CN209880677U

CN209880677U - Housing for accommodating battery and battery pack

Info

Publication number: CN209880677U
Application number: CN201920341404.5U
Authority: CN
Inventors: 李长江; 郭海军
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2019-12-31
Anticipated expiration: 2029-03-18

Abstract

One aspect of the present application provides a case for accommodating a battery, including: a housing; the upper cover is fixed on the shell; and a seal ring mounted between the upper cover and the housing; one of the upper cover and the sealing ring is provided with a protrusion, and the other is provided with a through hole which is in interference fit with the protrusion. Another aspect of the present application provides a battery assembly, which includes a battery and the above housing; wherein the battery is accommodated in the case. An object of this application is to provide a sealing washer is difficult for droing, and simple structure's shell and battery pack for holding the battery.

Description

Housing for accommodating battery and battery pack

Technical Field

The present application relates to the field of energy sources, and more particularly, to a housing and battery assembly for housing a battery.

Background

At present, most of battery pack upper covers, sealing rings and shells are not provided with a sealing ring anti-falling structure during assembly. Therefore, after the battery pack upper cover is assembled with the sealing ring, when the battery pack upper cover is assembled with the shell, the sealing ring can fall off from the battery pack upper cover due to self gravity factors. The situation can cause assembly difficulty, the sealing ring is not assembled in place, the sealing effect is influenced, and even water enters the shell. It is urgently required to solve this problem.

SUMMERY OF THE UTILITY MODEL

To solve the problems in the related art, an object of the present application is to provide a battery pack and a battery case for accommodating a battery, in which a seal ring is not easily detached and has a simple structure.

To achieve the above object, an aspect of the present application provides a case for accommodating a battery, including: a housing; the upper cover is fixed on the shell; and a seal ring mounted between the upper cover and the housing; one of the upper cover and the sealing ring is provided with a protrusion, and the other is provided with a through hole which is in interference fit with the protrusion.

According to one embodiment of the application, the protrusion is provided on an end surface of the upper cover that is engaged with the housing, and the through hole is provided on the seal ring.

According to an embodiment of the application, the upper cover is provided with the mounting groove, and the mounting groove includes the tank bottom surface and by the first side and the second side of the relative setting of tank bottom surface extension, and wherein, the sealing washer sets up in the mounting groove.

According to one embodiment of the application, the protrusion is provided on the bottom surface of the groove.

According to an embodiment of the present application, the housing has a positioning skirt, and the protrusion is located between the first side and the positioning skirt in a cross section perpendicular to a height direction of the housing.

According to an embodiment of the present application, the housing further includes a plurality of protrusions disposed at intervals from each other and a plurality of through holes in one-to-one correspondence with positions of the plurality of protrusions.

According to one embodiment of the application, the height of the protrusion is equal to or greater than the thickness of the sealing ring.

According to one embodiment of the application, the height of the protrusion exceeds the thickness of the sealing ring by 0.5mm to 1 mm.

According to one embodiment of the application, the interference fit between the through hole and the protrusion is H6/N5 or N6/H5 or H7/p 6.

Another aspect of the present application provides a battery assembly, including a battery and the housing of any of the above embodiments; wherein the battery is accommodated in the case.

The beneficial technical effect of this application lies in:

in the assembling process, the sealing ring is effectively prevented from falling off due to self gravity through interference fit between the protrusions and the through holes. And interference fit's arch and through-hole simple structure, simple to operate have good anti-drop effect, have improved sealing washer assembly reliability.

Drawings

FIG. 1 is a schematic view of one embodiment of a housing for housing a battery of the present application;

FIG. 2 is a disassembled schematic view of the housing for housing the battery of the present application;

FIG. 3a is a schematic top view of the upper cover of the present application;

FIG. 3b is a schematic side view of the upper cover of the present application;

FIG. 3c is a schematic bottom view of the upper cover of the present application;

FIG. 4 is a schematic view of a seal ring of the present application;

FIG. 5 is a perspective view of an embodiment of the present application with the seal ring assembled with the top cover;

FIG. 6 is a schematic bottom view of a seal ring and a top cover of an embodiment of the present application;

