Battery pack tray sealing structure, battery pack and vehicle

Abstract

The utility model discloses a battery pack tray sealing structure, a battery pack and a vehicle, the battery pack tray sealing structure comprises a sealing bracket, at least two first side walls are arranged on the sealing bracket at intervals, a first mounting part for mounting a connecting piece is arranged on each first side wall, the battery pack tray sealing structure also comprises a sealing piece, and the sealing piece is arranged between the connecting piece and the first mounting part in a sealing manner. The sealing part is arranged on the sealing bracket, so that the cavities on the two sides of the partition beam in the battery pack are effectively sealed, and high-temperature flue gas is prevented from being leaked into adjacent cavities when the battery cells in the cavities in the battery pack are heated to fail.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and particularly relates to a battery pack tray sealing structure, a battery pack and a vehicle. Background Art

[0002] In the prior art, the interior of a battery pack is divided into multiple cavities by partition beams. Electrochemical cells or electrical components are arranged in different cavities, and connections are required between the electrochemical cells and between the electrochemical cells and the electrical components. The arrangement of the connectors results in leakage gaps between different cavities. When one of the electrochemical cells fails due to heat, high-temperature flue gas is generated and leaks into other cavities through the gaps, affecting the performance of other electrochemical cells. Summary of the Utility Model

[0003] The utility model aims to solve the problem of leakage gaps existing between the cavities inside the battery pack in the prior art. For this purpose, the object of the utility model is to propose a battery pack tray sealing structure to solve the problems existing in the prior art.

[0004] To achieve the above object, an embodiment of one aspect of the utility model proposes a battery pack tray sealing structure, including: a sealing bracket, at least two first side walls are spacedly arranged on the sealing bracket, and a first mounting portion for mounting a connector is provided on the first side wall;

[0005] A seal, the seal is sealingly arranged between the connector and the first mounting portion.

[0006] According to the battery pack tray sealing structure of the embodiment of the utility model, the battery pack tray sealing structure is provided with a seal between the first mounting portion on the first side wall and the connector to seal the gap formed between the connector and the first mounting portion, so as to achieve effective sealing between different cavities.

[0007] According to some embodiments of the utility model, a receiving cavity is formed between the two first side walls, and a sealant is filled in the receiving cavity.

[0008] According to some embodiments of the utility model, the sealing bracket is provided with a second mounting portion, and the second mounting portion is used for connecting with the partition beam inside the tray.

[0009] According to some embodiments of the utility model, both of the two first side walls are formed with extending portions extending towards the partition beam inside the tray, a second side wall is formed between the extending portions, the second side wall is respectively connected with the two extending portions, and the two extending portions and the second side wall form the second mounting portion.

[0010] According to some embodiments of the utility model, the sealing bracket further includes a third mounting portion, and the third mounting portion is used for connecting with the partition beam inside the tray or the side beam of the tray.

[0011] According to some embodiments of the present utility model, the third installation part includes a third side wall, and the first side wall, the second side wall and the third side wall enclose the accommodation cavity.

[0012] According to some embodiments of the present utility model, the first side wall includes a first plate and a second plate, the seal is sealingly arranged between the first plate, the second plate and the connecting piece, and a spacing cavity is formed between the first plate and the second plate.

[0013] According to some embodiments of the present utility model, it further includes a sealing upper cover, and the sealing upper cover is used to cover the accommodation cavity.

[0014] Another embodiment of the present utility model provides a battery pack, including the above-mentioned battery pack tray sealing structure.

[0015] Another embodiment of the present utility model provides a vehicle, including the above-mentioned battery pack.

[0016] The above-mentioned utility model solution provides a structure with a battery pack tray structure. By arranging a first installation part on the sealing bracket and a seal between the connecting piece and the first installation part, effective sealing of the end of the partition beam inside the battery pack by the sealing bracket is achieved, so that the adjacent cavities for accommodating battery cells or electrical components inside the battery pack can be effectively isolated, avoiding leakage to other cavities when high-temperature flue gas is generated by one of the battery cells. Description of the Drawings

[0017] Figure 1 is a schematic diagram of a battery pack tray sealing structure according to an embodiment of the present utility model;

[0018] Figure 2 is an exploded view of a battery pack tray sealing structure according to an embodiment of the present utility model;

[0019] Figure 3 is an installation schematic diagram of a battery pack tray sealing structure according to an embodiment of the present utility model.

