Energy storage equipment for electric power integrated energy

Abstract

The invention discloses energy storage equipment for electric power comprehensive energy, which comprises an energy storage main body box, self-locking walking wheels are fixedly connected to four corners of the bottom end of the energy storage main body box, a rotating top cover is rotatably connected to the top end of the energy storage main body box, and a rotating limiting assembly is fixedly connected to the top end of one side of the energy storage main body box. A locking assembly is fixedly connected to the top end of the other side of the energy storage main body box, an air entraining assembly is fixedly installed in the middle of the top end of the rotating top cover, multiple sets of installation assemblies are symmetrically and fixedly installed in the energy storage main body box, and a cooling guide assembly is fixedly connected to the middle of the interior of the energy storage main body box through bolts; a power supply control assembly is fixedly installed in the middle of the front face of the energy storage main body box, air inlet assemblies are symmetrically installed on the two side faces of the energy storage main body box, and a bottom cooling assembly is fixedly installed in the bottom wall of the energy storage main body box. The service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices for integrated electric power, and specifically to an energy storage device for integrated electric power. Background Art

[0002] An energy storage device for integrated electric power is a device used to store electrical energy and release the electrical energy when needed to meet various demands in the integrated electric power energy system. It can effectively suppress the power fluctuations of renewable energy power generation, make the output electrical energy more stable and reliable, reduce the impact on the power grid, store electrical energy during the low load period of the power grid, release electrical energy during the peak load period, play the role of peak shaving and valley filling, optimize the operation of the power system, improve the stability and reliability of the power grid, and can quickly respond to the voltage and frequency fluctuations in the power grid, maintain the voltage and frequency stability of the power grid by releasing or absorbing electrical energy, and improve the power quality; During the charge and discharge process of the energy storage device, complex electrochemical reactions will occur inside the battery, inevitably generating heat. At the same time, components such as power conversion devices and management systems will also generate heat during operation. The superposition of multiple heat sources increases the difficulty of heat dissipation. In order to improve the energy density and compactness of some energy storage devices, the battery modules and other components inside the device are usually arranged relatively closely, which leads to narrow heat dissipation channels, poor air circulation, and difficulty in dissipating heat, easily causing the temperature inside the device to be too high. Summary of the Invention

[0003] Technical Objective: The objective of the present invention is to provide an energy storage device for integrated electric power to solve the problem proposed in the above background art that during the charge and discharge process of the energy storage device, complex electrochemical reactions will occur inside the battery, inevitably generating heat. At the same time, components such as power conversion devices and management systems will also generate heat during operation. The superposition of multiple heat sources increases the difficulty of heat dissipation. In order to improve the energy density and compactness of some energy storage devices, the battery modules and other components inside the device are usually arranged relatively closely, which leads to narrow heat dissipation channels, poor air circulation, and difficulty in dissipating heat, easily causing the temperature inside the device to be too high.

[0004] Technical Solution: To achieve the above technical objective, the present invention adopts the following technical solutions.

[0005] An energy storage device for integrated electric power, comprising an energy storage main box. At the four corner positions of the bottom end of the energy storage main box, self-locking walking wheels are fixedly connected. At the top end of the energy storage main box, a rotating top cover is rotatably connected. At the top end of one side of the energy storage main box, a rotating limit component is fixedly connected. At the top end of the other side of the energy storage main box, a locking component is fixedly connected. In the middle of the top surface of the rotating top cover, an air intake component is fixedly installed. Inside the energy storage main box, multiple groups of installation components are symmetrically and fixedly installed. In the middle of the inside of the energy storage main box, a cooling guide component is fixedly connected by bolts. In the middle of the front surface of the energy storage main box, a power supply control component is fixedly installed. On both side surfaces of the energy storage main box, air intake components are symmetrically installed. Inside the bottom wall of the energy storage main box, a bottom cooling component is fixedly installed. The device combines an air-cooling structure and a liquid-cooling structure designed to dissipate heat inside the device, improve the heat dissipation capacity of the device, and extend the service life of the device.

