Intelligent energy storage device based on photovoltaic system

Abstract

The invention relates to the technical field of photovoltaic energy storage, in particular to an intelligent energy storage device based on a photovoltaic system, which comprises an energy storage box, a plurality of batteries are arranged on two sides of an inner cavity of the energy storage box, a protective shell fixedly covers the outer part of the energy storage box, and a phase change heat dissipation assembly is arranged between opposite sides of the batteries. The phase change heat dissipation assembly is used for carrying out normal-temperature heat dissipation on the battery; a water cooling assembly is arranged on the lower portion of the energy storage box. By arranging the intelligent temperature controller composed of the controller, the temperature sensor, the phase change heat dissipation assembly and the water cooling assembly, automatic recognition and switching of heat dissipation modes are achieved, when the temperature of the battery is low, only the phase change heat dissipation material passively absorbs heat, and zero-power-consumption heat dissipation is achieved; when the temperature of the battery exceeds a threshold value, the controller automatically starts the circulating pump to drive the water cooler to work, forced efficient heat dissipation is achieved, and therefore the energy consumption is remarkably reduced while the heat dissipation effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic energy storage technology, and more specifically, to a smart energy storage device based on a photovoltaic system. Background Technology

[0002] Photovoltaic power generation systems are often equipped with energy storage devices to balance power generation and consumption demands. Batteries such as lithium-ion batteries are the core of energy storage devices. They generate heat during charging and discharging. If the heat accumulates and causes the battery temperature to become too high, it will seriously affect the battery performance, shorten its service life, and even cause safety accidents such as thermal runaway.

[0003] A search revealed that publication number (CN119495871A) discloses a smart energy storage device based on a photovoltaic system, comprising an energy storage box, a multi-dimensional liquid-cooled support mechanism, and an air-cooled heat dissipation mechanism. The multi-dimensional liquid-cooled support mechanism includes liquid-cooled partitions that divide the energy storage box into multiple assembly spaces. Liquid-cooled heat exchange pipes are fixedly installed within the liquid-cooled partitions. Perforated support plates are fixedly installed at the bottom of each assembly space, and support filter plates are correspondingly arranged above the perforated support plates. Bottom heat exchange pipes are laid between the perforated support plates and the support filter plates. The air-cooled heat dissipation mechanism includes a flow-guiding base, with ventilation pipes fixedly connected to both sides of the flow-guiding base. This invention, based on a photovoltaic system, reduces heat accumulation during practical applications of the photovoltaic system energy storage device, extends its service life, and improves its operational stability.

[0004] The above-mentioned patent still has shortcomings in actual use: the activation and switching of its heat dissipation mode mainly rely on preset programs or manual control, and cannot adaptively and intelligently adjust according to the real-time and precise temperature changes of the battery. When the battery is only slightly hot, the liquid cooling system may start prematurely or frequently, resulting in energy waste. When the battery temperature rises sharply, the heat dissipation may be delayed due to insufficient system response, which poses a safety hazard.

[0005] Based on this, the present invention discloses a smart energy storage device based on a photovoltaic system. Summary of the Invention

[0006] To address the technical problems mentioned in the background art, where the activation and switching of heat dissipation modes mainly rely on preset programs or manual control, and cannot adaptively and intelligently adjust according to the real-time and precise temperature changes of the battery, the liquid cooling system may start prematurely or frequently when the battery is only slightly heated, resulting in energy waste, while when the battery temperature rises sharply, the system response may be too slow, leading to delayed heat dissipation and potential safety hazards, this invention provides a smart energy storage device based on a photovoltaic system, which includes an energy storage box. Multiple batteries are arranged on both sides of the inner cavity of the energy storage box. The outer fixed cover of the energy storage box is equipped with a protective shell. A phase change heat dissipation component is arranged between the opposite sides of each battery. The phase change heat dissipation component is used to dissipate heat from the battery at room temperature. The lower part of the energy storage box is equipped with a water-cooling component, which is used to dissipate heat from the battery at high temperatures.

[0007] Preferably, the phase change heat dissipation component includes a storage box, the lower part of which is fixedly connected to the middle part of the inner cavity of the energy storage box, and the storage box is located between multiple sets of batteries. Multiple heat dissipation fins are fixedly connected to both sides of the storage box.