[0020] Reference Signs:

[0021] 1 - Sealing bracket; 11 - First side wall; 111 - First installation part; 112 - First plate; 113 - Second plate; 114 - Spacing cavity; 12 - Second installation part; 121 - Extension part; 122 - Second side wall; 13 - Third installation part; 131 - Third side wall; 2 - Connecting piece; 21 - Flange; 3 - Seal; 4 - Accommodation cavity; 5 - Sealing glue; 6 - Inner partition beam of the tray; 7 - Side beam of the tray; 8 - Sealing upper cover. Detailed Embodiments

[0022] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model.

[0023] Next, a battery pack tray sealing structure proposed by an embodiment of the present utility model will be described with reference to the accompanying drawings.

[0024] As Figure 1 shown, according to some embodiments of the present utility model, it includes a sealing bracket 1, at least two first side walls 11 are spaced on the sealing bracket 1, a first mounting portion 111 for mounting a connecting member 2 is provided on the first side wall 11, and it further includes a sealing member 3, and the sealing member 3 is sealingly arranged between the connecting member 2 and the first mounting portion 111.

[0025] Specifically, the first mounting portion 111 is arranged as a groove extending in the up and down direction of the first side wall 11, and the first mounting portion 111 is provided on both of the two first side walls 11. The connecting member 2 is arranged to pass through the two first side walls 11 through the groove in the direction perpendicular to the first side wall 11, and the connecting member 2 is used to connect the battery cells or electrical components in two adjacent cavities inside the battery pack. A sealing member 3 is arranged between the connecting member 2 and the first mounting portion 111, and the sealing member 3 can be arranged to be sleeved on the connecting member 2, and then the connecting member 2 together with the sealing member 3 is installed into the first mounting portion 111. The sealing member 3 is made of silica gel material, and the sealing member 3 is further provided with a flange 21 perpendicular to the connecting member 2, and the flange 21 is arranged on both sides of the connecting member 2 and the flange 21 fits with the first side wall 11. The flange 21 of the connecting member 2 can fit with any position on both sides of the first side wall 11 as long as it can seal the gap between the connecting member 2 and the first side wall 11. As Figure 2 shown, the connecting member 2 uses copper-aluminum composite connection, and is provided with a copper busbar and an aluminum busbar, and the copper busbar and the aluminum busbar are connected together by metal ultrasonic welding, without designing a transfer connection point in the middle, which can make the layout of the battery pack more compact and save space. In some other embodiments, the connecting member 2 can be arranged as any other material and structure that can connect the battery cells or electrical components. The connecting member 2 is designed to be insulated from the sealing bracket 1, so an insulating protective layer can be added to the connecting member 2, such as a mica winding layer, a thermally pressed PI, a heat shrinkable sleeve, etc.

[0026] Optionally, the sealing bracket 1 is made of plastic material, and mica is covered on the surface of the sealing bracket 1 to enhance the insulation and fire resistance of the sealing bracket 1.

[0027] In some other embodiments, the connecting member 2 can be set to any shape as long as it can connect the battery cells or electrical components between adjacent cavities. The shape of the first mounting portion 111 and the shape of the seal 3 can change following the shape of the connecting member 2 as long as the seal 3 can function as a seal.

[0028] As Figure 1 and Figure 2 shown, according to some embodiments of the present utility model, a receiving cavity 4 is formed between two first side walls 11, and a sealant 5 is filled in the receiving cavity 4.

[0029] Specifically, there may be gaps between the seal 3 and the connecting member 2, and between the seal 3 and the first side wall 11 due to long-term use, reducing the sealing effect. To further enhance the sealing effect inside the sealing bracket 1, the sealant 5 is filled between the two first side walls 11. The sealant 5 can be a structural adhesive, and the structural adhesive can be evenly filled between the two first side walls 11. By filling the sealant 5 between the two first side walls 11, the sealing effect between the connecting member 2 and the sealing bracket 1 is further enhanced.

[0030] As Figure 1 and Figure 3 shown, according to some embodiments of the present utility model, the sealing bracket 1 is provided with a second mounting portion 12 for connecting with the partition beam 6 inside the tray.

[0031] Specifically, the internal cavity of the tray is separated by the partition beam 6 inside the tray. The sealing bracket 1 is disposed at one end of the partition beam 6 inside the tray, and the sealing bracket 1 is connected to the partition beam 6 inside the tray through the second mounting portion 12. The second mounting portion 12 and the partition beam 6 inside the tray can be bonded with a structural adhesive, which can not only ensure the effective connection between the sealing bracket 1 and the partition beam 6 inside the tray, but also the structural adhesive can be fully filled between the sealing bracket 1 and the partition beam 6 inside the tray to play an effective sealing role. By providing the second mounting portion 12, the sealing bracket 1 is stably mounted at one end of the partition beam 6 inside the tray.

