Battery box body

Abstract

The utility model discloses a battery box body, which comprises a cover body, a liquid cooling plate, a first sealing element and a fastening assembly, the cover body comprises a top plate and a side plate, the liquid cooling plate and the cover body are mutually connected to jointly define a closed space for accommodating a battery, the liquid cooling plate is provided with a groove, at least part of the side plate is arranged in the groove, and the fastening assembly is arranged in the groove. The first sealing piece is arranged in the groove and located between the side face of the groove and the side plate, and the fastening assembly is used for connecting the side face of the groove and the side plate. The battery box body disclosed by the embodiment of the utility model has the advantages of good sealing performance and high structural strength.

Description

Technical Field

[0001] The utility model relates to the technical field of battery design, and in particular to a battery box. Background Art

[0002] As the research and application of electric vehicles are gaining more and more attention, users have higher and higher requirements for the safety performance and use of power batteries. The power battery pack is generally composed of a box and a battery. The battery is encapsulated in the box. The box includes an upper cover and a bottom box. The upper cover is buckled on the bottom box and connected by bolts. Foamed silicone is set between the upper cover and the bottom box for sealing. However, the sealing effect of this sealing method is poor. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a battery box, which has the advantages of good sealing and high structural strength.

[0004] The battery box of the utility model embodiment includes:

[0005] A cover body, the cover body comprising a top plate and side plates;

[0006] A liquid cooling plate, wherein the liquid cooling plate and the cover body are connected to each other to jointly enclose a closed space for accommodating the battery, the liquid cooling plate has a groove, and at least a portion of the side plate is disposed in the groove;

[0007] a first sealing member, the first sealing member being disposed in the groove and between a side surface of the groove and the side plate;

[0008] A fastening assembly is used to connect the side surface of the groove and the side plate.

[0009] In the battery case of the utility model embodiment, at least a portion of the side panel is inserted into the groove and the first seal is squeezed together with the side surface of the groove, so as to ensure a reliable seal between the side panel and the liquid cooling plate through the first seal, improve the sealing between the cover body and the liquid cooling plate, and the side panel and the liquid cooling plate are connected by a fastening assembly, which improves the connectivity between the side panel and the liquid cooling plate and ensures the sealing of the first seal and the structural strength of the battery case.

[0010] In some embodiments, the fastening assembly includes a nut column and a fastener, the nut column is arranged on the inner side of the side plate, and the fastener passes through the side surface of the groove and is fastened to the nut column.

[0011] In some embodiments, openings are formed at both ends of the cover body, and the cover body further includes an end plate, and the end plates are two, and the two end plates correspond to the two openings one by one and are used to close the openings, and the end plates are connected to the liquid cooling plate.

[0012] The battery case further includes a second sealing member disposed between the end plate and the opening and extending around a circumference of the opening.

[0013] In some embodiments, the end plate includes an end wall and an extension wall, wherein the extension wall is arranged on the inner side of the end wall and extends circumferentially around the end wall, the extension wall is not closed, and the inner wall surface of the extension wall has a mounting groove, the mounting groove extends along the extension direction of the extension wall, and the second sealing member is arranged in the mounting groove and extends along the extension direction of the mounting groove.

[0014] In some embodiments, the battery case also includes a bending section, which is arranged at the opening, extending along the extension direction of the cover body and inclined toward the central axis of the opening, the cross-sectional area of ​​the bending section is smaller than the cross-sectional area of ​​the extension wall, and the bending section extends into the extension wall to press the second seal.

[0015] In some embodiments, the bending section is connected to the extension wall through the fastening assembly, the nut column is provided on the inner side of the bending section, at least part of the nut column passes through the bending section and extends into the second sealing member, an opening is provided on the extension wall, the fastener is passed through the opening, and the fastener passes through the opening and the second sealing member in turn and is connected to the nut column.

[0016] In some embodiments, a length of the nut column extending into the second seal is less than a thickness of the second seal.

[0017] In some embodiments, the extension wall extends in a direction away from the end wall, at least a portion of one end of the extension wall away from the end wall is inclined toward a central axis of the end wall, and at least a portion of one end of the extension wall is in contact with at least a portion of the bending section.

[0018] In some embodiments, the end wall and the extension wall are integrally formed.

[0019] In some embodiments, the nut column is a rivet nut, the fastener is a screw, and the fastener is threadedly matched with the nut column. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of a battery box according to an embodiment of the present utility model.

[0021] Figure 2 It is a partial cross-sectional schematic diagram of a battery box according to an embodiment of the utility model.

[0022] Figure 3 yes Figure 1Enlarged schematic diagram of part A.

