Vehicle battery pack mounting structure

Abstract

The present invention comprises: a coupling bolt that penetrates a battery pack and is coupled to a vehicle body; a mounting bush formed to receive the coupling bolt inside and penetrate the battery pack, and to maintain a constant gap between the lower case and the upper cover of the battery pack even when the fastening force of the coupling bolt is applied; a lower fixing nut that fixes the lower side of the mounting bush to the lower case; an upper fixing nut that fixes the upper side of the mounting bush to the upper cover; a lower sealing member installed so that sealing between the mounting bush and the lower case is achieved by fastening the lower fixing nut to the mounting bush; an upper sealing member installed so that sealing between the mounting bush and the upper cover is achieved by fastening the upper fixing nut to the mounting bush; and a vehicle body side sealing member installed so that sealing between the upper fixing nut and the vehicle body is achieved by fastening the coupling bolt to the vehicle body.

Description

Technology Field

[0001] The present invention relates to a structure for mounting a battery in a vehicle. Background Technology

[0003] Electric vehicles and the like are equipped with a battery pack to supply power necessary for driving the vehicle, and the battery pack accommodates a plurality of battery modules, and the battery modules consist of a plurality of battery cells.

[0004] The above battery pack is often mounted on the underside of the vehicle body, and in this case, not only must the battery pack be securely mounted to the vehicle body, but the battery pack is also required to have sealing performance to prevent moisture or foreign substances from penetrating into the battery pack.

[0005] In particular, vehicles are often subjected to unexpected external impacts, and it is desirable for the battery pack to provide stable sealing performance against such external impacts.

[0007] The matters described as the background technology of the above invention are intended only to enhance understanding of the background of the invention and should not be construed as an acknowledgment that they constitute prior art already known to those skilled in the art. Prior art literature

[0008] (Patent Document 0001) KR 1020210001334 A The problem to be solved

[0009] The purpose of the present invention is to provide a battery pack mounting structure for a vehicle that can significantly improve the durability and stability of the battery pack by enabling the battery pack to be securely mounted to the lower part of the vehicle body and by maintaining stable sealing performance to prevent moisture or foreign substances from penetrating into the interior of the battery pack even under external impacts. means of solving the problem

[0011] The battery pack mounting structure of the vehicle according to the present invention for achieving the above-mentioned purpose is,

[0012] A connecting bolt that penetrates the battery pack and connects to the vehicle body;

[0013] A mounting bushing formed to accommodate the coupling bolt on the inside and to penetrate and connect the battery pack, and to maintain a constant gap between the lower case and the upper cover of the battery pack even when the fastening force of the coupling bolt is applied;

[0014] A lower fixing nut that fixes the lower side of the above mounting bushing to the lower case;

[0015] An upper fixing nut that fixes the upper side of the above mounting bush to the upper cover;

[0016] A lower sealing member installed such that sealing between the mounting bush and the lower case is achieved by fastening the lower fixing nut to the mounting bush;

[0017] An upper sealing member installed such that sealing between the mounting bush and the upper cover is achieved by fastening the upper fixing nut to the mounting bush;

[0018] A body-side sealing member installed such that sealing between the upper fixing nut and the vehicle body is achieved by fastening the above-mentioned coupling bolt to the vehicle body;

[0019] It is characterized by being composed including

[0021] The above mounting bush

[0022] A column portion having a hollow column shape located between the lower case and the upper cover and perpendicular to the lower case and the upper case;

[0023] A lower fixing part extending downward from the bottom of the column part and penetrating the lower case, to which the lower fixing nut is fastened;

[0024] An upper fixing part extending upward from the top of the column portion and penetrating the upper cover, to which the upper fixing nut is fastened;

[0025] It can be configured to include.

[0027] The above mounting bush

[0028] A flange portion extending radially outward from the bottom of the column portion and facing the upper surface of the lower case at the opposite side of the lower fixing nut centered on the lower case may be provided, so that when the lower fixing nut is fastened to the lower fixing portion, the flange portion and the lower fixing nut press the lower case from both sides.

[0030] A lower sealing member that is compressed between the flange portion and the lower case can be mounted on the flange portion of the mounting bushing by fastening the lower fixing nut to the lower fixing portion.

[0032] The lower fixing portion of the above mounting bushing may be formed with a diameter larger than the inner diameter of the column portion, so that the head portion of the coupling bolt is received inside the lower fixing portion.

[0034] The outer diameter of the upper fixing part of the above mounting bushing is formed to be smaller than the outer diameter of the column part, so that the upper fixing nut and the upper end of the column part overlap with the upper cover in the middle.

