CN217881806U - Pole, cover plate and battery - Google Patents

Abstract

The utility model relates to a battery manufacturing technology field, concretely relates to utmost point post, apron and battery. The utmost point post includes: the pole column body is provided with the fixing claws, and the fixing claws are suitable for being bent towards the direction far away from the center of the pole column body under the action of external force so as to fix the pole column on the top cover. The utility model discloses a stationary dog is with utmost point post riveting on the top cap, adopt riveted mode to fix utmost point post on the top cap promptly, fastening effect is good, sealing washer or last plastic easily receive high temperature to take place the creep and lead to sealedly when having avoided fastening utmost point post because of welding, fastening effect variation, compare with the technique of moulding plastics, practice thrift the cost that the injection molding machine purchased and placed the space, the production efficiency of product has still been improved, the upper end of adopting to dash to rivet on the top surface of utmost point post among the prior art and causing the recess too big time utmost point post to split easily or fold and the recess too little utmost point post fastening effect is poor effectively, easily cause the problem of quality reduction.

Description

Pole, cover plate and battery

Technical Field

The utility model relates to a battery manufacturing technical field, concretely relates to utmost point post, apron and battery.

Background

The transformation and upgrading of the automobile manufacturing industry are actively promoted due to the requirements of protecting the environment, improving the ecological environment and realizing carbon neutralization. The new energy plays a vital role in sustainable industry, the power battery provides a wide development space in the fields of new energy automobiles and energy storage power stations, and the power battery has larger capacity and larger power compared with batteries used by products such as 3C and the like, so that the safety performance of the power battery in the processes of quick charge and discharge and normal use must be ensured, wherein the excellent design of the cover plate component of the battery is one of important factors for ensuring the safe operation of the power battery.

At present, the apron subassembly often adopts following mode fastening seal utmost point post: 1. the positive and negative poles are fixed on the cover plate by extruding pole post rings on the upper surface of the cover plate; 2. fixing the positive and negative poles on the cover plate by using a fixing piece which is welded on the surface of the cover plate and matched with the injection molding; 3. fixing the positive and negative poles on the cover plate by using a cover glass provided with a containing cavity; 4. the upper plastic with complex shape is used to fix the positive and negative poles on the cover plate. The pole is fastened and sealed by adopting welding and injection molding technologies, and the sealing ring or the upper plastic is easy to creep under high temperature due to the close distance between the sealing ring or the upper plastic and the fixing piece, so that the sealing and fastening effects are poor, and the product quality is further influenced; the injection molding technology requires an injection molding machine and a large working space, and if the injection molding technology needs to be used together with the cover plate for injection molding, the production efficiency is relatively low.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that the adoption welding among the prior art, the fixed utmost point post of the technique of moulding plastics influence product quality, reduction production efficiency to a utmost point post, apron and battery are provided.

In order to solve the above problem, the utility model provides a pole, include: the pole column body is provided with the fixing claws, and the fixing claws are suitable for being bent towards the direction far away from the center of the pole column body under the action of external force so as to fix the pole column on the top cover.

Optionally, the upper surface and/or the lower surface of the pole column body is provided with a fixing claw.

Optionally, be equipped with the stationary dog on the lower surface of utmost point post body, utmost point post body includes first post section and second post section, and the external diameter of first post section is greater than the external diameter of second post section, and the lower terminal surface form of first post section compresses tightly the face to compress tightly sealing member.

The utility model also provides an apron, include: the top cover is provided with a first mounting hole, and the pole is mounted in the first mounting hole.

Optionally, the cover plate further comprises a sealing element, and the sealing element is arranged between the pole and the top cover to seal the top cover and the pole.

Optionally, the first mounting hole includes an upper hole section, a lower hole section and a connection surface connecting the upper hole section and the lower hole section, and the fixing claw of the pole is bent and then arranged corresponding to the connection surface.

Optionally, the cover plate further comprises a conductive pressing plate, a fixing hole for the fixing claw to penetrate through is formed in the conductive pressing plate, the fixing claw is suitable for penetrating through the fixing hole and being bent towards the direction away from the center of the pole body under the action of external force and then is pressed on the conductive pressing plate, and therefore the sealing element and the conductive pressing plate are pressed.

Optionally, a groove communicated with the fixing hole is formed in the lower surface of the conductive pressing plate, the groove is located on one side, away from the center of the conductive pressing plate, of the fixing hole, and the fixing claw is embedded into the groove after being bent.