FIG. 6a is an enlarged partial view of a projection and through hole assembly according to an embodiment of the present application;

FIG. 6b is a schematic cross-sectional view of the embodiment of the present application shown in FIG. 6a after the protrusions and through-holes are assembled;

FIG. 6c is an enlarged partial view of a projection in assembly with a through hole in accordance with yet another embodiment of the present application;

FIG. 6d is a schematic cross-sectional view of the embodiment of the present application shown in FIG. 6c after the protrusions and through-holes have been assembled;

FIG. 6e is an enlarged partial view of a projection in assembly with a through hole in accordance with yet another embodiment of the present application;

FIG. 6f is a schematic cross-sectional view of the embodiment of the present application shown in FIG. 6e after the protrusions and through-holes have been assembled;

FIG. 7a is a schematic view of the position of a projection in one embodiment of the present application;

FIG. 7b is an enlarged partial view of the position of the protrusion of the embodiment of FIG. 7a of the present application.

Detailed Description

The following describes embodiments of the present application in detail with reference to fig. 1 to 7b of the drawings.

As shown in fig. 1-2, the present application provides a housing 10 for housing a battery. In one embodiment of the present application, a case 10 for accommodating a battery includes: a housing 12; an upper cover 14, wherein the upper cover 14 is fixed on the shell 12; and a seal ring 16 installed between the upper cover 14 and the housing 12; one of the upper cover 14 and the seal ring 16 is provided with a projection 18, and the other is provided with a through hole 20, the through hole 20 being in interference fit with the projection 18.

In the present embodiment, the packing 16 is installed between the upper cover 14 and the housing 12, so that sealability between the upper cover 14 and the housing 12 is improved. Of course, the sealing ring 16 is disposed along the edge contour of the upper cover 14 and/or the positioning skirt 121 of the housing 12 in a manner that can both seal the gap between the upper cover 14 and the housing 12 and save material for the sealing ring 16. In some embodiments, a seal ring 16 is mounted to the upper cover 14. In other embodiments, the sealing ring 16 may be mounted to the positioning skirt 121 of the housing 12 without affecting the sealing of the housing 10 and is contemplated by the present application.

In the present embodiment, the upper cover 14 may be provided with a plurality of protrusions 18, while the packing 16 is provided with through-holes 20 corresponding to the protrusions 18. Of course, the upper cover 14 may be provided with a plurality of through holes 20, and the seal ring 16 may be provided with projections 18 corresponding to these through holes 20. In addition, the through hole 20 and the projection 18 are provided in an interference fit, i.e., the size of the through hole 20 is smaller than the size of the projection 18. The protrusion 18 and the through hole 20 are in interference fit, so that the sealing ring 16 can be firmly mounted on the upper cover 14, and the anti-falling effect is good. Moreover, the bulge 18 is in interference fit with the through hole 20, the structure is simple, the method is economical and practical, and the reliability of the sealing ring 16 in assembly is improved. In addition, in the present embodiment, the protrusions 18 may have the same or different dimensional tolerances, without reducing the anti-separation effect of the seal ring 16.

It should be noted that in other embodiments, the sealing ring 16 may have both the through hole 20 and the protrusion 18; accordingly, the upper cover 14 has both the protrusion 18 that is interference fit with the through hole 20 of the seal ring 16 and the through hole 20 that is interference fit with the protrusion 18 of the seal ring 16. Thus, the seal ring 16 is more tightly connected to the upper cover 14 and is less likely to fall off. Of course, in some embodiments, the same or different dimensional tolerances may be used for the projections 18 without detracting from the anti-separation effect of the seal ring 16.

In some embodiments, the cover 14 is secured to the housing 12 by fasteners 22. Specifically, the positioning skirt 121 of the housing 12 is provided with a first mounting hole 123, and the upper cover 14 is provided with a second mounting hole 145. And when the upper cover 14 is assembled to the housing 12, the first mounting holes 123 and the second mounting holes 145 correspond one-to-one and are aligned such that the fasteners 22 pass through the second mounting holes 145 to reach the first mounting holes 123 and are tightened to secure the upper cover 14 to the housing 12. In addition, the seal ring 16 is provided with a third mounting hole 161. The third mounting holes 161 are in one-to-one correspondence with, and aligned with, the second mounting holes 145 when the seal ring 16 is mounted to the upper cover 14. The fastener 22 passes through the third mounting hole 161 to reach the first mounting hole 123, so that the fastener 22 can fix the upper cover 14 to the housing 12. In some embodiments, the fasteners 22 are screws.

