Waterproof battery structure and power battery

Abstract

This disclosure provides a waterproof battery structure and a power battery. The waterproof battery structure includes a hollow sealing bracket, a sealing block, a shell, a battery module, an end cap, and a waterproof buffer. The shell forms a receiving cavity, and the battery module is disposed within the receiving cavity. The hollow sealing bracket is sealed to the side wall of the receiving cavity via the sealing block. The end cap has a snap-fit ​​portion on the side facing the hollow sealing bracket, which is respectively snapped into the sealing block and the hollow sealing bracket, and seals against the end of the receiving cavity. The waterproof buffer is disposed between the snap-fit ​​portion and the battery module. This waterproof battery structure, due to the added waterproof buffer, ensures that the hollow sealing bracket and the battery module do not directly contact each other, and can also effectively buffer the vibration force of the battery module, effectively reducing the probability of the sealing block separating from the shell due to external vibration, thus ensuring that the waterproof battery structure can still achieve high waterproof performance under vibration conditions.

Description

Technical Field

[0001] This disclosure relates to the field of power battery technology, and in particular to a waterproof battery structure and a power battery. Background Technology

[0002] Lithium-ion batteries are a common type of power battery. When the battery modules inside a lithium-ion battery are exposed to moisture or water, short circuits can easily occur. Therefore, lithium-ion batteries need to be sealed to achieve waterproofing.

[0003] Currently, the sealing brackets of waterproof battery structures on the market have a large direct contact area with the battery module. For example, the waterproof battery casing and battery module disclosed in Chinese Patent Document No. CN220544105U (please refer to Figure 7 of that document) have a large direct contact area with the battery module because the sealing bracket is located on the top of the casing and completely covers the top of the battery module. When the lithium-ion battery is subjected to significant vibration during transportation or handling, and because the sealing block is located at the periphery of the sealing bracket, the battery module will experience micro-vibrations inside the casing, repeatedly colliding with the sealing bracket. This can cause the sealing block to easily separate from the casing, resulting in sealing and waterproofing failure. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a waterproof battery structure and power battery that can still achieve high waterproof performance under vibration conditions.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A waterproof battery structure includes a hollowed-out sealing bracket, a sealing block, a shell, a battery module, an end cap, and a waterproof buffer component;

[0007] The outer casing has a receiving cavity, and the battery module is disposed within the receiving cavity;

[0008] The hollow sealing bracket is sealed to the side wall of the accommodating cavity through the sealing block;

[0009] The end cap has a snap-fit ​​portion on the side facing the hollow sealing bracket. The snap-fit ​​portion is respectively fastened to the sealing block and the hollow sealing bracket, and seals against the end of the receiving cavity.

[0010] The waterproof buffer is disposed between the snap-fit ​​part and the battery module.

[0011] In one embodiment, the orthographic projection of the air-proof buffer cavity of the hollow sealing bracket is located on the waterproof buffer component.

[0012] In one embodiment, the waterproof cushioning element is any one of a silicone pad, a nitrile rubber pad, and a neoprene rubber pad.

[0013] In one embodiment, the hollow sealing bracket includes an annular sealing main frame and a blocking protrusion ring. A buffer cavity is formed in the middle of the annular sealing main frame. The annular sealing main frame is sleeved on the inner wall of the receiving cavity. The annular sealing main frame, the blocking protrusion ring, and the inner wall of the receiving cavity together form a filling groove. The sealing block is embedded in the filling groove. The blocking protrusion ring protrudes from one side of the annular sealing main frame.

[0014] The end cap includes a cover plate, a first retaining ring, and a second retaining ring. The first retaining ring and the second retaining ring are spaced apart on the side of the cover plate facing the battery module and together form the snap-fit ​​portion. A fastening groove is formed between the first retaining ring and the second retaining ring. The cover plate is fastened to the sealing block by the first retaining ring, and the cover plate is sealed and abuts against the end of the receiving cavity. The cover plate is also fastened to the anti-cavity buffer cavity by the second retaining ring, and the second retaining ring is movably abutting against the waterproof buffer component.

[0015] In one embodiment, the first side of the blocking protrusion forms the filling groove with the sidewall of the receiving cavity, and the second side of the blocking protrusion forms a residual adhesive groove with the second retaining ring, the residual adhesive groove communicating with the filling groove.

