CN210379152U

CN210379152U - Battery case and sealing structure thereof

Info

Publication number: CN210379152U
Application number: CN201921168413.5U
Authority: CN
Inventors: 周青华
Original assignee: Guangzhou Automobile New Energy Automobile Co Ltd
Current assignee: Gac Aion New Energy Vehicle Co ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-21
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a battery shell and a sealing structure thereof.A guide piece penetrates through a second shell and is connected with the second shell in a sealing way; connecting the end cover on the guide piece, and enabling the first shell to be fixed on the second shell through the matching of the end cover and the guide piece; then, the mounting member is passed through the first through hole and the second through hole, respectively, and the protruding portion of the mounting member is attached to the vehicle body to complete the mounting operation of the battery case. Because sealing connection between guide and the second casing, consequently, effectively prevent water infiltration to the battery module between the gap between guide and the second casing. Simultaneously, because first sealing member and the sealed cooperation of first casing on the guide, the second sealing member on the end cover also with the sealed cooperation of first casing, consequently, all be encapsulated situation between guide and the first casing, between end cover and the first casing, effectively prevent that water from in the guide and the first casing, between end cover and the first casing infiltration battery case, be favorable to improving battery module's security.

Description

Battery case and sealing structure thereof

Technical Field

The utility model relates to a new energy automobile technical field especially relates to a battery case and seal structure thereof.

Background

With the increasing maturity of new energy technology, new energy automobiles gradually enter the public vision. The new energy automobile is an automobile which adopts non-traditional fuel as a power source, integrates the power control and driving technologies of the automobile and forms a new technology and a new structure. The main core technology of the new energy automobile lies in a battery module, and the safety and the stability of the battery module directly determine the performance of the whole automobile.

Currently, a battery module is generally mounted in a battery case, through which the battery module is mounted on a vehicle body. Therefore, the sealability of the battery case also determines the safety of the battery module. In order to fix the conventional battery housing on the vehicle body stably, a mounting point is usually arranged in the middle of the battery housing, and the battery housing is connected with the vehicle body through a bolt penetrating through the battery housing. However, the integrity of the battery shell is easily damaged, water on the vehicle body permeates into the battery shell from the bolt, the battery module is caused to be wetted or water enters, the battery module is easily damaged, even spontaneous combustion or explosion occurs, and the use safety of the whole vehicle is seriously affected.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is desirable to provide a battery case and a sealing structure thereof, which can enhance the sealing effect and improve the safety of a battery module.

The technical scheme is as follows:

a sealing structure of a battery case, comprising: the guide piece is used for penetrating through the second shell and is in sealing connection with the second shell, and a first through hole is formed in the guide piece; the end cover is connected with the guide piece, the end cover and the guide piece are matched to fix the first shell on the second shell, a second through hole communicated with the first through hole is formed in the end cover, and the first through hole and the second through hole are used for penetrating out of a mounting piece; and the first sealing element and the second sealing element are respectively used for being in sealing fit with two opposite sides of the first shell.

In the sealing structure of the battery shell, the guide piece penetrates through the second shell and is connected with the second shell in a sealing way; connecting the end cover on the guide piece, and enabling the first shell to be fixed on the second shell through the matching of the end cover and the guide piece; then, the mounting member is passed through the first through hole and the second through hole, respectively, and the protruding portion of the mounting member is attached to the vehicle body to complete the mounting operation of the battery case. Because sealing connection between guide and the second casing, consequently, effectively prevent water infiltration to the battery module between the gap between guide and the second casing. Meanwhile, the first sealing element on the guide piece is in sealing fit with the first shell, and the second sealing element on the end cover is also in sealing fit with the first shell, so that the guide piece and the first shell and the end cover and the first shell are in a sealing state, and water is effectively prevented from permeating into the battery shell from the space between the guide piece and the first shell and the space between the end cover and the first shell. Therefore, the installation piece and the battery shell are separated through the guide piece, and the problem that the sealing performance of the battery shell is reduced due to the fact that the installation piece directly penetrates through the battery shell is avoided; simultaneously, seal the design to the guide both ends again for guide and battery case zonulae occludens make battery case keep encapsulated situation, avoid during water infiltration battery case and damage battery module, thereby be favorable to improving battery module's security.

