High-integration air-cooled PACK and assembly

Abstract

The invention relates to the technical field of PACK air cooling, in particular to a high-integration air cooling PACK and an assembly. Comprising a box body, the box body is provided with limiting pieces capable of limiting battery cells, the two battery cells are oppositely arranged in the box body through the limiting pieces in the long edge direction of the box body, and a main heat dissipation air channel capable of guiding an air source to pass through is defined between the two battery cells; the heat dissipation module is detachably arranged in the box body, the heat dissipation module is provided with a plurality of air duct brackets capable of guiding air flow circulation, and the plurality of air duct brackets are vertically arranged between the plurality of adjacent battery cells; the air duct bracket is matched with the adjacent battery cells to form a plurality of branch heat dissipation air ducts, and each branch heat dissipation air duct is communicated with the main heat dissipation air duct; the circulation module is fixedly arranged at one end of the box body, and the suction end of the circulation module communicates with the main heat dissipation air channel; the structure is compact, a wind source can be effectively guided to efficiently and comprehensively dissipate heat of the battery cell, the heat dissipation efficiency is high, and the effect is good.

Description

TECHNICAL FIELD

[0001] The application relates to the PACK air cooling technical field, in particular to a high-integration air-cooled PACK and an assembly. BACKGROUND

[0002] In an energy storage system, the PACK is an important carrier for cell integration management and heat control, and the heat dissipation structure thereof has a direct impact on the safety, reliability and energy density of the system. The existing air-cooled PACK structure generally adopts a two-row cell arrangement mode, and the cells are mainly distributed on both sides of the main air duct, and the cells are cooled by the lateral air duct. In such a traditional structure, the air flow path is relatively single, and the air flow mainly enters from the side of the cell, which cannot effectively cover the top area of the cell, resulting in insufficient cooling of the aluminum row and the tab area. At the same time, there is a difference in air resistance between the outer side and the inner side of the cell, which easily causes insufficient cooling air flow to the internal cells, thereby producing a significant temperature difference, affecting the consistency and cycle performance of the cell group.

[0003] On the other hand, due to the limited number and fixed layout of the air ducts between the cells, the integration degree of the existing air-cooled PACK is limited, and it is difficult to arrange more cells in a limited space, resulting in a low overall energy density. In addition, the traditional PACK air duct support is usually a single-column structure, and the bearing capacity and structural stability are insufficient, which can easily cause the air duct to deform due to changes in air pressure or assembly stress during long-term operation, further affecting the air flow distribution and heat dissipation efficiency.

[0004] At the same time, in terms of the box structure, the existing air-cooled PACK usually adopts a fixed size or regular arrangement mode for the opening of the box wall, which is difficult to dynamically adjust according to the air flow demand of different positions, resulting in uneven air flow distribution, insufficient heat dissipation in local areas, and high temperature rise of the aluminum row at the end and the cells close to the end plate. In addition, the existing support material is mainly ordinary engineering plastic, which has limited temperature resistance, flame retardance and mechanical strength, and is not conducive to meeting the long-term stable operation requirements of high-energy-density energy storage systems.

[0005] In summary, the traditional air-cooled PACK generally has problems such as poor temperature uniformity, low energy density, insufficient top heat dissipation capacity, uneven air flow distribution and poor structural stability, which is difficult to meet the requirements of the new generation of energy storage systems for high integration, high heat dissipation efficiency and high safety. SUMMARY

[0006] In view of the above problems, a high-integration air-cooled PACK and an assembly are provided, which can not only have a compact layout, but also can dynamically adjust the air cooling demand according to the air flow demand of different positions and can efficiently cool the cells, thereby solving the technical problems of low heat dissipation efficiency and uneven air flow distribution of the existing air-cooled assembly, which can easily lead to insufficient heat dissipation in local areas.

