Battery pack and power device with same

Abstract

The utility model provides a battery pack and a power device with the same, the battery pack comprises a box body, the box body comprises a shell and a cover plate, and the cover plate covers the shell; the sealing part extends in the circumferential direction of the shell to be in a ring shape, the sealing part seals a gap between the cover plate and the shell, and the compression ratio of the sealing part is within the range of 20%-70%. According to the battery pack disclosed by the utility model, the sealing element for limiting the compression ratio is arranged, so that larger contact pressure can be generated between the sealing element and the sealing surface, the sealing performance of the battery pack can be effectively improved, and the waterproof and dustproof effects of the battery pack are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power device manufacturing technical field especially a kind of battery pack and the power device with it. BACKGROUND

[0002] The battery pack in the prior art, to ensure the sealing property of battery pack, generally set sealing element between the shell and cover plate of battery pack, however, the sealing performance of the sealing element in the prior art is low, which cannot guarantee the sealing effect of battery pack. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved. To this end, the utility model provides a kind of battery pack, the battery pack can effectively improve sealing property.

[0004] The utility model further provides a kind of power device with the above-mentioned battery pack.

[0005] According to the battery pack of the utility model embodiment, including: box, the box includes shell and cover plate, the cover plate covers the shell;Sealing element, the sealing element extends as annular along the circumference of the shell, the sealing element seals the gap between the cover plate and the shell, and the compression rate of the sealing element is in the range of 20%-70%.

[0006] According to the battery pack of the utility model, the sealing element with limited compression rate is arranged, which can generate greater contact pressure between the sealing element and sealing surface, so that the sealing property of the battery pack can be effectively improved, and the waterproof and dustproof effect of the battery pack can be improved.

[0007] According to some embodiments of the utility model, the compression rate of the sealing element satisfies the relationship: 20%≤(X-Y) / X≤70%, wherein X is the thickness of the sealing element without compression, and Y is the thickness of the sealing element after compression.

[0008] According to some embodiments of the utility model, the sealing element is a rubber element.

[0009] According to some embodiments of the utility model, the shell is provided with a plurality of first fixing holes, and the plurality of first fixing holes are arranged along the circumference of the side edge of the shell towards the cover plate, the cover plate is provided with a plurality of second fixing holes corresponding to the first fixing holes one by one, and the cover plate is fixed by fasteners passing through the first fixing holes and the second fixing holes.

[0010] According to some optional embodiments of the utility model, the sealing element is provided with through holes corresponding to the first fixing holes and the second fixing holes above and below, and the fasteners are connected with the first fixing holes or the second fixing holes through the through holes.

[0011] According to some optional embodiments of the utility model, the number of through holes is multiple, multiple through holes are arranged at intervals on the sealing piece, and the distance between adjacent through holes is less than or equal to 120 mm.

[0012] According to some embodiments of the utility model, the distance from the edge of the through hole to the edge of the sealing piece is greater than or equal to 6 mm.

[0013] According to some embodiments of the utility model, the width of the sealing piece is 20-25 mm.

[0014] According to some embodiments of the utility model, the sealing piece is adhesively connected to the box.

[0015] According to the power device of the second aspect embodiment of the utility model, the battery pack according to the first aspect of the utility model is included.

[0016] According to the power device of the utility model, by setting the battery pack of the above first aspect embodiment, setting the sealing piece limiting the compression rate can make the sealing piece and the sealing surface have greater contact pressure, thereby effectively improving the sealing performance of the battery pack and improving the waterproof and dustproof effect of the battery pack.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or be known through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the battery pack according to the embodiments of the utility model;

[0019] Figure 2 is Figure 1 a schematic view of the shell and the sealing piece shown in figure 1;

[0020] Figure 3 is Figure 2 a schematic view of the sealing piece shown in figure 2.

[0021] REFERENCE NUMERALS:

[0022] 100, battery pack;

[0023] 10, box; 11, shell; 111, first fixing hole; 12, cover plate;

[0024] 20, sealing piece; 21, through hole;

[0025] 30, fastener. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0027] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Figures 1-3 The battery pack 100 according to the embodiments of the present application is described below.

[0028] Referring to Figure 1 , Figure 2 and Figure 3 , the battery pack 100 according to the embodiments of the present application comprises a box body 10 and a sealing member 20. Specifically, the box body 10 comprises a shell 11 and a cover plate 12, and the cover plate 12 covers the shell 11; the sealing member 20 extends in a ring shape along the circumference of the shell 11, and the sealing member 20 seals the gap between the cover plate 12 and the shell 11, and the compression rate of the sealing member 20 is in the range of 20%-70%.

[0029] For example, as shown in Figure 1 , Figure 2 and Figure 3 , the upper part of the shell 11 is open, the cover plate 12 covers the upper side of the shell 11, and the sealing member 20 extends in a rectangular ring structure, and a sealing surface is formed between the shell 11 and the cover plate 12, and the sealing member 20 abuts against the sealing surface. Preferably, the compression rate of the sealing member 20 can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% or 70%.

