Battery device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device which comprises at least one battery column formed by stacking a plurality of single batteries along the X direction; the box body is provided with a bottom plate which is relatively positioned below the battery column; the supporting plate is supported at the bottom of the battery column; the supporting piece is arranged between the bottom plate and the supporting plate, so that the bottom plate and the supporting plate are arranged at intervals; the extending direction of the supporting piece and the stacking direction of the at least one battery column form an angle alpha, and alpha is larger than 0 degree and smaller than or equal to 90 degrees. According to the battery device provided by the utility model, each battery column can be supported by a plurality of supporting pieces at the same time, even if one supporting piece is damaged, other supporting pieces can still play a role in supporting, so that the condition that the battery columns are inclined is avoided, the battery columns are effectively supported, and the service life of the battery columns is prolonged. And the stability of the battery pack is ensured while the heat dissipation performance of the battery pack is considered.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device. Background Art

[0002] While providing electrical energy, the battery pack also generates a large amount of heat. This heat will accelerate the aging of the battery and even pose the risk of explosion due to thermal runaway. In order to reduce the potential dangers caused by heat accumulation in the battery pack, good thermal management of the battery pack is required.

[0003] In the related art, an air cooling channel is often formed by suspending the bottom of the battery pack to cool down and dissipate heat. However, due to the heavy weight of the battery pack, if the supporting parts are damaged, it is easy to cause one or more battery columns or even the entire battery pack to collapse and misalign, which can easily lead to connection failure and cause poor stability of the battery pack. Utility Model Content

[0004] In view of this, the utility model provides a battery device to solve the problem of improving the stability of the battery pack while meeting the heat dissipation requirements of the battery pack.

[0005] The utility model provides a battery device, comprising:

[0006] At least one battery column, the battery column is formed by stacking a number of battery cells along the X direction;

[0007] A box body, the box body is provided with a bottom plate located relatively below the battery array;

[0008] A support plate, supported at the bottom of the battery array;

[0009] The support member is arranged between the bottom plate and the support plate so that the bottom plate and the support plate are spaced apart; the extension direction of the support member is arranged at an angle α to the stacking direction of at least one battery column, wherein 0°<α≤90°.

[0010] Beneficial effect: The battery device provided by the embodiment of the utility model supports the support member between the base plate and the support plate, which facilitates the formation of an air passage between the base plate and the support plate. By setting the extension direction of the support member at an angle α to the stacking direction of at least one battery column, each battery column can be supported by multiple support members at the same time. Even if one of the support members is damaged, the other support members can still play a supporting role to avoid the battery column from tilting, thereby ensuring that the battery column is effectively supported, avoiding connection failure, improving fault tolerance, and taking into account the heat dissipation performance of the battery pack while ensuring the stability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A schematic diagram of a battery device of the utility model;

[0013] Figure 2 This is a schematic diagram of the disassembled state of the battery device of the utility model;

[0014] Figure 3 It is a partial schematic diagram of the box body of the utility model;

[0015] Figure 4 A top view of the battery device of the utility model;

[0016] Figure 5 for Figure 4 Schematic diagram of the decomposed state of the AA section;

[0017] Figure 6 for Figure 4 Schematic diagram of the CC section;

[0018] Figure 7 for Figure 6 The enlarged view of point B in the middle;

[0019] Figure 8 This is a schematic diagram of the cooperation between the bottom plate and the support member of the utility model.

[0020] Description of reference numerals:

[0021] 1. Battery cell; 10. Battery row; 12. Battery row gap; 100. Battery pack;

[0022] 2. Box body; 21. Side panel; 211. Air inlet; 22. Bottom panel; 221. Assembly slot;

[0023] 3. Support plate; 31. Through hole;

[0024] 4. Support member; 41. Assembly rib; 42. Support top wall; 43. Support bottom wall;

[0025] 5. Wind passage. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] In the related art, an air cooling channel is often formed by suspending the bottom of the battery pack. The bottom of the battery pack needs to be suspended with a support. Since the battery pack is heavy, the arrangement of the support and the battery pack needs to be reasonably set. If the extension direction of the support is parallel to the stacking direction of each battery column in the battery pack, then when the support is damaged, it is easy to cause the battery column to tilt or even collapse and dislocate, which may easily lead to connection failure and cause poor stability of the battery pack.

