Battery pack and automobile

Abstract

The utility model discloses a battery pack and an automobile, and relates to the technical field of lithium batteries. The battery pack comprises a shell, a first sealing layer, a second sealing layer and a plurality of locking pieces, the shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are buckled up and down in the depth direction of the shell; the first sealing layer is located between the upper shell and the lower shell in the depth direction, and the top end of the lower shell is embedded in the first sealing layer. The second sealing layer covers the outer surfaces of the upper shell and the first sealing layer; the multiple locking pieces are arranged on the lower shell at intervals in the circumferential direction and sequentially penetrate through the second sealing layer, the first sealing layer and the lower shell in the thickness direction of the shell. By adopting the technology provided by the utility model, the space occupied by the sealing structure can be effectively reduced, and the internal and external volume utilization rate of the battery pack is improved.

Description

Technical Field

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

[0002] A battery pack refers to an integral unit assembled from multiple battery modules, which is used to store and provide electrical energy. Due to the variety of operating conditions of the battery pack, there are high requirements for the battery pack's dust and water resistance and condensation resistance, so the battery pack must meet the sealing requirements of IP5X to IP6X.

[0003] Among them, the sealing structure of the battery pack in the prior art is shown in Figure 1 As shown, the contact end sealing between the upper cover 50' and the lower shell 51' is combined with sealing through a sealing gasket 52' or a sealant. However, since a section of the sealing surface width is protruded along the extension direction of the upper shell, the size of the entire battery pack is large and a larger volume space is required.

[0004] For example, in the field of new energy vehicles, the layout of the entire vehicle is becoming more and more compact, and the bulge on the sealing surface can easily lead to a larger package size, which in turn affects the layout of the entire vehicle and the space utilization of the internal battery cells. Utility Model Content

[0005] The utility model provides a battery pack and a car, so as to solve the problem in the prior art that the sealing structure easily leads to a larger size of the battery pack and occupies a larger accommodating space of the car.

[0006] In order to solve the above technical problems, in the first aspect, the technical solution adopted by the present invention is to provide a battery pack, which includes: a shell, a first sealing layer, a second sealing layer and a plurality of locking members.

[0007] The shell includes an upper shell and a lower shell, and the upper shell and the lower shell are buckled together in the depth direction of the shell; the first sealing layer is located between the upper shell and the lower shell along the depth direction, wherein the top end of the lower shell is embedded in the first sealing layer.

[0008] The second sealing layer is covered on the outer surfaces of the upper shell and the first sealing layer; a plurality of locking members are arranged at intervals along the circumferential direction on the lower shell, and penetrate the second sealing layer, the first sealing layer and the lower shell in sequence along the thickness direction of the shell.

[0009] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0010] By adding a first sealing layer between the upper shell and the lower shell, a pressing plane can be formed by the first sealing layer when the upper shell and the lower shell are buckled. The second sealing layer is covered on the outer surface of the upper shell and the first sealing layer, and the locking member sequentially penetrates the second sealing layer, the first sealing layer and the lower shell, so as to achieve locking on the side of the lower shell and apply a pressing force to the pressing plane, so that the first sealing layer is compressed to complete the shell sealing.

[0011] In addition, the locking member is used to lock along the thickness direction, and the locking part of the locking member can also achieve sealing at the locking point by pressing the first sealing layer and the second sealing layer, thereby effectively reducing the space occupied by the sealing structure and improving the volume utilization inside and outside the battery pack.

[0012] In some embodiments, the first sealing layer includes a first sealing segment, a second sealing segment and a third sealing segment, the first sealing segment is in contact with the inner wall of the lower shell; the second sealing segment is in contact with the upper shell and the lower shell respectively along the depth direction; the third sealing segment is in contact with the outer wall of the lower shell.

[0013] By adopting the above technical solution, the bending structure of the first sealing layer can be pre-installed on the top of the lower shell when assembling the upper shell and the lower shell. The first sealing section and the third sealing section are both attached to the inner and outer surfaces of the lower shell by gluing, thereby effectively solving the inconvenience of the top-down covering method and the problem of easy displacement of the conventional sealing ring, and effectively avoiding the phenomenon of the sealing gasket not being installed in place.

