Heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction

Abstract

The invention discloses a heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction, and belongs to the technical field of energy storage battery boxes, the heat dissipation type photovoltaic energy storage battery box comprises a direct cooling plate, the front end of the direct cooling plate is fixedly connected with a front frame beam, the rear end of the direct cooling plate is fixedly connected with a rear frame beam, the left side of the direct cooling plate is fixedly connected with a left frame beam, and the right side of the direct cooling plate is fixedly connected with a right frame beam. The right side of the direct cooling plate is fixedly connected with a front frame beam, the right side of the direct cooling plate is fixedly connected with a right frame beam, the front end of the direct cooling plate is fixedly connected with a first support, the first support is fixedly connected with the front frame beam, a second support is fixedly connected above the direct cooling plate, and the front end of the second support is fixedly connected with the first support. The rear end of the second support is fixedly connected with the rear frame beam. According to the structure, light weight, high integration level and high heat exchange efficiency of the box body can be guaranteed, compared with a conventional energy storage box body, the structure is simpler, the space utilization rate is high, the temperature uniformity is good, the heat exchange efficiency is higher, battery loss is reduced, and meanwhile the safety coefficient is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery boxes, and in particular to a heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction. Background Art

[0002] The energy storage battery box is a key component of the energy storage system. The technical progress in its design, material selection, structural optimization, thermal management and safety performance has a crucial impact on the performance of the entire energy storage system. In recent years, with the rapid development of energy storage technology, the energy storage battery box technology has also been continuously upgraded to meet the growing energy density and safety requirements.

[0003] The structural design of the energy storage battery box must not only consider its mechanical strength and rigidity, but also the heat dissipation performance and electrical insulation. The common energy storage battery box structures on the market include but are not limited to aluminum alloy profile boxes, aluminum die-cast boxes, and flat-bottom boxes. For example, aluminum alloy profile boxes are widely used due to their good thermal conductivity and impact resistance. The aluminum die-cast box, due to its one-time molding process characteristics, reduces welding and other links while ensuring structural integrity, thereby improving production efficiency.

[0004] Phase change battery energy storage box technology is an advanced energy storage technology that uses the characteristics of phase change materials to absorb and release a large amount of heat energy at a specific temperature to provide effective temperature control for the battery, thereby improving the battery's service life and safety performance. The phase change battery energy storage box is mainly composed of phase change materials, insulating materials, heat dissipation structures, etc. Its design goal is to achieve the absorption or release of heat by phase change materials during the battery charging and discharging process, maintain the battery in an appropriate temperature range, and prevent the battery from overheating or overcooling. Performance degradation or even thermal runaway.

[0005] The existing phase change energy storage box has low integration, resulting in reduced strength, low heat exchange efficiency and low space utilization. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction.

[0007] The technical solution of the present invention is: a heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction, including a direct cooling plate, the front end of the direct cooling plate is fixedly connected to a front frame beam, the rear end of the direct cooling plate is fixedly connected to a rear frame beam, the left side of the direct cooling plate is fixedly connected to a left frame beam, the right side of the direct cooling plate is fixedly connected to a right frame beam, the front end of the direct cooling plate is fixedly connected to a bracket one, the bracket one is fixedly connected to the front frame beam, the top of the direct cooling plate is fixedly connected to a bracket two, the front end of the bracket two is fixedly connected to the bracket one, and the rear end of the bracket two is fixedly connected to the rear frame beam.

[0008] Furthermore, the direct cooling plate includes an intermediate plate, an upper plate is fixedly connected above the intermediate plate, a lower plate is fixedly connected below the intermediate plate, and a water inlet and a water outlet are fixedly connected at the front end of the upper plate.

