Photovoltaic power generation energy storage battery pack

Abstract

The application discloses a kind of energy storage battery groups for photovoltaic power generation, belong to photovoltaic power generation technical field, a kind of energy storage battery groups for photovoltaic power generation, cooling liquid is circulated in heat exchange pipe by circulating pump and is circulated, preliminary cooling of battery is realized, simultaneously, fan causes external air to enter battery pack shell through air inlet, when air flows through composite heat exchange mechanism, sufficient heat exchange is carried out with cooling liquid, further improve the cooling effect of battery, composite heat exchange mechanism also increases the flow path of air, reduces air flow rate, so that air and heat exchange component have more sufficient contact time, significantly improve the heat dissipation performance of whole equipment, effectively avoid the performance decline, shortened life and other problems caused by overheating of battery, ensure the stable operation of battery pack under various working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and more particularly to an energy storage battery pack for photovoltaic power generation. Background Art

[0002] With the continued growth of global energy demand and the increasing emphasis on environmental protection, the development and utilization of renewable energy has become a key development direction in the world's energy sector. Photovoltaic power generation, as a clean, renewable energy generation method, has attracted widespread attention and rapid development due to its abundant resources, wide distribution, and pollution-free nature. In photovoltaic power generation systems, energy storage batteries are a key component. They store excess electricity generated by the photovoltaic power generation system during periods of sufficient sunlight and release this energy during periods of insufficient sunlight or peak electricity demand to meet load demand, thereby improving the stability and reliability of the photovoltaic power generation system and achieving the rational allocation and effective utilization of electricity.

[0003] However, energy storage battery packs generate significant heat during operation. For one thing, the electrochemical reactions within the battery itself generate heat, especially during charging and discharging, where this thermal effect is most pronounced. Furthermore, battery packs consist of multiple batteries connected in series or parallel, and the connection resistance between the cells and the contact resistance between the cells and the external circuit also generates Joule heating. If this heat cannot be dissipated promptly and effectively, the internal temperature of the battery pack will rise. Temperature has a crucial impact on battery performance and lifespan.

[0004] When the battery temperature is too high, it accelerates the chemical reactions within the battery, causing faster capacity decay and shortening the battery's service life. High temperatures also increase the battery's internal resistance, reducing charge and discharge efficiency and increasing energy loss. Furthermore, excessively high temperatures can trigger thermal runaway, leading to serious safety incidents such as fires and explosions, posing significant risks to personnel and equipment. Conversely, if the battery temperature is too low, the activity of the active materials decreases, increasing the battery's internal resistance, which also affects the battery's charge and discharge performance, reducing its capacity and output power. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] In response to the problems existing in the prior art, the purpose of the present invention is to provide an energy storage battery pack for photovoltaic power generation, which can realize the circulation of coolant in the heat exchange tube through a circulating pump to achieve initial cooling of the battery. At the same time, the fan prompts the outside air to enter the battery pack casing through the air inlet. When the air flows through the composite heat exchange mechanism, it fully exchanges heat with the coolant, further improving the cooling effect of the battery. The composite heat exchange mechanism also increases the air flow path and reduces the air flow rate, so that the air and the heat exchange components have more sufficient contact time, significantly improving the heat dissipation performance of the entire equipment, effectively avoiding the performance degradation and shortened life of the battery due to overheating, and ensuring the stable operation of the battery pack under various working conditions.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A photovoltaic power generation energy storage battery pack includes a battery pack housing, a plurality of evenly distributed batteries are arranged in the battery pack housing, a storage box is fixedly connected to the upper end of the battery pack housing, a circulation pump is installed on the upper end of the storage box, a heat exchange tube is connected to the outer end of the storage box, an air outlet is drilled at the left end of the battery pack housing, a fan is installed in the air outlet, an air inlet is drilled at the right end of the battery pack housing, a filter is fixedly connected to the inner wall of the air inlet, and a plurality of evenly distributed composite heat exchange mechanisms are embedded in the heat exchange tube. The composite heat exchange mechanism is located at By starting the circulation pump and the fan between two adjacent batteries, the coolant in the circulation pump can be circulated in the heat exchange tube, thereby achieving a cooling effect on the battery. Under the action of the fan, the outside air can enter the battery pack casing through the air inlet, and after the air passes through the composite heat exchange mechanism, the heat exchange effect of the composite heat exchange mechanism is improved, thereby further improving the cooling effect on the battery. At the same time, the composite heat exchange mechanism can increase the air flow path and retain the air flow rate, thereby improving the heat dissipation effect of the entire equipment.

