A capacity module of a flow battery and a flow battery system

Abstract

The utility model belongs to the technical field of liquid flow battery energy storage, concretely relates to a kind of capacity module and liquid flow battery system of liquid flow battery, including box, electrolyte storage tank and waterproof module being installed in the box, the waterproof module includes waterproof layer, fixed hole being opened on the waterproof layer and fixing piece, the waterproof layer is multilayer composite structure, the outer layer of the waterproof layer uses waterproof sealing film, the inner layer of the waterproof layer uses flexible cladding, the fixed hole is opened in the edge portion of waterproof layer, the waterproof layer is fixed on the inner wall of the box by the fixing piece passing the fixed hole.The utility model's capacity module of liquid flow battery's waterproof layer uses multilayer composite structure, with good electrolyte corrosion resistance, improve the performance and life of liquid flow battery, simultaneously, waterproof layer is fixed on the box by fixing piece, the quick installation of waterproof layer is realized.

Description

Technical Field

[0001] This utility model relates to the field of flow battery energy storage technology, specifically to a flow battery capacity module and a flow battery system. Background Technology

[0002] As an electrochemical energy storage device, the operational stability and service life of a flow battery are closely related to the purity of its electrolyte.

[0003] In flow battery applications, the equipment is often exposed to the risk of intrusion from outdoor environments such as rain, moisture, and dust. As the component storing the core electrolyte, the electrolyte tank is highly susceptible to damage if external moisture, dust, or other impurities contaminate it, leading to significant changes in electrolyte composition and severely impacting the flow battery's performance and safety. Furthermore, if the tank leaks, the electrolyte will corrode other components of the flow battery and pollute the environment.

[0004] Therefore, it is necessary to provide new flow battery capacity modules. Utility Model Content

[0005] In view of this, the present invention provides a capacity module for a flow battery. The waterproof layer adopts a multi-layer composite structure, which has good resistance to electrolyte corrosion and can prevent external moisture from entering the electrolyte storage tank area, thereby improving the performance and life of the flow battery. At the same time, the waterproof layer is fixed to the housing by fasteners, realizing the rapid installation and fixation of the waterproof layer.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a capacity module for a flow battery is provided, including: a housing, an electrolyte storage tank installed in the housing, and a waterproof module. The waterproof module includes a waterproof layer, fixing holes formed on the waterproof layer, and fixing components. The waterproof layer is a multi-layer composite structure. The outer layer of the waterproof layer is a waterproof sealing membrane, and the inner layer of the waterproof layer is a flexible covering layer. The fixing holes are formed at the edge of the waterproof layer, and the fixing components pass through the fixing holes to fix the waterproof layer to the inner wall of the housing.

[0007] Furthermore, the outer layer of the waterproof layer is made of PVC waterproof membrane by hot-melt welding, and the inner layer of the waterproof layer is made of silicone pad material.

[0008] Furthermore, the inner layer of the waterproof layer comprises polyvinyl chloride.

[0009] Furthermore, multiple fixing holes are provided and are evenly arranged along the edge of the waterproof layer.

[0010] Furthermore, the fastener includes bolts and washers.

[0011] Furthermore, the inner wall of the housing is provided with threaded holes corresponding to the bolts.

[0012] Furthermore, the waterproof layer is located between the housing and the electrolyte storage tank, and the waterproof layer is used to prevent moisture, dust and debris from contacting the electrolyte storage tank.

[0013] Furthermore, the container body is a container body that is easy to transport, the outside of the container body is provided with a lifting interface, and the bottom of the container body is provided with a fork slot.

[0014] Furthermore, the electrolyte storage tank is a sealed container that stores battery electrolyte inside, and the structural dimensions of the electrolyte storage tank are adapted to the internal structural dimensions of the box.

[0015] This utility model also provides a flow battery system, including a capacity module of the flow battery as described in any of the above embodiments.

[0016] The beneficial effects of this utility model are as follows: The capacity module of the flow battery of this utility model includes a housing, an electrolyte storage tank installed inside the housing, and a waterproof module. The waterproof module includes a waterproof layer, fixing holes formed in the waterproof layer, and fixing components. The waterproof layer is a multi-layer composite structure. The outer layer of the waterproof layer is a waterproof sealing membrane, and the inner layer is a flexible covering layer. The fixing holes are formed at the edge of the waterproof layer, and the fixing components pass through the fixing holes to fix the waterproof layer to the inner wall of the housing. The waterproof layer of the capacity module of the flow battery of this utility model adopts a multi-layer composite structure, which has good resistance to electrolyte corrosion. It can prevent external moisture from entering the electrolyte storage tank area, and at the same time, it can also prevent the electrolyte from leaking out of the storage tank and corroding other equipment, thereby causing environmental pollution. This utility model improves the performance and lifespan of the flow battery, and at the same time, the waterproof layer is fixed to the housing by the fixing components, realizing the rapid installation and fixation of the waterproof layer. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a partial three-dimensional structural diagram of the capacity module of the flow battery according to an embodiment of the present invention (hidden parts of the casing and waterproof layer).