[0008] Preferably, each of the heat dissipation fins is fixedly connected to a heat-conducting sheet on the side away from the storage box, and the side of each heat dissipation fin close to the storage box extends into the interior of the storage box. The interior cavity of the storage box is filled with a phase change heat dissipation material, and the side of each heat-conducting sheet away from the heat dissipation fin is respectively attached to the surface of the corresponding battery.

[0009] Preferably, the upper part of the storage box extends through the upper wall of the energy storage box, and a heat dissipation pipe is connected to the upper rear side of the storage box. A heat dissipation vent is fixedly connected to the rear end of the heat dissipation pipe, and a heat dissipation protective net is fixedly connected to the inner cavity of the heat dissipation vent.

[0010] Preferably, the water-cooling assembly includes a water tank, the upper part of which is fixedly connected to the lower part of the energy storage tank. An L-shaped pipe is connected to the rear side of the water tank, and a circulation pump is installed on the upper part of the L-shaped pipe. The circulation pump is connected to the rear side of the energy storage tank through a base. The L-shaped pipe is connected to the inlet of the circulation pump, and a diversion pipe is connected to the outlet of the circulation pump.

[0011] Preferably, the upstream end of the diversion pipe is connected to two delivery pipes via a tee connector, and flow meters are fixedly connected to the surfaces of the two delivery pipes respectively. The downstream ends of the two delivery pipes are connected to vertical delivery pipes respectively, and the opposite sides of the two vertical delivery pipes are connected to inlet pipes via threaded connectors.

[0012] Preferably, each of the liquid inlet pipes penetrates the side wall of the energy storage box, and each of the batteries is provided with a heat dissipation plate at its lower part. The heat dissipation plate has a hollow structure, and a heat insulation sheet is fixedly connected to the lower surface of each heat dissipation plate. Both sides of each heat dissipation plate are fixedly connected to the inner wall of the energy storage box. The inner end of each liquid inlet pipe is connected to the internal cavity of the corresponding heat dissipation plate. Each liquid inlet pipe is equipped with a first one-way valve.

[0013] Preferably, each of the heat sinks has a liquid outlet pipe connected to its rear side, and each liquid outlet pipe is equipped with a second one-way valve. The rear ends of each liquid outlet pipe converge into a main pipe, and the outlet of the main pipe is connected to a radiator.

[0014] Preferably, the lower part of the radiator is fixedly connected to the upper part of the energy storage box, the outlet of the radiator is connected to a return pipe, and the downstream end of the return pipe is connected to the water tank.

[0015] Preferably, a temperature sensor is fixedly connected to the front side of the inner cavity of the energy storage box at the position corresponding to each of the batteries, a buzzer and an alarm light are fixedly connected to the upper part of the protective shell, a box cover is hinged to both sides of the front side of the energy storage box, a controller is fixedly connected to the front side of the box cover, and the temperature sensor, buzzer, alarm light and circulation pump are all electrically connected to the controller.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this intelligent energy storage device based on a photovoltaic system, an intelligent temperature control system consisting of a controller, a temperature sensor, a phase change heat dissipation component, and a water cooling component is set up to realize the automatic identification and switching of heat dissipation mode. When the battery temperature is low, only the phase change heat dissipation material passively absorbs heat to achieve zero-power heat dissipation. When the battery temperature exceeds the threshold, the controller automatically starts the circulation pump to drive the water cooling to work, thereby achieving forced and efficient heat dissipation, thus significantly reducing energy consumption while ensuring heat dissipation effect.

[0017] 2. In this smart energy storage device based on a photovoltaic system, heat is absorbed by directly attaching the heat-conducting sheet to the surface of the battery and then transferred to the phase change heat dissipation material in the storage box through the heat dissipation fins. This achieves close-range and uniform thermal management of the battery. At the same time, the circulating pump drives the coolant to flow through the independent heat dissipation plate at the bottom of each battery, forming a three-dimensional heat dissipation path covering the sides and bottom of the battery, which improves the overall heat dissipation efficiency and uniformity.

