High-density lithium battery with high-sealing-performance sealing ring assembly

Abstract

The high-density lithium battery comprises a battery shell, a battery pack, an upper cover, a lower cover, a plug assembly and a socket assembly, the sealing assembly comprises a top sealing ring arranged in the upper cover, an upper sealing ring positioned between the upper cover and the battery shell, and a lower sealing ring positioned between the lower cover and the battery shell; the top sealing ring is arranged on the inner side of the upper cover, two sealing grooves are formed in the side, close to the upper cover, of the top sealing ring in a backward concave mode, and sealing holes are formed in the groove bottoms of the sealing grooves. Each of the upper sealing ring and the lower sealing ring comprises a connecting groove; the peripheral sides of the upper sealing ring and the lower sealing ring are also outwards convexly provided with sealing skirts; according to the utility model, the whole set of sealing assembly is arranged, so that the sealing performance is more perfect, and the connection firmness of each component of the sealing assembly is stronger.

Description

Technical Field

[0001] The utility model relates to the field of high-density lithium batteries, and particularly relates to a high-density lithium battery with a high-sealing rubber ring assembly. Background Art

[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution; due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high requirements for the environment; with the development of science and technology, lithium batteries have become the mainstream.

[0003] With the rapid development of the battery field, in order to meet the power consumption needs of devices such as computers, electric vehicles, and drones, a high-density lithium battery has emerged on the market. It is formed by arranging several small lithium batteries into a battery pack, and then the battery pack is covered and protected by a housing. Plugs and sockets also need to be provided on the housing to realize the charging and discharging of the battery.

[0004] As disclosed in the Chinese patent with the patent number ZL 201821478205.0: "A battery pack structure includes a frame and a battery module. The battery module is arranged within the frame. The battery module includes a plurality of battery cells, and one end of the battery cell provided with a tab faces the outside of the frame. In the utility model, the modularization of the battery pack structure is stronger, the energy density is relatively high, the frame of the battery pack structure adopts a steel structure member, the structure is simple, the price is low, the ventilation and heat dissipation effect is good, and in addition, a liquid cooling method is adopted, and the cooling effect is good, which is beneficial to realizing the high-density integration of the battery pack into a large-capacity system and meeting the use under a wide temperature range."

[0005] In the solutions described in the above patents, when necessary, a high-density lithium battery needs to be provided with a housing to adapt to various environments. Especially when in an environment with certain corrosive substances, not only the protection of the housing is required, but also a sufficient sealing structure needs to be provided within the housing to prevent external corrosive substances from entering the high-density lithium battery.

[0006] However, the existing sealing structures in high-density lithium batteries are not set firmly enough. When the lithium battery moves or is vibrated, the rubber rings inside it are likely to fall off, resulting in the failure of the sealing structure. Therefore, the sealing performance and stability of the sealing structures in high-density lithium batteries in the prior art are insufficient. Summary of the Invention

[0007] In order to overcome the deficiency that the sealing structure in a high-density lithium battery in the prior art is prone to loosen and fall off, resulting in its sealing performance and firmness not meeting the requirements, the utility model provides a high-density lithium battery with a high-sealing rubber ring assembly.

[0008] The technical solution for this utility model to solve its technical problems is: A high-density lithium battery with a high-sealing rubber ring assembly, comprising:

[0009] A battery housing, which is provided with a battery compartment that penetrates up and down inside;

[0010] A battery pack, which is located inside the battery compartment. The battery pack further includes a battery bracket and a plurality of cylindrical batteries arranged and connected to the battery bracket;

[0011] An upper cover, which is connected to the upper end of the battery housing and covers the upper opening of the battery compartment. The upper cover is provided with a first through hole and a second through hole that penetrate inside and outside;

[0012] A lower cover, which is connected to the lower end of the battery housing and covers the lower opening of the battery compartment;

[0013] A plug assembly and a socket assembly. The plug assembly is inserted into the first through hole, and the socket assembly is inserted into the second through hole;

[0014] It further includes:

[0015] A sealing assembly, which includes a top rubber ring arranged inside the upper cover, an upper rubber ring located between the upper cover and the battery housing, and a lower rubber ring located between the lower cover and the battery housing;