[0014] In some embodiments, the locking member includes a bolt and a nut, and the bolt sequentially penetrates the second sealing layer, the first sealing layer and the shell along the thickness direction to be locked with the nut attached to the inner wall of the lower shell.

[0015] The above technical solution is adopted to achieve the locking of the first sealing layer and the second sealing layer by means of bolt and nut locking cooperation, so that the upper shell is tightened by locking the first sealing layer, thereby providing a pressing force in the depth direction for the second sealing section. While effectively realizing the sealing structure, the volume occupied inside and outside the battery pack is reduced.

[0016] Furthermore, the nut is a blind hole nut.

[0017] By adopting the above technical solution, the blind hole nut refers to a nut in which the through hole connects the surface layer and the inner layer without penetrating, wherein the blind hole nut has an opening facing the bolt side, further realizing absolute sealing of the bolt connection.

[0018] Furthermore, the first sealing section is located above the nut along the depth direction and fits with the nut.

[0019] The locking piece only penetrates the third sealing section of the first sealing layer, which can effectively reduce the thickness of the bolt that needs to be locked, thereby reducing leakage.

[0020] In some embodiments, the width of the upper shell along the thickness direction is smaller than that of the lower shell, so that when the upper shell is buckled with the lower shell, the upper shell and the lower shell are interference fit.

[0021] In some embodiments, the second sealing layer is protruded at the end of the upper shell along the depth direction, so that when the upper shell is buckled with the lower shell, the second sealing layer can cover the outer surface of the first sealing layer.

[0022] By adopting the above technical solution, when the upper shell and the lower shell are buckled together, the second sealing layer is sleeved outside the lower shell, so that there is a certain interference between the upper shell and the lower shell, thereby effectively improving the connection tightness between the upper shell and the lower shell.

[0023] In some embodiments, the housing is L-shaped.

[0024] By adopting the above technical solution, the upper shell is designed to be L-shaped, so as to seal the battery pack from top to bottom. As many cells as possible are arranged inside the shell to improve the space utilization of the battery pack.

[0025] In some embodiments, the upper housing has a handle at the top along the depth direction to facilitate users to transport the battery.

[0026] On the other hand, the present application also provides a car, comprising the above-mentioned battery pack, wherein the battery pack is used to provide power for the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0028] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack in the prior art;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of a battery pack provided by the utility model;

[0030] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of an embodiment of a first sealing layer of a battery pack provided by the utility model;

[0032] Figure 5 It is a three-dimensional structural schematic diagram of an embodiment of a battery pack provided by the utility model.

[0033] In the figure:

[0034] Shell—10; upper shell—11; lower shell—12; handle—13;

[0035] The first sealing layer—20; the first sealing section—21; the second sealing section—22; the third sealing section—23;

[0036] Second sealing layer - 30;

[0037] Locking member—40; Bolt—41; Nut—42;

[0038] Upper cover—50'; lower shell—51'; sealing gasket—52'. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0040] See also Figure 1 , Figures 2 to 3 As shown, Figure 1 A schematic structural diagram of an embodiment of a battery pack in the prior art is shown; Figure 2 A schematic cross-sectional structure diagram of an embodiment of a battery pack provided by the present application is shown; Figure 3 for Figure 2 A partial enlarged view of part A.

[0041] In some embodiments, the battery pack includes: a housing 10 , a first sealing layer 20 , a second sealing layer 30 , and a plurality of locking members 40 .

[0042] The shell 10 includes an upper shell 11 and a lower shell 12, which are buckled up and down along the depth direction of the shell 10; the first sealing layer 20 is located between the upper shell 11 and the lower shell 12 along the depth direction, wherein the top end of the lower shell 12 is embedded in the first sealing layer 20.