Additionally, in some other embodiments, the sealing ring 16 may be secured to the upper cover 14 in other ways, for example, the sealing ring 16 is adhered to the upper cover 14 by glue; the sealing ring 16 is fixed on the upper cover 14 through a thread gluing; or the seal ring 16 is fixed to the upper cover 14 or the like by a small screw. It is within the contemplation of the present application that the gasket 16 may be secured to the cover 14 and not easily removed, and that it may help to improve the sealing of the housing 10. Of course, other fixing means (such as glue bonding, thread-gluing, screwing, etc.) may be present in the housing 10 together with the interference fit through hole 20 and the protrusion 18, which are used as an auxiliary means to cooperate with the interference fit, so that the sealing ring 16 is firmly fixed to the upper cover 14.

The shape of the projection 18 may be arbitrary, and may be, for example, a cylindrical shape, a prismatic shape, a spherical shape, or the like. Accordingly, the through hole 20 is shaped to be able to cooperate with the protrusion 18, such as circular, square, triangular, etc. It is within the contemplation of the present application that the shape of the projections 18 and through-holes 20 will not affect the effect of the interference fit.

As shown in fig. 2 to 3c, in one embodiment of the present application, a protrusion 18 is provided on the end surface of the upper cover 14 that mates with the housing 12, and a through hole 20 is provided on the seal ring 16.

In the present embodiment, the end surface of the upper cover 14 faces the seal ring 16 and the housing 12 in the mounted housing 10. In other words, the seal ring 16 is disposed between the end face and the housing 12.

In the present embodiment, a projection 18 is provided on the end face of the upper cover 14, and a through hole 20 is provided in the seal ring 16. The seal ring 16 does not have the protrusion 18, so that the structure of the seal ring 16 is simplified, and the anti-drop effect of the seal ring 16 is still good due to the interference fit between the protrusion 18 and the through hole 20. Moreover, only the sealing ring 16 with the through hole 20 is arranged, and the disassembly and the replacement are convenient. Accordingly, the end surface of the upper cover 14 has only the protrusions 18, and the structure is also simplified, so that the upper cover 14 is easy to manufacture. Moreover, if the upper cap 14 has the through hole 20 and the packing 16 has the projection 18, when the projection 18 of the packing 16 is accidentally broken, the broken projection 18 remains in the through hole 20 of the upper cap 14 due to interference, which causes difficulty in replacing the packing 16. Of course, this difficulty can be overcome in practice, for example, by modifying the material of the sealing ring 16 to have better mechanical properties, but this is not further described in this application.

As shown in fig. 2 and 3c, in one embodiment of the present application, the upper cover 14 is provided with a mounting groove 141, the mounting groove 141 including a groove bottom 142 and first and second oppositely disposed sides 143 and 144 extending from the groove bottom 142, wherein the sealing ring 16 is disposed in the mounting groove 141.

In the present embodiment, the mounting groove 141 is provided along the contour of the side edge of the upper cover 14. This effectively seals the gap between the cover 14 and the housing 12 and also saves material on the sealing ring 16.

In this embodiment, the positioning skirt 121 of the housing 12 is positioned in the mounting groove 141 when the housing 10 is mounted. The mounting groove 141 also allows the housing 12 to fit well with the upper cover 14 without shifting during installation.

In the present embodiment, the mounting groove 141 has a limiting function. Specifically, the sealing ring 16 is disposed in the mounting groove 141, and due to the existence of the first side 143 and the second side 144, the sealing ring 16 is sandwiched between the first side 143 and the second side 144, so that the sealing ring 16 cannot be easily displaced to cause the hermetic sealing of the housing 10 to be damaged. Of course, in this embodiment, the height of the first side 143 and the second side 144 is greater than the thickness of the sealing ring 16, and the width of the groove bottom 142 is also slightly greater than the width of the sealing ring 16, so that the sealing ring 16 can be exactly fitted and confined in the mounting groove 141, thereby improving the sealing performance of the housing 10.

