Sealing reinforcing structure and battery pack with same

Abstract

The utility model discloses a sealing reinforcing structure and a battery pack with the sealing reinforcing structure, the sealing reinforcing structure is used for auxiliary sealing of an upper shell and a lower shell of the battery pack, the sealing reinforcing structure comprises a supporting frame, the supporting frame is provided with a first supporting part and a second supporting part which are oppositely arranged in the vertical direction, the first supporting part is configured to abut against one of an upper shell and a lower shell of the battery pack; the elastic piece can stretch out and draw back in the vertical direction, and one end of the elastic piece is fixedly connected with the second supporting part; the pressing piece is connected with the other end of the elastic piece, the pressing piece is configured to abut against the other one of the upper shell and the lower shell of the battery pack, and in the vertical direction, the elastic piece is configured to be matched with the first supporting part to apply clamping force to the upper shell and the lower shell. According to the sealing reinforcing structure disclosed by the utility model, the battery pack can keep a stable, reliable and effective sealing effect in a long-term use process, so that the battery pack can operate more stably and reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a sealing reinforcement structure and a battery pack having the same. Background Art

[0002] For some special vehicles, such as racing cars and sports cars, there is often a need for short-time high-power discharge of the battery pack, which causes the battery cells and electronic components in the battery pack to release a large amount of heat in a short time, and the temperature rises sharply. Therefore, the battery pack usually adopts an immersion cooling scheme to ensure the stable operation of the battery pack.

[0003] Since the battery modules and electrical components in the battery pack are immersed in the oil, the battery pack needs to have a good sealing effect to avoid oil leakage. However, due to the existence of the oil in the battery pack, the oil always has a pressure effect on the upper and lower shells of the battery pack, so that during the long-term use of the battery pack, as the torque of the fastening bolts for fixing the upper and lower shells decays, the sealing effect between the upper and lower shells decreases under the action of the oil pressure and oil leakage occurs, thus reducing the operation stability and reliability of the battery pack. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a sealing reinforcement structure, which can assist the fastening bolts to fasten the upper and lower shells of the battery pack, so that the upper and lower shells can always maintain a stable and reliable sealing effect, and thus the battery pack can operate stably and reliably for a long time.

[0005] The utility model also provides a battery pack having the above sealing reinforcement structure.

[0006] According to the sealing reinforcement structure of the first aspect of the utility model, it is used for auxiliary sealing of the upper and lower shells of the battery pack. The sealing reinforcement structure includes: a support frame, the support frame having a first support portion and a second support portion arranged oppositely in the up-down direction, the first support portion being configured to abut against one of the upper and lower shells of the battery pack; an elastic member, the elastic member being telescopic in the up-down direction, one end of the elastic member being fixedly connected to the second support portion; a pressing member, the pressing member being connected to the other end of the elastic member, the pressing member being configured to abut against the other of the upper and lower shells of the battery pack. In the up-down direction, the elastic member is configured to cooperate with the first support portion to apply a clamping force to the upper and lower shells.

[0007] According to the sealing reinforcement structure of the present utility model, by providing a support frame and an elastic member, one end of the elastic member is connected to the second support portion of the support frame and the other end is connected to the pressing member. The elastic member is configured to cooperate with the first support portion of the support frame to apply a clamping force to the upper and lower cases of the battery pack, so that the battery pack can maintain a stable, reliable and effective sealing effect during long-term use, thereby enabling the battery pack to operate more stably and reliably.

[0008] In some embodiments of the present utility model, the first support portion is located below the second support portion, and the first support portion has a first abutting surface, which is configured to abut against the lower side surface of the lower case.

[0009] In some embodiments of the present utility model, a second abutting surface is formed on the surface of the pressing member facing away from the elastic member, and the second abutting surface is configured to abut against the upper side surface of the upper case.

[0010] In some embodiments of the present utility model, the elastic member has an avoidance cavity extending in the up and down direction, and the pressing member is provided with a first avoidance hole. The avoidance cavity is communicated with the first avoidance hole, and the avoidance cavity and the first avoidance hole are configured to accommodate a fastener in the battery pack for fastening the upper case and the lower case.