[0032] As Figure 1 shown, according to some embodiments of the present utility model, both of the two first side walls 11 are formed with extension portions 121 extending towards the partition beam 6 inside the tray. A second side wall 122 is formed between the extension portions 121. The second side wall 122 is respectively connected to the two extension portions 121, and the two extension portions 121 and the second side wall 122 form the second mounting portion 12.

[0033] Specifically, the two extension parts 121 and the second side wall 122 are integrally connected to form the second mounting part 12. The Z-direction cross-section of the second mounting part 12 forms a U-shaped structure. One end of the partition beam 6 inside the tray matches the U-shaped second mounting part 12. The side surfaces of the extension part 121 and the partition beam 6 inside the tray are in contact, and the end surfaces of the second side wall 122 and the partition beam 6 inside the tray are in contact. The contact surfaces between the extension part 121 and the side of the partition beam are bonded with structural adhesive, and the contact surfaces between the second side wall 122 and the end surface of the partition beam 6 inside the tray are bonded with structural adhesive. In some other embodiments, the second mounting part 12 can also be connected by other means such as welding, as long as the sealing bracket 1 and the partition beam 6 inside the tray can be effectively connected without leakage gaps. The specific connection method is not limited here. By setting the second connecting part into a U-shaped structure, the partition beam 6 inside the tray and the second connecting part can be better matched and in contact, avoiding problems such as unstable connection and leakage gaps caused by poor matching.

[0034] As Figure 1 and Figure 3 shown, according to some embodiments of the present invention, the sealing bracket 1 further includes a third mounting part 13, and the third mounting part 13 is used to connect with the partition beam 6 inside the tray or the tray side beam 7.

[0035] Specifically, the sealing bracket 1 can be arranged at the intersection of the partition beams 6 inside the tray that are perpendicular to each other. At this time, the third mounting part 13 is connected to the partition beam 6 inside the tray. The sealing bracket 1 can also be arranged at the intersection of the partition beam 6 inside the tray and the tray side beam 7 that are perpendicular to each other. At this time, the third mounting part 13 is connected to the tray side beam 7. The third mounting part 13 and the partition beam 6 inside the tray or the tray side beam 7 can be bonded by filling structural adhesive to ensure the sealing between the third mounting part 13 and the partition beam 6 inside the tray or the side beam. The specific connection method between the third mounting part 13 and the partition beam 6 inside the tray or the tray side beam 7 is not limited, as long as the connection is firm and there are no leakage gaps.

[0036] As Figure 1 and Figure 2 shown, according to some embodiments of the present invention, the third mounting part 13 includes a third side wall 131, and the first side wall 11, the second side wall 122 and the third side wall 131 enclose a receiving cavity 4.

[0037] According to some embodiments of the present invention, the third mounting part 13 is provided with a third side wall 131 perpendicular to the first side wall 11, and both ends of the two first side walls 11 close to the third mounting part 13 are connected to the third mounting part 13.

[0038] Specifically, the side walls of the partition beam 6 or the side beam 7 in the tray are usually set as flat surfaces. In order to better connect the third mounting portion 13 to the partition beam 6 or the side beam 7 in the tray, the third mounting portion 13 is provided with a third side wall 131 of a flat surface structure, and the third mounting portion 13 is set to be perpendicular to the first side wall 11. The accommodation cavity 4 includes not only two first side walls 11, but also a second side wall 122 and a third side wall 131. Through the connection of the first side wall 11, the second side wall 122 and the third side wall 131, an accommodation cavity 4 surrounded by four sides is formed, and the sealant 5 can be evenly filled into the accommodation cavity 4 to effectively seal the leakage gap between the connecting member 2 and the first side wall 11.

[0039] As Figure 1 shown, according to some embodiments of the present invention, the first side wall 11 includes a first plate 112 and a second plate 113, and the seal 3 is hermetically arranged between the first plate 112, the second plate 113 and the connecting member 2, and an interval cavity 114 is formed between the first plate 112 and the second plate 113.

[0040] Specifically, the seal 3 is installed in the first mounting portion 111 provided on the first side wall 11. The larger the contact area between the seal 3 and the first mounting portion 111, the better the sealing effect of the seal 3. In order to increase the sealing effect between the seal 3 and the first mounting portion 111, the thickness of the first side wall 11 is increased. For light weight and reduced processing difficulty, the first side wall 11 is set to be formed by connecting the first plate 112 and the second plate 113. At this time, an interval cavity 114 is formed between the first plate 112 and the second plate 113. When it is necessary to further increase the thickness of the first side wall 11, only the interval distance between the first plate 112 and the second plate 113 needs to be increased.