[0010] Furthermore, the composite heat exchange mechanism includes a connecting wide tube embedded in the heat exchange tube, the outer end of the connecting wide tube is connected to a plurality of evenly distributed air ducts, an elastic hose is connected inside the connecting wide tube, and a plurality of evenly distributed traction mechanisms are embedded and installed on the outer end of the connecting wide tube, and a magnet ball is fixedly connected inside the elastic hose. Air enters between the connecting wide tube and the elastic hose through the air duct, and is pulled by the traction mechanism to deform the elastic hose, thereby improving the liquid disturbance effect after the coolant passes through the elastic hose, thereby improving the heat exchange effect of the coolant.

[0011] Furthermore, the traction mechanism includes a deformable balloon, the outer end of the deformable balloon is connected to a traction metal wire, the inner wall of the deformable balloon is fixedly connected to a traction ball, and the deformable balloon is embedded with a plurality of evenly distributed magnetic insulation powders. The temperature of the traction metal wire is increased, so that the traction metal wire is stretched, thereby pushing the deformable balloon to move toward the direction close to the elastic hose, so that the elastic hose is compressed. After the deformable balloon expands, the magnetic shielding effect on the traction ball is released, so that the traction ball can be attracted by the magnet ball.

[0012] Furthermore, an observation hole is drilled at the outer end of the battery pack housing, and an observation window is installed on the inner wall of the observation hole. By providing the observation hole and the observation window, it is convenient for technicians to observe the batteries in the battery pack housing.

[0013] Furthermore, the surfaces of the heat exchange tubes and the connecting wide tubes are provided with a nano-titanium dioxide coating, the coating thickness is 50-100 nm, and the surfaces are coated with the nano-titanium dioxide coating after anodization, and have a photocatalytic self-cleaning function.

[0014] Furthermore, the air duct is connected to the inside of the connecting wide tube, and the air duct is filled with a sponge pad. By setting up the air duct, air can flow between the connecting wide tube and the elastic hose, thereby improving the heat exchange effect of the entire composite heat exchange mechanism.

[0015] Furthermore, the elastic hose is made of silicone rubber material, and a thermally conductive filler is added to the elastic hose. The thermally conductive filler is one or more of aluminum oxide, boron nitride, and silicon carbide. By arranging the elastic hose with silicone rubber and adding the thermally conductive filler therein, the elastic hose can have a strong thermal conductivity effect, so that when air enters the connecting wide tube and the elastic hose, the heat exchange effect can be improved, thereby improving the heat dissipation effect of the battery.

[0016] Furthermore, the traction metal wire is made of a shape memory alloy material, and the equilibrium temperature of the traction metal wire is 40°C. By using a shape memory alloy material to make the traction metal wire, the traction metal wire can be stretched after the temperature rises, thereby pushing the deformable balloon to move toward the elastic hose, so that the elastic hose is compressed, and after the temperature drops, the traction metal wire returns to its original state.

[0017] Furthermore, the traction ball is made of ferritic stainless steel material, and the surface of the traction ball is provided with anti-rust paint. By using ferritic stainless steel material to make the traction ball, the traction ball can be magnetically attracted by the magnet ball, and by providing anti-rust paint on its surface, the traction ball can be less likely to rust during long-term use, thereby increasing the service life of the traction ball.

[0018] Furthermore, the absolute magnetic powder is made of iron-nickel alloy material, and the nickel content in the absolute magnetic powder is 80%. By using iron-nickel alloy material to make the absolute magnetic powder, the magnetic shielding effect on the traction ball can be released after the deformation balloon is expanded, and the traction ball can be attracted by the magnet ball. When the deformation balloon contracts, the traction ball is magnetically shielded again.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. The energy storage battery pack of the present invention uses a circulating pump to drive the coolant to circulate in the heat exchange tubes, achieving initial cooling of the batteries. At the same time, the fan forces outside air to enter the battery pack housing through the air inlet. When the air flows through the composite heat exchange mechanism, it fully exchanges heat with the coolant, further improving the cooling effect on the batteries. The composite heat exchange mechanism also increases the air flow path and reduces the air flow rate, allowing for more sufficient contact time between the air and the heat exchange components, significantly improving the heat dissipation performance of the entire device, effectively avoiding problems such as performance degradation and shortened life of the battery due to overheating, and ensuring the stable operation of the battery pack under various operating conditions.