[0030] The battery pack 100 of the present application sets the sealing member 20 with a limited compression rate, which can generate greater contact pressure between the sealing member 20 and the sealing surface. This increased pressure helps to fill the small unevenness or gap on the sealing surface, thereby reducing the possibility of gas and liquid invading the inside of the battery pack 100, and further improving the sealing effect and ensuring the safety of the battery pack 100, so as to effectively improve the sealing performance of the battery pack 100, and also improve the waterproof and dustproof effect of the battery pack 100. In addition, limiting the compression rate of the sealing member 20 can avoid the influence of too small compression rate on the sealing effect of the sealing member 20, and also avoid the damage of the sealing member 20 caused by too large compression rate.

[0031] The battery pack 100 according to the embodiments of the present application sets the sealing member 20 with a limited compression rate, which can generate greater contact pressure between the sealing member 20 and the sealing surface, thereby effectively improving the sealing performance of the battery pack 100, and improving the waterproof and dustproof effect of the battery pack 100.

[0032] According to some embodiments of the present application, referring to Figure 2and Figure 3 The compression ratio of the sealing member 20 satisfies the relationship: 20%≤(X-Y) / X≤70%, wherein X is the thickness of the sealing member 20 before compression, and Y is the thickness of the sealing member 20 after compression.

[0033] According to some embodiments of the present application, referring to Figure 3 The sealing member 20 is a rubber member. Thus, the rubber member is soft and easy to compress, and can well adapt to surfaces of different shapes, so as to facilitate the sealing between the shell 11 and the cover plate 12, and further provide a tight and uniform sealing effect. At the same time, the rubber member has a good closed cell rate, which can effectively prevent dust and moisture from penetrating, so as to ensure the waterproof and dustproof effect of the battery pack 100.

[0034] Further, as shown in Figure 1 , the sealing member 20 can be sealingly connected between the box body 10 and the vehicle floor. Thus, water vapor can be prevented from entering the gap between the box body 10 and the vehicle floor, so as to ensure the waterproof and dustproof effect between the box body 10 and the vehicle floor.

[0035] According to some embodiments of the present application, referring to Figure 1 and Figure 2 The shell 11 is provided with a plurality of first fixing holes 111, that is, the shell 11 can be provided with two, three or four or more first fixing holes 111, and the plurality of first fixing holes 111 are arranged along the circumferential direction of the side edge of the shell 11 towards the cover plate 12 (such as the upper side edge of the shell 11 as shown in Figure 1 ), and the cover plate 12 is provided with a plurality of second fixing holes corresponding to the first fixing holes 111, that is, the cover plate 12 is provided with two, three or four or more second fixing holes, and the cover plate 12 is fixed by the fastener 30 passing through the first fixing hole 111 and the second fixing hole.

[0036] In this way, the first fixing hole 111 and the second fixing hole are arranged, which can facilitate the fastener 30 to pass through and fix the shell 11 and the cover plate 12, so as to improve the assembly efficiency of the box body 10. At the same time, the connection form of the fastener 30 is simple and convenient to operate, so as to reduce the assembly difficulty of the box body 10 and further improve the assembly efficiency of the box body 10.

[0037] For example, as shown in Figure 1 and Figure 2 , the shell 11 is provided with a plurality of first fixing holes 111, and the plurality of first fixing holes 111 penetrate the shell 11 in the up-down direction, and the cover plate 12 is provided with a plurality of second fixing holes, and the plurality of second fixing holes penetrate the cover plate 12 in the up-down direction, and the fastener 30 passes through the first fixing hole 111 and the second fixing hole to fix the shell 11 and the cover plate 12.

[0038] According to some optional embodiments of the present application, referring to Figure 2 and Figure 3 , the sealing member 20 is provided with through holes 21 corresponding to the first fixing hole 111 and the second fixing hole in upper and lower directions, and the fastener 30 is connected with the first fixing hole 111 or the second fixing hole through the through hole 21. In this way, the fastener 30 can be conveniently connected with the box body 10 through the sealing member 20, so that the sealing member 20 can be protected from being damaged by the fastener 30.

[0039] According to some optional embodiments of the present application, referring to Figure 2 and Figure 3 , the number of the through holes 21 is multiple, that is, the number of the through holes 21 can be two, three or four or more, and the multiple through holes 21 are arranged at intervals on the sealing member 20, and the distance between adjacent through holes 21 is less than or equal to 120 mm. In this way, by limiting the distance between adjacent through holes 21, it can be avoided that the distance between adjacent through holes 21 is too small to affect the sealing effect of the sealing member 20, and at the same time, it can also be avoided that the distance between adjacent through holes 21 is too large to cause the large spacing between adjacent fasteners 30, so that the connection strength of the shell 11 and the cover plate 12 cannot be guaranteed, therefore, by setting the distance between adjacent through holes 21 within a reasonable range, both the effect of the sealing member 20 and the connection strength of the shell 11 and the cover plate 12 can be guaranteed.

