An energy storage battery pack

Abstract

The utility model relates to battery technology field discloses a kind of energy storage battery pack, including the casing being equipped with heat dissipation port, power conversion module, the battery module being electrically connected with power conversion module and the heat dissipation device that carries out heat dissipation to power conversion module, battery module and power conversion module are located in casing, heat dissipation device one end is in contact with power conversion module, the other end covers heat dissipation port and is equipped with heat exchange fin, and heat exchange fin protrudes heat dissipation port and contacts with air.The energy storage battery pack, heat generated when conversion power supply works is discharged to the outside of battery pack, and the sealing property is high with good heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an energy storage battery pack. Background Technology

[0002] With the continuous maturation and development of new energy technologies, the demand for energy storage battery packs in the energy storage field is growing rapidly. The power converter, as the core of the battery pack's energy conversion, together with the cell modules and battery management system, constitutes the energy storage battery pack. The heat generated by the power converter during operation requires a cooling system to dissipate it, preventing the cell temperature inside the battery pack from becoming too high. This could trigger the battery management system's power limiting or shutdown protection mechanisms, thus affecting the normal operation and energy output efficiency of the energy storage battery pack.

[0003] For energy storage battery packs with a conversion power of less than 10KW, the heat dissipation solution is mostly air cooling, and the heat dissipation device is usually integrated inside the battery pack. This causes heat to accumulate in the inner cavity of the battery pack shell through air convection, which accelerates the rise in cell temperature. Utility Model Content

[0004] To address the technical problem of poor heat dissipation effect of the aforementioned heat dissipation structure on the power conversion power supply, this utility model provides an energy storage battery pack that can efficiently dissipate heat from the power conversion power supply.

[0005] The specific technical solution of this utility model is as follows: an energy storage battery pack includes a shell with a heat dissipation vent, a power conversion module, a battery module electrically connected to the power conversion module, and a heat dissipation device for dissipating heat from the power conversion module. The battery module and the power conversion module are disposed inside the shell. One end of the heat dissipation device is in contact with the power conversion module, and the other end covers the heat dissipation vent and is provided with heat exchange fins. The heat exchange fins extend out of the heat dissipation vent and are in contact with the air.

[0006] In the aforementioned energy storage battery pack, the heat dissipation device covers the heat dissipation vent to isolate the inner cavity of the casing from the external environment. Heat is conducted to the outside air only through the heat exchange fins extending from the heat dissipation vent. The heat from the power conversion module is transferred to the heat dissipation device and then dissipated into the air outside the casing through the heat exchange fins. Heat will not accumulate inside the battery pack, reducing the risk of internal temperature rise and ensuring the stability of the cell operation. This helps maintain the normal operation and energy output efficiency of the energy storage battery pack.

[0007] Optionally, the heat dissipation device has a heat-conducting block extending towards the power conversion module on one side, and the heat-conducting block is in contact with the heat-generating element on the power conversion module.

[0008] In the above technical solution, the heat-conducting block on the heat dissipation device is precisely attached to the heating element of the power conversion module, which can eliminate contact gaps to reduce thermal resistance, while increasing the heat exchange area with the heating element and the heat dissipation device, accelerating heat dissipation, effectively enhancing the heat exchange effect, and the heat-conducting block can form a fixed support for the power conversion module, realizing the integration of heat dissipation and fixation functions.

[0009] Optionally, the end face of the heat-conducting block facing the power conversion module is a flat contact surface, and the heat-conducting block abuts against the mounting base plate of the power conversion module.

[0010] In the above technical solution, the structure not only increases the contact area between the heat dissipation surface and the heat-conducting plate, but also, through the pressing action of the heat-conducting block, enables the heat-conducting plate to generate a uniform axial fixing force on the power conversion module, thereby enhancing the fixing and support function.

[0011] Optionally, the heat dissipation device includes a heat-conducting plate in contact with the power conversion module and a heat exchange part with heat exchange fins. The heat-conducting plate and the heat exchange part are separately disposed and detachably connected.

[0012] In the above technical solution, since the heat-conducting plate and the heat exchange part have different shapes, the separate arrangement makes it easy to select the appropriate process according to their respective functional requirements and facilitates processing.

[0013] Optionally, thermally conductive silicone is provided between the heat-conducting plate and the heat exchange section.

[0014] In the above technical solution, the thermally conductive silicone can fill the gap between the heat-conducting plate and the heat exchange part, and the thermally conductive particles it contains can build a continuous thermally conductive channel, thereby effectively reducing thermal resistance and improving heat conduction efficiency; at the same time, it has good insulation properties and can prevent electrical conduction.