[0043] The second sealing layer 30 covers the outer surfaces of the upper shell 11 and the first sealing layer 20 ; a plurality of locking members 40 are arranged at intervals along the circumferential direction on the lower shell 12 , and penetrate the second sealing layer 30 , the first sealing layer 20 and the lower shell 12 in sequence along the thickness direction of the shell 10 .

[0044] In the embodiment of the present application, the upper shell 11 and the lower shell 12 are buckled up and down to form a battery pack structure, wherein the interior of the shell 10 is a cell accommodating cavity for arranging the cells. A first sealing layer 20 is added between the upper shell 11 and the lower shell 12 so that when the upper shell 11 and the lower shell 12 are buckled together, a pressing plane can be formed through the first sealing layer 20.

[0045] The second sealing layer 30 is covered on the outer surface of the upper shell 11 and the first sealing layer 20. For example, the second sealing layer 30 can be made of plastic such as sealing rubber. For example, the locking member 40 passes through the second sealing layer 30, the first sealing layer 20 and the lower shell 12 in the thickness direction. Figure 1 As shown, compared with the conventional method of locking the sealing gasket 52' between the upper cover 50' and the lower shell 51', the side locking effectively reduces the space occupied by the sealing structure of the battery pack and occupies less space for the internal battery cells, thereby improving the volume utilization inside and outside the battery pack.

[0046] In addition, when the locking member 40 locks the second sealing layer 30, the first housing 10 and the second housing 10 can be sealed from top to bottom, and a pressing force is applied to the pressing plane of the first sealing layer 20. The locking point of the locking member 40 can also achieve sealing at the locking point by pressing the first sealing layer 20 and the second sealing layer 30.

[0047] In some embodiments, the locking member 40 includes a bolt 41 and a nut 42 , and the bolt 41 sequentially penetrates the second sealing layer 30 , the first sealing layer 20 and the shell 10 along the thickness direction to be locked with the nut 42 attached to the inner wall of the lower shell 12 .

[0048] In the embodiment of the present application, the locking member 40 can achieve the locking of the first sealing layer 20 and the second sealing layer 30 by means of the combination of the bolt 41 and the nut 42, so that the upper shell 11 is tightened by locking the first sealing layer 20, thereby providing a depth-direction pressing force for the second sealing segment 22. While effectively realizing the sealing structure, the volume occupied inside and outside the battery pack is reduced. The locking member 40 only passes through the third sealing segment 23 of the first sealing layer 20, which can effectively reduce the thickness of the bolt 41 that needs to be locked, thereby reducing leakage.

[0049] Exemplarily, the nut 42 is a blind hole nut, wherein the blind hole nut refers to a nut 42 whose through hole connects the surface layer and the inner layer but does not penetrate through the nut 42, and the blind hole nut has an opening toward the bolt 41 side, so as to further realize the absolute sealing of the connection of the bolt 41.

[0050] See also Figure 4 As shown, Figure 4 A schematic diagram of the three-dimensional structure of an embodiment of a first sealing layer 20 of a battery pack provided in the present application is shown.

[0051] In some embodiments, in combination Figure 3 As shown, the first sealing layer 20 includes a first sealing segment 21, a second sealing segment 22 and a third sealing segment 23. The first sealing segment 21 is in contact with the inner wall of the lower shell 12; the second sealing segment 22 is in contact with the upper shell 11 and the lower shell 12 respectively along the depth direction; and the third sealing segment 23 is in contact with the outer wall of the lower shell 12.

[0052] In the embodiment of the present application, the bending structure of the first sealing layer 20 enables it to be pre-installed on the top of the lower shell 12 when the upper shell 11 and the lower shell 12 are assembled. Exemplarily, the first sealing layer 20 is a rubber sealing ring, and the first sealing section 21 and the third sealing section 23 are attached to the inner and outer surfaces of the lower shell 12 by gluing, thereby effectively solving the inconvenience of the top-down covering method and the problem that the conventional sealing ring is easy to shift, and effectively avoiding the phenomenon that the sealing gasket is not installed in place.

