Battery pack sealing structure and battery pack structure

Abstract

The utility model provides a battery pack sealing structure and a battery pack structure, and belongs to the field of new energy batteries. The structure comprises a box body, a box cover and an annular sealing gasket, the box cover is arranged on the box body in a covering mode, the box body is provided with a first matching face and a first installation face which face the same side, the box cover is provided with a second matching face opposite to the first matching face and a second installation face opposite to the first installation face, and the first installation face and the second installation face are attached and fixedly connected. The first matching face and the second matching face are arranged in a spaced mode, and the annular sealing gasket is arranged around the box body and clamped between the first matching face and the second matching face. By adopting the battery pack sealing structure and the battery pack structure provided by the embodiment of the utility model, the problems that the matching distance between the box body and the box cover is too large and the occupied space is relatively large in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and in particular to a battery pack sealing structure and a battery pack structure. Background Art

[0002] At present, with the rapid development of electric vehicles, the research and application of electric vehicles are receiving more and more attention. As the power source of electric vehicles, electric vehicle power battery packs are an important part of electric vehicles. Power battery packs are generally composed of power batteries, boxes and boxes. The power batteries are encapsulated inside the boxes and boxes. The sealing performance between the box and the box determines the service life of the battery. When the sealing performance is insufficient, the service life of the battery may be shortened.

[0003] The battery pack sealing structure in the existing related technology usually adopts the form of a sealing gasket, which is set between the contact surface of the box body and the box cover, and fixed on the contact surface by bolts. To seal in this way, it is necessary to open a hole in the sealing gasket, and at the same time increase the matching distance between the box body and the box cover. With the increasing battery power requirements of electric vehicle fleets, the battery pack power needs to be increased, but the battery pack installation space originally provided by the whole vehicle is limited.

[0004] In the existing battery pack sealing structure of the related art, the fitting distance between the box body and the box cover is too large, and a large space is occupied. Utility Model Content

[0005] The embodiment of the utility model provides a battery pack sealing structure and a battery pack structure, which can solve the problem that the matching distance between the box body and the box cover is too large and occupies a large space in the prior art. The technical solution is as follows:

[0006] In a first aspect, a battery pack sealing structure includes: a box body, a box cover and an annular sealing gasket,

[0007] The box cover is arranged on the box body, the box body has a first mating surface and a first mounting surface facing the same side, the box cover has a second mating surface opposite to the first mating surface and a second mounting surface opposite to the first mounting surface, the first mounting surface and the second mounting surface are fitted and fixedly connected, the first mating surface and the second mating surface are arranged at intervals, and the annular sealing gasket is arranged around the box body and clamped between the first mating surface and the second mating surface.

[0008] Optionally, the first mounting surface and the second mounting surface are connected by bolts.

[0009] Optionally, a mating boss is protruding from the first mounting surface, the first mating surface is located on the mating boss, a mounting portion recessed toward the box body is provided on the edge of the box cover, and the second mounting surface is located on the mounting portion.

[0010] Optionally, a mounting groove is formed on the first mounting surface, the first matching surface is located at the bottom of the mounting groove, and the annular sealing gasket is arranged in the mounting groove.

[0011] Optionally, one side of the mounting groove is connected to an edge of the box body.

[0012] Optionally, the annular sealing gasket is a rubber piece.

[0013] In the second aspect, a battery pack structure includes the aforementioned battery pack sealing structure and also includes a battery cell, the box body includes a bottom plate, first limit blocks are arranged at both ends of the bottom plate, the battery cell is arranged between two of the first limit blocks, a second limit block is arranged between the two first limit blocks, and a limit groove matching the second limit block is arranged at the bottom of the battery cell.

[0014] Optionally, a liquid cooling groove is opened in the bottom plate, and the liquid cooling groove is arranged along the length direction of the bottom plate.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0016] A battery pack sealing structure and a battery pack structure provided by an embodiment of the utility model are directly connected by a first mounting surface and a second mounting surface, and an annular sealing gasket is arranged on one side of the first mounting surface and the second mounting surface, which can not only meet the sealing performance required by the battery pack, but also reduce the fitting distance between the box body and the box cover, so that the overall volume of the battery pack is reduced, and can effectively solve the problem of excessively large fitting distance between the box body and the box cover and large occupied space in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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.

