Integrated efficient heat dissipation device of photovoltaic energy storage integrated system

Abstract

The invention relates to the field of photovoltaic energy storage, and discloses an integrated efficient heat dissipation device of a photovoltaic energy storage integrated system, the integrated efficient heat dissipation device comprises energy storage batteries and a heat dissipation assembly, the heat dissipation assembly comprises at least two water cooling units and at least two air cooling units, each water cooling unit comprises a cooling plate, the two cooling plates are attached to the side surfaces of the two energy storage batteries, a first cooling pipe is spirally arranged in the cooling plate, the first cooling pipe comprises two rows of single pipes which are arranged in parallel, a heat insulation material is arranged between the two rows of single pipes, and the flow directions of cooling liquid in the two rows of single pipes are opposite; the two air cooling units are symmetrically arranged on the two sides of the energy storage battery, gaps are reserved between the two air cooling units and the energy storage battery, and the air cooling units blow air to dissipate heat of the energy storage battery. The water cooling units are arranged between the adjacent air cooling units and attached to the side faces of the energy storage batteries, and the water cooling units take away heat of the energy storage batteries through flowing of cooling liquid. Therefore, uniform and efficient heat dissipation of the battery is realized.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic energy storage, and more specifically to an integrated high-efficiency heat dissipation device for integrated photovoltaic energy storage systems. Background Technology

[0002] Energy storage batteries, especially lithium-ion batteries, are core components in the integrated high-efficiency heat dissipation devices of photovoltaic energy storage systems. During charging and discharging, they generate a large amount of heat. If the heat cannot be dissipated in a timely and even manner, it will lead to uneven temperature distribution and localized overheating inside the battery pack, resulting in performance degradation, shortened cycle life, and even the safety risk of thermal runaway.

[0003] Existing heat dissipation methods mainly include air cooling and liquid cooling. Air cooling typically uses a fan to blow air onto the battery surface, which is low-cost but has low and uneven heat dissipation efficiency, easily creating temperature gradients within the battery pack. Although liquid cooling is more efficient, traditional liquid cooling systems often use a single-sided or unidirectional cooling channel design, where the coolant flows in from one side of the battery and out from the other. This results in a lower temperature at the end of the battery near the inlet and a higher temperature at the end near the outlet, leading to poor heat dissipation uniformity and an inability to effectively balance the overall temperature field of the battery.

[0004] Therefore, there is an urgent need for a battery thermal management solution that can achieve uniform and efficient heat dissipation to ensure the safe, stable and long-life operation of energy storage systems. Summary of the Invention

[0005] The present invention aims to provide an integrated high-efficiency heat dissipation device for photovoltaic energy storage integrated systems, which can achieve uniform and efficient heat dissipation of batteries.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated high-efficiency heat dissipation device for a photovoltaic energy storage integrated system, comprising an energy storage battery and a heat dissipation component, the heat dissipation component comprising at least two water-cooling units and at least two air-cooling units, the water-cooling unit comprising a cooling plate, the two cooling plates being attached to the sides of the two energy storage batteries, a first cooling pipe being coiled inside the cooling plate, the first cooling pipe comprising two rows of single pipes arranged in parallel, heat insulation material being provided between the two rows of single pipes, and the coolant in the two rows of single pipes flowing in opposite directions; Two air-cooled units are symmetrically arranged on both sides of the energy storage battery with a gap between them. The air-cooled units blow air to dissipate heat from the energy storage battery. The water-cooled units are arranged between the adjacent air-cooled units and attached to the side of the energy storage battery. The water-cooled units remove the heat from the energy storage battery through the flow of coolant. The beneficial effects of this plan are: 1. The first cooling pipe introduces coolant from the opposite direction to ensure that the coolant is evenly distributed across both ends of the battery, achieving good heat dissipation.