[0022] 2. In the present invention, air passes through the air duct and enters between the wide connecting tube and the elastic hose. Under the traction of the traction mechanism, the elastic hose deforms. When the coolant flows through the elastic hose, this deformation increases the disturbance effect of the coolant, destroying the laminar flow state of the coolant flow and causing it to form turbulent flow, thereby greatly improving the heat exchange efficiency between the coolant and the surrounding air and the battery, enhancing the heat dissipation effect, and more quickly and effectively removing the heat generated by the battery compared to the traditional single heat exchange method.

[0023] 3. The traction mechanism of the present invention adopts an intelligent design. The traction metal wire is made of a shape memory alloy material. When the temperature rises to the equilibrium temperature (40°C), the traction metal wire stretches, pushing the deformable balloon to move toward the elastic hose, compressing the elastic hose. At the same time, the deformable balloon expands and releases the magnetic shielding effect on the traction ball, causing the traction ball to be attracted by the magnet ball, further changing the shape of the elastic hose and the flow state of the coolant, thereby enhancing the heat exchange effect. When the temperature drops, the traction metal wire returns to its initial state, and the elastic hose also returns to normal. This intelligent adjustment mechanism can automatically adjust the heat dissipation intensity according to the temperature changes inside the battery pack, achieving precise heat dissipation, which not only ensures the heat dissipation effect but also avoids unnecessary energy consumption.

[0024] 4. In the present invention, nano-titanium dioxide coating is provided on the surface of the heat exchange tube and the connecting wide tube, which has a photocatalytic self-cleaning function, can effectively reduce the adhesion of dust and dirt, keep the heat exchange surface clean, improve the heat exchange efficiency, and reduce maintenance costs. The air duct is filled with a sponge pad, which helps to filter and buffer the air, so that the air enters the composite heat exchange mechanism more evenly. The elastic hose is made of silicone rubber material and added with thermal conductive filler. It has good thermal conductivity and elasticity, and can adapt to the deformation requirements of the elastic hose while ensuring the heat dissipation effect. The traction ball is made of ferritic stainless steel and provided with anti-rust paint. The magnetic powder is made of iron-nickel alloy with a specific composition. The selection of these materials fully considers the performance and service life of the components to ensure that the entire battery pack is stable and reliable during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the entire present invention;

[0026] Figure 2 A perspective view of the interior of the cell group housing of the present invention;

[0027] Figure 3 for Figure 2 Schematic diagram of the structure at A in the middle;

[0028] Figure 4 A cross-sectional view of a composite heat dissipation mechanism of the present invention;

[0029] Figure 5 It is a cross-sectional view of the traction mechanism part of the present invention.

[0030] Description of the numbers in the figure:

[0031] 1. Battery pack housing; 101. Observation hole; 2. Battery; 3. Storage box; 4. Circulation pump; 5. Heat exchange tube; 6. Air outlet; 7. Fan; 8. Air inlet; 9. Filter; 10. Composite heat exchange mechanism; 11. Connecting wide tube; 12. Air guide tube; 13. Elastic hose; 14. Traction mechanism; 15. Magnet ball; 16. Deformable balloon; 17. Traction wire; 18. Traction ball; 19. Insulated magnetic powder. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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, not all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0035] Example

