Energy storage device for peak load shifting

Abstract

The utility model provides an energy storage device for peak load shifting, which comprises a machine frame, side plates arranged on the machine frame, a plurality of energy storage boxes fixedly arranged on the machine frame, each energy storage box comprises a box body and a cover plate hinged with the box body, a battery pack arranged in the energy storage box, heat exchange pipes arranged on two sides of the battery pack, and a cooling device further arranged on the machine frame. The cooling device comprises a water pump and a filtering mechanism, the water pump, the filtering mechanism and the heat exchange pipe form a circulation loop, the filtering mechanism comprises a base and a filter element, the filter element is detachably installed on the base, and the filtering mechanism is provided with an unlocking assembly. The filtering mechanism filters circulating cooling liquid, impurities are prevented from blocking the heat exchange pipes, and the cooling effect is guaranteed; and the conductivity of the cooling liquid is reduced, and the reliability of equipment operation is improved. Furthermore, the filter element is designed to be detachable, regular replacement is facilitated, cleanliness of the cooling system is guaranteed, by arranging an unlocking assembly, the replacement operation of the filter element is simplified, the maintenance efficiency is improved, and economic losses caused by maintenance shutdown are reduced.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, in particular to an energy storage device for peak shaving and valley filling. Background Art

[0002] With the significant advancement of my country's scientific and technological capabilities, numerous innovative technologies have been widely applied in the energy storage sector, injecting new vitality into energy development. As a core component of energy storage devices, the safe management of lithium batteries has always been a focus of industry attention. The complex chemical reactions within lithium batteries generate a large amount of heat. To ensure stable battery operation and extend their lifespan, a heat dissipation system is essential. Currently, mainstream energy storage devices in China generally use liquid cooling technology, which uses circulating coolant to dissipate heat generated by the batteries.

[0003] However, during circulation, the coolant inevitably comes into contact with metal components in the battery system, causing metal ions to dissolve into the coolant. These metal ions significantly increase the coolant's conductivity. High-conductivity liquids are characterized by rapid ion migration. If the coolant leaks or penetrates into the battery, the high concentration of ions can accelerate electrochemical reactions within the battery and may even cause a short circuit. These high ion concentrations can also participate in side reactions within the battery, generating gases or other harmful substances, which can affect battery performance and lifespan.

[0004] Therefore, filtering the coolant through ion exchange resin is an efficient solution; however, the existing technology has the problem of inconvenience in removing and replacing the filter element. Therefore, when replacing the filter element, the energy storage device needs to be shut down for a long time, resulting in direct economic loss. Utility Model Content

[0005] In order to overcome the problem of inconvenient removal of the filter element in the prior art, the utility model provides an energy storage device for peak shaving and valley leveling. By setting an unlocking component, the filter element can be quickly replaced, reducing the downtime of the energy storage device when replacing the filter element.

[0006] The utility model adopts the following technical solutions.

[0007] An energy storage device for peak shaving and valley filling comprises a frame, wherein the frame is provided with side panels;

[0008] The rack is fixedly provided with a plurality of energy storage boxes, each of which includes a box body and a cover plate, the cover plate is hinged to the box body, a battery pack is provided in the energy storage box, and heat exchange tubes are provided on both sides of the battery pack;

[0009] The rack is further provided with a cooling device, which includes a water pump and a filtering mechanism, and the water pump, the filtering mechanism and the heat exchange tube form a circulation loop;

[0010] The filtering mechanism includes a base and a filter element, and the filter element is detachably mounted on the base; the filtering mechanism is provided with an unlocking component.

[0011] Preferably, the cover plate is further provided with a spray head, and the spray head is connected to a water inlet pipe.

[0012] Preferably, the unlocking assembly includes a push rod, the push rod is slidably connected to the base, and a handle is rotatably provided at one end of the filter element, and the push rod can be pressed down by rotating the handle;

[0013] The unlocking assembly also includes a lock for limiting the filter element and a torsion spring for resetting the lock. The lock is rotatably connected to the base. A reset spring is provided between the push rod and the base. The push rod extends along the axial direction of the filter element so that the lower end of the push rod abuts against the lock. The filter element is provided with a clamping portion, which is used to engage with the lock to limit the filter element.