[0016] In one embodiment, the end cap further includes a reinforcing rib, the second retaining ring forming a cavity in the middle of the cover plate, and the reinforcing rib disposed within the cavity; and / or,

[0017] The width of the filling groove is greater than the width of the residual adhesive groove; and / or,

[0018] The hollow sealing bracket is a plastic hollow sealing bracket; and / or,

[0019] Multiple mounting slots are formed inside the air-sheltered buffer cavity, and each cell of the battery module is set in a one-to-one correspondence with each of the mounting slots.

[0020] In one embodiment, an installation groove is formed at the end of the accommodating cavity, the installation groove being adapted to the annular sealing main frame, and the annular sealing main frame being sleeved on the side wall of the installation groove.

[0021] In one embodiment, the waterproof battery structure further includes a locking element for securing the housing to the end cap.

[0022] In one embodiment, the locking element is a screw, the end cap has a through hole, the outer shell has a corresponding threaded hole, the screw passes through the through hole and the threaded hole in sequence, and is screwed to the inner wall of the threaded hole.

[0023] A power battery comprising the waterproof battery structure described in any of the above embodiments.

[0024] Compared with the prior art, this disclosure has at least the following advantages:

[0025] Because the end cap has a snap-fit ​​portion on the side facing the hollow sealing bracket, this snap-fit ​​portion is respectively fastened into the sealing block and the air-proof buffer cavity, so that the snap-fit ​​portion and the sealing block are fitted together, achieving a preliminary sealing and waterproofing effect between the end cap and the outer shell. Furthermore, the snap-fit ​​portion is fastened into the air-proof buffer cavity to achieve a secondary sealing and waterproofing effect between the snap-fit ​​portion and the hollow sealing bracket, thereby effectively ensuring the waterproofing effect of the waterproof battery structure. Also, because the waterproof buffer component is located between the snap-fit ​​portion and the battery module, the added waterproof buffer component prevents the hollow sealing bracket from colliding with the battery. The direct contact between the module and the waterproof buffer reduces the probability of the hollow sealing bracket vibrating with the waterproof buffer. On the other hand, the waterproof buffer can better buffer the vibration force of the battery module, effectively reducing the vibration force reaching the hollow sealing bracket, further reducing the probability of the hollow sealing bracket vibrating, and thus reducing the probability of the sealing block separating from the shell due to external vibration, thus better ensuring the sealing performance of the sealing block and the shell. In addition, the added waterproof buffer also achieves better waterproof performance for the battery module, thus effectively ensuring that the waterproof battery structure can still achieve high waterproof performance under vibration conditions. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a power battery in one direction according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 The image shown is a leaked picture of one direction of the power battery.

[0029] Figure 3 for Figure 1 A cross-sectional view of the power battery shown in one direction;

[0030] Figure 4 for Figure 3 A magnified view of the area shown at point A in the middle.

[0031] Reference numerals: 1. Power battery; 10. Waterproof battery structure; 100. Hollowed-out sealing bracket; 110. Annular sealing main frame; 111. Hollow-out buffer cavity; 120. Blocking protrusion ring; 130. Filling groove; 140. Residual adhesive groove; 200. Sealing block; 210. Insertion groove; 300. Waterproof buffer component; 400. Locking component; 500. Outer shell; 510. Mounting groove; 520. Receiving cavity; 600. End cap; 610. First retaining ring; 620. Second retaining ring; 630. Cover plate; 640. Hollow-out cavity; 700. Battery module; 710. Insulating gasket. Detailed Implementation

[0032] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Unless otherwise defined, 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 disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0036] Please refer to 1 to Figure 3One embodiment of the waterproof battery structure 10 includes a hollow sealing bracket 100, a sealing block 200, a housing 500, a battery module 700, an end cap 600, and a waterproof buffer 300. The housing 500 forms a receiving cavity 520, allowing the battery module 700 to be disposed within the receiving cavity 520. The hollow sealing bracket 100 is sealed to the side wall of the receiving cavity 520 via the sealing block 200, thereby achieving a sealed arrangement between the hollow sealing bracket 100 and the side wall of the receiving cavity 520. The end cap 600 has a snap-fit ​​portion on the side facing the hollow sealing bracket 100, which is respectively snapped into the sealing block 200 and the hollow sealing bracket 100, and seals against the end of the receiving cavity 520. The waterproof buffer 300 is disposed between the snap-fit ​​portion and the battery module 700.