As shown in fig. 2 and 3c, in one embodiment of the present application, the protrusions 18 are disposed on the channel floor 142.

In this embodiment, there are a plurality of projections 18 disposed on the slot floor 142. The protrusions 18 distributed on the bottom surface 142 may be distributed symmetrically or randomly. I.e. the distribution of the projections 18 is axisymmetric or centrosymmetric or random. Of course, in various embodiments, the distribution of the projections 18 is preferably axisymmetric. This arrangement allows the gasket 16 to close any gap between the upper cover 14 and the housing 12, and provides a good seal.

In the present embodiment, the height of the protrusion 18 is less than or equal to the height of the first side 143 and the second side 144. The projection 18 thus prevents the skirt 121 or other object being positioned from being knocked off by excessive length.

As shown in fig. 1, 2 and 7a to 7b, in one embodiment of the present application, the protrusion 18 is located between the first side 143 and the positioning skirt 121 in a cross section perpendicular to the height direction of the housing 12. That is, the height direction of the projection 18 coincides with the height direction of the first side 143.

In this embodiment, the location of the projections 18 should avoid adversely affecting the mounting of the cover 14. Thus, when the cover 14 and the housing 12 are assembled, the protrusion 18 should be located between the positioning skirt 121 and the first side 143, or between the positioning skirt 121 and the second side 144. Of course, the size of the protrusion 18 is smaller than the gap between the positioning skirt 121 and the first side 143, and/or smaller than the gap between the positioning skirt 121 and the second side 144.

As shown in fig. 2, 3c, 4 and 5, in one embodiment of the present application, the housing 10 further includes a plurality of protrusions 18 spaced apart from each other and a plurality of through holes 20 corresponding to the plurality of protrusions 18 in position one to one.

In this embodiment, the protrusions 18 are spaced to facilitate securing each portion of the gasket 16 to the groove bottom surface 142 such that each portion of the gasket 16 does not fall off. Of course, in the present embodiment, the number of the protrusions 18 is arbitrary as long as the seal ring 16 is not easily detached from the groove bottom surface 142. In addition, the spaced apart projections 18 allow the through holes 20 of the seal ring 16 to be spaced apart. Thus. The through holes 20 are distributed on the sealing ring 16 uniformly, so that on one hand, all parts of the sealing ring 16 are fixed in the mounting groove 141, and on the other hand, the through holes 20 are not too dense at a certain part of the sealing ring 16 to be easily broken.

As shown in fig. 2 and 5-6 f, in one embodiment of the present application, the height of the protrusion 18 is equal to or greater than the thickness of the sealing ring 16.

In the present embodiment, the height of the protrusion 18 is equal to or greater than the thickness of the gasket 16 so that the through hole 20 can fit well with the protrusion 18. However, in other embodiments, the height of the partial protrusion 18 may be smaller than the thickness of the sealing ring 16, and the anti-falling effect of the sealing ring 16 will not be reduced. In other embodiments, the height of the protrusion 18 is less than the thickness of the seal ring 16.

In one embodiment of the present application, the height of the protrusion 18 exceeds the thickness of the seal ring 16 by 0.5mm to 1 mm.

In the present embodiment, the exceeding range is set between 0.5mm and 1mm (inclusive), which is not only beneficial to the good matching between the through hole 20 and the protrusion 18, but also can prevent the protrusion 18 from being easily broken due to overlong length, and also saves cost. Of course, in other embodiments, the out-of-range may be set between other values, such as between 0.1mm and 0.5mm (inclusive), or between 1mm and 1.5mm (inclusive), or between 1.5mm and 2.0mm (inclusive), and so forth.

In one embodiment of the present application, the interference fit between the through hole 20 and the protrusion 18 is H6/N5 or N6/H5 or H7/p 6.