[0023] Figure 4 It is a partial cross-sectional schematic diagram of a battery box according to an embodiment of the utility model.

[0024] Figure numerals: 1. cover body; 11. top plate; 12. side plate; 13. installation chamber; 2. liquid cooling plate; 21. groove; 22. perforation; 3. first seal; 4. fastening assembly; 41. nut column; 42. fastener; 5. end plate; 51. side wall; 52. extension wall; 521. first section; 522. second section; 523. installation groove; 6. second seal; 7. bending section; 71. first transition section; 72. first straight section; 73. second transition section; 74. second straight section; 8. installation space. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0026] like Figure 1-Figure 4 As shown, the battery box of the embodiment of the utility model includes a cover body 1, a liquid cooling plate 2, a first sealing member 3 and a fastening assembly 4. The cover body 1 includes a top plate 11 and a side plate 12. The liquid cooling plate 2 and the cover body 1 are connected to each other to jointly enclose a closed space for accommodating batteries, and the liquid cooling plate 2 has a groove 21, and at least a portion of the side plate 12 is disposed in the groove 21.

[0027] Specifically, the liquid cooling plate 2 extends along the first direction, and there are two grooves 21, which are respectively arranged on both sides of the liquid cooling plate 2 along the width direction of the liquid cooling plate 2 and extend along the first direction. The first seal 3 is arranged in the groove 21 and extends along the extension direction of the groove 21. The first seal 3 is located between the side of the groove 21 and the side plate 12, and the width direction of the liquid cooling plate 2 is orthogonal to the first direction. The first seal 3 is laid on the inner wall surface of the groove 21, and at least part of the side plate 12 and the inner wall surface of the groove 21 are pressed against the first seal 3.

[0028] Specifically, the top plate 11 is rectangular and extends along the first direction, and there are two side plates 12, and the two side plates 12 correspond to the two grooves 21 one by one. The two side plates 12 are respectively arranged on both sides of the top plate 11 and extend along the first direction. The upper ends of the side plates 12 are connected to the top plate 11, and the lower ends of the side plates 12 are inserted into the grooves 21. There is an angle between the side plates 12 and the top plate 11, and the angle is 90°. The cross section of the cover body 1 is U-shaped with the opening facing downward. An installation chamber 13 is formed between the lower end of the side plate 12 and one side of the groove 21, and the first sealing member 3 is arranged in the installation chamber 13.

[0029] The fastening assembly 4 is used to connect the side of the groove 21 and the side plate 12. The fastening assembly 4 includes a nut column 41 and a fastener 42. The nut column 41 is arranged on the inner side of the side plate 12 and penetrates the side plate 12. A through hole 22 is provided on the side of the liquid cooling plate 2 and is connected to the groove 21. The fastener 42 passes through the through hole 22 and is fastened to the nut column 41. Specifically, a through hole (not shown) is provided at the lower end of the side plate 12, and one end of the nut column 41 extends out of the through hole. The nut column 41 is a pressure rivet nut, and the fastener 42 is a screw. The fastener 42 is threadedly matched with the nut column 41. The matching method of the nut column 41 and the fastener 42 is simple and effective.

[0030] During installation, the lower end of the side plate 12 is inserted into the groove 21, the first seal 3 is located between the outer wall surface of the lower end of the side plate 12 and one side surface of the groove 21, one end of the nut column 41 extends out of the through hole and corresponds to the through hole 22, and the fastener 42 passes through the through hole 22 and the first seal 3 and is fastened to the nut column 41 to connect the cover body 1 with the liquid cooling plate 2 and squeeze the first seal 3.

[0031] Specifically, there are multiple fastening assemblies 4 between the side plate 12 and the liquid cooling plate 2, and the multiple fastening assemblies 4 are divided into two groups. The two groups of fastening assemblies 4 correspond to the two grooves 21 one by one, each group includes multiple fastening assemblies 4, and the multiple fastening assemblies 4 in each group are arranged at intervals along the first direction.

[0032] In the battery case of the embodiment of the utility model, at least part of the side plate 12 is inserted into the groove 21 and the first seal 3 is pressed together with the groove 21, so as to ensure reliable sealing between the side plate 12 and the liquid cooling plate 2 through the first seal 3, and improve the sealing between the cover 1 and the liquid cooling plate 2. The side plate 12 and the liquid cooling plate 2 are connected by the fastening assembly 4, which improves the connectivity between the side plate 12 and the liquid cooling plate 2, ensures the sealing of the first seal 3 and the structural strength of the battery case.

