Battery box exhaust structure and battery box

Abstract

The utility model discloses a battery box body exhaust structure and a battery box body, the battery box body exhaust structure comprises a supporting main body, the supporting main body is provided with an exhaust cavity, one end of the supporting main body is used for being connected with the bottom wall of a cavity of the battery box body, and the side wall of the supporting main body is provided with a side air inlet communicated with the exhaust cavity; the side air inlet is communicated with the cavity of the battery box body; the sealing cover is assembled with the other end of the supporting main body in a sealing manner, an exhaust hole communicated with the exhaust cavity is formed in the sealing cover, and the exhaust hole is communicated with the outside of the cavity of the battery box body. According to the battery box body, gas generated by foaming can enter the exhaust cavity from the side air inlet hole and then is exhausted through the exhaust hole of the sealing cover, so that the problem that the interior of the battery box body which is fully encapsulated with polystyrene foam cannot be exhausted due to sealing is solved, and the cavitation bubbles in the battery box body are reduced.

Description

Technical Field

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

[0002] In the field of battery pack manufacturing, foaming technology is widely used to improve the sealing, thermal insulation and mechanical strength of battery packs. At present, the mainstream battery pack foaming methods mainly include foaming outside the module box and non-full-encapsulation foaming of the whole pack. These foaming methods usually foam in parts of the module or battery pack, without considering the gas emission problem during the foaming process, because they are usually carried out in an open or semi-open environment.

[0003] However, with the continuous development of battery pack design and manufacturing technology, full encapsulation foaming technology has gradually attracted attention. Full encapsulation foaming technology aims to provide more uniform and complete sealing and thermal insulation effects by fully injecting foaming materials into the battery pack. However, this technology faces a key challenge: how to effectively discharge the gas generated during the foaming process.

[0004] Specifically, in the manufacturing process of fully encapsulated foamed battery packs, once the box cover is locked, a closed space is formed inside the battery pack. In this space, the foaming material will produce gas during the curing reaction. Since the inside of the battery pack is closed, these gases cannot be discharged naturally, thus forming cavitation at the bottom of the box cover. These cavitations not only affect the overall aesthetics of the battery pack, but more importantly, they will destroy the bonding structure between the box cover and the box body, weaken the sealing performance of the battery pack, and thus affect its safety. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art, the utility model provides a battery box exhaust structure and a battery box, which can solve the exhaust problem of potting foaming.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A battery case exhaust structure comprises: a supporting body, the supporting body having an exhaust cavity, one end of the supporting body being used to connect to the bottom wall of the cavity of the battery case, the side wall of the supporting body being provided with a side air inlet hole communicating with the exhaust cavity, the side air inlet hole being communicated with the cavity of the battery case; a sealing cover, the sealing cover being sealingly assembled with the other end of the supporting body, the sealing cover being provided with an exhaust hole communicating with the exhaust cavity, the exhaust hole being communicated with the outside of the cavity of the battery case.

[0008] By adopting the above scheme, the gas generated by foaming can enter the exhaust cavity from the side air inlet hole and then be discharged through the exhaust hole of the sealing cover, thereby solving the problem that the inside of the battery box fully encapsulated with foam glue cannot be vented due to being sealed, thereby reducing the cavitation in the battery box.

[0009] Furthermore, the other end of the support body is provided with a lip plate extending outward from the exhaust hole, and a sealing groove surrounding the exhaust hole is provided on a surface of the lip plate facing the sealing cover, and a sealing member is provided in the sealing groove.

[0010] By adopting the above solution, the design of the lip plate and the sealing groove increases the contact area between the support body, the sealing cover and the battery cover body, and improves the stability of the connection. At the same time, the presence of the seal also plays a certain buffering role, which can reduce the risk of damage caused by vibration or impact.

[0011] Furthermore, the sealing cover includes, from one end to the other end, in sequence: a sealing section, a ring groove is arranged in the circumference of the sealing section, a sealing ring is arranged in the ring groove, and the sealing ring abuts against the cavity wall of the exhaust cavity; a fixing section, an external thread is arranged in the circumference of the fixing section; and an operating section, the operating section includes a cover plate, and the cover plate abuts against the lip plate.

[0012] By adopting the above scheme, the sealing section can ensure the sealing effect between the sealing cover and the supporting body, the fixing section can achieve the connection and fixing effect between the sealing cover and the supporting body, and the operating section facilitates the operation of the sealing cover, thereby completing the connection and fixing between the fixing section and the supporting body.