[0011] In one embodiment of the present utility model, the avoidance cavity penetrates the elastic member in the up and down direction, and the second support portion is provided with a second avoidance hole, which is communicated with the avoidance cavity and the first avoidance hole.

[0012] In some embodiments of the present utility model, the support frame includes: a first support plate and a second support plate, the first support plate and the second support plate are arranged at intervals in the up and down direction and extend along a first direction, and the first support plate and the second support plate respectively form the first support portion and the second support portion; a connecting plate, the connecting plate extends in the up and down direction, and both ends of the connecting plate are respectively connected to the first support plate and the second support plate.

[0013] In one embodiment of the present utility model, the connecting plate is provided with a through hole extending in the up and down direction, and a part of the pressing member passes through the through hole along the first direction. The pressing member is a pressing sheet, the pressing member extends along the first direction, and the pressing member has a holding portion, which is located on the side of the connecting plate facing away from the elastic member.

[0014] In an embodiment of the present utility model, the sealing reinforcement structure further includes a guide rod, the guide rod extends in the up and down direction and is respectively connected to the first support plate and the second support plate at both ends, the pressing member is provided with a mating hole, and the guide rod passes through the mating hole.

[0015] In some embodiments of the present utility model, the elastic member is a spring.

[0016] The battery pack according to the second aspect of the present utility model includes: an upper housing and a lower housing, the upper housing and the lower housing are arranged in the up and down direction and are tightly connected by fasteners; the sealing reinforcement structure according to the first aspect of the present utility model, the sealing reinforcement structure cooperates with the fasteners to clamp and fix the upper housing and the lower housing.

[0017] In the battery pack according to the present utility model, by providing the sealing reinforcement structure of the first aspect above, the sealing reinforcement structure is provided with a support frame and an elastic member, one end of the elastic member is connected to the second support portion of the support frame and the other end is connected to the pressing member, and the elastic member is configured to cooperate with the first support portion of the support frame to apply a clamping force to the upper housing and the lower housing of the battery pack, so that the battery pack can maintain a stable, reliable and effective sealing effect during long-term use, thereby enabling the battery pack to operate more stably and reliably.

[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of the battery pack according to an embodiment of the present utility model from another angle;

[0021] Figure 3 is Figure 2 a sectional view taken along line A-A shown in

[0022] Figure 4 is Figure 3 a partially enlarged schematic diagram of the position B shown in

[0023] Figure 5 is a schematic diagram of the sealing reinforcement structure according to an embodiment of the present utility model;

[0024] Figure 6 is a schematic diagram of the sealing reinforcement structure according to an embodiment of the present utility model from another angle.

[0025] REFERENCE MARKS:

[0026] 10. Sealing reinforcement structure;

[0027] 11. Support frame; 111. First support plate; 112. Second support plate; 1121. Second avoidance hole; 113. Connecting plate;

[0028] 12. Elastic member; 13. Pressing member; 131. Holding portion; 132. First avoidance hole; 14. Guide rod;

[0029] 20. Upper housing; 30. Lower housing; 40. Fastener;

[0030] 100. Battery pack. Detailed implementation manners

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0032] First, refer to Figures 1-6 A brief description is given to the battery pack 100 according to the embodiment of the second aspect of the present utility model. The battery pack 100 adopts an immersion cooling scheme. The battery pack 100 includes an upper housing 20 and a lower housing 30. The upper housing 20 and the lower housing 30 are fixedly connected by a fastener 40 and cooperate with a sealing member to form a seal. The battery pack 100 includes a sealing reinforcement structure 10, and the sealing reinforcement structure 10 cooperates with the fastener 40 to clamp and fix the upper housing 20 and the lower housing 30.

