Battery support tray and battery package

Abstract

To provide a secondary battery excellent in reliability.SOLUTION: A battery support tray according to an embodiment of the present disclosure includes a base including a bottom surface having one or more battery mounting areas, a plurality of walls erected in a first direction in a peripheral area of the bottom surface other than the one or more battery mounting areas and including a side surface, and one or more protrusions provided on the side surface of each of the plurality of walls and protruding along a first plane orthogonal to the first direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a battery support tray and a battery package. [Background technology]

[0002] Due to the widespread use of various electronic devices such as mobile phones, secondary batteries have been developed as a power source that is small, lightweight, and capable of achieving high energy density. Furthermore, a battery support tray that can hold and support multiple secondary batteries has been developed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] China Utility Model Registration No. 208233805 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned battery support trays have room for improvement in terms of vibration resistance and shock resistance.

[0005] Therefore, a battery support tray with excellent reliability is desired. [Means for solving the problem]

[0006] A battery support tray according to one embodiment of the present disclosure includes a base including a bottom surface having one or more battery installation areas, a plurality of wall portions including side surfaces extending in a first direction in peripheral areas of the bottom surface other than the one or more battery installation areas, and one or more protrusions provided on the side surfaces of each of the plurality of wall portions and protruding along a first plane perpendicular to the first direction. Note that the battery installation area is an area in which one battery can be installed, and is an area that coincides with an area defined by a circle abutting the one or more protrusions when the battery support tray is viewed from above, or an area that is included in the area defined by the circle abutting the one or more protrusions.

[0007] A battery package according to one embodiment of the present disclosure includes the battery support tray according to the above embodiment, a plurality of batteries supported by the battery support tray, and a container that houses the battery support tray and the plurality of batteries. [Effects of the Invention]

[0008] In the battery support tray and battery package according to an embodiment of the present disclosure, one or more protrusions are provided on each side of a plurality of wall sections erected in the peripheral area other than the battery installation area, and the protrusions extend along the first plane. This provides excellent vibration resistance and impact resistance despite a simple configuration. As a result, the battery support tray and battery package according to an embodiment of the present disclosure have excellent reliability.

[0009] Note that the effects of the present disclosure are not necessarily limited to the effects described here, but may be any of a series of effects related to the present disclosure described below. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is an exploded perspective view illustrating an example of a configuration of a battery package according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view showing an example of the external configuration of a battery support tray that can be applied to the battery package shown in FIG. [Figure 3] FIG. 3 is a partially enlarged perspective view showing a portion of the battery support tray shown in FIG. [Figure 4] FIG. 4 is a plan view illustrating an example of the planar configuration of the battery support tray shown in FIG. [Figure 5] FIG. 5 is a partially enlarged plan view showing a portion of the battery support tray shown in FIG. [Figure 6] FIG. 6 is a partially enlarged cross-sectional view showing a portion of the battery support tray shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. The description will be made in the following order. 1. Battery package with battery support tray 1-1.Configuration 1-2. Action and effects 2. Variations

[0012] <1. Battery packaging> [1-1. Overall composition] First, a battery package according to an embodiment of the present disclosure will be described. Fig. 1 is an exploded perspective view showing an example of a configuration of a battery package according to an embodiment of the present disclosure (hereinafter referred to as battery package 1).

[0013] As shown in FIG. 1, a battery package 1 includes a plurality of batteries 2, a pair of trays 3 (upper tray 3U and lower tray 3L), a sub-carton 4, and a master carton 5.

[0014] The plurality of batteries 2 are, for example, cylindrical lithium ion secondary batteries having a cylindrical external appearance. However, the battery of the present disclosure is not limited to a cylindrical lithium ion secondary battery, and may be a lithium ion secondary battery having an external appearance of a shape other than a cylindrical shape, or a secondary battery using an electrode reactant other than lithium. Furthermore, the battery 2 is not limited to a secondary battery, and may be a primary battery.

[0015] The upper tray 3U and the lower tray 3L support a plurality of batteries 2, for example, while facing each other with the plurality of batteries 2 sandwiched in the Z-axis direction. The stack of the upper tray 3U, the plurality of batteries 2, and the lower tray 3L is housed in a sub-carton 4, which is a box-shaped container. The sub-carton 4 is housed in a master carton 5, which is a box-shaped container that is larger than the size of the sub-carton 4.