[0013] Furthermore, the exhaust cavity of the supporting body includes, from one end to the other end: a cavity, one end of which is abutted against the middle beam of the cavity bottom wall in the battery box, and the side air inlet hole is circumferentially arranged at the other end of the cavity; a sealed cavity, which is sealed and connected to the sealing ring of the sealing section; and a connecting cavity, which is provided with an internal thread for connecting to the external thread of the fixed section.

[0014] By adopting the above solution, the connecting cavity can be threadedly connected to the fixing section, and the sealing cavity can be sealed with the sealing section, thereby ensuring the air tightness of the connection between the cavity and the exhaust cavity and the side exhaust cavity.

[0015] Furthermore, the diameter of the cavity wall of the sealed cavity is equal to the diameter of the cavity wall of the cavity, and the diameter of the cavity wall of the connecting cavity is greater than the diameter of the cavity wall of the sealed cavity.

[0016] The above solution is adopted to facilitate the assembly between the sealing cover and the supporting body.

[0017] Furthermore, an assembly platform extending out of the exhaust cavity is provided at one end of the support body, and the assembly platform is fitted and connected to the middle beam of the bottom wall of the cavity in the battery box.

[0018] By adopting the above solution, the contact area between the support body and the assembly platform is increased, thereby improving the support stability of the support body and further improving its own strength.

[0019] Furthermore, a glue layer is provided between the edge of the assembly platform and the middle beam.

[0020] By adopting the above solution, the connection stability and air tightness between the support body and the assembly platform are improved.

[0021] Furthermore, a boss is protruding from the surface of the cover plate away from the exhaust cavity, and the boss is provided with an operating flat position.

[0022] By adopting the above solution, the operation flat position is conducive to the user driving the cover plate to rotate, thereby driving the sealing cover to rotate and completing the threaded connection with the supporting body.

[0023] A battery box comprises a bottom guard plate, a side beam frame, a battery cover plate, an intermediate beam and a battery box exhaust structure, wherein the side beam frame is assembled around the edge of the bottom guard plate to form a battery compartment, the battery cover plate is covered in the battery compartment, the intermediate beam is arranged in the battery compartment and fixedly connected to the bottom guard plate, the battery cover plate is provided with a through hole, and the sealing cover portion is passed through the through hole and connected to a supporting body on the intermediate beam.

[0024] By adopting the above scheme, the exhaust effect can be achieved through the side air inlet holes and exhaust holes of the support body in the battery box fully encapsulated with foam, thereby reducing bubbles under the battery cover, increasing the bonding area of ​​the battery cover, and improving the overall strength of the battery pack; at the same time, the support body also plays a role in supporting the battery cover, reducing the components for fixing the battery cover, thereby reducing the parts cost.

[0025] Furthermore, more than two supporting bodies are arranged on the middle beam, and each supporting body corresponds to a through hole and a sealing cover.

[0026] By adopting the above solution, gas discharge from multiple locations after the battery compartment is filled with foam glue can be completed.

[0027] In summary, the battery box exhaust structure and battery box provided by the utility model have the following technical effects:

[0028] 1. After the foam glue is filled in the battery box, the bubbles generated by the foam glue can enter the exhaust cavity through the side air inlet of the supporting body, and then be discharged through the exhaust hole of the sealing cover, thereby avoiding the problem of cavitation in the battery box due to the inability to discharge gas. This not only improves the sealing performance of the battery box, but also enhances the overall strength of the battery pack;

[0029] 2. When the foaming glue gas is exhausted or no gas is produced, the foaming glue will enter the side air inlet of the support body, thereby blocking the side air inlet and part of the exhaust cavity, thereby achieving a closed space inside the battery box;

[0030] 3. Since the battery case exhaust structure can effectively discharge internal gas, it reduces bubbles in the battery case, reduces the space occupied by the battery case, makes the battery case airtight and waterproof, and enhances the structural stability and impact resistance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a partial explosion structure of an embodiment of the utility model;

[0032] Figure 2 It is a schematic diagram of the exploded cross-sectional structure of an embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of a partial explosion structure of a battery box according to an embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the internal structure of a battery box according to an embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of the assembly of the exhaust structure in the battery box according to an embodiment of the utility model.