Optionally, the cover plate further includes an insulating plate disposed on the lower surface of the top cap, the insulating plate has a through hole for mounting the conductive pressure plate and an insulating protrusion extending toward the center of the through hole, and the insulating protrusion is engaged with the connection surface, the upper surface of the conductive pressure plate, and the sealing member.

Optionally, the cover plate further comprises a conductive connecting sheet, and the conductive connecting sheet is arranged on the lower surface of the conductive pressing plate.

Optionally, the cover plate further includes an upper ring body, and the upper ring body is arranged on the upper portion of the pole in a surrounding manner and is matched with the upper surface of the top cover and the sealing element.

The utility model also provides a battery, include: the cover plate is described above.

The utility model has the advantages of it is following:

1. when installing utmost point post on the top cap, earlier in the utmost point post that has the stationary dog passes the first mounting hole of top cap, exert external force on the stationary dog, under the effect of external force, the stationary dog is buckled in order to compress tightly on the top cap to the direction of keeping away from utmost point post body center, adopt the stationary dog to rivet utmost point post on the top cap, adopt riveted mode to fix utmost point post on the top cap promptly, fastening effect is good, sealing washer or last plastic easily receive high temperature to take place the creep and lead to sealing when having avoided because of welding fastening utmost point post, fastening effect worsens, compared with the technique of moulding plastics, practice thrift the cost that the injection molding machine purchased and placed the space, the production efficiency of product has still been improved, the problem of the decline of quality is easily split or fold and the utmost point post fastening effect is poor when the recess causes the recess too big time utmost point post to the upper end of adoption to dash on the top surface of riveting utmost point post among the prior art effectively.

2. The post body comprises a first post section and a second post section, the outer diameter of the first post section is larger than that of the second post section, and a pressing surface is formed on the lower end face of the first post section to press the sealing element. When acting force is applied to the fixed claw, the sealing element is pressed by the pressing surface and the fixed claw, double-layer sealing is achieved, and the sealing effect of the pole is improved.

3. The apron still includes the sealing member, and the sealing member setting is between utmost point post and top cap to seal cap and utmost point post, the sealing member plays sealed effect, prevents that outside foreign matter from getting into the battery inside or electrolyte flows, and can prevent that utmost point post from appearing rocking in the mounting hole, also can realize the insulation between utmost point post and the top cap, prevents electric core and top cap short circuit, the security of guarantee battery.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows an exploded schematic view of a cover plate of an embodiment of the invention;

FIG. 2 shows a schematic cross-sectional view of the cover plate of FIG. 1;

FIG. 3 shows a partial schematic view of the left side of the cover plate of FIG. 2;

FIG. 4 shows a partial schematic view of the right side of the cover plate of FIG. 2;

fig. 5 shows a schematic top view of the cover plate of fig. 1.

Description of reference numerals:

11. a negative pole post; 12. a positive post; 13. a pole body; 131. a first column section; 132. a second column section; 14. a fixed jaw; 20. a top cover; 21. a first mounting hole; 23. a second mounting hole; 24. a liquid injection hole; 31. a first seal member; 32. a second seal member; 40. an explosion-proof structure; 41. an explosion-proof membrane; 42. An explosion-proof valve; 50. an insulating plate; 51. an insulating projection; 61. a negative conductive platen; 62. a positive conductive platen; 63. a fixing hole; 71. a negative conductive connecting sheet; 72. a positive conductive connecting sheet; 81. an insulating ring; 82. and a conductive ring.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 5, the pole of the present embodiment includes: the pole comprises a pole body 13 and a plurality of fixing claws 14, wherein the fixing claws 14 are arranged on the pole body 13, and the fixing claws 14 are suitable for being bent towards the direction away from the center of the pole body 13 under the action of external force so as to fix the pole on a top cover 20.

Use the utmost point post of this embodiment, when installing the utmost point post on top cap 20, earlier in the utmost point post that has stationary dog 14 passes the first mounting hole 21 of top cap 20, exert external force on stationary dog 14, under the effect of external force, stationary dog 14 is buckled to the direction of keeping away from utmost point post body 13 center in order compressing tightly on top cap 20, adopt stationary dog 14 to rivet utmost point post on top cap 20, adopt the riveted mode to fix utmost point post on top cap 20 promptly, fastening effect is good, it easily receives high temperature to take place the creep to lead to sealing to having avoided sealing washer or last plastic when welding fastening utmost point post to lead to the fact sealedly, fastening effect worsens, compared with the technique of moulding plastics, practice thrift the cost that the injection molding machine purchased and placed the space, still improved the production efficiency of product, the upper end of utmost point post easily splits or the fold when also having solved effectively and adopting to dash to rivet the recess on the utmost point post top surface and cause the recess too big, and the utmost point post fastening effect is poor when the recess is too little, easily cause the problem of quality decline.