[0007] To solve the prior art problems, the application provides a high-integration air-cooled PACK and assembly for heat dissipation of battery cells, comprising: a box body provided with a limiting piece capable of limiting the battery cells, two groups of battery cells are oppositely arranged in the box body along the long side direction of the box body through the limiting piece, and a main heat dissipation air duct capable of guiding the wind source to pass through is formed between the two groups of battery cells; a heat dissipation module is detachably arranged in the box body, the heat dissipation module is provided with a plurality of air duct supports capable of guiding the airflow circulation, and the plurality of air duct supports are arranged between a plurality of adjacent battery cells in a vertical state; the air duct support and the adjacent battery cell cooperate to form a plurality of branch heat dissipation air ducts, and each branch heat dissipation air duct is communicated with the main heat dissipation air duct; and a circulation module is fixedly arranged at one end of the box body and communicated with the main heat dissipation air duct through the suction end.

[0008] Preferably, the air duct support is an integral injection molding structure, provided with a plurality of transverse support sections extending along the short side direction of the box body and a plurality of longitudinal limiting sections extending along the height direction of the box body; the plurality of transverse support sections and the plurality of longitudinal limiting sections are used to limit the cell spacing and form the branch heat dissipation channels between the battery cells.

[0009] Preferably, the plurality of transverse support sections and the plurality of longitudinal limiting sections are arranged in a grid shape in a staggered manner; the longitudinal limiting section is provided with at least three, the first longitudinal limiting section and the second longitudinal limiting section are oppositely fixedly arranged at both ends of the plurality of transverse support sections; to equidistantly fix the plurality of transverse support sections; the third longitudinal limiting section is vertically arranged at the middle of the plurality of transverse support sections, and the plurality of transverse support sections are divided into a first flow guide area and a second flow guide area, and the third longitudinal limiting section is used to limit and separate the battery cells.

[0010] Preferably, the bottom of the third longitudinal limiting section is further provided with a first notch capable of communicating the first flow guide area and the second flow guide area, a second notch provided on the transverse support section at the first flow guide area and capable of guiding the wind source to conduct towards the first notch, and a third notch provided on the transverse support section at the second flow guide area and capable of guiding the wind source to longitudinally enter the second flow guide area.

[0011] Preferably, the side wall of the box body is provided with a plurality of air inlet holes arranged equidistantly along the direction of the main heat dissipation air duct, and the sizes of the air inlet holes at different positions are changed according to the air path demand, so as to realize the air volume matching of different branch heat dissipation air ducts.

[0012] Preferably, the box body further comprises a battery cell end plate and an elastic buffer layer arranged between the battery cell end plate and the battery cell, and the elastic buffer layer is used to form a top heat dissipation air duct close to the end plate in a pre-tightening state.

[0013] Preferably, the rear side of the box body is further provided with a ventilation hole corresponding to the aluminum row of the battery cell, so as to dissipate heat at the top of the battery cell.

[0014] Preferably, the circulating module is provided with a heat dissipation fan in communication with the main heat dissipation air duct, so that the main air duct forms a negative pressure state when the fan works, thereby driving natural wind to flow into the box body.

[0015] The present application has the following advantages over the prior art: The present application can not only tightly arrange the two rows of battery cells on the left and right sides, so that the air-cooled PACK is basically the same as the liquid-cooled PACK of the same type, or even smaller, but also has good temperature uniformity, and the unique heat dissipation air duct design can realize heat dissipation on the side and top of the battery cell, greatly improving the temperature uniformity and effectively reducing the temperature of the PACK connecting row. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a high-integration air-cooled PACK and assembly Figure 1 .

[0017] Figure 2 is a high-integration air-cooled PACK and assembly

[0018] Figure 3 is Figure 2 A-A cross-sectional view of the sectional view.

[0019] Figure 4 is a high-integration air-cooled PACK and assembly

[0020] Figure 5 is Figure 4 B local enlarged view of the sectional view.

[0021] Figure 6 is a high-integration air-cooled PACK and assembly Figure 2 .