[0016] The top rubber ring is arranged inside the upper cover. There are also two sealing grooves recessed backward on one side of the top rubber ring close to the upper cover. Sealing holes are also opened at the bottom of the sealing grooves. The plug assembly and the socket assembly pass through the sealing holes and extend into the inside of the upper cover, and a sealing fit is formed between the peripheral side walls of the plug assembly and the socket assembly and the hole walls of the sealing holes;

[0017] Both the upper rubber ring and the lower rubber ring include connection grooves. The top of the battery pack is inserted and fitted into the connection groove of the upper rubber ring, and the bottom of the battery pack is inserted and fitted into the connection groove of the lower rubber ring; Sealing skirts protrude outward on the peripheral sides of the upper rubber ring and the lower rubber ring. The sealing skirt of the upper rubber ring is clamped between the lower end face of the upper cover and the upper end face of the battery housing, and the sealing skirt of the lower rubber ring is clamped between the upper end face of the lower cover and the lower end face of the battery housing.

[0018] Furthermore, an upper fitting step is also opened downward on the inner side of the upper end of the battery housing, and the sealing skirt of the upper rubber ring is fitted and connected to the upper fitting step; A lower fitting step is also opened upward on the inner side of the lower end of the battery housing, and the sealing skirt of the lower rubber ring is fitted and connected to the lower fitting step.

[0019] Further, several threaded posts are also penetratingly provided along the axial direction on the inner wall of the battery compartment. A number of threaded holes are provided on the upper cover and the lower cover. The upper cover and the lower cover are connected by threading to realize the connection with the battery housing. A number of bolt holes for bolts to pass through are also provided on the sealing skirts of the upper sealing ring and the lower sealing ring.

[0020] Further, several relief grooves are also provided on the side walls of the upper sealing ring and the lower sealing ring. The threaded posts in the battery housing can be snap-fitted into the relief grooves.

[0021] Further, positioning claws are convexly provided on both the upper and lower sides of the battery bracket. A number of positioning holes are provided on the upper sealing ring and the lower sealing ring. The positioning claws include a rod portion close to the battery bracket and a head portion away from the battery bracket. The diameter of the head portion is larger than the diameter of the positioning hole. The positioning claws can be inserted and fitted into the positioning holes, and the head portion is used to prevent the positioning claws from disengaging from the positioning holes.

[0022] Further, the positioning claws are composed of several claw petals. The claw petals can be closed or unfolded under the action of an external force. When the claw petals are closed, the diameter of the head portion of the positioning claw is reduced. When the claw petals are unfolded, the diameter of the head portion of the positioning claw is increased.

[0023] Further, the top sealing ring includes an upper sealing edge on its upper side and a lower sealing edge on its lower side. The upper side of the upper sealing edge is in contact with the inner side of the upper cover. The upper side of the lower sealing edge is in contact with the inner side of the upper cover, and its lower side is in contact with the upper side of the upper sealing ring.

[0024] Further, a number of limiting holes are provided on both the upper sealing edge and the lower sealing edge. A number of upper limiting posts are convexly provided downward on the inner side of the upper cover. A number of lower limiting posts are convexly provided upward on the upper side of the upper sealing ring. The upper limiting posts are inserted and fitted into the limiting holes of the upper sealing edge, and the lower limiting posts are inserted and fitted into the limiting holes of the lower sealing edge.

[0025] Assembly process of the high-density lithium battery of the present utility model: First, connect the cylindrical batteries and install them on the battery bracket to complete the assembly of the battery pack. Then, place the entire battery pack in the battery compartment of the battery housing. Next, align the connection groove on the lower sealing ring with the lower end of the battery pack and fit it on. While the lower end of the battery pack is inserted and fitted into the connection groove, the positioning claws on the lower side of the battery bracket are also snap-fitted into the positioning holes of the lower sealing ring. At this time, the sealing skirt of the lower sealing ring is also fitted on the lower fitting step of the battery housing. Then, the lower cover can be covered on the lower end of the battery housing and the two are connected by bolts. Subsequently, align the connection groove on the upper sealing ring with the upper end of the battery pack and fit it on. While the upper end of the battery pack is inserted and fitted into the connection groove, the positioning claws on the upper side of the battery bracket are also snap-fitted into the positioning holes of the upper sealing ring. At this time, the sealing skirt of the upper sealing ring is also fitted on the upper fitting step of the battery housing. It is also necessary to complete the assembly of the upper cover. After inserting and installing the plug assembly and the socket assembly on the upper cover, align the limiting holes on the upper sealing sticker of the top sealing ring with the upper limiting posts on the inner side of the upper cover, and then fit the top sealing ring on the inner side of the upper cover, so that the sealing groove on the top sealing ring covers the plug assembly and the socket assembly, and the plug assembly and the socket assembly also pass through the sealing holes on the bottom of the sealing groove and extend to the inner side of the upper cover. Finally, cover the upper cover on the upper end of the battery housing. During this process, it is also necessary to align the limiting holes on the lower sealing sticker of the top sealing ring with the lower limiting posts on the upper side of the upper sealing ring. After the upper cover is covered, connect it to the battery housing by bolts.