[0036] An upper sealing member that is compressed between the column portion and the upper cover can be mounted on the upper part of the column portion of the above mounting bushing by fastening the upper fixing nut to the upper fixing portion.

[0038] The above body-side sealing member may be mounted on the upper surface of the upper fixing nut, and configured so that when the coupling bolt is fastened to a weld nut provided in the vehicle body, the body-side sealing member is pressed between the vehicle body and the upper fixing nut.

[0040] In addition, the battery pack mounting structure of the vehicle of the present invention for achieving the above-mentioned purpose is,

[0041] A mounting bushing installed to support the space between the lower case and the upper cover of the battery pack;

[0042] A coupling bolt that penetrates the mounting bush and is coupled to the vehicle body to secure the battery pack to the vehicle body and to generate pressure to seal the space between the mounting bush and the vehicle body;

[0043] A lower fixing nut fastened to a lower fixing portion of the mounting bushing that protrudes downward through the lower case to generate pressure for sealing the space between the mounting bushing and the lower case;

[0044] An upper fixing nut fastened to an upper fixing portion of the mounting bush that protrudes upward through the upper cover to generate pressure for sealing the space between the mounting bush and the upper cover;

[0045] It is characterized by being composed including

[0047] In addition, the present invention comprises a lower sealing member interposed between the mounting bush and the lower case, which is deformed by pressure generated by the lower fixing nut and provides a sealing function;

[0048] An upper sealing member interposed between the mounting bush and the upper case, which is deformed by pressure generated by the upper fixing nut and provides a sealing function;

[0049] A body-side sealing member interposed between the upper fixing nut and the vehicle body, which is deformed by pressure generated by the above-mentioned connecting bolt and provides a sealing function;

[0050] It can be configured to include more.

[0052] The above mounting bush

[0053] A column section located between the lower case and the upper case above;

[0054] The lower fixing part protruding downward from the above column part;

[0055] The upper fixing part protruding upward from the above column part;

[0056] It can be configured to include.

[0058] A flange portion protruding radially is provided on the lower side of the column portion of the above mounting bushing to support the upper surface of the above lower case;

[0059] The above lower fixing part may be formed to accommodate the head of the connecting bolt on the inside.

[0061] The above lower sealing member is interposed between the flange portion of the mounting bushing and the lower case;

[0062] The above upper sealing member may be interposed between the upper end of the column portion of the mounting bushing and the upper cover. Effects of the invention

[0064] The present invention enables the battery pack to be securely mounted to the lower part of the vehicle body, while ensuring that the sealing performance is stably maintained to prevent moisture or foreign substances from penetrating into the interior of the battery pack even under external impacts, thereby ultimately significantly improving the durability and stability of the battery pack. Brief explanation of the drawing

[0066] FIG. 1 is a drawing illustrating a state in which a battery pack is mounted on a vehicle body according to the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a drawing illustrating a state in which an upper sealing member and a lower sealing member are combined on the upper and lower sides of a mounting bushing. Figure 4 is a drawing illustrating that a body-side sealing member is located on the upper side of an upper fixing nut. Specific details for implementing the invention

[0067] Specific structural or functional descriptions of embodiments of the present invention disclosed in this specification or application are merely illustrative for the purpose of explaining embodiments according to the present invention, and embodiments according to the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described in this specification or application.

[0068] Since embodiments according to the present invention may be subject to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention.

[0069] Terms such as "first" and / or "second" may be used to describe various components, but said components shall not be limited by said terms. For the sole purpose of distinguishing one component from another, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0070] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0071] The terms used herein are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0072] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification.

[0073] The present invention will be described in detail below by explaining preferred embodiments of the invention with reference to the attached drawings. Identical reference numerals in each drawing indicate identical components.

[0075] Referring to FIGS. 1 to 4, an embodiment of the battery pack mounting structure of the vehicle of the present invention comprises: a coupling bolt (5) that penetrates the battery pack (1) and is coupled to the vehicle body (3); a mounting bush (11) that penetrates the battery pack (1) and is coupled while receiving the coupling bolt (5) inside, and is formed to maintain a constant gap between the lower case (7) and the upper cover (9) of the battery pack (1) even when the fastening force of the coupling bolt (5) is applied; a lower fixing nut (13) that fixes the lower side of the mounting bush (11) to the lower case (7); and an upper fixing nut (15) that fixes the upper side of the mounting bush (11) to the upper cover (9). The assembly comprises: a lower sealing member (17) installed such that sealing is achieved between the mounting bush (11) and the lower case (7) by fastening the lower fixing nut (13) to the mounting bush (11); an upper sealing member (19) installed such that sealing is achieved between the mounting bush (11) and the upper cover (9) by fastening the upper fixing nut (15) to the mounting bush (11); and a vehicle body sealing member (21) installed such that sealing is achieved between the upper fixing nut (15) and the vehicle body (3) by fastening the coupling bolt (5) to the vehicle body (3).

