off the output; when the mains supply is powered off, the voltage drop of the output end of the charging module needs a process, when the voltage drops to or below DC46V, the voltage conversion module exits the overvoltage protection state and outputs DC46V to the boosting module, and therefore seamless switching is achieved; when the commercial power is electrified again, the voltage of the output end of the charging module rises, when the voltage rises to be higher than DC46V, the voltage conversion module enters an overvoltage protection state, the output is closed, and the charging module supplies power to the boosting module, so that seamless switching is realized.
The beneficial effects brought by the implementation of the utility model are as follows:
the lithium battery is adopted, the condition that the lead-acid battery is prone to failure and breaks down is avoided, the battery pack does not directly output high voltage, the boosting module is adopted to convert low-voltage direct current into high-voltage direct current, safety is guaranteed, the battery packs are connected in parallel, and even if the battery of one battery pack fails, normal output voltage can be guaranteed to the outside, so that the problem that the fault of the lead-acid battery connected in the battery pack in series causes failure of the whole backup power supply is solved, and the integrated AC/DC power supply with safety, energy conservation, high efficiency and environmental protection is provided for an electric power system. In addition, the lithium iron phosphate battery has the advantages of high safety, low manufacturing cost, long service life, parallel redundancy capacity increase and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The AC-DC integrated power supply based on the lithium battery parallel connection type is characterized by comprising at least one charging module, at least one boosting module, at least two battery packs, an inversion module and a monitoring module, wherein the battery packs are connected in parallel, and the battery packs internally comprise a plurality of lithium batteries connected in series;
the input end of the charging module is used for being connected with a mains supply, and the output end of the charging module is respectively connected with the battery pack, the input end of the boosting module and the input end of the inversion module;
the monitoring module is respectively connected with the charging module, the battery pack, the boosting module and the inversion module, and is used for monitoring the state information of the charging module, the battery pack, the boosting module and the inversion module;
the charging module is used for converting alternating current into low-voltage direct current, the battery pack is used for providing a backup power supply, the boosting module is used for converting the low-voltage direct current into high-voltage direct current, and the inversion module is used for inverting the low-voltage direct current into alternating current.
2. The parallel AC/DC integrated power supply based on lithium batteries according to claim 1, wherein the type of the lithium battery is a lithium iron phosphate battery.
3. The parallel AC-DC integrated power supply based on lithium batteries according to claim 2, characterized in that the battery pack is provided with a battery management system, and the monitoring module is connected with the battery management system.
4. The parallel type AC-DC integrated power supply based on the lithium battery of claim 1, wherein the voltage range of the low-voltage DC power is 12V-72V, and the voltage range of the high-voltage DC power is 100V-250V.
5. The parallel AC-DC integrated power supply based on lithium batteries according to claim 4, characterized in that the voltage of the low-voltage direct current is 48V, and the voltage of the high-voltage direct current is 110V or 220V.
6. The parallel type AC-DC integrated power supply based on the lithium battery as claimed in claim 1, wherein the number of the charging modules is two, and the number of the boosting modules is two.
7. A parallel AC/DC integrated power supply based on lithium batteries according to any one of claims 1 to 6, characterized in that the charging module is connected with two-way commercial power through a circuit breaker, and the circuit breaker is a dual-power automatic switching circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121663354.6U CN216489874U (en) | 2021-07-21 | 2021-07-21 | Parallel type alternating current-direct current integrated power supply based on lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121663354.6U CN216489874U (en) | 2021-07-21 | 2021-07-21 | Parallel type alternating current-direct current integrated power supply based on lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216489874U true CN216489874U (en) | 2022-05-10 |
Family
ID=81431689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121663354.6U Active CN216489874U (en) | 2021-07-21 | 2021-07-21 | Parallel type alternating current-direct current integrated power supply based on lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216489874U (en) |
-
2021
- 2021-07-21 CN CN202121663354.6U patent/CN216489874U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110011408B (en) | Mobile emergency power supply system and working method thereof | |
| CN203859583U (en) | Multipath parallel redundant substation DC power supply system | |
| CN211089487U (en) | High-voltage direct-current remote power supply system of 5G base station | |
| CN210007468U (en) | kinds of mobile emergency power supply device | |
| CN209709744U (en) | A kind of communication base station power supply system that retired power battery echelon utilizes | |
| CN214176917U (en) | Family energy storage cabinet with universality | |
| CN211183508U (en) | Power supply control device | |
| CN216489874U (en) | Parallel type alternating current-direct current integrated power supply based on lithium battery | |
| CN103904776A (en) | Intelligent power distribution room power system | |
| CN210273591U (en) | Mixed type direct current power supply device for transformer substation | |
| CN204481544U (en) | A kind of wireless charging device for transmission line on-line monitoring equipment | |
| CN105429283A (en) | Power supply system for substation | |
| CN206340972U (en) | A kind of DC power system of achievable on-line rapid estimation | |
| CN104467157A (en) | Multi-voltage-class standby direct-current operating power source | |
| CN110535226A (en) | A kind of power echelon ferric phosphate lithium cell backup power supply system | |
| CN219980490U (en) | Energy storage system capable of being charged in multiple ways | |
| Tian et al. | Microgrid Solution of Smart Energy Station Based on HVDAC System | |
| CN219394438U (en) | Distributed energy storage system for replacing alternating current power supply outside switch station | |
| CN218386936U (en) | Alternating current power supply system for transformer substation applying distributed energy storage | |
| CN217282363U (en) | Substation power transformation system based on new energy | |
| CN204089338U (en) | Intelligent power distribution room power-supply system | |
| CN220492129U (en) | High-voltage battery pack | |
| CN114884167B (en) | Transformer substation direct-current control system based on lithium iron phosphate storage battery | |
| CN217282277U (en) | Tunnel special emergency power supply | |
| CN211127222U (en) | Adaptive micro power supply system and alternating current battery module thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Parallel AC/DC integrated power supply based on lithium batteries Granted publication date: 20220510 Pledgee: Agricultural Bank of China Limited Xiamen Lianqian Branch Pledgor: XIAMEN ZHONGXIN ELECTRICAL EQUIPMENT Co.,Ltd. Registration number: Y2024980003775 |