In this embodiment, the lower surface of the pole body 13 is provided with the fixing claw 14, the pole penetrates through the first mounting hole 21 of the top cover from top to bottom, and then the fixing claw 14 bends to the edge of the first mounting hole 21 under the external force extrusion so as to be pressed on the top cover 20, so that the assembly is simple, the assembly difficulty is reduced, and the assembly efficiency is improved. It will be appreciated that as an alternative embodiment, both the upper and lower surfaces of the pole body 13 may have fixing claws 14, or only the upper surface of the pole body 13 may have fixing claws 14.

Preferably, as shown in fig. 2 to 4, the pole cylinder 13 includes a first cylinder section 131 and a second cylinder section 132, an outer diameter of the first cylinder section 131 is larger than an outer diameter of the second cylinder section 132, and a lower end surface of the first cylinder section 131 forms a pressing surface to press the seal. When acting force is applied to the fixed claw 14, the sealing element is pressed by the pressing surface and the fixed claw 14, double-layer sealing is achieved, and the sealing effect of the pole is improved. Wherein, up and down refer to "up and down" as indicated by arrows in fig. 2.

The utility model also provides a apron, as shown in fig. 1 to 5, it includes: the top cover 20 and the above-mentioned pole, the top cover 20 has the first mounting hole 21, the pole is installed in the first mounting hole 21. Firstly, the pole with the fixed claw 14 penetrates through the first mounting hole 21 of the top cover 20, external force is applied to the fixed claw 14, the fixed claw 14 is bent towards the direction far away from the center of the pole column body 13 under the action of the external force so as to be tightly pressed on the top cover 20, the pole is fixed on the top cover 20 in a riveting mode, the fastening effect is good, and the production efficiency of products is improved.

Specifically, the terminal post on the top cap is two and is positive terminal post 12 and negative pole post 11 respectively, the quantity of first mounting hole 21 also is two and is positive mounting hole and negative pole mounting hole respectively this moment, positive mounting hole and negative pole mounting hole interval set up, wherein, negative pole post 11 is used for being connected with the negative pole ear of electric core, positive terminal post 12 is used for being connected with the positive pole ear of electric core, the material of terminal post is the metal, generally, the material of negative pole post 11 is aluminum alloy or copper-aluminum alloy, for example, when negative pole post 11 adopts copper-aluminum alloy, terminal post body 13 is the aluminum alloy, stationary dog 14 is the copper alloy, terminal post body 13 and stationary dog 14 pass through hot-pressing composite forming, the material of positive terminal post 12 is the aluminum alloy. It is understood that the material of the negative electrode tab 11 may be the same as that of the positive electrode tab 12, and may be aluminum alloy or copper-aluminum alloy.

In this embodiment, the apron still includes the sealing member, and the sealing member setting is between utmost point post and top cap 20 to sealing top cap 20 and utmost point post, the sealing member plays sealed effect, prevents that outside foreign matter from getting into the inside or electrolyte outflow of battery, and can prevent that utmost point post from appearing rocking in the mounting hole, also can realize the insulation between utmost point post and the top cap 20, prevents electric core and top cap 20 short circuit, the security of guarantee battery.

Specifically, when the number of the poles on the top cover is two, the number of the sealing members is also two and is respectively a first sealing member 31 and a second sealing member 32, the first sealing member 31 is disposed between the negative pole 11 and the top cover 20, and the second sealing member 32 is disposed between the positive pole 12 and the top cover 20. It will be appreciated that as an alternative embodiment, when one pole is integrally formed with the cap, a seal is provided between the other pole and the cap, where the number of seals is one.

In this embodiment, first mounting hole 21 includes hole section, lower hole section and connects the connection face of hole section and lower hole section, and the stationary dog 14 of utmost point post is buckled the back and is connected the face and correspond the setting, and first mounting hole 21 is the shoulder hole promptly, and the shoulder hole is convenient for and stationary dog 14 cooperation, simplifies fixed mode.