[0022] Figure 7 is a high-integration air-cooled PACK and assembly

[0023] Figure 8 is a high-integration air-cooled PACK and assembly

[0024] Reference numerals in the drawings are: 1, box body; 11, limiting piece; 12, battery cell; 13, main heat dissipation channel; 14, air inlet hole; 15, battery cell end plate; 16, elastic buffer layer; 17, air vent; 2, heat dissipation module; 21, air duct support; 211, transverse support section; 212, longitudinal limiting section; 213, first notch; 214, second notch; 215, third notch; 216, third longitudinal limiting section; 3, circulating module; 31, heat dissipation fan. DETAILED DESCRIPTION

[0025] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0026] Referring to Figures 1 to 8 As shown: a high-integration air-cooled PACK and assembly for heat dissipation of the battery cell 12, comprising: a box body 1 provided with a limiting piece 11 capable of limiting the battery cell 12, two groups of battery cells 12 are arranged in the box body 1 along the long side direction of the box body 1 through the limiting piece 11, and a main heat dissipation air duct 13 capable of guiding the wind source to pass through is formed between the two groups of battery cells 12; a heat dissipation module 2 is detachably arranged in the box body 1, the heat dissipation module 2 is provided with a plurality of air duct supports 21 capable of guiding air circulation, and a plurality of air duct supports 21 are arranged in a vertical state between a plurality of adjacent battery cells 12; the air duct support 21 and the adjacent battery cell 12 cooperate to form a plurality of branch heat dissipation air ducts, and each branch heat dissipation air duct is in communication with the main heat dissipation air duct 13; a circulation module 3 is fixedly arranged at one end of the box body 1 and the suction end is in communication with the main heat dissipation air duct 13.

[0027] Under the natural heat dissipation working condition, the ambient air first enters the inside of the box body 1 along the side wall area of the box body 1, and the external natural wind is introduced into the internal airflow channel through the air inlet hole of the side wall of the box body 1 under the action of the pressure difference. When the natural wind enters the inside of the box body 1, the airflow will directly flow into the air duct support 21 arranged between the adjacent battery cells 12, and flow to the main heat dissipation air duct 13 along the plurality of branch air ducts formed by the air duct support 21. In this process, the airflow successively adheres to the surface of the air duct support 21 and the surface of the plurality of battery cells 12 corresponding to the two sides of the air duct support 21, forming a natural convection heat exchange path covering the side surface of the battery cell 12, thereby realizing the basic heat dissipation and temperature balance of the plurality of battery cells 12 under the condition that the battery cell is in low load or normal temperature.

[0028] Under the active heat dissipation working condition, the circulation module 3 is started and continuously sucks the air in the main heat dissipation air duct 13, so that the main heat dissipation air duct 13 forms a stable negative pressure area. The establishment of negative pressure promotes the natural air inlet of each air duct support 21 arranged on both sides of the box body 1 to be converted into an active air suction port, so that the external air quickly enters the inside of the box body 1 and flows to the main heat dissipation air duct 13 through each branch air duct. Through this active suction mode, the airflow velocity and heat exchange efficiency in the inside of the box body 1 can be significantly improved, so that the natural wind forms a high-efficiency continuous convection in the inside of the box body 1, further enhancing the heat dissipation capacity of the side surface and the top area of the battery cell 12, thereby realizing rapid and stable temperature control when the PACK is in a high load or high ambient temperature condition.

[0029] By combining natural heat dissipation and active negative pressure exhaust, the air forms a high-efficiency, continuous and evenly-covered convection path in the air duct support 21 and the main heat dissipation air duct 13, thereby significantly improving the overall heat dissipation capacity and temperature consistency of the multiple columns of battery cells 12.

[0030] As shown in Figure 7 The air duct support 21 is an integral injection molding structure, provided with multiple transverse support sections 211 extending along the short side direction of the box body 1 and multiple longitudinal limiting sections 212 extending along the height direction of the box body 1; the multiple transverse support sections 211 and the multiple longitudinal limiting sections 212 are used to limit the spacing of the battery cells 12 and form the branch heat dissipation channels between the battery cells 12.

