Stacked energy storage battery box with built-in heat conduction structure

Abstract

The invention discloses a stacked energy storage battery box with a built-in heat conduction structure, relates to the technical field of energy storage battery boxes, and aims to solve the problems of single heat dissipation air duct, unsmooth air duct after stacking or non-uniform heat dissipation of a traditional battery box. Comprising a battery inner box assembly which is arranged in a battery outer box and is stacked; by adopting the structural design of the three-dimensional circulating heat-conducting air duct formed by combining the transverse circulating air duct and the longitudinal circulating air duct, a novel multi-direction and three-dimensional built-in heat-conducting structure is provided for the stacked energy storage battery box; the method specifically comprises the following steps: mutually stacking crossed independent heat-conducting subareas matched with transverse circulation and longitudinal circulation to form a three-dimensional heat-conducting area, so as to provide a heat dissipation mode integrating wrapping property, interpenetration property and filling property for the energy storage battery box; the problems of unsmooth air ducts and uneven heat dissipation caused by single heat dissipation air ducts of a traditional battery box after stacking are solved, and the heat dissipation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage battery box, and particularly relates to a stacked energy storage battery box with built-in heat conduction structure. BACKGROUND

[0002] With the rapid development of energy storage technology, the integration and power density of energy storage battery boxes are continuously improved, and the stacked design is widely used because it can efficiently utilize space and reduce container deployment costs. The stacked energy storage battery is a stacked installation of energy storage batteries, and the mechanical and electrical connections are completed by using a modular box.

[0003] To maximize space utilization, the battery pack is usually designed as a planar stacked structure, but the external arrangement of the cooling pipeline and electrical components increases the installation volume, and the planar design of the top and bottom of the traditional battery box leads to poor air duct after stacking, further exacerbating the uneven heat dissipation problem. The existing technology relies on fixed air ducts or single heat dissipation medium, and cannot dynamically adjust the heat dissipation strategy according to the real-time temperature of the battery cell, especially in high-power charging and discharging scenarios, which is prone to local thermal runaway risk. The traditional integrated battery box structure has low versatility, and it is difficult to adapt to different energy storage capacity requirements through flexible stacking. In addition, the integrated design of electrical connections and heat dissipation pipelines is complex, resulting in low assembly efficiency. Therefore, the present application proposes a solution. SUMMARY

[0004] The present application aims to provide a stacked energy storage battery box with built-in heat conduction structure to solve the problems mentioned above.

[0005] The present application can be achieved by the following technical solution: a stacked energy storage battery box with built-in heat conduction structure, comprising a battery inner box assembly arranged in a stacked manner in a battery outer box; the inner side of the battery outer box is symmetrically provided with a blast duct, the inner side of the blast duct is provided with a turbulence frame body, and the inner wall of the blast duct is provided with a side inlet hole horizontally aligned with the gap between the battery inner box assembly; the blast duct, the side inlet hole and the gap between the battery inner box assembly jointly form a horizontal circulating air duct; the battery inner box assembly comprises an inner box seat and an inner box cover, a liquid cooling seat is embedded in the middle of the upper end of the inner box cover, a guide outlet hole and a top inlet hole are respectively formed in the longitudinal middle of the inner box seat and the liquid cooling seat, and the top inlet hole, the guide outlet hole and the inner cavity of the battery inner box assembly jointly form a vertical circulating air duct; the horizontal circulating air duct and the vertical circulating air duct form a three-dimensional annular heat conduction air duct.

[0006] Further provided is that an axial flow fan for blast input is installed on the blast duct, and the blast duct is in communication with the internal space of the battery inner box assembly.

[0007] Further arrangement is that the inside of the inner box seat and the inner box cover is used for storing the battery cell, and the inner box seat, the inner box cover and the liquid cooling seat are longitudinally uniformly arranged with the liquid cooling pipes connected with the circulating pump, and the inner ring side of the liquid cooling pipe is directly contacted with the battery cell.

[0008] Further arrangement is that the liquid cooling seat is embedded in the middle part of the inner box cover, and the top part of the liquid cooling seat comprises a connected horizontal structure and an inclined structure, and the horizontal structure is close to the opening side of the battery outer box.

[0009] Further arrangement is that the top-in hole is arranged in the middle part of the inclined structure of the liquid cooling seat, and the front end of the top-in hole is connected with the docking hole arranged on the horizontal structure of the liquid cooling seat, the docking hole is vertically aligned with the guide-out hole, and the liquid cooling pipes are uniformly distributed below the liquid cooling seat.