[0019] Figure 2 This is a schematic diagram of the unfolded state of the heat tracing module (excluding the sealing layer) according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the folded state of the installation template according to an embodiment of the present utility model;

[0021] Figure 4This is a three-dimensional structural diagram of the installation template and sealing layer of the hidden part of the heat tracing module according to an embodiment of this utility model;

[0022] Figure 5 yes Figure 1 A magnified view of a portion of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the waterproof layer and fixing holes according to an embodiment of the present invention;

[0024] Figure 7 This is a structural schematic diagram of the fastener according to an embodiment of the present utility model.

[0025] The component names and their numbers in the diagram are as follows:

[0026] The capacity module of the flow battery is 100.

[0027] Box body 1, hoisting interface 11, fork slot 12;

[0028] Electrolyte storage tank 2;

[0029] Heat tracing module 3, mounting template 31, mounting groove 32, heat tracing tape 33, sealing layer 34;

[0030] Waterproof module 4, waterproof layer 41, fixing hole 42, fastener 43, bolt 431, washer 432. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in 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 present utility model and are not intended to limit the present utility model.

[0032] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0036] A flow battery consists of power cells and capacity cells. The stack is where the flow battery performs its charging and discharging functions; the power cell of a flow battery system is typically composed of multiple stacks connected in series and parallel. The capacity cell mainly refers to the energy storage medium of the flow battery, which includes active materials, electrolyte, and solvent.

[0037] In flow battery systems, the electrolyte solution containing active materials, acting as the energy storage medium, is not stored within the battery stack but rather in a capacity module (tank) outside the stack. The energy storage capacity of a flow battery system is determined by the total amount of energy storage medium in the tank, while the system's power is determined by the battery stack. This characteristic makes the power and capacity of a flow battery system independent and facilitates the modularization of power and capacity units, resulting in flexible system configuration.

[0038] like Figure 1 As shown, this embodiment provides a flow battery capacity module 100, including a housing 1, an electrolyte storage tank 2 installed inside the housing 1, a heat tracing module 3, and a waterproof module 4. The housing 1 is used to house and install the electrolyte storage tank 2, the heat tracing module 3, and the waterproof module 4, and facilitates transportation. The electrolyte storage tank 2 is fitted to the internal dimensions of the housing 1 to store the flow battery electrolyte. The heat tracing module 3 maintains the electrolyte temperature inside the electrolyte storage tank 2 at ≥5℃ to prevent a decrease in electrolyte activity due to low temperatures. The waterproof module 4 isolates the battery from external rainwater and dust, preventing moisture and other impurities from entering the electrolyte. It also prevents leakage from the storage tank, which could cause electrolyte spillage and corrosion of other equipment, thus preventing environmental pollution. The waterproof module 4 ensures stable battery operation.

[0039] In some embodiments, the container 1 is a six-sided cuboid structure. The container 1 utilizes a transportable shipping container with a standardized design, featuring a cuboid metal frame structure and fixed dimensions. The electrolyte storage tank 2 is securely installed within the container 1, preventing shaking or collisions during transportation or handling. The standardized container 1, used for placing and installing the electrolyte storage tank 2, allows for direct transport via various modes such as rail, road, and sea, without additional modifications, reducing transportation difficulty. The container 1 is constructed of high-strength steel, possessing impact and pressure resistance, and can withstand bumps and compression during transportation, protecting the internal electrolyte storage tank 2 and heat tracing module 3 from damage. Furthermore, the container 1 itself is an independent unit, internally housing the electrolyte storage tank 2, heat tracing module 3, and waterproof module 4, reducing on-site installation and commissioning time, suitable for rapid deployment, and applicable to the rapid establishment of energy storage projects in remote areas or emergency situations.

[0040] In some embodiments, the exterior of the container 1 is provided with a lifting interface 11, and the bottom of the container 1 is provided with a fork slot 12, which facilitates loading and unloading operations by forklifts or cranes. By providing the lifting interface 11 and the fork slot 1, mechanized loading and unloading is facilitated, reducing labor costs and improving transportation efficiency.