[0053] In some embodiments, in combination Figure 2 As shown, the first sealing section 21 is located above the nut 42 along the depth direction and fits closely with the nut 42 .

[0054] See also Figure 5 As shown, Figure 5 A three-dimensional structural schematic diagram of an embodiment of a battery pack provided in the present application is shown.

[0055] In some embodiments, the width of the upper shell 11 along the thickness direction is smaller than that of the lower shell 12 , so that when the upper shell 11 and the lower shell 12 are buckled together, the upper shell 11 and the lower shell 12 are interference fit.

[0056] Exemplarily, when the upper shell 11 is buckled with the lower shell 12, the second sealing layer 30 of the outer layer of the upper shell 11 at least partially covers the outer wall of the lower shell 12, so that there is a certain interference between the upper shell 11 and the lower shell 12, thereby improving the sealing of the cover and the tightness of the connection.

[0057] In the embodiment of the present application, the second sealing layer 30 is protruded from the end of the upper shell 11 along the depth direction, so that when the upper shell 11 is buckled with the lower shell, the second sealing layer 30 can cover the outer surface of the first sealing layer 20.

[0058] In some embodiments, housing 10 is L-shaped.

[0059] In the embodiment of the present application, the upper shell 11 is designed to be L-shaped so that the entire shell 10 is sealed from top to bottom. As many cells as possible are arranged inside the shell 10 to improve the space utilization of the battery pack.

[0060] In some embodiments, the upper housing 11 has a handle 13 at the top along the depth direction to facilitate users to transport the battery.

[0061] On the other hand, the present application also provides a car, comprising the above-mentioned battery pack, wherein the battery pack is used to provide power for the car.

[0062] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present utility model, or directly or indirectly used in other related technical fields, should be included in the protection scope of the present utility model.

Claims

1. A battery pack, characterized in that: include: A shell, the shell comprising an upper shell and a lower shell, the upper shell and the lower shell being buckled up and down along the depth direction of the shell; a first sealing layer, wherein the first sealing layer is located between the upper shell and the lower shell along the depth direction, wherein the top end of the lower shell is embedded in the first sealing layer; a second sealing layer, the second sealing layer being covered on outer surfaces of the upper shell and the first sealing layer; A plurality of locking members are arranged at intervals along the circumferential direction on the lower shell, and sequentially penetrate the second sealing layer, the first sealing layer and the lower shell along the thickness direction of the shell.

2. The battery pack according to claim 1, characterized in that: The first sealing layer includes a first sealing section, a second sealing section and a third sealing section. The first sealing section is in contact with the inner wall of the lower shell; the second sealing section is in contact with the upper shell and the lower shell respectively along the depth direction; and the third sealing section is in contact with the outer wall of the lower shell.

3. The battery pack according to claim 1, characterized in that: The locking member includes a bolt and a nut. The bolt passes through the second sealing layer, the first sealing layer and the shell in sequence along the thickness direction to be locked with the nut attached to the inner wall of the lower shell.

4. The battery pack according to claim 1, characterized in that: The width of the upper shell along the thickness direction is smaller than that of the lower shell, so that when the upper shell is buckled with the lower shell, the upper shell and the lower shell are in interference fit.

5. The battery pack according to claim 3, characterized in that: The nut is a blind hole nut.

6. The battery pack according to claim 2 or 3, characterized in that: The first sealing section is located above the nut along the depth direction and fits with the nut.

7. The battery pack according to claim 1, characterized in that: The second sealing layer is protrudingly disposed at the end of the upper shell along the depth direction, so that when the upper shell is buckled with the lower shell, the second sealing layer can cover the outer surface of the first sealing layer.

8. The battery pack according to claim 1, characterized in that: The housing is L-shaped.

9. The battery pack according to claim 1, characterized in that: The upper shell has a handle at the top along the depth direction.

10. An automobile, characterized in that: Comprising one or more battery packs according to any one of claims 1 to 9, wherein the battery pack is used to provide power for the vehicle.

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