The principle and effect of the present invention will be further explained by combining the above scheme:

in one embodiment, a first pressure bearing part is arranged on the guide piece, a second pressure bearing part is arranged on the end cover, the first pressure bearing part and the second pressure bearing part are matched for pressing the first shell, the first sealing element is arranged on the first pressure bearing part, and the second sealing element is arranged on the second pressure bearing part.

In one embodiment, a first mounting groove is formed in the first bearing portion, the first mounting groove is circumferentially arranged along the first through hole, and the first sealing element is arranged in the first mounting groove.

In one embodiment, a second mounting groove is formed in the second bearing portion, the second mounting groove is circumferentially arranged along the second through hole, and the second sealing element is arranged in the second mounting groove.

In one embodiment, the sealing structure of the battery case further includes a third sealing member, an interference portion is provided in the first through hole, and the third sealing member is configured to be disposed between the interference portion and the flange of the mounting member.

In one embodiment, the third sealing member has an opening therein, and the opening is in communication with the first through hole.

A battery shell comprises a first shell, a second shell and a sealing structure of the battery shell, wherein a guide piece penetrates through the second shell and is in sealing connection with the second shell, the first shell is matched and fixed on the second shell through an end cover and the guide piece, a first sealing piece is arranged between the guide piece and the first shell, and a second sealing piece is arranged between the end cover and the first shell.

The battery shell adopts the sealing structure of the battery shell, and the guide piece penetrates through the second shell and is connected with the second shell in a sealing way; connecting the end cover on the guide piece, and enabling the first shell to be fixed on the second shell through the matching of the end cover and the guide piece; then, the mounting member is passed through the first through hole and the second through hole, respectively, and the protruding portion of the mounting member is attached to the vehicle body to complete the mounting operation of the battery case. Because sealing connection between guide and the second casing, consequently, effectively prevent water infiltration to the battery module between the gap between guide and the second casing. Meanwhile, the first sealing element on the guide piece is in sealing fit with the first shell, and the second sealing element on the end cover is also in sealing fit with the first shell, so that the guide piece and the first shell and the end cover and the first shell are in a sealing state, and water is effectively prevented from permeating into the battery shell from the space between the guide piece and the first shell and the space between the end cover and the first shell. Therefore, the installation piece and the battery shell are separated through the guide piece, and the problem that the sealing performance of the battery shell is reduced due to the fact that the installation piece directly penetrates through the battery shell is avoided; simultaneously, seal the design to the guide both ends again for guide and battery case zonulae occludens make battery case keep encapsulated situation, avoid during water infiltration battery case and damage battery module, thereby be favorable to improving battery module's security.

In one embodiment, the second casing includes a frame structure and a bottom plate structure, a connecting surrounding edge is arranged on the inner wall of the frame structure, the connecting surrounding edge is arranged along the circumferential direction of the frame structure, and the bottom plate structure is connected to the connecting surrounding edge.

In one embodiment, a first glue groove is formed in the connecting surrounding edge, glue is injected into the first glue groove, and the bottom plate structure is bonded to the connecting surrounding edge.

In one embodiment, a first fixing hole is formed in the frame structure, the first housing is covered on the frame structure, a second fixing hole opposite to the first fixing hole is formed in the first housing, and the first housing penetrates through the first fixing hole and the second fixing hole through a fixing member and is fixed on the frame structure.

In one embodiment, a third mounting groove is formed in the frame structure, the third mounting groove extends along the circumferential direction of the frame structure, a fourth sealing element is arranged in the third mounting groove, and the fourth sealing element is in sealing fit with the first shell.

In one embodiment, the bottom plate structure comprises a middle longitudinal beam and more than two bottom plates, two opposite sides of the middle longitudinal beam are respectively connected with the bottom plates, the bottom plates are connected with the connecting surrounding edges, and the guide piece penetrates through the middle longitudinal beam and is connected with the middle longitudinal beam in a sealing mode.

In one embodiment, the frame structure includes a first cross beam, a first longitudinal beam, a first oblique beam, a second cross beam, a second oblique beam, and a second longitudinal beam, which are connected in sequence, and the connecting surrounding edges are disposed on the first cross beam, the first longitudinal beam, the first oblique beam, the second cross beam, the second oblique beam, and the second longitudinal beam.