[0037] It is understandable that, since the end cap 600 has a snap-fit ​​portion on the side facing the hollow sealing bracket 100, the snap-fit ​​portion is respectively fastened into the sealing block 200 and the air-proof buffer cavity 111, so that the snap-fit ​​portion and the sealing block 200 are fitted together, achieving the initial sealing and waterproofing effect between the end cap 600 and the outer shell 500. Furthermore, the snap-fit ​​portion is fastened into the air-proof buffer cavity 111 to achieve the fitting between the snap-fit ​​portion and the hollow sealing bracket 100, thus forming a secondary sealing and waterproofing effect, effectively ensuring the waterproof effect of the waterproof battery structure 10. Also, since the waterproof buffer component 300 is disposed between the snap-fit ​​portion and the battery module 700, the added waterproof buffer component 300, on the one hand, prevents the hollow sealing bracket 100 from being directly exposed to the air-proof buffer cavity 111, and on the other hand, prevents the hollow sealing bracket 100 from being directly exposed to the air-proof buffer cavity 111, thus achieving the initial sealing and waterproofing effect between the end cap 600 and the outer shell 500. The direct contact with the battery module 700 reduces the probability of the hollow sealing bracket 100 vibrating along with the waterproof buffer 300. On the other hand, the waterproof buffer 300 can better buffer the vibration force of the battery module 700, effectively reducing the vibration force reaching the hollow sealing bracket 100, further reducing the probability of the hollow sealing bracket 100 vibrating, and thus reducing the probability of the sealing block 200 separating from the outer shell 500 due to external vibration, thus better ensuring the sealing performance of the sealing block 200 and the outer shell 500. In addition, the added waterproof buffer 300 also achieves better waterproof performance for the battery module 700, thus effectively ensuring that the waterproof battery structure 10 can still achieve high waterproof performance under vibration conditions.

[0038] In one embodiment, the waterproof buffer 300 is any one of a silicone pad, a nitrile rubber pad, and a neoprene rubber pad, to ensure that the waterproof buffer 300 has good waterproof and cushioning effects.

[0039] like Figure 3 and Figure 4As shown, in one embodiment, the hollow sealing bracket 100 includes an annular sealing main frame 110 and a blocking protrusion ring 120. A buffer cavity 111 is formed in the middle of the annular sealing main frame 110. This effectively reduces the distribution area of ​​the hollow sealing bracket 100 above the battery module 700, thereby reducing the probability of collision between the hollow sealing bracket 100 and the battery module 700. It also effectively reduces the risk of the sealing block 200 easily separating from the outer casing 500 due to the sealing bracket completely covering the battery module 700 in traditional waterproof battery structures 10, thus preventing sealing issues. The probability of waterproof failure; on the other hand, the formed air-proof buffer cavity 111 facilitates the connection of the second retaining ring 620 of the snap-fit ​​part, so as to realize the snap-fit ​​setting of the second retaining ring 620 and the hollow sealing bracket 100; since the annular sealing main frame 110 is sleeved on the inner wall of the accommodating cavity 520, and the annular sealing main frame 110, the blocking protrusion ring 120 and the inner wall of the accommodating cavity 520 together form a filling groove 130, so that the sealing block 200 is embedded in the filling groove 130, realizing the sealing connection between the hollow sealing bracket 100 and the inner wall of the accommodating cavity 520.