[0015] Optionally, the heat exchange section covers the heat dissipation port, and the heat exchange section, the heat conduction plate, and the housing are connected by fasteners; or, the heat exchange section covers the heat dissipation port, the heat conduction plate and the housing are connected by fasteners, and the heat exchange section is sandwiched between the heat conduction plate and the power conversion module.

[0016] In the above technical solution, the heat exchange section covers the heat dissipation vents to prevent external moisture and metal foreign objects from entering the battery pack and causing battery failure or short circuit. The heat exchange section, heat conduction plate and shell are connected by fasteners, which strengthens the connection and reduces assembly gaps. The assembly is simple with the heat exchange section and shell connected by fasteners and the heat conduction plate sandwiched in the middle. The heat conduction plate does not need to be fixed separately, but is attached by clamping force, which reduces the processing requirements of the heat conduction plate and facilitates later disassembly and maintenance.

[0017] Optionally, a sealing ring is provided between the heat exchange section and the housing, and the sealing ring covers the edge of the heat dissipation port.

[0018] In the above technical solution, a sealing ring is set to further improve the sealing performance of the battery pack and ensure effective isolation between it and the external environment.

[0019] Optionally, the heat-conducting plate is made of metal, and its contact surface with the power conversion module is coated with thermally conductive silicone.

[0020] In the above technical solution, the heat-conducting plate is made of insulating material, which can avoid the risk of leakage without additional treatment and is simple to process; the heat-conducting plate is made of metal material and is coated with thermally conductive silicone to prevent leakage, and has good heat conduction effect.

[0021] Optionally, a fan is provided outside the housing. The fan is connected to the side of the heat dissipation device away from the power conversion module, and its air outlet is oriented towards the heat exchange fins.

[0022] In the above technical solution, a fan is set to accelerate the airflow on the surface of the heat exchange fins, thereby enhancing the heat dissipation efficiency. Furthermore, the fan is located on the outside of the housing, making it easy to replace and maintain.

[0023] Compared with the prior art, the present invention has at least the following advantages:

[0024] (1) Good heat dissipation effect: The heat-conducting blocks on the heat-conducting plate are precisely attached to the heating elements of the power conversion module. The heat exchange fins of the heat exchange section are located on the outside of the shell. The heat of the power conversion module is transferred to the heat-conducting plate and then dissipated into the air outside the shell through the heat exchange fins. The fan accelerates the air flow on the surface of the heat exchange fins to achieve efficient heat dissipation.

[0025] (2) Good sealing: The heat exchange section covers the heat dissipation port, and a sealing ring is provided between the heat exchange section and the shell. The sealing ring covers the edge of the heat dissipation port so that the inside of the battery pack is sealed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is an exploded view of the structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the heat dissipation device and housing assembly of this utility model.

[0029] The attached figures are labeled as follows: 1. Housing; 2. Heat dissipation device; 21. Heat conduction plate; 22. Heat exchange section; 23. Heat conduction block; 24. Heat exchange fins; 3. Fan; 4. Power conversion module; 5. Sealing ring; 6. Heat dissipation port. Detailed Implementation

[0030] The present invention will be further described below with reference to embodiments. Unless otherwise specified, all devices, connection structures, and methods involved in this invention are known in the art.

[0031] Example 1

[0032] Reference Figures 1 to 3 As shown, this utility model provides an energy storage battery pack, including a housing 1 with a heat dissipation vent 6, a power conversion module 4, a battery module, and a heat dissipation device 2 for dissipating heat from the power conversion module 4. The battery module includes battery cells and other functional units. The battery module and the power conversion module 4 are installed inside the housing 1. The battery module supplies power to the power conversion module 4. The housing 1 has a heat dissipation vent 6. The power conversion module 4 is installed inside the housing 1 at a position corresponding to the heat dissipation vent 6. One end of the heat dissipation device 2 contacts the power conversion module 4, and the other end covers the heat dissipation vent 6 and is provided with heat exchange fins 24. The heat exchange fins 24 extend out of the heat dissipation vent 6 and contact the air. The power conversion module refers to an electronic component that realizes the function of power conversion, including DC / DC modules, AC / DC modules, DC / AC modules, AC / AC modules, etc.

[0033] In the energy storage battery pack, the heat exchange fins 24 of the heat dissipation device 2 extend out of the heat dissipation port 6 of the housing 1, that is, it is placed on the outside of the housing 1. The heat dissipation device 2 covers the heat dissipation port 6 to isolate the inner cavity of the housing 1 from the external environment. Heat is conducted to the outside air only through the heat exchange fins 24 extending out of the heat dissipation port 6. The heat of the power conversion module 4 is transferred to the heat dissipation device 2, and then dissipated into the air outside the housing 1 through the heat exchange fins 24 for heat dissipation. This prevents heat from accumulating inside the battery pack, reduces the risk of the internal temperature of the battery pack rising, ensures the stability of the cell operation, and helps maintain the normal operation and energy output efficiency of the energy storage battery pack.