[0031] The battery device provided by the embodiment of the utility model can effectively ensure the support of the support members to the battery columns while meeting the heat dissipation requirements of the battery columns by reasonably arranging the support members and the battery pack, so that each battery column is supported by multiple support members at the same time. Even if one of the support members is damaged, the other support members can still play a supporting role to avoid the battery column from tilting, thereby ensuring that the battery column is effectively supported, avoiding connection failure, improving fault tolerance, and ensuring the stability of the battery pack.

[0032] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0033] According to an embodiment of the utility model, a battery device is provided, comprising:

[0034] At least one battery column 10, wherein the battery column 10 is formed by stacking a plurality of battery cells 1 along the X direction;

[0035] The box body 2 is provided with a bottom plate 22 located relatively below the battery array 10;

[0036] A support plate 3, supported at the bottom of the battery array 10;

[0037] The support member 4 is disposed between the bottom plate 22 and the support plate 3 so that the bottom plate 22 and the support plate 3 are spaced apart. The extension direction of the support member 4 is set at an angle α to the stacking direction of at least one battery column 10, wherein 0°<α≤90°.

[0038] The plurality of battery columns 10 are sequentially arranged along the Y direction to form a battery pack 100 . The battery pack 100 is disposed in the housing 2 .

[0039] It should be noted that the X direction, Y direction, and Z direction referred to in this embodiment are all directions shown in the figure. Preferably, the X direction, Y direction, and Z direction are perpendicular to each other. Among them, the X direction can be the width direction of the battery pack 100 and the entire battery device, the Y direction can be the length direction of the battery pack 100 and the entire battery device, and the Z direction can be the height direction of the battery pack 100 and the entire battery device.

[0040] The support plate 3 is disposed relatively below the battery array 10 along the Z direction, so that the support plate 3 supports the battery array 10. The support member 4 is supported between the bottom plate 22 and the support plate 3, so that the bottom plate 22 and the support plate 3 are spaced apart, so as to form a wind passage 5 in the spaced area, so as to accelerate the heat dissipation of the battery pack 100 after ventilation.

[0041] It should be noted that the extension direction of the support member 4 is the extension direction of the length direction of the support member 4 .

[0042] By setting the extension direction of the support member 4 at an angle α to the stacking direction of at least one battery column 10, the support member 4 and the battery column 10 are staggered with each other, thereby ensuring that the support member 4 supports the battery column 10 while meeting the heat dissipation requirements of the battery pack.

[0043] In this embodiment, there may be a plurality of support members 4 . The plurality of support members 4 are arranged in parallel and at intervals; and at least two battery rows 10 are arranged along the extension direction of the support members 4 .

[0044] The battery device provided by the embodiment of the utility model supports the support member 4 between the bottom plate 22 and the support plate 3, so as to form an air passage 5 between the bottom plate 22 and the support plate 3. By setting the extension direction of the support member 4 at an angle α to the stacking direction of at least one battery column 10, each battery column can be supported by multiple support members 4 at the same time. Even if one of the support members 4 is damaged, the other support members 4 can still play a supporting role to avoid the battery column 10 from tilting, thereby ensuring that the battery column 10 is effectively supported, avoiding connection failure, improving fault tolerance, and taking into account the heat dissipation performance of the battery group while ensuring the stability of the battery group 100.

[0045] Furthermore, the number of battery columns 10 may be multiple columns, and each support member 4 may support multiple columns of battery columns 10 at the same time, thereby improving the utilization rate of the support member 4 .

[0046] In some embodiments, in combination Figure 2 As shown, the extension direction of the support member 4 is perpendicular to the stacking direction of the battery array 10 , wherein the stacking direction of the battery array 10 is parallel to the X direction, and the extension direction of the support member 4 is parallel to the Y direction.

[0047] By further making the extension direction of the support member 4 perpendicular to the stacking direction of the battery array 10, each battery array can be supported by multiple support members 4 at the same time, thereby ensuring the supporting effect of the battery array 10. Even if one of the support members 4 is damaged, the other support members 4 can still play a supporting role, thereby avoiding the tilting of the battery array 10 due to damage of a single support member 4, thereby improving the fault tolerance rate.