[0040] It is understood that, since the blocking protrusion 120 protrudes from one side of the annular sealing main frame 110, the end cover 600 includes a cover plate 630, a first retaining ring 610, and a second retaining ring 620. The first retaining ring 610 and the second retaining ring 620 are spaced apart on the side of the cover plate 630 facing the battery module 700, and together form the snap-fit ​​portion, so that a snap-fit ​​groove is formed between the first retaining ring 610 and the second retaining ring 620. When the operator snaps the end cover 600 onto the outer shell 500, the cover plate 630 is snapped into the sealing block 200 through the first retaining ring 610, that is, the sealing block 200 forms an insertion groove 210, so that the first retaining ring 610 can be snapped into the sealing block 200, and the cover plate 630 and the first retaining ring 620 are snapped into the sealing block 200. The end of the accommodating cavity 520 is sealed and abutted to achieve a preliminary sealing and waterproofing effect between the cover plate 630 and the outer shell 500. Furthermore, since the cover plate 630 is also fastened to the hollow buffer cavity 111 by the second retaining ring 620, the second retaining ring 620 and the hollow sealing bracket 100 are fitted together, thereby forming a secondary sealing and waterproofing effect, which effectively ensures the waterproof effect of the waterproof battery structure 10. Furthermore, since the second retaining ring 620 abuts against the waterproof buffer 300, the added waterproof buffer 300 is in direct contact with the second retaining ring 620, which effectively avoids direct contact between the waterproof buffer 300 and the hollow sealing bracket 100, further reducing the probability of the hollow sealing bracket 100 vibrating with the waterproof buffer 300.

[0041] In one embodiment, the orthographic projection of the hollowed-out sealing bracket 100's airtight buffer cavity 111 is located on the waterproof buffer member 300, such as... Figure 3As shown, the orthographic projection of the hollow buffer cavity 111 is in the direction of arrow B, which effectively reduces the distribution area of ​​the hollow sealing bracket 100 above the battery module 700, ensuring that the vibration force of the battery module 700 directly acts on the waterproof buffer 300 and the end cap 600, further reducing the probability of vibration of the hollow sealing bracket 100, and effectively ensuring that the waterproof battery structure 10 can still achieve high waterproof performance under vibration conditions.

[0042] It is understandable that during the actual assembly of the end cap 600 and the outer shell 500, the perforated sealing bracket 100 is first placed in the mounting groove 510 formed at the end of the receiving cavity 520, and then adhesive is applied to the filling groove 130. Next, the end cap 600 is fastened onto the end of the receiving cavity 520. After the adhesive has solidified, a sealing block 200 is formed in the filling groove 130, thus achieving a seal between the end cap 600 and the outer shell 500. However, under normal circumstances, when the end cap 600 is fastened to the adhesive in the filling groove 130, the outer shell 500 is prone to adhesive overflow or leakage. Therefore, in one embodiment, the first side of the blocking protrusion 120 forms the filling groove 130 with the side wall of the receiving cavity 520, and the second side of the blocking protrusion 120 forms a residual adhesive groove 140 with the second retaining ring 620. The residual adhesive groove 140 communicates with the filling groove 130. The added residual adhesive groove 140 can contain the adhesive overflowing from the filling groove 130, effectively preventing the phenomenon of adhesive overflow or leakage from the outer shell 500, ensuring the aesthetic appearance of the end cap 600 and the outer shell 500 assembly, and reducing the subsequent adhesive removal operation of the outer shell 500. Furthermore, in one embodiment, a residual adhesive component is formed in the residual adhesive groove 140.

[0043] In one embodiment, the end cap 600 further includes reinforcing ribs, and the second retaining ring 620 forms an air-proof cavity 640 in the middle of the cover plate 630 to reduce the contact area between the end cap 600 and the battery module 700, thereby reducing the probability of collision between the end cap 600 and the battery module 700, so as to ensure that the waterproof battery structure 10 can still achieve high waterproof performance under vibration conditions.

[0044] In one embodiment, the reinforcing rib is disposed within the cavity 640. The added reinforcing rib ensures that the end cap 600 has high structural strength while maximizing the formation of a large cavity 640 between the end cap 600 and the battery module 700. This reduces the direct contact area between the end cap 600 and the battery module 700, effectively weakening the amplitude of vibration of the end cap 600. Consequently, it reduces the actual vibration force reaching the hollow sealing bracket 100, ensuring that the waterproof battery structure 10 can still achieve high waterproof performance under vibration conditions.

[0045] In one embodiment, the width of the filling groove 130 is greater than the width of the residual adhesive groove 140, so as to ensure that the sealant block 200 has high waterproof performance while also ensuring that the residual adhesive groove 140 can better meet the overflow adhesive requirements of the filling groove 130.

[0046] In one embodiment, the hollow sealing bracket 100 is a plastic hollow sealing bracket 100. Because the plastic hollow sealing bracket 100 has a certain cushioning effect, it further reduces the probability of vibration, thus better ensuring that the power battery 1 can still achieve high waterproof performance under vibration conditions. In this embodiment, high waterproof performance refers to the power battery 1 achieving the IPX7 waterproof requirement.