[0006] Preferably, the rotating limit component includes two fixing plates. The two fixing plates are symmetrically and fixedly connected to the top end of the side surface of the energy storage main box. A support shaft is fixedly connected between the two fixing plates. An inclined baffle is fixedly connected to the top end of the side surface of the energy storage main box. The support shaft penetrates through the rotating top cover. An extension plate is fixedly connected to the tail of the rotating top cover. A handle is fixedly connected to the top surface of one end of the rotating top cover, so that after the top cover rotates and opens, its rotation angle is limited to prevent the top cover from contacting the ground.

[0007] Preferably, the locking component includes a fixed lock plate. The fixed lock plate is fixedly connected to the middle of one end of the rotating top cover. A clamping groove is formed on one side of the fixed lock plate. A rotating mounting disc is rotatably installed in the middle of the side surface of the energy storage main box. A screwing block is fixedly connected to the middle of the side of the rotating mounting disc away from the energy storage main box. A locking bolt is threadedly connected to the middle of the screwing block. An anti-detaching screwing block is threadedly connected to the bottom end of the locking bolt. The locking bolt is matched and clamped with the clamping groove to lock the rotated top cover and make the device top cover stable after closing.

[0008] Preferably, the air intake component includes an exhaust duct. The exhaust duct is fixedly connected to the middle of the top surface of the rotating top cover by bolts. An air blower is fixedly installed inside the exhaust duct. A dust-proof cover is threadedly connected to the top end of the exhaust duct to reduce the entry of dust and affect the internal placed parts.

[0009] Preferably, the installation component includes a placement box fixedly installed on the bottom wall of the energy storage main box. The top of the placement box is fixedly installed with a fixed top cover through bolts. Both sides of the placement box are provided with through installation rectangular holes. The outside of the installation rectangular holes is fixedly connected with fixed U-shaped frames. A driving screw is threadedly connected to the middle of the fixed U-shaped frames. A bearing bracket is slidably connected inside the installation rectangular holes. The bearing bracket is rotationally connected to the driving screw, so as to place the energy storage devices in layers, leaving enough gaps between the energy storage devices to ensure the heat dissipation and ventilation performance between the energy storage devices.

[0010] Preferably, multiple bearing brackets are arranged inside the placement box. A total of six bearing brackets are symmetrically arranged inside the same placement box. Support blocks are fixedly connected to the bottom ends of the four bearing brackets at the upper part, and pulleys are fixedly installed at the bottom ends of the two bearing brackets at the lower part. The pulleys support the bearing bracket at the bottom and ensure its smooth moving function at the same time.

[0011] Preferably, the cooling and guiding component includes a wind guiding plate fixedly installed in the middle of the bottom wall of the energy storage main box. Two coolant storage tanks are in contact connection with both sides of the wind guiding plate. Suction holes are opened on all four sides of the wind guiding plate. A connecting rubber ring is fixedly connected to the middle of the top end of the wind guiding plate, so that the connecting rubber ring is docked with the exhaust pipe of the top plate to ensure a smooth air outlet effect.

[0012] Preferably, the power supply control component includes an installation slot opened in the middle of the front of the energy storage main box. A circulation pump is fixedly installed at the top of the installation slot. A controller is fixedly installed in the middle of the installation slot. A power supply package is fixedly installed at a corner position on one side of the front of the energy storage main box. A connecting wire is connected to the side of the power supply package, which is convenient for supplying power to drive the pump body and the fan in the equipment.

[0013] Preferably, the air intake component includes four air intake holes symmetrically opened on both sides of the energy storage main box. Filter dust nets are fixedly connected inside the four air intake holes through bolts. The setting of the air intake holes enables the outside air to quickly enter the equipment interior, and the setting of the filter dust nets reduces the amount of outside dust entering.

[0014] Preferably, the bottom cooling component includes a cooling cavity opened on the bottom wall of the energy storage main box. A cold row pipe is fixedly installed inside the cooling cavity. A number of cold row holes are opened on the bottom wall of the energy storage main box. Both ends of the circulation pump are connected and communicated with two liquid supply pipes. The other ends of the two liquid supply pipes are connected and communicated with two coolant storage tanks. The bottom ends of the two coolant storage tanks are connected and communicated with the two ends of the cold row pipe, forming a circulating flow pipeline for the coolant.