[0040] For example, as shown in Figure 2 and Figure 3 , the distance between adjacent through holes 21 can be 120 mm, 118 mm, 116 mm, 114 mm, 112 mm, 110 mm, 108 mm, 106 mm, 104 mm, 102 mm or 100 mm.

[0041] According to some embodiments of the present application, referring to Figure 3 , the distance from the edge of the through hole 21 to the edge of the sealing member 20 is greater than or equal to 6 mm. In this way, the influence of the through hole 21 on the sealing member 20 can be reduced, so that the sealing effect of the sealing member 20 can be guaranteed.

[0042] For example, as shown in Figure 3 , Figure 3 , A represents the distance from the edge of the through hole 21 to the edge of the sealing member 20, and the distance from the edge of the through hole 21 to the edge of the sealing member 20 can be 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 113 mm, 14 mm or 15 mm.

[0043] According to some embodiments of the present application, referring to Figure 2 and Figure 3The width of the sealing member 20 is 20mm-25mm. In this way, the sealing effect of the sealing member 20 on the gap between the shell 11 and the cover plate 12 can be ensured, so that the waterproof and dustproof effects of the battery pack 100 can be ensured.

[0044] For example, as shown in Figure 2 and Figure 3 , the width of the sealing member 20 can be 20mm, 21mm, 22mm, 23mm, 24mm or 25mm.

[0045] According to some embodiments of the utility model, referring to Figure 1 and Figure 2 , the sealing member 20 is adhesively connected with the box body 10. In this way, the adhesive connection process is simple and convenient to operate, so that the assembly time of the sealing member 20 can be saved, and the assembly efficiency of the battery pack 100 can be improved.

[0046] According to the power device of the second aspect of the utility model, referring to Figure 1 , Figure 2 and Figure 3 , the battery pack 100 of the first aspect of the utility model is included.

[0047] According to the power device of the embodiment of the utility model, by setting the battery pack 100 of the first aspect of the utility model, the sealing member 20 limiting the compression rate can make the sealing member 20 and the sealing surface have greater contact pressure, so that the sealing property of the battery pack 100 can be effectively improved, and the waterproof and dustproof effects of the battery pack 100 can be improved.

[0048] The following table is the experimental data of the influence of the compression rate of the sealing member 20, the distance between adjacent through holes 21 and the distance from the edge of the through hole 21 to the edge of the sealing member 20 on the sealing performance.

[0049] Number X Y Compression rate Bolt distance Effective sealing distance IPX8 test battery pack failure time Test result 1 5 3 40.00％ 120 6 168 OK 2 5 3 40.00％ 110 5.9 162 NG 3 5 3 40.00％ 121 6 155 NG 4 4.8 2.5 47.92％ 110 8 175 OK 5 4.8 1 79.17％ 90 10 110 NG 6 12 8 33.33％ 90 12 181 OK 7 5 4.5 10.00％ 80 11 154 NG 8 8 4.8 40.00％ 95 6.5 178 OK 9 7 3.5 50.00％ 105 8.5 172 OK

[0050] In the table, IPX8 means that the battery pack 100 is immersed in 1m water depth, and no water enters the battery pack 100 after immersion for 7 days (168 hours), and the test result OK means qualified, and the test result NG means unqualified.

[0051] From the above experimental data, it can be seen that from the second group of experimental data, the distance from the edge of the through hole 21 to the edge of the sealing member 20 should be greater than or equal to 6mm, from the third group of experimental data, the distance between adjacent through holes 21 should be less than or equal to 120mm, and from the fifth and seventh groups of experimental data, the compression rate of the sealing member 20 should be in the range of 20%-70%.

[0052] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relation based on the orientation or positional relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0053] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0054] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0055] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0056] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized by, The application relates to a battery pack. The battery pack comprises a box body and a sealing element. The box body comprises a shell and a cover plate.

2. The battery pack of claim 1, wherein, The sealing element is annular along the circumference of the shell and seals the gap between the cover plate and the shell.

3. The battery pack of claim 1, wherein, The compression rate of the sealing element is in the range of 20%-70%.

4. The battery pack of claim 1, wherein, The compression rate of the sealing element satisfies the relationship: 20%<= (X-Y) / X <=70%, wherein X is the thickness of the sealing element without compression, and Y is the thickness of the sealing element after compression. The sealing element is a rubber element.

5. The battery pack of claim 4, wherein, The shell is provided with a plurality of first fixing holes.

6. The battery pack of claim 5, wherein, The cover plate is provided with a plurality of second fixing holes corresponding to the first fixing holes.

7. The battery pack of claim 5, wherein, The sealing element is provided with through holes corresponding to the first fixing holes and the second fixing holes.

8. The battery pack of claim 1, wherein, The number of the through holes is multiple.

9. The battery pack of claim 1, wherein, The distance between adjacent through holes is less than or equal to 120mm.

10. A power plant characterized by The distance from the edge of the through hole to the edge of the sealing element is greater than or equal to 6mm. The width of the sealing element is 20mm-25mm. The sealing element is bonded to the box body. The battery pack comprises any one of claims 1-9.

Images