[0047] In one embodiment, a plurality of mounting and fixing slots are formed in the air-proof buffer cavity 111, and each cell of the battery module 700 is set in a corresponding manner with each of the mounting and fixing slots to achieve better fixation of the battery module 700.

[0048] In one embodiment, an installation groove 510 is formed at the end of the accommodating cavity 520. The installation groove 510 is adapted to the annular sealing main frame 110. The annular sealing main frame 110 is sleeved on the side wall of the installation groove 510 to ensure that the annular sealing main frame 110, the blocking protrusion 120 and the side wall of the installation groove 510 can form a filling groove 130, which is convenient for the operator to inject adhesive into the filling groove 130.

[0049] In one embodiment, the waterproof battery structure 10 further includes a locking member 400, which is used to fix the outer shell 500 and the end cap 600. The added locking member 400 enables the rapid fixing of the outer shell 500 and the end cap 600, effectively reducing the waiting time for the adhesive to cure, thereby improving the turnover efficiency of each assembly stage of the power battery 1.

[0050] In one embodiment, the locking member 400 is a screw, the end cap 600 has a through hole, and the outer shell 500 has a corresponding threaded hole. The screw passes through the through hole and the threaded hole in sequence and is screwed to the inner wall of the threaded hole, so as to realize the detachable fixing of the outer shell 500 and the end cap 600, which is convenient for the operator to disassemble and assemble.

[0051] like Figure 4 As shown, in one embodiment, the battery module 700 further includes an insulating gasket 710, which is disposed between the battery module 700 and the waterproof buffer 300 to further improve the waterproof performance and safety performance of the battery module 700. Specifically, the insulating gasket 710 is a PC gasket.

[0052] This disclosure also provides a power battery 1, including the waterproof battery structure 10 described in any of the above embodiments. The end cap 600 of the power battery 1 includes a positive end cap 600 and a negative end cap 600. There are two waterproof buffer members 300, namely a first waterproof buffer sub-member and a second waterproof buffer sub-member. The positive end cap 600 and the negative end cap 600 are respectively disposed on both ends of the accommodating cavity 520. The snap-fit ​​portion of the positive end cap 600 is in movable contact with the first waterproof buffer sub-member, and the snap-fit ​​portion of the negative end cap 600 is in movable contact with the second waterproof buffer sub-member. This achieves a sealed and detachable fastening arrangement between the positive end cap 600, the negative end cap 600 and the outer shell 500, which facilitates the operator to disassemble and assemble the battery module 700.

[0053] In one embodiment, both the positive end cap 600 and the negative end cap 600 adopt the end cap 600 structure in the waterproof battery structure 10 of this disclosure.

[0054] Compared with the prior art, this disclosure has at least the following advantages:

[0055] Because the end cap 600 has a snap-fit ​​portion on the side facing the hollow sealing bracket 100, the snap-fit ​​portion is respectively fastened into the sealing block 200 and the air-proof buffer cavity 111, so that the snap-fit ​​portion and the sealing block 200 are fitted together, achieving the initial sealing and waterproofing effect between the end cap 600 and the outer shell 500. Furthermore, the snap-fit ​​portion is fastened into the air-proof buffer cavity 111 to achieve the fitting between the snap-fit ​​portion and the hollow sealing bracket 100, thus forming a secondary sealing and waterproofing effect, effectively ensuring the waterproof effect of the waterproof battery structure 10. Also, because the waterproof buffer component 300 is disposed between the snap-fit ​​portion and the battery module 700, the added waterproof buffer component 300 prevents the hollow sealing bracket 100 from colliding with the battery. The direct contact between the module 700 and the waterproof buffer 300 reduces the probability of the hollow sealing bracket 100 vibrating along with the waterproof buffer 300. On the other hand, the waterproof buffer 300 can better buffer the vibration force of the battery module 700, effectively reducing the vibration force reaching the hollow sealing bracket 100, further reducing the probability of the hollow sealing bracket 100 vibrating, and thus reducing the probability of the sealing block 200 separating from the outer shell 500 due to external vibration, thus better ensuring the sealing performance of the sealing block 200 and the outer shell 500. In addition, the added waterproof buffer 300 also achieves better waterproof performance for the battery module 700, thus effectively ensuring that the waterproof battery structure 10 can still achieve high waterproof performance under vibration conditions.

