CN219372030U - Shutdown control system for flow battery - Google Patents
Shutdown control system for flow battery Download PDFInfo
- Publication number
- CN219372030U CN219372030U CN202320725129.3U CN202320725129U CN219372030U CN 219372030 U CN219372030 U CN 219372030U CN 202320725129 U CN202320725129 U CN 202320725129U CN 219372030 U CN219372030 U CN 219372030U
- Authority
- CN
- China
- Prior art keywords
- liquid
- pipeline
- storage tank
- negative electrode
- anode
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Hybrid Cells (AREA)
Abstract
The utility model discloses a shutdown control system for a flow battery, which comprises a liquid path structure and a circuit structure, wherein the liquid path structure consists of a plurality of electric piles, an anode electrolyte storage tank and a cathode electrolyte storage tank, the anode electrolyte storage tank is connected with an anode liquid path inlet and outlet of the electric piles, the cathode electrolyte storage tank is connected with a cathode liquid path inlet and outlet of the electric piles, and the circuit structure consists of a plurality of electric piles, an energy storage converter PCS, a battery management system BMS and an energy management system EMS.
Description
Technical Field
The utility model relates to the technical field of flow batteries, in particular to a shutdown control system for a flow battery.
Background
In order to relieve the impact of renewable energy power generation on a power grid, improve the acceptance of the power grid on renewable energy power generation, peak regulation, frequency modulation, smooth output, plan tracking and the like are needed to be carried out through a high-capacity energy storage device, the intermittence and instability of renewable energy power generation are relieved, and the impact of large-scale renewable energy power generation on the power grid is reduced, so that the large-scale energy storage technology is a key technology for solving the popularization and application of renewable energy power generation.
The flow battery is one of electrochemical energy storage, and the electrolyte of the energy storage active substances of the positive electrode and the negative electrode is stored in a liquid storage tank outside the battery, is conveyed into the electric pile through an electrolyte circulating pump and a pipeline and realizes charge and discharge reaction on the electrode, and has the characteristics of mutually independent output power and energy storage capacity of the battery, deep discharge, no potential safety hazard, long service life and the like. Various flow battery systems are developed at the present stage, and the energy storage technology of the all-vanadium flow battery is mainly applied to engineering and industrialization energy storage stations with the power of more than megawatt.
The flow battery system is formed by connecting a plurality of electric piles in series and parallel, and electrolyte continuously circulates between the electric piles and an electrolyte liquid storage tank in the operation process. After the flow battery is stopped, a considerable amount of electrolyte is still stored in the electric pile, electrochemical reaction in the electric pile still continues, current and heat are generated, and the electric pile and the electrolyte are affected due to poor treatment.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a shutdown control system for a flow battery, which can simply and effectively judge the residual electric quantity in a pile, discharge the residual electric quantity in the pile to a power grid and solve the problems in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the application discloses a shutdown control system for a flow battery, which comprises a liquid path structure and a circuit structure, wherein the liquid path structure consists of a plurality of electric stacks, an anode electrolyte storage tank and a cathode electrolyte storage tank, the anode electrolyte storage tank is connected with an anode liquid path inlet and outlet of the electric stacks, and the cathode electrolyte storage tank is connected with a cathode liquid path inlet and outlet of the electric stacks; the circuit structure is composed of a plurality of electric piles, an energy storage converter PCS, a battery management system BMS and an energy management system EMS, wherein the positive electrode and the negative electrode of the energy storage converter PCS are respectively and correspondingly connected with two stages of the electric piles, and the battery management system BMS, the energy management system EMS and the energy storage converter PCS are mutually in communication connection.
Preferably, an anode liquid outlet pipeline is arranged between a liquid outlet of the anode electrolyte storage tank and a liquid path inlet of the electric pile, and a valve and an electrolyte circulating pump are arranged on the anode liquid outlet pipeline; an anode liquid inlet pipeline is arranged between the liquid inlet of the anode electrolyte storage tank and the liquid path outlet of the galvanic pile, and a heat exchanger is arranged on the anode liquid inlet pipeline.
Preferably, an auxiliary pipeline of the positive circuit is arranged between the liquid outlet pipeline and the liquid inlet pipeline of the positive circuit, and a valve is arranged on the auxiliary pipeline of the positive circuit.
Preferably, a negative electrode liquid outlet pipeline is arranged between a liquid outlet of the negative electrode electrolyte storage tank and a liquid path inlet of the electric pile, and a valve and an electrolyte circulating pump are arranged on the negative electrode liquid outlet pipeline; a negative electrode liquid inlet pipeline is arranged between a liquid inlet of the negative electrode electrolyte storage tank and a liquid path outlet of the galvanic pile, and a heat exchanger is arranged on the negative electrode liquid inlet pipeline.