[0033] In some embodiments, the first seal 3 is laid on the bottom surface of the groove 21, and at least a portion of the cover body 1 squeezes the top surface of the first seal 3, so that both sides of the first seal 3 can overflow upward along the cover body 1, so that at least a portion of the first seal 3 located on the inner side of the side plate 12 can be filled between one side surface of the groove 21 and the inner wall surface of the side plate 12, and at least a portion of the first seal 3 located on the outer side of the side plate 12 can be filled between the other side surface of the groove 21 and the outer wall surface of the side plate 12, thereby ensuring the sealing between the side plate 12 and the liquid cooling plate 2.

[0034] In some embodiments, openings (not shown) are formed at both ends of the cover body 1. The cover body also includes an end plate 5. There are two end plates 5, and the two end plates 5 correspond to the two openings one by one to close the openings, and the end plates 5 are connected to the liquid cooling plate. Specifically, the end plates 5 are rectangular and fit the openings, and the lower ends of the end plates 5 are connected to the liquid cooling plate 2. A sealing gasket (not shown) is provided between the end plates 5 and the liquid cooling plate 2 to ensure the sealing of the battery box.

[0035] In some embodiments, the battery case further includes a second seal 6 , which is disposed between the end plate 5 and the opening and extends around the circumference of the opening. The end plate 5 and the cover body 1 are connected via a fastening assembly 4 .

[0036] In some embodiments, the end plate 5 includes an end wall 51 and an extension wall 52, wherein the extension wall 52 is disposed on the inner side of the end wall 51 and extends around the circumference of the end wall 51, and the extension wall 52 is not closed. The inner wall surface of the extension wall 52 has a mounting groove 523, and the mounting groove 523 extends along the extension direction of the extension wall 52. The second sealing member 6 is disposed in the mounting groove 523 and extends along the extension direction of the mounting groove 523. Specifically, the extension wall 52 is not closed at the lower end of the end wall 51, and the cross section of the extension wall 52 is U-shaped with the opening downward. The end wall 51 and the extension wall 52 are integrally formed, which ensures the continuity and integrity of the structure of the end plate 5.

[0037] Specifically, the extension wall 52 includes a first section 521 and a second section 522. One end of the first section 521 is fixedly connected to the inner side of the end wall 51, and the other end of the first section 521 extends in a direction away from the end wall 51. The angle between the first section 521 and the end wall 51 is preferably 90°. The mounting groove 523 is provided on the inner wall surface of the first section 521 and extends along the extension direction of the first section 521. One end of the second section 522 is fixedly connected to the other end of the first section 521, and the other end of the second section 522 extends in a direction away from the first section 521. The second section 522 and the first section 521 are integrally formed. The cross-sectional area enclosed by the second section 522 is smaller than the cross-sectional area enclosed by the first section 521.

[0038] In some embodiments, the battery case also includes a bending section 7, which is arranged at the opening. The bending section 7 extends along the extension direction of the cover body 1 and is inclined toward the central axis of the opening. The cross-sectional area of ​​the bending section 7 is smaller than the cross-sectional area of ​​the extension wall 52. The bending section 7 extends into the extension wall 52 to press the second seal 6.

[0039] Specifically, the bending section 7 includes a first transition section 71, a first straight section 72, a second transition section 73, and a second straight section 74 connected in sequence. One end of the first transition section 71 is connected to the end of the cover body 1, and the other end of the first transition section 71 extends in a direction away from the cover body 1 and is inclined toward the central axis of the opening. One end of the second transition section 73 is connected to an end of the first straight section 72 away from the first transition section 71, and the other end of the second transition section 73 extends in a direction away from the cover body 1 and is inclined toward the central axis of the opening. The cross-sectional area enclosed by the first straight section 72 is larger than the cross-sectional area enclosed by the second straight section 74.

[0040] The cross-sectional area enclosed by the second section 522 is larger than the cross-sectional area enclosed by the first straight section 72. When the extension wall 52 and the bent section 7 are connected, the bent section 7 extends into the extension wall 52, the second straight section 74 corresponds to the first section 521, and an installation space 8 is formed between the second straight section 74 and the first section 521. The second sealing member 6 is disposed in the installation groove 523, and at least a portion of the second sealing member 6 extends out of the installation groove 523 and is located in the installation space 8. The first straight section 72 corresponds to the second section 522, and the first straight section 72 and the second section 522 are in contact with each other.

[0041] In some embodiments, the bending section 7 is connected to the extension wall 52 through the fastening assembly 4. A nut column 41 is provided on the inner side of the bending section 7, at least part of the nut column 41 passes through the bending section 7 and extends into the second sealing member 6, an opening (not shown) is provided on the extension wall 52, a fastener 42 is passed through the opening, and the fastener 42 passes through the opening and the second sealing member 6 in sequence and is connected to the nut column 41.

