Air-cooled battery pack

Abstract

The utility model relates to the field of energy storage battery packs, in particular to an air-cooled battery pack which comprises a hollow lower box body and a hollow upper box body, the upper box body is arranged at the top of the lower box body, and the upper box body is a bottomless upper box body; an air inlet is formed in one end of the lower box body in the length direction, the lower box body and the upper box body are communicated, two groups of battery cell components are arranged in the upper box body, each group of battery cell components comprises a plurality of battery cells, the thickness direction of each battery cell is consistent with the length direction of the upper box body, a heat dissipation opening is formed in one end of the upper box body far away from the air inlet, and two groups of supporting components are arranged on the lower box body. Each supporting assembly comprises a plurality of first supporting blocks, a heat dissipation groove is formed between every two adjacent first supporting blocks in each supporting assembly, an air inlet channel is formed between each first supporting block and the corresponding side vertical face of the lower box body, and an air outlet channel is formed between every two corresponding first supporting blocks in the two supporting assemblies. According to the technical scheme, the problems of uneven heat dissipation and low structural strength are solved.

Description

Technical Field

[0001] This utility model relates to a battery pack, specifically an air-cooled battery pack. Background Technology

[0002] An air-cooled battery pack is formed by connecting a large number of individual battery cells in series and parallel to form a battery module, which is then placed inside a casing to form the battery pack. During charging and discharging, the battery pack continuously generates heat, and temperature differences arise between the cells, affecting the charging and discharging power of the battery pack and the lifespan of the cells. Therefore, air cooling is necessary to dissipate heat from the battery pack.

[0003] Patent CN218568987U discloses an air-cooled battery pack, which includes a housing and at least two cell module units. A first air duct is formed between two adjacent cell module units. Each cell module unit includes several cells arranged at intervals along a second direction. A second air duct is provided between two adjacent cells and is connected to the first air duct. A triangular guide plate is provided at one end of the first air duct and a fan is provided at the other end. The fan is configured to draw airflow from the environment into the second air duct and discharge it through the first air duct, or blow airflow from the environment into the first air duct and discharge it through the second air duct, so as to cool down the cell module units.

[0004] Patent CN221352944U discloses an air-cooled battery pack, including a battery box, a parallel air chamber, a receiving cavity, multiple battery modules, and an exhaust fan. The battery box has a first air inlet, which is connected to the outside of the battery box. The parallel air chamber is located inside the battery box and is connected to the first air inlet, and has parallel air vents. The receiving cavity is located inside the battery box, adjacent to the parallel air chamber, and is connected to the parallel air vents. Multiple battery modules are placed at intervals in the receiving cavity, and each battery module is composed of multiple batteries arranged sequentially. The exhaust fan is located on the battery box and is connected to the receiving cavity to exhaust hot air flowing through the receiving cavity.

[0005] In existing technologies, there are transverse air duct partitions between two cells in air-cooled battery packs. The cooling air does not flow evenly to each air duct partition, resulting in excessive temperature differences between adjacent cells and uneven heat dissipation, which makes it difficult to meet the heat dissipation requirements of high-capacity battery packs. Furthermore, the air duct partitions increase the volume of the battery pack, thereby reducing energy density and increasing the manufacturing cost of the battery pack.

[0006] Furthermore, in existing technologies, vertical air ducts in air-cooled battery packs are usually arranged along the thickness direction of the battery cells. The cooling airflow along the thickness direction of the battery cells has a significant heating effect, resulting in an excessive temperature difference between the battery cells at the front and rear air vents. This makes it difficult to meet the heat dissipation requirements of high-capacity battery packs. In addition, vertical air ducts reduce the structural strength of the battery pack, thereby reducing its lifespan and increasing the manufacturing cost of the battery pack. Utility Model Content

[0007] In order to solve the problems in related technologies, this utility model provides an air-cooled battery pack. This device solves the problems of uneven heat dissipation and reduced structural strength of air-cooled battery packs in the prior art.