[0015] Beneficial effects: 1. In the present invention, through the designed exhaust duct, dust-proof cover, air inlet holes, dust filter net, air guide plate, and connecting rubber ring, when the induced draft fan draws out the hot air inside the energy storage main body box to the outside, the cold air from the outside enters the energy storage main body box through the air inlet holes and the dust filter net, and cooperates with the air guide plate to form multiple air ducts, accelerating the heat dissipation speed and improving the heat dissipation performance. 2. In the present invention, through the designed circulating pump, cold row pipe, and liquid supply pipe, liquid cooling is carried out inside the equipment, making the temperature at the bottom of the equipment relatively low. When the induced draft fan works, the cold air is drawn out upwards, causing the cold air to flow from bottom to top to cool the inside of the energy storage main body box. 3. In the present invention, through the designed placement box, fixed top cover, installation rectangular holes, fixed U-shaped frames, driving screws, and supporting brackets, the energy storage batteries are installed in layers, leaving a certain distance between each energy storage battery. Cooperating with the designed support blocks to fix the energy storage batteries, making the installation of the energy storage batteries more stable. The placement box, fixed top cover, and supporting brackets are all set as ventilated structures, further optimizing the heat dissipation effect of the energy storage batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a side view of the present invention; Figure 3 is of the present invention Figure 1 partial enlarged structural schematic diagram at A in; Figure 4 is of the present invention Figure 1 partial enlarged structural schematic diagram at B in; Figure 5 is a structural schematic diagram of the placement box of the present invention; Figure 6 is a schematic diagram of the position distribution of the supporting bracket, pulley, and support block of the present invention; Figure 7 is a schematic diagram of the internal structure of the cooling cavity of the present invention; Figure 8 is a schematic diagram of the internal structure of the energy storage main body box of the present invention.

[0017] In the figure: 1, energy storage main box; 2, self-locking walking wheel; 3, rotating top cover; 4, fixed lock plate; 5, engaging groove; 6, rotating mounting plate; 7, screwing block; 8, locking bolt; 9, anti-disengagement screwing block; 10, fixing plate; 11, support shaft; 12, extension plate; 13, handle; 14, exhaust duct; 15, dust cover; 16, air inlet hole; 17, dust filter net; 18, mounting groove; 19, circulation pump; 20, controller; 21, liquid supply pipe; 22, power supply pack; 23, connecting wire; 24, cooling cavity; 25, cold row pipe; 26, placement box; 27, fixed top cover; 28, mounting rectangular hole; 29, fixed U-shaped frame; 30, driving screw; 31, supporting bracket; 32, pulley; 33, support block; 34, air guide plate; 35, connecting rubber ring; 36, coolant storage tank; 37, baffle plate. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Please refer to Figure 1-8 , the present invention provides an energy storage device for integrated electric power energy, including an energy storage main box 1. Self-locking walking wheels 2 are fixedly connected to the four corner positions at the bottom end of the energy storage main box 1, which is convenient for the movement of the device. A rotating top cover 3 is rotatably connected to the top end of the energy storage main box 1. A rotating limit component is fixedly connected to the top end of one side of the energy storage main box 1. A locking component is fixedly connected to the top end of the other side of the energy storage main box 1. An air guiding component is fixedly installed in the middle of the top end of the rotating top cover 3. Multiple groups of installation components are symmetrically and fixedly installed inside the energy storage main box 1. A cooling guiding component is fixedly connected to the middle part inside the energy storage main box 1 through bolts. A power supply control component is fixedly installed in the middle of the front surface of the energy storage main box 1. Air intake components are symmetrically installed on both sides of the energy storage main box 1. A bottom cooling component is fixedly installed inside the bottom wall of the energy storage main box 1.

[0020] Furthermore, the rotating limit component includes two fixing plates 10. The two fixing plates 10 are symmetrically and fixedly connected to the top end of the side surface of the energy storage main box 1. A support shaft 11 is fixedly connected between the two fixing plates 10. An inclined baffle plate 37 is fixedly connected to the top end of the side surface of the energy storage main box 1. The support shaft 11 penetrates through the rotating top cover 3, and the rotating top cover 3 rotates along the support shaft 11. An extension plate 12 is fixedly connected to the tail of the rotating top cover 3. A handle 13 is fixedly connected to the top surface of one end of the rotating top cover 3. When opening the rotating top cover 3, hold the handle 13 by hand and lift the rotating top cover 3 upward, so that the rotating top cover 3 rotates along the support shaft 11 to open the rotating top cover 3.