[0018] 3. In this smart energy storage device based on a photovoltaic system, the buzzer and alarm light are linked by the controller, which can issue an alarm in time when the temperature is abnormal. At the same time, the one-way valve in the water cooling circuit ensures the one-way flow of coolant, the heat insulation sheet reduces the loss of cold energy, and the radiator is located at the top to facilitate heat exchange and return. These designs together enhance the safety, reliability, stability and ease of maintenance of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall rear view of the present invention; Figure 3 This is a schematic diagram of the controller of the present invention; Figure 4 This is a schematic diagram of the water tank structure of the present invention; Figure 5 This is a schematic diagram showing the structure of the present invention after disassembly. Figure 6 This is a schematic diagram of the energy storage box of the present invention; Figure 7 This is a schematic diagram of the conveying pipe of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the diagram; Figure 9 This is a schematic diagram of the disassembled structure of the present invention; Figure 10 This is a schematic diagram of the phase change heat dissipation material of the present invention; Figure 11 This is a schematic diagram of the storage box of the present invention; Figure 12 For the present invention Figure 11 A magnified structural diagram at point B in the diagram.

[0020] The meanings of the labels in the diagram are as follows: 1. Energy storage box; 2. Battery; 3. Protective shell; 4. Phase change heat dissipation assembly; 41. Storage box; 42. Heat dissipation fins; 43. Thermal conductive sheet; 44. Phase change heat dissipation material; 45. Heat dissipation pipe; 46. Heat dissipation outlet; 47. Heat dissipation protective net; 5. Water cooling assembly; 51. Water tank; 52. L-shaped pipe; 53. Circulation pump; 54. Diverter pipe; 55. T-connector; 56. Delivery pipe; 57. Flow meter; 58. Vertical delivery pipe; 59. Threaded connector; 510. Liquid inlet pipe; 511. Heat dissipation plate; 512. Heat insulation sheet; 513. First check valve; 514. Liquid outlet pipe; 515. Second check valve; 516. Main pipe; 517. Radiator; 518. Return pipe; 6. Temperature sensor; 7. Buzzer; 8. Alarm light; 9. Box cover; 10. Controller. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Existing energy storage device cooling systems operate in relatively fixed modes, making it difficult to make precise and timely adjustments based on the actual battery temperature. This results in low energy utilization efficiency or insufficient heat dissipation capacity under extreme conditions.

[0023] Therefore, this invention provides a smart energy storage device based on a photovoltaic system, see [link]. Figures 1 to 12 As shown, it includes an energy storage box 1, with several batteries 2 installed on both sides of the inner cavity of the energy storage box 1, and a protective shell 3 covering the outside. A phase change heat dissipation component 4 is installed between the battery packs, and a water cooling component 5 is installed at the bottom of the energy storage box 1. A temperature sensor 6 is provided inside the energy storage box 1 for each battery 2. A buzzer 7 and an alarm light 8 are installed on the protective shell 3. A box cover 9 is hinged to the front of the box body, and a controller 10 is installed on the box cover 9. The circuits of the temperature sensor 6, the buzzer 7, the alarm light 8, and the circulation pump 53 are all connected to the controller 10.

[0024] For details, see Figure 10 and Figure 12 As shown, the phase change heat dissipation assembly 4 includes a storage box 41 fixed in the middle of the energy storage box 1, with multiple heat dissipation fins 42 connected to both sides. A heat-conducting sheet 43 that is in contact with the battery 2 is fixed on the outer side of the heat dissipation fins 42, and the inner side extends into the storage box 41. The storage box 41 is filled with a phase change heat dissipation material 44 such as paraffin wax. Its top extends upward out of the energy storage box 1 and is connected to the heat dissipation port 46 on the rear side through a heat dissipation pipe 45. A heat dissipation protective net 47 is installed at the heat dissipation port 46.

[0025] During operation, the heat generated by battery 2 first raises the temperature of the heat-conducting plate 43, which is in close contact with it. The heat is then conducted from the heat-conducting plate 43 to the heat dissipation fins 42, which in turn transfer the heat to the phase change heat dissipation material 44 inside the storage box 41. After absorbing the heat, the phase change heat dissipation material 44 undergoes a phase change and melts from a solid to a liquid state. This process absorbs a large amount of latent heat, thereby effectively limiting the temperature rise of battery 2. At night or in low temperatures, the heat is dissipated to the outside air through the walls of the storage box 41 and the heat dissipation pipes 45, and the phase change heat dissipation material 44 solidifies and regenerates.