[0016] [1-2. Tray configuration] Next, the configuration of a battery support tray 10 that can be used as the upper tray 3U or the lower tray 3L will be described. FIG. 2 is a perspective view showing an example of the external configuration of the battery support tray 10. FIG. 3 is a partially enlarged perspective view showing a portion of the battery support tray 10. Note that FIG. 3 also shows the batteries 2 placed on the battery support tray 10. FIG. 4 is a plan view showing an example of the planar configuration of the battery support tray 10. FIG. 5 is a partially enlarged plan view showing a portion of the battery support tray 10. FIG. 6 is a partially enlarged cross-section of a portion of the battery support tray 10, taken along line VI-VI in FIG. 5.

[0017] g As shown in FIG. 2, the battery support tray 10 includes a base 11, multiple support columns 12, an outer wall 13, and a flange 14. The base 11, the multiple support columns 12, the outer wall 13, and the flange 14 may all be made of the same material, such as resin, and may be integrally molded. The base 11 includes a bottom surface 11BS extending along the XY plane and having one or more battery installation areas AR1. In the example shown in FIGS. 2 to 6, the base 11 is provided with multiple battery installation areas AR1. Each of the multiple support columns 12 is provided in a peripheral area AR2 of the bottom surface 11BS other than the one or more battery installation areas AR1. As shown in FIGS. 2 and 5, the bottom surface 11BS may have an uneven structure including, for example, multiple recesses BS1, multiple recesses BS2, and one protrusion BS3 separating the recesses BS1 and BS2. The recesses BS1 are provided in the battery installation area AR1, and the recesses BS2 are provided in at least a portion of the peripheral area AR2. The uneven structure of the bottom surface 11BS includes one continuous protrusion BS3. Each of the multiple support columns 12 is provided in a recess BS2 of the bottom surface 11BS. Therefore, each of the multiple support columns 12 is provided spaced apart from one another. Each of the multiple support columns 12 stands in the Z-axis direction, which is perpendicular to the bottom surface 11BS. Each of the multiple support columns 12 includes a side surface 21SS. The multiple support columns 12 are a specific example corresponding to the "multiple wall portions" as an embodiment of the present disclosure. As shown in FIG. 4, the multiple support columns 12 are discretely arranged along each of the X-axis direction and the Y-axis direction, and are arranged in a matrix pattern as a whole. The occupied area of ​​each of the multiple support columns 12 is preferably smaller than the occupied area of ​​each of the multiple battery installation areas AR1. The battery installation area AR1 is an area in which one battery 2 can be installed, and is an area that coincides with the area defined by a circle that abuts one or more protrusions 22 (described later) when the battery support tray 10 is viewed from above, or an area that is included in the area defined by a circle that abuts one or more protrusions 22.

[0018] Each of the multiple support columns 12 has a body portion 21 including a side surface 21SS and one or more protrusions 22. Each of the one or more protrusions 22 is provided on the side surface 21SS of the body portion 21. In the example shown in FIGS. 2 to 6, multiple protrusions 22 are provided for each body portion 21. The multiple protrusions 22 each protrude from the side surface 21SS of the body portion 21 along the XY plane. The angle formed by the side surface 21SS with respect to the bottom surface 11BS can be substantially 0°. Each of the multiple support columns 12 is preferably elastic. This allows the protrusions 22 to bend in the direction indicated by the arrow in FIG. 6 while being in close contact with the side surface of the battery 2 when the battery 2 is placed in the battery installation area AR1 as shown in FIG. 6. As a result, one battery 2 can be firmly held by the multiple support columns 12. Furthermore, each of the multiple protrusions 22 is preferably made of the same constituent material as the corresponding body portion 21 and is preferably molded integrally with the body portion 21. 6, each of the plurality of supports 12 preferably has a cavity V12 therein. The cavity V12 preferably connects the body 21 with the plurality of protrusions 22. Furthermore, the height H21 in the Z-axis direction of each of the plurality of supports 12 preferably is greater than the height H22 in the Z-axis direction of each of the plurality of protrusions 22 provided on each of the plurality of supports 12. This is because it makes it easier to insert the battery 2 into the battery installation area AR1 in the gaps between the plurality of supports 12.

[0019] The plurality of protrusions 22 provided on one of the plurality of columns 12 are provided at different positions on the side surface 21SS of the body portion 21 of the column 12 in a plan view in the Z-axis direction. The plurality of protrusions 22 may be isotropically arranged around the body portion 21 in a plan view in the Z-axis direction. The plurality of protrusions 22 provided on one of the plurality of columns 12 are provided at different positions along the outer edge of a corresponding one of the battery installation areas AR1. For example, as shown in FIG. 5, for example, four protrusions 22A to 22D are provided on the side surface 21SS of the body portion 21 of each of the plurality of columns 12. In the example shown in FIG. 5, each of the plurality of columns 12 is disposed in a gap between the four battery installation areas AR1, and two of the four protrusions 22A to 22D are aligned along the outer edge of the same one of the battery installation areas AR1. Therefore, one battery 2 placed in one battery installation area AR1 is surrounded by a total of four support posts 12 and is gripped by a total of eight protrusions 22. In other words, the side surfaces of one battery 2 come into contact with a total of eight protrusions 22.