[0026] The beneficial effects of the present utility model are as follows:

[0027] 1. There is a complete set of sealing components. The top sealing ring is relied on to complete the sealing of the holes on the upper cover, the upper sealing ring is relied on to complete the sealing between the upper cover and the battery housing, and the lower sealing ring is relied on to complete the sealing between the lower cover and the battery housing. Moreover, the upper sealing ring and the lower sealing ring are also connected to the battery pack in the battery compartment. Therefore, the battery not only has a more perfect sealing performance, but also the connection firmness of each component of the sealing component is stronger.

[0028] 2. Sealing skirts are also provided on the upper sealing ring and the lower sealing ring. Correspondingly, fitting steps are respectively provided on the upper and lower sides of the battery housing. By relying on the cooperation between the sealing skirts and the fitting steps, the sealing performance of the battery can be further improved.

[0029] 3. The positioning holes on the upper sealing ring and the lower sealing ring can form a snap-fitting with the positioning claws on the battery bracket, thereby further preventing the upper sealing ring and the lower sealing ring from moving relative to the battery pack during the use of the battery. And relying on the above positioning structure can also make the assembly process of the battery easier to operate.

[0030] 4. Both the upper cover and the upper sealing ring are provided with structures for positioning the top sealing ring, so as to ensure that the top sealing ring will not move or fall off after the battery is assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the present utility model.

[0032] Figure 2 is an exploded view of the present utility model.

[0033] Figure 3 is an exploded view of the battery housing, battery pack and upper sealing ring in the present utility model.

[0034] Figure 4 is Figure 3 an enlarged view of part A in

[0035] Figure 5 is a schematic structural diagram of the upper sealing ring in the present utility model.

[0036] Figure 6 is an exploded view of the battery housing, battery pack and lower sealing ring in the present utility model.

[0037] Figure 7 is a schematic diagram of the cooperation between the upper cover and the top sealing ring in the present utility model.

[0038] Figure 8 is an exploded view of the upper cover and the top sealing ring in the present utility model.

[0039] Figure 9 is a schematic diagram of the cooperation between the upper sealing ring and the top sealing ring in the present utility model.

[0040] Reference numerals in the drawings: 1. Battery housing; 2. Battery compartment; 3. Battery pack; 4. Battery bracket; 5. Cylindrical battery; 6. Upper cover; 7. First through hole; 8. Second through hole; 9. Lower cover; 10. Plug assembly; 11. Socket assembly; 12. Top sealing ring; 13. Upper sealing ring; 14. Lower sealing ring; 15. Sealing groove; 16. Sealing hole; 17. Connecting groove; 18. Sealing skirt; 19. Upper fitting step; 20. Lower fitting step; 21. Threaded post; 22. Threaded hole; 23. Bolt hole; 24. Avoidance groove; 25. Positioning claw; 26. Positioning hole; 27. Claw lobe; 28. Upper sealing edge; 29. Lower sealing edge; 30. Limiting hole; 31. Upper limiting post; 32. Lower limiting post. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0042] It should be understood that although terms such as upper, middle, lower, top, one end, etc. appear in this text to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for easy understanding, rather than to define any limitation in terms of direction or order.