[0026] Further, see Figures 1 to 10As shown, the water-cooling assembly 5 includes a water tank 51 fixed below the energy storage tank 1. The water tank 51 is connected to the inlet of the circulation pump 53 through an L-shaped pipe 52. The outlet of the circulation pump 53 is connected to a diversion pipe 54. The diversion pipe 54 is divided into two delivery pipes 56 through a three-way connector 55. A flow meter 57 is installed on the pipes. The pipes are then connected to each liquid inlet pipe 510 through a vertical delivery pipe 58 and a threaded connector 59. The liquid inlet pipe 510 passes through the side wall of the energy storage tank 1 and its end is connected to a hollow heat sink 511 located at the bottom of each battery 2. A first one-way valve 513 is installed on the liquid inlet pipe 510. A heat insulation sheet 512 is located at the bottom of the heat sink 511. The rear side of the heat sink 511 is connected to an outlet pipe 514 equipped with a second one-way valve 515. All outlet pipes 514 converge into the main pipe 516 and are then connected to a radiator 517 fixed on the top of the energy storage tank 1. The radiator 517 is connected to the water tank 51 through a return pipe 518.

[0027] During operation, when the temperature of one or more batteries 2 exceeds the first threshold set by the controller 10, for example, 35°C, the controller 10 issues a command to start the circulation pump 53. The circulation pump 53 drives the coolant in the water tank 51 to flow sequentially through the L-shaped pipe 52, the pump body, the branch pipe 54, the delivery pipe 56, the vertical delivery pipe 58, and the inlet pipe 510. Under the guidance of the first one-way valve 513, the coolant enters the internal flow channel of each heat sink 511. The coolant flows in the flow channel, carrying away the heat transferred from the battery 2 through the heat sink 511, and becomes high-temperature coolant. Under the guidance of the second one-way valve 515, the high-temperature coolant is pumped to the top radiator 517 through the outlet pipe 514 and the main pipe 516. The radiator 517 dissipates the heat in the coolant into the air. After the coolant temperature drops, under the action of gravity and pumping pressure, it flows back to the water tank 51 through the return pipe 518, completing one cooling cycle.

[0028] Among them, see Figure 1 and Figure 3 As shown, multiple temperature sensors 6 monitor the temperature of battery 2 in real time and transmit the signal to controller 10. Controller 10 has a preset temperature threshold program. When the temperature exceeds the first threshold, controller 10 controls the circuit of circulation pump 53 to start active water cooling. If the temperature continues to rise and exceeds a higher second threshold, such as 50°C, controller 10 determines that the heat dissipation is abnormal and simultaneously controls the circuits of buzzer 7 and alarm light 8 to be turned on, driving buzzer 7 to sound and alarm light 8 to flash, issuing an audible and visual alarm.