[0056] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A waterproof battery structure (10), characterized in that, It includes a hollowed-out sealing bracket (100), a sealing block (200), a housing (500), a battery module (700), an end cap (600), and a waterproof buffer (300); The outer casing (500) has a receiving cavity (520), and the battery module (700) is disposed in the receiving cavity (520); The hollow sealing bracket (100) is sealed to the side wall of the accommodating cavity (520) through the sealing block (200); The end cap (600) has a snap-fit ​​part on the side facing the hollow sealing bracket (100). The snap-fit ​​part is respectively fastened in the sealing block (200) and the hollow sealing bracket (100), and seals against the end of the receiving cavity (520). The waterproof buffer (300) is disposed between the snap-fit ​​portion and the battery module (700).

2. The waterproof battery structure (10) according to claim 1, characterized in that, The orthographic projection of the air-proof buffer cavity (111) of the hollow sealing bracket (100) is located on the waterproof buffer component (300).

3. The waterproof battery structure (10) according to claim 1, characterized in that, The waterproof cushioning component (300) is any one of silicone pad, nitrile rubber pad and neoprene rubber pad.

4. The waterproof battery structure (10) according to claim 1, characterized in that, The hollow sealing bracket (100) includes an annular sealing main frame (110) and a blocking protrusion ring (120). A buffer cavity (111) is formed in the middle of the annular sealing main frame (110). The annular sealing main frame (110) is sleeved on the inner wall of the receiving cavity (520). The annular sealing main frame (110), the blocking protrusion ring (120), and the inner wall of the receiving cavity (520) together form a filling groove (130). The sealing block (200) is embedded in the filling groove (130). The blocking protrusion ring (120) protrudes from one side of the annular sealing main frame (110). The end cap (600) includes a cover plate (630), a first retaining ring (610), and a second retaining ring (620). The first retaining ring (610) and the second retaining ring (620) are spaced apart on the side of the cover plate (630) facing the battery module (700) and together form the snap-fit ​​portion. A fastening groove is formed between the first retaining ring (610) and the second retaining ring (620). The cover plate (630) is fastened to the sealing block (200) by the first retaining ring (610), and the cover plate (630) is sealed and abutted against the end of the receiving cavity (520). The cover plate (630) is also fastened to the air-proof buffer cavity (111) by the second retaining ring (620), and the second retaining ring (620) is movably abutted against the waterproof buffer component (300).

5. The waterproof battery structure (10) according to claim 4, characterized in that, The first side of the blocking protrusion (120) forms the filling groove (130) with the side wall of the receiving cavity (520), and the second side of the blocking protrusion (120) forms the residual glue groove (140) with the second retaining ring (620), and the residual glue groove (140) communicates with the filling groove (130).

6. The waterproof battery structure (10) according to claim 5, characterized in that, The end cap (600) further includes reinforcing ribs, and the second retaining ring (620) forms a cavity (640) in the middle of the cover plate (630), with the reinforcing ribs disposed within the cavity (640); and / or, The width of the filling groove (130) is greater than the width of the residual adhesive groove (140); and / or, The hollow sealing bracket (100) is a plastic hollow sealing bracket (100); and / or, Multiple mounting slots are formed inside the air-sheltered buffer cavity (111), and each cell of the battery module (700) is set in a corresponding manner to each of the mounting slots.

7. The waterproof battery structure (10) according to claim 4, characterized in that, The end of the accommodating cavity (520) is formed with a mounting groove (510), which is adapted to the annular sealing main frame (110), and the annular sealing main frame (110) is sleeved on the side wall of the mounting groove (510).

8. The waterproof battery structure (10) according to claim 1, characterized in that, The waterproof battery structure (10) further includes a locking member (400) for securing the outer casing (500) and the end cap (600).

9. The waterproof battery structure (10) according to claim 8, characterized in that, The locking member (400) is a screw, the end cap (600) has a through hole, and the outer shell (500) has a corresponding threaded hole. The screw passes through the through hole and the threaded hole in sequence and is screwed to the inner wall of the threaded hole.

10. A power battery, characterized in that, The waterproof battery structure (10) includes any one of claims 1-9.

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