In the present embodiment, if the dimensional tolerance between the through hole 20 and the protrusion 18 is too large, the through hole 20 and the protrusion 18 are not easily assembled, and if the dimensional tolerance between the through hole 20 and the protrusion 18 is too small, the seal ring 16 is easily detached, thereby reducing the detachment prevention effect of the seal ring 16. The interference fit is selected from H6/N5, N6/H5 or H7/p6, the assembly difficulty of the through hole 20 and the bulge 18 is not high, and the sealing ring 16 is not easy to fall off. Of course, in other embodiments, other dimensional tolerances may be selected, and the present application is not limited to the above dimensional tolerances.

Another aspect of the present application provides a battery assembly including a battery and the housing 10 of any of the above embodiments, and the battery is accommodated in the case 12.

In the present embodiment, since the battery is accommodated in the case 12, the battery can be isolated from the outside. And the sealing property of the housing 10 is good, and the entry of the external liquid and the like into the housing 10 is effectively prevented. In addition, the sealing ring 16 is not easily separated from the upper cover 14, so that the process of disassembling and assembling the housing 10 of the battery assembly is smoother.

The following description will describe embodiments of the present application with reference to fig. 1 to 7b of the drawings.

Fig. 1 shows the assembled housing 10. Of course, FIG. 1 is also a state diagram of the use of one embodiment of the housing 10. In fig. 1, the upper cover 14 is secured to the housing 12 by fasteners 22. The housing 12 has a plurality of ribs on an outer surface thereof, and the ribs extend along a height direction of the housing 12. The positioning skirt 121 of the housing 12 is provided with a first mounting hole 123. Also, the first mounting hole 123 is provided at one end of the rib, and is provided along a direction in which the rib extends. The outer profile of the upper cover 14 is provided with a second mounting hole 145. The first mounting hole 123 and the second mounting hole 145 are aligned such that the fastener 22 can pass therethrough to secure the upper cover 14 to the housing 12. In addition, a handle is provided on the outward end surface of the upper cover 14.

Fig. 2 shows the housing 10 in a disassembled view, and the fasteners 22 are not shown. Of course, FIG. 2 is also a state diagram of the use of one embodiment of the housing 10. In fig. 2, the end surface of the upper cover 14 facing the housing 12 is mounted with a gasket 16, and the gasket 16 is provided with a third mounting hole 161. And the third mounting hole 161 is aligned with the first mounting hole 123 and the second mounting hole 145 so that the fastener 22 can pass through. An installation groove 141 is provided along the outermost contour of the upper cover 14 on the end surface on which the seal ring 16 is installed. The packing 16 is installed in the installation groove 141, and the packing 16 is shaped to conform to the installation groove 141. A protrusion 18 is provided in the installation groove 141, and the height of the protrusion 18 is greater than the thickness of the packing 16. In addition, the height of the side of the mounting groove 141 is also greater than the thickness of the sealing ring 16, i.e., the height of the first side 143 and the second side 144 is greater than the thickness of the sealing ring 16. Also, the height of the projection 18 is less than the height of the first and second side edges 143 and 144.

Fig. 3a to 3c respectively show a schematic top view, a schematic side view and a schematic bottom view of the upper cover 14. In fig. 3a to 3c, the distribution positions of the second mounting holes 145 are symmetrical and are uniformly distributed. And the second mounting hole 145 passes through the slot bottom 142. The projection 18 is disposed on the groove bottom surface 142. Likewise, the distribution positions of the protrusions 18 are also symmetrical and are uniformly distributed. The projection 18 is positioned closer to the first side edge 143 than to the second side edge 144. But the projection 18 is not in contact with the first side 143.

Fig. 4 shows a sealing ring 16. In fig. 4, the seal ring 16 is provided with a third mounting hole 161. The distribution positions of the third mounting holes 161 are also symmetrical and uniformly distributed. The seal ring 16 is also provided with a through hole 20. The distribution positions of the through holes 20 are also symmetrical and uniformly distributed.

