A safe photovoltaic energy storage cabinet

Abstract

The present invention relates to the technical field of photovoltaic energy storage cabinets, and in particular to a safe photovoltaic energy storage cabinet. It comprises: an outer shell, a plurality of inner shells are fixedly connected to the outer shell, a battery pack is detachably fixedly connected to the inner shell, a symmetrically distributed cooling fan is arranged on the outside of the outer shell, the inner shell is provided with two symmetrically distributed heat dissipation holes, the inner shell is slidably connected to two symmetrically distributed blocking frames, the two blocking frames on the inner shell are jointly provided with a connecting frame, the inner shell is fixedly connected to a slide rail, an electric slider is slidably connected to the slide rail, and the electric slider of the slide rail is fixedly connected to the adjacent connecting frame. The present invention respectively detects the temperature of a plurality of battery packs during charging, and performs different degrees of heat dissipation according to the different temperatures of the plurality of battery packs, so that the plurality of battery packs are at a suitable temperature, and cooling resources are allocated as needed, so as to save energy and reduce operating costs.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic energy storage cabinets, and in particular to a safe photovoltaic energy storage cabinet. Background Art

[0002] Photovoltaic energy storage cabinet is a kind of system that combines solar photovoltaic power generation system with battery energy storage technology, aiming to improve the utilization rate of renewable energy, optimize power supply and enhance the stability of the power grid. The safe photovoltaic energy storage cabinet is an integrated solution designed to improve the safety of energy storage system. This kind of system not only has the basic functions of ordinary photovoltaic energy storage cabinet, but also uses a series of advanced technologies and strict engineering measures to ensure its reliability and safety under various operating conditions, including electrical protection, thermal management and mechanical protection. Under the battery management system, several battery packs inside the photovoltaic energy storage cabinet are charged with different powers according to their own status. The heat generated by each battery pack is different. However, the active cooling system in the thermal management of existing photovoltaic energy storage cabinets is mostly basic air cooling, and all battery packs are cooled and dissipated uniformly, but the difference in heat generation of each battery pack is ignored. This leads to overcooling of battery packs with small heat generation, which not only wastes cooling resources, but also may affect performance. Summary of the invention

[0003] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a safe photovoltaic energy storage cabinet.

[0004] The technical solution is as follows: A safe photovoltaic energy storage cabinet, comprising: an outer shell, a plurality of inner shells fixedly connected to the inner shell, a battery pack detachably fixedly connected to the inner shell, a temperature sensor for detecting itself provided in the battery pack, the plurality of inner shells jointly dividing the outer shell into two cavities, a symmetrically distributed cooling fan provided on the outside of the outer shell, the inner shell provided with two symmetrically distributed heat dissipation holes, the heat dissipation holes being connected to adjacent cavities, the inner shell being slidably connected to two symmetrically distributed blocking frames, the two blocking frames on the inner shell being jointly provided with a connecting frame, the inner shell being fixedly connected to a slide rail, an electric slider being slidably connected to the slide rail, the electric slider of the slide rail being fixedly connected to the adjacent connecting frame.

[0005] Furthermore, a plurality of guide springs in a linear array are fixedly connected to the upper and lower side surfaces of the inner shell, a sliding frame is slidably connected through the inner shell, the sliding frame is fixedly connected to the middle parts of all the guide springs in the adjacent inner shells, and a first elastic member is arranged between the inner shell and the sliding frame.

[0006] Furthermore, a plurality of guide fins are fixedly connected to both sides of the guide reed, and the plurality of guide fins on adjacent sides of two adjacent guide reeds are staggered.

[0007] Furthermore, the outer shell is fixedly connected to a servo motor, the output shaft of the servo motor is fixedly connected to a rotating shaft, the rotating shaft is fixedly connected to cams having the same number as the inner shell, and the cams are used to push adjacent sliding frames to slide along adjacent inner shells.

[0008] Furthermore, the sliding frame is slidably connected to a first clamping block, a second elastic member is provided between the sliding frame and an adjacent first clamping block, the inner shell is slidably connected to a second clamping block, and the second clamping block is used to limit the adjacent first clamping block.

[0009] Furthermore, a third elastic member is provided between the second clamping block and the adjacent inner shell, and the connecting frame is fixedly connected with a first extrusion block, and the first extrusion block is used to push the adjacent second clamping block to move.