[0020] The outer wall portion 13 is erected on the bottom surface 11BS along the outer edge of the bottom surface 11BS so as to surround the plurality of battery installation areas AR1. The outer wall portion 13 is a specific example corresponding to one of the "wall portions" of the "plurality of wall portions" according to one embodiment of the present disclosure. The battery support tray 10 may further include outer wall protrusions 31, 32 provided on the outer wall portion 13 and protruding toward the battery installation area AR1. There are multiple outer wall protrusions 31 and multiple outer wall protrusions 32, each located at different positions along the outer edge of the corresponding battery installation area AR1. The outer wall protrusions 31 and 32 are configured to closely contact the side of the battery 2 when the battery 2 is placed in the battery installation area AR1. Note that the Z-axis heights H31, H32 of the outer wall protrusions are preferably both smaller than the Z-axis height H13 of the outer wall portion 13, for example. This is because it makes it easier to insert the battery 2 into the battery installation area AR1 adjacent to the outer wall portion 13.

[0021] The upper surfaces of the outer wall projections 32 are flat, so that when multiple battery support trays 10 are stacked, the upper surface 32T of the outer wall projection 32 of one battery support tray 10 abuts against the back surface of the base 11 of another battery support tray 10. In other words, only the upper surface 32T of the outer wall projection 32 abuts against the back surface of the base 11 of another battery support tray 10. Therefore, when multiple battery support trays 10 are stacked, spaces are maintained between the multiple battery support trays 10, preventing the multiple battery support trays 10 from coming into close contact with each other. As a result, it is easy to remove the battery support trays 10 one by one from the stacked multiple battery support trays 10.

[0022] The flange 14 is connected to the upper surface of the outer wall 13 so as to surround the battery installation area AR1 and extends along the XY plane toward the outside of the outer wall 13. Providing the flange 14 on the outer wall 13 increases the rigidity of the battery support tray 10, improving its mechanical strength. The flange 14 may be provided with multiple protrusions 14T that protrude outward, i.e., along the XY plane, away from the battery installation area AR1. The multiple protrusions 14T are inserted into and engaged with slits 4S (see FIG. 1 ) formed in the side wall of the sub-carton 4 when the battery support tray 10 is housed in the sub-carton 4. When the battery support tray 10 is used as the lower tray 3L in the battery package 1 shown in FIG. 1 , the multiple protrusions 14T engage with the slits 4S, making it easier to remove the batteries 2 from the lower tray 3L when removing the batteries 2 from the sub-carton 4.

[0023] [1-2. Actions and Effects] As described above, in the battery package 1 of this embodiment, the battery support tray 10 includes a base 11, multiple support columns 12, and one or more protrusions 22. The base 11 includes a bottom surface 11BS having one or more battery installation areas AR1. Each of the multiple support columns 12 extends in the Z-axis direction in a peripheral area AR2 of the bottom surface 11BS other than the one or more battery installation areas AR1, and includes a side surface 21SS. The one or more protrusions 22 are provided on the side surface 21SS of each support column 12 so as to protrude along the XY plane. This allows a biasing force to be applied from two directions in the XY plane to the side surface of the battery 2 placed in the battery installation area AR1. Therefore, the battery support tray 10 and battery package 1 of this embodiment have a simple configuration yet provide excellent vibration resistance and impact resistance. Therefore, the battery support tray 10 and battery package 1 of this embodiment have excellent reliability.

[0024] Furthermore, when the angle formed by the side surface 21SS with respect to the bottom surface 11BS is substantially 0°, the contact area between one or more protrusions 22 and the side surface of the battery 2 placed in the battery installation area AR1 can be increased compared to when this is not the case, i.e., when the angle formed by the side surface 21SS with respect to the bottom surface 11BS is substantially greater than 0°. This increases the gripping force of the battery support tray 10 on the battery 2, thereby further improving vibration resistance and impact resistance.