[0031] The transverse support sections 211 constitute multiple air inlet channels for the air source conduction, so that the natural wind sequentially passes through each air inlet channel after entering the box body 1 and uniformly takes away the heat on the surface of the battery cells 12 and the air duct support 21 during the flow process, thereby establishing a heat dissipation airflow path covering the multiple columns of battery cells 12. In addition, the installation direction of the air duct support 21 in the left and right two columns of battery cells 12 is reversely arranged relative to the main heat dissipation air duct 13, so that the branch heat dissipation air ducts formed on both sides are approximately symmetrical in geometry, so as to improve the uniformity of the branch airflow distribution and improve the overall heat dissipation efficiency.

[0032] As shown in Figure 7 and Figure 8 The multiple transverse support sections 211 and the multiple longitudinal limiting sections 212 are arranged in a grid shape in a transverse and longitudinal staggered manner; the longitudinal limiting sections 212 are provided with at least three, the first longitudinal limiting section and the second longitudinal limiting section are oppositely fixed on both ends of the multiple transverse support sections 211; for equidistantly fixing the multiple groups of transverse support sections 211; the third longitudinal limiting section 216 is vertically arranged at the middle part of the multiple transverse support sections 211 and divides the multiple transverse support sections 211 into a first flow guide area and a second flow guide area, and the third longitudinal limiting section 216 is used to limit and separate the battery cells 12.

[0033] The thicknesses of the first longitudinal limiting section and the second longitudinal limiting section are both less than the thickness of the transverse support section 211, so as to reduce the airflow resistance and reduce the occupied space of the heat dissipation channel by the structure, thereby improving the effective ventilation area of the overall heat dissipation area while maintaining the limiting strength. The third longitudinal limiting section 216 is fixed in a vertical manner at the middle position of the multiple transverse support sections 211, so that it and the first longitudinal limiting section and the second longitudinal limiting section jointly constitute a cross-shaped division frame structure; through the cross-shaped division frame, the positions of the adjacent battery cells 12 can be accurately, equidistantly and multidirectionally constrained, so as to ensure that the battery cells 12 maintain stable arrangement during the module pre-tightening and long-term operation, and form regular and equal-width heat dissipation channels between the battery cells 12.

[0034] As shown in Figure 7 andFigure 8 As shown: the bottom of the third longitudinal limiting section 216 is also provided with a first gap 213 capable of communicating the first and second flow guide areas, a second gap 214 provided on the first flow guide area of the transverse support section 211 capable of guiding the wind source to conduct towards the first gap 213, and a third gap 215 provided on the second flow guide area of the transverse support section 211 capable of guiding the wind source to longitudinally enter the second flow guide area.

[0035] The first gap 213 and the third gap 215 are used to reduce the local airflow resistance and improve the airflow distribution inside the air guide.

[0036] In the first flow guide area, the first gap 213 provided on the transverse support section 211 is used to guide the natural wind entering the inside of the box 1 to the internal area of the first flow guide area, so that the airflow converges to the second gap 214 along the set flow guide direction after completely filling the first flow guide area, and flows into the second flow guide area through the second gap 214, realizing the continuous distribution and transition of the air volume between the double flow guide areas. Further, the third gap 215 is provided on the transverse support section 211 of the second flow guide area to receive the longitudinal airflow flowing from the top area of the box 1, so that the top hot air can be actively introduced into the inside of the second flow guide area and form a superposition with the airflow entering from the first flow guide area, thereby enhancing the overall heat dissipation capacity of the second flow guide area to the battery cell 12 and the adjacent structure.

[0037] The hierarchical flow guide path formed by the multiple gaps realizes the collaborative convergence and effective distribution of the lateral and top airflows, thereby significantly improving the heat dissipation efficiency and airflow coverage uniformity of the double flow guide areas.