[0033] As Figure 1 and Figure 4 shown, the sealing reinforcement structure 10 according to the embodiment of the first aspect of the present utility model includes: a support frame 11, an elastic member 12, and a pressing member 13. Specifically, the support frame 11 has a first support portion and a second support portion that are oppositely arranged in the up and down direction (such as the up and down direction shown in Figure 4 ). The first support portion is configured to abut against one of the upper housing 20 and the lower housing 30 of the battery pack 100; the elastic member 12 is telescopable in the up and down direction, and one end of the elastic member 12 is fixedly connected to the second support portion; the pressing member 13 is connected to the other end of the elastic member 12, and the pressing member 13 is configured to abut against the other of the upper housing 20 and the lower housing 30 of the battery pack 100. In the up and down direction, the elastic member 12 is configured to cooperate with the first support portion to apply a clamping force to the upper housing 20 and the lower housing 30.

[0034] In this embodiment, the sealing and strengthening structure 10 includes a support frame 11, an elastic member 12, and a pressing member 13. The first support portion of the support frame 11 abuts against one of the upper housing 20 and the lower housing 30. For example, the first support portion of the support frame 11 can be in abutting cooperation with the upper housing 20, or the first support portion can also be in abutting cooperation with the lower housing 30. The elastic member 12 is connected to the second support portion and the pressing member 13, and the pressing member 13 abuts against the other of the upper housing 20 and the lower housing 30. When the sealing and strengthening structure 10 is assembled to the upper housing 20 and the lower housing 30 of the battery pack 100, the first support portion of the support frame 11 can abut against the upper housing 20 or the lower housing 30. The second support portion of the support frame 11 fixes and limits the elastic member 12 in the up-and-down direction, so that the elastic member 12 can apply a clamping force to the pressing member 13 in the up-and-down direction towards the lower housing 30 or the upper housing 20, so that the pressing member 13 can cooperate with the first support portion to press the upper housing 20 and the lower housing 30.

[0035] It can be understood that since the battery pack 100 is filled with oil, the oil always has a pressure on the upper housing 20 and the lower housing 30. The pressure of the oil causes the upper housing 20 and the lower housing 30 to form a separating force at the connection position. Therefore, the fastener 40 for fastening the upper housing 20 and the lower housing 30 needs to form a sufficient clamping force on the upper housing 20 and the lower housing 30 to resist the external force and the force caused by the internal oil during the use of the battery pack 100, so as to form a stable and reliable sealing structure between the upper housing 20 and the lower housing 30. However, with the long-term use of the battery pack 100, the torque of the fastener 40 on the upper housing 20 and the lower housing 30 will gradually decay, resulting in a decrease or even failure of the sealing effect of the battery pack 100, and a decrease in the operating stability and reliability of the battery pack 100.

[0036] In this embodiment, the sealing and strengthening structure 10 applies pressure to the pressing member 13 through the elastic member 12, so that the pressing member 13 and the first support portion can form a pressing force on the upper housing 20 and the lower housing 30. Thus, during the long-term use of the battery pack 100, the clamping force formed by the sealing and strengthening structure 10 on the upper housing 20 and the lower housing 30 can stably and reliably make up for the torque decay of the fastener 40. Therefore, the sealing and strengthening structure 10 can play a very good role in sealing and strengthening the sealing and fastening of the fastener 40 on the upper housing 20 and the lower housing 30, so that the battery pack 100 can always maintain a stable and effective sealing effect, and the operating stability and reliability of the battery pack 100 are better.

[0037] According to the sealing reinforcement structure 10 of the embodiment of the present utility model, by providing a support frame 11 and an elastic member 12, one end of the elastic member 12 is connected to the second support portion of the support frame 11 and the other end is connected to the pressing member 13. The elastic member 12 is configured to cooperate with the first support portion of the support frame 11 to apply a clamping force to the upper housing 20 and the lower housing 30 of the battery pack 100, so that the battery pack 100 can maintain a stable, reliable and effective sealing effect during long-term use, thereby enabling the battery pack 100 to operate more stably and reliably.

[0038] In some embodiments of the present utility model, referring to Figure 4 and Figure 5 as shown, the first support portion may be located below the second support portion. The first support portion may have a first abutting surface configured to abut against the lower side surface of the lower housing 30.