[0048] At the same time, by making the extension direction of the support member 4 perpendicular to the stacking direction of the battery array 10, that is, the extension direction of the support member 4 is parallel to the Y direction, multiple support members 4 can adopt the same length specification, which is convenient for batch processing.

[0049] In some embodiments, in combination Figure 2 As shown, at least one battery row 10 is stacked along the width direction of the bottom plate 22 , and the extension direction of the support member 4 is parallel to the length direction of the bottom plate 22 .

[0050] Stacking the battery columns 10 along the width direction of the bottom plate 22 can reduce the weight of a single battery column and improve the support stability of the support member 4. The extension direction of the support member 4 is parallel to the length direction of the bottom plate 22, so that each support member 4 can support all the battery columns at the same time, thereby improving the utilization rate of the support member 4.

[0051] In some embodiments, in combination Figure 2 As shown, the dimension of the support member 4 in its extension direction is A (not shown in the figure), and the dimension of the bottom plate 22 in its length direction is B, satisfying: 0.9≤A / B≤1.0.

[0052] By defining the upper limit of A / B, it is possible to ensure the supporting performance while avoiding the situation where the size of the support member 4 is too large, which is prone to stress concentration and thus fracture. By defining the lower limit of A / B, it is possible to avoid the situation where the size of the support member 4 in its extension direction is too small, which leads to insufficient supporting strength, and avoid the situation where the support member 4 is not uniformly stressed due to insufficient overlapping length with the battery array 10, so that all battery arrays 10 can be effectively supported.

[0053] In some embodiments, in combination Figure 5 As shown, the width dimension of one end of the support member 4 close to the support plate 3 along the X direction is C, and the dimension of the battery column 10 along the X direction is D, which satisfies: 0.1≤C / D≤0.2.

[0054] The dimension of the battery column 10 along the X direction is the maximum distance between the battery cells 1 at both ends of the battery column 10 along the X direction.

[0055] By limiting the upper limit of C / D, it is possible to avoid the situation where the width of the support member 4 is too large, which causes the air passage 5 to occupy too much space, and prevents excessive wind resistance. At the same time, by limiting the lower limit of C / D, it is possible to avoid the width of the end of the support member 4 close to the support plate 3 being too small, which causes the support strength of the support member 4 to be insufficient, and to avoid excessive local pressure in the contact area between the support member 4 and the support plate 3, so as to ensure the stability of the force on the support plate 3. Similarly, the width of the end of the support member 4 close to the bottom plate 22 is also not easy to be too small, so as to avoid excessive local pressure in the contact area between the support member 4 and the bottom plate 22, and ensure the stability of the force on the bottom plate 22.

[0056] In some embodiments, in combination Figure 6 As shown, in a direction perpendicular to the plane where the support plate 3 is located, the orthographic projection of the support member 4 at least partially overlaps with the orthographic projection of at least one battery column 10 .

[0057] By making the orthographic projection of the support member 4 at least partially overlap with the orthographic projection of at least one battery column 10 in a direction perpendicular to the plane of the support plate 3, it is possible to ensure that the support member 4 at least partially supports the battery column 10, thereby preventing the battery column 10 from being supported only by the support plate 3, improving the supporting effect on the battery column 10, and preventing the battery column 10 from sinking.

[0058] Preferably, in this embodiment, in a direction perpendicular to the plane where the support plate 3 is located, the length of the orthographic projection of the support member 4 along the Y direction exceeds the length of the orthographic projection of the battery column 10 along the Y direction, thereby ensuring that the support member 4 can support the entire area of ​​the battery column 10 along the Y direction.

[0059] In some embodiments, in combination Figure 2 , Figure 6 , Figure 7 As shown, a through hole 31 is formed through the support plate 3 in a direction perpendicular to the plate surface, and the through hole 31 is perpendicular to the extension direction of the support member 4 in an extension direction parallel to the plane where the support plate 3 is located.

[0060] Since the support plate 3 is disposed in the box body 2 , the support plate 3 divides the box body 2 into a battery accommodating area for accommodating the battery pack 100 and an area forming the air passage 5 along the Z direction.

[0061] By forming a through hole 31 through the support plate 3 in a direction perpendicular to the plate surface, the air passage 5 can be connected to the battery accommodation area, so that the wind in the air passage 5 can be blown to the battery accommodation area, thereby facilitating heat dissipation of the battery pack 100.