[0036] See also Figure 1-2 A photovoltaic power generation energy storage battery pack includes a battery pack shell 1, a plurality of evenly distributed storage batteries 2 are arranged in the battery pack shell 1, a storage box 3 is fixedly connected to the upper end of the battery pack shell 1, a circulation pump 4 is installed on the upper end of the storage box 3, a heat exchange tube 5 is connected to the outer end of the storage box 3, an air outlet 6 is drilled at the left end of the battery pack shell 1, a fan 7 is installed in the air outlet 6, an air inlet 8 is drilled at the right end of the battery pack shell 1, a filter screen 9 is fixedly connected to the inner wall of the air inlet 8, a plurality of evenly distributed composite heat exchange mechanisms 10 are embedded in the heat exchange tube 5, and the composite heat exchange mechanism 10 is located between two adjacent battery packs. Between the batteries 2, by starting the circulation pump 4 and the fan 7, the coolant in the circulation pump 4 can circulate in the heat exchange tube 5, thereby achieving a cooling effect on the battery 2, and under the action of the fan 7, the outside air can enter the battery pack housing 1 through the air inlet 8, and after the air passes through the composite heat exchange mechanism 10, the heat exchange effect of the composite heat exchange mechanism 10 is improved, thereby further improving the cooling effect on the battery 2. At the same time, the composite heat exchange mechanism 10 can increase the air flow path and retain the air flow rate, thereby improving the heat dissipation effect of the entire equipment.

[0037] See also Figure 3-4The composite heat exchange mechanism 10 includes a connecting wide tube 11 embedded in the heat exchange tube 5, the outer end of the connecting wide tube 11 is connected to a plurality of evenly distributed air ducts 12, an elastic hose 13 is connected to the connecting wide tube 11, and a plurality of evenly distributed traction mechanisms 14 are embedded and installed on the outer end of the connecting wide tube 11, and a magnetic ball 15 is fixedly connected to the elastic hose 13. The air enters between the connecting wide tube 11 and the elastic hose 13 through the air duct 12, and is pulled by the traction mechanism 14, causing the elastic hose 13 to deform, thereby improving the liquid disturbance effect after the coolant passes through the elastic hose 13, thereby improving the heat exchange effect of the coolant.

[0038] See also Figure 5 The traction mechanism 14 includes a deformable balloon 16, the outer end of the deformable balloon 16 is connected to a traction metal wire 17, and the inner wall of the deformable balloon 16 is fixedly connected to a traction ball 18. The deformable balloon 16 is embedded with a plurality of evenly distributed magnetic insulation powders 19. The temperature of the traction metal wire 17 increases, causing the traction metal wire 17 to stretch, thereby pushing the deformable balloon 16 to move toward the elastic hose 13, thereby compressing the elastic hose 13. After the deformable balloon 16 expands, the magnetic shielding effect on the traction ball 18 is released, allowing the traction ball 18 to be attracted by the magnet ball 15.

[0039] See also Figure 1-2 An observation hole 101 is opened at the outer end of the battery pack housing 1, and an observation window is installed on the inner wall of the observation hole 101. By setting the observation hole 101 and the observation window, technicians can conveniently observe the battery 2 in the battery pack housing 1. The surface of the heat exchange tube 5 and the connecting wide tube 11 is provided with a nano-titanium dioxide coating with a thickness of 50-100nm. The surface is coated with the nano-titanium dioxide coating after anodization, and has a photocatalytic self-cleaning function.

[0040] See also Figure 3-4 The air duct 12 is connected to the inside of the connecting wide tube 11, and the air duct 12 is filled with a sponge pad. By setting the air duct 12, air can flow between the connecting wide tube 11 and the elastic hose 13, thereby improving the heat exchange effect of the entire composite heat exchange mechanism 10. The elastic hose 13 is made of silicone rubber material, and a thermally conductive filler is added to the elastic hose 13. The thermally conductive filler is one or more of aluminum oxide, boron nitride, and silicon carbide. By setting the elastic hose 13 made of silicone rubber and adding thermally conductive fillers therein, the elastic hose 13 can have a strong thermal conductivity effect, so that when air enters the connecting wide tube 11 and the elastic hose 13, the heat exchange effect can be improved, thereby improving the heat dissipation effect of the battery 2.