[0025] Furthermore, in the battery support tray 10 of this embodiment, the multiple protrusions 22 provided on one of the multiple support columns 12 are provided at different positions on the side surface 21SS of the body portion 21 of the support column 12 in a plane along the XY plane. Furthermore, in the battery support tray 10 of this embodiment, the multiple protrusions 22 provided on the body portion 21 of one support column 12 are provided at different positions along the outer edge of the corresponding one battery installation area AR1. This allows the battery 2 to be supported from two directions, thereby increasing the gripping force for gripping the battery 2. Furthermore, the accuracy of the battery 2 placement position is improved.

[0026] Furthermore, in the battery support tray 10 of this embodiment, the height H21 in the Z-axis direction of each of the multiple support columns 12 is set to be greater than the height H22 in the Z-axis direction of each of the multiple protrusions 22 provided on each of the multiple support columns 12. This makes it easier to insert the batteries 2 into the battery installation areas AR1 in the gaps between the multiple support columns 12.

[0027] Furthermore, in the battery support tray 10 of this embodiment, the area occupied by each of the multiple support columns 12 is set smaller than the area occupied by each of the multiple battery installation areas AR1. Therefore, the battery support tray 10 of this embodiment can store multiple batteries 2 at a high density.

[0028] Furthermore, in the battery support tray 10 of this embodiment, if each of the plurality of support posts 12 is made elastic, the battery 2 can be firmly held.

[0029] Furthermore, in the battery support tray 10 of this embodiment, if each of the multiple protrusions 22 is made of the same constituent material as the corresponding body portion 21 and molded integrally with the body portion 21, high ease of manufacturing can be ensured.

[0030] Each of the plurality of support columns 12 and one or more protrusions corresponding to each of the plurality of support columns 12 have a cavity V12 communicating with each other, thereby achieving a reduction in weight.

[0031] Furthermore, in the battery support tray 10 of this embodiment, the flange portion 14 is provided on the outer wall portion 13, which increases the rigidity of the battery support tray 10 and improves the mechanical strength of the battery support tray 10.

[0032] While the present disclosure has been described above with reference to one embodiment, the configuration of the present disclosure is not limited to the configuration described in the above embodiment and can be modified in various ways. For example, while the above embodiment illustrates a battery having a cylindrical appearance with a circular horizontal cross section, the present disclosure is not limited thereto. The electrode wound body of the present disclosure may have an elliptical cylindrical appearance with an elliptical horizontal cross section, for example.

[0033] In addition, in the above embodiment, a total of 100 battery installation areas AR1 are illustrated, with 10 arranged in both the X-axis direction and the Y-axis direction, but the number of one or more battery installation areas in the present disclosure is not limited to this. Furthermore, the arrangement positions of the battery installation areas along the first plane and the shapes of the support posts, etc., are not limited to those shown in Figures 1 to 6 in the present disclosure, and can be selected arbitrarily.

[0034] The effects described in this specification are merely examples, and the effects of the present disclosure are not limited to the effects described in this specification. Therefore, other effects may be obtained with respect to the present disclosure.

[0035] The present disclosure may take the following forms. <1> a base including a bottom surface having one or more battery mounting areas; a plurality of wall portions including side surfaces, the wall portions being erected in a first direction in a peripheral area of ​​the bottom surface other than the one or more battery installation areas; one or more protrusions provided on the side surfaces of the plurality of wall portions and protruding along a first plane perpendicular to the first direction; A battery support tray comprising: <2> The angle formed by the side surface with respect to the bottom surface is substantially 0° the above <1> 1. The battery support tray as described. <3> the one or more protrusions provided on each of the plurality of wall portions include a plurality of protrusions, The plurality of protrusions provided on one wall portion of the plurality of wall portions are provided at different positions on the side surface of the one wall portion in a plane along the first plane. the above <1> or <2> 1. The battery support tray as described. <4> the one or more protrusions provided on each of the plurality of wall portions include a plurality of protrusions, The plurality of protrusions provided on one wall portion of the plurality of wall portions are provided at mutually different positions along the outer edge of the corresponding one of the battery installation areas. the above <1> from <3> 10. A battery support tray according to any one of claims 1 to 9. <5> The height of each of the plurality of wall portions in the first direction is greater than the height of each of the one or more protrusions provided on each of the plurality of wall portions in the first direction. the above <1> from <4> 10. A battery support tray according to any one of claims 1 to 9. <6> The plurality of wall portions are a plurality of support columns provided on the bottom portion at intervals from each other. the above <1> from <5> 10. A battery support tray according to any one of claims 1 to 9. <7> The area occupied by each of the plurality of support columns is smaller than the area occupied by each of the one or more battery installation areas. the above <6> The battery support tray according to claim 1. <8> Each of the plurality of wall portions exhibits elasticity. the above <1> from <7> 10. A battery support tray according to any one of claims 1 to 9. <9> Each of the plurality of protrusions is integrally formed with a corresponding one of the plurality of wall portions. are the above <6> 1. The battery support tray as described. <10> Each of the plurality of wall portions and the one or more protrusions corresponding to each of the plurality of wall portions have a cavity that communicates with each other. the above <1> from <9> 10. A battery support tray according to any one of claims 1 to 9. <11> Further provided is an outer wall portion erected on the bottom portion, the one or more battery mounting areas include a plurality of battery mounting areas; The outer wall portion surrounds the plurality of battery installation areas. the above <1> from <10> 10. A battery support tray according to any one of claims 1 to 9. <12> The outer wall portion may further include one or more outer wall protrusions each protruding toward the battery installation area. the above <11> 1. The battery support tray as described. <13> The height of the outer wall protrusion in the first direction is smaller than the height of the outer wall portion in the first direction. the above <12> 1. The battery support tray as described. <14> a flange portion provided on the outer wall portion and extending along the first plane; the above <11> from <13> 10. A battery support tray according to any one of claims 1 to 9. <15> The bottom surface has an uneven structure including recesses provided in the one or more battery installation areas and protrusions protruding beyond the recesses. the above <1> from <14> 10. A battery support tray according to any one of claims 1 to 9. <16> the above <1> from <13> a battery support tray according to any one of the preceding items; a plurality of batteries supported on the battery support tray; a container for accommodating the battery support tray and the plurality of batteries; A battery package comprising: [Explanation of symbols]