[0062] Moreover, the extension direction of the through hole 31 parallel to the plane where the support plate 3 is located is perpendicular to the extension direction of the support member 4, thereby minimizing the overlapping area between the through hole 31 and the support member 4, which can not only ensure the strength of the through hole 31, but also avoid the support member 4 from excessively occupying the area of ​​the through hole 31, thereby facilitating heat dissipation.

[0063] In this embodiment, the through hole 31 is configured as a long hole extending along the X direction.

[0064] In some embodiments, in combination Figure 2 As shown, the dimension of the bottom plate 22 in the length direction thereof is B, and the dimension of the through hole 31 along the length direction of the bottom plate 22 is E, which satisfies: 0.05≤E / B≤0.1.

[0065] By limiting the upper limit of E / B, it is possible to avoid the opening area of ​​the through hole 31 on the support plate 3 being too large, which would result in insufficient structural strength of the support plate 3, and ensure that the support plate 3 can provide reliable support for the battery pack 100; by limiting the lower limit of E / B, it is possible to avoid the opening area of ​​the through hole 31 on the support plate 3 being too small, which would result in a small amount of air flow, and ensure the heat exchange efficiency of the battery. This ensures a balance between reliable support of the support plate 3 and heat exchange efficiency of the battery pack 100.

[0066] It should be noted that since the support plate 3 is arranged parallel to the base plate 22, in this embodiment, it is preferred that the length of the support plate 3 along the Y direction is equal to the length of the base plate 22 along the Y direction, and the width of the support plate 3 along the X direction is equal to the width of the base plate 22 along the Y direction. At this time, the ratio of the dimension E of the through hole 31 along the length direction of the base plate 22 to the dimension B of the base plate 22 in its length direction can also be regarded as the ratio of the dimension E of the through hole 31 along the length direction of the base plate 22 to the dimension of the support plate 3 in its length direction.

[0067] In some embodiments, in combination Figure 2 As shown, there are multiple through holes 31, and the multiple through holes 31 are arranged in parallel and at intervals along the length direction of the bottom plate 22;

[0068] Along the length direction of the bottom plate 22 , the interval between two adjacent through holes 31 is F; the dimension of the bottom plate 22 in its length direction is B, which satisfies: 0.1≤F / B≤0.5.

[0069] By defining the lower limit of F / B, it is possible to avoid the through holes 31 being too densely opened on the support plate 3, which would result in insufficient structural strength of the support plate 3, and ensure that the support plate 3 can provide reliable support for the battery pack 100; by defining the upper limit of F / B, it is possible to avoid the through holes 31 being too few in number on the support plate 3, which would result in a small amount of air flow, and ensure the heat exchange efficiency of the battery. This ensures a balance between reliable support of the support plate 3 and heat exchange efficiency of the battery pack 100.

[0070] It should be noted that since the support plate 3 is arranged parallel to the base plate 22, in this embodiment, it is preferred that the length of the support plate 3 along the Y direction is equal to the length of the base plate 22 along the Y direction, and the width of the support plate 3 along the X direction is equal to the width of the base plate 22 along the Y direction. At this time, the ratio of the spacing F between two adjacent through holes 31 to the dimension B of the base plate 22 in its length direction can also be regarded as the ratio of the spacing F between two adjacent through holes 31 to the dimension of the support plate 3 in its length direction.

[0071] In some embodiments, in combination Figure 8 As shown, the bottom plate 22 is provided with a mounting groove 221 , and the support member 4 at least partially extends into the mounting groove 221 .

[0072] By at least partially extending the support member 4 into the assembly groove 221 , the support member 4 can be positioned by means of the assembly groove 221 , and the fixation of the support member 4 is facilitated.

[0073] In some embodiments, the assembly groove 221 is set through the bottom plate 22, and the support member 4 is formed with an assembly rib 41 corresponding to the assembly groove 221. The assembly rib 41 is penetrated in the assembly groove 221, and the joint between the assembly rib 41 and the assembly groove 221 is welded and fixed.

[0074] By welding and fixing the joints between the assembling ribs 41 and the assembling grooves 221 , it is possible to ensure that the support member 4 and the bottom plate 22 are securely fixed, thereby preventing the support member 4 from being misplaced or damaged.