[0036] Among them, the meanings of the figure marks are as follows: 1. Support body; 11. Exhaust cavity; 111. Cavity; 112. Sealing cavity; 113. Connecting cavity; 1131. Internal thread; 114. Side air inlet; 12. Lip plate; 121. Sealing groove; 122. Sealing member; 13. Assembly platform; 131. Glue layer; 2. Sealing cover; 21. Sealing section; 211. Annular groove; 212. Sealing ring; 22. Fixed section; 221. External thread; 23. Operating section; 231. Cover plate; 232. Boss; 233. Operating flat position; 24. Exhaust hole; 3. Middle beam; 4. Battery cover plate; 41. Perforation; 5. Bottom guard plate; 6. Side beam frame; 7. Battery compartment. DETAILED DESCRIPTION

[0037] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] Embodiment 1 of the present utility model is referred to Figure 1 , Figure 2 and Figure 5As shown, a battery box exhaust structure is disclosed, including a support body 1 and a sealing cover 2, the support body 1 has an exhaust cavity 11, one end of the support body 1 is used to connect with the bottom wall of the cavity in the battery box, of course, the bottom wall of the cavity in the battery box can also be provided with an intermediate beam 3, one end of the support body 1 can also be selected to be connected with the intermediate beam 3, the intermediate beam 3 is hollow inside to reduce its own gravity, the side wall of the support body 1 is provided with a side air inlet 114 connected with the exhaust cavity 11, the side air inlet 114 is connected with the cavity of the battery box, and is used to inhale the gas generated by the foam glue filled in the battery box The sealing cover 2 is sealed and assembled with the other end of the supporting body 1, and is used to assemble and connect the supporting body 1 and the sealing cover 2 on the battery cover plate 4 of the battery box. The sealing cover 2 is provided with an exhaust hole 24 connected with the exhaust cavity 11. The exhaust hole 24 is connected with the outside of the cavity of the battery box, and is used to discharge the gas entering the exhaust cavity 11 from the side air inlet hole 114. Since the gas generated by foaming can enter the exhaust cavity 11 from the side air inlet hole 114 and then be discharged through the exhaust hole 24 of the sealing cover 2, the problem that the inside of the battery box fully encapsulated with foam glue cannot be vented due to being sealed is solved, thereby reducing the cavitation in the battery box.

[0042] In some embodiments, in order to increase the contact area between the support body 1 and the battery cover 4, a lip plate 12 extending outward from the exhaust hole 24 is provided at the other end of the support body 1, and a sealing groove 121 surrounding the exhaust hole 24 is provided on the surface of the lip plate 12 facing the sealing cover 2, and a sealing member 122 is provided in the sealing groove 121. The design of the lip plate 12 and the sealing groove 121 increases the support area between the support body 1 and the battery cover, and improves the connection stability between the sealing cover 2 passing through the battery cover and the support body 1. Preferably, the sealing member 122 is made of sealing foam, and the presence of the sealing foam plays a certain buffering role, which can reduce the risk of damage caused by vibration or impact.

[0043] In order to improve the connection stability and air tightness between the sealing cover 2 and the supporting body 1, in this embodiment 1, the sealing cover 2 includes a sealing section 21, a fixing section 22 and an operating section 23 from one end to the other end, and the exhaust cavity 11 of the supporting body 1 includes a cavity 111, a sealing cavity 112 and a connecting cavity 113 from one end to the other end. Therefore, when the sealing cover 2 is assembled into the exhaust cavity 11, the sealing section 21 corresponds to the sealing cavity 112, and the fixing section 22 corresponds to the connecting cavity 113. Specifically, an annular groove 211 is provided in the circumference of the sealing section 21, and a sealing ring 212 is provided in the annular groove 211. The sealing ring 212 is preferably an O-ring, and the sealing ring 212 abuts against the cavity wall of the sealing cavity 112; an external thread 221 is provided in the circumference of the fixing section 22, and the connecting cavity 113 is provided in the circumference of the fixing section 22. The cavity 113 is provided with an internal thread 1131 for connecting with the external thread 221 of the fixing section 22; the operating section 23 includes a cover plate 231, and the cover plate 231 abuts against the lip plate 12; one end of the cavity 111 abuts against the middle beam 3, and the side air inlet 114 is circumferentially arranged at the other end of the cavity 111. Thus, the sealing section 21 can ensure the sealing effect between the sealing cover 2 and the support body 1, and can achieve the connection and fixing effect between the sealing cover 2 and the support body 1. The operating section 23 facilitates the operation of the sealing cover 2, so as to complete the threaded connection between the fixing section 22 and the connecting cavity 113 of the support body 1, and can complete the connection and fixing of the two, and is convenient for disassembly. The sealing cavity 112 can be sealed with the sealing section 21, and the air tightness of the connection between the cavity 111 and the exhaust cavity 11 and the side exhaust cavity 11 is ensured.