[0041] In some embodiments, the electrolyte storage tank 2 is a sealed container that stores battery electrolyte inside. The structural dimensions of the electrolyte storage tank 2 are adapted to the internal structural dimensions of the box 1. By precisely adapting to the internal space of the box 1, the internal volume of the box 1 is maximized, thereby achieving a reasonable plan for the storage amount of electrolyte. Furthermore, by placing the electrolyte storage tank 2 inside the box 1, the overall structural strength is further improved.

[0042] In some of these embodiments, such as Figure 2 As shown, the heat tracing module 3 is laid below the electrolyte storage tank 2 to provide a suitable and stable operating temperature for the electrolyte storage tank 2. The heat tracing module 3 includes multiple mounting templates 31, mounting grooves 32 formed on the mounting templates 31, heat tracing tape 33 disposed in the mounting grooves 32, and a sealing layer 34. Figure 3 As shown, the mounting template 31 is roughly a rectangular thin plate. When multiple mounting templates 31 are folded, they are roughly wavy. The multiple mounting templates 31 are folded and unfolded quickly through an alternating folding structure. When multiple mounting templates 31 are folded, their volume can be greatly compressed, which is convenient for transportation and storage, thereby reducing transportation and storage costs. After unfolding, the multiple mounting templates 31 are laid under the electrolyte storage tank 2. They can be flexibly laid under the electrolyte storage tank 2 according to the shape of the electrolyte storage tank 2, and can be adapted to electrolyte storage tanks 2 of different sizes according to the number of mounting templates 31.

[0043] In some embodiments, the installation template 31 is made of thermally insulated extruded polystyrene board. The thermal conductivity of the installation template 31 is ≤0.03W / (m・K), the compressive strength is ≥250kPa, the width of the installation template 31 is ≤2.2m, the length can be customized, the thickness is 30-50mm, and the size of the installation template 31 is adapted to the internal dimensions of the standard container body 1.

[0044] In some embodiments, mounting grooves 32 are formed on the mounting template 31. The mounting grooves 32 are generally arranged in a U-shaped, serpentine pattern. The groove depth of the mounting grooves 32 is 10-15mm, and the width of the mounting grooves 32 matches the outer diameter of the heating cable 33. The spacing between adjacent mounting grooves 32 is set according to requirements. By providing mounting space for the heating cable 33 through the mounting grooves 32, and by matching the size of the mounting grooves 32 with the size of the heating cable 32, the heating cable 33 can be securely embedded in the mounting grooves 32, preventing displacement or detachment of the heating cable 33 during transportation, installation, and use, thereby ensuring stable heat tracing function. The serpentine layout of the mounting grooves 32 maximizes the extension path of the heating cable 33 within the limited area of ​​the mounting template 31. Furthermore, by providing an installation slot 32 that is compatible with the heat tracing cable 33, the heat tracing cable 33 can be directly embedded during installation, which reduces the difficulty of operation and improves the assembly efficiency of the heat tracing module 3. At the same time, by providing an installation slot 32, the heat tracing cable 33 can be protected from direct external pressure, reducing the probability of damage to the heat tracing cable 33 and extending the service life of the heat tracing template 3.

[0045] In some of these embodiments, such as Figure 4 As shown, the heat tracing cable 33 is laid in the mounting groove 32. The heat tracing cable 33 is used to provide heat to the electrolyte storage tank 2, thereby ensuring that the electrolyte storage tank 2 is at a suitable operating temperature. The heat tracing cable 33 is made of tin-plated braided explosion-proof and flame-retardant single-fluorine wire. The conductor resistance of the heat tracing cable 33 is ≤0.05Ω / m, and the power density is 15-30W / m. The spacing between adjacent heat tracing cables 33 is set according to the heat load requirements of the electrolyte storage tank 2. The two ends of the heat tracing cable 33 extend from the two ends of the mounting groove 32 for connecting to the power supply.

[0046] As an example, the spacing between adjacent tracing cables 33 is 50-200mm.

[0047] In some other embodiments, the heat tracing cable 33 is made of nickel-plated copper wire braided into an explosion-proof and flame-retardant single-fluorine wire.

[0048] In some embodiments, a sealing layer 34 is applied over the mounting template 31 to seal the heating cable 33 within the mounting groove 32 and reflect heat. The sealing layer 34 is made of adhesive-backed aluminum foil, which not only seals the heating cable 33 within the mounting groove 32 of the mounting template 31 but also forms a heat-reflective layer, providing uniform heat to the external electrolyte storage tank 2 and preventing excessively high local temperatures in the electrolyte storage tank 2.

[0049] As an example, the sealing layer 34 is an embossed aluminum foil layer with adhesive backing, with a thickness of 0.3-0.5 mm, used to improve heat reflection efficiency.