[0009] Description: The direct cooling plate is divided into two layers of channels, the material is 3 series aluminum alloy, the plate thickness is 1mm, the upper plate and the middle plate are made by stamping process, and the direct cooling plate is welded by aluminum brazing as a whole; the traditional energy storage box adopts liquid cooling plate, which has large flow resistance, uneven flow distribution, poor temperature uniformity, and local flow stall zone; the direct cooling plate is different from the traditional liquid cooling plate in structure. It is changed from a single-layer flow channel to a double-layer flow channel, and the internal flow channel is optimized to solve the problems of uneven flow distribution and poor temperature uniformity. At the same time, the heat exchange medium is changed from ethylene glycol + water to Freon, with high heat transfer coefficient and fast cooling speed.

[0010] Furthermore, liquid flow channels are provided on the upper surface and the lower surface of the middle plate.

[0011] Description: Disperse the liquid flow through the liquid flow channel to make the liquid flow distribution more uniform.

[0012] Furthermore, a graphene heat sink is fixedly connected to the inner side of the left frame beam and the right frame beam, and the front and rear ends of the graphene heat sink are fixedly connected to connecting parts for fixed connection with the front frame beam and the rear frame beam.

[0013] Description: Graphene heat sinks are designed to be mounted on both sides of the energy storage box. The graphene heat sinks can conduct heat through phase change to remove the heat emitted by the battery modules on both sides when they are working. Phase change suppression heat transfer technology is a new technology that achieves efficient heat transfer by controlling the microstructure state of the heat transfer medium in a closed system. The equivalent thermal conductivity of phase change suppression heat transfer technology can be above 4000W / . Using the phase change principle to dissipate heat can increase 15-25% compared to traditional heat dissipation modes.

[0014] Furthermore, the bracket 2 includes a bottom plate, a connecting beam is vertically fixedly connected above the bottom plate, and a pressing plate is fixedly connected above the connecting beam via a screw rod.

[0015] Note: The battery module is installed on both sides of the bracket 2, and the battery module is clamped by the pressure plate to fix the battery module.

[0016] Furthermore, the bracket 1 includes a plate body 1, a support beam is fixedly connected to the top of the plate body 1, and two square holes located on the inner side of the support beam are provided on the plate body 1.

[0017] Description: The support beam is beneficial to improving the overall strength of the bracket, and the square hole is convenient for connecting the water inlet and outlet to external pipes.

[0018] Furthermore, a plurality of mounting holes are provided on the outer sides of the left frame beam and the right frame beam.

[0019] Note: The mounting hole 1 facilitates the installation of the energy storage box.

[0020] Furthermore, a cover plate is fixedly connected above the second bracket, and the outer sides of the cover plate are respectively fixedly connected to the front frame beam and the rear frame beam. A notch is provided on each of the left and right sides of the cover plate, and a vertical beam is provided on the outer side of the notch. A graphene heat dissipation top plate is installed in the notch.

[0021] Note: The graphene heat dissipation top plate installed on the cover plate enhances the heat dissipation effect of the battery module and improves the heat dissipation efficiency.

[0022] Furthermore, the front frame beam includes a side plate 1, two mounting ears are provided on the outer side of the side plate 1, and a plurality of mounting holes 2 are provided above the mounting ears.

[0023] Note: Installation hole 2 facilitates the installation and removal of the front frame beam.

[0024] Furthermore, the rear frame beam includes a side panel 2, a mounting plate is integrally formed on the outer side of the side panel 2, and a plurality of mounting holes 3 are provided on the mounting plate.

[0025] Note: Installation hole three facilitates the installation of the rear frame beam.

[0026] The beneficial effects of the present invention are:

[0027] (1) The box body is mainly composed of a front frame beam, a rear frame beam, a left frame beam, a right frame beam, a bracket 1, and connecting parts. The connections between the various components are made using CMT automatic arc welding + manual arc welding technology. Except for bracket 1 which is cast, the other frames are made using aluminum extrusion one-piece molding technology, which can ensure the overall strength and lightness of the box body. Bracket 1 is cast alone to enhance the structural strength of the water spout and protect the water spout. The dry and wet separation design is adopted, and the water spout is designed outside the box to avoid contact with the battery cell.