[0039] In this embodiment, the first support portion is provided with the first abutting surface to abut against the lower side surface of the lower housing 30, and the structure is simple, enabling the first support portion to have a stable and reliable abutting mating surface with the lower housing 30. Thus, when the sealing reinforcement structure 10 clamps and fixes the upper housing 20 and the lower housing 30, the first support portion can stably and reliably abut and fix with the lower housing 30, so that the elastic member 12 can cooperate with the pressing member 13 to stably and reliably clamp and fix towards the upper housing 20, making it more convenient and easy to assemble the sealing reinforcement structure 10 with the upper housing 20 and the lower housing 30.

[0040] In some embodiments of the present utility model, referring to Figure 4 and Figure 5 as shown, a second abutting surface may be formed on the surface of the pressing member 13 facing away from the elastic member 12, and the second abutting surface is configured to abut against the upper side surface of the upper housing 20.

[0041] In this embodiment, the pressing member 13 is formed with the second abutting surface to abut against the upper side surface of the upper housing 20, and the structure is simple, enabling the pressing member 13 to form a stable and reliable abutting mating surface with the upper housing 20. Thus, the pressing member 13 and the first support portion can stably and reliably clamp and fix the upper housing 20 and the lower housing 30 through the compression deformation of the elastic member 12 in the up and down direction, and it is more convenient and easy to assemble the sealing reinforcement structure 10 with the upper housing 20 and the lower housing 30.

[0042] In some embodiments of the present utility model, referring to Figure 4 as shown, the elastic member 12 may have an avoidance cavity extending in the up and down direction. The pressing member 13 is provided with a first avoidance hole 132, and the avoidance cavity is communicated with the first avoidance hole 132. The avoidance cavity and the first avoidance hole 132 are configured to accommodate a fastener 40 in the battery pack 100 for fastening the upper housing 20 and the lower housing 30.

[0043] In this embodiment, the elastic member 12 is provided with an avoidance cavity, and the pressing member 13 is provided with a first avoidance hole 132. When the sealing and strengthening structure 10 is assembled to the upper housing 20 and the lower housing 30, the pressing member 13 and the elastic member 12 can be arranged at the fastener 40 of the battery pack 100. Specifically, the fastener 40 can be located in the first avoidance hole 132 of the pressing member 13 and the avoidance cavity of the elastic member 12 in the up-down direction, so that the sealing and strengthening structure 10 can cooperate with the fastener 40 in the circumferential direction of the fastener 40 to clamp and fix the upper housing 20 and the lower housing 30, so that the sealing and strengthening structure 10 can cooperate well with the fastener 40 to fasten and connect the upper housing 20 so that the upper housing 20 and the lower housing 30 are stably and reliably sealed.

[0044] The sealing and strengthening structure 10 and the fastener 40 are arranged at the same position of the battery pack 100, making the overall structure of the battery pack 100 more compact and simple. The fastener 40 can play a role in limiting and fixing the pressing member 13 and the elastic member 12 to make the pressing member 13 and the elastic member 12 stably press and fix on the upper housing 20, so that to a certain extent, the sealing and strengthening structure 10 can be stably assembled into the battery pack 100. Of course, the sealing and strengthening structure 10 can also be arranged at other positions, such as between adjacent fasteners 40, which can also achieve the effect of sealing and strengthening.

[0045] In an embodiment of the present invention, referring to Figure 4 and Figure 6 as shown, the avoidance cavity can penetrate the elastic member 12 in the up-down direction, and the second support portion is provided with a second avoidance hole 1121, and the second avoidance hole 1121 communicates with the avoidance cavity and the first avoidance hole 132.

[0046] In this embodiment, the second avoidance hole 1121 is provided in the second asset portion, and the second avoidance hole 1121 communicates with the avoidance cavity and the first avoidance hole 132, which can enable the fastener 40 to conveniently extend from the outside into the position of the upper housing 20 and the lower housing 30 in the up-down direction for fastening operations when the battery pack 100 is assembled or disassembled, or enable the disassembly tool to extend into the avoidance cavity from the second avoidance hole 1121 to remove the fastener 40.