[0008] To solve the above problems, the following technical solutions are provided:

[0009] A wind-cooled battery pack includes a lower housing and an upper housing, both hollow in shape. The upper housing is located on top of the lower housing and is bottomless. One end of the lower housing has an air inlet, and the other end has a first notch, connecting the lower and upper housings. Two sets of battery cell assemblies are housed within the upper housing. Each set includes multiple sequentially arranged battery cells, the thickness of which is aligned with the length of the upper housing. A heat dissipation vent is located at the end of the upper housing furthest from the air inlet, and a corresponding heat dissipation vent is located within the upper housing. The fan is characterized by having two sets of identical support components arranged along the length of the lower housing. Each set of support components includes multiple first support blocks arranged sequentially. There is a heat dissipation groove between two adjacent first support blocks in each set of support components. Each first support block is spaced apart from the corresponding side surface of the lower housing, so that an air intake channel is formed between each first support block and the corresponding side surface of the lower housing. There is also a space between two corresponding first support blocks in the two sets of support components, so that an air outlet channel is formed between two corresponding first support blocks in the two sets of support components.

[0010] Through the above technical solution, an air intake channel is formed between each first support block and the lower housing, a heat dissipation groove is formed between adjacent first support blocks, and an air outlet channel is formed between the corresponding two first support blocks in the two sets of support components. The lower housing and the upper housing are connected. When the battery pack generates heat in the working state, the fan drives the air inside the battery pack to flow. External air enters the lower housing from the air intake channels on both sides. As the external cold air flows along the air intake channels, the external cold air entering the lower housing in parallel can ensure the uniformity of the battery module cooling and avoid uneven heat dissipation caused by one end of the battery module cooling a large amount and the other end cooling a small amount, thereby ensuring the heat dissipation requirements of the battery pack.

[0011] Because the heat sink is connected to the air intake channel, some of the cold air from the outside will enter the heat sink and flow along the length of the heat sink. During this process, the heat generated by the battery module can be carried away through heat exchange and flow along the air outlet channel. Under the action of the fan, it is discharged from the heat dissipation port. Since the length of the heat sink and the battery cell are aligned, the temperature difference after the battery module is cooled can be reduced, thereby improving the cooling effect of the battery pack.

[0012] In addition, the two sets of support components can provide support for the battery module, thereby effectively improving the strength of the battery pack.

[0013] Furthermore, the gap between two adjacent cells in each group of the cell assembly is not a ventilation channel; there is a gap between the two groups of cell assemblies, and there is a gap between each group of cell assemblies and the corresponding side facade of the lower housing.

[0014] By using the above technical solution, a gap is set between the two sets of battery cell components, allowing air to flow along the strip-shaped gap, thereby ensuring the uniformity of cooling for each set of battery cell components and improving the heat dissipation effect.

[0015] Furthermore, it also includes two identical thermally conductive pads, both of which are arranged along the length of the lower housing and are respectively disposed on the top of the lower housing corresponding to the two sets of support components.

[0016] Through the above technical solution, the heat generated by the battery cell can be quickly transferred to the lower casing and support components by setting up thermal pads, thereby improving the heat dissipation effect.

[0017] Furthermore, a second support block is provided on the side of the lower box without a side cover near the first support block. The second support block is provided along the width direction of the lower box, and both ends of the second support block in the length direction are spaced apart from the corresponding side face of the lower box.

[0018] By using the above technical solution and the setting of the second support block, the support force on the battery module can be increased, thereby improving the strength of the battery pack.

[0019] Furthermore, two second notches are provided on the side of the second support block away from the first support block. The two second notches are symmetrically arranged along the centerline of the width direction of the lower box body. Each second notch is arranged in a right-angled triangle shape, so that the width of the second support block gradually decreases from the middle to both ends.

[0020] By using the above technical solution and setting the second notch, the width of the air inlet in the air intake channel can be increased, thereby increasing the air intake volume and improving the heat dissipation effect.

[0021] Furthermore, in each set of support components, a third support block is provided on the side away from the lower housing without a side cover. Each third support block is provided along the width direction of the lower housing. The ends of the two third support blocks that are far apart from each other in the length direction are connected to the side facade of the corresponding lower housing. The interval between the two third support blocks is greater than the interval between the two first support blocks.

[0022] By using the above technical solution and the addition of a third support block, the support force on the battery module can be increased, thereby improving the strength of the battery pack.

[0023] Furthermore, each of the third support blocks has a third notch at one end that is far apart from the other along its length, and each third notch is located on the side of the third support block closest to the first support block.

[0024] By using the above technical solution and the setting of the third notch, the length of the air intake channels on both sides can be extended, thereby improving the heat dissipation effect on the battery pack.