[0028] (2) The direct cooling plate is divided into two layers of channels, the material is 3 series aluminum alloy, the plate thickness is 1mm, the upper plate and the middle plate are made by stamping process, and the direct cooling plate is welded by aluminum brazing. The traditional energy storage box adopts liquid cooling plate, which has large flow resistance, uneven flow distribution, poor temperature uniformity, and local flow stall zone. The direct cooling plate is different from the traditional liquid cooling plate in structure. It is changed from a single-layer flow channel to a double-layer flow channel, and the internal flow channel is optimized to solve the problems of uneven flow distribution and poor temperature uniformity. At the same time, the heat exchange medium is changed from ethylene glycol + water to Freon, which has a high heat transfer coefficient and a fast cooling speed.

[0029] (3) Graphene heat sinks are designed and mounted on both sides of the energy storage box. The graphene heat sinks can conduct heat from the battery modules on both sides through phase change. Phase change suppression heat transfer technology is a new technology that achieves efficient heat transfer by controlling the microstructure state of the heat transfer medium in a closed system. The equivalent thermal conductivity of phase change suppression heat transfer technology can be above 4000W / (m.℃). Using the phase change principle to dissipate heat can increase heat dissipation by 15-25% compared to traditional heat dissipation modes.

[0030] (4) The structure of the present invention can ensure the advantages of lightweight, high integration, high heat exchange efficiency, and high space utilization of the box body, and can effectively ensure the safe and reliable operation of the high-power battery module under high-energy consumption charging and discharging operation conditions. Compared with conventional energy storage boxes, the structure is simpler, the space utilization rate is high, the temperature uniformity is good, the heat exchange efficiency is higher, the battery loss is reduced, and the safety factor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the structure of the graphene heat sink of the present invention.

[0033] Figure 3 It is an exploded view of the direct cooling plate of the present invention.

[0034] Figure 4 It is a schematic diagram of the structure of the present invention without installing a graphene heat sink.

[0035] Figure 5 It is a structural schematic diagram of the cover plate of the present invention.

[0036] Among them, 1-direct cooling plate, 2-front frame beam, 3-rear frame beam, 4-left frame beam, 5-right frame beam, 6-bracket one, 7-bracket two, 11-middle plate, 12-upper plate, 13-lower plate, 14-water inlet, 15-water outlet, 111-liquid flow channel, 8-graphene heat dissipation plate, 81-connecting part, 71-bottom plate, 72-connecting beam, 73-pressing plate, 61-plate body one, 62-support beam, 63-square hole, 41-mounting hole one, 9-cover plate, 91-notch, 92-vertical beam, 93-graphene heat dissipation top plate, 21-side plate one, 22-mounting ear, 23-mounting hole two, 31-side plate two, 32-mounting plate, 33-mounting hole three. DETAILED DESCRIPTION

[0037] Embodiment 1:

[0038] like Figure 1As shown, a heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction includes a direct cooling plate 1, the front end of the direct cooling plate 1 is fixedly connected to a front frame beam 2, the rear end of the direct cooling plate 1 is fixedly connected to a rear frame beam 3, the left side of the direct cooling plate 1 is fixedly connected to a left frame beam 4, the right side of the direct cooling plate 1 is fixedly connected to a right frame beam 5, the front end of the direct cooling plate 1 is fixedly connected to a bracket 1 6, the bracket 1 6 is fixedly connected to the front frame beam 2, the top of the direct cooling plate 1 is fixedly connected to a bracket 2 7, the front end of the bracket 2 7 is fixedly connected to the bracket 1 6, and the rear end of the bracket 2 7 is fixedly connected to the rear frame beam 3.

[0039] like Figure 3 As shown, the direct cooling plate 1 includes an intermediate plate 11, an upper plate 12 is fixedly connected above the intermediate plate 11, a lower plate 13 is fixedly connected below the intermediate plate 11, and a water inlet 14 and a water outlet 15 are fixedly connected at the front end of the upper plate 12.