[0047] When the battery pack 100 is assembled, the sealing and strengthening structure 10 can pre-clamp and fix the upper housing 20 and the lower housing 30, and then the fastener 40 passes through the second avoidance hole 1121, the avoidance cavity and the first avoidance hole 132 to fasten and connect the upper housing 20 and the lower housing 30, so that it can play a role in pre-fixing the upper housing 20 and the lower housing 30, and can avoid the pressing member 13 from lifting a large distance towards the elastic member 12 to avoid the protruding part of the fastener 40 on the upper side surface of the upper housing 20, so that it is more convenient and easy to assemble the sealing and strengthening structure 10 onto the upper housing 20 and the lower housing 30.

[0048] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the support frame 11 may include: a first support plate 111, a second support plate 112 and a connecting plate 113, the first support plate 111 and the second support plate 112 are arranged in a vertical direction and spaced apart from each other and along a first direction (such as Figure 4 The first support plate 111 and the second support plate 112 respectively form a first support portion and a second support portion; the connecting plate 113 extends in the up-down direction, and both ends of the connecting plate 113 are respectively connected to the first support plate 111 and the second support plate 112.

[0049] In this embodiment, the first support plate 111 forms a first support portion, and the second support plate 112 forms a second support portion. When the sealing reinforcement structure 10 is assembled to the upper shell 20 and the lower shell 30, the elastic member 12 and the pressing member 13 are arranged between the first support plate 111 and the second support plate 112. The second support plate 112 cooperates with the connecting plate 113 and the first support plate 111 to support and fix the elastic member 12. The support frame 11 is provided with the first support plate 111, the second support plate 112 and the connecting plate 113. The connecting plate 113 extends in the up-down direction and the two ends are respectively connected to the first support plate 111 and the second support plate 112. The structure is simple and can well meet the needs of the elastic member 12 and the pressing member 13 to press and fix the upper shell 20.

[0050] In one embodiment of the present invention, Figure 4 As shown, in the first direction, the connecting plate 113 can be arranged on the outside of the upper shell 20 and the lower shell 30, so that the first support plate 111 and the second support plate 112 can be conveniently extended to the upper and lower sides of the upper shell 20 and the lower shell 30 along the first direction, thereby making it easier to clamp and assemble the sealing reinforcement structure 10 with the upper shell 20 and the lower shell 30.

[0051] In one embodiment of the present invention, reference Figure 4 and Figure 5 As shown, the connecting plate 113 may be provided with a through hole extending in the up-down direction, the clamping member 13 partially passes through the through hole in the first direction, the clamping member 13 is a clamping sheet, the clamping member 13 extends in the first direction, and the clamping member 13 has a holding portion 131, which is located on the side of the connecting plate 113 facing away from the elastic member 12.

[0052] In this embodiment, a through hole is provided in the connecting plate 113. The through hole extends in the up and down direction. The pressing member 13 partially passes through the through hole along the first direction away from the elastic member 12 to form a holding portion 131. That is, the holding portion 131 is arranged on the outer sides of the upper housing 20 and the lower housing 30. When the sealing and strengthening structure 10 is assembled onto the upper housing 20 and the lower housing 30, the assembler can grasp the holding portion 131 to control the upward or downward movement of the pressing member 13, so that the distance between the pressing member 13 and the first supporting portion can reach or exceed the overall thickness of the upper housing 20 and the lower housing 30 at the connecting position. Thus, the sealing and strengthening structure 10 can be moved to a preset clamping and fixing position, so that the second abutting surface of the pressing member 13 abuts against the upper side surface of the upper housing 20 and the first abutting surface of the first supporting portion abuts against the lower side surface of the lower housing 30. When the assembler releases the pressing member 13, the pressing member 13 can cooperate with the first supporting portion under the pressing action of the elastic member 12 to clamp and fix the upper housing 20 and the lower housing 30.