[0044] It should be noted that, in the present embodiment 1, the cavity wall diameter of the sealing cavity 112 is equal to the cavity wall diameter of the cavity 111, and the cavity wall diameter of the connecting cavity 113 is larger than the cavity wall diameter of the sealing cavity 112. The sealing cover 2 can be smoothly inserted into the exhaust cavity 11, which is beneficial to the assembly between the sealing cover 2 and the support body 1.

[0045] In order to improve the assembly stability of the support body 1, in some embodiments, one end of the support body 1 is provided with an assembly platform 13 extending outside the exhaust cavity 11, and the assembly platform 13 is connected to the middle beam 3 in a close fit. Preferably, the support platform is in a bevel or arc transition shape, which is conducive to improving the support stability between the support body 1 and the middle beam 3. An adhesive layer 131 is provided between the edge of the assembly platform 13 and the middle beam 3, which improves the connection stability and air tightness between the support body 1 and the assembly platform 13. In this way, the contact area between the support body 1 and the assembly platform 13 can be increased, thereby improving the support stability of the support body 1, and then improving its own strength.

[0046] In some embodiments, optionally, a boss 232 is provided on the surface of the cover plate 231 away from the exhaust chamber 11, and the boss 232 is provided with an operating flat position 233. The operating flat position 233 is conducive to the user driving the cover plate 231 to rotate, thereby driving the sealing cover 2 to rotate and completing the threaded connection with the support body 1. There are more than two operating flat positions 233, so that the boss 232 is imaged as a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc. with rounded corners. In other embodiments, the boss 232 can also be in the shape of a straight line, a cross, a plum blossom, or a column with anti-slip grooves on the edge, which can be convenient for user operation.

[0047] See also Figure 3-Figure 5 As shown, the utility model also relates to a battery box, including a bottom guard plate 5, a side beam frame 6, a battery cover plate 4, an intermediate beam 3 and a battery box exhaust structure, the side beam frame 6 surrounds the edge of the bottom guard plate 5 to assemble to form a battery compartment 7, the battery cover plate 4 is covered in the battery compartment 7, the intermediate beam 3 is arranged in the battery compartment 7 and is fixedly connected to the bottom guard plate 5, the battery cover plate 4 is provided with a through hole 41, the sealing cover 2 is partially penetrated through the through hole 41 and connected to the support body 1 on the intermediate beam 3. More than two support bodies 1 are arranged on the intermediate beam 3, and each support body 1 corresponds to a through hole 41 and a sealing cover 2. In the present embodiment 1, the number of the supporting body 1, the perforation 41 and the sealing cover 2 are all two. According to this arrangement, the side air inlet 114 and the exhaust hole 24 of the supporting body 1 can be used to exhaust the gas in the battery box fully encapsulated with foam glue, thereby reducing the bubbles under the battery cover 4, increasing the bonding area of ​​the battery cover 4, and improving the overall strength of the battery pack; at the same time, the supporting body 1 also plays the role of supporting the battery cover 4, reducing the components for fixing the battery cover 4, thereby reducing the parts cost.

[0048] It should be noted that, in other embodiments, the number of intermediate beams 3 can be increased to increase the assembly quantity of the support body 1, and the gas discharge at multiple locations after the battery compartment 7 is filled with foam glue can be completed, thereby increasing the exhaust volume of the filled foam glue, which can be increased or decreased according to actual conditions.

[0049] In summary, the battery box exhaust structure and battery box provided by the utility model have the following technical effects:

[0050] 1. After the foam glue is filled in the battery box, the bubbles generated by the foam glue can enter the exhaust cavity 11 through the side air inlet of the support body 1, and then be discharged through the exhaust hole 24 of the sealing cover 2, thereby avoiding the problem of cavitation in the battery box due to the inability to discharge gas, which not only improves the sealing performance of the battery box, but also enhances the overall strength of the battery pack;

[0051] 2. When the foaming glue gas is exhausted or no gas is produced, the foaming glue will enter the side air inlet of the support body 1, thereby blocking the side air inlet and part of the exhaust cavity 11, thereby achieving a closed space inside the battery box;

[0052] 3. Since the battery case exhaust structure can effectively discharge internal gas, it reduces bubbles in the battery case, reduces the space occupied by the battery case, makes the battery case airtight and waterproof, and enhances the structural stability and impact resistance of the battery pack.