[0025] The above solution has the following advantages:

[0026] 1. By forming an air intake channel between each first support block and the lower housing, forming a heat dissipation groove between adjacent first support blocks, and forming an air outlet channel between corresponding two first support blocks in the two sets of support components, the lower housing and the upper housing are connected. When the battery pack generates heat during operation, the fan drives the air inside the battery pack to flow. External air enters the lower housing from the air intake channels on both sides. As the external cold air flows along the air intake channels, the external cold air entering the lower housing in parallel can ensure the uniformity of the battery module cooling and avoid uneven heat dissipation caused by one end of the battery module cooling a large amount and the other end cooling a small amount, thereby ensuring the heat dissipation requirements of the battery pack.

[0027] Because the heat sink is connected to the air intake channel, some of the cold air from the outside will enter the heat sink and flow along the length of the heat sink. During this process, the heat generated by the battery module can be carried away through heat exchange and flow along the air outlet channel. Under the action of the fan, it is discharged from the heat dissipation port. Since the length of the heat sink and the battery cell are aligned, the temperature difference after the battery module is cooled can be reduced, thereby improving the cooling effect of the battery pack.

[0028] In addition, the two sets of support components can provide support for the battery module, thereby effectively improving the strength of the battery pack.

[0029] 2. By setting a gap between the two sets of battery cell components, air can flow along the strip-shaped gap, thereby ensuring the uniformity of cooling of each set of battery cell components and improving the heat dissipation effect.

[0030] 3. By setting up thermal pads, the heat generated by the battery cells can be quickly transferred to the lower casing and support components, thereby improving the heat dissipation effect;

[0031] 4. By setting up the second support block, the support force on the battery module can be increased, thereby improving the strength of the battery pack;

[0032] 5. By setting a second notch, the width of the air inlet in the air intake channel can be increased, thereby increasing the air intake volume and improving the heat dissipation effect;

[0033] 6. By adding a third support block, the support force on the battery module can be increased, thereby improving the strength of the battery pack;

[0034] 7. By setting the third notch, the length of the air intake channels on both sides can be extended, thereby improving the heat dissipation effect on the battery pack. Attached Figure Description

[0035] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram of the structure of an air-cooled battery pack;

[0037] Figure 2 This is a schematic diagram of the internal structure of the lower casing of an air-cooled battery pack.

[0038] Figure 3 This is a schematic diagram of the structure of a thermally conductive pad in an air-cooled battery pack.

[0039] Figure 4 A top view of an air-cooled battery pack;

[0040] Figure 5 for Figure 4 A cross-sectional view from the perspective of the middle AA (analogous to ...

[0041] Figure 6 for Figure 5 A magnified view of part number B in the middle;

[0042] Explanation of reference numerals in the attached diagram: 1. Lower housing; 2. Upper housing; 3. First notch; 4. Battery cell; 5. Heat dissipation vent; 6. Fan; 7. First support block; 8. Heat dissipation groove; 9. Air inlet channel; 10. Air outlet channel; 11. Thermal pad; 12. Second support block; 13. Second notch; 14. Third support block; 15. Third notch; 16. Crossbeam; 17. End plate. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] In a specific embodiment, such as Figures 1-6 As shown, an air-cooled battery pack includes a lower housing 1 and an upper housing 2, both of which are hollow. The upper housing 2 is located on top of the lower housing 1 and is bottomless. One end of the lower housing 1 has an air inlet, and the other end has a first notch 3, connecting the lower housing 1 and the upper housing 2. Two sets of battery cell assemblies 4 are arranged inside the upper housing 2. Each set of battery cell assemblies includes multiple sequentially arranged battery cells 4. The thickness of each battery cell 4 is aligned with the length of the upper housing 2. A heat dissipation vent 5 is located at the end of the upper housing 2 furthest from the air inlet. A fan 6 is installed inside the upper housing 2 corresponding to the heat dissipation vent 5. The specific installation method of the fan 6 is prior art and will not be elaborated here. The fan 6 is selected to power the battery pack. The model for internal gas flow is sufficient and is existing technology, so it will not be elaborated on here; the fan 6 is turned on and off by remote control, which is a conventional technical means, so it will not be elaborated on here; two sets of identical support components are set along the length of the lower housing 1. Each set of support components includes multiple first support blocks 7 arranged in sequence. There is a heat dissipation groove 8 between two adjacent first support blocks 7 in each set of support components. There is a gap between each first support block 7 and the corresponding side surface of the lower housing 1, so that each first support block 7 and the corresponding side surface of the lower housing 1 form an air intake channel 9. There is a gap between two corresponding first support blocks 7 in the two sets of support components, so that two corresponding first support blocks 7 in the two sets of support components form an air outlet channel 10.