[0014] Preferably, a cooling pipe is connected between the water pump and the filtering mechanism, the cooling pipe is provided with heat exchange fins for increasing the contact area with the air, and the cooling device is provided with a cooling fan acting on the heat exchange fins.

[0015] Preferably, a lifting ring is provided on the upper end surface of the frame.

[0016] Preferably, a flame retardant partition is provided between the energy storage boxes.

[0017] Preferably, a display screen is also fixed to the rack, a temperature sensor is provided inside the energy storage box, a conductivity sensor is provided inside the cooling device, and the temperature sensor and the conductivity sensor are electrically connected to the display screen.

[0018] Preferably, a drying box is fixedly installed inside the frame, and the drying box is filled with dry particles.

[0019] Preferably, a pressure relief valve is fixedly connected to the side wall of the energy storage box.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides an energy storage device for peak load shaving and valley load filling, which has the advantages of compact structure and easy installation. The energy storage device adopts a modular design, and multiple energy storage boxes are fixed on the frame, which is convenient for transportation and installation, reducing the complexity of on-site construction. At the same time, the number of energy storage boxes can be arranged according to actual needs, which improves the flexibility of the device. Through the energy storage box, the stored energy is released during the peak period of the power grid and the electric energy is absorbed during the valley period. This can effectively reduce the peak load of the power grid, fill the valley load of the power grid, improve the utilization rate of the power grid, and play a role in regulating the output and stabilizing the power grid for the grid connection of new energy power generation.

[0022] The energy storage box features a hinged cover and body, facilitating battery pack maintenance and replacement. This design provides excellent heat dissipation, extending battery life. Heat exchange tubes are located on both sides of the battery pack within the box, forming a closed loop with an external cooling device, effectively dissipating heat generated by the battery pack and reducing its operating temperature.

[0023] A filter mechanism also filters the circulating coolant to prevent impurities from clogging the heat exchange tubes, ensuring effective cooling. It also reduces the coolant's conductivity, improving equipment reliability. Furthermore, the filter element is removable, facilitating regular replacement and ensuring a clean cooling system. The inclusion of an unlocking component simplifies filter element replacement, improving maintenance efficiency and further reducing financial losses caused by maintenance downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A magnified view of part A;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model;

[0028] Figure 4 A cross-sectional view of a filter assembly in an unlocked state according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the filter assembly in one embodiment of the present invention, in which the handle is in a vertical position;

[0030] Figure 6This is a schematic diagram of the three-dimensional structure of an energy storage box according to an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Frame; 11. Lifting ring; 12. Flame-retardant partition; 13. Display screen; 14. Side panel; 2. Energy storage box; 21. Box body; 22. Cover; 221. Sprinkler head; 23. Battery pack; 24. Heat exchange tube; 25. Pressure relief valve; 26. Water inlet pipe; 31. Water pump; 32. Filter mechanism; 321. Base; 322. Filter element; 3221. Handle; 3222. Clamping part; 323. Push rod; 324. Return spring; 325. Lock; 326. Torsion spring; 33. Cooling tube; 331. Heat exchange fin; 332. Cooling fan; 4. Drying box. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In this application, unless otherwise specified, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right in the actual use or working mode of the device, specifically the drawing direction in the drawings. The drawings are for illustrative purposes only and cannot be understood as limitations on this patent; in order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product.

[0034] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The drawings are for illustrative purposes only and should not be construed as limiting the present invention.

[0035] As attached Figure 1-6 The energy storage device for peak shaving and valley flattening shown includes a frame 1 provided with side panels 14 .

[0036] Several energy storage boxes 2 are fixedly mounted on the rack 1. These boxes 2 comprise a housing 21 and a cover 22, hingedly connected to the housing 21. Battery packs 23 are housed within the boxes 2, with heat exchange tubes 24 positioned on either side of the battery packs 23. Heat generated by the battery packs 23 during operation is transferred to the heat exchange tubes 24, which flow with coolant. This effectively controls the temperature of the battery packs 23, preventing overheating and improving their safety and lifespan.