[0043] Embodiment

[0044] Combine Figures 1 to 9A high-density lithium battery with a highly sealed sealing ring assembly is shown, which includes a battery housing 1, a battery pack 3, an upper cover 6, a lower cover 9, a plug assembly 10 and a socket assembly 11; a battery compartment 2 is vertically and throughly opened inside the battery housing 1; the battery pack 3 is located in the battery compartment 2, and the battery pack 3 further includes a battery bracket 4 and a plurality of cylindrical batteries 5 arranged and connected to the battery bracket 4; the upper cover 6 is connected to the upper end of the battery housing 1 and covers the upper opening of the battery compartment 2, and a first through hole 7 and a second through hole 8 are vertically and throughly opened on the upper cover 6; the lower cover 9 is connected to the lower end of the battery housing 1 and covers the lower opening of the battery compartment 2; the plug assembly 10 is inserted into the first through hole 7, and the socket assembly 11 is inserted into the second through hole 8; a sealing assembly is further included, which includes a top sealing ring 12 arranged inside the upper cover 6, an upper sealing ring 13 located between the upper cover 6 and the battery housing 1, and a lower sealing ring 14 located between the lower cover 9 and the battery housing 1; the top sealing ring 12 is arranged on the inner side of the upper cover 6, and two sealing grooves 15 are recessed backward on the side of the top sealing ring 12 close to the upper cover 6, and a sealing hole 16 is further opened at the bottom of the sealing groove 15. The plug assembly 10 and the socket assembly 11 pass through the sealing hole 16 and extend into the inner side of the upper cover 6, and the peripheral side walls of the plug assembly 10 and the socket assembly 11 form a sealing fit with the hole wall of the sealing hole 16; both the upper sealing ring 13 and the lower sealing ring 14 include a connecting groove 17. The top of the battery pack 3 is inserted and fitted into the connecting groove 17 of the upper sealing ring 13, and the bottom of the battery pack 3 is inserted and fitted into the connecting groove 17 of the lower sealing ring 14; the peripheral sides of the upper sealing ring 13 and the lower sealing ring 14 further protrude outward with a sealing skirt 18. The sealing skirt 18 of the upper sealing ring 13 is clamped between the lower end face of the upper cover 6 and the upper end face of the battery housing 1, and the sealing skirt 18 of the lower sealing ring 14 is clamped between the upper end face of the lower cover 9 and the lower end face of the battery housing 1.

[0045] Combined with Figure 3 、 Figure 4 and Figure 6 shown, in this embodiment, an upper fitting step 19 is further opened downward on the inner side of the upper end of the battery housing 1, and the sealing skirt 18 of the upper sealing ring 13 is fitted and connected to the upper fitting step 19; a lower fitting step 20 is further opened upward on the inner side of the lower end of the battery housing 1, and the sealing skirt 18 of the lower sealing ring 14 is fitted and connected to the lower fitting step 20.

[0046] Combined with Figures 1 to 7As described above, in this embodiment, several threaded posts 21 are also provided through the inner wall of the battery compartment 2 along its axial direction. A plurality of threaded holes 22 are formed in the upper cover 6 and the lower cover 9. The upper cover 6 and the lower cover 9 are connected by threads to realize the connection with the battery housing 1. A plurality of bolt holes 23 for bolts to pass through are also formed in the sealing skirts 18 of the upper sealing ring 13 and the lower sealing ring 14.

[0047] Combined with Figure 3 , Figure 5 and Figure 6 As shown, in this embodiment, several relief grooves 24 are also formed on the side walls of the upper sealing ring 13 and the lower sealing ring 14. The threaded posts 21 in the battery housing 1 can be snap-fitted into the relief grooves 24.

[0048] Combined with Figures 3 to 6 As shown, in this embodiment, positioning claws 25 are convexly provided on both the upper and lower sides of the battery bracket 4. A plurality of positioning holes 26 are formed in the upper sealing ring 13 and the lower sealing ring 14. The positioning claw 25 includes a rod portion close to the battery bracket 4 and a head portion away from the battery bracket 4. The diameter of the head portion is larger than the diameter of the positioning hole 26. The positioning claw 25 can be inserted and fitted into the positioning hole 26, and the head portion is used to prevent the positioning claw 25 from disengaging from the positioning hole 26.

[0049] As shown in Figure 4 , in this embodiment, the positioning claw 25 is composed of several claw petals 27. The claw petals 27 can be closed or unfolded under the action of an external force. When the claw petals 27 are closed, the diameter of the head portion of the positioning claw 25 is reduced. When the claw petals 27 are unfolded, the diameter of the head portion of the positioning claw 25 is increased.

[0050] Combined with Figures 7 to 9 As shown, in this embodiment, the top sealing ring 12 includes an upper sealing edge 28 on its upper side and a lower sealing edge 29 on its lower side. The upper side of the upper sealing edge 28 is in contact with the inner side of the upper cover 6. The upper side of the lower sealing edge 29 is in contact with the inner side of the upper cover 6, and its lower side is in contact with the upper side of the upper sealing ring 13.