[0040] The direct cooling plate 1 is divided into two layers of channels, the material is 3 series aluminum alloy material, the plate thickness is 1mm, the upper plate 12 and the middle plate 11 are made by stamping process, and the direct cooling plate 1 is completed by aluminum brazing welding as a whole; the traditional energy storage box adopts liquid cooling plate, which has large flow resistance, uneven flow distribution, poor temperature uniformity, and local flow stall zone; the direct cooling plate 1 is different from the traditional liquid cooling plate in structure, and the single-layer flow channel is changed to a double-layer flow channel, and the internal flow channel is optimized, which solves the problems of uneven flow distribution and poor temperature uniformity. At the same time, the heat exchange medium is changed from ethylene glycol + water to Freon, which has a high heat transfer coefficient and a fast cooling speed.

[0041] Liquid flow channels 111 are provided on the upper surface and the lower surface of the middle plate 11 .

[0042] The liquid flow is dispersed through the liquid flow channel 111, so that the liquid flow distribution is more uniform.

[0043] The second bracket 7 includes a bottom plate 71 , a connecting beam 72 is vertically fixedly connected to the top of the bottom plate 71 , and a pressing plate 73 is fixedly connected to the top of the connecting beam 72 via a screw.

[0044] The battery module is mounted on both sides of the bracket 2 7 , and the battery module is clamped by the pressing plate 73 , thereby fixing the battery module.

[0045] like Figure 4 As shown, the bracket 6 includes a plate body 61 , a support beam 62 is fixedly connected to the top of the plate body 61 , and two square holes 63 located on the inner side of the support beam 62 are provided on the plate body 61 .

[0046] The support beam 62 is beneficial to improving the overall strength of the bracket 6, and the square hole 63 is convenient for the water inlet 14 and the water outlet 15 to be connected to the external pipeline.

[0047] A plurality of mounting holes 41 are provided on the outer sides of the left frame beam 4 and the right frame beam 5 .

[0048] The mounting hole 41 facilitates the installation of the energy storage box.

[0049] The front frame beam 2 includes a side plate 1 21 . Two mounting ears 22 are provided on the outer side of the side plate 1 21 . A plurality of mounting holes 23 are provided above the mounting ears 22 .

[0050] The second mounting hole 23 facilitates the installation and removal of the front frame beam 2 .

[0051] The rear frame beam 3 includes a second side plate 31 , and a mounting plate 32 is integrally formed on the outer side of the second side plate 31 . A plurality of third mounting holes 33 are provided on the mounting plate 32 .

[0052] The installation of the rear frame beam 3 is facilitated by the installation hole three 33 .

[0053] Embodiment 2:

[0054] The difference between this embodiment and embodiment 2 is that Figure 2 As shown, a graphene heat conducting plate 8 is fixedly connected to the inner side of the left frame beam 4 and the right frame beam 5 , and the front and rear ends of the graphene heat conducting plate 8 are fixedly connected to connecting parts 81 for fixed connection with the front frame beam 2 and the rear frame beam 3 .

[0055] Compared with Example 1, the present embodiment is designed to mount graphene heat sinks 8 on both sides of the energy storage box. The graphene heat sinks 8 can conduct heat from the battery modules on both sides when they are working through phase change heat conduction. Phase change suppression heat transfer technology is a new technology that achieves efficient heat transfer by controlling the microstructure state of the heat transfer medium in a closed system. The equivalent thermal conductivity of the phase change suppression heat transfer technology can be above 4000W / m.℃. Using the phase change principle to dissipate heat can increase heat dissipation by 15-25% compared to traditional heat dissipation modes.

[0056] Embodiment 3:

[0057] The difference between this embodiment and embodiment 1 is that Figure 5 As shown, a cover plate 9 is fixedly connected above the bracket 2 7 , and the outer sides of the cover plate 9 are respectively fixedly connected to the front frame beam 2 and the rear frame beam 3 , a notch 91 is provided on each of the left and right sides of the cover plate 9 , a vertical beam 92 is provided on the outer side of the notch 91 , and a graphene heat dissipation top plate 93 is installed in the notch 91 .

