CN-121983631-A - Modularized pile structure and flow battery

Abstract

The invention belongs to the technical field of energy storage of flow batteries, and particularly relates to a modularized pile structure and a flow battery, wherein the modularized pile structure comprises a plurality of pile units which are stacked, and the pile units are sequentially arranged along the stacking direction; each electric pile unit comprises a plurality of single cells which are stacked, a first end plate and a second end plate, the single cells are sequentially arranged along the stacking direction, the first end plate and the second end plate are respectively pressed on two sides of the single cells which are stacked, a first inflow port and a first outflow port are formed in the first end plate, a second inflow port and a second outflow port are formed in the second end plate, and a fluid shorting port and a circuit shorting port are formed in the first end plate and the second end plate. The modularized pile structure realizes the quick short circuit, isolation and replacement of the circuit and the flow path of the local fault unit of the flow battery through the modularized design, ensures the continuous operation of the system, and improves the maintenance efficiency and the operation reliability.

Inventors

• DONG LIANG
• WANG XILONG

Assignees

• 绍兴柯桥星辰新能源有限公司

Dates

Publication Date

20260505

Application Date

20260210

Claims (10)

1. 1. The modularized electric pile structure is characterized by comprising a plurality of electric pile units which are stacked and arranged in sequence along the stacking direction, wherein each electric pile unit comprises a plurality of single cells which are stacked and arranged, a first end plate and a second end plate, the single cells are sequentially arranged along the stacking direction, the first end plate and the second end plate are respectively pressed on two sides of the single cells which are stacked and arranged, a first inflow port and a first outflow port are formed in the first end plate, a second inflow port and a second outflow port are formed in the second end plate, and a fluid short-circuit port and a circuit short-circuit port are formed in the first end plate and the second end plate.
2. 2. The modular cell stack structure of claim 1, further comprising a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are respectively pressed on two sides of the cell stack units in a plurality of stacked arrangement, and a total inflow port and a total outflow port are formed in the first cover plate.
3. 3. The modular cell stack structure of claim 2, wherein the total inflow port and the total outflow port are provided in two, respectively, the total inflow port flowing into the positive electrolyte and the negative electrolyte, respectively, and the total outflow port flowing out of the positive electrolyte and the negative electrolyte, respectively.
4. 4. The modular cell stack structure of claim 1, wherein the first inflow port, the first outflow port, the second inflow port, and the second outflow port are each provided with two, each flowing into or out of a positive electrolyte and a negative electrolyte, respectively, the first inflow port and the second inflow port being on the same axis, and the first outflow port and the second outflow port being on the same axis.
5. 5. The modular galvanic pile structure according to claim 1, wherein the first inflow port, the first outflow port, the second inflow port and the fourth outflow port are each provided with a shut-off valve therein, the shut-off valves being screw-type flow path shut-off valves which, when screwed inward, effect shut-off of flow paths in the corresponding first inflow port, first outflow port, second inflow port and fourth outflow port.
6. 6. The modular stack structure of claim 1, wherein the fluid shorting port is a first bypass port and a second bypass port formed in the first end plate, and a third bypass port and a fourth bypass port formed in the second end plate.
7. 7. The modular stack structure of claim 6, wherein the first bypass port, the second bypass port, the third bypass port, and the fourth bypass port are each provided with two, respectively leading in or out, of a positive electrolyte and a negative electrolyte.
8. 8. The modular cell stack structure of claim 1, wherein the cell stack unit further comprises a plurality of fastening bolts, the fastening bolts being sequentially fastened through the first end plate, the plurality of stacked unit cells, and the second end plate.
9. 9. The modular stack structure of claim 6, wherein when the stack unit fails, a shorting line is used to connect the first bypass port on the first end plate and the third bypass port on the second end plate and the second bypass port on the first end plate and the fourth bypass port on the second end plate, respectively, and a shorting wire is used to connect the circuit shorting ports on the first end plate and the second end plate of the failed stack unit.
10. 10. A flow battery comprising the modular stack structure of any one of claims 1-9.

Description

Modularized pile structure and flow battery Technical Field The invention relates to the technical field of energy storage of flow batteries, in particular to a modularized pile structure and a flow battery. Background The flow battery is used as a novel energy storage technology, and has the characteristics of high efficiency, safety, reliability, long cycle life and the like, and has remarkable advantages in the aspect of smooth renewable energy output and stable power supply of a power grid. Unlike conventional secondary batteries, flow batteries store electrical energy in flowing electrolyte, and store and release energy through redox reactions of active materials, and the reaction process does not involve phase change, thereby having a longer service life. The current flow battery pile is assembled in groups by adopting a series multi-section stacking structure. When a certain reaction monomer in the series-type multisection stacking structure has performance decline or flow failure in actual operation, the pile is often required to be disassembled integrally for maintenance or replacement, so that the maintenance period is long, the operation is complex, the integral performance is easily influenced due to the change of the monomer matching state in the disassembly and assembly process, the operation reliability and the maintenance efficiency of the flow battery system are further reduced, and the wide application of the flow battery system in large-scale energy storage is limited. Therefore, it is necessary to provide a new modular cell stack structure. Disclosure of Invention In view of this, the invention provides a modularized pile structure, which not only improves output current, eliminates bypass current to reduce loss and prolong service life, but also realizes total voltage superposition by connecting battery units in parallel to form a battery module and connecting the battery modules in series, thereby improving overall power and system adaptability of the pile. The technical scheme includes that the modularized pile structure comprises a plurality of pile units which are stacked, wherein the pile units are sequentially arranged along the stacking direction, each pile unit comprises a plurality of single cells which are stacked, a first end plate and a second end plate, the single cells are sequentially arranged along the stacking direction, the first end plate and the second end plate are respectively pressed on two sides of the single cells which are stacked, a first inflow port and a first outflow port are formed in the first end plate, a second inflow port and a second outflow port are formed in the second end plate, and a fluid short-circuit port and a circuit short-circuit port are formed in the first end plate and the second end plate. Further, the modularized pile structure further comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively pressed on two sides of the pile units, which are stacked, and a total inflow port and a total outflow port are formed in the first cover plate. Further, the total inflow port and the total outflow port are respectively provided with two, the total inflow port respectively flows into the positive electrolyte and the negative electrolyte, and the total outflow port respectively flows out of the positive electrolyte and the negative electrolyte. Further, the first inflow port, the first outflow port, the second inflow port and the second outflow port are respectively provided with two, positive electrolyte and negative electrolyte respectively flow in or out, the first inflow port and the second inflow port are on the same axis, and the first outflow port and the second outflow port are on the same axis. Further, the first inflow port, the first outflow port, the second inflow port and the fourth outflow port are respectively provided with a shut-off valve, the shut-off valves adopt screwed-type flow path shut-off valves, and when the shut-off valves are screwed inwards, corresponding shut-off of flow paths in the first inflow port, the first outflow port, the second inflow port and the fourth outflow port is realized. Further, the fluid short circuit port is formed by arranging a first bypass port and a second bypass port on the first end plate, and arranging a third bypass port and a fourth bypass port on the second end plate. Further, the first bypass port, the second bypass port, the third bypass port and the fourth bypass port are respectively provided with two, and the positive electrolyte and the negative electrolyte are respectively led in or led out. Further, the pile unit further comprises a plurality of fastening bolts, and the fastening bolts sequentially penetrate through the first end plate, the single cells arranged in a plurality of stacking mode and the second end plate to be fixed. Further, when the pile unit fails, a short circuit pipeline is adopted to connect the fir