[0034] like Figure 1 As shown, to further improve heat dissipation efficiency, a fan 3 is provided outside the housing 1. The fan 3 is connected to the side of the heat dissipation device 2 away from the power conversion module 4, and its air outlet is positioned towards the heat exchange fins 24. The heat from the power conversion module 4 is first transferred to the heat dissipation device 2, and then dissipated into the air outside the housing 1 through the heat exchange fins 24. The fan 3 blows air onto the heat exchange fins 24, accelerating the airflow on the surface of the heat exchange fins 24, thereby enhancing heat dissipation efficiency. At the same time, the fan 3 is located on the outside of the housing 1, which also facilitates replacement and maintenance.

[0035] Preferably, the fan 3 is positioned at the center of the heat dissipation device 2 so that the airflow can more evenly cover the entire heat exchange fin area 24.

[0036] like Figure 2 and 3As shown, to further improve heat dissipation efficiency, the heat dissipation device 2 has a heat-conducting block 23 extending towards the power conversion module 4 on its side facing the power conversion module 4. The heat-conducting block 23 is in close contact with a portion of the surface of the heat-generating element on the power conversion module 4. The heat-conducting block 23 on the heat dissipation device 2 precisely contacts the heat-generating element of the power conversion module 4, eliminating contact gaps to reduce thermal resistance. At the same time, it increases the heat exchange area with the heat-generating element and the heat dissipation device 2, accelerating heat dissipation and effectively enhancing the heat exchange effect. Furthermore, the heat-conducting block 23 can provide fixed support for the power conversion module 4, achieving functional integration of heat dissipation and fixation. The heat-generating elements include inverters, transformers, and power semiconductor devices, etc.

[0037] Preferably, the end face of the heat-conducting block 23 facing the power conversion module 4 is a flat contact surface, and the heat-conducting block 23 abuts against the mounting base of the heating element of the power conversion module 4. This structure not only enhances the contact area between the heat dissipation surface and the heat-conducting plate 21, but also, through the pressing action of the heat-conducting block 23, enables the heat-conducting plate 21 to generate a uniform axial fixing force on the power conversion module 4, thereby enhancing the fixing and supporting effect. The flat contact surface refers to a smooth plane formed by planar processing of the surface of the heat-conducting block 23 in contact with the heating element, which can be achieved by mechanical grinding or polishing processes.

[0038] Example 2

[0039] Based on Embodiment 1, this utility model provides an energy storage battery pack, such as Figure 2 and 3 As shown, the heat dissipation device 2 includes a heat-conducting plate 21 that contacts the power conversion module 4 and a heat exchange section 22 with heat exchange fins 24. A heat-conducting block 23 is disposed on the side of the heat-conducting plate 21 facing the power conversion module 4. The heat-conducting plate 21 and the heat exchange section 22 are separately disposed and detachably connected. Since the heat-conducting plate 21 and the heat exchange section 22 have different shapes, the separate arrangement facilitates the selection of appropriate processes according to their respective functional requirements and is easy to manufacture.

[0040] Thermally conductive silicone is provided between the heat-conducting plate 21 and the heat exchange part 22 to fill the gap between them. The thermally conductive particles contained therein can form a continuous thermally conductive channel, thereby effectively reducing thermal resistance and improving heat conduction efficiency. At the same time, it has good insulation properties and can prevent electrical conduction.

[0041] In this embodiment, both the heat-conducting plate 21 and the heat exchange section 22 are made of aluminum. The contact surface between the heat-conducting plate 21 and the power conversion module 4 is coated with thermally conductive silicone to prevent leakage and enhance the heat conduction effect. It is understood that the heat-conducting plate 21 can also be made of a material with high thermal conductivity and insulation, such as high thermal conductivity ceramic.

[0042] In another embodiment, the heat-conducting plate 21 is made of copper, and the heat exchange part 22 is made of aluminum. Since the thermal conductivity of the heat-conducting plate 21 is higher than that of the heat exchange part 22, the heat from the power conversion module 4 is first transferred to the heat-conducting plate 21, and then dissipated into the air outside the housing 1 through the heat exchange fins 24. The high thermal conductivity of the heat-conducting plate 21 effectively reduces the thermal resistance between the power conversion module 4 and the heat exchange part 22, accelerating the heat conduction speed. Simultaneously, its excellent thermal conductivity allows for a more uniform distribution of heat during the transfer process, preventing localized heat accumulation, thus enabling more efficient heat dissipation in conjunction with the heat exchange part 22.