[0076] That is, the present invention secures the battery pack (1) to the lower part of the vehicle body (3) by passing the coupling bolt (5) through the inside of the mounting bush (11) and fixing it to the vehicle body (3), and the sealing of the part where the battery pack (1) passes through the mounting bush (11) and the coupling bolt (5) is implemented through the lower sealing member (17) and the lower fixing nut (13), the upper sealing member (19) and the upper fixing nut (15), and the vehicle body side sealing member (21) and the coupling bolt (5), thereby excluding the implementation of a sealing function by welding.

[0077] Accordingly, according to the present invention, the welding of the mounting bushing (11) and the lower case (7) or upper cover (9) is damaged by an impact applied to the vehicle body (3) or battery pack (1), thereby preventing the loss of the sealing function of the battery pack (1) and ultimately improving the durability of the battery pack (1).

[0078] In addition, according to the present invention, even if damage occurs to the part related to the mounting bush (11) due to impact or the like, the entire battery pack (1) can be replaced without replacing the mounting bush (11), the lower fixing nut (13), and the upper fixing nut (15), etc., thereby ensuring low cost and easy maintenance.

[0080] In addition, as described above, the mounting bush (11) is joined to the lower case (7) and upper cover (9) through the lower fixing nut (13) and upper fixing nut (15), so unlike when joined by welding, the mounting bush (11) has the freedom to be made of a different material from the lower case (7) or upper cover (9).

[0082] The above mounting bush (11) is positioned between the lower case (7) and the upper cover (9) and comprises: a hollow column-shaped column portion (23) perpendicular to the lower case (7) and the upper case; a lower fixing portion (25) extending downward from the bottom of the column portion (23) and penetrating the lower case (7), to which the lower fixing nut (13) is fastened; and an upper fixing portion (27) extending upward from the top of the column portion (23) and penetrating the upper cover (9), to which the upper fixing nut (15) is fastened.

[0083] That is, the column portion (23) supports the space between the lower case (7) and the upper cover (9), the lower fixing portion (25) protrudes downward from the lower case (7), and the upper fixing portion (27) protrudes upward from the upper cover (9).

[0085] The above mounting bushing (11) is extended radially outward at the bottom of the column portion (23) and is provided with a flange portion (29) that faces the upper surface of the lower case (7) on the opposite side of the lower fixing nut (13) centered on the lower case (7), so that when the lower fixing nut (13) is fastened to the lower fixing portion (25), the flange portion (29) and the lower fixing nut (13) are configured to press the lower case (7) from both sides.

[0086] In addition, a lower sealing member (17) is installed on the flange portion (29) of the mounting bush (11) so that it is compressed between the flange portion (29) and the lower case (7) by fastening the lower fixing nut (13) to the lower fixing portion (25).

[0087] Accordingly, the lower sealing member (17) causes the mounting bush (11) and the lower case (7) to be sealed.

[0088] Meanwhile, the lower fixing part (25) of the mounting bushing (11) is formed with a diameter larger than the inner diameter of the column part (23), so that the head part (31) of the coupling bolt (5) is received inside the lower fixing part (25).

[0089] Therefore, the above-mentioned connecting bolt (5) can be effectively protected from external impacts, etc. by the lower fixing part (25).

[0091] The outer diameter of the upper fixing part (27) of the above mounting bush (11) is formed to be smaller than the outer diameter of the column part (23), so that the upper fixing nut (15) and the upper end of the column part (23) overlap with the upper cover (9) in the middle.

[0092] An upper sealing member (19) is mounted on the upper end of the column portion (23) of the mounting bush (11) such that it is compressed between the column portion (23) and the upper cover (9) by fastening the upper fixing nut (15) to the upper fixing portion (27).

[0093] Accordingly, the upper sealing member (19) causes the mounting bush (11) and the upper cover (9) to be sealed.

[0095] The above body-side sealing member (21) is mounted on the upper surface of the upper fixing nut (15), and is configured so that when the connecting bolt (5) is fastened to the weld nut (33) provided on the body (3), the body-side sealing member (21) is pressed between the body (3) and the upper fixing nut (15).

