Battery cabinet longitudinal air duct heat dissipation structure

Abstract

The application relates to the technical field of basic electrical components, in particular to a battery cabinet longitudinal air duct heat dissipation structure, which comprises multiple heat dissipation units and fan flow guide covers connected side by side, each heat dissipation unit comprises an air duct spacing plate, a bottom air guide plate and a ladder air duct plate, the bottom air guide plate is fixed on the bottom plate in the battery cabinet, an air inlet for cooling air to pass through is arranged on the bottom air guide plate, the ladder air duct plate is arranged in the battery cabinet in the longitudinal direction, the air flow direction in the battery cabinet is longitudinal, multiple air guide vanes are arranged on the two sides of the ladder air duct plate, the multiple air guide vanes are arranged in longitudinal parallel, a gap is arranged on each air guide vane, and all the gaps are combined to form a triangular air guide flow channel. The application solves the technical problems of large space waste and low volume utilization rate of the lithium titanate battery cabinet in the prior art. The lattice structure of the ladder air duct plate improves the flow pressure and accelerates the transmission efficiency of the cold air, and can effectively eliminate the cold air vortex and reduce the air duct resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of basic electrical elements, in particular to a battery cabinet longitudinal air duct heat dissipation structure. BACKGROUND

[0002] The lithium titanate battery cabinet is a commonly used battery equipment for new energy public vehicles, which is used for assisting the vehicle energy during the vehicle driving process and as an energy dynamic recovery accumulator. In order to meet the requirements of power performance indicators, the module power supply must provide higher power density to adapt to more compact installation space. In order to meet these harsh application conditions, especially for high-power module power supply (output power >1000W), the heat dissipation design is particularly important, only good heat conduction and heat dissipation effect can ensure its stable and reliable work. The existing module power supply usually adopts a horizontal design structure, which has large space waste, low volume utilization rate, and cannot fully utilize the heat dissipation of the power module itself. Moreover, eight groups of low-power cooling fans are needed to be equipped outside the box to cooperate with heat dissipation, and the heat dissipation efficiency is low.

[0003] In summary, there is an urgent need for a heat dissipation structure with high volume utilization rate and low heat dissipation efficiency to solve the problems in the prior art. SUMMARY

[0004] The present application aims to provide a battery cabinet longitudinal air duct heat dissipation structure to solve the technical problems of large space waste and low volume utilization rate of the lithium titanate battery cabinet in the prior art, and the specific technical solutions are as follows:

[0005] The present application provides a battery cabinet longitudinal air duct heat dissipation structure, which comprises a plurality of heat dissipation units and a fan flow guide cover connected side by side, each heat dissipation unit comprises an air duct spacing plate, a bottom air guide plate and a stepped air duct plate, the bottom air guide plate is fixed to the bottom plate inside the battery cabinet, the bottom air guide plate is provided with an air inlet for cooling air to pass through, the stepped air duct plate is arranged in the longitudinal direction inside the battery cabinet, the air flow direction in the battery cabinet is longitudinal, the two sides of the stepped air duct plate are provided with a plurality of air guide vanes, the plurality of air guide vanes are arranged in longitudinal parallel, each air guide vane is provided with a notch, all notches are combined to form a triangular air guide flow channel, the air duct spacing plate is fixed in the battery cabinet and detachably fixed with the stepped air duct plate, the fan flow guide cover is fixed outside the battery cabinet, the first end of the fan flow guide cover is connected to the air outlet of the battery cabinet, and the second end of the fan flow guide cover is connected to the external turbine fan.

[0006] The further improvement of the battery cabinet longitudinal air duct heat dissipation structure is that the width of the notch on the air guide vane gradually increases from top to bottom, forming a triangular air guide flow channel with small top and large bottom.