[0037] The rack 1 is also provided with a cooling device, which includes a water pump 31 and a filter mechanism 32. The water pump 31, filter mechanism 32 and heat exchange tube 24 form a circulation loop; the coolant is continuously circulated to keep the temperature of the battery pack 23 within a safe range.

[0038] The filter mechanism 32 includes a base 321 and a filter element 322. The filter element 322 is detachably mounted on the base 321. The filter mechanism 32 is provided with an unlocking assembly. The detachable design of the filter element 322 of the filter mechanism 32 facilitates cleaning and replacement, ensuring long-term stable operation of the system.

[0039] In some embodiments, the coolant is deionized water. Deionized water has a high specific heat capacity and can absorb and store large amounts of heat, thereby effectively removing heat generated by the battery pack 23. It also has low electrical conductivity, which helps reduce the risk of short circuits in energy storage devices. However, during use, since the heat exchange tube 24 is made of metal, some metal ions inevitably enter the coolant. Therefore, the filter element 322 is provided with an ion exchange resin and melt-blown cloth filter layer to filter out metal ions and insoluble particles, thereby maintaining the stability of the coolant properties.

[0040] In some embodiments, the cover plate 22 is further provided with a sprinkler head 221 connected to a water inlet pipe 26. When the battery pack 23 catches fire, the sprinkler head 221 is affected by the high temperature of the flames and opens, rapidly releasing a large amount of water directly onto the burning battery pack 23, quickly reducing the temperature and extinguishing the flames. It also acts as an isolation device, preventing the spread of fire and protecting the equipment and surrounding environment. The addition of the sprinkler head 221 significantly improves the safety of the energy storage device, especially in the event of a sudden fire, effectively protecting equipment and personnel.

[0041] In some embodiments, the unlocking assembly includes a push rod 323, which is slidably connected to the base 321. A handle 3221 is rotatably provided at one end of the filter element 322. Rotating the handle 3221 can depress the push rod 323. A return spring 324 is provided between the push rod 323 and the base 321 to reset the push rod 323. The push rod 323 extends along the axis of the filter element 322, so that the lower end of the push rod 323 abuts against a latch 325. The unlocking assembly also includes a latch 325 for retaining the filter element 322 in position and a torsion spring 326 for resetting the latch 325. The lock buckle 325 is rotatably connected to the base 321, and the filter element 322 is provided with a clamping portion 3222, which is used to engage with the lock buckle 325 to limit the filter element 322, and the torsion spring 326 is used to apply a pre-tightening force to the lock buckle 325 to engage with the clamping portion 3222. The setting of the handle 3221 provides portability for the operator to remove the filter element 322.

[0042] When the filter element 322 needs to be replaced, the operator rotates the handle 3221 from the horizontal position to Figure 5 As shown in the vertical position, during the rotation process, the handle 3221 overcomes the elastic force of the return spring 324, causing the push rod 323 to move downward, and the other end of the push rod 323 presses the lock 325 downward, causing the lock 325 to rotate clockwise, and the claw set at one end of the lock 325 is separated from the clamping portion 3222 of the filter element 322, as shown in FIG. Figure 4 As shown, the filter element 322 is now released from its fixed connection with the base 321. The operator can then pull the filter element 322 upward, completing the removal of the old filter element 322. Subsequently, the new filter element 322 is inserted into its original position. Under the elastic force of the torsion spring 326, the lock 325 automatically engages with the engaging portion 3222 of the filter element 322 after insertion, securing the filter element 322 in place. The provision of an unlocking assembly reduces the complexity and error rate of manual operation, improving operational convenience and reliability.

[0043] In some embodiments, a cooling tube 33 is connected between the water pump 31 and the filter mechanism 32. The cooling tube 33 is equipped with heat exchange fins 331 to increase the contact area with the air. The cooling device is equipped with a cooling fan 332 that acts on the heat exchange fins 331. The combined design of heat exchange fins 331 and cooling fan 332 allows the cooling system to efficiently dissipate heat, maintaining the coolant temperature within the heat exchange tube 24 within a safe range and preventing overheating. This effective heat dissipation mechanism ensures that the battery pack 23 and other electronic components operate within the optimal temperature range, improving the stability and reliability of the system.