Drawings

Fig. 1 is a top view of a battery case structure according to an embodiment of the present invention;

FIG. 2 is a structural sectional view of the battery case of FIG. 1 taken along the line A-A;

FIG. 3 is an enlarged view of the structure at the circle B in FIG. 2;

FIG. 4 is an enlarged view of the structure of FIG. 2 at circle C;

fig. 5 is an exploded view of a battery case structure according to an embodiment of the present invention;

fig. 6 is a structural bottom view of a battery case according to an embodiment of the present invention;

FIG. 7 is a structural cross-sectional view of the battery case of FIG. 6 taken along the direction D-D;

fig. 8 is an enlarged view of the structure at the circle E in fig. 7.

Description of reference numerals:

100. battery case, 110, sealing structure of battery case, 111, guide, 1111, first through hole, 1112, first pressure-bearing part, 1113, first mounting groove, 1114, interference part, 112, end cap, 1121, second through hole, 1122, second pressure-bearing part, 1123, second mounting groove, 113, first sealing member, 114, second sealing member, 115, third sealing member, 1151, opening, 120, first case, 121, first fixing hole, 130, second case, 131, frame structure, 1311, first beam, 1312, second beam, 1313, first beam, 1314, second beam, 1315, first beam, 1316, second beam, 1317, second fixing hole, mounting groove 1318, third fixing hole, 132, bottom plate structure, 1321, middle beam, 1322, bottom plate, 133, connecting peripheral edge, 1331, first glue groove, 140, mounting part, 150, structural glue, mounting part 160, base plate, 161, second glue groove, 170, A fixing piece 180 and a fourth sealing piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

In one embodiment, referring to fig. 1, fig. 2 and fig. 3, a sealing structure 110 of a battery case includes: guide 111, end cap 112, first seal 113 and second seal 114. The guide 111 penetrates through the second housing 130 and is connected to the second housing 130 in a sealing manner, and a first through hole 1111 is formed in the guide 111. The end cap 112 is connected to the guide 111, the end cap 112 is matched with the guide 111 to fix the first housing 120 to the second housing 130, and the end cap 112 is provided with a second through hole 1121 communicating with the first through hole 1111. The first through hole 1111 and the second through hole 1121 are used for penetrating out of the mounting member 140. The first seal 113 is provided on the guide 111. A second seal 114 is disposed on the end cap 112, and a first seal 113 and the second seal 114 are respectively configured to sealingly engage opposite sides of the first housing 120.

The sealing structure 110 of the battery case is formed by penetrating the guide 111 through the second case 130 and sealing and connecting the second case 130; then, the end cap 112 is connected to the guide 111, and the first housing 120 is fixed to the second housing 130 by the end cap 112 matching with the guide 111; next, the mounting member 140 is inserted through the first through-hole 1111 and the second through-hole 1121, respectively, and the protruding portion of the mounting member 140 is coupled to the vehicle body, thereby completing the mounting operation of the battery case 100. Since the guide 111 and the second case 130 are hermetically connected, water is effectively prevented from penetrating into the battery module from between the gap between the guide 111 and the second case 130. Meanwhile, the first sealing member 113 on the guide 111 is in sealing fit with the first housing 120, and the second sealing member 114 on the end cover 112 is also in sealing fit with the first housing 120, so that the space between the guide 111 and the first housing 120 and the space between the end cover 112 and the first housing 120 are both in a sealing state, and water is effectively prevented from permeating into the battery housing 100 from the space between the guide 111 and the first housing 120 and the space between the end cover 112 and the first housing 120. Therefore, in the present embodiment, the guide 111 separates the mounting member 140 from the battery case 100, thereby preventing the mounting member 140 from directly penetrating the battery case 100 to reduce the sealability of the battery case 100; meanwhile, the two ends of the guide part 111 are sealed, so that the guide part 111 is tightly connected with the battery shell 100, the battery shell 100 keeps a sealing state, the damage to the battery module caused by the water permeating into the battery shell 100 is avoided, and the safety of the battery module is improved.

It should be noted that, the guide 111 is hermetically connected to the second housing 130, and it should be understood that a portion of the guide 111 penetrating the second housing 130 is tightly connected to the second housing 130. The guide 111 and the second housing 130 are connected in a sealing manner by an adhesive or a welding method. The guide 111 of the present embodiment is connected to the second housing 130 by welding.

It is further noted that the mounting member 140 may be a screw, pin, bolt, rivet, or other mounting feature.