In this embodiment, the cover plate further includes a conductive pressing plate, the conductive pressing plate is provided with a fixing hole 63 for the fixing claw 14 to penetrate through, and the fixing claw 14 is adapted to penetrate through the fixing hole and press the conductive pressing plate after bending towards the direction away from the center of the pole cylinder 13 under the action of an external force, so as to press the sealing element and the conductive pressing plate. The upper surface of conductive pressing plate and the lower surface laminating of second pillar 132 realize through conductive pressing plate that utmost point post is connected with the utmost point ear electricity of electric core, and the connected mode is simple and convenient. It will be appreciated that, as an alternative embodiment, the conductive pressure plate may be omitted, i.e. the conductive pressure plate is removed and the conductive tab is in direct contact with the lower surface of the pole, the holding pawl 14 then pressing the seal under the external pressure.

Specifically, when there are two poles on the top cover, the number of the conductive pressing plates is two, and the conductive pressing plates are respectively a positive conductive pressing plate 62 and a negative conductive pressing plate 61, the positive conductive pressing plate 62 is matched with the positive pole 12, and the negative conductive pressing plate 61 is matched with the negative pole 11. The positive conductive platen 62 is made of aluminum or the like, and the negative conductive platen 61 is made of copper or the like.

Preferably, the sealing member is a sealing ring with two outer flanges, that is, the upper side and the lower side of the sealing ring respectively extend outwards to form the outer flanges, the outer flange above is positioned between the lower end face of the first column section and the upper surface of the top cover, and the outer flange below is positioned between the connecting face and the conductive pressing plate, so that double-layer sealing is realized, and the sealing effect is better.

In this embodiment, the lower surface of the conductive pressing plate is provided with a groove communicated with the fixing hole 63, the groove is located on one side, away from the center of the conductive pressing plate, of the fixing hole 63, the fixing claw 14 is embedded into the groove after being bent, the lower surface of the fixing claw 14 after being bent and the lower surface of the conductive pressing plate are located on the same plane, so that the fixing claw 14 and the conductive pressing plate are conveniently electrically connected with the electrode lug, and the electrical connection is guaranteed to be more reliable. Preferably, the number of the fixing claws 14 and the fixing holes 63 is four.

In this embodiment, the cap plate further includes an insulating plate 50, the insulating plate 50 being disposed on the lower surface of the top cap 20, the insulating plate 50 having a through hole for mounting the conductive pressure plate and an insulating protrusion 51 extending toward the center of the through hole, the insulating protrusion 51 being engaged with the connection surface, the upper surface of the conductive pressure plate, and the sealing member. Insulation board 50 makes top cap 20 and the shell electrical insulation of electric core, promotes its security, and in insulating protruding 51 embedding conductive pressing plate and top cap 20 complex space, at the crooked in-process of stationary dog 14 atress, insulating protruding 51 is compressed tightly, and then makes insulation board 50 fixed compress tightly, also can fix insulation board, conductive pressing plate when fixing the utmost point post through stationary dog 14, simplifies the overall structure of apron, reduce cost.

In this embodiment, the cover plate further comprises a conductive connecting sheet, the conductive connecting sheet is arranged on the lower surface of the conductive pressing plate, and the conductive connecting sheet is welded with the conductive pressing plate and simultaneously welded with the lower surface of the bent fixing claw 14, so that the riveting strength of the fixing claw and the conductive pressing plate is further enhanced. Specifically, the number of the conductive connecting pieces is two, and the conductive connecting pieces are respectively a positive conductive connecting piece 72 and a negative conductive connecting piece 71, the positive conductive pressing plate 62 of the positive conductive connecting piece 72 is matched, the negative conductive connecting piece 71 is matched with the negative conductive pressing plate 61, the positive conductive connecting piece 72 is made of aluminum or the like, and the negative conductive connecting piece 71 is made of copper or the like.

In this embodiment, the cover plate further includes an upper ring body, the upper ring body surrounds the upper portion of the pole and is matched with the upper surface of the top cover 20 and the sealing element, and the upper ring body can seal a gap between the pole and the top cover to play a role in sealing and dust prevention. Specifically, the inner wall of the upper ring body is provided with a transverse protrusion extending towards the center of the first mounting hole 21, the transverse protrusion is located between the lower end face of the first column section and the upper surface of the top cover 20, the transverse protrusion is pressed between the lower end face of the first column section and the upper surface of the top cover 20 while fixing the pole, and the upper ring body is fixed more firmly and reliably. It will be appreciated that, as an alternative embodiment, the upper ring body may not be provided and may be integrated by the sealing member, i.e. the upper ring body is removed, and the effect of the pole fastening seal can also be achieved.