[0018] Figure 1 It is a schematic diagram of the overall structure of the battery pack provided by the embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the box structure provided by an embodiment of the utility model;

[0020] Figure 3 The utility model embodiment provides Figure 2 A magnified schematic diagram of point A;

[0021] Figure 4 This is a schematic diagram of the matching of the box and the battery cell provided in the embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the bottom structure of the battery cell provided by an embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the first embodiment provided by the utility model;

[0024] Figure 7 It is a schematic diagram of the structure of the second embodiment provided by the embodiment of the utility model;

[0025] Figure 8 It is a schematic diagram of the structure of the third embodiment provided by the embodiment of the utility model.

[0026] In the figure: 1-box body; 101-matching boss; 11-first matching surface; 111-first mounting surface; 112-mounting groove; 12-bottom plate; 13-first limiting block; 14-second limiting block; 2-box cover; 201-mounting part; 21-second matching surface; 211-second mounting surface; 3-annular sealing gasket; 4-battery cell; 41-limiting groove; 5-liquid cooling tank; 6-mounting protrusion. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the battery pack provided by the embodiment of the utility model; Figure 2 It is a schematic diagram of the box structure provided by an embodiment of the utility model; Figure 3 The utility model embodiment provides Figure 3 A magnified schematic diagram of point A; Figure 4 This is a schematic diagram of the matching of the box and the battery cell provided in the embodiment of the utility model; Figure 5 This is a schematic diagram of the bottom structure of the battery cell provided by an embodiment of the utility model; Figure 6 This is a schematic diagram of the structure of the first embodiment provided by the utility model; Figure 7 It is a schematic diagram of the structure of the second embodiment provided by the embodiment of the utility model; Figure 8 This is a schematic diagram of the structure of the third embodiment provided by the utility model. Figures 1 to 8A battery pack sealing structure shown in the figure includes: a box body 1, a box cover 2 and an annular sealing gasket 3, the box cover 2 is covered on the box body 1, the box body 1 has a first mating surface 11 and a first mounting surface 111 facing the same side, the box cover 2 has a second mating surface 21 opposite to the first mating surface 11 and a second mounting surface 211 opposite to the first mounting surface 111, the first mounting surface 111 and the second mounting surface 211 are in contact with and fixedly connected, the first mating surface 11 and the second mating surface 21 are arranged at intervals, and the annular sealing gasket 3 is arranged around the box body 1 and clamped between the first mating surface 11 and the second mating surface 21.

[0029] For example, in the embodiment of the utility model, the box cover 2 is arranged on the box body 1, so that the box cover 2 and the box body 1 form a closed container space, which is convenient for placing the battery cell and other devices into the closed space later. The first mating surface 11 and the second mating surface 21 are arranged at the matching position of the box body 1 and the box cover 2. The first mating surface 11 and the second mating surface 21 are arranged along the edges of the box body 1 and the box cover 2, and the first mounting surface 111 and the second mounting surface 211 are located at the outermost edge of the matching of the box body 1 and the box cover 2. The first mounting surface 111 and the second mounting surface 211 are fitted together. The box body 1 and the box cover 2 are fixedly connected together, so that the internal space of the box body 1 and the box cover 2 can be protected. An annular sealing gasket 3 is provided on one side of the box body 1 where the first mounting surface 111 and the second mounting surface 211 are joined, so that after the first mounting surface 111 and the second mounting surface 211 are installed and fixed, the annular sealing gasket 3 forms a sealing structure under the pressure of the first matching surface 11 and the second matching surface 21, so that the internal space formed by the box body 1 and the box cover 2 is completely isolated from the outside, and the devices subsequently placed in the internal space are sealed and protected.

[0030] A battery pack sealing structure and a battery pack structure provided by an embodiment of the utility model are directly connected by a first mounting surface 11 and a second mounting surface 21, and an annular sealing gasket 3 is arranged on one side of the first mounting surface 11 and the second mounting surface 21. Compared with the traditional sealing structure in which the sealing ring is arranged at the fitting installation position of the box body and the box cover, the present sealing structure can not only meet the sealing performance required by the battery pack, but also reduce the fitting distance between the box body 1 and the box cover 2, thereby reducing the overall volume of the battery pack, and can effectively solve the problem in the prior art that the fitting distance between the box body and the box cover is too large and occupies a large space.

[0031] Optionally, the first mounting surface 111 and the second mounting surface 211 are connected by bolts.