Specifically, the end cap 112 is detachably coupled to the guide 111, so that the battery case 100 can be quickly assembled or maintained. The end cap 112 and the guide 111 may be detachably connected by a screw or a snap. When the end cap 112 is screwed with the guide 111, the end cap 112 is provided with external threads, and the first through hole 1111 of the guide 111 is provided with internal threads. In operation, the end cap 112 is inserted into the first bore 1111 and threadably attached thereto.

Further, referring to fig. 3, the guide 111 is provided with a first pressure receiving portion 1112. The end cover 112 is provided with a second pressure receiving portion 1122. The first pressure receiving portion 1112 and the second pressure receiving portion 1122 are engaged to press the first housing 120. The first seal 113 is provided on the first pressure receiving portion 1112. The second seal 114 is provided on the second pressure receiving portion 1122. In this way, the first pressure-bearing portion 1112 and the second pressure-bearing portion 1122 are beneficial to increasing the contact surface between the guide 111 and the first housing 120 and the contact surface between the end cover 112 and the first housing 120, so that the first housing 120 is more stably fixed; meanwhile, the first housing 120 is effectively prevented from being pressed and deformed by the end cap 112 and the guide 111, which is beneficial to maintaining the flatness of the first housing 120.

Further, referring to fig. 3, the first pressure-bearing portion 1112 is provided with a first mounting groove 1113. The first mounting groove 1113 is circumferentially disposed along the first penetration 1111. The first sealing member 113 is disposed in the first mounting groove 1113. As a result, the first sealing member 113 is stably fixed to the first pressure receiving portion 1112 through the first mounting groove 1113, so that a better sealing effect is achieved for the first housing 120. Specifically, in the embodiment, the first mounting groove 1113 is an annular groove, and the material of the first sealing member 113 may be nitrile rubber, urethane rubber, fluorine rubber, silicone rubber, acrylate rubber, or other rubber material.

In one embodiment, referring to fig. 3, a second mounting groove 1123 is formed on the second bearing portion 1122. The second mounting groove 1123 is circumferentially disposed along the second penetration hole 1121. The second sealing member 114 is disposed in the second mounting groove 1123. Also, the second sealing member 114 is stably installed by the second installation groove 1123, so that a better sealing effect is achieved. The material of the second sealing member 114 may also be nitrile rubber, urethane rubber, fluorine rubber, silicone rubber, acrylate rubber, or other rubber materials.

In one embodiment, referring to fig. 3, when the first sealing member 113 and the second sealing member 114 are respectively used for sealing and matching with the first housing 120, the first sealing member 113 is disposed around the periphery of the second sealing member 114; alternatively, the second seal 114 is disposed around the first seal 113, even if the first seal 113 and the second seal 114 are not disposed opposite to each other. In this way, the first sealing member 113 and the second sealing member 114 are arranged in a staggered manner, and are respectively applied to different parts of the first housing 120, so that the sealing area is increased, and the sealing performance between the guide 111 and the first housing 120, and between the end cover 112 and the first housing 120 is better. Specifically, in the present embodiment, the second sealing element 114 is disposed around the first sealing element 113, so that when the end cap 112 is fixed, the first housing 120 bends and deforms toward the second housing 130 under the compression of the second sealing element 114, so that the first housing 120 and the second housing 130 are connected more tightly. Meanwhile, the first sealing element 113 and the second sealing element 114 are both O-shaped rings, the outer diameter of the first sealing element 113 is 36mm, and the outer diameter of the second sealing element 114 is 42 mm.

In one embodiment, referring to fig. 3, the sealing structure 110 of the battery case further includes a third sealing member 115. The first through hole 1111 has an interference portion 1114. Third seal 115 is adapted to be disposed between interference 1114 and a flange of mount 140. When the battery case 100 is assembled, the third sealing member 115 improves the sealing property between the flange of the mounting member 140 and the abutting portion 1114, which is advantageous for improving the sealing property of the entire vehicle. In this embodiment, the material of the third sealing member 115 may also be nitrile rubber, urethane rubber, fluorine rubber, silicone rubber, acrylate rubber, or other rubber materials.