[0010] Further arrangement is that the heat-conducting ring is mounted between the inner walls of the inner box seat and the inner box cover, the liquid cooling pipe is embedded in the inner bottom middle part of the heat-conducting ring, the heat-conducting ring is discontinuous in the vertical direction corresponding to the embedding of the liquid cooling pipe, and the heat-conducting ring is also provided with a round hole corresponding to the guide-out hole.

[0011] Further arrangement is that the side cover plate is mounted at the front end of the battery outer box, the top-in air inlet is arranged at the upper middle part of the battery outer box corresponding to the top-in hole, the bottom of the battery outer box is a sunken structure and the middle part is provided with an air outlet, and the air outlet is vertically aligned with the guide-out hole.

[0012] Further arrangement is that the turbulent frame body is in a right triangle structure, and the gap is formed between the outer side end of the turbulent frame body and the inner wall of the air duct.

[0013] Further arrangement is that the outer side of each inner box seat is mounted with the mounting table corresponding to the turbulent frame body, the inner wall of the air duct on the outer side is mounted with the air guide plate parallel to the lower wall of the turbulent frame body, the other end of the air guide plate has a gap with the inner wall of the air duct, and the air guide direction of the air guide plate is aligned with the side-in hole.

[0014] The application has the following advantages: 1. The application is aimed at the problem of single heat dissipation air duct in the traditional battery box, and the air duct is not smooth or the heat dissipation is uneven after stacking. Firstly, the three-dimensional circulating heat conduction air duct structure composed of horizontal circulating air duct and vertical circulating air duct is adopted, which provides a novel multi-directional and three-dimensional built-in heat conduction structure for the stacked energy storage battery box, and the independent heat conduction partition of the intersecting horizontal circulation and vertical circulation is also stacked to form a three-dimensional heat conduction area.

[0015] 2. The triple heat dissipation structure design of air cooling + liquid cooling + heat conduction is formed by combining liquid cooling with heat conduction, so as to realize direct heat dissipation of the energy storage battery box for the stacked energy storage battery, match the problem of local thermal runaway risk prone to occur in the high-power charging and discharging scene, and provide the energy storage battery box with the heat dissipation mode integrating wrapping, intercalation and fullness, solve the problems of poor air duct and uneven heat dissipation caused by single heat dissipation air duct of the traditional battery box after stacking, and improve the heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The structure schematic diagram of the present application is shown in the figure. Figure 2 The bottom view structure schematic diagram of the present application is shown in the figure. Figure 3 The front view sectional view of the present application is shown in the figure. Figure 4 The internal structure front view sectional view of the present application is shown in the figure. Figure 5 The side view sectional view of the present application is shown in the figure. Figure 6 The front view air duct flow direction schematic diagram of the present application is shown in the figure. Figure 7 The side view air duct flow direction schematic diagram of the present application is shown in the figure. Figure 8 The structure split diagram of the battery inner box of the present application is shown in the figure. Figure 9 The structure sectional view of the battery inner box of the present application is shown in the figure. Figure 10 The internal structure overall schematic diagram of the present application is shown in the figure.