[0029] Working Principle: This invention utilizes intelligent temperature control to automatically select and switch between two efficient heat dissipation modes—passive phase-change heat dissipation and active water-cooling—based on the real-time temperature of battery 2. This achieves a balance between energy saving and efficient heat dissipation. When the photovoltaic system is in normal operation or under low load, the heat generation rate of battery 2 is low, and the temperature is within a safe range, for example, below the first threshold set by controller 10, such as 35°C. In this mode, the system operates in passive heat dissipation mode. At this time, controller 10 does not send a start command to the circulation pump 53 of the water-cooling component 5, and the water-cooling system remains off. The heat generated by battery 2 during operation is directly transferred through its outer casing to the tightly fitted heat-conducting plate 43. The heat is then conducted from the heat-conducting plate 43 to the integrated heat dissipation fins 42. Since the other end of the heat dissipation fins 42 extends into the storage tank 41 and is immersed in the phase change heat dissipation material 44, the heat is rapidly transferred into the phase change heat dissipation material 44. The phase change heat dissipation material 44 is typically a paraffin or salt composite material with a specific phase change temperature. After absorbing this heat, a phase change process occurs from solid to liquid. This process absorbs a large amount of latent heat at approximately isothermal conditions, thus efficiently dissipating the heat generated by battery 2. Heat is stored to effectively suppress the temperature rise of battery 2. The heat is released naturally. When the ambient temperature drops or the equipment stops operating, such as at night, the temperature of the storage tank 41 and the heat dissipation fins 42 gradually exceeds the ambient temperature. At this time, the stored heat is slowly released into the outside air through the walls of the storage tank 41 and the specially designed heat dissipation pipes 45 and heat dissipation vents 46, via natural convection and thermal radiation. The heat dissipation protection net 47 prevents foreign objects from entering. As heat is released, the phase change heat dissipation material 44 solidifies from a liquid state back to a solid state, completing a heat absorption-release cycle and preparing for the next heat dissipation. The entire process requires no electrical energy, relying entirely on physical heat conduction and phase change principles to achieve continuous temperature control with zero power consumption. When the battery 2 experiences a temperature rise due to continuous high-current charging and discharging, excessively high ambient temperature, or other abnormalities, and this temperature rise is detected by the temperature sensor 6 as exceeding a first threshold, such as 35°C, the system switches to active cooling mode. The temperature sensor 6 transmits the real-time temperature signal to the controller 10. The logic judgment unit inside the controller 10 compares the received signal with a preset threshold. Once it confirms that the temperature exceeds the specified value, it immediately sends a start signal to the drive circuit of the circulation pump 53. Upon receiving the instruction from the controller 10, the circulation pump 53 starts, becoming the power source for the entire water cooling cycle. It drives the coolant in the water tank 51 to flow out. The coolant flows sequentially through L-shaped pipe 52, circulation pump 53, and branch pipe 54. At the T-junction 55 at the end of branch pipe 54, the flow is split into two paths, entering left and right delivery pipes 56. Flow meter 57 is used to monitor whether the flow rate of each branch is balanced. Subsequently, the coolant flows into vertical delivery pipe 58 and enters each branch inlet pipe 510 through threaded connector 59. First check valve 513 ensures that the coolant can only flow into the heat sink 511 in the forward direction. The coolant enters the internal flow channel of the hollow heat sink 511 located directly below each battery 2 from the inlet pipe 510.The heat generated at the bottom of battery 2 is directly conducted to the upper wall of heat sink 511. The flowing coolant undergoes forced convection heat exchange with the channel wall, rapidly carrying away the heat. The heat insulation sheet 512 effectively reduces unnecessary downward loss of coolant from heat sink 511. The coolant, whose temperature rises after absorbing heat, flows out of the outlet pipe 514 on the rear side of each heat sink 511, exits through the second one-way valve 515 to prevent backflow, and merges into the main pipe 516. The high-temperature coolant is pumped to the radiator 517 fixed on the top of the energy storage tank 1. The radiator 517, through its large-area fin structure, efficiently exchanges heat with the outside air, dissipating the heat carried by the coolant into the atmosphere. The cooled liquid, with its lower temperature, flows out from the outlet of radiator 517, through the return pipe 518, and returns to the water tank 51 under the assistance of gravity and the pump's suction, completing a complete cooling cycle. The circulation pump 53 continues to work, maintaining this forced cycle until the temperature of battery 2 is controlled below the set value, in the power component. Driven by the circulating pump 53, the coolant is forced to circulate, achieving high-intensity, fast-response heat dissipation through large-area contact and forced convection. The controller 10 also has a higher second temperature threshold, such as 50°C, as a safety alarm line. If, after water cooling is activated, the temperature of battery 2, as indicated by temperature sensor 6, continues to rise and exceeds the specified value, the controller 10 will determine that the heat dissipation performance is insufficient or a malfunction has occurred. At this time, the controller 10 will simultaneously send alarm signals to the circuits of buzzer 7 and alarm light 8. Buzzer 7 will be driven to emit a continuous sound, and alarm light 8 will be driven to flash red, forming a strong audible and visual alarm, promptly reminding on-site maintenance personnel to intervene and handle the situation immediately, thus providing dual safety protection.

[0030] In summary, this invention achieves efficient, energy-saving, and safe management of battery heat by combining phase-change passive heat dissipation, which is intelligently controlled by a controller and operates in stages, with water-cooled active heat dissipation. This effectively solves the technical problems of rigid heat dissipation modes, untimely response, and high energy consumption in existing energy storage devices.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart energy storage device based on a photovoltaic system, comprising an energy storage box (1), characterized in that, Multiple batteries (2) are arranged on both sides of the inner cavity of the energy storage box (1). The outer fixed cover of the energy storage box (1) is provided with a protective shell (3). A phase change heat dissipation component (4) is arranged between the opposite sides of each battery (2). The phase change heat dissipation component (4) is used to dissipate heat from the battery (2) at room temperature. The lower part of the energy storage box (1) is provided with a water cooling component (5), which is used to dissipate heat from the battery (2) at high temperatures.

