A protective device for photovoltaic energy storage battery

Abstract

The present invention belongs to the technical field of battery protection, and in particular provides a protection device for photovoltaic energy storage batteries. It includes: a shell; a fan, rotatably connected to the shell; a circulation pipe, fixedly connected to the shell, and there is a spiral area on the circulation pipe; a rotating rod, rotatably connected to the shell, and a connecting rope is wound around the rotating rod; a liquid storage tank, fixedly connected to the connecting rope, the liquid storage tank and the circulation pipe are both filled with heat exchange medium, the liquid storage tank is connected to the circulation pipe, the liquid storage tank is located deep in the earth, and is used to exchange heat with the heat exchange medium in the liquid storage tank; a power mechanism is arranged in the shell. The present invention absorbs the "coldness" underground by means of a liquid storage tank arranged underground, thereby transferring the "coldness" to the circulation pipe in the shell, thereby achieving the purpose of cooling the area in the shell, thereby ensuring the working temperature of the energy storage battery and extending the battery life.

Description

Technical Field

[0001] The present invention complies with the technical field of battery protection, and in particular relates to a protection device for a photovoltaic energy storage battery. Background Art

[0002] Common photovoltaic energy storage batteries include ion batteries, lead-acid batteries, etc. They can store the electricity generated by the photovoltaic power generation system, make up for the intermittent characteristics of photovoltaics, and play an important role in large-scale photovoltaic power stations. Since photovoltaic systems are often installed in areas with high sunshine intensity, and energy storage batteries cannot be directly exposed to such environments, it is necessary to protect the energy storage batteries. The existing protection means only use a single shell to protect the energy storage battery. In order to ensure the normal heat dissipation of the energy storage battery, a heat dissipation system driven by a motor is usually provided. When the outside temperature is too high, the wind generated by the single fan is "hot air", which is difficult to effectively cool the energy storage battery, thereby causing the temperature of the energy storage battery to be too high, resulting in a decrease in the performance of the energy storage battery and a shortened service life of the energy storage battery. High temperature can also trigger thermal runaway reactions of the energy storage battery, causing serious safety accidents such as fire and explosion. Summary of the invention

[0003] In order to overcome the shortcomings of existing protection technologies that it is difficult to effectively dissipate heat for energy storage batteries, the temperature of the energy storage batteries is too high, resulting in a decrease in the performance of the energy storage batteries and a shortened service life of the energy storage batteries, the present invention provides a protection device for photovoltaic energy storage batteries.

[0004] The technical solution is: a protective device for photovoltaic energy storage batteries, comprising: a shell; a fan, rotatably connected to the shell; a circulation pipe, fixedly connected in the shell, and a spiral area is present on the circulation pipe; a rotating rod, rotatably connected to the shell, and a connecting rope is wound around the rotating rod; a liquid storage tank, fixedly connected to an end of the connecting rope away from the rotating rod, the liquid storage tank and the circulation pipe are both filled with heat exchange medium, the liquid storage tank is connected to the circulation pipe, the liquid storage tank is located deep in the earth, and is used to exchange heat with the heat exchange medium in the liquid storage tank; a power mechanism is arranged on a side of the shell close to the rotating rod, and the power mechanism is used to make the fan rotate relative to the shell; an auxiliary mechanism is arranged on a side of the shell close to the rotating rod, and is used to assist in driving the fan.

[0005] Preferably, there is a wave area on the circulation pipe to increase its contact area with the air in the shell.

[0006] Preferably, the fan corresponds to the wave area on the circulation pipe.

[0007] Preferably, the power mechanism includes: a motor and a water pump, both of which are installed on one side of the shell close to the rotating rod, the motor has two output shafts, and one of the output shafts on the motor is fixedly connected to the power input end of the water pump, and the water pump cuts off and connects the circulation pipe; a first rod, rotatably connected to the shell, the first rod is connected to the other output shaft on the motor through a one-way bearing, and the first rod is connected to the fan through a pulley belt.

[0008] Preferably, the auxiliary mechanism includes: a fixed frame, fixedly connected to a side of the shell close to the rotating rod, the rotating rod and the first rod are both rotatably connected to the fixed frame; a first gear, fixedly connected to the rotating rod; a second gear, rotatably connected to the fixed frame, the second gear meshing with the first gear; a second rod, rotatably connected to the fixed frame, the second rod and the first rod are connected via a one-way bearing, and the second rod is provided with a ring array of grooves; a limiting rod, slidably connected to the second gear, the groove on the second rod is used to limit the limiting rod, and a first elastic element is fixedly connected between the limiting rod and the second gear; a trigger assembly, provided on a side of the first rod close to the fixed frame, for causing the second rod to drive the first rod to rotate.

[0009] Preferably, the trigger assembly includes: a rotating disk, fixedly connected to a side of the first rod close to the fixed frame; a sliding rod, slidably connected to the rotating disk, and a second elastic element is fixedly connected between the sliding rod and the rotating disk; a sliding shell, limitedly slidably connected to the second gear, and a side close to the limiting rod is truncated, and the truncated cone area is used to squeeze the limiting rod; a rotating ring, limitedly rotatably connected to the sliding shell, and a third elastic element is fixedly connected between the sliding shell and the second gear; an intermediate piece, rotatably connected between the sliding rod and the rotating ring.

[0010] Preferably, the sliding shell is fixedly connected to a friction rod, the rotating rod is fixedly connected to a friction disk, and the friction rod is used to rub the friction disk.

[0011] Preferably, it also includes: a damping shell, fixedly connected to the fixing frame, the damping shell is sealingly and rotatably connected to the rotating rod, and the damping shell is filled with a damping medium; a fixing rod, fixedly connected to the rotating rod, and the fixing rod is located in the damping shell; a first plate, fixedly connected to the fixing rod; and a second plate, fixedly connected to the first plate.

[0012] Preferably, the first plate is an arc-shaped plate, and the center of the circle coincides with the central axis of the rotating rod.

[0013] Preferably, the second plate is an L-shaped plate, having a long side and a short side, wherein the area where the second plate is fixed to the first plate is the short side, and the clamping opening between the second plate and the first plate faces the side away from the fixing rod.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention absorbs the "coldness" of the underground through a liquid storage tank arranged underground, thereby transferring the "coldness" to the circulation pipe in the shell, thereby achieving the purpose of cooling the area in the shell, thereby ensuring the working temperature of the energy storage battery and extending the battery life; the liquid storage tank is moved "underground" under the action of gravity, so that the connecting rope drives the rotating rod to rotate, thereby maintaining the normal rotation of the fan, ensuring the normal heat dissipation of the energy storage battery, and buying time for the arrival of maintenance personnel; the second plate and the first plate are blocked by the damping medium in the damping shell, so that the second plate is deformed, thereby increasing the angle between the second plate and the adjacent tangent of the damping shell in the rotation direction, thereby increasing the resistance of the second plate during rotation, thereby extending the rotation time of the rotating rod, while continuously protecting the energy storage battery, buying time for the arrival of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural cross-sectional view of the housing of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the liquid storage tank of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure when the first rod of the present invention drives the rotating disk to rotate; Figure 5 It is a three-dimensional structural cross-sectional view of the fixing frame and the first gear of the present invention; Figure 6 It is a three-dimensional structural cross-sectional view of the present invention when the first gear drives the second gear to rotate; Figure 7 It is a three-dimensional structural exploded diagram of the fixing frame and the parts thereon of the present invention; Figure 8 It is a three-dimensional structural cross-sectional view of the rotating rod and the damping shell of the present invention.

[0016] In the accompanying drawings: 101, earth, 102, energy storage battery, 1, shell, 2, fan, 3, circulation pipe, 4, rotating rod, 5, connecting rope, 6, liquid storage tank, 701, motor, 702, water pump, 703, first rod, 801, fixed frame, 802, first gear, 803, second gear, 804, second rod, 805, limit rod, 806, first elastic element, 901, rotating disk, 902, sliding rod, 903, second elastic element, 904, sliding shell, 905, rotating ring, 906, third elastic element, 907, middle piece, 908, friction rod, 909, friction disk, 1001, damping shell, 1002, fixed rod, 1003, first plate, 1004, second plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] like Figure 1-Figure 3 As shown, a protective device for photovoltaic energy storage batteries is proposed to solve the problem that the existing protective device can only air-cool the energy storage battery 102, which is greatly affected by the external environment and is difficult to fully cool the energy storage battery 102. In the case of a hot external environment, the energy storage battery 102 cannot even be cooled, so that the temperature of the energy storage battery 102 is too high, resulting in a decrease in the performance of the energy storage battery 102, shortening the service life of the energy storage battery 102, and in severe cases, catching fire and exploding. The protective device comprises: a shell 1, the shell 1 is used to protect the energy storage battery 102 therein; two fans 2, both of which are rotatably connected to the shell 1, and the two fans 2 are connected by a pulley belt; a circulation pipe 3, fixedly connected to the shell 1, and the circulation pipe 3 is There is a spiral area, and there is a wave area on the circulation pipe 3, which is used to increase the contact area between the fan 2 and the air in the shell 1, and the wave areas on the circulation pipe 3 correspond to each other; the rotating rod 4 is rotatably connected to the shell 1, and a connecting rope 5 is wound around the rotating rod 4; the liquid storage tank 6 is fixedly connected to the end of the connecting rope 5 away from the rotating rod 4, and the liquid storage tank 6 and the circulation pipe 3 are both filled with heat exchange medium. The liquid storage tank 6 is connected to the circulation pipe 3. The liquid storage tank 6 is located deep in the earth 101 and is used to exchange heat with the heat-absorbing medium in the liquid storage tank 6; the power mechanism is arranged on the side of the shell 1 close to the rotating rod 4, and the power mechanism is used to make the fan 2 rotate relative to the shell 1; the auxiliary mechanism is arranged on the side of the shell 1 close to the rotating rod 4, and is used to assist in driving the fan 2.

[0019] In the above scheme, a crank is provided on the right side of the rotating rod 4 to facilitate the operation of the staff. The circulation pipe 3 is a U-shaped open pipe as a whole, and both sides of the circulation pipe 3 are located in the liquid storage tank 6 (that is, the circulation pipe 3 and the liquid storage tank 6 form a closed ring "channel"). The initial position of the liquid storage tank 6 is located relatively above the "underground". The wave area on the circulation pipe 3 is a hard pipe, and the wave area on the circulation pipe 3 covers the energy storage battery 102. The spiral area on the circulation pipe 3 is a soft pipe. The heat exchange medium in the liquid storage tank 6 and the circulation pipe 3 is water. When using this device, the staff will The rotating rod 4 is limited, and then the fan 2 is driven to rotate through the power mechanism. After the fan 2 rotates stably, the auxiliary mechanism limits the rotating rod 4, and the staff releases the rotating rod 4. The rotating fan 2 draws in the outside air, so that there is an airflow (from right to left) in the shell 1, so as to dissipate the heat of the energy storage battery 102. At the same time, the "coldness" of the underground is used to cool the water in the liquid storage tank 6, so as to indirectly cool the water in the circulation pipe 3, and finally achieve the purpose of cooling the space in the shell 1, thereby ensuring the working temperature of the energy storage battery 102 and extending the battery life.

[0020] When the power mechanism stops working due to an accident, the auxiliary mechanism starts working, causing the liquid storage tank 6 to start moving downward under the action of gravity, and the liquid storage tank 6 drives the rotating rod 4 to rotate clockwise through the connecting rope 5 (such as Figure 2 Taking the left viewing direction as an example), the fan 2 is then driven to continue working through the auxiliary mechanism to prevent the fan 2 from being unable to work normally and dissipating the heat of the energy storage battery 102 after the power mechanism stops working accidentally, thereby causing the temperature of the energy storage battery 102 to be too high and reducing its service life. In addition, since the liquid storage tank 6 continues to move "underground", the water in the liquid storage tank 6 is increasingly affected by the "underground coldness", which improves the cooling effect on the energy storage battery 102, thereby better protecting the energy storage battery 102.

[0021] like Figure 2 , Figure 4 and Figure 5 As shown, the power mechanism includes: a motor 701 and a water pump 702, both of which are installed on one side of the housing 1 close to the rotating rod 4, the motor 701 has two output shafts, and the output shaft on the left side of the motor 701 is fixedly connected to the power input end of the water pump 702, and the water pump 702 cuts off and connects the circulation pipe 3; a first rod 703, which is rotatably connected to the housing 1, and the first rod 703 is connected to the output shaft on the right side of the motor 701 through a one-way bearing, and the first rod 703 is connected to the fan 2 through a pulley belt.

[0022] In the above solution, when the first rod 703 actively rotates in the counterclockwise direction, it will rotate relative to the adjacent output shaft of the motor 701 under the action of the one-way bearing (such as Figure 4Taking the left view as an example), the output shaft on the left side of the motor 701 is used to drive the water pump 702 to work, so that the circulation pipe 3 and the liquid storage tank 6 form a closed annular "channel" for water circulation, thereby accelerating the cooling rate of the water in the circulation pipe 3 to the area inside the shell 1, thereby improving the heat dissipation effect on the energy storage battery 102, and the output shaft on the right side of the motor 701 is used to drive the first rod 703 to rotate counterclockwise through the adjacent one-way bearing, and the first rod 703 drives the fan 2 to rotate through the pulley belt.

[0023] like Figure 4-Figure 7 As shown, the auxiliary mechanism includes: a fixed frame 801, fixedly connected to a side of the housing 1 close to the rotating rod 4, the rotating rod 4 and the first rod 703 are both rotatably connected to the fixed frame 801; a first gear 802, fixedly connected to the rotating rod 4; a second gear 803, rotatably connected to the fixed frame 801, the second gear 803 meshes with the first gear 802; a second rod 804, rotatably connected to the fixed frame 801, the second rod 804 and the first rod 703 are connected through a one-way bearing, and the second rod 804 is provided with a ring array of grooves; a limiting rod 805, slidably connected to the second gear 803, the groove on the second rod 804 is used to limit the limiting rod 805, and a first elastic element 806 is fixedly connected between the limiting rod 805 and the second gear 803; a trigger assembly, arranged on a side of the first rod 703 close to the fixed frame 801, used to make the second rod 804 drive the first rod 703 to rotate.

[0024] In the above scheme, the transmission ratio between the second gear 803 and the first gear 802 is less than 1, which is used to increase the number of rotations of the fan 2. When the second rod 804 rotates counterclockwise, under the action of the one-way bearing, the second rod 804 will drive the first rod 703 to rotate counterclockwise (such as Figure 5Taking the left view as an example), the first elastic element 806 is a spring and is initially in a compressed state, that is, the limiting rod 805 is initially located in the adjacent groove on the second rod 804. When the motor 701 drives the first rod 703 to rotate counterclockwise, the second rod 804 remains stationary. When the motor 701 stops working due to an accident (the rotating rod 4 starts to rotate clockwise), the rotating rod 4 drives the first gear 802 to rotate clockwise together, the first gear 802 drives the second gear 803 to rotate counterclockwise, and the second gear 803 drives the first rod 703 through the second rod 804 and the limiting rod 805. 3 rotates counterclockwise, and the first rod 703 continues to drive the fan 2 to rotate through the pulley belt, so as to maintain the normal rotation of the fan 2, ensure the normal heat dissipation of the energy storage battery 102, and buy time for the arrival of the maintenance personnel. When the maintenance personnel arrive, they start to repair the motor 701. At this time, the rotating rod 4 continues to rotate clockwise to keep the heat dissipation of the energy storage battery 102. After the maintenance of the motor 701 is completed, the maintenance personnel rotate the rotating rod 4 counterclockwise, the rotating rod 4 reels the connecting rope 5, and the liquid storage tank 6 gradually moves upward to reset until it is completely reset, and then the motor 701 is started.

[0025] like Figure 4-Figure 7 As shown, the trigger assembly includes: a rotating disk 901, fixedly connected to the side of the first rod 703 close to the fixed frame 801; a sliding rod 902, slidably connected to the rotating disk 901, and a second elastic element 903 is fixedly connected between the sliding rod 902 and the rotating disk 901; a sliding shell 904, limited slidingly connected to the second gear 803, and its side close to the limiting rod 805 is truncated, and the truncated cone area is used to squeeze the limiting rod 805; a rotating ring 905, limited rotationally connected to the sliding shell 904, and a third elastic element 906 is fixedly connected between the sliding shell 904 and the second gear 803; an intermediate piece 907, rotatably connected between the sliding rod 902 and the rotating ring 905, the sliding shell 904 is fixedly connected to a friction rod 908, the rotating rod 4 is fixedly connected to a friction disk 909, the friction rod 908 is used to rub the friction disk 909, and the side of the friction rod 908 close to the friction disk 909 is annular and used to contact the friction disk 909.

[0026] In the above scheme, the second elastic element 903 is a tension spring, which is used to reset the sliding rod 902. A convex rod is provided on the upper part of the sliding shell 904 to facilitate the operation of the staff. The diameter of the truncated cone area on the sliding shell 904 gradually increases from left to right. The truncated cone area on the sliding shell 904 is initially in a state of squeezing the limiting rod 805. The third elastic element 906 is a tension spring, which is used to reset the sliding shell 904. When using this device, the staff first limits the rotating rod 4, and then drives the sliding shell 904 to move to the left. The sliding shell 904 drives the friction rod 908 to move to the left, the sliding shell 904 and the second gear 803 slide relative to each other, and the third elastic element 906 is stretched. During the process, the truncated cone area on the sliding shell 904 gradually loses the squeeze on the limit rod 805. The limit rod 805 moves away from the central axis of the second rod 804 under the action of the elastic force of the first elastic element 806 until the limit rod 805 is separated from the adjacent groove on the second rod 804. The sliding shell 904 rotates through the ring 905 and the middle Component 907 presses sliding rod 902 to the left, and sliding rod 902 begins to move away from the central axis of rotating disk 901. Sliding rod 902 and rotating disk 901 slide relative to each other, and second elastic element 903 is stretched until friction rod 908 moves to the left and is in close contact with friction disk 909, thereby ensuring that rotating rod 4 is stationary (i.e., the depth of liquid storage tank 6 and underground remains unchanged), and then motor 701 is started, and first rod 703 begins to rotate counterclockwise, and first rod 703 drives rotating disk 901 to rotate counterclockwise together. The needle rotates, and the rotating disk 901 drives the middle piece 907 to rotate counterclockwise through the sliding rod 902. The middle piece 907 drives the rotating ring 905 to rotate counterclockwise, and the rotating ring 905 and the sliding shell 904 rotate relatively. After the sliding rod 902 rotates stably, the centrifugal force on the sliding rod 902 is equal to the tension generated by the deformation of the second elastic element 903. At this time, the staff releases the convex rod on the sliding shell 904. At this time, the friction rod 908 and the friction disk 909 maintain close contact, that is, the rotating rod 4 is stationary.

[0027] When the motor 701 stops rotating due to an accident, the rotation speed of the rotating disk 901 gradually decreases, and the centrifugal force on the sliding rod 902 gradually decreases (the centrifugal force gradually becomes smaller than the pulling force generated by the deformation of the second elastic element 903), and then the sliding rod 902 begins to move in the direction close to the central axis of the rotating disk 901 under the action of the pulling force of the second elastic element 903, the sliding rod 902 slides relative to the rotating disk 901, the second elastic element 903 gradually returns to its original position, the sliding rod 902 squeezes the sliding shell 904 to the right through the rotating ring 905 and the middle piece 907, the truncated cone area on the sliding shell 904 gradually squeezes the limiting rod 805, the limiting rod 805 slides relative to the second gear 803, the first elastic element 806 is compressed, the limiting rod 805 gradually extends into the adjacent groove on the second rod 804, until the limiting rod 805 returns to its original position, and finally the friction rod 908 loses contact with the friction disk 909, and the liquid storage tank 6 begins to move downward.

[0028] like Figure 4 , Figure 6 and Figure 8 As shown, it also includes: a damping shell 1001, fixedly connected to the fixing frame 801, the damping shell 1001 is sealed and rotatably connected to the rotating rod 4, and the damping shell 1001 is filled with a damping medium; a fixing rod 1002, fixedly connected to the rotating rod 4, and the fixing rod 1002 is located in the damping shell 1001; a first plate 1003, fixedly connected to the fixing rod 1002, the first plate 1003 is an arc-shaped plate, and its center coincides with the central axis of the rotating rod 4; a second plate 1004, fixedly connected to the first plate 1003, the second plate 1004 is an L-shaped plate, the second plate 1004 has a long side and a short side, and the area where it is fixed to the first plate 1003 is the short side, and the clamping opening between the second plate 1004 and the first plate 1003 faces the side away from the fixing rod 1002.

[0029] In the above scheme, the damping medium in the damping shell 1001 is hydraulic oil, the long side of the second plate 1004 is arc-shaped, and its center coincides with the central axis of the rotating rod 4, and the first plate 1003 and the second plate 1004 are both made of spring steel, which is used to bend when subjected to deflection. In the process of clockwise rotation of the rotating rod 4 (such as Figure 6Taking the left view direction as an example), the rotating rod 4 drives the fixed rod 1002 to rotate clockwise, and the fixed rod 1002 drives the second plate 1004 to rotate clockwise through the first plate 1003. Since the direction of the clamp between the second plate 1004 and the first plate 1003 is the same as the rotation direction of the two, the hydraulic oil in the damping shell 1001 will block the second plate 1004 and the first plate 1003, causing the first plate 1003 and the second plate 1004 to bend and deform, thereby increasing the angle between the second plate 1004 and the adjacent tangent of the damping shell 1001 in the rotation direction, thereby increasing the resistance of the second plate 1004 during the rotation process, thereby extending the rotation time of the rotating rod 4, while continuously protecting the energy storage battery 102, buying time for the arrival of maintenance personnel.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A protective device for photovoltaic energy storage batteries, characterized in that: Included are: Housing (1); A fan (2) rotatably connected to the housing (1); A circulation pipe (3) is fixedly connected to the shell (1), and a spiral region is present on the circulation pipe (3); A rotating rod (4) rotatably connected to the housing (1), wherein a connecting rope (5) is wound around the rotating rod (4); a liquid storage tank (6) fixedly connected to an end of the connecting rope (5) away from the rotating rod (4), the liquid storage tank (6) and the circulation pipe (3) both being filled with a heat exchange medium, the liquid storage tank (6) being in communication with the circulation pipe (3), the liquid storage tank (6) being located deep in the earth (101) and being used to exchange heat with the heat exchange medium in the liquid storage tank (6); a power mechanism, arranged on a side of the housing (1) close to the rotating rod (4), the power mechanism being used to cause the fan (2) and the housing (1) to rotate relative to each other; An auxiliary mechanism is arranged on a side of the housing (1) close to the rotating rod (4) and is used to assist in driving the fan (2).

2. A protective device for photovoltaic energy storage batteries according to claim 1, characterized in that: There is a wave area on the circulation pipe (3), which is used to increase the contact area between the circulation pipe and the air in the shell (1).

3. A protective device for photovoltaic energy storage batteries according to claim 2, characterized in that: The fan (2) and the wave area on the circulation pipe (3) correspond to each other.

4. A protective device for photovoltaic energy storage batteries according to claim 3, characterized in that: The power mechanism comprises: The motor (701) and the water pump (702) are both installed on a side of the housing (1) close to the rotating rod (4); the motor (701) has two output shafts, and one of the output shafts on the motor (701) is fixedly connected to the power input end of the water pump (702); the water pump (702) cuts off and connects the circulation pipe (3); The first rod (703) is rotatably connected to the housing (1); the first rod (703) is connected to another output shaft on the motor (701) via a one-way bearing; and the first rod (703) is connected to the fan (2) via a pulley belt.

5. A protective device for photovoltaic energy storage batteries according to claim 4, characterized in that: The auxiliary mechanism includes: A fixed frame (801) fixedly connected to a side of the housing (1) close to the rotating rod (4), wherein the rotating rod (4) and the first rod (703) are both rotatably connected to the fixed frame (801); A first gear (802) fixedly connected to the rotating rod (4); A second gear (803) is rotatably connected to the fixing frame (801), and the second gear (803) is meshed with the first gear (802); A second rod (804) is rotatably connected to the fixing frame (801), the second rod (804) is connected to the first rod (703) via a one-way bearing, and the second rod (804) is provided with an annular array of grooves; a limiting rod (805) slidably connected inside the second gear (803); a groove on the second rod (804) is used to limit the limiting rod (805); and a first elastic element (806) is fixedly connected between the limiting rod (805) and the second gear (803); A trigger assembly is arranged on a side of the first rod (703) close to the fixing frame (801), and is used to enable the second rod (804) to drive the first rod (703) to rotate.

6. A protective device for photovoltaic energy storage batteries according to claim 5, characterized in that: The trigger component includes: A rotating disk (901) fixedly connected to a side of the first rod (703) close to the fixing frame (801); A sliding rod (902) is slidably connected to the rotating disk (901), and a second elastic element (903) is fixedly connected between the sliding rod (902) and the rotating disk (901); A sliding shell (904) is limitedly slidably connected to the second gear (803), and a side thereof close to the limiting rod (805) is truncated cone-shaped, and the truncated cone-shaped area is used to press the limiting rod (805); A rotating ring (905) is connected to the sliding shell (904) in a limited rotation manner, and a third elastic element (906) is fixedly connected between the sliding shell (904) and the second gear (803); The middle piece (907) is rotatably connected between the sliding rod (902) and the rotating ring (905).

7. A protective device for photovoltaic energy storage batteries according to claim 6, characterized in that: The sliding shell (904) is fixedly connected to a friction rod (908), the rotating rod (4) is fixedly connected to a friction disk (909), and the friction rod (908) is used to rub the friction disk (909).

8. A protective device for photovoltaic energy storage batteries according to claim 7, characterized in that: Also included are: A damping shell (1001) is fixedly connected to the fixing frame (801), the damping shell (1001) is sealingly rotatably connected to the rotating rod (4), and the damping shell (1001) is filled with a damping medium; A fixed rod (1002) fixedly connected to the rotating rod (4), the fixed rod (1002) being located inside the damping shell (1001); A first plate (1003) fixedly connected to the fixing rod (1002); The second plate (1004) is fixedly connected to the first plate (1003).

9. A protective device for photovoltaic energy storage batteries according to claim 8, characterized in that: The first plate (1003) is an arc-shaped plate, and the center of the circle coincides with the central axis of the rotating rod (4).

10. A protective device for photovoltaic energy storage batteries according to claim 9, characterized in that: The second plate (1004) is an L-shaped plate. The second plate (1004) has a long side and a short side, and the area where it is fixed to the first plate (1003) is the short side. The clamping opening between the second plate (1004) and the first plate (1003) faces the side away from the fixing rod (1002).

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