[0075] In addition, the welding position between the assembly rib 41 and the assembly groove 221 can be located on the bottom surface of the bottom plate 22, so as to facilitate processing.

[0076] In some embodiments, in combination Figure 7 As shown, the spaced area between the bottom plate 22 and the support plate 3 forms an air passage 5 .

[0077] In some embodiments, in combination Figure 6 , Figure 7 As shown, the number of battery columns 10 is at least two, and two adjacent battery columns 10 are spaced apart to form a battery column gap 12;

[0078] The projection of the battery column gap 12 toward the support plate 3 at least partially overlaps with the through hole 31 .

[0079] By making the projection of the battery column gap 12 toward the support plate 3 at least partially overlap with the through hole 31, the wind blown out of the air passage 5 toward the through hole 31 can be directly blown between two adjacent battery columns 10, so that the airflow contacts multiple battery columns 10 at the same time, providing space for air circulation and improving heat dissipation efficiency.

[0080] In some embodiments, in combination Figure 2 , Figure 3 , Figure 6 As shown, the box body 2 further includes a side plate 21 arranged at the circumferential edge of the bottom plate 22 , and an air inlet hole 211 is penetrated through the side plate 21 , and the air inlet hole 211 is communicated with the air passage 5 .

[0081] By penetrating the side plate 21 with an air inlet hole 211 , and the air inlet hole 211 being in communication with the air passage 5 , air can enter the box body 2 easily, thereby facilitating air circulation and improving heat exchange efficiency.

[0082] In some embodiments, in combination Figure 2 , Figure 3 , Figure 6As shown, the air inlet 211 is provided on the side plate 21 intersecting with the extension direction of the support member 4;

[0083] Furthermore, the projection of the air inlet hole 211 perpendicular to the plane where the side plate 21 is located is located within the range of the projection of the air passage 5 along the extension direction parallel to the support member 4 .

[0084] It should be noted that when the extension direction of the support member 4 is perpendicular to the stacking direction of the battery column 10, that is, the extension direction of the support member 4 is parallel to the Y direction, the side panel 21 intersecting with the extension direction of the support member 4 referred to here refers to the side panels on both sides of the box body 2 along the Y direction.

[0085] Since the extension direction of the support member 4 is parallel to the Y direction, by setting the air inlet holes 211 on the side panels of the box body 2 on both sides along the Y direction, air circulation can be easily achieved along the extension direction of the support member 4, avoiding obstruction of the air intake by the support member 4.

[0086] The projection of the air inlet 211 perpendicular to the plane where the side panel 21 is located is within the range of the projection of the wind passage 5 along the extension direction parallel to the support member 4, thereby ensuring that the wind entering through the air inlet 211 can smoothly pass into the wind passage 5, ensuring smooth air intake.

[0087] In some embodiments, a side of the support member 4 close to the support plate 3 forms a support top wall 42, and a side of the support member 4 close to the bottom plate 22 forms a support bottom wall 43;

[0088] Along the X direction, the size of the support top wall 42 is greater than the size of the support bottom wall 43 .

[0089] By making the size of the support top wall 42 of the support member 4 along the X direction larger than the size of the support bottom wall 43 , the contact area between the support top wall 42 and the support plate 3 can be ensured, thereby ensuring effective support for the battery pack 100 .

[0090] In this embodiment, the cross section of the support member 4 in the XZ plane can be constructed as an inverted trapezoid, so as to ensure the contact area between the support top wall 42 and the support plate 3 and ensure effective support for the battery pack 100 .

[0091] The battery device provided in the embodiment of the utility model can be applied to various electrical equipment, for example, it can be applied to electrical equipment such as passenger cars, commercial vehicles, airplanes, ships, engineering machinery, energy storage equipment, etc.

[0092] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A battery device, characterized in that: include: At least one battery row (10), wherein the battery row (10) is formed by stacking a plurality of battery cells (1) along the X direction; A box body (2), the box body (2) being provided with a bottom plate (22) located relatively below the battery array (10); A support plate (3) supported at the bottom of the battery array (10); A support member (4) is arranged between the bottom plate (22) and the support plate (3) so that the bottom plate (22) and the support plate (3) are spaced apart; an extension direction of the support member (4) is arranged at an angle α to a stacking direction of at least one column of the battery columns (10), wherein 0°<α≤90°.