Preferably, a negative electrode loop auxiliary pipeline is arranged between the negative electrode liquid outlet pipeline and the negative electrode liquid inlet pipeline, and a valve is arranged on the negative electrode loop auxiliary pipeline.
Preferably, the battery management system BMS is used for carrying out information transmission with the energy storage converter PCS and the energy management system EMS, and is used for detecting voltage and temperature signals of the electric pile, evaluating the charge state of the battery and controlling the operation of the valve, the heat exchanger and the electrolyte circulating pump.
Preferably, the energy management system EMS is configured to monitor and manage the battery energy storage device and related power generation source, load, and grid-connected point links, and control the normal operation of the devices in the system according to a pre-designed application operation mode, so as to implement unified scheduling.
Preferably, the energy storage converter PCS is connected to the power grid through a transformer.
Preferably, the battery management system BMS, the energy management system EMS and the energy storage converter PCS communicate with each other in a wired or wireless manner.
The utility model has the beneficial effects that:
according to the shutdown control system for the flow battery, disclosed by the utility model, the available state SOC of the residual charge in the battery is monitored in real time through the mutual coordination among the battery management system BMS, the energy management system EMS and the energy storage converter PCS, so that the residual electric quantity in a pile can be simply and effectively judged; by monitoring the voltage of the electric pile and regulating and controlling the working states of each circulating pump, pipeline valve and heat exchanger in the electric pile system, after entering a small circulation flow, the redundant electric quantity in the electric pile is discharged to a power grid, so that the problems of electric energy waste and overhigh temperature inside the electric pile caused by self-discharge of the electric pile when the residual electric quantity of a battery is high are solved, and the operation safety, system efficiency and economy of an energy storage power station are greatly improved.
The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a connection of a shutdown control system for a flow battery of the present utility model;
wherein: 1-liquid circuit structure, 2-circuit structure, 3-positive pole circuit auxiliary pipeline, 4-negative pole circuit auxiliary pipeline.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
Examples:
referring to fig. 1, the shutdown control system for a flow battery of the present utility model includes a liquid path structure 1 (a thin implementation connection portion) and a circuit structure 2 (a broken line connection portion), and is characterized in that: the liquid path structure 1 consists of a plurality of galvanic piles, an anode electrolyte storage tank and a cathode electrolyte storage tank, wherein the anode electrolyte storage tank is connected with an anode liquid path inlet and an outlet of the galvanic piles, and the cathode electrolyte storage tank is connected with a cathode liquid path inlet and an outlet of the galvanic piles; the circuit structure 2 is composed of a plurality of electric piles, an energy storage converter PCS, a battery management system BMS and an energy management system EMS, wherein the positive electrode and the negative electrode of the energy storage converter PCS are respectively and correspondingly connected with two stages of the electric piles, and the battery management system BMS, the energy management system EMS and the energy storage converter PCS are in communication connection with each other.
The battery management system BMS can be in information transmission with an external system such as an energy storage converter PCS and an energy management system EMS; the battery management system BMS may be used to detect stack voltage and temperature signals; the battery management system BMS may be used to evaluate a state of charge (SOC) of the battery; the battery management system BMS can control the operation of the valve, the cooling water circulating pump and the electrolyte circulating pump on the heat exchanger;
the energy management system EMS is used for monitoring and managing battery energy storage equipment, related links such as power generation power supply, load, grid connection point and the like, making reasonable judgment according to a pre-designed application operation mode, controlling normal operation of all equipment in the system and realizing unified scheduling;
an anode liquid outlet pipeline is arranged between the liquid outlet of the anode electrolyte storage tank and the liquid path inlet of the electric pile, and a valve and an electrolyte circulating pump are arranged on the anode liquid outlet pipeline; an anode liquid inlet pipeline is arranged between a liquid inlet of the anode electrolyte storage tank and a liquid path outlet of the galvanic pile, and a heat exchanger is arranged on the anode liquid inlet pipeline; an auxiliary pipeline 3 (thick solid line) of the positive circuit is arranged between the liquid outlet pipeline and the liquid inlet pipeline of the positive circuit, and a valve is arranged on the auxiliary pipeline 3 of the positive circuit.