[0007] 2. The first cooling pipe can remove heat from the surface of the energy storage battery, but it cannot remove heat from the inside of the energy storage battery in time. Therefore, a gap is set at the position where the energy storage battery is not equipped with a water cooling unit, so that the hot air inside the energy storage battery can be dissipated from that side, and then the air cooling unit drives the airflow to directly remove the heat.

[0008] If water-cooling units are installed around the energy storage battery, the heat will be completely removed through the physical contact of the coolant, while the hot air that is dissipated due to the temperature rise will be blocked by the cooling plate and will have difficulty dissipating.

[0009] If air-cooling units are installed all around the energy storage battery, the airflow will be turbulent and prone to swirling airflow, which will reduce the heat dissipation efficiency.

[0010] This solution combines the cooling effects of water cooling and air cooling, working synergistically to fully utilize contact heat dissipation and heat dissipation, ensuring efficient heat dissipation. Furthermore, since water cooling and air cooling are two separate systems, heat distribution in all directions can be made uniform by adjusting fan speed and coolant flow rate, thus achieving uniform and efficient heat dissipation from the battery.

[0011] Furthermore, the air-cooled unit includes a mounting plate with ventilation holes and several ventilation slots vertically arranged on the side of the mounting plate near the energy storage battery. The ventilation holes and ventilation slots are connected.

[0012] Furthermore, the fixing plate is provided with several diversion holes, which are connected to ventilation holes and ventilation slots. Multiple diversion holes are connected in one ventilation slot.

[0013] Furthermore, a connecting part is formed between adjacent ventilation slots on the fixed plate, and a rubber layer is provided between the connecting part and the energy storage battery.

[0014] Furthermore, the lower ends of adjacent connecting parts are interconnected, and a second cooling pipe is coiled inside the connecting part. After the second cooling pipe coils in a U-shaped loop within a single connecting part, it enters the adjacent connecting part from the lower end of that connecting part.

[0015] Furthermore, the heat dissipation component includes a base, on which a heat-conducting plate is provided, and a third cooling pipe arranged in a spiral pattern is provided inside the heat-conducting plate.

[0016] This solution also has the following effects: 1. Uniform Heat Dissipation: The air-cooling unit uses a shunting design to distribute airflow evenly, uniformly driving airflow along the sides of the energy storage battery. The negative pressure generated by this airflow further drives hot air out of the battery. The first cooling pipe in the water-cooling unit adopts a dual-row counter-flow design, effectively balancing the temperature field along the sides of the battery. Combined with the second cooling pipe at the bottom and the first cooling pipe integrated into the air-cooling unit, this achieves uniform temperature control throughout the battery, significantly extending battery life.

[0017] 2. In the prior art, battery protection is usually achieved by a cooling fan installed in the battery box, but such devices usually lack sufficient protection for the battery, making the battery susceptible to damage when subjected to external physical impacts.

[0018] In this solution, the air-cooled channel, water-cooled pipeline and battery fixing structure (fixing plate, cooling plate) are cleverly integrated to form a modular heat dissipation component. This not only effectively protects the energy storage battery, but also facilitates installation and maintenance in the integrated high-efficiency heat dissipation device of the photovoltaic energy storage system, saving space.

[0019] 3. Although the air-cooled unit mainly dissipates heat through airflow, in order to ensure structural stability and effectively protect the energy storage battery, a rubber layer is placed on the connection part to contact the energy storage battery, preventing relative movement between the air-cooled unit and the energy storage battery, thereby avoiding impact forces; at the same time, ventilation slots are formed between adjacent connection parts to facilitate ventilation and cooling. However, since the connection part and the energy storage battery are in almost direct contact, separated only by a rubber layer, the contact point cannot dissipate heat through airflow. Therefore, a second cooling pipe needs to be installed in the connection part for cooling. To ensure the continuity of the second cooling pipe, the lower end of the connection part is connected so that the second cooling pipe can be coiled between the various connection parts. Attached Figure Description