[0043] In this embodiment, as Figure 3 As shown, the heat-conducting plate 21 and the heat exchange section 22 have the same size connecting surfaces. The heat exchange section 22 covers the heat dissipation port 6. The heat exchange section 22, the heat-conducting plate 21, and the housing 1 are connected by fasteners and arranged from the inside out in the order of heat-conducting plate 21, heat exchange section 22, and housing 1. During assembly, the heat-conducting plate 21 is first attached and positioned to the power conversion module 4, then the heat exchange section 22 is aligned with the heat dissipation port 6 and attached to the heat-conducting plate 21, and finally fixed with bolts that pass through all three. The heat exchange section 22 covers the heat dissipation port 6, preventing external moisture and metal foreign objects from entering the battery pack and causing battery failure or short circuit. The connection between the heat exchange section 22, the heat-conducting plate 21, and the housing 1 by fasteners provides a tighter connection and reduces assembly gaps.

[0044] In another embodiment, the connecting end of the heat-conducting plate 21 protrudes circumferentially beyond the edge contour of the heat exchange section 22. The heat-conducting plate 21 is connected to the housing 1 by fasteners. The heat exchange section 22 is sandwiched between the heat-conducting plate 21 and the power conversion module 4, and covers the heat dissipation port 6. This method simplifies assembly, as the heat-conducting plate 21 does not require separate fixing and is held in place by clamping force, reducing the processing requirements for the heat-conducting plate 21 and facilitating subsequent disassembly and maintenance.

[0045] Based on the two connection methods mentioned above, a sealing ring 5 can be further provided between the heat exchange section 22 and the housing 1, and the sealing ring 5 covers the edge of the heat dissipation port 6 to further improve the sealing performance inside the battery pack and ensure effective isolation between it and the external environment.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An energy storage battery pack, characterized in that, The device includes a housing (1) with a heat dissipation vent (6), a power conversion module (4), a battery module electrically connected to the power conversion module (4), and a heat dissipation device (2) for dissipating heat from the power conversion module (4). The battery module and the power conversion module (4) are located inside the housing (1). One end of the heat dissipation device (2) is in contact with the power conversion module (4), and the other end covers the heat dissipation vent (6) and is provided with heat exchange fins (24). The heat exchange fins (24) extend out of the heat dissipation vent (6) and are in contact with the air.

2. The energy storage battery pack according to claim 1, characterized in that, The heat dissipation device (2) has a heat-conducting block (23) extending toward the power conversion module (4) on one side, and the heat-conducting block (23) is in contact with the heating element on the power conversion module (4).

3. The energy storage battery pack according to claim 2, characterized in that, The end face of the heat-conducting block (23) facing the power conversion module (4) is a flat contact surface, and the heat-conducting block (23) abuts against the mounting base of the heating element of the power conversion module (4).

4. The energy storage battery pack according to claim 1, characterized in that, The heat dissipation device (2) includes a heat-conducting plate (21) that contacts the power conversion module (4) and a heat exchange part (22) with heat exchange fins (24). The heat-conducting plate (21) and the heat exchange part (22) are separately arranged and can be detachably connected.

5. The energy storage battery pack according to claim 4, characterized in that, Thermally conductive silicone is provided between the heat-conducting plate (21) and the heat exchange section (22).

6. The energy storage battery pack according to claim 4, characterized in that, The heat exchange section (22) covers the heat dissipation port (6), and the heat exchange section (22), the heat conduction plate (21) and the shell (1) are connected by fasteners; or, the heat exchange section (22) covers the heat dissipation port (6), the heat conduction plate (21) and the shell (1) are connected by fasteners, and the heat exchange section (22) is sandwiched between the heat conduction plate (21) and the power conversion module (4).

7. The energy storage battery pack according to claim 6, characterized in that, A sealing ring (5) is provided between the heat exchange part (22) and the shell (1), and the sealing ring (5) covers the edge of the heat dissipation port (6).

8. The energy storage battery pack according to claim 4, characterized in that, The heat-conducting plate (21) is made of metal, and its contact surface with the power conversion module (4) is coated with thermally conductive silicone.

9. An energy storage battery pack according to any one of claims 1 to 8, characterized in that, The housing (1) is provided with a fan (3), which is connected to the side of the heat dissipation device (2) away from the power conversion module (4), and its air outlet is set towards the heat exchange fins (24).

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