[0041] As Figure 2 shown, according to some embodiments of the present invention, a sealing upper cover 8 is further included. The sealing upper cover 8 is used to cover the accommodation cavity 4, and the sealing upper cover 8 is set to be connected to the second side wall 122 and the third side wall 131.

[0042] Specifically, in addition to the leakage gap between the connecting member 2 and the first side wall 11, there is also a leakage gap between the sealing bracket 1 and the battery pack top cover. By providing the sealing upper cover 8 to cover the first accommodating cavity 4, and further covering the battery pack top cover on the battery pack tray, the sealing upper cover 8 can produce a sealing effect between the sealing bracket 1 and the battery pack top cover. In some other embodiments, mounting holes for mounting the sealing upper cover 8 are provided on the second side wall 122 and the third side wall 131, and mounting buckles are provided at positions corresponding to the mounting holes on the sealing upper cover 8. The mounting buckles are connected in cooperation with the mounting holes, so that the sealing upper cover 8 can be effectively fixed. In order to better mount the sealing upper cover 8 to the top of the first accommodating cavity 4, the heights of the second side wall 122 and the third side wall 131 are both set higher than those of the two first side walls 11. At this time, the sealing upper cover 8 can be connected to the second side wall 122 and the third side wall 131 and completely cover the first accommodating cavity 4.

[0043] In some other embodiments, the sealing upper cover 8 is covered with a layer of glue, which can be structural glue or other glue that can be used for sealing. When the battery pack top cover is mounted on the battery pack tray, the glue-coated sealing upper cover can be bonded to the battery pack top cover, increasing the sealing performance between the sealing upper cover 8 and the battery pack top cover.

[0044] Another embodiment of the present invention provides a battery pack, including the above-mentioned battery pack tray sealing structure.

[0045] Another embodiment of the present invention provides a vehicle, including the above-mentioned battery pack.

[0046] The above-mentioned battery pack tray sealing structure can be applied between two cavities in the battery pack tray. By providing a sealing member, an effective seal is formed between the connecting member and the sealing bracket, so as to effectively seal between the two cavities in the battery pack tray, preventing the high-temperature flue gas generated by the battery cells in a certain cavity inside the battery pack from diffusing into other cavities and increasing the safety of the battery pack.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0048] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0051] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A battery pack tray sealing structure, characterized in that: include: A sealing bracket (1), wherein at least two first side walls (11) are arranged at intervals on the sealing bracket (1), and a first mounting portion (111) for mounting a connecting member (2) is provided on the first side wall (11); A sealing member (3), wherein the sealing member (3) is sealingly disposed between the connecting member (2) and the first mounting portion (111).

2. The battery pack tray sealing structure according to claim 1, characterized in that: A receiving cavity (4) is formed between the two first side walls (11), and the receiving cavity (4) is filled with a sealant (5).

3. The battery pack tray sealing structure according to claim 1, characterized in that: The sealing bracket (1) is provided with a second mounting portion (12), and the second mounting portion (12) is used to be connected to a partition beam (6) inside the pallet.

4. The battery pack tray sealing structure according to claim 3, characterized in that: The two first side walls (11) are each formed with an extension portion (121) extending toward the partition beam (6) in the tray, a second side wall (122) is formed between the extension portions (121), the second side wall (122) is respectively connected to the two extension portions (121), and the two extension portions (121) and the second side wall (122) form the second mounting portion (12).

5. The battery pack tray sealing structure according to claim 4, characterized in that: The sealing bracket (1) further comprises a third mounting portion (13), wherein the third mounting portion (13) is used to be connected to a partition beam (6) inside the pallet or a side beam (7) of the pallet.

6. The battery pack tray sealing structure according to claim 5, characterized in that: An accommodating cavity (4) is formed between the two first side walls (11); the third mounting portion (13) comprises a third side wall (131); and the first side wall (11), the second side wall (122) and the third side wall (131) enclose the accommodating cavity (4).

7. The battery pack tray sealing structure according to claim 6, characterized in that: The first side wall (11) comprises a first plate (112) and a second plate (113); the sealing member (3) is sealingly arranged between the first plate (112), the second plate (113) and the connecting member (2); and a partition cavity (114) is formed between the first plate (112) and the second plate (113).

8. The battery pack tray sealing structure according to claim 7, characterized in that: It also comprises a sealing upper cover (8), wherein the sealing upper cover (8) is used to cover the accommodating cavity (4).

9. A battery pack, characterized in that: Comprising a battery pack tray sealing structure as described in any one of claims 1-8.

10. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 9.

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