Further, referring to fig. 3, an opening 1151 is formed on the third sealing member 115. The opening 1151 is disposed to communicate with the first penetration 1111. Since the mounting member 140 is coupled to the vehicle body through the first and second through

holes

1111 and 1121, water on the vehicle body easily flows in from the second and first through

holes

1121 and 1111 and accumulates in the guide 111, corroding the inner structure of the guide 111 and destroying the sealability of the battery case 100. Therefore, in the present embodiment, the opening 1151 is formed in the third sealing member 115, so that water in the guide 111 can be discharged from the opening 1151 in time, corrosion of the guide 111 due to accumulated water can be avoided, the structural integrity of the guide 111 can be maintained, and the sealing performance of the battery case 100 can be maintained.

In one embodiment, referring to fig. 1, fig. 2 and fig. 3, a battery case 100 includes a first case 120, a second case 130 and a sealing structure 110 of the battery case in any one of the above embodiments. The guide 111 penetrates the second housing 130 and is hermetically connected to the second housing 130. The first housing 120 is fixed to the second housing 130 by the end cap 112 in cooperation with the guide 111. The first seal 113 is disposed between the guide 111 and the first housing 120. A second seal 114 is disposed between the end cap 112 and the first housing 120.

The battery case 100 described above employs the above battery case sealing structure 110, and the guide 111 penetrates the second case 130 and is connected to the second case 130 in a sealing manner; then, the end cap 112 is connected to the guide 111, and the first housing 120 is fixed to the second housing 130 by the end cap 112 matching with the guide 111; next, the mounting member 140 is inserted through the first through-hole 1111 and the second through-hole 1121, respectively, and the protruding portion of the mounting member 140 is coupled to the vehicle body, thereby completing the mounting operation of the battery case 100. Since the guide 111 and the second case 130 are hermetically connected, water is effectively prevented from penetrating into the battery module from between the gap between the guide 111 and the second case 130. Meanwhile, the first sealing member 113 on the guide 111 is in sealing fit with the first housing 120, and the second sealing member 114 on the end cap 112 is also in sealing fit with the first housing 120, so that the space between the guide 111 and the first housing 120 and the space between the end cap 112 and the first housing 120 are both in a sealing state, and water is effectively prevented from permeating into the battery housing 100 from the space between the guide 111 and the first housing 120 and the space between the end cap 112 and the first housing 120. Therefore, in the present embodiment, the guide 111 separates the mounting member 140 from the battery case 100, thereby preventing the mounting member 140 from directly penetrating the battery case 100 to reduce the sealability of the battery case 100; meanwhile, the two ends of the guide part 111 are sealed, so that the guide part 111 is tightly connected with the battery shell 100, the battery shell 100 keeps a sealed state, water is prevented from permeating into the battery shell 100 to damage the battery module, and the safety of the battery module is improved.

Further, referring to fig. 2 and fig. 5, the second housing 130 includes a frame structure 131 and a bottom plate structure 132. The inner wall of the frame structure 131 is provided with a connecting surrounding edge 133. The connecting peripheral edge 133 is disposed along the circumferential direction of the bezel structure 131. The floor structure 132 is attached to the attachment perimeter 133. In this manner, the bottom plate structure 132 is stably connected to the frame structure 131 by the connecting surrounding edge 133. Specifically, in this embodiment, the portion of the bottom plate structure 132 connected to the connecting surrounding edge 133 is a step structure, and the step structure is just matched with the connecting surrounding edge 133 in size, so that when the bottom plate structure 132 is connected to the connecting surrounding edge 133, the height difference does not occur, which is beneficial to improving the integrity of the battery case 100.