[0032] For example, in the embodiment of the utility model, holes are opened on the first mounting surface 111 and the second mounting surface 211, and bolts are passed through the holes, and the first mounting surface 111 and the second mounting surface 211 are tightly connected together by the bolts. Through this connection method, when the bolts are installed, the force requirements between the box body 1 and the box cover 2 can be met. When the box body 1 and the box cover 2 need to be disengaged, for example, when a battery cell or other device is placed, or when the battery pack structure needs to be opened for maintenance, it is more convenient, and the purpose can be achieved by simply removing the bolts. Therefore, the bolt connection between the first mounting surface 111 and the second mounting surface 211 improves the convenience of operation of the battery pack sealing structure.

[0033] Optionally, a mating boss 101 is protruding from the first mounting surface 111 , the first mating surface 11 is located on the mating boss 101 , a mounting portion 201 recessed toward the box body 1 is provided on the edge of the box cover 2 , and the second mounting surface 211 is located on the mounting portion 201 .

[0034] For example, Figure 6 The figure shows the first embodiment of the present invention. In the prior art, the box body 1 is usually a rectangular bottom plate 12. In order to install the annular sealing gasket 3, a mounting protrusion 6 is protruded upward on the bottom plate 1, and a mating boss 101 is protruded outward on the mounting protrusion 6. The first mating surface 11 is arranged on the mating boss 101. In the prior art, the annular sealing gasket 3 is not only arranged between the first mating surface 11 and the second mating surface 21, but also extended between the first mounting surface 111 and the second mounting surface 211, and then the first mounting surface 111 and the second mounting surface 211 are fixed by bolts, thereby increasing the distance between the first mounting surface 111 and the second mounting surface 211, thereby increasing the overall size of the most sealed structure of the battery pack. In the embodiment of the present utility model, the annular sealing gasket 3 is only arranged between the first mating surface 11 and the second mating surface 21, so that the first mounting surface 111 and the second mounting surface 211 can be tightly matched, thereby saving the space occupied by the battery pack sealing structure. At the same time, in the prior art, since bolts need to be installed at the joint of the first mounting surface 111 and the second mounting surface 211 for fixing, after the bolts are installed, the overall size of the joint of the first mounting surface 111 and the second mounting surface 211 will bulge outward. The edge of the box cover 2 is provided with a mounting portion 201 that is recessed toward the box body 1, and the second mounting surface 211 is located on the mounting portion 201, which can offset the outward bulge caused by the installation of the bolts to a certain extent, thereby reducing the overall external size of the battery pack sealing structure, so that the battery pack installation space can be effectively utilized. In this embodiment, mounting ears 7 can also be provided on both ends of the bottom plate 12, and the battery pack sealing structure is also provided on the mounting ears 7. The mounting ears 7 can play a certain positioning role on the battery cells 4 in the battery pack structure, thereby improving the stability of the battery pack structure.

[0035] Optionally, a mounting groove 112 is formed on the first mounting surface 111 , the first mating surface 11 is located at the bottom of the mounting groove 112 , and the annular sealing gasket 3 is disposed in the mounting groove 112 .

[0036] For example, Figure 7 As shown, it is a second embodiment of the utility model. By providing a mounting groove 112, the annular sealing gasket 3 can be placed in the mounting groove 112. When installing the annular sealing gasket 3, it is convenient for the operator to position and install it. Moreover, both side walls of the mounting groove 112 extend to the second mating surface 21, so that the annular sealing gasket 3 can be more stably arranged between the first mating surface 11 and the second mating surface 21, thereby improving the stability of the sealing structure of the battery pack.

[0037] Optionally, one side of the mounting groove 112 is in communication with an edge of the box body 1 .

[0038] For example, Figure 8 The third embodiment of the present invention is described above. Based on the second embodiment, the mounting groove 112 is opened close to the edge of the box body 1 to form a structure as shown in the figure. The structure of this embodiment is simpler to process and form than the second embodiment, and at the same time, some materials are omitted, thereby reducing the production cost of the sealing structure of the battery pack.

[0039] Optionally, the annular sealing gasket 3 is a rubber piece.