[0053] In this embodiment, a through hole is provided in the connecting plate 113, and the holding portion 131 is located on the side of the connecting plate 113 away from the elastic member 12, which is convenient for the assembler to externally control the holding portion 131 for assembly operations and can well meet the need for the up and down movement of the pressing member 13. In this embodiment, the pressing member 13 is set as a pressing piece, with a simple structure and can well meet the use requirements.

[0054] In an embodiment of the present utility model, as Figure 4 shown, the sealing and strengthening structure 10 may further include a guide rod 14. The guide rod 14 extends in the up and down direction and is respectively connected to the first support plate 111 and the second support plate 112 at both ends. The pressing member 13 is provided with a mating hole, and the guide rod 14 passes through the mating hole.

[0055] In this embodiment, the sealing and strengthening structure 10 is provided with the guide rod 14, the pressing member 13 is provided with a mating hole, and the guide rod 14 passes through the mating hole. The structure is simple. The guide rod 14 can play a good guiding role in the up and down movement of the pressing member 13, so that the pressing member 13 can move stably and reliably in the up and down direction. Thus, the overall structural stability of the sealing and strengthening structure 10 is better when assembled with the upper housing 20 and the lower housing 30, and the assembly is more convenient and easy. The guide rod 14 is connected to the first support plate 111 and the second support plate 112, which can, to a certain extent, make the overall structural strength of the support frame 11 and the guide rod 14 better, so that the elastic member 12 and the pressing member 13 can be more stably and reliably supported and fixed and can stably perform the clamping operation.

[0056] In some examples of the present utility model, as Figure 4As shown, in the first direction, the guide rod 14 can be arranged on the side of the connecting plate 113 facing the elastic member 12, so that the guide rod 14 and the elastic member 12 can be at a relatively close distance, so that the part of the pressing member 13 connected to the elastic member 12 can obtain a better guiding effect, and the pressing member 13 can move more stably in the up and down direction.

[0057] In some embodiments of the present invention, the elastic member 12 and the second support portion and the pressing member 13 can be connected by snap connection. In this way, the elastic member 12 can be stably and reliably fixed between the second support portion and the pressing member 13, so that the elastic member 12 can stably and reliably apply an elastic force to the pressing member 13, and the elastic member 12 and the pressing member 13 cooperate to stably press the upper housing 20. Exemplarily, the second support portion and the pressing member 13 can both be provided with card slots, and both ends of the elastic member 12 are snap-fitted and fixed in the card slots.

[0058] In some embodiments of the present invention, the elastic member 12 can be a spring. In this embodiment, the elastic member 12 is set as a spring, which has a simple structure and can well meet the use requirements. Exemplarily, the elastic member 12 can be a helical spring.

[0059] Next, refer to Figures 1-6 to describe the battery pack 100 according to the embodiment of the second aspect of the present invention.

[0060] As Figures 1-6 shown, the battery pack 100 according to the embodiment of the present invention includes: an upper housing 20, a lower housing 30, and a sealing and strengthening structure 10 according to the embodiment of the first aspect of the present invention. The upper housing 20 and the lower housing 30 are arranged in the up and down direction and are fixedly connected by a fastener 40; the sealing and strengthening structure 10 cooperates with the fastener 40 to clamp and fix the upper housing 20 and the lower housing 30.

[0061] Other components and operations of the battery pack 100 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0062] For the battery pack 100 according to the embodiment of the present invention, by providing the sealing and strengthening structure 10 of the above-mentioned first aspect embodiment, the sealing and strengthening structure 10 is provided with a support frame 11 and an elastic member 12. One end of the elastic member 12 is connected to the second support portion of the support frame 11 and the other end is connected to the pressing member 13. The elastic member 12 is configured to cooperate with the first support portion of the support frame 11 to apply a clamping force to the upper housing 20 and the lower housing 30 of the battery pack 100, so that the battery pack 100 can maintain a stable, reliable and effective sealing effect during long-term use, so that the battery pack 100 can operate more stably and reliably.

