CN-224217483-U - Low leakage loss energy storage unit

Abstract

The utility model belongs to the field of all-vanadium liquid flow energy storage units, and discloses a low leakage loss energy storage unit. Comprises a pile in a power box, a pile liquid inlet branch main pipeline and a pile liquid outlet branch main pipeline which are connected with the pile in the power box. The power consumption of the optimized all-vanadium redox flow battery circulating pump is reduced, the efficiency of a battery system is improved, and the height of a power container is reduced by about 15% by canceling a coil structure in the power container on the premise of meeting the optimal leakage loss.

Inventors

• LEI XIANDAO
• MA ZONGREN
• YU JIALU
• XU HUI
• WANG YUWEI
• WANG HAO
• DU RONGRONG
• JIANG SHAN
• WANG HONGYU

Assignees

• 三峡新能源吉木萨尔发电有限公司

Dates

Publication Date

20260508

Application Date

20250519

Claims (5)

1. 1. The low-leakage-loss energy storage unit is characterized by comprising a pile in a power box, a pile liquid inlet branch main pipeline and a pile liquid outlet branch main pipeline, wherein the pile liquid inlet branch main pipeline and the pile liquid outlet branch main pipeline are connected with the pile in the power box.
2. 2. The low leakage loss energy storage unit according to claim 1, wherein DN50 is used as the main galvanic pile feed-in branch line and the main galvanic pile feed-out branch line.
3. 3. The low leakage loss energy storage unit of claim 1, wherein the lengths of the main galvanic pile liquid inlet branch pipeline and the main galvanic pile liquid outlet branch pipeline are 6.5m.
4. 4. The low leakage loss energy storage unit according to claim 1, wherein the main pile liquid inlet branch pipeline and the main pile liquid outlet branch pipeline adopt a full straight pipe section plane laying mode.
5. 5. The low leakage loss energy storage unit of claim 1, wherein the stack is a 750KW battery module.

Description

Low leakage loss energy storage unit Technical Field The utility model belongs to the field of all-vanadium liquid flow energy storage units, and particularly relates to a low leakage loss energy storage unit. Background The leakage loss of the all-vanadium redox flow battery is one of important factors affecting the system efficiency, and the larger leakage loss can cause the temperature rise and damage of a local pipeline of the system or the precipitation of pentavalent vanadium in a local electrolyte, so that the battery performance is affected, and irreversible economic loss is caused. The existing technical scheme of leakage loss is that the inlet and outlet pipe sections of a cell pile liquid circuit are lengthened, namely, the length of a thinner pipe section on the cell pile liquid circuit is increased, the pipeline resistance R is in direct proportion to the pipeline length L and in inverse proportion to the pipeline cross section S, and the relationship can be expressed by the formula R=ρSL, wherein ρ is the resistivity of electrolyte. By increasing the pipeline length L, the pipeline resistance can be increased, so that the leakage current is reduced, and the leakage loss is reduced. The scheme can effectively reduce leakage loss, but the pipeline layout is limited by the structure, and a plurality of elbows with smaller pipe diameters are required to be added, so that the resistance of the whole system is improved. The application of the high-power battery module requires corresponding high-flow support, the resistance of the whole system is necessarily improved by improving the flow, the circulating pump in the battery system requires larger output force to meet the flow lift requirement of the system, and the overall energy consumption loss of the system is correspondingly increased. Because the pile is integrated in the power container, the coil pipe structure needs to occupy certain container height, under standard container application, the height design of the pile is limited, the pile height is taken as a standard, and the customized container is required to be high, so that the cost and the supply cycle time are increased. Disclosure of utility model In order to overcome the defects of the prior art, the utility model provides the low-leakage-loss energy storage unit, which improves the efficiency of a battery system and optimizes the cost by eliminating a coil pipe structure and increasing the length of a branch main pipeline. The low leakage loss energy storage unit comprises a pile in a power box, a pile liquid inlet branch main pipeline and a pile liquid outlet branch main pipeline, wherein the pile liquid inlet branch main pipeline and the pile liquid outlet branch main pipeline are connected with the pile in the power box. Further, DN50 was used as the main galvanic pile liquid inlet branch line and the main galvanic pile liquid outlet branch line. Further, the lengths of the main pile liquid inlet branch pipeline and the main pile liquid outlet branch pipeline are 6.5m. Furthermore, the electric pile liquid inlet branch main pipeline and the electric pile liquid outlet branch main pipeline adopt a full straight pipe section plane laying mode. Further, the electric pile is a 750KW battery module. Compared with the prior art, the utility model has the beneficial effects that: 1. Coil pipe canceling structure The coil pipe structure can cause the fluid to be greatly blocked in the flowing process, so that the flowing resistance is generated, and meanwhile, local vortex is easy to form at the parts such as an elbow and the like, so that the energy loss is caused. Eliminating the coil structure can eliminate these adverse factors effectively, reduce the energy consumption in the fluid conveying process and raise the system efficiency. 2. Increasing branch main line length Increasing the length and the inner diameter of the straight tube segment can significantly reduce the resistance to fluid flow in the pipeline. The design of the planar laying of the full straight pipe section and no elbow reduces the leakage loss and simultaneously reduces the pressure loss and improves the system efficiency. Drawings The utility model will be further described with reference to the drawings and the detailed description FIG. 1 is a schematic diagram of a prior art energy storage unit; Fig. 2 is a schematic diagram of a low leakage loss energy storage unit according to the present utility model. In the figure, a pile liquid inlet DN25 straight pipe and a pile liquid inlet DN25 elbow, a pile liquid outlet DN25 straight pipe and a pile liquid inlet DN25 elbow, a pile liquid inlet branch main pipeline DN50, a pile liquid outlet branch main pipeline DN50 and a pile 5. Detailed Description The present utility model is described in detail below by way of specific examples, but the scope of the present utility model is not limited thereto. Unless otherwise specified, the experimental methods used in the pr