[0038] Referring to Figure 6 As shown: the side wall of the box 1 is provided with multiple groups of air inlet holes 14 arranged equidistantly along the direction of the main heat dissipation air duct 13, and the sizes of the air inlet holes 14 at different positions vary according to the air flow demand to realize the air volume matching of different branch heat dissipation air ducts.

[0039] The side wall of the box 1 is provided with multiple groups of air inlet holes 14 arranged equidistantly along the direction of the main heat dissipation air duct 13, and each air inlet hole 14 adopts different aperture size and opening area configuration according to its position and the air flow demand of the corresponding branch heat dissipation air duct, so that the external air can realize accurate airflow distribution according to the resistance characteristics and heat dissipation demand of each branch heat dissipation air duct when entering the box 1. Through the above design of air inlet holes 14 with variable sizes, the branch heat dissipation air ducts at different positions can obtain matched air inlet volume in actual operation, thereby ensuring that the overall airflow distribution in the box 1 is more balanced and the heat dissipation consistency of the battery cells 12 in each area is strengthened.

[0040] Referring to Figure 4As shown: the box 1 further comprises the cell end plate 15 and the elastic buffer layer 16 arranged between the cell end plate 15 and the cell 12, the elastic buffer layer 16 is used to form the top heat dissipation air duct close to the end plate in the pre-tightening state.

[0041] The box 1 further comprises the cell end plate 15 arranged at both ends of the cell 12 assembly, and the elastic buffer layer 16 arranged between the cell end plate 15 and the adjacent cell 12. The elastic buffer layer 16 is compressed to a set deformation amount in the pre-tightening state of the module, so that a stable and continuous top heat dissipation air duct is formed between the upper end surface of the cell 12 and the end plate; the heat dissipation air duct is used to guide the air flow in the top area inside the box 1, so as to realize effective heat exchange of the top of the cell 12. The elastic buffer layer 16 provides pre-tightening buffering and energy absorption, and at the same time, the gap structure formed after the elastic buffer layer 16 is compressed realizes the construction of the top air flow path, so as to further improve the heat dissipation capacity of the top area of the cell 12 on the basis of ensuring the structural stability of the cell 12.

[0042] Referring to Figure 6 As shown: the rear side of the box 1 is also provided with the ventilation hole 17 corresponding to the aluminum row of the cell 12, for heat dissipation of the top of the cell 12.

[0043] The rear side wall of the box 1 is provided with the ventilation hole 17 corresponding to the position of the aluminum row of the cell 12, the ventilation hole 17 communicates with the top heat dissipation area inside the box 1, and is used to guide the external air to enter the upper space of the position where the aluminum row of the cell 12 is located during the operation of the equipment, so as to form a direct heat dissipation air flow path for the top of the cell 12 and the aluminum row area. By arranging the ventilation hole 17 corresponding to the aluminum row on the rear side of the box 1, the air in the top high-temperature area can be discharged in time and exchanged with the external cold air, the heat exchange efficiency of the top area of the cell 12 is improved, and the temperature control capacity of the entire cell 12 assembly is enhanced.

[0044] Referring to Figure 4 As shown: the circulation module 3 is provided with the heat dissipation fan 31 communicating with the main heat dissipation air duct 13, so that the main air duct forms a negative pressure state when the fan works, thereby driving the natural wind to flow into the inside of the box 1.

[0045] The circulation module 3 comprises the heat dissipation fan 31 communicating with the main heat dissipation air duct 13, and the heat dissipation fan 31 continuously sucks the air inside the main heat dissipation air duct 13 when working, so that the main heat dissipation air duct 13 forms a negative pressure area relative to the outside of the box 1. Through the negative pressure effect, the external natural wind can be automatically driven to flow into the inside of the box 1 from the air inlet hole 14 of the side wall of the box 1 and the inlet of the branch heat dissipation air duct during the working of the fan, and then enters the main heat dissipation air duct 13 along the preset flow guide path, so as to establish a stable and continuous air flow circulation system, and realize active heat dissipation of the cell 12 assembly.