[0018] In the figure: 1, battery outer box; 2, side cover plate; 3, top air inlet; 4, air outlet; 5, inner box seat; 6, inner box cover; 7, liquid cooling seat; 8, air duct; 9, liquid cooling pipe; 10, mounting table; 11, air guide plate; 12, side inlet hole; 13, top inlet hole; 14, heat conduction ring; 15, butt joint hole; 16, guide outlet hole; 17, turbulence frame body; 18, axial flow fan. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be described clearly and completely below in connection with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0020] Embodiment one: In view of the problem that the single heat dissipation air duct of the traditional battery box is not smooth or uneven after stacking, the following technical solution is proposed: Referring to Figure 1 Figure 7 The stacked energy storage battery box with a built-in heat conduction structure in the embodiment includes a battery inner box assembly arranged in the battery outer box 1. The inner side of the battery outer box 1 is symmetrically provided with a blast duct 8. The inner side of the blast duct 8 is provided with a turbulence frame body 17. The inner wall of the blast duct 8 is provided with a side inlet hole 12 horizontally aligned with the gap between the battery inner box assembly. The blast duct 8, the side inlet hole 12 and the gap between the battery inner box assembly jointly form a horizontal circulating air duct. The battery inner box assembly includes an inner box seat 5 and an inner box cover 6. The upper middle part of the inner box cover 6 is embedded with a liquid cooling seat 7. The longitudinal middle part of the inner box seat 5 and the liquid cooling seat 7 is respectively provided with a guide outlet hole 16 and a top inlet hole 13. The top inlet hole 13, the guide outlet hole 16 and the inner cavity of the battery inner box assembly jointly form a vertical circulating air duct. The top inlet hole 13 is provided on the middle part of the inclined structure of the liquid cooling seat 7. The front end of the top inlet hole 13 is connected with a butt joint hole 15 provided on the horizontal structure of the liquid cooling seat 7. The butt joint hole 15 is vertically aligned with the guide outlet hole 16. The liquid cooling pipes 9 are uniformly distributed below the liquid cooling seat 7. The horizontal circulating air duct and the vertical circulating air duct form a three-dimensional annular heat conduction air duct. The front end of the battery outer box 1 is provided with a side cover plate 2. The upper middle part of the battery outer box 1 corresponding to the top inlet hole 13 is provided with a top inlet 3. The bottom of the battery outer box 1 is a sunken structure and is provided with an outlet 4 in the middle part. The outlet 4 is vertically aligned with the guide outlet hole 16. Based on the above, in the three-dimensional circulating heat conduction air duct formed by the combination of the horizontal circulating air duct and the vertical circulating air duct, the air cooling source is provided by the axial flow fan 18 and the liquid cooling heat dissipation is provided by the circulating pump. The combination of the two can make the energy storage battery box get sufficient heat dissipation effect, as follows: The blast duct 8 is provided with an axial flow fan 18 for blast input. The blast duct 8 is connected with the internal space of the battery inner box assembly. The axial flow fan 18 is also provided outside the battery outer box 1 to provide air source for the top inlet 3. ​The turbulence frame 17 is in a right triangle structure, and a gap is formed between the proximal outer end of the turbulence frame 17 and the outer side inner wall of the air duct 8. The outer side of each inner box seat 5 is provided with a mounting table 10 corresponding to the turbulence frame 17. The inner wall on the outer side of the air duct 8 is provided with an air guide plate 11 parallel to the lower wall of the turbulence frame 17. The other end of the air guide plate 11 has a gap with the inner wall of the air duct 8, and the air guide direction of the air guide plate 11 is aligned with the side inlet hole 12. Referring to Figure 6 , the operation mechanism of the transverse circulating air duct is that the axial flow fan 18 blows air into the air duct 8 through the top, and then enters the side inlet hole 12 under the guidance of the air guide plate 11 and fills into the gap between the battery inner box assemblies. With the guidance principle of the longitudinal circulating air duct, the air continues to enter the battery inner box assembly through the top inlet hole 13 when filling, thereby providing air source for longitudinal heat conduction circulation. Referring to Figure 7 , and the operation mechanism of the longitudinal circulating air duct is that the axial flow fan 18 blows air into the battery outer box 1 through the top inlet hole 3. The air enters through the top inlet hole 13 on the inner box cover 6 corresponding to the top inlet hole 3, directly blows and cools the battery cell, and fills into the inner cavity of the entire battery inner box assembly, thereby directly cooling the battery cell body. The air can be discharged through the guide outlet hole 16 to the next battery inner box assembly, and finally discharged through the air outlet 4 on the battery outer box 1 after circulating in turn. It should be noted that since the guide outlet hole 16 and the butt joint hole 15 are both designed as openings close to the front end of the battery cell, based on single circulation, the cold air realizes a complete annular circulation in the battery inner box assembly and is finally discharged to the next circulation loop through the front end opening, so that the inner cavity of each battery inner box assembly can be uniformly cooled.

[0021] Basic principle: The three-dimensional circulating heat conduction air duct structure designed by combining the transverse circulating air duct and the longitudinal circulating air duct provides a novel multi-directional and three-dimensional built-in heat conduction structure for the stacked energy storage battery box. Specifically, the independent heat conduction partitions matched with the transverse circulating air flow and the longitudinal circulating air flow are also stacked to form a three-dimensional heat conduction area, thereby providing a heat dissipation mode integrating wrapping, insertion and filling for the energy storage battery box. The problems of poor air duct and uneven heat dissipation caused by the single heat dissipation air duct of the traditional battery box after stacking are solved, and the heat dissipation efficiency is improved.