A negative electrode liquid outlet pipeline is arranged between a liquid outlet of the negative electrode electrolyte storage tank and a liquid path inlet of the electric pile, and a valve and an electrolyte circulating pump are arranged on the negative electrode liquid outlet pipeline; a negative electrode liquid inlet pipeline is arranged between a liquid inlet of the negative electrode electrolyte storage tank and a liquid path outlet of the electric pile, and a heat exchanger is arranged on the negative electrode liquid inlet pipeline; an auxiliary pipeline 4 (thick solid line) of the negative electrode loop is arranged between the negative electrode liquid outlet pipeline and the negative electrode liquid inlet pipeline, and a valve is arranged on the auxiliary pipeline 4 of the negative electrode loop.
The PCS is connected with a power grid through a transformer; the battery management system BMS, the energy management system EMS and the energy storage converter PCS are communicated in a wired or wireless mode.
The implementation process comprises the following steps:
in the starting-up operation process of the PCS of the energy storage converter, the battery management system BMS stops when receiving an energy management system EMS stop instruction or when the system fault of the PCS of the energy storage converter occurs, the battery management system BMS sets the charging and discharging power threshold values of the PCS of the energy storage converter to be 0, and enters a stop flow after judging that the PCS of the energy storage converter stops charging and discharging;
after entering the shutdown process, the BMS preferentially monitors the available State (SOC) of the residual charge in the battery in real time, sets a shutdown threshold, and can directly shutdown when the available state is lower than the shutdown threshold, which indicates that the electric quantity in the electric pile system is not too much and the electric pile and the pipeline system are not damaged. When the power supply is higher than the shutdown threshold, the electric quantity in the electric pile is more, and a small-cycle shutdown control system needs to be entered to further discharge the residual electric quantity in the electric pile to a power grid;
when the available State (SOC) of the residual charge in the battery is lower than a shutdown threshold value of 30%, the electrolyte circulating pump is directly stopped, the electrolyte circulating flow is stopped, and valves on the positive liquid outlet pipeline and the negative liquid outlet pipeline are closed;
when the state of availability (SOC) of the remaining charge in the battery is higher than the "shutdown threshold 30%", a small cycle shutdown discharge system is entered: maintaining the running state of the electrolyte circulating pump, opening valves on the auxiliary pipelines of the positive electrode loop and the negative electrode loop, and closing valves on the liquid outlet pipelines of the positive electrode and the negative electrode; BMS gives PCS discharge power, BMS increases the limit value of discharge power from 0 to 1/2 of rated power, PCS discharges according to the power of the power grid within the limit value of BMS power, electrolyte temperature is monitored in real time in the discharging process, if the temperature is higher than 45 ℃ of a cooling system threshold value, BMS controls a cooling water circulating pump on a starting heat exchanger to cool the electrolyte;
when the BMS detects that the voltage of the single pile is lower than a 'discharge threshold' by 200V, the discharge power limit value of the PCS is set to 0, and the PCS stops discharging; after the discharge is stopped, BMS monitors the temperature of the electrolyte in real time, the temperature is 45 ℃ lower than the threshold value of a cooling system, a cooling water circulating pump on a heat exchanger is closed, the electrolyte circulating pump is closed, the flow of the electrolyte in the electric pile is stopped, and valves on an auxiliary pipeline of the positive electrode loop and an auxiliary pipeline of the negative electrode loop are closed.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. The utility model provides a stop control system for flow battery, includes liquid way structure (1) and circuit structure (2), its characterized in that: the liquid path structure (1) consists of a plurality of galvanic piles, an anode electrolyte storage tank and a cathode electrolyte storage tank, wherein the anode electrolyte storage tank is connected with an anode liquid path inlet and an anode liquid path outlet of the galvanic piles, and the cathode electrolyte storage tank is connected with a cathode liquid path inlet and an anode liquid path outlet of the galvanic piles; valves and electrolyte circulating pumps are arranged on liquid path pipelines between the electric pile and the positive electrolyte storage tank and between the electric pile and the negative electrolyte storage tank, the circuit structure (2) is composed of a plurality of electric piles, an energy storage converter PCS, a battery management system BMS and an energy management system EMS, the positive electrode and the negative electrode of the energy storage converter PCS are respectively and correspondingly connected with two stages of the electric pile, and the battery management system BMS, the energy management system EMS and the energy storage converter PCS are in communication connection with each other.
2. The shutdown control system for a flow battery of claim 1, wherein: an anode liquid outlet pipeline is arranged between the liquid outlet of the anode electrolyte storage tank and the liquid path inlet of the electric pile, and a valve and an electrolyte circulating pump are arranged on the anode liquid outlet pipeline; an anode liquid inlet pipeline is arranged between the liquid inlet of the anode electrolyte storage tank and the liquid path outlet of the galvanic pile, and a heat exchanger is arranged on the anode liquid inlet pipeline.