[0020] Figure 1 This is a top view of Example 1; Figure 2 This is the front view of Example 1; Figure 3 This is a perspective view of the fixing plate in Example 1; Figure 4 This is a schematic diagram of the arrangement of the third cooling pipe inside the heat-conducting plate in Example 1; Figure 5 This is a schematic diagram of the arrangement of the second cooling pipe within the fixed plate in Example 1; Figure 6 This is a schematic diagram of the fan outlet in Example 2. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: base 1, energy storage battery 2, fixing plate 3, second cooling pipe 31, connecting part 32, ventilation slot 33, diversion hole 34, fan 35, structural part 36, cooling plate 4, first cooling pipe 41, heat conduction plate 5, third cooling pipe 51, water inlet connector 52, water outlet connector 53, shell 61, heat dissipation fins 62, connecting seat 63, and rotating shaft 64.

[0022] Example 1 Example 1 is basically as follows Figures 1-5 As shown: The integrated high-efficiency heat dissipation device of the photovoltaic energy storage system includes energy storage battery 2 and heat dissipation components. The heat dissipation components include base 1, two water-cooling units and two air-cooling units. like Figure 2 As shown, support legs are welded to the four corners of the lower surface of the base 1. A heat-conducting plate 5 is bolted to the base 1. A third cooling pipe 51 is arranged in a spiral pattern inside the heat-conducting plate 5, as shown in the figure. Figure 4 As shown, in this embodiment 1, the cooling pipes are all installed in cavities opened inside various plates. Each cooling pipe consists of two rows of parallel single pipes, with thermal insulation material (rock wool) bonded between the two rows of single pipes. The coolant in the two rows of single pipes flows in opposite directions. Figure 4 For illustrative purposes only, the double-row single pipes are represented by a thick line, meaning that at the end of the short cold pipe, there is both an inlet connector 52 and an outlet connector 53, as shown below. Figure 2 As shown.

[0023] like Figure 1 As shown, the energy storage battery 2 is rectangular and placed on the base 1. Both air-cooled units include a fixing plate 3. The two fixing plates 3 are symmetrically arranged on both sides of the energy storage battery 2, with a gap between them. The lower side of the fixing plate 3 is bolted to the base 1 (the upper and lower sides shown in the figure). Ventilation holes are opened on the outer side of the fixing plate 3, and fans 35 are bolted to it. Several vertically arranged connecting parts 32 and horizontally arranged structural parts 36 are integrally formed on the inner side of the fixing plate 3. Figure 3 , Figure 5 As shown, both the connecting part 32 and the structural part 36 are strip-shaped structures. The lower ends of the structural part 36 and all the connecting parts 32 are integrally formed. A rubber layer (not shown in the figure) is filled between the connecting part 32 and the energy storage battery 2.

[0024] A ventilation slot 33 is formed between adjacent connecting parts 32. A plurality of diversion holes 34 are provided within the fixing plate 3. The ventilation slot 33, diversion holes 34, ventilation holes, and fan 35 are sequentially connected. Multiple diversion holes 34 are connected within one ventilation slot 33, and the outlets of the diversion holes 34 are equidistantly arranged within the ventilation slot 33. For example... Figure 5 As shown, a second cooling pipe 31 is coiled inside the connecting part 32. The second cooling pipe 31 coils in a U-shaped loop within a single connecting part 32 and then enters an adjacent connecting part 32 from the lower end of that connecting part 32. The energy storage battery 2 is cooled by blowing air through the fan 35.

[0025] Both water-cooled units include a cooling plate 4, which is disposed between adjacent fixed plates 3 and attached to the side of the energy storage battery 2. The water-cooled unit removes the heat of the energy storage battery 2 through the flow of coolant. A first cooling pipe 41 is arranged coiled inside the cooling plate 4. The lower side of the cooling plate 4 is bolted to both sides of the base 1. The cooling plate 4 and the fixed plate 3 cooperate to enclose the energy storage battery 2 and form protection.