Fig. 5 is a schematic view showing that the packing 16 is mounted in the mounting groove 141. In fig. 5, the packing 16 is disposed in the mounting groove 141. The shape of the sealing ring 16 is consistent with the shape of the mounting groove 141, and the sealing ring can be just matched in the mounting groove 141. The third mounting hole 161 is aligned with the second mounting hole 145. The projection 18 is opposite to the through hole 20 and passes through the through hole 20. The protrusion 18, the through hole 20, the second mounting hole 145, and the third mounting hole 161 are closer to the first side 143 than the second side 144, but do not contact the first side 143.

Fig. 6 is a bottom view of the gasket 16 assembled with the upper cover 14. In fig. 6, the shape of the seal ring 16 is matched to the shape of the mounting groove 141, and the seal ring 16 is fitted in the mounting groove 141. The projection 18 passes through the through hole 20. And the third mounting hole 161 is aligned with the second mounting hole 145.

In fig. 6a, the shape of the through-hole 20 is cylindrical. Correspondingly, the projections 18 are also cylindrical in shape.

Figure 6b shows a cross-sectional view of the embodiment of figure 6 a. In fig. 6b, the projection 18 is completely assembled with the through hole 20 and the height of the projection 18 is greater than the thickness of the sealing ring 16.

In fig. 6c, the shape of the through hole 20 is a triangular prism. Accordingly, the shape of the projection 18 is also triangular prism-like.

Figure 6d shows a cross-sectional view of the embodiment of figure 6 c. In fig. 6d, the protrusion 18 is completely assembled with the through hole 20 and the height of the protrusion 18 is greater than the thickness of the sealing ring 16.

In fig. 6e, the shape of the protrusion 18 is: the middle part is a cuboid, and the two ends are semi-cylinders. Accordingly, the shape of the through-hole 20 is also: the middle part is a cuboid, and the two ends are semi-cylinders;

figure 6f shows a cross-sectional view of the embodiment of figure 6 e. In fig. 6f, the projection 18 is completely assembled with the through hole 20 and the height of the projection 18 is greater than the thickness of the sealing ring 16.

Fig. 7a shows the protrusion 18 positioned between the positioning skirt 121 and the first side 143. In fig. 7a, the projection 18 is located between the first side 143 and the positioning skirt 121 in a cross section perpendicular to the height direction of the housing 12. The height direction of the projection 18 coincides with the height direction of the first side 143, and the height of the projection 18 is smaller than the height of the first side 143.

Fig. 7b is an enlarged partial schematic view of the location of the protrusion 18 of the embodiment of fig. 7 a. In fig. 7b, the projection 18 is located between the first side 143 and the positioning skirt 121 in a cross section perpendicular to the height direction of the housing 12. The height direction of the projection 18 coincides with the height direction of the first side 143, and the height of the projection 18 is smaller than the height of the first side 143.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A housing for containing a battery, comprising:

a housing;

the upper cover is fixed on the shell; and

a seal ring mounted between the upper cover and the housing;

one of the upper cover and the sealing ring is provided with a protrusion, and the other is provided with a through hole which is in interference fit with the protrusion.

2. The housing according to claim 1, wherein the protrusion is provided on an end surface of the upper cover that engages with the housing, and the through hole is provided on the seal ring.

3. The enclosure of claim 1, wherein the upper cover is provided with a mounting groove comprising a groove bottom surface and oppositely disposed first and second sides extending from the groove bottom surface, wherein the seal ring is disposed in the mounting groove.

4. The enclosure of claim 3, wherein the protrusion is disposed on the slot bottom surface.

5. The housing of claim 3, wherein the case has a positioning skirt, and wherein the projection is located between the first side and the positioning skirt in a cross section perpendicular to a height direction of the case.

6. The housing of claim 1, further comprising a plurality of protrusions spaced apart from each other and a plurality of through holes in one-to-one correspondence with the plurality of protrusion positions.

7. The housing of claim 1, wherein the protrusion has a height that is greater than or equal to a thickness of the seal ring.

8. The housing of claim 7, wherein the height of the protrusion exceeds the thickness of the seal ring by 0.5mm to 1 mm.

9. The housing of claim 1, wherein the interference fit between the through hole and the protrusion is H6/N5 or N6/H5 or H7/p 6.

10. A battery assembly comprising a battery and the housing of any one of claims 1 to 9; wherein the battery is accommodated in the case.