[0021] Further, the locking assembly includes a fixed locking plate 4 which is fixedly connected to the middle of one end of the rotating top cover 3. A clamping groove 5 is formed on one side of the fixed locking plate 4. A rotating mounting disc 6 is rotatably mounted in the middle of the side of the energy storage main body box 1. A screwing block 7 is fixedly connected to the middle of the side of the rotating mounting disc 6 away from the energy storage main body box 1. A locking bolt 8 is threadedly connected to the middle of the screwing block 7. An anti-loosening screwing block 9 is threadedly connected to the bottom end of the locking bolt 8. The locking bolt 8 is matched and clamped with the clamping groove 5. Before opening the rotating top cover 3, first rotate the locking bolt 8 to make the locking bolt 8 and the screwing block 7 screw together, withdraw the locking bolt 8 from the screwing block 7, so that the end of the locking bolt 8 is separated from the fixed locking plate 4, and then pull the locking bolt 8 to drive the screwing block 7 and the rotating mounting disc 6 to rotate, so that the locking bolt 8 is withdrawn from the clamping groove 5 on the fixed locking plate 4, and the restriction on the rotating top cover 3 is released.

[0022] Further, the air guiding assembly includes an exhaust duct 14 which is fixedly connected to the middle of the top surface of the rotating top cover 3 by bolts. An air blower is fixedly installed inside the exhaust duct 14. The top end of the exhaust duct 14 is threadedly connected with the exhaust duct 14. The air blower discharges the air in the energy storage main body box 1 through the exhaust duct 14. The setting of the dust-proof cover 15 simply filters the outside air, reduces the dust in the air from entering the energy storage main body box 1, is conducive to keeping the inside of the energy storage main body box 1 clean, and reduces the influence of dust on the internal parts of the energy storage main body box 1.

[0023] Further, the installation assembly includes a placement box 26 with rectangular operation holes formed at both ends. The operation holes are opposite to the air guiding plates 34, which is convenient for changing the air flow path and accelerating the air flow rate inside the placement box 26. The placement box 26 is fixedly installed on the bottom wall of the energy storage main body box 1. A fixed top cover 27 is fixedly installed at the top end of the placement box 26 by bolts. The fixed top cover 27 is provided with a plurality of through holes and a soft pad is fixedly installed at the bottom end of the fixed top cover 27 for protecting the energy storage battery. Through rectangular installation holes 28 are formed on both sides of the placement box 26. A fixed U-shaped frame 29 is fixedly connected to the outside of the through rectangular installation holes 28. A driving screw 30 is threadedly connected to the middle of the fixed U-shaped frame 29. A supporting bracket 31 is slidably connected inside the through rectangular installation holes 28. When installing the energy storage battery, a breathable soft pad can be laid inside the supporting bracket 31. The supporting bracket 31 is rotatably connected to the driving screw 30. When installing the energy storage battery, place the energy storage battery on two corresponding supporting brackets 31, rotate the driving screw 30, and push the supporting bracket 31 to slide inside the through rectangular installation holes 28. Repeatedly adjust the two driving screws 30 to clamp and fix the energy storage battery with the supporting brackets 31.

[0024] Further, there are multiple sets of supporting brackets 31 inside the placement box 26. A total of six supporting brackets 31 are symmetrically arranged inside the same placement box 26. At the bottom ends of the four supporting brackets 31 located above, there are support blocks 33 fixedly connected. At the bottom ends of the two supporting brackets 31 located below, there are pulleys 32 fixedly installed. When one of the supporting brackets 31 at the bottom slides in the installation rectangular hole 28, the pulley 32 moves while fitting against the bottom wall of the energy storage main body box 1. After placing the energy storage batteries at the bottom layer, the upper-layer batteries are installed according to the same steps. The support blocks 33 at the bottom of the supporting brackets 31 in the upper layer will squeeze the energy storage batteries in the lower layer to ensure the stability of the installation.