[0010] Furthermore, the inner shell is fixedly connected to and communicated with a storage cylinder, the storage cylinder is sealingly and slidably connected to a piston shaft, and a fourth elastic member is provided between the storage cylinder and an adjacent piston shaft.

[0011] Furthermore, the inner shell is slidably connected with a rack rack, the storage cylinder is provided with a valve, the rotating end of the valve on the storage cylinder is provided with a gear, and the rack rack is meshed with the adjacent gear.

[0012] Furthermore, the sliding frame is slidably connected to a pushing block, a fifth elastic member is provided between the sliding frame and the adjacent pushing block, the piston shaft is slidably connected to a docking shaft, the docking shaft is limitedly slidably connected to the adjacent rack frame, and the pushing block is used to push the adjacent docking shaft.

[0013] Furthermore, the connecting frame is slidably connected to the two adjacent blocking frames, and a sixth elastic member is arranged between the two blocking frames and the adjacent connecting frames. The connecting frame is fixedly connected to a second extrusion block, and the second extrusion block is used to push the adjacent docking shafts to slide along the adjacent piston shafts. The inner shell is fixedly connected to a limiting block, and the limiting block is used to limit the adjacent blocking frames.

[0014] The beneficial effects are: 1. The present invention detects the temperature of several battery packs during charging respectively, adjusts the flow apertures of several heat dissipation holes, so that several battery packs can dissipate heat to different degrees when they are at different temperatures, so that several battery packs are at suitable temperatures, allocate cooling resources as needed, save energy, and reduce operating costs.

[0015] 2. By periodically adjusting the guide angle of the guide spring to the gas, the gas flow state is changed, the gas is evenly contacted with the battery pack, the temperature difference between different positions of the battery pack is reduced, the local temperature of the battery pack is made consistent, and the service life of the battery pack is extended.

[0016] 3. By preventing the airflow from passing through the fully charged battery pack and locking the position of the sliding frame, the cam will not squeeze the adjacent sliding frame during rotation, thereby reducing the operating load of the servo motor output shaft and autonomously reducing the output power of the servo motor, saving energy and reducing operating costs.

[0017] 4. By injecting the nitrogen in the storage cylinder into the inner shell and allowing the piston shaft to continuously pump the gas in the inner shell, the nitrogen in the inner shell is quickly dispersed, rapidly reducing the temperature of the battery pack. At the same time, nitrogen is an inert gas, which can suppress the probability of fire when the battery pack is overloaded and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the inner shell of the present invention;

[0020] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of the housing of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the blocking frame and the connecting frame of the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the rotating shaft and the cam of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the guide spring and the sliding frame of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the first card block and the second card block of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the third elastic member and the first extrusion block of the present invention;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the storage cylinder and the piston shaft of the present invention;

[0027] Fig.10 It is a schematic cross-sectional view of the three-dimensional structure of the storage tube of the present invention.

[0028] In the accompanying drawings: 1-outer shell, 2-inner shell, 3-battery pack, 4-cooling fan, 5-heat dissipation hole, 6-sealing frame, 7-connecting frame, 8-slide rail, 201-guide spring, 202-sliding frame, 203-first elastic member, 204-servo motor, 205-rotating shaft, 206-cam, 301-first clamping block, 302-second elastic member, 303-second clamping block, 401-third elastic member, 402-first extrusion block, 501-storage cylinder, 502-piston shaft, 503-fourth elastic member, 504-rack frame, 505-gear, 506-pushing block, 507-fifth elastic member, 508-docking shaft, 509-sixth elastic member, 510-second extrusion block, 511-limiting block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] At present, the thermal management systems of most photovoltaic energy storage cabinets adopt basic air cooling and implement unified cooling for all battery packs. Although this approach ensures heat dissipation, it does not take into account the heat differences generated by different working conditions of each battery pack. As a result, some battery packs with lower heat generation are overcooled, which not only wastes cooling resources but may also have a negative impact on their performance. The introduction of precise and personalized cooling management can adjust the cooling intensity according to the actual needs of each battery pack, thereby more effectively saving energy, optimizing system efficiency, extending battery life, and ensuring optimal overall performance.