[0058] Compared with the embodiment, the present embodiment enhances the heat dissipation effect of the battery module and improves the heat dissipation efficiency by installing a graphene heat dissipation top plate 93 on the cover plate 9.

[0059] Working principle of embodiment 3:

[0060] The battery module is placed on the upper surface of the direct cooling plate 1, fixed and clamped by the pressing plate 73, and then covered on the top of the battery module by the cover plate 9; the water inlet 14 and the water outlet 15 are connected to the Freon refrigerant for circulating refrigeration, and the refrigerant enters the direct cooling plate 1 through the upper and lower channels and flows into the direct cooling plate 1, and then is discharged from the box through the water outlet 15, taking away the heat generated by the discharge of the battery module. The graphene heat sink 8 and the graphene heat sink top plate 93 conduct heat through phase change to take away the heat emitted by the battery modules on both sides when they are working. The equivalent thermal conductivity of the phase change suppression heat transfer technology can be above 4000W / m.℃, which can be increased by 15-25% compared with the traditional heat dissipation mode.

Claims

1. A heat dissipation type photovoltaic energy storage battery box based on phase change heat conduction, comprising a direct cooling plate (1), the front end of the direct cooling plate (1) is fixedly connected to a front frame beam (2), the rear end of the direct cooling plate (1) is fixedly connected to a rear frame beam (3), the left side of the direct cooling plate (1) is fixedly connected to a left frame beam (4), the right side of the direct cooling plate (1) is fixedly connected to a right frame beam (5), the front end of the direct cooling plate (1) is fixedly connected to a bracket 1 (6), the bracket 1 (6) is fixedly connected to the front frame beam (2), the upper part of the direct cooling plate (1) is fixedly connected to a bracket 2 (7), the front end of the bracket 2 (7) is fixedly connected to the bracket 1 (6), and the rear end of the bracket 2 (7) is fixedly connected to the rear frame beam (3).

2. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: The direct cooling plate (1) comprises an intermediate plate (11), an upper plate (12) is fixedly connected above the intermediate plate (11), a lower plate (13) is fixedly connected below the intermediate plate (11), and a water inlet (14) and a water outlet (15) are fixedly connected at the front end of the upper plate (12).

3. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 2, characterized in that: Liquid flow channels (111) are provided on the upper surface and the lower surface of the middle plate (11).

4. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: A graphene heat sink (8) is fixedly connected to the inner side of each of the left frame beam (4) and the right frame beam (5), and a connecting piece (81) for fixedly connecting to the front frame beam (2) and the rear frame beam (3) is fixedly connected to the front and rear ends of the graphene heat sink (8).

5. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: The second bracket (7) comprises a bottom plate (71), a connecting beam (72) is vertically fixedly connected above the bottom plate (71), and a pressing plate (73) is fixedly connected above the connecting beam (72) via a screw rod.

6. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: The bracket one (6) comprises a plate body one (61), a support beam (62) is fixedly connected to the top of the plate body one (61), and two square holes (63) located on the inner side of the support beam (62) are provided on the plate body one (61).

7. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: A plurality of mounting holes (41) are provided on the outer sides of the left frame beam (4) and the right frame beam (5).

8. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: A cover plate (9) is fixedly connected above the second bracket (7); the outer sides of the cover plate (9) are respectively fixedly connected to the front frame beam (2) and the rear frame beam (3); a notch (91) is provided on the left and right sides of the cover plate (9); a vertical beam (92) is provided on the outer side of the notch (91); and a graphene heat dissipation top plate (93) is installed in the notch (91).

9. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: The front frame beam (2) comprises a side plate (21), the outer side of the side plate (21) is provided with two mounting ears (22), and a plurality of mounting holes (23) are provided above the mounting ears (22).

10. A heat dissipation photovoltaic energy storage battery box based on phase change heat conduction as claimed in claim 1, characterized in that: The front frame beam (2) comprises a side plate (21), and two mounting ears (22) are provided on the outer side of the side plate (21).

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