[0045] By forming an air intake channel 9 between each first support block 7 and the lower housing 1, forming a heat dissipation groove 8 between adjacent first support blocks 7, and forming an air outlet channel 10 between corresponding two first support blocks 7 in the two sets of support components, the lower housing 1 and the upper housing 2 are connected. When the battery pack generates heat in the working state, the fan 6 drives the air inside the battery pack to flow. External air enters the lower housing 1 from the air intake channels 9 on both sides. As the external cold air flows along the air intake channels 9, the external cold air entering the lower housing 1 in parallel can ensure the uniformity of the battery module cooling, avoid uneven heat dissipation caused by a large cooling range at one end and a small cooling range at the other end of the battery module, and thus ensure the heat dissipation requirements of the battery pack.

[0046] Because the heat sink 8 is connected to the air inlet channel 9, some of the cold air from the outside will enter the heat sink 8 and flow along the length of the heat sink 8. During this process, the heat generated by the battery module can be carried away through heat exchange and flows along the air outlet channel 10. Under the action of the fan 6, it is discharged from the heat outlet 5. Since the length of the heat sink 8 and the battery cell 4 are aligned, the temperature difference after the battery module is cooled can be reduced, thereby improving the cooling effect of the battery pack.

[0047] In addition, the two sets of support components can provide support for the battery module, thereby effectively improving the strength of the battery pack.

[0048] like Figure 5 and Figure 6 As shown, the gap between two adjacent cells 4 in each group of cell 4 is not a ventilation channel; there is a gap between the two groups of cell 4, and there is a gap between each group of cell 4 and the corresponding side panel of the lower housing 1, so that the gap between the two groups of cell 4 can be set. At this time, the air can flow along the strip gap, thereby ensuring the cooling uniformity of each group of cell 4 and improving the heat dissipation effect.

[0049] like Figure 3 and Figure 5 As shown, an air-cooled battery pack also includes two identical thermal pads 11. Both thermal pads 11 are arranged along the length of the lower housing 1, and the two thermal pads 11 are respectively arranged on the top of the lower housing 1 corresponding to the two sets of support components. The thermal pads 11 can quickly transfer the heat generated by the battery cell 4 to the lower housing 1 and the support components, thereby improving the heat dissipation effect.

[0050] like Figure 2 As shown, a second support block 12 is provided on the side of the first support block 7 near the side without a side cover in the lower housing 1. The second support block 12 is arranged along the width direction of the lower housing 1, and there is a gap between both ends of the second support block 12 and the corresponding side facade of the lower housing 1. The second support block 12 can increase the support force on the battery module, thereby improving the strength of the battery pack. Two second notches 13 are provided on the side of the second support block 12 away from the first support block 7. The two second notches 13 are symmetrically arranged along the center line of the width direction of the lower housing 1. Each second notch 13 is arranged in a right-angled triangle shape, so that the width of the second support block 12 gradually decreases from the middle to both ends. The second notches 13 can increase the width of the air inlet in the air inlet channel 9, and the width of the air inlet in the air inlet channel 9 can be adjusted during the production of the lower housing 1, thereby increasing the air intake and improving the heat dissipation effect.

[0051] like Figure 2As shown, each set of support components has a third support block 14 on the side away from the lower housing 1 without a side cover. Each third support block 14 is arranged along the width direction of the lower housing 1. The ends of two third support blocks 14 that are far apart in the length direction are connected to the corresponding side facade of the lower housing 1. The interval between two third support blocks 14 is greater than the interval between two first support blocks 7. The third support blocks 14 can increase the support force on the battery module, thereby improving the strength of the battery pack. Each third support block 14 has a third notch 15 on the end that is far apart in the length direction, and each third notch 15 is correspondingly arranged on the side of the third support block 14 closest to the first support block 7. The third notch 15 can extend the length of the air intake channels 9 on both sides, thereby improving the heat dissipation effect of the battery pack.