[0007] A further improvement of the vertical air duct heat dissipation structure of the battery cabinet of the present invention is that the heat dissipation unit also includes two air duct bottom blocks and two top mounting blocks, the two air duct bottom blocks are fixed to the bottom plate inside the battery cabinet and are respectively located on both sides of the bottom air guide plate, the two top mounting blocks are fixed to the fixing seat, and the four corners of the stepped air duct plate are corresponding to each other and are detachably fixed between the two air duct bottom blocks and the two top mounting blocks.

[0008] A further improvement of the vertical air duct heat dissipation structure of the battery cabinet of the present invention is that the number of the air duct partition plates is two groups, and the two groups of the air duct partition plates are detachably fixed to the two side ends of the stepped air duct plate.

[0009] A further improvement of the longitudinal air duct heat dissipation structure of the battery cabinet of the present invention is that each group of the air duct partition plates includes two fixed partition plates and two detachable partition plates, the two fixed partition plates are fixed in the battery cabinet along the horizontal interval, the two detachable partition plates are detachably fixed between the two fixed partition plates along the horizontal interval, and the stepped air duct plate is detachably fixed between the two detachable partition plates.

[0010] A further improvement of the vertical air duct heat dissipation structure of the battery cabinet of the present invention is that the detachable partition plate is a bent plate, and a waist hole for detachably fixing the stepped air duct plate is provided on the detachable partition plate.

[0011] A further improvement of the vertical air duct heat dissipation structure of the battery cabinet of the present invention is that the distance between two adjacent air guide blades is 10-20 mm.

[0012] A further improvement of the vertical air duct heat dissipation structure of the battery cabinet of the present invention is that the stepped air duct plate is an integrally formed structure.

[0013] The application of the technical solution of the present invention has the following beneficial effects:

[0014] The present invention's vertically mounted air duct heat dissipation structure for a battery cabinet improves space utilization within the cabinet by employing longitudinally positioned heat dissipation units, allowing for storage of more batteries. This addresses the technical issues of significant space waste and low volume utilization in prior art lithium titanate battery cabinets. The grid structure of the present invention's stepped air duct plates increases circulation pressure, accelerating the efficient transfer of cold air. This effectively eliminates cold air vortices and reduces air duct resistance. Combined with a fan shroud connected to a turbine blower, this increases the cooling air flow rate, thereby enhancing the heat dissipation efficiency of the battery cabinet.

[0015] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the connection of three heat dissipation units of the vertical air duct heat dissipation structure of the battery cabinet of the present invention;

[0018] Figure 2 This is an exploded view of the vertical air duct heat dissipation structure of the battery cabinet of the present invention within the battery cabinet;

[0019] Figure 3 This is a schematic structural diagram of the heat dissipation unit of the vertical air duct heat dissipation structure of the battery cabinet of the present invention;

[0020] Figure 4 This is a schematic structural diagram of a detachable partition plate of a vertically mounted air duct heat dissipation structure of a battery cabinet according to the present invention;

[0021] Figure 5 This is a schematic structural diagram of the bottom air guide plate of the vertical air duct heat dissipation structure of the battery cabinet of the present invention;

[0022] Figure 6 This is a structural schematic diagram of the stepped air duct plate of the vertical air duct heat dissipation structure of the battery cabinet of the present invention;

[0023] Figure 7 This is a schematic structural diagram of the air duct bottom block of the vertical air duct heat dissipation structure of the battery cabinet of the present invention;

[0024] Figure 8 This is a schematic structural diagram of the top mounting block of the vertical air duct heat dissipation structure of the battery cabinet of the present invention;

[0025] Figure 9 It is a schematic diagram of the cooling air flow direction of the vertical air duct heat dissipation structure of the battery cabinet of the present invention.