[0051] Combined with Figures 7 to 9 As shown, in this embodiment, a plurality of limiting holes 30 are formed in both the upper sealing edge 28 and the lower sealing edge 29. A plurality of upper limiting posts 31 protrude downward from the inner side of the upper cover 6. A plurality of lower limiting posts 32 protrude upward from the upper side of the upper sealing ring 13. The upper limiting posts 31 are inserted and fitted into the limiting holes 30 of the upper sealing edge 28, and the lower limiting posts 32 are inserted and fitted into the limiting holes 30 of the lower sealing edge 29.

[0052] Assembly process of the high-density lithium battery in this embodiment: First, connect the cylindrical batteries 5 and install them on the battery bracket 4 to complete the assembly of the battery pack 3, and then place the entire battery pack 3 in the battery compartment 2 of the battery housing 1; then align the connection groove 17 on the lower sealing ring 14 with the lower end of the battery pack 3 and fit it on, so that while the lower end of the battery pack 3 is inserted and fitted into the connection groove 17, the positioning claws 25 on the lower side of the battery bracket 4 are also snap-fitted into the positioning holes 26 of the lower sealing ring 14, and at this time, the sealing skirt 18 of the lower sealing ring 14 is also fitted into the lower fitting step 20 of the battery housing 1. Then, the lower cover 9 can be covered on the lower end of the battery housing 1 and the two are connected by bolts; subsequently, align the connection groove 17 on the upper sealing ring with the upper end of the battery pack 3 and fit it on, so that while the upper end of the battery pack 3 is inserted and fitted into the connection groove 17, the positioning claws 25 on the upper side of the battery bracket 4 are also snap-fitted into the positioning holes 26 of the upper sealing ring 13, and at this time, the sealing skirt 18 of the upper sealing ring 13 is also fitted into the upper fitting step 19 of the battery housing 1; it is also necessary to complete the assembly of the upper cover 6. After inserting and installing the plug assembly 10 and the socket assembly 11 on the upper cover 6, after aligning the limiting holes 30 on the upper sealing edge 28 of the top sealing ring 12 with the upper limiting posts 31 on the inner side of the upper cover 6, then fit the top sealing ring 12 to the inner side of the upper cover 6, so that the sealing groove 15 on the top sealing ring 12 covers the plug assembly 10 and the socket assembly 11, and the plug assembly 10 and the socket assembly 11 also pass through the sealing holes 16 on the bottom of the sealing groove 15 and extend to the inner side of the upper cover 6; finally, cover the upper cover 6 on the upper end of the battery housing 1. During this process, it is also necessary to align the limiting holes 30 on the lower sealing edge 29 of the top sealing ring 12 with the lower limiting posts 32 on the upper side of the upper sealing ring 13, and after the upper cover 6 is covered, connect it to the battery housing 1 by bolts.

[0053] The advantages of this embodiment are as follows: By relying on the settings of the top sealing ring, the upper sealing ring and the lower sealing ring, the sealing performance of this high-density lithium battery is effectively improved, and each sealing ring is also fixed in position by the positioning structure, making the sealing structure of this high-density lithium battery more stable.