Further, referring to fig. 2 and fig. 4, a first glue groove 1331 is disposed on the connecting surrounding edge 133. The first glue groove 1331 is used for injecting glue. The floor structure 132 is bonded to the attachment perimeter 133. Therefore, the frame structure 131 and the bottom plate structure 132 of the present embodiment are connected in an adhesion manner, so that the overall weight of the battery case 100 is greatly reduced on the premise of ensuring the structural strength of the battery case 100, and the light weight of the entire vehicle is facilitated; meanwhile, through glue, the sealing performance between the connecting surrounding edge 133 and the bottom plate structure 132 is also improved, which is beneficial to improving the waterproof safety performance of the battery shell 100. In addition, the first glue groove 1331 is formed in the connecting surrounding edge 133, so that the adhesive force of glue is improved, and the connecting strength between the connecting surrounding edge 133 and the bottom plate structure 132 is increased. In this embodiment, the first glue groove 1331 is used for injecting the structural glue 150, so that the connection performance and the sealing performance between the connecting surrounding edge 133 and the bottom plate structure 132 are greatly improved. Wherein the model of the structural adhesive 150 can be Dow 4600f, the single-component epoxy resin adhesive, the baking dimension of the structural adhesive 150 is 180 ℃/30min, and the gluing temperature is 25-45 ℃. Meanwhile, before the connecting surrounding edge 133 and the bottom plate structure 132 are bonded, an oxide film layer is arranged on the connecting surrounding edge 133 and/or the bottom plate structure 132, so that the adhesive force of the structural adhesive 150 is increased through the oxide film layer, and the bonding strength of the connecting surrounding edge 133 and the bottom plate structure 132 is improved. The oxide film layer may be prepared by an anodic oxidation process or a passivation process, and during the preparation process, the surface of the workpiece needs to be kept clean.

In one embodiment, referring to fig. 6, 7 and 8, the frame structure 131 is provided with a first fixing hole 121. The first housing 120 covers the frame structure 131, and the first housing 120 is provided with a second fixing hole 1317 opposite to the first fixing hole 121. The first housing 120 is fixed to the frame structure 131 by the fixing member 170 penetrating the first fixing hole 121 and the second fixing hole 1317. In this way, the first housing 120 is stably fixed on the frame structure 131. In the present embodiment, the first fixing hole 121 is disposed on the outer edge of the frame structure 131, that is, the sealing failure of the battery case 100 caused by the opening of the frame structure 131 near the second case 130 is effectively avoided. Meanwhile, the fixing member 170 of the present embodiment is a hot-melt tapping screw, which is beneficial to increase of the number of times of assembling and disassembling the battery case 100.

Further, referring to fig. 8, a third mounting groove 1318 is disposed on the frame structure 131. The third mounting groove 1318 extends along the circumference of the frame structure 131, and a fourth sealing member 180 is disposed in the third mounting groove 1318, and the fourth sealing member 180 is in sealing engagement with the first housing 120. In this way, the fourth sealing member 180 increases the sealing property between the first housing 120 and the frame structure 131. Meanwhile, the third mounting groove 1318 is disposed on the frame structure 131, which is beneficial to achieving the effect of balanced support of tightening force during the fixing process of the first housing 120 and the frame structure 131. Specifically, in the present embodiment, the fourth sealing element 180 is a sealant.

In one embodiment, referring to fig. 5, the bottom plate structure 132 includes a middle longitudinal beam 1321 and more than two bottom plates 1322. Opposite sides of the middle longitudinal beam 1321 are respectively connected with the bottom plate 1322, the bottom plate 1322 is connected with the connecting surrounding edge 133, and the guide member 111 penetrates through the middle longitudinal beam 1321 and is connected with the middle longitudinal beam 1321 in a sealing manner. Therefore, in the process of closing the vehicle, the stress of the middle mounting point acts on the middle longitudinal beam 1321, which is beneficial to improving the mounting stability of the battery shell 100 on the vehicle body. Specifically, in the present embodiment, two sides of the middle longitudinal beam 1321 are respectively bonded to two or more bottom plates 1322, and the bottom plates 1322 are bonded to the connecting peripheral edge 133, so that most of the connection methods of the battery case 100 of the present embodiment are performed by using bonding methods, which greatly reduces the overall weight of the battery case 100. Specifically, in the present embodiment, the middle longitudinal beam 1321 and the frame structure 131 are both provided with fixing seats for fixing the battery modules, and therefore, the battery modules are supported on the middle longitudinal beam 1321 and the frame structure 131, rather than on the bottom plate 1322, so that the bottom plate structure 132 is prevented from being deformed due to the weight, which is beneficial to maintaining the structural stability of the battery case 100.

In one embodiment, referring to fig. 5, the battery casing 100 further includes a substrate 160, and the bottom plate structure 132 is disposed on the substrate 160. The base plate 160 further protects the bottom plate structure 132, so that the safety of the battery case 100 is further improved. Specifically, in this embodiment, the substrate 160 is provided with a second glue groove 161, and the second glue groove 161 is used for injecting glue, so that the bottom plate structure 132 is bonded to the substrate 160.