[0026] Among them, 1. Battery cabinet; 2. Fan air deflector; 3. Stepped air duct plate; 4. Fixed partition plate; 5. Removable partition plate; 6. Bottom air guide plate; 7. Air duct bottom block; 8. Top mounting block; 9. Air guide blades; 10. Air inlet; 11. Air guide duct. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] See also Figures 1 to 9As shown, a battery cabinet 1 longitudinal placement type air duct heat dissipation structure includes multiple heat dissipation units and a fan flow guide cover 2 connected side by side, each heat dissipation unit includes an air duct spacing plate, a bottom air guide plate 6 fixed to the bottom plate inside the battery cabinet 1, the bottom air guide plate 6 is provided with an air inlet 10 for cooling air to pass through, and a stepped air duct plate 3 arranged longitudinally inside the battery cabinet 1, the air flow direction inside the battery cabinet 1 is longitudinal, multiple air guide vanes 9 are arranged on both sides of the stepped air duct plate 3, the multiple air guide vanes 9 are arranged longitudinally in parallel, each air guide vane 9 is provided with a notch, and all notches are combined to form a triangular air guide flow channel 11, the air duct spacing plate is fixed inside the battery cabinet 1 and detachably fixed with the stepped air duct plate 3, the fan flow guide cover 2 is fixed outside the battery cabinet 1, the first end of the fan flow guide cover 2 is connected to the air outlet of the battery cabinet 1, and the second end of the fan flow guide cover 2 is connected to an external turbine fan.

[0029] Specifically, as shown in Figure 1 and Figure 2 , the fan flow guide cover 2 is a welded structure, the box body outer skin of the battery cabinet 1 is bolted, the shape of the fan flow guide cover 2 is designed to imitate the shape of a volute to cooperate with the turbine fan to establish an air duct. The heat dissipation unit of the present application is simple to assemble and disassemble by modules, and can effectively reduce the design difficulty of the battery cabinet 1 box body and realize the combination of products with different battery capacities in the same box body.

[0030] Compared with the transverse structure, the longitudinal structure has higher space utilization, the existing transverse structure can only accommodate sixteen groups of batteries, and the longitudinal structure can store twenty-four groups of batteries, thereby improving the energy density of the unit box body. In the embodiment, the battery cabinet 1 box body includes four heat dissipation blocks, the four heat dissipation blocks are not connected to each other, each heat dissipation block is provided with three heat dissipation units, the outside of the battery cabinet 1 box body is provided with four turbine fans corresponding to the four heat dissipation blocks to suck the internal hot air, the volute shape is specially designed according to the ventilation and heat dissipation efficiency to improve the ventilation and heat dissipation efficiency, and the existing eight axial flow type low suction fan design structure is replaced. The air guide vanes 9 of the stepped air duct plate 3 of the three heat dissipation units can improve the flow pressure and accelerate the transmission efficiency of the cold air, and eliminate the function of vortex, and the stepped air duct plate 3 is provided with screw holes for connecting the air duct spacing plate, the air duct bottom clamping block 7 and the top mounting block 8.

[0031] All the box body components of the battery cabinet 1 are made of aluminum alloy plates, which are light in weight. The components are assembled by screws and rivets, the welding amount is small, and the disassembly operation is convenient. As shown in Figure 5As shown, the bottom air guide plate 6 is cut using water jet cutting, which reduces production costs. The heat flow field is calculated based on the heat generation of the battery modules and the power of the turbofan, and the cross-sectional design dimensions of the air inlet 10 are adjusted accordingly. The bottom air guide plate 6 is a thin-walled sheet metal structure riveted to the bottom of the battery cabinet 1, facilitating maintenance and replacement. The entire cooling unit adopts a modular and removable structure, facilitating maintenance and allowing for tailored cooling efficiency for different battery capacities within the same battery cabinet 1.

[0032] Preferably, Figure 6 As shown, the width of the notch on the air guide blade 9 gradually increases from top to bottom, forming a triangular air guide channel 11 with a smaller top and a larger bottom. The adjacent air guide blades 9 of the stepped air duct plate 3 are parallel to each other to establish a straight air duct. The blade layout of a single stepped air duct plate 3 from bottom to top forms a triangular air guide channel 11 structure, which can effectively eliminate cold air vortexes and reduce air duct resistance. The flow rate of the cold air can be controlled by changing the size of the triangular air guide channel 11. Figure 1 and Figure 2 The mid-step air duct plate 3 has two embodiments.