[0053] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery box exhaust structure, characterized in that: include: A support body (1), the support body (1) having an exhaust cavity (11), one end of the support body (1) being used to be connected to the bottom wall of the cavity of a battery box, a side wall of the support body (1) being provided with a side air inlet (114) communicating with the exhaust cavity (11), and the side air inlet (114) being communicated with the cavity of the battery box; A sealing cover (2), the sealing cover (2) being sealingly assembled with the other end of the supporting body (1), the sealing cover (2) being provided with an exhaust hole (24) communicating with the exhaust cavity (11), and the exhaust hole (24) being communicating with the outside of the cavity of the battery box.

2. A battery box exhaust structure according to claim 1, characterized in that: The other end of the support body (1) is provided with a lip plate (12) extending outward from the exhaust hole (24); a surface of the lip plate (12) facing the sealing cover (2) is provided with a sealing groove (121) surrounding the exhaust hole (24); a sealing member (122) is provided in the sealing groove (121).

3. A battery box exhaust structure according to claim 2, characterized in that: The sealing cover (2) comprises, from one end to the other end: A sealing section (21), wherein an annular groove (211) is provided in the circumference of the sealing section (21), a sealing ring (212) is provided in the annular groove (211), and the sealing ring (212) abuts against a cavity wall of the exhaust cavity (11); A fixing section (22), wherein the fixing section (22) is provided with an external thread (221) in the circumferential direction; An operating section (23), wherein the operating section (23) comprises a cover plate (231), wherein the cover plate (231) abuts against the lip plate (12).

4. A battery box exhaust structure according to claim 3, characterized in that: The exhaust cavity (11) of the support body (1) comprises, from one end to the other, the following components: A cavity (111), one end of the cavity (111) abutting against a middle beam (3) of a cavity bottom wall in the battery box, and the side air inlet hole (114) being circumferentially arranged at the other end of the cavity (111); A sealing cavity (112), wherein the sealing cavity (112) is sealingly connected to a sealing ring (212) of the sealing section (21); A connecting cavity (113), wherein the connecting cavity (113) is provided with an internal thread (1131) for connecting to the external thread (221) of the fixing section (22).

5. A battery box exhaust structure according to claim 4, characterized in that: The diameter of the cavity wall of the sealed cavity (112) is equal to the diameter of the cavity wall of the cavity (111), and the diameter of the cavity wall of the connecting cavity (113) is greater than the diameter of the cavity wall of the sealed cavity (112).

6. A battery box exhaust structure according to any one of claims 1 to 5, characterized in that: One end of the support body (1) is provided with an assembly platform (13) extending outward from the exhaust cavity (11); the assembly platform (13) is fitted and connected to the middle beam (3) of the cavity bottom wall in the battery box.

7. A battery box exhaust structure according to claim 6, characterized in that: A glue layer (131) is provided between the edge of the assembly platform (13) and the middle beam (3).

8. A battery box exhaust structure according to claim 3, characterized in that: A boss (232) is provided on the surface of the cover plate (231) away from the exhaust chamber (11), and the boss (232) is provided with an operating flat position (233).

9. A battery box, characterized in that: The invention comprises a bottom guard plate (5), a side beam frame (6), a battery cover plate (4), an intermediate beam (3) and a battery box exhaust structure as described in any one of claims 1 to 8, wherein the side beam frame (6) surrounds the edge of the bottom guard plate (5) to form a battery compartment (7), the battery cover plate (4) is covered in the battery compartment (7), the intermediate beam (3) is arranged in the battery compartment (7) and is fixedly connected to the bottom guard plate (5), the battery cover plate (4) is provided with a through hole (41), and the sealing cover (2) is partially passed through the through hole (41) and connected to the supporting body (1) on the intermediate beam (3).

10. A battery box according to claim 9, characterized in that: More than two supporting bodies (1) are arranged on the middle beam (3), and each supporting body (1) corresponds to a through hole (41) and a sealing cover (2).

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