2. The intelligent energy storage device based on a photovoltaic system according to claim 1, characterized in that, The phase change heat dissipation assembly (4) includes a storage box (41), the lower part of which is fixedly connected to the middle part of the inner cavity of the energy storage box (1), and the storage box (41) is located between multiple sets of batteries (2). Multiple heat dissipation fins (42) are fixedly connected to both sides of the storage box (41).

3. The intelligent energy storage device based on a photovoltaic system according to claim 2, characterized in that, Each of the heat dissipation fins (42) is fixedly connected to a heat-conducting plate (43) on the side away from the storage box (41). The side of each heat dissipation fin (42) close to the storage box (41) extends into the interior of the storage box (41). The interior cavity of the storage box (41) is filled with a phase change heat dissipation material (44). The side of each heat-conducting plate (43) away from the heat dissipation fins (42) is in contact with the surface of the corresponding battery (2).

4. A smart energy storage device based on a photovoltaic system according to claim 3, characterized in that, The upper part of the storage box (41) penetrates the upper wall of the energy storage box (1). The upper part of the rear side of the storage box (41) is connected to a heat dissipation pipe (45). The rear end of the heat dissipation pipe (45) is fixedly connected to a heat dissipation port (46). The inner cavity of the heat dissipation port (46) is fixedly connected to a heat dissipation protective net (47).

5. A smart energy storage device based on a photovoltaic system according to any one of claims 1 to 4, characterized in that, The water-cooling assembly (5) includes a water tank (51), the upper part of which is fixedly connected to the lower part of the energy storage tank (1). An L-shaped pipe (52) is connected to the rear side of the water tank (51). A circulation pump (53) is installed on the upper part of the L-shaped pipe (52). The circulation pump (53) is connected to the rear side of the energy storage tank (1) through a base. The L-shaped pipe (52) is connected to the inlet of the circulation pump (53). A diversion pipe (54) is connected to the outlet of the circulation pump (53).

6. A smart energy storage device based on a photovoltaic system according to claim 5, characterized in that, The upstream end of the diversion pipe (54) is connected to two delivery pipes (56) through a three-way connector (55). Flow meters (57) are fixedly connected to the surfaces of the two delivery pipes (56). The downstream ends of the two delivery pipes (56) are connected to vertical delivery pipes (58). The opposite sides of the two vertical delivery pipes (58) are connected to inlet pipes (510) through threaded connectors (59).

7. A smart energy storage device based on a photovoltaic system according to claim 6, characterized in that, Each of the liquid inlet pipes (510) passes through the side wall of the energy storage box (1). Each of the batteries (2) is provided with a heat sink (511) at its lower part. The heat sink (511) has a hollow structure. A heat insulation sheet (512) is fixedly connected to the lower surface of each heat sink (511). Both sides of each heat sink (511) are fixedly connected to the inner wall of the energy storage box (1). The inner end of each liquid inlet pipe (510) is connected to the internal cavity of the corresponding heat sink (511). Each liquid inlet pipe (510) is equipped with a first one-way valve (513).

8. A smart energy storage device based on a photovoltaic system according to claim 7, characterized in that, Each of the heat sinks (511) has a liquid outlet pipe (514) connected to its rear side. Each of the liquid outlet pipes (514) is equipped with a second one-way valve (515). The rear ends of each of the liquid outlet pipes (514) converge into a main pipe (516). The outlet of the main pipe (516) is connected to a radiator (517).

9. A smart energy storage device based on a photovoltaic system according to claim 8, characterized in that, The lower part of the radiator (517) is fixedly connected to the upper part of the energy storage box (1), and the outlet of the radiator (517) is connected to a return pipe (518). The downstream end of the return pipe (518) is connected to the water tank (51).

10. A smart energy storage device based on a photovoltaic system according to claim 1, characterized in that, Temperature sensors (6) are fixedly connected to the front side of the inner cavity of the energy storage box (1) at positions corresponding to each of the batteries (2). A buzzer (7) and an alarm light (8) are fixedly connected to the upper part of the protective shell (3). Box covers (9) are hinged to both sides of the front side of the energy storage box (1). A controller (10) is fixedly connected to the front side of the box cover (9). The temperature sensors (6), buzzer (7), alarm light (8), and circulation pump (53) are all electrically connected to the controller (10).

Images