2. The battery device according to claim 1, characterized in that: The extension direction of the support member (4) is perpendicular to the stacking direction of the battery row (10), wherein the stacking direction of the battery row (10) is parallel to the X direction, and the extension direction of the support member (4) is parallel to the Y direction.

3. The battery device according to claim 2, characterized in that: At least one row of the battery rows (10) is stacked along the width direction of the bottom plate (22), and the extension direction of the support member (4) is parallel to the length direction of the bottom plate (22).

4. The battery device according to claim 3, characterized in that: The dimension of the support member (4) in its extension direction is A, and the dimension of the bottom plate (22) in its length direction is B, satisfying the following: 0.9≤A / B≤1.

0.

5. The battery device according to claim 2, characterized in that: The width dimension of one end of the support member (4) close to the support plate (3) along the X direction is C, and the dimension of the battery column (10) along the X direction is D, satisfying: 0.1≤C / D≤0.

2.

6. The battery device according to claim 1, characterized in that: In a direction perpendicular to the plane where the support plate (3) is located, the orthographic projection of the support member (4) at least partially overlaps with the orthographic projection of at least one column of the battery columns (10).

7. The battery device according to any one of claims 1 to 6, characterized in that: The support plate (3) is penetrated by a through hole (31) in a direction perpendicular to the plate surface, and the through hole (31) is perpendicular to the extension direction of the support member (4) in an extension direction parallel to the plane where the support plate (3) is located.

8. The battery device according to claim 7, characterized in that: The dimension of the bottom plate (22) in the length direction thereof is B, and the dimension of the through hole (31) along the length direction of the bottom plate (22) is E, satisfying: 0.05≤E / B≤0.

1.

9. The battery device according to claim 7, characterized in that: The number of the through holes (31) is multiple, and the multiple through holes (31) are arranged in parallel and at intervals along the length direction of the bottom plate (22); Along the length direction of the bottom plate (22), the spacing between two adjacent through holes (31) is F; the dimension of the bottom plate (22) in its length direction is B, satisfying: 0.1≤F / B≤0.

5.

10. The battery device according to any one of claims 1 to 6, characterized in that: The bottom plate (22) is provided with an assembly groove (221), and the support member (4) at least partially extends into the assembly groove (221).

11. The battery device according to claim 10, characterized in that: The assembly groove (221) is arranged through the bottom plate (22); the support member (4) is formed with an assembly rib (41) corresponding to the assembly groove (221); the assembly rib (41) is passed through the assembly groove (221); and the connection between the assembly rib (41) and the assembly groove (221) is welded and fixed.

12. The battery device according to claim 7, characterized in that: The number of the battery columns (10) is at least two, and two adjacent battery columns (10) are arranged at an interval to form a battery column gap (12); The projection of the battery column gap (12) toward the support plate (3) at least partially overlaps with the through hole (31).

13. The battery device according to any one of claims 1 to 6, characterized in that: The interval area between the bottom plate (22) and the support plate (3) forms an air passage (5).

14. The battery device according to claim 13, characterized in that: The box body (2) further comprises a side plate (21) arranged on the circumferential edge of the bottom plate (22), the side plate (21) being provided with an air inlet hole (211) penetrating therethrough, the air inlet hole (211) being in communication with the air passage (5).

15. The battery device according to claim 14, characterized in that: The air inlet hole (211) is arranged on the side plate (21) intersecting with the extension direction of the support member (4); Furthermore, the projection of the air inlet (211) is perpendicular to the plane where the side plate (21) is located, and is located within the range of the projection of the air passage (5) along the extension direction parallel to the support member (4).

16. The battery device according to any one of claims 1 to 6, characterized in that: The number of the supporting members (4) is plural, and the supporting members (4) are arranged in parallel and at intervals; At least two rows of battery rows (10) are arranged along the extension direction of the support member (4).

17. The battery device according to any one of claims 1 to 6, characterized in that: A side of the support member (4) close to the support plate (3) forms a support top wall (42), and a side of the support member (4) close to the bottom plate (22) forms a support bottom wall (43); Along the X direction, the size of the supporting top wall (42) is greater than the size of the supporting bottom wall (43).

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