Preferably, the upper ring body can wrap the pole well through injection molding, and is filled in a gap between the top cover and the pole, and the injection molding technology is mature, the processing is simple, and the improvement of the working efficiency is facilitated. The upper ring body can be injected on the surface of the pole, and can also be assembled after being separately injected and molded.

Specifically, the number of the upper ring bodies is two, the upper ring bodies are respectively a conductive ring 82 and an insulating ring 81, the conductive ring 82 is matched with the positive pole 12, the resistivity of the conductive ring 82 is 1-10000 Ω, the insulating ring 81 is matched with the negative pole 11, and the insulating ring 81 can prevent the pole from being mistakenly connected with an external circuit to cause the short circuit of the top cover 20 and the external circuit.

In this embodiment, the first sealing member 31, the second sealing member 32, the insulating plate 50, and the insulating ring 81 are made of plastic.

In this embodiment, the cover plate further includes an explosion-proof structure 40, the top cover 20 has a second mounting hole 23, the explosion-proof structure 40 is mounted at the second mounting hole 23, and the explosion-proof structure 40 explodes when the gas pressure inside the battery increases due to gas generation, so as to release the pressure inside the battery, prevent the battery from exploding due to excessive internal gas pressure, and improve the safety of the battery.

Specifically, the explosion-proof structure 40 includes an explosion-proof valve 42 and an explosion-proof membrane 41, the explosion-proof membrane 41 is disposed above the explosion-proof valve 42, the explosion-proof valve 42 is a metal sheet, preferably an aluminum sheet, the explosion-proof membrane 41 can be made of a plastic material such as a blue membrane, and the explosion-proof membrane 41 covers the explosion-proof valve 42 for protecting the explosion-proof valve 42. The shapes of the explosion-proof membrane 41 and the explosion-proof valve 42 are matched with the structure of the second mounting hole 23, and the mounting positions of the second mounting hole 23 and the explosion-proof structure 40 can be adjusted correspondingly according to different batteries.

As shown in fig. 1 to 5, the assembly process of the cover plate is as follows:

the positive pole 12 with the fixing claw 14 penetrates through a hole on the conductive ring 82, a hole on the second sealing element 32, a positive mounting hole on the top cover 20, a hole on the insulating plate 50 and a fixing hole 63 on the positive conductive pressing plate 62 from top to bottom, then under the extrusion of an external force, the fixing claw 14 bends towards the edge of the fixing hole 63 on the positive conductive pressing plate 62 and is embedded into a groove on the positive conductive pressing plate 62 to be riveted with the positive conductive pressing plate 62, and meanwhile, the effects of fastening and sealing the positive pole 12 and fastening the insulating plate are achieved. In addition, the positive conductive connecting sheet 72 is welded with the fixing claw 14 and the positive conductive pressing plate 62, and the fastening and sealing effects of the positive pole are further improved.

The negative pole 11 with the fixing claws 14 penetrates through the hole on the insulating ring 81, the hole on the first sealing element 31, the negative pole mounting hole on the top cover 20, the hole on the insulating plate 50 and the fixing hole 63 on the negative conductive pressure plate 61 from top to bottom, then under the extrusion of external force, the fixing claws 14 bend towards the edge of the fixing hole 63 on the negative conductive pressure plate 61 and are embedded into the grooves on the negative conductive pressure plate 61 to be riveted with the negative conductive pressure plate 61, and meanwhile, the effects of fastening and sealing the negative pole and fastening the insulating plate 50 are achieved. In addition, the negative conductive connecting sheet 71 is welded with the fixed claw 14 and the negative conductive pressure plate 61, and the fastening and sealing effects of the negative pole are further improved.

The fixing claws 14 of the positive electrode posts 12 and the fixing claws 14 of the negative electrode posts 11 may be pressed by external force at the same time to fasten the poles, or may be pressed by external force at the same time to fasten the poles.

The utility model also provides a battery, it includes: the cover plate is described above.

In this embodiment, the battery further includes a casing and a plurality of battery cells, the casing has an opening, the cover plate is covered at the opening, the casing and the cover plate enclose a containing cavity for containing the battery cells, the cover plate is used for sealing the casing of the battery, and the cover plate is connected with the casing in a sealing manner by welding.