[0096] Accordingly, the space between the vehicle body (3) and the mounting bush (11) is sealed by the vehicle body side sealing member (21).

[0098] According to the present invention as described above, the mounting bush (11) is mounted to the battery pack (1) by means of a lower fixing nut (13) and an upper fixing nut (15), and the battery pack (1) is mounted to the vehicle body (3) by means of a connecting bolt (5) that passes through the mounting bush (11) and is fastened to the vehicle body (3). By fastening the lower fixing nut (13), the upper fixing nut (15), and the connecting bolt (5), the sealing between the mounting bush (11) and the battery pack (1) and the sealing between the mounting bush (11) and the vehicle body (3) are formed together, thereby preventing the formation of a welded joint vulnerable to impact, thereby improving the durability of the battery pack (1) and enabling easy and inexpensive maintenance.

[0100] The present invention as described above may also be expressed as follows.

[0101] That is, the battery pack (1) mounting structure of the vehicle of the present invention comprises: a mounting bush (11) installed to support the space between the lower case (7) and the upper cover (9) of the battery pack (1); a connecting bolt (5) coupled to the vehicle body (3) by penetrating the mounting bush (11) to secure the battery pack (1) to the vehicle body (3) and to generate pressure to seal the space between the mounting bush (11) and the vehicle body (3); and a lower fixing nut (13) fastened to a lower fixing part (25) of the mounting bush (11) protruding downward through the lower case (7) to generate pressure to seal the space between the mounting bush (11) and the lower case (7). It may be configured to include an upper fixing nut (15) that is fastened to an upper fixing part (27) of the mounting bush (11) that protrudes through the upper cover (9) to generate pressure to seal the space between the mounting bush (11) and the upper cover (9).

[0102] Additionally, the present invention may further comprise a lower sealing member (17) interposed between the mounting bush (11) and the lower case (7) to be deformed by pressure generated by the lower fixing nut (13) and to provide a sealing function; an upper sealing member (19) interposed between the mounting bush (11) and the upper case to be deformed by pressure generated by the upper fixing nut (15) and to provide a sealing function; and a body-side sealing member (21) interposed between the upper fixing nut (15) and the vehicle body (3) to be deformed by pressure generated by the coupling bolt (5) and to provide a sealing function.

[0103] The above mounting bush (11) may be configured to include a column portion (23) located between the lower case (7) and the upper case; a lower fixing portion (25) protruding downward from the column portion (23); and an upper fixing portion (27) protruding upward from the column portion (23).

[0104] A flange portion (29) protruding radially is provided on the lower side of the column portion (23) of the mounting bush (11) to support the upper side of the lower case (7); and the lower fixing portion (25) may be formed to receive the head portion (31) of the coupling bolt (5) on the inside.

[0105] The lower sealing member (17) is interposed between the flange portion (29) of the mounting bush (11) and the lower case (7); and the upper sealing member (19) can be interposed between the upper end of the column portion (23) of the mounting bush (11) and the upper cover (9).

[0107] Although the present invention has been illustrated and described in relation to specific embodiments, it will be obvious to those skilled in the art that the present invention can be modified and changed in various ways without departing from the technical spirit of the invention as provided by the following claims. Explanation of the symbols

[0108] 1; Battery pack 3; Body 5; connecting bolt 7; Lowercase 9; Upper cover 11; Mounting bush 13; Lower fixing nut 15; Upper fixing nut 17; Lower sealing member 19; upper sealing member 21; Body-side sealing member 23; Column section 25; lower fixing part 27; upper fixed part 29; flange section 31; Head section 33; Weld nut