In one embodiment, referring to fig. 1, the frame structure 131 includes a first cross member 1311, a first longitudinal member 1313, a first inclined member 1315, a second cross member 1312, a second inclined member 1316, and a second longitudinal member 1314, which are sequentially connected. The connecting skirts 133 are all disposed on the first cross member 1311, the first longitudinal member 1313, the first oblique member 1315, the second cross member 1312, the second oblique member 1316 and the second longitudinal member 1314.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A seal structure of a battery case, comprising:

the guide piece is used for penetrating through the second shell and is in sealing connection with the second shell, and a first through hole is formed in the guide piece;

the end cover is connected with the guide piece, the end cover and the guide piece are matched to fix the first shell on the second shell, a second through hole communicated with the first through hole is formed in the end cover, and the first through hole and the second through hole are used for penetrating out of a mounting piece; and

the first sealing element is arranged on the guide element, the second sealing element is arranged on the end cover, and the first sealing element and the second sealing element are respectively used for being in sealing fit with two opposite sides of the first shell.

2. A sealing structure of a battery case according to claim 1, wherein a first pressure-bearing portion is provided on the guide member, a second pressure-bearing portion is provided on the end cap, the first pressure-bearing portion and the second pressure-bearing portion are engaged for pressing the first case, the first sealing member is provided on the first pressure-bearing portion, and the second sealing member is provided on the second pressure-bearing portion.

3. A sealing structure of a battery case according to claim 2, wherein a first mounting groove is provided on the first pressure receiving portion, the first mounting groove being circumferentially provided along the first penetration hole, the first sealing member being provided in the first mounting groove; and/or the presence of a gas in the gas,

and a second mounting groove is formed in the second pressure bearing part, the second mounting groove is circumferentially arranged along the second perforation, and the second sealing element is arranged in the second mounting groove.

4. A sealing structure of a battery case according to any one of claims 1 to 3, further comprising a third sealing member, an interference portion being provided in the first through hole, the third sealing member being adapted to be disposed between the interference portion and the flange of the mounting member.

5. A seal structure of a battery case according to claim 4, wherein said third seal member is provided with an opening, said opening being provided in communication with said first through hole.

6. A battery case, comprising a first case, a second case and the sealing structure of the battery case as claimed in any one of claims 1 to 5, wherein the guide member penetrates through the second case and is connected to the second case in a sealing manner, the first case is fixed to the second case by the end cap and the guide member in a fitting manner, the first sealing member is disposed between the guide member and the first case, and the second sealing member is disposed between the end cap and the first case.

7. The battery shell according to claim 6, wherein the second shell comprises a frame structure and a bottom plate structure, the frame structure is provided with a connecting surrounding edge on an inner wall, the connecting surrounding edge is arranged along a circumferential direction of the frame structure, and the bottom plate structure is connected to the connecting surrounding edge.

8. The battery case as set forth in claim 7, wherein a first glue groove is formed on the connecting peripheral edge, the first glue groove being used for injecting glue, and the bottom plate structure is bonded to the connecting peripheral edge.

9. The battery casing according to claim 7, wherein a first fixing hole is formed in the frame structure, the first casing is covered on the frame structure, a second fixing hole opposite to the first fixing hole is formed in the first casing, and the first casing is fixed on the frame structure by a fixing member penetrating through the first fixing hole and the second fixing hole; alternatively, the first and second electrodes may be,

the frame structure is provided with a third mounting groove, the third mounting groove is arranged along the circumferential extension of the frame structure, a fourth sealing element is arranged in the third mounting groove, and the fourth sealing element is in sealing fit with the first shell.

10. The battery case as set forth in claim 7, wherein the bottom plate structure comprises a middle longitudinal beam and two or more bottom plates, wherein the middle longitudinal beam is connected with the bottom plates on two opposite sides, the bottom plates are connected with the connecting peripheral edges, and the guide member penetrates through the middle longitudinal beam and is connected with the middle longitudinal beam in a sealing manner; alternatively, the first and second electrodes may be,

the frame structure comprises a first cross beam, a first longitudinal beam, a first oblique beam, a second cross beam, a second oblique beam and a second longitudinal beam which are sequentially connected, wherein the connecting surrounding edge is arranged on the first cross beam, the first longitudinal beam, the first oblique beam, the second cross beam, the second oblique beam and the second longitudinal beam.