[0022] Example two Referring to Figure 3 , Figure 5 and Figure 8 , Figure 9As shown, the inside of the inner box seat 5 and the inner box cover 6 is used for the storage of the battery cell, and the inner box seat 5, the inner box cover 6 and the liquid cooling seat 7 are longitudinally uniformly arranged with liquid cooling pipes 9 connected with the circulating pump, the inner ring side of the liquid cooling pipe 9 is in direct contact with the battery cell; the liquid cooling seat 7 is embedded in the middle part of the inner box cover 6, and the top part of the liquid cooling seat 7 includes a connected horizontal structure and an inclined structure, and the horizontal structure is close to the opening side of the battery outer box 1; It is important to note that: the liquid cooling pipe 9 arranged in the liquid cooling seat 7 including the horizontal structure and the inclined structure realizes direct contact type liquid cooling heat transfer, and the horizontal structure and the inclined structure of the liquid cooling seat 7 provide transverse circulating air duct and longitudinal circulating air duct for air cooling transmission between the gaps of the stacked battery inner box assembly.

[0023] The inner wall of the inner box seat 5 and the inner box cover 6 is jointly installed with a heat conduction ring 14, the liquid cooling pipe 9 is embedded in the inner bottom middle part of the heat conduction ring 14, the heat conduction ring 14 is a discontinuous broken structure in the vertical direction corresponding to the embedding of the liquid cooling pipe 9, and the heat conduction ring 14 is also provided with a circular hole corresponding to the guide hole 16; This embodiment combines example one, and forms transverse circulating air duct and longitudinal circulating air duct, and also assists liquid cooling heat dissipation design, specifically, through the longitudinal circulating air duct in the battery inner box assembly, the heat conduction ring 14 is added at the position of the longitudinal circulating air duct, the heat conduction ring 14 is in direct contact with the battery cell and coincides with the longitudinal circulating air duct, thereby synchronously completing the triple heat conduction structure design of air cooling-liquid cooling-heat transfer on the basis of longitudinal circulating ventilation, realizing direct heat dissipation of the energy storage battery box for the stacked energy storage battery, matching the problem of local thermal runaway risk easily occurring in high-power charging and discharging scene, and also being able to realize air duct smooth and uniform heat dissipation according to the three-dimensional heat dissipation structure layout, and improving the heat dissipation efficiency.

[0024] Example three: Referring to Figure 1 - Figure 10 As shown, this embodiment combines the technical content of example one and example two, and forms a stacked energy storage battery box heat dissipation method with an embedded heat conduction structure as follows: The transverse air cooling circulation mode: the axial flow fan 18 blows air inward through the top part of the air blowing duct 8, and enters the battery inner box assembly gap through the side inlet hole 12 under the guidance of the air guide plate 11, and continues to enter the battery inner box assembly through the top inlet hole 13 when filling, thereby providing air source for longitudinal heat conduction circulation; Longitudinal air cooling circulation mode: the axial flow fan 18 blows air into the battery outer box 1 through the top inlet 3, the air enters through the top inlet hole 13 on the inner box cover 6 corresponding to the top inlet 3, and directly blows the air cooling to the whole battery inner box assembly, and finally discharges through the air outlet 4 on the battery outer box 1; Liquid cooling mode: the liquid cooling pipe 9 arranged in the liquid cooling seat 7 with horizontal structure and inclined structure realizes direct contact liquid cooling heat transfer, and the horizontal structure and inclined structure of the liquid cooling seat 7 provide transverse circulation air duct and longitudinal circulation air duct for the air cooling transmission of the gap between the stacked battery inner box assemblies, and the combination of the two can realize the double heat conduction of air cooling + liquid cooling for the battery cell; Heat conduction mode: the heat conduction ring 14 is added at the position of the longitudinal circulation air duct, the heat conduction ring 14 is in direct contact with the battery cell and coincides with the longitudinal circulation air duct, so that the three heat conduction structure design of air cooling-liquid cooling-heat transfer is completed on the basis of longitudinal circulation ventilation, and the direct heat dissipation of the energy storage battery box for the stacked energy storage battery is realized, and the problem of local thermal runaway risk in high-power charging and discharging scene is matched.