[0031] A safe photovoltaic energy storage cabinet, such as Figure 1-Figure 4 As shown, it includes: an outer shell 1, a plurality of inner shells 2 are fixedly connected inside the outer shell 1, a battery pack 3 is detachably fixedly connected inside the inner shell 2, a temperature sensor for detecting itself is arranged inside the battery pack 3, the outer shell 1 is divided into two cavities by the plurality of inner shells 2, a symmetrically distributed cooling fan 4 is arranged outside the outer shell 1, the inner shell 2 is provided with two symmetrically distributed heat dissipation holes 5, the heat dissipation holes 5 are connected with adjacent cavities, the inner shell 2 is slidably connected with two symmetrically distributed blocking frames 6, the two blocking frames 6 on the inner shell 2 are jointly provided with a connecting frame 7, the inner shell 2 is fixedly connected with a slide rail 8, an electric slider is slidably connected inside the slide rail 8, and the electric slider of the slide rail 8 is fixedly connected with the adjacent connecting frame 7.

[0032] In the above scheme, the outer shell 1 is provided with a control terminal for integrated control of the plurality of battery packs 3. The outer shell 1 and the plurality of inner shells 2 are made of galvanized steel plates, which are low in cost, easy to process and install, and have good mechanical strength and corrosion resistance. The temperature sensors in the plurality of battery packs 3 are electrically connected to the control terminal. The plurality of inner shells 2 together divide the outer shell 1 into two left and right cavities. Figure 2 The method is explained by an example, the cavity on the left is the air inlet cavity, and the cavity on the right is the air outlet cavity. The number of cooling fans 4 symmetrically distributed on the outer shell 1 can be freely set. The cooling fans 4 are DC fans with low power consumption, small size and easy control. The heat dissipation holes 5 are composed of a plurality of through holes in a linear array, which are used to allow the external cooling gas to enter the corresponding inner shell 2 along the plurality of through holes from the air inlet cavity, and then be discharged from the plurality of through holes on one side of the air outlet cavity. The sealing frame 6 includes a plurality of sealing plates in a linear array. The sealing plates on the initial sealing frame 6 are staggered with the plurality of through holes of adjacent heat dissipation holes 5. The electric slider in the slide rail 8 is electrically connected to the control terminal, and is used to control the position of the two sealing frames 6 in real time through the connecting frame 7, that is, to adjust the degree of blocking of the adjacent heat dissipation holes 5 by the sealing frame 6, and to adjust the flow aperture of the heat dissipation holes 5. When a plurality of battery packs 3 are charged, the present invention performs different degrees of heat dissipation according to the different temperatures of the plurality of battery packs 3, allocates cooling resources as needed, saves energy, and reduces operating costs.

[0033] like Figure 5 and Figure 6 As shown, a plurality of guide springs 201 in a linear array are fixedly connected to the upper and lower side surfaces of the inner shell 2, a sliding frame 202 is slidably connected through the inner shell 2, the sliding frame 202 is fixedly connected to the middle parts of all the guide springs 201 in the adjacent inner shells 2, a first elastic member 203 is arranged between the inner shell 2 and the sliding frame 202, a plurality of guide fins are fixedly connected to both sides of the guide spring 201, and a plurality of guide fins on adjacent sides of two adjacent guide springs 201 are staggered.

[0034] In the above scheme, the guide spring 201 is made of spring steel, which has high elasticity and good fatigue resistance. The guide spring 201 is a rectangular sheet. The fixed positions of the guide spring 201 and the adjacent inner shell 2 are on the left and right sides, and the fixed positions of the sliding frame 202 and the guide spring 201 are in the middle, which is used to bend the guide spring 201 into a "V" shape, extend the flow distance of the gas, and improve the utilization rate of the cooling airflow. The first elastic member 203 is a spring, and the first elastic member 203 is used to drive the adjacent sliding frame 202 to reset and slide. The guide fins on the guide spring 201 are used to further change the direction of the cooling airflow so that the cooling airflow is evenly in contact with the battery pack 3.

[0035] like Figure 3 , Figure 5 and Figure 6As shown, the outer shell 1 is fixedly connected to a servo motor 204 , the output shaft of the servo motor 204 is fixedly connected to a rotating shaft 205 , the rotating shaft 205 is fixedly connected to cams 206 of the same number as the inner shell 2 , and the cams 206 are used to push the adjacent sliding frames 202 to slide along the inner shell 2 .