[0046] The application is compact in structure and can effectively guide the wind source to efficiently and comprehensively cool the battery cell, and has high cooling efficiency and good effect.

[0047] The above embodiments only express one or several embodiments of the application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the application, several modifications and improvements can be made, which belong to the protection scope of the application. Therefore, the protection scope of the application should be subject to the appended claims.

Claims

1. A high-integration air-cooled PACK and assembly for dissipating heat from a battery cell, characterized by, The application relates to a battery box. The battery box comprises a box body provided with limiting members capable of limiting the positions of battery cells, two groups of battery cells are oppositely arranged in the box body along the long side direction of the box body through the limiting members, and a main heat dissipation air duct capable of guiding the passage of a wind source is formed between the two groups of battery cells. A heat dissipation module is detachably arranged in the box body, the heat dissipation module is provided with a plurality of air duct supports capable of guiding the circulation of air flow, the plurality of air duct supports are arranged between a plurality of adjacent battery cells in a vertical state, the air duct supports and the adjacent battery cells cooperatively form a plurality of branch heat dissipation air ducts, and each branch heat dissipation air duct is in communication with the main heat dissipation air duct. A circulation module is fixedly arranged at one end of the box body and has a suction end in communication with the main heat dissipation air duct.

2. A high-integration forced air cooling PACK and assembly according to claim 1, characterized in that, The air duct support is an integral injection molding structure and is provided with a plurality of transverse supporting sections extending along the short side direction of the box body and a plurality of longitudinal limiting sections extending along the height direction of the box body; the plurality of transverse supporting sections and the plurality of longitudinal limiting sections are used for limiting the spacing of the battery cells and forming branch heat dissipation channels between the battery cells.

3. A high-integration forced air cooling PACK and assembly according to claim 2, characterized in that, The plurality of transverse supporting sections and the plurality of longitudinal limiting sections are arranged in a grid shape in a horizontal and vertical staggered manner. The longitudinal limiting section is provided with at least three first longitudinal limiting sections and second longitudinal limiting sections oppositely fixedly arranged at two ends of the plurality of transverse supporting sections; the first longitudinal limiting sections and the second longitudinal limiting sections are used for equidistantly fixing the plurality of transverse supporting sections. A third longitudinal limiting section is vertically arranged at the middle part of the plurality of transverse supporting sections and divides the plurality of transverse supporting sections into a first flow guide area and a second flow guide area; the third longitudinal limiting section is used for limiting and separating the battery cells.

4. The high-integration forced air cooling PACK and assembly according to claim 3, characterized in that, The bottom of the third longitudinal limiting section is further provided with a first notch capable of communicating the first flow guide area and the second flow guide area, a second notch provided on the transverse supporting section of the first flow guide area and capable of guiding the wind source to conduct towards the first notch, and a third notch provided on the transverse supporting section of the second flow guide area and capable of guiding the wind source to longitudinally enter the second flow guide area.

5. The high-integration forced air cooling PACK and assembly according to claim 1, characterized in that, The side wall of the box body is provided with a plurality of air inlet holes equidistantly arranged along the direction of the main heat dissipation air duct; the sizes of the air inlet holes at different positions are changed according to the air path demand, so as to realize the air volume matching of the branch heat dissipation air ducts.

6. A high-integration forced air cooling PACK and assembly according to claim 5, characterized by, The box body further comprises a battery cell end plate and an elastic buffer layer arranged between the battery cell end plate and the battery cells; the elastic buffer layer is used for forming a top heat dissipation air duct close to the end plate in a pre-tightening state.

7. A high-integration forced air cooling PACK and assembly according to claim 6, characterized by, The rear side of the box body is further provided with a ventilation hole corresponding to the aluminum row of the battery cells and used for dissipating heat from the top of the battery cells.

8. A high-integration forced air cooling PACK and assembly according to claim 1, characterized by, The circulation module is provided with a heat dissipation fan in communication with the main heat dissipation air duct; the main air duct forms a negative pressure state when the fan works, so as to drive the natural wind to flow into the box body.

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