[0025] In summary: the three embodiments of the present application are combined, first, the three-dimensional circulation heat conduction air duct structure design combining the transverse circulation air duct and the longitudinal circulation air duct is adopted, a novel multi-directional and three-dimensional built-in heat conduction structure is provided for the stacked energy storage battery box, and the independent heat conduction partition cooperating with the intersecting transverse circulation air flow and longitudinal circulation air flow is also stacked to form a three-dimensional heat conduction area; And the liquid cooling combined with the heat conduction is used as a common heat dissipation mode to form a triple heat conduction structure design of air cooling + liquid cooling + heat conduction, so as to realize the direct heat dissipation of the energy storage battery box for the stacked energy storage battery, and match the problem of local thermal runaway risk in high-power charging and discharging scene; Thus, the energy storage battery box is provided with a heat dissipation mode integrating wrapping, insertion and filling, and the problems of poor air duct and uneven heat dissipation caused by single heat dissipation air duct of the traditional battery box after stacking are solved, and the heat dissipation efficiency is improved.

[0026] The above content is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the present application or exceed the scope defined by the present application, which shall belong to the protection scope of the present application.

Claims

1. A stacked energy storage battery box with a built-in thermally conductive structure, characterized in that, The system includes an inner battery casing assembly stacked within an outer battery casing. Symmetrical air ducts are arranged on the inner side of the outer battery casing, and a turbulence frame is provided on the inner side of each air duct. The inner wall of the air ducts has side inlets aligned horizontally with the gap between the inner battery casing assemblies. The air ducts, side inlets, and the gap between the inner battery casing assemblies together form a transverse circulating air duct. The inner battery casing assembly includes an inner casing base and an inner casing cover. A liquid cooling base is embedded in the upper center of the inner casing cover. A guide outlet and a top inlet are respectively provided in the longitudinal center of the inner casing base and the liquid cooling base. The top inlet and guide outlet, together with the inner cavity of the inner battery casing assembly, form a longitudinal circulating air duct. The transverse and longitudinal circulating air ducts together form a three-dimensional annular heat-conducting air duct. The inner housing, inner housing cover, and liquid cooling base are longitudinally and evenly arranged with liquid cooling pipes connected to the circulating pump. The inner ring side of the liquid cooling pipes is in direct contact with the battery cell. The top inlet is opened in the middle of the inclined structure on the liquid cooling base, and the front end of the top inlet is connected to a docking hole provided on the horizontal structure on the liquid cooling base. The docking hole is vertically aligned with the guide hole. The liquid cooling pipes are evenly distributed below the liquid cooling base. A heat-conducting ring is installed between the inner walls of the inner housing and the inner housing cover. The liquid cooling pipe is embedded in the middle of the inner bottom of the heat-conducting ring. The heat-conducting ring is a discontinuous broken structure in the vertical direction corresponding to the embedding of the liquid cooling pipe, and a circular hole is also opened simultaneously for the guide hole of the heat-conducting ring.

2. The stacked energy storage battery box with a built-in thermally conductive structure according to claim 1, characterized in that, An axial flow fan for air input is installed on the air duct, and the air duct is connected to the internal space of the battery inner box assembly.

3. The stacked energy storage battery box with a built-in thermally conductive structure according to claim 1, characterized in that, The interior of the inner casing and the inner casing cover are used together for storing the battery cells.

4. A stacked energy storage battery box with a built-in thermally conductive structure according to claim 3, characterized in that, The liquid cooling base is embedded in the middle of the inner box cover, and the top of the liquid cooling base includes a horizontal structure and an inclined structure connected together, with the horizontal structure close to the opening side of the battery outer box.

5. A stacked energy storage battery box with a built-in thermally conductive structure according to claim 1, characterized in that, The front end of the battery casing is equipped with a side cover plate. The upper center of the battery casing corresponding to the top inlet hole is provided with a top air inlet. The bottom of the battery casing is a sunken structure with an air outlet in the center. The air outlet is vertically aligned with the guide hole.

6. A stacked energy storage battery box with a built-in thermally conductive structure according to claim 1, characterized in that, The turbulence frame has a right-angled triangular structure, and there is a gap between the near outer end of the turbulence frame and the outer inner wall of the blower duct.

7. A stacked energy storage battery box with a built-in thermally conductive structure according to claim 6, characterized in that, Each inner box seat has a mounting platform corresponding to the turbulence frame installed on its outer side. The inner wall of the blower duct on the outer side is equipped with an air guide plate parallel to the lower wall of the turbulence frame. The other end of the air guide plate has a gap with the inner wall of the blower duct, and the air guiding direction of the air guide plate is aligned with the side inlet hole.

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