[0036] In the above scheme, the servo motor 204 is electrically connected to the control terminal, the cam 206 is elliptical in shape, and the central axis of the rotating shaft 205 coincides with the center of the cam 206, which is used to squeeze the corresponding sliding frame 202 to slide along the adjacent inner shell 2, and a wear-resistant coating is provided on the outside of the cam 206 to reduce the friction loss of the cam 206 and extend its service life. By periodically adjusting the guide angle of the guide spring 201 to the gas, the cooling airflow is evenly distributed, the temperature difference between different positions of the battery pack 3 is reduced, the overall temperature of the battery pack 3 is kept consistent, and the service life of the battery pack is extended.

[0037] When the battery pack 3 in the device is charging, the photovoltaic energy storage cabinet battery management system will perform charging operations with different powers according to the service life and battery remaining capacity of each battery pack 3, which will cause each battery pack 3 to generate different heat when charging. Figure 1 The direction is explained as an example, and the three cooling fans 4 on the left side of the outer shell 1 and the three cooling fans 4 on the right side are started. The three cooling fans 4 on the left side draw external gas into the air inlet chamber, and the gas in the air inlet chamber enters the inner shell 2 along the left heat dissipation holes 5. The gas flows from left to right along the inner shell 2 and exchanges heat with the battery pack 3 located in the inner shell 2, and then enters the air outlet chamber through the right heat dissipation holes 5. The three cooling fans 4 on the right side draw the gas in the air outlet chamber and discharge it to the outside. The above process is the basic heat dissipation process of the battery pack 3.

[0038] During the above heat dissipation process, the temperature sensor located in the battery pack 3 will detect the heat generated by its own charging, and control the electric slider in the corresponding slide rail 8 in real time, so that the electric slider on the slide rail 8 drives the connecting frame 7 to move, and the connecting frame 7 drives the two adjacent blocking frames 6 to move synchronously, so that the blocking frames 6 partially block the adjacent heat dissipation holes 5. The higher the internal temperature of the battery pack 3, the smaller the blocking area of ​​the adjacent heat dissipation holes 5 by the blocking frame 6. Finally, the flow apertures of the heat dissipation holes 5 on the battery packs 3 at different temperatures are at different sizes, so that the gas in the air inlet cavity enters a corresponding amount of gas according to the different temperatures of the battery packs 3, so that the battery pack 3 with a high degree of heat generation can be cooled through more airflow, and cooling resources are allocated on demand, saving energy and reducing operating costs.

[0039] When the battery pack 3 is cooling, the control terminal starts the servo motor 204 synchronously, and the output shaft of the servo motor 204 drives the cams 206 thereon to rotate synchronously, so that the cams 206 squeeze the adjacent sliding racks 202, and the sliding racks 202 slide along the adjacent inner shells 2. At the same time, the first elastic member 203 is compressed, and the sliding racks 202 drive the middle parts of all the guide springs 201 in the adjacent inner shells 2 to move synchronously, so that the guide springs 201 gradually change from a "one" shape to a "V" shape, so that the gas flow channel formed by the two adjacent guide springs 201 forms a bend, thereby extending the flow distance of the gas in the inner shell 2, and extending the heat exchange time between the gas and the battery pack 3. At the same time, the guide springs 201 arranged in a "V" shape 01 causes the gas to form a deflection, changes the gas flow state, makes the gas contact with the battery pack 3 evenly, and improves the utilization rate of the cooling gas. The cam 206 continues to rotate, gradually releasing the squeezing of the adjacent sliding frame 202. At this time, the first elastic member 203 drives the adjacent sliding frame 202 to reset and slide, so that all the guide springs 201 in the adjacent inner shell 2 are reset synchronously, even if the guide spring 201 gradually changes from a "V" shape to an "I" shape, and so on. By periodically adjusting the guide angle of the guide spring 201 to the gas, the airflow continuously changes the heat exchange position with the battery pack 3, reducing the temperature difference between different positions of the battery pack 3, making the overall temperature of the battery pack 3 consistent, and extending the service life of the battery pack 3.

[0040] After the battery charging is completed, the temperature of the battery pack 3 gradually decreases. When the temperature sensor in the battery pack 3 detects that the temperature of the battery pack 3 returns to normal temperature, all the cooling fans 4 are turned off, the heat dissipation of several battery packs 3 is stopped, and the servo motor 204 is turned off. The electric sliders on all the slide rails 8 drive the two adjacent blocking frames 6 to reset to the initial state through the control connecting frame 7. When the battery pack 3 needs to be charged again, the above steps are repeated.

[0041] In this embodiment, the connection relationship between the connecting frame 7 and the two adjacent blocking frames 6 is a fixed connection, but it is limited to this embodiment. In other subsequent embodiments, the connection relationship between the connecting frame 7 and the two adjacent blocking frames 6 is a sliding connection. Please refer to the specific description in the subsequent embodiments.