[0054] The above specific embodiments are only explanations of the present invention, and they are not limitations on the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A high-density lithium battery with a high-sealing sealing ring assembly, comprising: A battery housing (1) has a battery compartment (2) extending vertically therein; A battery pack (3) located in the battery compartment (2), the battery pack (3) further comprising a battery holder (4) and a plurality of cylindrical batteries (5) arranged and connected to the battery holder (4); An upper cover (6) is connected to the upper end of the battery housing (1) and covers the upper opening of the battery compartment (2); a first through hole (7) and a second through hole (8) are formed on the upper cover (6) to pass through the inside and outside of the upper cover; A lower cover (9) connected to the lower end of the battery housing (1) and covering the lower opening of the battery compartment (2); A plug assembly (10) and a socket assembly (11), wherein the plug assembly (10) is inserted into the first through hole (7), and the socket assembly (11) is inserted into the second through hole (8); It is characterized in that Also included are: A sealing assembly comprising a top sealing ring (12) disposed in an upper cover (6), an upper sealing ring (13) located between the upper cover (6) and a battery housing (1), and a lower sealing ring (14) located between a lower cover (9) and the battery housing (1); A top sealing ring (12) is arranged on the inner side of the upper cover (6), and two sealing grooves (15) are recessed backwards on the side of the top sealing ring (12) close to the upper cover (6), and a sealing hole (16) is also opened at the bottom of the sealing groove (15), and the plug assembly (10) and the socket assembly (11) extend into the inner side of the upper cover (6) through the sealing hole (16), and the peripheral side walls of the plug assembly (10) and the socket assembly (11) form a sealing fit with the hole wall of the sealing hole (16); The upper sealing ring (13) and the lower sealing ring (14) both include a connection groove (17); the top of the battery pack (3) is plugged into the connection groove (17) of the upper sealing ring (13), and the bottom of the battery pack (3) is plugged into the connection groove (17) of the lower sealing ring (14); the upper sealing ring (13) and the lower sealing ring (14) are also provided with sealing skirts (18) protruding outward on the circumference; the sealing skirt (18) of the upper sealing ring (13) is sandwiched between the lower end surface of the upper cover (6) and the upper end surface of the battery housing (1); and the sealing skirt (18) of the lower sealing ring (14) is sandwiched between the upper end surface of the lower cover (9) and the lower end surface of the battery housing (1).

2. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 1, characterized in that: The inner side of the upper end of the battery housing (1) is also provided with an upper engaging step (19) extending downward, and the sealing skirt (18) of the upper sealing ring (13) is engaged with the upper engaging step (19); the inner side of the lower end of the battery housing (1) is also provided with a lower engaging step (20) extending upward, and the sealing skirt (18) of the lower sealing ring (14) is engaged with the lower engaging step (20).

3. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 1, characterized in that: The inner wall of the battery compartment (2) is provided with a plurality of threaded columns (21) along its axial direction, the upper cover (6) and the lower cover (9) are provided with a plurality of threaded holes (22), the upper cover (6) and the lower cover (9) are connected to the battery housing (1) by threads, and the sealing skirts (18) of the upper sealing ring (13) and the lower sealing ring (14) are provided with a plurality of bolt holes (23) for bolts to pass through.

4. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 3, characterized in that: A plurality of avoidance grooves (24) are also provided on the side walls of the upper sealing ring (13) and the lower sealing ring (14), and the threaded column (21) in the battery housing (1) can be snap-fitted into the avoidance grooves (24).

5. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 1, characterized in that: The battery holder (4) is provided with positioning claws (25) on both upper and lower sides, and the upper sealing ring (13) and the lower sealing ring (14) are provided with a plurality of positioning holes (26); the positioning claw (25) comprises a rod portion close to the battery holder (4) and a head portion far away from the battery holder (4), wherein the diameter of the head portion is larger than the diameter of the positioning hole (26), the positioning claw (25) can be inserted and matched in the positioning hole (26), and the positioning claw (25) is prevented from being separated from the positioning hole (26) by the head portion.

6. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 5, characterized in that: The positioning claw (25) is composed of a plurality of claw petals (27), and the claw petals (27) can be closed or expanded with each other under the action of external force; when the claw petals (27) are closed, the diameter of the head of the positioning claw (25) is reduced; when the claw petals (27) are expanded, the diameter of the head of the positioning claw (25) is increased.

7. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 1, characterized in that: The top sealing ring (12) comprises an upper sealing edge (28) located on its upper side and a lower sealing edge (29) located on its lower side; wherein the upper side surface of the upper sealing edge (28) is in contact with the inner side surface of the upper cover (6); the upper side surface of the lower sealing edge (29) is in contact with the inner side surface of the upper cover (6), and the lower side surface is in contact with the upper side surface of the upper sealing ring (13).

8. A high-density lithium battery with a high-sealing sealing ring assembly according to claim 7, characterized in that: A plurality of limiting holes (30) are provided on the upper sealing edge (28) and the lower sealing edge (29); a plurality of upper limiting posts (31) are protruding downwardly from the inner side of the upper cover (6); and a plurality of lower limiting posts (32) are protruding upwardly from the upper side of the upper sealing ring (13); the upper limiting posts (31) are plugged into and fitted in the limiting holes (30) of the upper sealing edge (28), and the lower limiting posts (32) are plugged into and fitted in the limiting holes (30) of the lower sealing edge (29).

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