[0063] Next, it will be referred to Figures 1-6Describe the battery pack 100 according to a specific embodiment of the present utility model.

[0064] As Figures 1-6 shown, the battery pack 100 includes an upper housing 20, a lower housing 30, a fastener 40, a seal, and a seal strengthening structure 10.

[0065] The upper housing 20 and the lower housing 30 are fixedly connected by the fastener 40. The fastener 40 is a bolt, and the number of the fasteners 40 can be multiple. The multiple fasteners 40 are arranged at intervals along the circumferential direction of the battery pack 100. Specifically, the upper housing 20 can be formed with assembly holes, and the lower housing 30 can be provided with threaded holes corresponding to the assembly holes in the up-down direction. The fastener 40 can pass through the assembly holes and be threadedly connected to the threaded holes, so that the upper housing 20 and the lower housing 30 are fixedly connected. A seal is provided between the upper housing 20 and the lower housing 30 for sealing. The seal can be an O-ring. The upper housing 20 and the lower housing 30 are fixedly connected by the fastener 40, so that the upper housing 20 and the lower housing 30 can be closely attached to the seal, enabling the seal to play a stable, reliable and effective sealing role.

[0066] The seal strengthening structure 10 includes a support frame 11, an elastic member 12, a pressing member 13, and a guide rod 14. The support frame 11 includes a first support plate 111, a second support plate 112, and a connecting plate 113. The first support plate 111 is disposed on the lower side of the lower housing 30 and abuts against the lower housing 30. The second support plate 112 is disposed on the upper side of the upper housing 20. The connecting plate 113 is disposed on the outer side of the upper housing 20 and the lower housing 30 in the first direction and extends in the up-down direction. The two ends of the connecting plate 113 are respectively connected to the first support plate 111 and the second support plate 112. The guide rod 14 is disposed on the side of the connecting plate 113 facing the upper housing 20 and the lower housing 30.

[0067] The connecting plate 113 is provided with a through hole, and the pressing member 13 includes a gripping portion 131, and the gripping portion 131 is located on the side of the connecting plate 113 away from the elastic member 12. The pressing member 13 passes through the through hole, and the pressing member 13 is arranged between the second support plate 112 and the upper shell 20 and abuts against the upper shell 20. The elastic member 12 is connected between the second support plate 112 and the pressing member 13. The elastic member 12 is a spring and is in a compressed state after assembly to apply elastic force to the pressing member 13. The pressing member 13 is a pressing sheet. The pressing member 13 is provided with a first avoidance hole 132, and the second support plate 112 is provided with a second avoidance hole 1121. The elastic member 12 has an avoidance cavity, and the first avoidance hole 132 is connected with the second avoidance hole 1121 and the avoidance cavity in the up and down directions. In this embodiment, the support frame 11 and the guide rod 14, the pressing sheet and the elastic member 12 can all be metal parts. When the sealing reinforcement structure 10 is not assembled to the upper shell 20, the elastic member 12 can also be set to be in a certain degree of compression state, so that the clamping member 13 can be abutted and fixed with the first support plate 111, so that the sealing reinforcement structure 10 can maintain a stable structural state for easy access.

[0068] When the sealing reinforcement structure 10 is assembled to the upper shell 20 and the lower shell 30, the assembler can lift the clamping piece 13 according to the thickness of the upper shell 20 and the lower shell 30 of the battery pack 100 at the connection position to fix the sealing reinforcement structure 10 to the upper shell 20 and the lower shell 30. The first avoidance hole 132 of the clamping piece 13 accommodates the flange surface of the fastener 40, and the elastic piece 12 presses the clamping piece 13 and the upper shell 20, so that the sealing reinforcement structure 10 is fixed on the upper shell 20 and the lower shell 30 as a whole and clamps the upper shell 20 and the lower shell 30. After the battery pack 100 has been subjected to various harsh tooling and long-term use for a long time, when the fastener 40 at some positions has torque attenuation, due to the presence of the sealing reinforcement structure 10, sufficient clamping force is still formed between the upper shell 20 and the lower shell 30 at this position, thereby ensuring that the oil inside the battery pack 100 is in a stable and reliable sealed environment, and oil leakage is well avoided, so that the operation stability and reliability of the battery pack 100 are better.