[0036] 1...battery package, 2...battery, 3...tray, 3U...upper tray, 3L...lower tray, 4...sub-carton, 5...master carton, 10...battery support tray, 11...base, 11BS...bottom, 12...support, 13...outer wall, 14...flange, 21...body, 21SS...side, 22...protrusion, AR1...battery installation area, AR2...surrounding area.

Claims

1. a base including a bottom surface having one or more battery mounting areas; a plurality of wall portions including side surfaces, the wall portions being erected in a first direction in a peripheral region of the bottom surface other than the one or more battery installation regions; one or more protrusions provided on the side surfaces of the plurality of wall portions and protruding along a first plane perpendicular to the first direction; A battery support tray comprising:

2. The angle formed by the side surface with respect to the bottom surface is substantially 0° The battery support tray of claim 1 .

3. the one or more protrusions provided on each of the plurality of wall portions include a plurality of protrusions, The plurality of protrusions provided on one wall portion of the plurality of wall portions are provided at different positions on the side surface of the one wall portion in a plane along the first plane. The battery support tray of claim 1 .

4. the one or more protrusions provided on each of the plurality of wall portions include a plurality of protrusions, The plurality of protrusions provided on one wall portion of the plurality of wall portions are provided at mutually different positions along an outer edge of the corresponding one of the battery installation areas. The battery support tray of claim 1 .

5. The height of each of the plurality of wall portions in the first direction is greater than the height of each of the one or more protrusions provided on each of the plurality of wall portions in the first direction. The battery support tray of claim 1 .

6. The plurality of wall portions are a plurality of support columns provided on the bottom portion at intervals from each other. The battery support tray of claim 1 .

7. The area occupied by each of the plurality of support columns is smaller than the area occupied by each of the one or more battery installation areas.

7. The battery support tray of claim 6.

8. Each of the plurality of wall portions exhibits elasticity. The battery support tray of claim 1 .

9. Each of the plurality of protrusions is integrally formed with a corresponding one of the plurality of wall portions.

7. The battery support tray of claim 6.

10. Each of the plurality of wall portions and the one or more protrusions corresponding to each of the plurality of wall portions have a cavity that communicates with each other. The battery support tray of claim 1 .

11. Further provided is an outer wall portion erected on the bottom portion, the one or more battery mounting areas include a plurality of battery mounting areas; The outer wall portion surrounds the plurality of battery installation areas. The battery support tray of claim 1 .

12. The outer wall portion may further include one or more outer wall protrusions each protruding toward the battery installation area. The battery support tray of claim 11.

13. The height of the outer wall protrusion in the first direction is smaller than the height of the outer wall portion in the first direction.

13. The battery support tray of claim 12.

14. a flange portion provided on the outer wall portion and extending along the first plane; The battery support tray of claim 11.

15. The bottom surface has an uneven structure including recesses provided in the one or more battery installation areas and protrusions protruding beyond the recesses. The battery support tray of claim 1 .

16. A battery support tray according to any one of claims 1 to 13; a plurality of batteries supported on the battery support tray; a container for accommodating the battery support tray and the plurality of batteries; A battery package comprising:

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