[0044] In some embodiments, a lifting ring 11 is provided on the upper end surface of the frame 1 to provide a convenient lifting point when the energy storage device needs to be moved or installed. The design of the lifting ring 11 makes the movement and installation of the energy storage device more convenient, reducing labor and time costs and improving work efficiency.

[0045] In some embodiments, flame-retardant partitions 12 are provided between energy storage tanks 2. In the event of a fire, flame-retardant partitions 12 can effectively prevent the spread of flames and high-temperature gases, protecting unaffected energy storage tanks 2 and further preventing the spread of fire between energy storage tanks 2. Flame-retardant partitions 12 are made of ceramic fiberboard, which has excellent high-temperature resistance, can remain stable in high-temperature environments, and provides good thermal insulation.

[0046] In some embodiments, the rack 1 is also equipped with a display screen 13, and a temperature sensor is installed inside the energy storage box 2 to monitor the temperature of the battery pack 23 in real time. The temperature sensor and conductivity sensor transmit data to the display screen 13, allowing operators to monitor the temperature of the battery pack 23 and the purity of the coolant at all times. The display screen 13 provides intuitive monitoring information, facilitating management and maintenance, reducing the risk of failures, and extending the service life of the equipment.

[0047] In some embodiments, a drying box 4 is fixedly mounted within the frame 1 and filled with desiccant particles. The desiccant particles absorb moisture from the air, maintaining a dry environment within the energy storage device. The desiccant particles are primarily composed of calcium chloride, a desiccant that chemically absorbs moisture to form a gel. This gel has a strong hygroscopic capacity and is not easily evaporated.

[0048] In some embodiments, a pressure relief valve 25 is fixedly connected to the side wall of the energy storage box 2. When a large amount of gas is generated inside the energy storage box 2 due to a fire in the battery pack 23 or other reasons, causing the internal pressure to rise, the pressure relief valve 25 will automatically open to release the excess gas, reduce the internal pressure, and prevent the energy storage box 2 from exploding and the resulting shock wave or debris from affecting other normally functioning energy storage boxes 2.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An energy storage device for peak shaving and valley filling, characterized in that: It includes a frame, wherein the frame is provided with side panels; The rack is fixedly provided with a plurality of energy storage boxes, each of which includes a box body and a cover plate, the cover plate is hinged to the box body, a battery pack is provided in the energy storage box, and heat exchange tubes are provided on both sides of the battery pack; The rack is further provided with a cooling device, which includes a water pump and a filtering mechanism, and the water pump, the filtering mechanism and the heat exchange tube form a circulation loop; The filtering mechanism includes a base and a filter element, and the filter element is detachably mounted on the base; the filtering mechanism is provided with an unlocking component.

2. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: The cover plate is further provided with a spray head, and the spray head is connected to a water inlet pipe.

3. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: The unlocking assembly includes a push rod, which is slidably connected to the base. A handle is rotatably provided at one end of the filter element, and the push rod can be pressed down by rotating the handle. The unlocking assembly also includes a lock for limiting the filter element and a torsion spring for resetting the lock. The lock is rotatably connected to the base. A reset spring is provided between the push rod and the base. The push rod extends along the axial direction of the filter element so that the lower end of the push rod abuts against the lock. The filter element is provided with a clamping portion, which is used to engage with the lock to limit the filter element.

4. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: A cooling pipe is connected between the water pump and the filtering mechanism. The cooling pipe is provided with heat exchange fins for increasing the contact area with the air. The cooling device is provided with a cooling fan acting on the heat exchange fins.

5. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: The upper end surface of the frame is provided with a lifting ring.

6. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: Flame-retardant partitions are provided between the energy storage boxes.

7. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: The frame is also fixed with a display screen, a temperature sensor is provided inside the energy storage box, a conductivity sensor is provided inside the cooling device, and the temperature sensor and the conductivity sensor are electrically connected to the display screen.

8. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: A drying box is fixedly installed inside the frame, and the drying box is filled with dry particles.

9. The energy storage device for peak shaving and valley filling according to claim 1, characterized in that: A pressure relief valve is fixedly connected to the side wall of the energy storage box.

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