[0033] Preferably, Figure 7 and Figure 8 As shown, the heat dissipation unit also includes two air duct bottom blocks 7 and two top mounting blocks 8. The two air duct bottom blocks 7 are fixed to the bottom plate inside the battery cabinet 1 and are respectively located on both sides of the bottom air guide plate 6. The two top mounting blocks 8 are fixed to the fixing seat. The four corners of the stepped air duct plate 3 are corresponding to each other and are detachably fixed between the two air duct bottom blocks 7 and the two top mounting blocks 8. The air duct bottom blocks 7 are welded to the bottom frame beam of the battery cabinet 1 box body, providing a positioning reference for the stepped air duct plate 3. The air duct bottom blocks 7 are provided with a structure for bolt fastening and are fastened to the stepped air duct plate 3 by bolts. The top mounting block 8 is a sheet metal bending part designed with a structure for bolt fastening and serves as an intermediate bridge connecting the stepped air duct plate 3 and the removable partition plate 5. A wire thread sleeve is arranged in the top mounting block 8, and a hexagon socket countersunk screw can be used to evenly apply Loctite thread fastener and then tighten it so that the stepped air duct plate 3, the top mounting block 8 and the air duct partition plate can be well fastened and prevented from loosening.

[0034] Preferably, the number of duct partitions is two sets, and the two sets of duct partitions are removably fixed to the two side ends of the stepped duct plate 3. Furthermore, each set of duct partitions includes two fixed partitions 4 and two removable partitions 5. The two fixed partitions 4 are fixed in the battery cabinet 1 along a transverse interval, and the two removable partitions 5 are removably fixed between the two fixed partitions 4 along a transverse interval. The stepped duct plate 3 is removably fixed between the two removable partitions 5. The fixed partitions 4 and the removable partitions 5 are superimposed and parallel to each other. The fixed partitions 4 are welded to the battery cabinet 1 as a whole. The removable partitions 5 are bent plates with waist holes for bolts to pass through. They are cut using water jet cutting. The waist holes can compensate for assembly errors, control precision dimensions, and have good processability.

[0035] Preferably, as 1, Figure 3 and Figure 4 As shown, the detachable partition plate 5 is a bent plate with a waist hole for detachably fixing the stepped air duct plate 3. The bent plate can increase the strength of the fixing member and also play the role of isolating the air passage between the air guide blades 9, so that the air flows from the air passage between the air guide blades 9 to the air guide channel 11.

[0036] Preferably, the distance between two adjacent air guide blades 9 is 10-20 mm. The width of the air guide blades 9 is designed according to actual needs. In this embodiment, the width of the air guide blades 9 is 15 mm.

[0037] Preferably, the stepped air duct plate 3 is an integrally molded structure. The stepped air duct plate 3 utilizes integrally machined air guide blades 9, achieving a one-piece molding process. This provides high overall strength, minimizes deformation, and allows the cross-sectional design of the air guide channel 11 to be adjusted based on the heat generated by the battery module and the power of the turbofan. This reduces the cost of mass production. The one-piece molded structure offers high overall strength, minimizes deformation, and reduces the cost of mass production compared to welded structures.

[0038] The three heat dissipation units form a closed cavity with the box of the battery cabinet 1, so that the cooling air can form a convection air duct between the six battery modules in the three heat dissipation units. Figure 9 As shown by the arrow, the air conditioning cooling air (18°~25°) in the car enters the module from the air inlet 10 of the bottom air guide plate 6 and is sucked out by the suction force formed by the worm turbine fan. The cold air creates a flow velocity difference with the stainless steel surface of the battery module and carries away the heat dissipated by the battery. The hot air is directly guided to the exhaust port of the worm turbine fan along the middle position through the stepped air duct plate 3 to be discharged. This solves the current serious fault problem of the longitudinal lithium titanate battery cabinet structure without a dedicated battery air duct, insufficient heat dissipation leading to a high temperature alarm and the risk of vehicle parking in summer.