Claims

Claim 1 A coupling bolt that penetrates a battery pack and is coupled to a vehicle body; a mounting bush formed to receive the coupling bolt on its inner side and penetrate the battery pack to be coupled, and to maintain a constant gap between the lower case and the upper cover of the battery pack even when the fastening force of the coupling bolt is applied; a lower fixing nut that fixes the lower side of the mounting bush to the lower case; an upper fixing nut that fixes the upper side of the mounting bush to the upper cover; a lower sealing member installed to provide sealing between the mounting bush and the lower case by fastening the lower fixing nut to the mounting bush; an upper sealing member installed to provide sealing between the mounting bush and the upper cover by fastening the upper fixing nut to the mounting bush; and a vehicle body side sealing member installed to provide sealing between the upper fixing nut and the vehicle body by fastening the coupling bolt to the vehicle body; comprising the above A battery pack mounting structure for a vehicle, characterized in that the mounting bushing is formed to directly support the upper surface of the lower case and the lower surface of the upper cover, thereby directly supporting the compressive force between the lower case and the upper cover. Claim 2 A battery pack mounting structure for a vehicle according to claim 1, wherein the mounting bushing is positioned between the lower case and the upper cover and comprises: a hollow column-shaped column portion perpendicular to the lower case and the upper case; a lower fixing portion extending downward from the bottom of the column portion and penetrating the lower case, to which the lower fixing nut is fastened; and an upper fixing portion extending upward from the top of the column portion and penetrating the upper cover, to which the upper fixing nut is fastened. Claim 3 A battery pack mounting structure for a vehicle according to claim 2, wherein the mounting bushing is extended radially outward from the lower end of the column portion and has a flange portion facing the upper surface of the lower case on the opposite side of the lower fixing nut centered on the lower case, and is configured such that when the lower fixing nut is fastened to the lower fixing portion, the flange portion and the lower fixing nut press the lower case from both sides. Claim 4 A battery pack mounting structure for a vehicle according to claim 3, characterized in that a lower sealing member is mounted on the flange portion of the mounting bushing, which is compressed between the flange portion and the lower case by fastening the lower fixing nut to the lower fixing portion. Claim 5 A battery pack mounting structure for a vehicle according to claim 2, wherein the lower fixing portion of the mounting bushing is formed with a diameter larger than the inner diameter of the column portion, and configured so as to receive the head portion of the coupling bolt inside the lower fixing portion. Claim 6 A battery pack mounting structure for a vehicle according to claim 2, characterized in that the outer diameter of the upper fixing part of the mounting bushing is formed smaller than the outer diameter of the column part, and the upper fixing nut and the upper end of the column part overlap with the upper cover in the middle. Claim 7 A battery pack mounting structure for a vehicle according to claim 6, characterized in that an upper sealing member is mounted on the upper end of the column portion of the mounting bushing, which is compressed between the column portion and the upper cover by fastening the upper fixing nut to the upper fixing portion. Claim 8 A battery pack mounting structure for a vehicle according to claim 1, wherein the body-side sealing member is mounted on the upper surface of the upper fixing nut, and is configured such that when the coupling bolt is fastened to a weld nut provided in the vehicle body, the body-side sealing member is pressed between the vehicle body and the upper fixing nut. Claim 9 A battery pack mounting structure for a vehicle, comprising: a mounting bush installed to support the space between the lower case and the upper cover of a battery pack; a connecting bolt coupled to the vehicle body by penetrating the mounting bush to secure the battery pack to the vehicle body and to generate pressure to seal the space between the mounting bush and the vehicle body; a lower fixing nut fastened to a lower fixing portion of the mounting bush protruding through the lower case to generate pressure to seal the space between the mounting bush and the lower case; and an upper fixing nut fastened to an upper fixing portion of the mounting bush protruding through the upper cover to generate pressure to seal the space between the mounting bush and the upper cover; wherein the mounting bush is formed to directly support the upper surface of the lower case and the lower surface of the upper cover, thereby directly supporting the compressive force between the lower case and the upper cover. Claim 10 A battery pack mounting structure of a vehicle according to claim 9, further comprising: a lower sealing member interposed between the mounting bush and the lower case, which is deformed by pressure generated by the lower fixing nut and provides a sealing function; an upper sealing member interposed between the mounting bush and the upper case, which is deformed by pressure generated by the upper fixing nut and provides a sealing function; and a body-side sealing member interposed between the upper fixing nut and the vehicle body, which is deformed by pressure generated by the coupling bolt and provides a sealing function. Claim 11 A battery pack mounting structure for a vehicle according to claim 10, wherein the mounting bushing comprises: a column portion located between the lower case and the upper case; a lower fixing portion protruding downward from the column portion; and an upper fixing portion protruding upward from the column portion. Claim 12 A battery pack mounting structure for a vehicle according to claim 11, wherein a flange portion protruding radially is provided on the lower side of the column portion of the mounting bushing to support the upper surface of the lower case; and wherein the lower fixing portion is formed to receive the head portion of the coupling bolt on the inside. Claim 13 A battery pack mounting structure for a vehicle according to claim 12, wherein the lower sealing member is interposed between the flange portion of the mounting bush and the lower case; and the upper sealing member is interposed between the upper end of the column portion of the mounting bush and the upper cover.

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