[0069] In this embodiment, a support frame 11 and an elastic member 12 are provided, one end of the elastic member 12 is connected to the second support portion of the support frame 11 and the other end is connected to the clamping member 13, and the elastic member 12 is configured to cooperate with the first support portion of the support frame 11 to apply a clamping force to the upper shell 20 and the lower shell 30 of the battery pack 100, so that the battery pack 100 can maintain a stable, reliable and effective sealing effect during long-term use, thereby allowing the battery pack 100 to operate more stably and reliably.

[0070] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model.

[0071] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0072] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0073] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0074] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A sealing and strengthening structure, characterized in that, For auxiliary sealing of the upper shell and the lower shell of a battery pack, the sealing reinforcement structure includes: A support frame, the support frame having a first support portion and a second support portion arranged oppositely in the up-and-down direction, the first support portion being configured to abut against one of the upper shell and the lower shell of the battery pack; An elastic member, the elastic member being telescopic in the up-and-down direction, one end of the elastic member being fixedly connected to the second support portion; A pressing member, the pressing member being connected to the other end of the elastic member, the pressing member being configured to abut against the other of the upper shell and the lower shell of the battery pack, in the up-and-down direction, the elastic member being configured to cooperate with the first support portion to apply a clamping force to the upper shell and the lower shell.

2. The sealing reinforcement structure according to claim 1, wherein The first support portion is located below the second support portion, the first support portion having a first abutting surface, the first abutting surface being configured to abut against the lower side surface of the lower shell.

3. The sealing reinforcement structure according to claim 1, wherein A second abutting surface is formed on a surface of the pressing member facing away from the elastic member, the second abutting surface being configured to abut against the upper side surface of the upper shell.

4. The sealing reinforcement structure according to claim 1, characterized in that, The elastic member has an avoidance cavity extending in the up-and-down direction, the pressing member being provided with a first avoidance hole, the avoidance cavity communicating with the first avoidance hole, the avoidance cavity and the first avoidance hole being configured to accommodate a fastener in the battery pack for fastening the upper shell and the lower shell.

5. The sealing reinforcement structure according to claim 4, characterized in that, The avoidance cavity penetrates through the elastic member in the up-and-down direction, the second support portion being provided with a second avoidance hole, the second avoidance hole communicating with the avoidance cavity and the first avoidance hole.

6. The sealing and strengthening structure according to any one of claims 1-5, characterized in that The support frame includes: A first support plate and a second support plate, the first support plate and the second support plate being spaced apart in the up-and-down direction and extending in a first direction, the first support plate and the second support plate respectively forming the first support portion and the second support portion; A connecting plate, the connecting plate extending in the up-and-down direction, two ends of the connecting plate being respectively connected to the first support plate and the second support plate.

7. The sealing reinforcement structure according to claim 6, characterized in that The connecting plate is provided with a through hole extending in the up-and-down direction, a part of the pressing member passing through the through hole in the first direction, the pressing member being a pressing sheet, the pressing member extending in the first direction, the pressing member having a holding portion located on a side of the connecting plate facing away from the elastic member.

8. The sealing reinforcement structure according to claim 6, characterized in that, Further included is a guide rod, the guide rod extending in the up-and-down direction and having two ends respectively connected to the first support plate and the second support plate, the pressing member being provided with a mating hole, the guide rod passing through the mating hole.

9. The sealing reinforcement structure according to any one of claims 1-5, characterized in that, The elastic member is a spring.

10. A battery pack, characterized in that, Including: An upper shell and a lower shell, the upper shell and the lower shell being arranged in the up-and-down direction and being fixedly connected by a fastener; The sealing reinforcement structure according to any one of claims 1-9, the sealing reinforcement structure cooperating with the fastener to clamp and fix the upper shell and the lower shell.

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