[0039] The battery cabinet 1 longitudinal air duct heat dissipation structure improves the space utilization rate in the battery cabinet 1 by adopting the longitudinally arranged heat dissipation unit, more storage batteries can be stored, and the technical problems of the lithium titanate battery cabinet 1 in the prior art, such as large space waste and low volume utilization rate, are solved. The grid structure of the ladder air duct plate 3 improves the flow pressure and accelerates the transmission efficiency of the cold air, can effectively eliminate the cold air vortex and reduce the air duct resistance, and cooperates with the turbine fan connected by the fan flow guide cover 2 to improve the flow rate of the cooling air, thereby improving the heat dissipation efficiency of the battery cabinet 1.

[0040] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cabinet longitudinal air duct heat dissipation structure, wherein a battery module is fixed inside the battery cabinet (1) via a fixing seat, characterized in that: The invention comprises a plurality of heat dissipation units and a fan air guide cover (2) connected in parallel, each heat dissipation unit comprising an air duct partition plate, a bottom air guide plate (6) and a stepped air duct plate (3), the bottom air guide plate (6) being fixed to the bottom plate inside the battery cabinet (1), the bottom air guide plate (6) being provided with an air inlet (10) for cooling air to pass through, the stepped air duct plate (3) being arranged longitudinally inside the battery cabinet (1), the air flow direction inside the battery cabinet (1) being longitudinal, and a plurality of air guide blades being provided on both sides of the stepped air duct plate (3) (9), a plurality of the air guide blades (9) are arranged in parallel in a longitudinal direction, each of the air guide blades (9) is provided with a notch, and all the notches are combined to form a triangular air guide channel (11), the air duct partition plate is fixed in the battery cabinet (1) and is detachably fixed to the stepped air duct plate (3), the fan air guide cover (2) is fixed to the outside of the battery cabinet (1), the first end of the fan air guide cover (2) is connected to the air outlet of the battery cabinet (1), and the second end of the fan air guide cover (2) is connected to an external turbine fan; The width of the notch on the air guide blade (9) gradually increases from top to bottom, forming a triangular air guide channel (11) that is smaller at the top and larger at the bottom.

2. The battery cabinet vertical air duct heat dissipation structure according to claim 1, characterized in that: The heat dissipation unit further comprises two air duct bottom blocks (7) and two top mounting blocks (8), wherein the two air duct bottom blocks (7) are fixed to the bottom plate inside the battery cabinet (1) and are respectively located on both sides of the bottom air guide plate (6), and the two top mounting blocks (8) are fixed to the fixing seat, and the four corners of the stepped air duct plate (3) are fixed one-to-one and detachably between the two air duct bottom blocks (7) and the two top mounting blocks (8).

3. The battery cabinet vertical air duct heat dissipation structure according to claim 1, characterized in that: The number of the air duct partition plates is two groups, and the two groups of air duct partition plates are detachably fixed to the two side ends of the stepped air duct plate (3).

4. The battery cabinet vertical air duct heat dissipation structure according to claim 3, characterized in that: Each group of the air duct partition plates comprises two fixed partition plates (4) and two detachable partition plates (5), the two fixed partition plates (4) are fixed in the battery cabinet (1) along a transverse interval, the two detachable partition plates (5) are detachably fixed between the two fixed partition plates (4) along a transverse interval, and the stepped air duct plate (3) is detachably fixed between the two detachable partition plates (5).

5. The battery cabinet vertical air duct heat dissipation structure according to claim 4, characterized in that: The detachable partition plate (5) is a bent plate, and a waist hole for detachably fixing the stepped air duct plate (3) is provided on the detachable partition plate (5).

6. The battery cabinet vertical air duct heat dissipation structure according to claim 1, characterized in that: The distance between two adjacent air guide blades (9) is 10-20 mm.

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