[0042] In a further embodiment, Figure 7 and Figure 8 As shown, the sliding frame 202 is slidably connected to the first block 301, a second elastic member 302 is arranged between the sliding frame 202 and the adjacent first block 301, the inner shell 2 is slidably connected to the second block 303, the second block 303 is used to limit the adjacent first block 301, a third elastic member 401 is arranged between the second block 303 and the adjacent inner shell 2, and the connecting frame 7 is fixedly connected to the first extrusion block 402, and the first extrusion block 402 is used to push the adjacent second block 303 to move.

[0043] In the above scheme, Figure 7 The first card block 301 and the second card block 303 both have inclined surfaces, and the inclined surface of the first card block 301 faces the right front, and the inclined surface of the second card block 303 faces the left rear. The second elastic member 302 is a tension spring, which is used to pull the adjacent first card block 301 to reset. In the initial state, the second card block 303 and the first card block 301 are staggered, that is, when the sliding frame 202 slides along the inner shell 2, the first card block 301 does not contact the adjacent second card block 303. The first extrusion block 402 has symmetrically distributed inclined surfaces, which are in the shape of an isosceles trapezoid, and the upper bottom of the first extrusion block 402 is close to the adjacent second card block 303. When the two blocking frames 6 are driven by the connecting frame 7 to completely block the corresponding heat dissipation holes 5, the first extrusion block 402 squeezes the corresponding second clamping block 303, so that the second clamping block 303 slides to the limit position of the first clamping block 301, and the second clamping block 303 locks the sliding frame 202 through the first clamping block 301, so that the airflow does not pass through the battery pack 3 that has been charged, and the position of the sliding frame 202 is locked at the same time, so that the cam 206 does not squeeze the adjacent sliding frame 202 during rotation, so that the running load of the output shaft of the servo motor 204 is reduced, and then the output power of the servo motor 204 is automatically reduced, saving energy and reducing operating costs.

[0044] When several battery packs 3 are charged together, since the power contents in the several battery packs 3 are different, any battery pack 3 will complete the charging in advance, and the charging work will be terminated under the control of the control terminal, and the temperature of the battery pack 3 will gradually decrease. When the temperature sensor inside the battery pack 3 detects that the temperature has returned to normal temperature, the electric slider on the slide rail 8 corresponding to the battery pack 3 that has completed charging drives the adjacent connecting frame 7 to move, so that the connecting frame 7 drives the two adjacent blocking frames 6 to completely block the adjacent heat dissipation holes 5, so that the gas in the air inlet cavity can no longer enter the inner shell 2 that has completed the charging work, and the cooling gas in the air inlet cavity enters the inner shell 2 of the battery pack 3 that is still in the charging state according to the distribution. When another battery pack 3 completes charging, the above steps are repeated. As the number of battery packs 3 in the charging state gradually decreases, the output power of the cooling fan 4 can be reduced or several cooling fans 4 can be turned off to save energy and reduce operating costs.

[0045] When the connecting frame 7 drives the two adjacent blocking frames 6 to completely block the adjacent heat dissipation holes 5, the connecting frame 7 drives the first extrusion block 402 thereon to move synchronously, so that the first extrusion block 402 squeezes the adjacent second clamping block 303, and the second clamping block 303 slides along the adjacent inner shell 2 under the extrusion force, and the third elastic member 401 is stretched at the same time. When the blocking frame 6 completely blocks the adjacent heat dissipation holes 5, the connecting frame 7 stops moving. At this time, the first extrusion block 402 is always in an extrusion state with the second clamping block 303, and at this time, the second clamping block 303 moves to the limit position of the adjacent first clamping block 301.

[0046] When the cam 206 squeezes the adjacent sliding frame 202 to slide along the adjacent inner shell 2, the sliding frame 202 drives the first block 301 thereon to move synchronously, so that the second block 303 squeezes the adjacent first block 301, so that the first block 301 slides along the sliding frame 202 under the squeezing force, and the second elastic member 302 is stretched. After the first block 301 bypasses the adjacent second block 303, the sliding frame 202 slides to the extreme position, and the second elastic member 302 pulls the first block 301 to reset and slide, so that the second block 303 limits the first block 301, so that the sliding frame 202 cannot be reset under the action of the first elastic member 203, that is, the cam 206 does not squeeze the adjacent sliding frame 202 during rotation, thereby reducing the running load of the output shaft of the servo motor 204, and then the control terminal autonomously reduces the output power of the servo motor 204, saving energy and reducing operating costs.

[0047] When all the battery packs 3 have completed charging, the slide rail 8 drives the corresponding two blocking frames 6 to reset to the initial state through the adjacent connecting frame 7, that is, the blocking frame 6 does not block the adjacent heat dissipation holes 5. At this time, the connecting frame 7 drives the first extrusion block 402 thereon to move synchronously, so that the first extrusion block 402 releases the extrusion of the adjacent second clamping block 303, and the third elastic member 401 pulls the second clamping block 303 to reset, so that the second clamping block 303 is separated from the limiting position of the first clamping block 301. At this time, the second clamping block 303 releases the limiting position of the first clamping block 301, and the first elastic member 203 can drive the adjacent sliding frame 202 to reset. When the battery pack 3 is charged again, the above steps are repeated.

[0048] In a further embodiment, Figure 8-Figure 10 As shown, the inner shell 2 is fixedly connected and communicated with a storage cylinder 501, the storage cylinder 501 is sealingly and slidably connected to the piston shaft 502, a fourth elastic member 503 is arranged between the storage cylinder 501 and the adjacent piston shaft 502, the inner shell 2 is slidably connected to a rack rack 504, the storage cylinder 501 is provided with a valve, the rotating end of the valve on the storage cylinder 501 is provided with a gear 505, and the rack rack 504 is meshed with the adjacent gear 505.

[0049] In the above scheme, the storage cylinder 501 stores liquefied nitrogen for rapid heat dissipation of the battery pack 3. Nitrogen is an inert gas that can reduce the probability of fire of the battery pack 3. The fourth elastic member 503 is a spring for driving the piston shaft 502 to reset. Initially, the valve on the storage cylinder 501 is in a closed state, that is, the storage cylinder 501 and the inner shell 2 are in a non-connected state. The rack rack 504 rotates the rotating end of the valve on the storage cylinder 501 through the gear 505, so that the storage cylinder 501 and the inner shell 2 are in a connected state.

[0050] like Figure 8-Figure 10As shown, the sliding frame 202 is slidably connected to a pushing block 506, a fifth elastic member 507 is provided between the sliding frame 202 and the pushing block 506, the piston shaft 502 is slidably connected to a docking shaft 508, the docking shaft 508 is limitedly slidably connected to the adjacent rack frame 504, and the pushing block 506 is used to push the adjacent docking shaft 508.

[0051] In the above scheme, Fig. 9 The push block 506 has an inclined surface, and the inclined surface of the push block 506 faces the right front. The fifth elastic member 507 is a spring, which is used to drive the push block 506 to reset. Fig. 9 To explain the direction, when the docking shaft 508 is located at the front side of the pushing block 506, the docking shaft 508 squeezes the pushing block 506 and makes the pushing block 506 bypass the docking shaft 508, so that the docking shaft 508 is located at the rear side of the pushing block 506, and the pushing block 506 drives the piston shaft 502 to move synchronously through the docking shaft 508. By injecting the nitrogen in the storage cylinder 501 into the inner shell 2 and making the piston shaft 502 continuously draw the gas in the inner shell 2, the nitrogen in the inner shell is quickly dispersed, the temperature of the battery pack 3 is rapidly reduced, and the probability of fire of the battery pack 3 is suppressed after the battery pack 3 is overloaded.

[0052] like Figure 8-Figure 10 As shown, the connecting frame 7 is slidably connected to the two adjacent blocking frames 6, and a sixth elastic member 509 is arranged between the two blocking frames 6 and the adjacent connecting frames 7. The connecting frame 7 is fixedly connected to the second extrusion block 510, and the second extrusion block 510 is used to push the adjacent docking shaft 508 to slide along the adjacent piston shaft 502. The inner shell 2 is fixedly connected to the limiting block 511, and the limiting block 511 is used to limit the adjacent pair of blocking frames 6.