[0042] Specifically, a plurality of fastening assemblies 4 are also provided between the extension wall 52 and the bending section 7, and the plurality of fastening assemblies 4 are arranged at intervals along the extension direction of the extension wall 52. The nut column 41 is provided at the inner side of the second straight section 74, and at least a portion of the nut column 41 passes through the second straight section 74, is located in the installation space 8, and extends into the second sealing member 6. The opening is located on the first section 521, and there are a plurality of openings, which are arranged at intervals along the extension direction of the first section 521. The fastener 42 passes through the opening and the second sealing member 6 and is threadedly matched with the nut column 41 to achieve the connection between the first section 521 and the second straight section 74.

[0043] In some embodiments, the length of the bent section 7 extending into the second seal 6 is less than the thickness of the second seal 6, so that when the first section 521 and the second straight section 74 squeeze the second seal 6, it is possible to avoid excessive pressure between the first section 521 and the second straight section 74, which may damage the second seal 6 and prevent the failure of the second seal 6. The arrangement of the first straight section 72 and the second section 522 can also prevent excessive pressure between the first section 521 and the second straight section 74, which may damage the second seal 6.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery box, characterized in that: include: A cover body (1), the cover body (1) comprising a top plate (11) and a side plate (12); A liquid cooling plate (2), the liquid cooling plate (2) and the cover body (1) being connected to each other to jointly enclose a closed space for accommodating a battery, the liquid cooling plate (2) having a groove (21), and at least a portion of the side plate (12) being arranged in the groove (21); A first sealing member (3), the first sealing member (3) being arranged in the groove (21) and located between a side surface of the groove (21) and the side plate (12); A fastening assembly (4), the fastening assembly (4) being used to connect the side surface of the groove (21) and the side plate (12).

2. The battery box according to claim 1, characterized in that: The fastening assembly (4) comprises a nut column (41) and a fastener (42); the nut column (41) is arranged on the inner side of the side plate (12); and the fastener (42) passes through the side surface of the groove (21) and is fastened to the nut column (41).

3. The battery box according to claim 2, characterized in that: Openings are formed at both ends of the cover body (1), and the cover body (1) further comprises an end plate (5). There are two end plates (5), and the two end plates (5) correspond to the two openings one by one and are used to close the openings. The end plates (5) are connected to the liquid cooling plate (2). The battery case further comprises a second sealing member (6), which is arranged between the end plate (5) and the opening and extends around the circumference of the opening.

4. The battery box according to claim 3, characterized in that: The end plate (5) comprises an end wall (51) and an extension wall (52), wherein the extension wall (52) is arranged on the inner side of the end wall (51) and extends circumferentially around the end wall (51), the extension wall (52) is not closed, and the inner wall surface of the extension wall (52) has a mounting groove (523), and the mounting groove (523) extends along the extension direction of the extension wall (52), and the second sealing member (6) is arranged in the mounting groove (523) and extends along the extension direction of the mounting groove (523).

5. The battery box according to claim 4, characterized in that: It also includes a bending section (7), which is arranged at the opening, and extends along the extension direction of the cover body (1) and is inclined toward the central axis of the opening. The cross-sectional area of ​​the bending section (7) is smaller than the cross-sectional area of ​​the extension wall (52). The bending section (7) extends into the extension wall (52) to press the second sealing member (6).

6. The battery case according to claim 5, characterized in that: The bending section (7) is connected to the extension wall (52) through the fastening assembly (4); the inner side of the bending section (7) is provided with the nut column (41); at least part of the nut column (41) passes through the bending section (7) and extends into the second sealing member (6); an opening is provided on the extension wall (52); the fastener (42) is inserted into the opening; the fastener (42) passes through the opening and the second sealing member (6) in sequence and is connected to the nut column (41).

7. The battery case according to claim 6, characterized in that: The length of the nut column (41) extending into the second sealing member (6) is less than the thickness of the second sealing member (6).

8. The battery box according to claim 5, characterized in that: The extension wall (52) extends in a direction away from the end wall (51), and at least a portion of one end of the extension wall (52) away from the end wall (51) is inclined toward the central axis of the end wall (51), and at least a portion of one end of the extension wall (52) is in contact with at least a portion of the bending section (7).

9. The battery case according to claim 4, characterized in that: The end wall (51) and the extension wall (52) are integrally formed.

10. The battery case according to claim 2, characterized in that: The nut column (41) is a pressure rivet nut, the fastener (42) is a screw, and the fastener (42) is threadedly matched with the nut column (41).

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