[0040] Illustratively, in the embodiment of the utility model, in addition to the most basic waterproof and dustproof functions, the rubber also has a certain elasticity. When the annular sealing gasket 3 is placed on the first mating surface 11 and the second mating surface 21, an interference fit is generally adopted. The thickness of the annular sealing gasket 3 is larger than the distance between the first mating surface 11 and the second mating surface 21. After the first mounting surface 111 and the second mounting surface 211 are installed, the annular sealing gasket 3 is tightly clamped, thereby improving the sealing performance of the sealing structure of the battery pack.

[0041] A battery pack structure includes the aforementioned battery pack sealing structure, and also includes a battery cell 4, wherein the box body 1 includes a bottom plate 12, and first limit blocks 13 are provided at both ends of the bottom plate 12, and the battery cell 4 is provided between the two first limit blocks 13. A second limit block 14 is provided between the two first limit blocks 13, and a limit groove 41 matching the second limit block 14 is provided at the bottom of the battery cell 4.

[0042] For example, in the embodiment of the present utility model, Figure 4As shown, by providing the first limiting blocks 13 at both ends of the bottom plate 12, when the battery cell 4 is installed in the closed space between the box body 1 and the box cover 2, the battery cell 4 can be limited at both ends, so that the battery cell 4 is stably installed in the closed space. By providing the first limiting blocks 13, the stability of the battery pack structure is improved. Figure 5 As shown, a second limiting block 14 is provided on the bottom plate 12, and a limiting groove 41 is provided at the bottom of the battery cell 4. When installing the battery cell 4, the two ends of the battery cell 4 can be limited by the first limiting block 13, and the position of the battery cell 4 can be further limited by the second limiting groove 14, so that the battery cell 4 is further stably installed on the bottom plate 12, thereby further improving the stability of the battery pack.

[0043] Optionally, a liquid cooling groove 5 is opened in the bottom plate 12 , and the liquid cooling groove 5 is arranged along the length direction of the bottom plate 12 .

[0044] Illustratively, in an embodiment of the utility model, by opening a liquid cooling tank 5 in the bottom plate 12, the liquid cooling tank 5 can be connected to an external cooling system, and coolant is introduced into the cooling tank 5, so that the battery pack structure can be cooled and the stability of the battery pack structure is increased.

[0045] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery pack sealing structure, characterized in that: include: Box body (1), box cover (2) and annular sealing gasket (3), The box cover (2) is arranged on the box body (1); the box body (1) has a first mating surface (11) and a first mounting surface (111) facing the same side; the box cover (2) has a second mating surface (21) opposite to the first mating surface (11) and a second mounting surface (211) opposite to the first mounting surface (111); the first mounting surface (111) and the second mounting surface (211) are in contact with and fixedly connected to each other; the first mating surface (11) and the second mating surface (21) are arranged at an interval; and the annular sealing gasket (3) is arranged around the box body (1) and clamped between the first mating surface (11) and the second mating surface (21).

2. A battery pack sealing structure according to claim 1, characterized in that: The first mounting surface (111) and the second mounting surface (211) are connected by bolts.

3. A battery pack sealing structure according to claim 2, characterized in that: A mating boss (101) is protruding from the first mounting surface (111), the first mating surface (11) is located on the mating boss (101), an edge of the box cover (2) is provided with a mounting portion (201) recessed toward the box body (1), and the second mounting surface (211) is located on the mounting portion (201).

4. A battery pack sealing structure according to claim 2, characterized in that: The first mounting surface (111) is provided with a mounting groove (112), the first matching surface (11) is located at the bottom of the mounting groove (112), and the annular sealing gasket (3) is arranged in the mounting groove (112).

5. A battery pack sealing structure according to claim 4, characterized in that: One side of the installation groove (112) is in communication with the edge of the box body (1).

6. A battery pack sealing structure according to claim 1, characterized in that: The annular sealing gasket (3) is a rubber piece.

7. A battery pack structure, comprising a battery pack sealing structure according to any one of claims 1 to 6, and also comprising a battery cell (4), the box body (1) comprising a bottom plate (12), first limit blocks (13) are arranged at both ends of the bottom plate (12), the battery cell (4) is arranged between two of the first limit blocks (13), a second limit block (14) is arranged between the two first limit blocks (13), and a limit groove (41) matching the second limit block (14) is arranged at the bottom of the battery cell (4).

8. A battery pack structure according to claim 7, characterized in that: A liquid cooling groove (5) is provided in the bottom plate (12), and the liquid cooling groove (5) is arranged along the length direction of the bottom plate (12).

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