3. The shutdown control system for a flow battery of claim 2, wherein: an auxiliary pipeline (3) of the positive circuit is arranged between the liquid outlet pipeline and the liquid inlet pipeline of the positive circuit, and a valve is arranged on the auxiliary pipeline (3) of the positive circuit.
4. The shutdown control system for a flow battery of claim 1, wherein: a negative electrode liquid outlet pipeline is arranged between a liquid outlet of the negative electrode electrolyte storage tank and a liquid path inlet of the electric pile, and a valve and an electrolyte circulating pump are arranged on the negative electrode liquid outlet pipeline; a negative electrode liquid inlet pipeline is arranged between a liquid inlet of the negative electrode electrolyte storage tank and a liquid path outlet of the galvanic pile, and a heat exchanger is arranged on the negative electrode liquid inlet pipeline.
5. The shutdown control system for a flow battery of claim 4, wherein: an auxiliary pipeline (4) of the negative electrode loop is arranged between the liquid outlet pipeline and the liquid inlet pipeline of the negative electrode, and a valve is arranged on the auxiliary pipeline (4) of the negative electrode loop.
6. A shutdown control system for a flow battery as defined in claim 3 or 5, wherein: and the battery management system BMS is used for carrying out information transmission with the energy storage converter PCS and the energy management system EMS, detecting stack voltage and temperature signals, evaluating the charge state of the battery and controlling the operation of a valve, a heat exchanger and an electrolyte circulating pump.
7. The shutdown control system for a flow battery of claim 6, wherein: the energy management system EMS is used for monitoring and managing battery energy storage equipment, related power generation power supply, load and grid-connected point links, and controlling equipment in the system to normally operate if an application operation mode is designed in advance.
8. The shutdown control system for a flow battery of claim 1, wherein: and the PCS of the energy storage converter is connected with a power grid through a transformer.
9. The shutdown control system for a flow battery of claim 1, wherein: the battery management system BMS, the energy management system EMS and the energy storage converter PCS are communicated in a wired or wireless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320725129.3U CN219372030U (en) | 2023-04-05 | 2023-04-05 | Shutdown control system for flow battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320725129.3U CN219372030U (en) | 2023-04-05 | 2023-04-05 | Shutdown control system for flow battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219372030U true CN219372030U (en) | 2023-07-18 |
Family
ID=87142175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320725129.3U Active CN219372030U (en) | 2023-04-05 | 2023-04-05 | Shutdown control system for flow battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219372030U (en) |
-
2023
- 2023-04-05 CN CN202320725129.3U patent/CN219372030U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102856612B (en) | Mixed power source system | |
| Joseph et al. | Battery storage systems in electric power systems | |
| WO2017156679A1 (en) | Adjustment and control method for flow battery and adjustment and control system thereof, and flow battery | |
| CN103928697B (en) | A kind of flow battery system with emergency power supply function | |
| CN108282007B (en) | Communication battery module charging current limiting strategy | |
| CN109572487B (en) | Shutdown control method of fuel cell hybrid power system | |
| CN104882620B (en) | Method and device for realizing self protection on high-low temperature halt of flow battery system | |
| CN204497336U (en) | Multikilowatt fuel cell lithium ion battery hybrid power device | |
| CN109599935A (en) | Light hydrogen energy-storage power supplying apparatus and its method of supplying power to | |
| CN114243782A (en) | Hybrid energy storage energy routing management system based on wave energy power generation | |
| CN108110826A (en) | The control method and system of the energy regenerating of redox flow cell device | |
| CN111987786A (en) | Energy management system and method based on household combined heat and power supply | |
| CN219372030U (en) | Shutdown control system for flow battery | |
| CN105186602B (en) | Control the method, apparatus and system of electric power system output | |
| CN111816941A (en) | Energy storage integrated system of retired lithium iron phosphate power battery | |
| CN214154157U (en) | Energy storage system with mixed flow battery and lithium battery | |
| CN209313514U (en) | Light hydrogen energy-storage power supplying apparatus | |
| CN213959823U (en) | Uninterrupted aluminum fuel power supply system based on aluminum-air battery | |
| CN104242362A (en) | Power generation system and energy storage control device thereof | |
| CN112737130A (en) | Energy storage system with mixed flow battery and lithium battery and working method thereof | |
| CN112152257A (en) | Distributed energy system and control method thereof | |
| CN111180761A (en) | Method for releasing residual energy when vehicle-mounted fuel cell is shut down | |
| CN216872034U (en) | Protector for stopping, pressure maintaining and leakage current of flow battery system | |
| CN111261906A (en) | Hydrogen supply discharge protection system of fuel cell | |
| CN216435945U (en) | Small-size redox flow battery energy storage circulation system based on zero carbon building |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |