A protective device for a photovoltaic energy storage battery

Abstract

The present invention belongs to the technical field of battery protection, and particularly provides a protection device for a photovoltaic energy storage battery. It includes: a housing; a fan rotatably connected to the housing; a circulation pipe fixedly connected to the housing, and there is a spiral area on the circulation pipe; a rotating rod rotatably connected to the housing, and a connecting rope is wound around the rotating rod; a liquid storage tank fixedly connected to the connecting rope, heat exchange media are filled in both the liquid storage tank and the circulation pipe, the liquid storage tank is communicated with the circulation pipe, and the liquid storage tank is located deep in the ground for exchanging heat with the heat exchange medium in the liquid storage tank; a power mechanism is arranged in the housing. By means of the liquid storage tank arranged underground to absorb the "coldness" underground, the "coldness" is transferred to the circulation pipe in the housing, so as to achieve the purpose of cooling the area in the housing, thereby ensuring the working temperature of the energy storage battery and prolonging the battery life.

Description

Technical Field

[0001] The present invention pertains to the technical field of battery protection, and particularly relates to a protection device for photovoltaic energy storage batteries. Background Art

[0002] Common photovoltaic energy storage batteries include ion batteries, lead-acid batteries, etc. They can store the electric energy generated by photovoltaic power generation systems, making up for the intermittent characteristics of photovoltaics and playing an important role in large-scale photovoltaic power stations. Since photovoltaic systems are often set in areas with high sunlight intensity, and energy storage batteries cannot be directly exposed to such environments, it is necessary to protect the energy storage batteries. Existing protection means only use a single housing to protect the energy storage batteries. To ensure the normal heat dissipation of the energy storage batteries, a heat dissipation system driven by a motor and a fan is usually set up. When the external temperature is too high, the wind generated by the single fan working is "hot wind", which is difficult to effectively cool the energy storage batteries, resulting in too high a temperature of the energy storage batteries, leading to a decline in the performance of the energy storage batteries, shortening the service life of the energy storage batteries. High temperature will also trigger a thermal runaway reaction of the energy storage batteries, causing serious safety accidents such as fire and explosion. Summary of the Invention

[0003] In order to overcome the shortcomings that the existing protection technology is difficult to effectively dissipate heat from the energy storage batteries, resulting in too high a temperature of the energy storage batteries, leading to a decline in the performance of the energy storage batteries and shortening the 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 protection device for photovoltaic energy storage batteries, comprising: a housing; a fan rotatably connected to the housing; a circulation pipe fixedly connected inside the housing, and there is a spiral region on the circulation pipe; a rotating rod rotatably connected to the housing, and a connecting rope is wound around the rotating rod; a liquid storage tank fixedly connected to the end of the connecting rope away from the rotating rod, and a heat exchange medium is filled in both the liquid storage tank and the circulation pipe. The liquid storage tank is communicated with the circulation pipe, and the liquid storage tank is located deep in the ground for heat exchange of the heat exchange medium in the liquid storage tank; a power mechanism is arranged on one side of the housing close to the rotating rod, and the power mechanism is used to make the fan rotate relative to the housing; an auxiliary mechanism is arranged on one side of the housing close to the rotating rod for auxiliary driving of the fan.

[0005] Preferably, there is a wave region on the circulation pipe for increasing its contact area with the air inside the housing.

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

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

[0008] Preferably, the auxiliary mechanism includes: a fixing frame, fixedly connected to one side of the housing close to the rotating rod, and both the rotating rod and the first rod are rotatably connected to the fixing frame; a first gear, fixedly connected to the rotating rod; a second gear, rotatably connected to the fixing frame, and the second gear meshes with the first gear; a second rod, rotatably connected to the fixing frame, and the second rod and the first rod are connected by a one-way bearing, and the second rod is provided with annularly arrayed grooves; a limiting rod, slidably connected to the second gear, and the grooves on the second rod are used to limit the limiting rod, and a first elastic element is fixedly connected between the limiting rod and the second gear; a triggering component, arranged on one side of the first rod close to the fixing frame, for causing the second rod to drive the first rod to rotate.

[0009] Preferably, the triggering component includes: a rotating disk, fixedly connected to one side of the first rod close to the fixing 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, limit slidably connected to the second gear, and the side close to the limiting rod is frustum-shaped, and this frustum-shaped area is used to squeeze the limiting rod; a rotating ring, limit rotatably connected to the sliding shell, and a third elastic element is fixedly connected between the sliding shell and the second gear; an intermediate member, rotatably connected between the sliding rod and the rotating ring.

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

[0011] Preferably, it further includes: a damping shell, fixedly connected to the fixing frame, and 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 inside the damping shell; a first plate, fixedly connected to the fixing rod; a second plate, fixedly connected to the first plate.

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

[0013] Preferably, the second plate is an L-shaped plate. The second plate has a long side and a short side, and the area where it is fixedly connected to the first plate is the short side. The clamping opening between the second plate and the first plate faces away from the fixing rod.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention absorbs the "coldness" underground through the liquid storage tank provided underground, and transfers the "coldness" to the circulation pipe in the shell, so as to achieve the purpose of cooling the area in the shell, and then ensure the working temperature of the energy storage battery and extend the battery life; Utilize the liquid storage tank to move "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 and ensuring the normal heat dissipation of the energy storage battery, and winning time for the arrival of maintenance personnel; Through the damping medium in the damping shell to block the second plate and the first plate, the second plate deforms, so as to increase the angle between the second plate and the adjacent tangent of the damping shell in the rotation direction, thereby increasing the resistance during the rotation of the second plate, so as to extend the rotation time of the rotating rod, while continuously protecting the energy storage battery, winning time for the arrival of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the whole of the present invention;

[0016] Figure 2 is a three-dimensional structural sectional view of the shell of the present invention;

[0017] Figure 3 is a three-dimensional structural sectional view of the liquid storage tank of the present invention;

[0018] Figure 4 is a three-dimensional structural schematic diagram when the first rod drives the rotating disc to rotate in the present invention;

[0019] Figure 5 is a three-dimensional structural sectional view of the fixing frame and the first gear in the present invention;

[0020] Figure 6 is a three-dimensional structural sectional view when the first gear drives the second gear to rotate in the present invention;

[0021] Figure 7 is a three-dimensional structural exploded view of the fixing frame and its parts in the present invention;

[0022] Figure 8 is a three-dimensional structural sectional view of the rotating rod and the damping shell in the present invention.

[0023] In the attached drawing reference numerals: 101, the earth; 102, the energy storage battery; 1, the housing; 2, the fan; 3, the circulation pipe; 4, the rotating rod; 5, the connecting rope; 6, the liquid storage tank; 701, the motor; 702, the water pump; 703, the first rod; 801, the fixing bracket; 802, the first gear; 803, the second gear; 804, the second rod; 805, the limiting rod; 806, the first elastic element; 901, the rotating disk; 902, the sliding rod; 903, the second elastic element; 904, the sliding housing; 905, the rotating ring; 906, the third elastic element; 907, the intermediate member; 908, the friction rod; 909, the friction disk; 1001, the damping housing; 1002, the fixing rod; 1003, the first plate; 1004, the second plate. Detailed implementation manners

[0024] 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. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] As Figures 1-3 shown, a protection device for a photovoltaic energy storage battery is proposed to solve the problems that the existing protection device can only perform air cooling on the energy storage battery 102, is greatly affected by the external environment, is difficult to fully cool the energy storage battery 102, and even cannot cool the energy storage battery 102 in a hot external environment, resulting in too high a temperature of the energy storage battery 102, leading to a decline in the performance of the energy storage battery 102, shortening the service life of the energy storage battery 102, and even catching fire and exploding in severe cases. It includes: a housing 1 for protecting the energy storage battery 102 therein; two fans 2, both rotatably connected to the housing 1, and the two fans 2 are connected by a pulley belt; a circulation pipe 3 fixedly connected inside the housing 1, and there are spiral regions and wave regions on the circulation pipe 3 for increasing the contact area with the air inside the housing 1, and the fans 2 correspond to the wave regions on the circulation pipe 3; a rotating rod 4 rotatably connected to the housing 1, and a connecting rope 5 is wound around the rotating rod 4; a liquid storage tank 6 fixedly connected to the end of the connecting rope 5 away from the rotating rod 4, and a heat exchange medium is filled in both the liquid storage tank 6 and the circulation pipe 3, and the liquid storage tank 6 is communicated with the circulation pipe 3, and the liquid storage tank 6 is located deep in the earth 101 for exchanging heat with the heat absorption medium in the liquid storage tank 6; a power mechanism arranged on one side of the housing 1 close to the rotating rod 4 for relatively rotating the fan 2 and the housing 1; an auxiliary mechanism arranged on one side of the housing 1 close to the rotating rod 4 for assisting in driving the fan 2.

[0026] In the above solution, a crank is provided on the right side of the rotating rod 4 for the convenience of operation by the staff. The whole circulation pipe 3 is a U-shaped open pipe, and both sides of the circulation pipe 3 are located inside the liquid storage tank 6 (i.e., the circulation pipe 3 and the liquid storage tank 6 form a closed annular "channel"). The initial position of the liquid storage tank 6 is relatively high in the "underground". The wavy area on the circulation pipe 3 is a rigid pipe, and the wavy area on the circulation pipe 3 encloses the energy storage battery 102. The spiral area on the circulation pipe 3 is a flexible pipe. The heat exchange medium in both the liquid storage tank 6 and the circulation pipe 3 is water. When using this device, the staff limits the rotating rod 4, and then drives the fan 2 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 sucks in the outside air, causing an air flow (from right to left) inside the housing 1, thereby dissipating heat from the energy storage battery 102. At the same time, the "coldness" underground is used to cool the water in the liquid storage tank 6, thereby indirectly cooling the water in the circulation pipe 3, and finally achieving the purpose of cooling the space inside the housing 1, and thus ensuring the working temperature of the energy storage battery 102 and extending the battery life.

[0027] When the power mechanism stops working due to an accident, the auxiliary mechanism starts to work, causing the liquid storage tank 6 to start moving downward under the action of gravity. The liquid storage tank 6 drives the rotating rod 4 to rotate clockwise through the connecting rope 5 (taking the left view direction as an example), and then drives the fan 2 to continue working through the auxiliary mechanism, preventing the fan 2 from being unable to work properly after the power mechanism stops working accidentally, and being unable to dissipate heat from the energy storage battery 102, resulting in too high a temperature of the energy storage battery 102 and reducing its service life. And because the liquid storage tank 6 continues to move "underground", the influence of the "underground coldness" on the water in the liquid storage tank 6 is getting greater and greater, that is, improving the cooling effect on the energy storage battery 102, so as to better protect the energy storage battery 102. Figure 2 As shown in, for example, [drawings not provided in the text], the power mechanism includes: a motor 701 and a water pump 702, both 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. The water pump 702 cuts off and communicates with the circulation pipe 3; a first rod 703, rotatably connected to the housing 1. 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.

[0028] As Figure 2 、 Figure 4 and Figure 5 shown, when the first rod 703 rotates actively in the counterclockwise direction, it will rotate relative to the adjacent output shaft on the motor 701 under the action of the one-way bearing (as

[0029] shown in [drawings not provided in the text]). Figure 4Taking the left view direction as an example, the output shaft on the left side of the motor 701 drives the driving water pump 702 to work, so that the circulating pipe 3 and the liquid storage tank 6 form a water circulation in the closed annular "channel", thereby accelerating the refrigeration rate of the water in the circulating pipe 3 to the area inside the housing 1, and further improving the heat dissipation effect on the energy storage battery 102. The output shaft on the right side of the motor 701 drives 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 belt pulley.