[0053] In the above solution, the sixth elastic member 509 is a spring, and the sixth elastic member 509 is used to drive the adjacent blocking frame 6 to reset. Fig.10 The second extrusion block 510 has symmetrically distributed inclined surfaces in the shape of an isosceles trapezoid. The upper base of the second extrusion block 510 is located on the rear side, and the second extrusion block 510 is staggered with the first extrusion block 402. The distance from the first extrusion block 402 to the adjacent inner shell 2 is smaller than the distance from the second extrusion block 510 to the adjacent inner shell 2. The limit block 511 is used to block the adjacent blocking frame 6 from continuing to move, and to make the blocking frame 6 and the connecting frame 7 slide, so that the second extrusion block 510 pushes the docking shaft 508 to move along the piston shaft 502.

[0054] When the battery pack 3 is damaged due to aging or overload during charging, that is, the temperature sensor of the battery pack 3 detects that the internal temperature is abnormally high, the slide rail 8 drives the two blocking frames 6 to move through the adjacent connecting frame 7, so that the two blocking frames 6 completely block the adjacent heat dissipation holes 5. At this time, the blocking frame 6 contacts and limits the limit block 511, and the connecting frame 7 continues to move. The blocking frame 6 is blocked by the adjacent limit block 511 and cannot continue to move, that is, the blocking frame 6 slides with the connecting frame 7, and at the same time the sixth elastic member 509 is compressed, so that the connecting frame 7 drives the first extrusion block 402 to bypass the adjacent second block 303, and the third elastic member 401 drives the second block 303 to reset and disengage. The limiting position of the first clamping block 301 allows the cam 206 to squeeze the corresponding sliding frame 202 and make the sliding frame 202 slide along the adjacent inner shell 2. When the first extrusion block 402 bypasses the adjacent second clamping block 303, the connecting frame 7 synchronously drives the second extrusion block 510 to squeeze the adjacent docking shaft 508, so that the docking shaft 508 slides along the adjacent piston shaft 502. At the same time, the docking shaft 508 drives the rack frame 504 to slide along the adjacent inner shell 2, so that the rack frame 504 opens the valve on the adjacent storage cylinder 501 through the gear 505, so that the storage cylinder 501 is connected with the inner shell 2. At this time, the docking shaft 508 slides along the piston shaft 502 to the extrusion position of the push block 506.

[0055] When the cam 206 drives the adjacent sliding frame 202 to slide inward along the adjacent inner shell 2, the sliding frame 202 drives the docking shaft 508 to move synchronously through the pushing block 506, and the docking shaft 508 drives the piston shaft 502 to slide along the adjacent storage cylinder 501, pushing the nitrogen inside the storage cylinder 501 into the inner shell 2, and at the same time the fourth elastic member 503 is compressed. When the sliding frame 202 slides outward along the adjacent inner shell 2, the fourth elastic member 503 drives the piston shaft 502 to return and slide, and the piston shaft 502 continuously draws gas from the inner shell 2 in this reciprocating manner, so that the nitrogen in the inner shell 2 is quickly dispersed, and then It can quickly absorb the heat of the battery pack 3 and rapidly reduce the temperature of the battery pack 3. At the same time, nitrogen is an inert gas, which can suppress the probability of fire of the battery pack 3. It can perform emergency treatment on the internally damaged battery pack 3, and send out a network alarm signal when the temperature inside the battery pack 3 is abnormal, immediately terminate the charging operation of the battery pack 3, and send out an alarm signal to remind the staff to replace the damaged battery pack 3. At the same time, the position of the docking shaft 508 is reset, the connection between the storage cylinder 501 and the inner shell 2 is closed, and nitrogen is re-injected into the storage cylinder 501. When the above situation occurs again, repeat the above steps.