[0052] like Figure 5 As shown in this specific embodiment, an air-cooled battery pack further includes two sets of identical crossbeam 16 assemblies. Each set of crossbeam 16 assemblies includes two identical crossbeams 16. Each crossbeam 16 is arranged along the width direction of the lower housing 1, and the side surfaces of the two crossbeams 16 in each set of crossbeam 16 assemblies respectively abut against the side surfaces of the corresponding set of battery cell 4 assemblies along the length direction. The bottom of each crossbeam 16 is located at the top of the lower housing 1, and the top of each crossbeam 16 is fixedly provided with an end plate 17 for limiting the battery cell 4 assembly. The end plate 17 can also improve the stability of the battery cell 4 assembly installation.

[0053] Operation process: When the battery pack is in operation, the battery cell 4 will generate heat. The heat is transferred to the lower casing 1 through the thermal pad 11. The fan 6 is turned on, and the air inside the battery pack begins to flow. External cold air enters the air intake channels 9 on both sides of the lower casing 1 from the end without the side cover. As the cold air in each air intake channel 9 flows along the air intake channel 9, it will enter the heat dissipation groove 8 and flow along the heat dissipation groove 8. Finally, it will enter the air outlet channel 10. The air entering the air outlet channel 10 will be exhausted from the battery pack to the outside of the battery pack by the action of the fan 6. During the flow of cold air, the heat will be carried away and the cooling of each battery cell 4 will be even.

[0054] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components, and can be direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0055] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all implementation methods here, and any obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A wind-cooled battery pack, comprising a lower housing and an upper housing, both hollow in shape, the upper housing being disposed on top of the lower housing, the upper housing being a bottomless upper housing; an air inlet is provided at one end along the length of the lower housing, and a first notch is provided at the other end of the lower housing, making the lower housing and the upper housing connected; two sets of battery cell assemblies are disposed within the upper housing, each set of battery cell assemblies comprising multiple sequentially arranged battery cells, the thickness direction of each battery cell being consistent with the length direction of the upper housing; a heat dissipation vent is provided at the end of the upper housing away from the air inlet, and a fan is disposed within the upper housing corresponding to the heat dissipation vent, characterized in that... Two sets of identical support components are provided along the length of the lower housing. Each set of support components includes multiple first support blocks arranged sequentially. There is a heat dissipation groove between two adjacent first support blocks in each set of support components. There is a gap between each first support block and the corresponding side surface of the lower housing, so that an air intake channel is formed between each first support block and the corresponding side surface of the lower housing. There is a gap between two corresponding first support blocks in the two sets of support components, so that an air outlet channel is formed between two corresponding first support blocks in the two sets of support components.

2. The air-cooled battery pack as described in claim 1, characterized in that, The gap between two adjacent cells in each group of the cell assembly is not a ventilation channel; There is a gap between the two sets of battery cell assemblies, and there is a gap between each set of battery cell assemblies and the corresponding side facade of the lower housing.

3. The air-cooled battery pack as described in claim 1, characterized in that, It also includes two identical thermal pads, both of which are arranged along the length of the lower housing and are respectively located on the top of the lower housing corresponding to the two sets of support components.

4. The air-cooled battery pack as described in claim 1, characterized in that, A second support block is provided on the side of the lower box without a side cover near the first support block. The second support block is provided along the width direction of the lower box, and both ends of the second support block in the length direction are spaced apart from the corresponding side face of the lower box.

5. A wind-cooled battery pack as described in claim 4, characterized in that, Two second notches are provided on the side of the second support block away from the first support block. The two second notches are symmetrically arranged along the center line of the width direction of the lower box body. Each second notch is arranged in a right-angled triangle shape, so that the width of the second support block gradually decreases from the middle to both ends.

6. The air-cooled battery pack as described in claim 1, characterized in that, Each set of support components has a third support block on the side of the lower housing that is away from the side cover. Each third support block is arranged along the width direction of the lower housing. The ends of the two third support blocks that are far apart from each other in the length direction are connected to the side facade of the corresponding lower housing. The interval between the two third support blocks is greater than the interval between the two first support blocks.

7. A wind-cooled battery pack as described in claim 6, characterized in that, Each of the third support blocks has a third notch at one end that is far apart from the other along its length, and each third notch is located on the side of the third support block closest to the first support block.

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