[0030] As Figures 4-7 shown, the auxiliary mechanism includes: a fixed frame 801, fixedly connected to one side of the housing 1 close to the rotating rod 4, and both the rotating rod 4 and the first rod 703 are 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, and the second gear 803 meshes with the first gear 802; a second rod 804, rotatably connected to the fixed frame 801, and the second rod 804 is connected to the first rod 703 through a one-way bearing. The second rod 804 is provided with annularly arranged grooves; a limiting rod 805, slidably connected inside the second gear 803, and the grooves on the second rod 804 are used to limit the limiting rod 805. A first elastic element 806 is fixedly connected between the limiting rod 805 and the second gear 803; a triggering assembly, arranged on one side of the first rod 703 close to the fixed frame 801, for enabling the second rod 804 to drive the first rod 703 to rotate.

[0031] In the above solution, 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 turns of the fan 2 rotating. 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 together (as Figure 5Taking the left view direction as an example, the first elastic element 806 is a spring and is initially in a compressed state, that is, the limit rod 805 is initially located in the adjacent groove on the second rod 804. During the process of the motor 701 driving 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. The second gear 803 drives the first rod 703 to rotate counterclockwise together through the second rod 804 and the limit rod 805. The first rod 703 continues to drive the fan 2 to rotate through the belt pulley and belt, so as to maintain the normal rotation of the fan 2, ensure the normal heat dissipation of the energy storage battery 102, and gain 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, maintaining the state of dissipating heat from the energy storage battery 102. After repairing the motor 701, the maintenance personnel rotate the rotating rod 4 counterclockwise. The rotating rod 4 winds up the connecting rope 5, and the liquid storage tank 6 gradually moves upward and resets. After completely resetting, the motor 701 can be started again.

[0032] As Figures 4-7 shown, the trigger assembly includes: a rotating disk 901, fixedly connected to one 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, limit slidably connected to the second gear 803, and the side close to the limit rod 805 is frustum-shaped, and this frustum-shaped area is used to squeeze the limit rod 805; a rotating ring 905, limit rotatably 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 member 907, rotatably connected between the sliding rod 902 and the rotating ring 905. The sliding shell 904 is fixedly connected with a friction rod 908, and the rotating rod 4 is fixedly connected with a friction disk 909. The friction rod 908 is used to rub against the friction disk 909. The side of the friction rod 908 close to the friction disk 909 is annular and is used to contact the friction disk 909.

[0033] In the above solution, 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 housing 904 for easy operation by the staff. The diameter of the frustum-shaped area on the sliding housing 904 gradually increases from left to right. The frustum-shaped area on the sliding housing 904 is initially in a state of squeezing the limit rod 805. The third elastic element 906 is a tension spring, which is used to reset the sliding housing 904. When using this device, the staff first limits the rotating rod 4, and then drives the sliding housing 904 to move leftward. The sliding housing 904 drives the friction rod 908 to move leftward together. The sliding housing 904 and the second gear 803 undergo relative sliding, and the third elastic element 906 is stretched. During this process, the frustum-shaped area on the sliding housing 904 gradually loses the extrusion on the limit rod 805. The limit rod 805 moves in a direction 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 disengages from the adjacent groove on the second rod 804. The sliding housing 904 squeezes the sliding rod 902 leftward through the rotating ring 905 and the intermediate member 907, and the sliding rod 902 begins to move in a direction away from the central axis of the rotating disk 901. The sliding rod 902 and the rotating disk 901 undergo relative sliding, and the second elastic element 903 is stretched until the friction rod 908 moves leftward to be in close contact with the friction disk 909, so as to ensure that the rotating rod 4 is stationary (i.e., the depth of the liquid storage tank 6 in the ground remains unchanged). Then, the motor 701 is started, and the first rod 703 begins to rotate counterclockwise. The first rod 703 drives the rotating disk 901 to rotate counterclockwise together. The rotating disk 901 drives the intermediate member 907 to rotate counterclockwise through the sliding rod 902. The intermediate member 907 drives the rotating ring 905 to rotate counterclockwise together. The rotating ring 905 and the sliding housing 904 undergo relative rotation. After the sliding rod 902 rotates stably, the centrifugal force received by the sliding rod 902 is equal to the tensile force generated by the deformation of the second elastic element 903. At this time, the staff releases the convex rod on the sliding housing 904. At this time, the friction rod 908 remains in close contact with the friction disk 909, that is, the rotating rod 4 is stationary.