[0025] Further, the cooling guide assembly includes a wind guide plate 34. The wind guide plate 34 is fixedly installed in the middle of the bottom wall of the energy storage main body box 1. Two coolant storage tanks 36 are in contact connection on both sides of the wind guide plate 34. Suction holes are opened on all four side surfaces of the wind guide plate 34. In the middle of the top end of the wind guide plate 34, there is a connecting rubber ring 35 fixedly connected. When the induced draft fan operates, the pressure inside the wind guide plate 34 is less than the external pressure. The hot air inside the placement box 26 enters the inside of the wind guide plate 34 and then is discharged through the connecting rubber ring 35, the exhaust pipe 14, and the dust-proof cover 15.

[0026] Further, the power supply control assembly includes an installation groove 18 opened in the middle of the front surface of the energy storage main body box 1. A circulation pump 19 is fixedly installed at the top of the installation groove 18. A controller 20 is fixedly installed in the middle of the installation groove 18. A power supply pack 22 is fixedly installed at a corner position on one side of the front surface of the energy storage main body box 1. A connecting wire 23 is connected to the side of the power supply pack 22. The connecting wire 23 and the power supply pack 22 are provided for supplying power to the circulation pump 19, the induced draft fan, and the controller 20. At the same time, the controller 20 controls the circulation pump 19 and the induced draft fan through the connecting wire 23, and controls the start and stop of the circulation pump 19 and the induced draft fan through the controller 20.

[0027] Further, the air intake assembly includes four air inlet holes 16. The four air inlet holes 16 are symmetrically opened on both side surfaces of the energy storage main body box 1. Filter dust nets 17 are fixedly connected inside the four air inlet holes 16 through bolts. After the fan operates, the air inside the placement box 26 is extracted, and the outside air enters through the filter dust nets 17, and the dust in the air is intercepted.

[0028] Furthermore, the bottom cooling assembly includes a cooling cavity 24 formed in the bottom wall of the energy storage main box 1. A cold row pipe 25 is fixedly installed inside the cooling cavity 24. A number of cold row holes are formed in the bottom wall of the energy storage main box 1 to facilitate the dissipation of cold air to the outside of the cooling cavity 24. Both ends of the circulation pump 19 are connected in communication with a liquid supply pipe 21. The other end of the liquid supply pipe 21 is connected in communication with two coolant storage tanks 36. A circulation pipe body is connected between the two coolant storage tanks 36. The bottom ends of the two coolant storage tanks 36 are connected in communication with the two ends of the cold row pipe 25. The circulation pump 19 pumps out the coolant inside the first coolant storage tank 36 through the liquid supply pipe 21, and then discharges it to the cold row pipe 25 through the liquid supply pipe 21. The cold row pipe 25 transports the coolant to the second coolant storage tank 36, and then enters the first coolant storage tank 36 again through the circulation pipe body to complete the circulating flow of the coolant.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy storage device for electric power integrated energy, comprising an energy storage main box (1), characterized in that: The four corner positions at the bottom end of the energy storage main box (1) are all fixedly connected with self-locking walking wheels (2); the top of the energy storage main box (1) is rotatably connected with a rotating top cover (3); the top of one side of the energy storage main box (1) is fixedly connected with a rotating limit assembly; the top of the other side of the energy storage main box (1) is fixedly connected with a locking assembly; an air induction assembly is fixedly installed in the middle of the top of the rotating top cover (3); a plurality of groups of installation assemblies are symmetrically fixedly installed inside the energy storage main box (1); a cooling guide assembly is fixedly connected to the middle of the inside of the energy storage main box (1) by bolts; a power supply control assembly is fixedly installed in the middle of the front of the energy storage main box (1); air intake assemblies are symmetrically installed on both sides of the energy storage main box (1); and a bottom cooling assembly is fixedly installed inside the bottom wall of the energy storage main box (1).

2. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The rotation limit assembly comprises two fixing plates (10), the two fixing plates (10) are symmetrically fixedly connected to the top ends of the side surfaces of the energy storage main box (1), a support shaft (11) is fixedly connected between the two fixing plates (10), an inclined baffle (37) is fixedly connected to the top ends of the side surfaces of the energy storage main box (1), the support shaft (11) passes through the rotating top cover (3), an extension plate (12) is fixedly connected to the rear end of the rotating top cover (3), and a handle (13) is fixedly connected to the top surface of one end of the rotating top cover (3).

3. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The locking assembly comprises a fixed locking plate (4), the fixed locking plate (4) being fixedly connected to the middle of one end of the rotating top cover (3), a snap-fitting groove (5) being provided on one side of the fixed locking plate (4), a rotating mounting plate (6) being rotatably mounted on the middle of the side of the energy storage main body box (1), a screw-on block (7) being fixedly connected to the middle of a side of the rotating mounting plate (6) away from the energy storage main body box (1), a locking bolt (8) being threadedly connected to the middle of the screw-on block (7), an anti-spin block (9) being threadedly connected to the bottom end of the locking bolt (8), and the locking bolt (8) and the snap-fitting groove (5) being matched and snap-fitted.

4. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The induced air assembly comprises an exhaust duct (14), the exhaust duct (14) being fixedly connected to the middle of the top surface of the rotating top cover (3) by means of bolts, an induced draft fan being fixedly installed inside the exhaust duct (14), and a dust cover (15) being threadedly connected to the top end of the exhaust duct (14).

5. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The installation assembly comprises a placement box (26), the placement box (26) being fixedly mounted on the bottom wall of the energy storage main box (1), a fixed top cover (27) being fixedly mounted on the top of the placement box (26) by means of bolts, through-going installation rectangular holes (28) being provided on both sides of the placement box (26), a fixed U-shaped frame (29) being fixedly connected to the outside of the installation rectangular hole (28), a driving screw (30) being threadedly connected to the middle of the fixed U-shaped frame (29), a supporting frame (31) being slidably connected to the inside of the installation rectangular hole (28), and the supporting frame (31) and the driving screw (30) being rotationally connected.

6. The energy storage device for electric comprehensive energy according to claim 5, characterized in that: A plurality of groups of support frames (31) are arranged inside the placement box (26), and six support frames (31) are symmetrically arranged inside the same placement box (26). The bottom ends of the four support frames (31) located at the top are fixedly connected to support blocks (33), and the bottom ends of the two support frames (31) located at the bottom are fixedly installed with pulleys (32).

7. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The cooling guide assembly comprises an air guide plate (34), the air guide plate (34) being fixedly mounted on the middle portion of the bottom wall of the energy storage main box (1), the two sides of the air guide plate (34) being contact-connected with two coolant storage boxes (36), the four sides of the air guide plate (34) being provided with air intake holes, and the middle portion of the top end of the air guide plate (34) being fixedly connected with a connecting rubber ring (35).

8. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The power supply control assembly comprises a mounting slot (18) provided in the middle of the front face of the energy storage main box (1), a circulating pump (19) being fixedly mounted on the top of the mounting slot (18), a controller (20) being fixedly mounted in the middle of the mounting slot (18), a power supply pack (22) being fixedly mounted at a corner position on one side of the front face of the energy storage main box (1), and a connecting wire (23) being connected to the side of the power supply pack (22).

9. The energy storage device for electric comprehensive energy according to claim 1, characterized in that: The air intake assembly comprises four air intake holes (16), the four air intake holes (16) are symmetrically arranged on two side surfaces of the energy storage main box (1), and dust filters (17) are fixedly connected to the inside of the four air intake holes (16) by bolts.

10. The energy storage device for electric comprehensive energy according to claim 8, characterized in that: The bottom cooling assembly comprises a cooling cavity (24) opened on the bottom wall of the energy storage main box (1), a cooling pipe (25) is fixedly installed inside the cooling cavity (24), a plurality of cooling holes are opened on the bottom wall of the energy storage main box (1), two ends of the circulation pump (19) are connected to two liquid supply pipes (21), the other ends of the two liquid supply pipes (21) are connected to two cooling liquid storage tanks (36), and the bottom ends of the two cooling liquid storage tanks (36) are connected to the two ends of the cooling pipe (25).

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