[0050] In some of these embodiments, such as Figure 5 , Figure 6 As shown, the shape and dimensions of the waterproof module 4 are adapted to the shape and dimensions of the electrolyte storage tank 2. The waterproof module 4 covers the outside of the electrolyte storage tank 2 to prevent external moisture from entering the electrolyte storage tank 2 area, preventing moisture from mixing into the electrolyte through valves on the electrolyte storage tank 2, avoiding changes in the electrolyte composition, and thus ensuring the stability of the flow battery. The waterproof module 4 includes a waterproof layer 41, fixing holes 42 formed in the waterproof layer 41, and fixing components 43. The waterproof layer 41 has a multi-layer composite structure. The outer layer of the waterproof layer 41 is a waterproof sealing membrane with good resistance to electrolyte corrosion. The inner layer of the waterproof layer 41 is a flexible covering layer used to cover the electrolyte storage tank 2.

[0051] As an example, the outer layer of the waterproof layer 41 is made of PVC waterproof membrane by hot-melt welding, and the inner layer of the waterproof layer 41 is made of silicone pad material.

[0052] In some embodiments, fixing holes 42 are formed at the edge of the waterproof layer 41. Multiple fixing holes 42 are formed and evenly arranged at the edge of the waterproof layer 41. They are used to fix the waterproof layer 41 to the inner wall of the housing 1 by passing the fixing member 43 through the fixing holes 42, thereby realizing the fixed installation of the waterproof module 4.

[0053] In some of these embodiments, such as Figure 7 As shown, the fastener 43 includes a bolt 431 and a washer 432. A threaded hole corresponding to the bolt 431 is provided on the inner wall of the housing 1. After the washer 432 is placed through the bolt 431, the bolt 421 is then passed through the fixing hole 42 on the waterproof layer 41. Finally, the bolt 431 is fixed to the inner wall of the housing 1, thereby achieving that the waterproof layer 41 covers the outside of the electrolyte storage tank 2, and the waterproof layer 41 is located on the inner wall of the housing 1. That is to say, the waterproof layer 41 is located between the housing 1 and the electrolyte storage tank 2. The waterproof layer 41 is used to prevent moisture, dust and debris from contacting the electrolyte storage tank 2, reducing the impact of external pollutants on the flow battery and reducing the failure risk of the flow battery.

[0054] The production process of the heat tracing module 3 of this utility model is as follows: First, the installation template 31 is processed by cutting a rectangular thin plate from extruded polystyrene board with a thermal conductivity ≤0.03W / (m・K) and compressive strength ≥250kPa. The width of the installation template 31 is ≤2.2m, and the thickness is 30-50mm, with the length customized according to customer requirements. Subsequently, U-shaped serpentine installation grooves 32 are opened on the installation template 31. The depth of the installation grooves 32 is 10-15mm, and the width is adapted to the outer diameter of the heat tracing cable 33. As an example, if the outer diameter of the heat tracing cable is 8mm, then the width of the installation grooves 32 is 8.5-9mm. The spacing between adjacent installation grooves 32 is determined according to the required heat load. The setup is as follows: Next, the heating cable 33 is embedded into the mounting groove 32. The heating cable 33 is an explosion-proof and flame-retardant single-fluorine wire braided with tin-plated or nickel-plated copper wire. It is embedded into the mounting groove 32 along the serpentine path to ensure that the heating cable 33 fits tightly against the groove wall and that there is no looseness in the mounting groove 32. Then, a sealing layer 34 is used for encapsulation. An embossed aluminum foil layer with adhesive backing and a thickness of 0.3-0.5mm is covered on the surface of the mounting template 31 as a sealing layer and fixed by adhesive backing, thereby encapsulating the heating cable 33 in the mounting groove 32 and improving the heat reflection efficiency. Finally, multiple heating modules 3 are folded into a wave shape for storage or transportation. During the installation and use phase of this utility model, before the electrolyte storage tank 2 is placed inside the box 1, multiple folded wave-shaped heat tracing modules 3 are unfolded and placed at the bottom of the box 1. Finally, the heat tracing cables 33 at both ends are thrown out from the side wall of the box 1 and connected to the power supply, thereby improving the uniformity and reliability of temperature control of the electrolyte storage tank 2, while reducing construction difficulty and production cost.