[0034] When the motor 701 stops rotating unexpectedly, 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 less than the tensile force generated by the deformation of the second elastic element 903). Then, under the action of the tensile force of the second elastic element 903, the sliding rod 902 starts to move towards the central axis of the rotating disk 901. The sliding rod 902 and the rotating disk 901 slide relative to each other, and the second elastic element 903 gradually returns to its original position. The sliding rod 902 squeezes the sliding housing 904 to the right through the rotating ring 905 and the intermediate member 907. The frustum-shaped area on the sliding housing 904 gradually squeezes the limiting rod 805. The limiting rod 805 and the second gear 803 slide relative to each other, the first elastic element 806 is compressed, and 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. Finally, the friction rod 908 and the friction disk 909 lose contact, and the liquid storage tank 6 starts to move downward.

[0035] As Figure 4 , Figure 6 and Figure 8 shown, it further includes: a damping housing 1001, fixedly connected to the fixing frame 801. The damping housing 1001 is rotationally and sealingly connected to the rotating rod 4. The damping housing 1001 is filled with a damping medium; a fixing rod 1002, fixedly connected to the rotating rod 4. The fixing rod 1002 is located inside the damping housing 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 fixedly connected to the first plate 1003 is the short side. The clamping opening between the second plate 1004 and the first plate 1003 faces away from the fixing rod 1002.

[0036] In the above solution, the damping medium in the damping housing 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. Both the first plate 1003 and the second plate 1004 are made of spring steel and are used to bend when subjected to deflection. During the clockwise rotation of the rotating rod 4 (as Figure 6Taking the left view direction as an example, the rotating rod 4 drives the fixed rod 1002 to rotate clockwise together. The fixed rod 1002 drives the second plate 1004 to rotate clockwise together through the first plate 1003. Since the orientation of the clamping opening between the second plate 1004 and the first plate 1003 is the same as their rotation direction, 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 undergo bending deformation, thereby increasing the angle between the second plate 1004 and the adjacent tangent of the damping shell 1001 in the rotation direction, thus increasing the resistance during the rotation of the second plate 1004, thereby prolonging the rotation time of the rotating rod 4, while continuously protecting the energy storage battery 102 and winning time for the arrival of maintenance personnel.

[0037] It should be noted that in this article, relational terms such as first and second 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

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, arranged on a side of the housing (1) close to the rotating rod (4), and used for auxiliary driving the fan (2); when the power mechanism stops working due to an unexpected situation, 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 through the connecting rope (5), and then drives the fan (2) to continue working through the auxiliary mechanism; 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); a first rod (703) rotatably connected to the housing (1), the first rod (703) being connected to another output shaft on the motor (701) via a one-way bearing, and the first rod (703) being connected to the fan (2) via a pulley belt; 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.

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 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).

5. A protective device for photovoltaic energy storage batteries according to claim 4, 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).

6. A protective device for photovoltaic energy storage batteries according to claim 5, 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).

7. A protective device for photovoltaic energy storage batteries according to claim 6, 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).

8. A protective device for photovoltaic energy storage batteries according to claim 7, 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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