[0026] Example 2 Example 2 is based on Example 1: It is suitable for battery insulation in extremely cold weather, such as... Figure 6 As shown, the fan 35 includes a housing 61, and a polygonal air inlet is provided on the outer side of the housing 61. In this embodiment, the air inlet is hexagonal. The air inlet is divided into 6 regions equally along the central polar axis. A connecting seat 63 is provided at the corner position between adjacent regions. The connecting seat 63 and the housing 61 of the fan 35 are integrally formed.

[0027] Each area is equipped with triangular heat dissipation fins 62. A rotating shaft 64 is integrally formed on the side of the heat dissipation fin 62 away from the center of the hexagon. Both ends of the rotating shaft 64 are inserted into and rotatably connected to connecting seats 63. A torsion spring is welded onto the rotating shaft 64, and the end of the torsion spring is welded to the connecting seat 63. While ensuring that the heat dissipation fins 62 can be flipped, sealing rubber is installed between adjacent heat dissipation fins 62 as needed to improve sealing.

[0028] In the initial state of the torsion spring, the six heat dissipation fins 62 are assembled into a plane to seal the air inlet, thereby achieving a heat preservation effect for the energy storage battery 2 in extremely cold weather; When fan 35 starts running, it creates negative pressure, causing the six heat dissipation fins 62 to overcome the spring force of the torsion spring and rotate inward, thereby opening the air intake for heat dissipation. If the heat dissipation fins cannot rotate inward due to excessive torque, or cannot return to their original position due to insufficient torque, the torque of the torsion spring can be changed by altering the number of coils, wire diameter, and material of the torsion spring.

[0029] The above description is merely Embodiment 1 of the present invention. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An integrated high-efficiency heat dissipation device for a photovoltaic energy storage integrated system, characterized in that: It includes energy storage batteries and heat dissipation components. The heat dissipation components include at least two water-cooling units and at least two air-cooling units. The water-cooling units include cooling plates. The two cooling plates are attached to the sides of the two energy storage batteries. A first cooling pipe is coiled inside the cooling plate. The first cooling pipe includes two rows of single pipes arranged in parallel. Thermal insulation material is provided between the two rows of single pipes. The coolant in the two rows of single pipes flows in opposite directions. Two air-cooled units are symmetrically arranged on both sides of the energy storage battery with a gap between them. The air-cooled units blow air to dissipate heat from the energy storage battery. The water-cooled units are arranged between the adjacent air-cooled units and attached to the side of the energy storage battery. The water-cooled units remove the heat from the energy storage battery through the flow of coolant.

2. The integrated high-efficiency heat dissipation device for the photovoltaic energy storage integrated system according to claim 1, characterized in that: The air-cooled unit includes a mounting plate with ventilation holes. Several ventilation slots are vertically arranged on the side of the mounting plate near the energy storage battery, and the ventilation holes and ventilation slots are connected.

3. The integrated high-efficiency heat dissipation device for the photovoltaic energy storage integrated system according to claim 2, characterized in that: The fixed plate has several diversion holes, which connect to the ventilation holes and the ventilation slots. Multiple diversion holes are connected in one ventilation slot.

4. The integrated high-efficiency heat dissipation device for the photovoltaic energy storage integrated system according to claim 3, characterized in that: The portion between adjacent ventilation slots on the fixed plate forms a connecting part, and a rubber layer is provided between the connecting part and the energy storage battery.

5. The integrated high-efficiency heat dissipation device for the photovoltaic energy storage integrated system according to claim 4, characterized in that: The lower ends of adjacent connecting parts are interconnected, and a second cooling pipe is coiled inside the connecting part. After the second cooling pipe coils in a U-shaped loop in a single connecting part, it enters the adjacent connecting part from the lower end of the connecting part.

6. The integrated high-efficiency heat dissipation device for the photovoltaic energy storage integrated system according to claim 5, characterized in that: The heat dissipation assembly includes a base, on which a heat-conducting plate is provided, and a third cooling pipe arranged in a spiral pattern is provided inside the heat-conducting plate.

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