[0055] The installation process of the capacity module 100 of the flow battery of this utility model is as follows: Before installing the electrolyte storage tank 2, unfold the folded wave-shaped heat tracing module 3, lay it flat at the bottom of the box 1, align it according to the corresponding position, and swing the two ends of the heat tracing cable 33 out from the side wall of the box 1 and connect it to the power supply. When the electrolyte temperature is <0℃, the heat tracing cable 33 can be activated to provide heat to the electrolyte storage tank 2 through the heat tracing module 3. Unfold the waterproof layer 41 and cover the outside of the electrolyte storage tank 2. Then, hoist the sealed storage tank 2 into the box 1 and place it above the heat tracing module 3, so that the bottom of the storage tank is tightly attached to the sealing layer 34 of the heat tracing module 3 to improve the heat conduction efficiency. Fix the waterproof layer 41 to the threaded hole on the inner wall of the box 1 by passing the fixing hole 2 on the edge of the fixing piece 43 through the fixing hole 2, thereby achieving the isolation of external moisture and dust.

[0056] The capacity module 100 of this utility model for a flow battery includes a housing 1, an electrolyte storage tank 2 installed inside the housing 1, a heat tracing module 3, and a waterproof module 4. The heat tracing module 3 includes multiple mounting templates 31, mounting grooves 32 formed on the mounting module 31, a heat tracing cable 33 disposed in the mounting groove 32, and a sealing layer 34. The waterproof module 4 includes a waterproof layer 41, fixing holes 42 formed on the waterproof layer 41, and fixing components 43. By setting up the heat tracing module 3 and embedding the heat tracing cable 33 into the mounting groove 32 during production, and installing the heat tracing cable 33 in the serpentine mounting groove 32, the path of the heat tracing cable 33 is extended. Furthermore, multiple heat tracing modules 3 are folded into a wave shape and can be used immediately after unfolding, improving on-site installation efficiency and shortening installation time. Moreover, the heat tracing module 3 adopts a modular design. The design is adaptable to different sizes, with strong flexibility. A sealing layer 34 is included to improve heat utilization and ensure temperature uniformity. A waterproof module 4 is also included, with a waterproof layer 41 placed between the housing 1 and the electrolyte storage tank 2. The waterproof layer 41 has a multi-layer composite structure, with an outer waterproof sealing membrane and an inner flexible covering layer, providing excellent resistance to electrolyte corrosion. This effectively prevents external moisture from entering the electrolyte storage tank 2 area and prevents moisture from mixing into the electrolyte through valves on the electrolyte storage tank 2, thus improving the performance and lifespan of the flow battery. Furthermore, fixing holes 42 are provided on the waterproof layer 41, and fasteners 43 pass through these holes to fix the waterproof layer 41 to the inner wall of the housing 1, enabling rapid installation and fixation of the waterproof module 4.

[0057] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A capacity module of a flow battery, characterized in that, include: The enclosure comprises an electrolyte storage tank installed inside the enclosure and a waterproof module. The waterproof module includes a waterproof layer, fixing holes formed on the waterproof layer, and fixing components. The waterproof layer is a multi-layer composite structure. The outer layer of the waterproof layer is a waterproof sealing membrane, and the inner layer of the waterproof layer is a flexible covering layer. The fixing holes are formed at the edge of the waterproof layer, and the fixing components pass through the fixing holes to fix the waterproof layer to the inner wall of the enclosure.

2. The capacity module of a liquid flow battery of claim 1, wherein, The outer layer of the waterproof layer is made of PVC waterproof membrane by hot-melt welding, and the inner layer of the waterproof layer is made of silicone pad material.

3. The capacity module of a liquid flow battery of claim 2, wherein, Multiple fixing holes are provided and are evenly arranged along the edge of the waterproof layer.

4. The capacity module of a liquid flow battery of claim 1, wherein, The fasteners include bolts and washers.

5. The capacity module of a liquid flow battery of claim 4, wherein, The inner wall of the housing is provided with threaded holes corresponding to the bolts.

6. The capacity module of the flow battery according to claim 1, characterized in that, The waterproof layer is located between the housing and the electrolyte storage tank, and the waterproof layer is used to prevent moisture, dust and debris from contacting the electrolyte storage tank.

7. The capacity module of the flow battery according to claim 1, characterized in that, The container body is a container body that is easy to transport. The outside of the container body is equipped with a lifting interface, and the bottom of the container body is equipped with a forklift slot.

8. The capacity module of the flow battery according to claim 1, characterized in that, The electrolyte storage tank is a sealed container that stores battery electrolyte inside. The structural dimensions of the electrolyte storage tank are adapted to the internal structural dimensions of the enclosure.

9. The capacity module of the flow battery according to claim 2, characterized in that, The inner layer of the waterproof layer is made of polyvinyl chloride.

10. A flow battery system, characterized in that... The capacity module of the flow battery as described in any one of claims 1 to 9.

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