[0056] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A safe photovoltaic energy storage cabinet, characterized in that: The invention comprises: an outer shell (1), a plurality of inner shells (2) being fixedly connected to the inner shell (1), a battery pack (3) being detachably fixedly connected to the inner shell (2), a temperature sensor for detecting the battery pack (3), the outer shell (1) being divided into two cavities by the plurality of inner shells (2), a symmetrically distributed heat dissipation fan (4) being arranged outside the outer shell (1), the inner shell (2) being provided with two symmetrically distributed heat dissipation holes (5), the heat dissipation holes (5) being connected to adjacent cavities, the inner shell (2) being slidably connected to two symmetrically distributed blocking frames (6), the blocking frames (6) comprising a plurality of linear arrays. A dry sealing plate, wherein the sealing plate and the heat dissipation holes (5) are staggered, the two blocking frames (6) on the inner shell (2) are jointly provided with a connecting frame (7), the inner shell (2) is fixedly connected with a slide rail (8), an electric slider is slidably connected inside the slide rail (8), the electric slider of the slide rail (8) is fixedly connected with the adjacent connecting frame (7), the electric slider on the slide rail (8) drives the connecting frame (7) to move, so that the blocking frame (6) partially blocks the adjacent heat dissipation holes (5), and the higher the internal temperature of the battery pack (3), the smaller the blocking area of ​​the adjacent heat dissipation holes (5) by the blocking frame (6); A plurality of guide springs (201) in a linear array are fixedly connected to both upper and lower side surfaces of the inner shell (2); a sliding frame (202) is slidably connected to the inner shell (2); the sliding frame (202) is fixedly connected to the middle parts of all the guide springs (201) in the adjacent inner shell (2); and a first elastic member (203) is provided between the inner shell (2) and the sliding frame (202); A plurality of guide fins are fixedly connected to both sides of the guide reed (201); the plurality of guide fins on adjacent sides of two adjacent guide reeds (201) are staggered; the sliding frame (202) slides along the adjacent inner shell (2); the first elastic member (203) is compressed, so that the guide reed (201) gradually transforms from a "S" shape to a "V" shape, thereby extending the heat exchange time between the gas and the battery pack (3); the sliding frame (202) is reset, and the guide reed (201) gradually transforms from a "V" shape to a "S" shape.

2. A safe photovoltaic energy storage cabinet according to claim 1, characterized in that: The outer shell (1) is fixedly connected to a servo motor (204), the output shaft of the servo motor (204) is fixedly connected to a rotating shaft (205), the rotating shaft (205) is fixedly connected to cams (206) of the same number as the inner shell (2), and the cams (206) are used to push adjacent sliding frames (202) to slide along adjacent inner shells (2).

3. A safe photovoltaic energy storage cabinet according to claim 2, characterized in that: The sliding frame (202) is slidably connected to a first clamping block (301), a second elastic member (302) is provided between the sliding frame (202) and an adjacent first clamping block (301), the inner shell (2) is slidably connected to a second clamping block (303), the second clamping block (303) is used to limit and lock an adjacent first clamping block (301), and the cam (206) does not squeeze the adjacent sliding frame (202).

4. A safe photovoltaic energy storage cabinet according to claim 3, characterized in that: A third elastic member (401) is provided between the second clamping block (303) and the adjacent inner shell (2); the connecting frame (7) is fixedly connected to a first extrusion block (402); the first extrusion block (402) is used to push the adjacent second clamping block (303) to move.

5. A safe photovoltaic energy storage cabinet according to claim 4, characterized in that: The inner shell (2) is fixedly connected to and communicates with a storage cylinder (501), the storage cylinder (501) is sealingly and slidably connected to a piston shaft (502), and a fourth elastic member (503) is provided between the storage cylinder (501) and an adjacent piston shaft (502).

6. A safe photovoltaic energy storage cabinet according to claim 5, characterized in that: The inner shell (2) is slidably connected to a rack frame (504), the storage cylinder (501) is provided with a valve, the rotating end of the valve on the storage cylinder (501) is provided with a gear (505), and the rack frame (504) is meshed with an adjacent gear (505).

7. A safe photovoltaic energy storage cabinet according to claim 6, characterized in that: The sliding frame (202) is slidably connected to a push block (506); a fifth elastic member (507) is provided between the sliding frame (202) and the adjacent push block (506); the piston shaft (502) is slidably connected to a docking shaft (508); the docking shaft (508) is limitedly slidably connected to the adjacent rack frame (504); the rack frame (504) slides along the adjacent inner shell (2) so that the rack frame (504) opens the valve on the adjacent storage cylinder (501) through the gear (505); the push block (506) is used to push the adjacent docking shaft (508) to drive the piston shaft (502) to slide along the adjacent storage cylinder (501) so as to push the nitrogen in the storage cylinder (501) into the inner shell (2).

8. A safe photovoltaic energy storage cabinet according to claim 7, characterized in that: The connecting frame (7) is slidably connected to the two adjacent blocking frames (6); a sixth elastic member (509) is provided between the two blocking frames (6) and the adjacent connecting frames (7); the connecting frame (7) is fixedly connected to a second extrusion block (510); the second extrusion block (510) is used to push the adjacent docking shaft (508) to slide along the adjacent piston shaft (502); the inner shell (2) is fixedly connected to a limiting block (511); the limiting block (511) is used to limit the adjacent blocking frames (6).

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