[0041] See also Figure 5The traction wire 17 is made of a shape memory alloy material, and the equilibrium temperature of the traction wire 17 is 40°C. By using a shape memory alloy material to make the traction wire 17, the traction wire 17 can be stretched after the temperature rises, thereby pushing the deformation balloon 16 to move toward the direction close to the elastic hose 13, so that the elastic hose 13 is compressed, and after the temperature drops, the traction wire 17 returns to its initial state. The traction ball 18 is made of ferritic stainless steel material, and the surface of the traction ball 18 is provided with anti-rust paint. By using ferritic stainless steel material to make the traction ball 18, The traction ball 18 can be magnetically attracted by the magnet ball 15. By setting anti-rust paint on its surface, the traction ball 18 can be less likely to rust during long-term use, thereby increasing the service life of the traction ball 18. The absolute magnetic powder 19 is made of iron-nickel alloy material. The nickel content in the absolute magnetic powder 19 is 80%. By using iron-nickel alloy material to make the absolute magnetic powder 19, the magnetic shielding effect on the traction ball 18 can be released after the deformable balloon 16 is expanded, and the traction ball 18 can be attracted by the magnet ball 15. When the deformable balloon 16 contracts, the traction ball 18 is magnetically shielded again.

[0042] The above description is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved conception of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A photovoltaic power generation energy storage battery pack, comprising a battery pack housing (1), characterized in that: The battery pack housing (1) is provided with a plurality of evenly distributed storage batteries (2), the upper end of the battery pack housing (1) is fixedly connected to a storage box (3), the upper end of the storage box (3) is installed with a circulation pump (4), the outer end of the storage box (3) is connected to a heat exchange tube (5), the left end of the battery pack housing (1) is provided with an air outlet (6), the air outlet (6) is provided with a fan (7), the right end of the battery pack housing (1) is provided with an air inlet (8), the inner wall of the air inlet (8) is fixedly connected with a filter (9), and the heat exchange tube (5) is embedded with a fan (7). A plurality of evenly distributed composite heat exchange mechanisms (10) are provided, wherein the composite heat exchange mechanism (10) is located between two adjacent storage batteries (2), and the composite heat exchange mechanism (10) comprises a connecting wide tube (11) embedded in a heat exchange tube (5), wherein the outer end of the connecting wide tube (11) is connected to a plurality of evenly distributed air guide tubes (12), an elastic hose (13) is connected inside the connecting wide tube (11), and a plurality of evenly distributed traction mechanisms (14) are embedded and installed at the outer end of the connecting wide tube (11), and a magnetic ball (15) is fixedly connected inside the elastic hose (13).

2. The photovoltaic energy storage battery pack according to claim 1, characterized in that: The traction mechanism (14) comprises a deformable balloon (16), the outer end of the deformable balloon (16) is connected to a traction metal wire (17), the inner wall of the deformable balloon (16) is fixedly connected to a traction ball (18), and a plurality of evenly distributed absolute magnetic powders (19) are embedded in the deformable balloon (16).

3. The photovoltaic energy storage battery pack according to claim 1, characterized in that: An observation hole (101) is drilled at the outer end of the battery pack housing (1), and an observation window is installed on the inner wall of the observation hole (101).

4. The photovoltaic energy storage battery pack according to claim 1, characterized in that: The surfaces of the heat exchange tube (5) and the connecting wide tube (11) are provided with a nano-titanium dioxide coating, and the coating thickness is 50-100 nm.

5. The photovoltaic energy storage battery pack according to claim 1, characterized in that: The air guide pipe (12) is connected to the interior of the connecting wide pipe (11), and the air guide pipe (12) is filled with a sponge pad.

6. The photovoltaic energy storage battery pack according to claim 1, characterized in that: The elastic hose (13) is made of a silicone rubber material, and a heat-conducting filler is added into the elastic hose (13), and the heat-conducting filler is one or more of aluminum oxide, boron nitride, and silicon carbide.

7. The photovoltaic energy storage battery pack according to claim 2, characterized in that: The traction metal wire (17) is made of a shape memory alloy material, and the equilibrium temperature of the traction metal wire (17) is 40°C.

8. The photovoltaic energy storage battery pack according to claim 2, characterized in that: The traction ball (18) is made of ferrite stainless steel material, and the surface of the traction ball (18) is provided with anti-rust paint.

9. The photovoltaic energy storage battery pack according to claim 2, characterized in that: The absolute magnetic powder (19) is made of an iron-nickel alloy material, and the nickel content in the absolute magnetic powder (19) is 80%.

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