As shown in fig. 1 to 5, the cover plate includes an upper ring body, a sealing member, a pole, a top cap 20, an insulating plate 50, a conductive pressing plate, a conductive connecting sheet, and an explosion-proof structure. The number of the upper ring bodies is two, and the upper ring bodies are respectively a conductive ring 82 and an insulating ring 81; the number of the poles is two, and the poles are respectively a positive pole 12 and a negative pole 11; the top cover 20 is provided with a positive mounting hole, a negative mounting hole, a second mounting hole 23 and a liquid injection hole 24; the insulating plate 50 is provided with a positive pole column hole, a negative pole column hole, an explosion-proof mounting hole and a liquid injection hole; the number of the conductive pressing plates is two, and the conductive pressing plates are respectively a positive conductive pressing plate 62 and a negative conductive pressing plate 61; the number of the conductive connecting sheets is two, and the conductive connecting sheets are respectively a positive conductive connecting sheet 72 and a negative conductive connecting sheet 71; the vent structure 40 includes a vent valve 42 and a vent membrane 41.

As shown in fig. 3, the positive post 12 is riveted to the positive conductive pressing plate 62 by the fixing claw 14. Under the extrusion of external force, the fixed jaw 14 is bent towards the edge of the positive mounting hole and is embedded into a groove on the positive conductive pressing plate 62, the upper surfaces of the positive pole 12 and the top cover 20 are sealed through the conductive ring 82 and the second sealing element 32, the positive pole 12 and the positive mounting hole are sealed through the second sealing element 32, the positive conductive pressing plate 62 and the lower surface of the top cover 20 are sealed and insulated through the second sealing element 32 and the insulating plate 50, the positive conductive connecting sheet 72 is welded with the fixed jaw 14 and the positive conductive pressing plate 62 at the same time, and the riveting strength of the fixed jaw 14 and the positive conductive pressing plate 62 is further enhanced.

As shown in fig. 4, the negative electrode tab 11 is riveted to the negative conductive pressure plate 61 via the fixing claw 14. The fixed jaw 14 is under external force extrusion, the fixed jaw 14 is crooked to negative pole mounting hole edge, and the recess on the embedding burden conducting pressure plate 61, negative pole post 11 seals through insulating ring 81 with the upper surface of top cap 20, first sealing member 31, negative pole post 11 seals through first sealing member 31 with the negative pole mounting hole, burden conducting pressure plate 61 seals and insulates through first sealing member 31 and insulation board 50 with the lower surface of top cap 20, burden conducting connection piece 71 welds with fixed jaw 14 and burden conducting pressure plate 61 simultaneously, further strengthen the riveting intensity of fixed jaw 14 and burden conducting pressure plate 61.

As shown in fig. 2 to 4, the first column segment 131 of the positive column 12 and the negative column 11 protrudes from the second column segment 132, that is, the connection surface between the positive column 12 and the conductive ring 82 and the second sealing member 32 has a boss, and the connection surface between the negative column 11 and the insulating ring 81 and the first sealing member 31 has a boss, so as to cooperate with the top cover 20 to press the conductive ring 82, the second sealing member 32, the insulating ring 81 and the first sealing member 31, respectively, thereby achieving the effect of sealing and fastening.

As shown in fig. 2 to 4, the conductive ring 82 surrounds the side of the projection of the positive post 12, and similarly, the insulating ring 81 surrounds the side of the projection of the negative post 11, thereby preventing the top cap 20 from short-circuiting with the positive post 12 and the negative post 11.

As shown in fig. 2 to 4, the compression amount of second sealing member 32 after being forced on the boss of positive post 12 and the upper surface of top cap 20 is equal to or greater than 30%, and the compression amount of second sealing member 32 after being forced on fixing claw 14, positive conductive pressure plate 62 and the lower surface of top cap 20 is equal to or greater than 30%; the compression amount of the first sealing member 31 after the boss of the negative pole post 11 and the upper surface of the top cover 20 are stressed is more than or equal to 30%, and the compression amount of the first sealing member 31 after the fixing claw 14, the negative conductive pressure plate 61 and the lower surface of the top cover 20 are stressed is more than or equal to 30%, so that the sealing effect is improved.

As shown in fig. 2 to 4, the insulating protrusion 51 of the insulating plate 50 is inserted into the gap where the conductive pressing plate and the top cap are fitted, and then the insulating plate 50 is pressed and fixed during the forced bending of the fixing jaw 14.

As shown in fig. 2 to 4, the positive conductive tab 72 is bonded to the fixing tab 14 of the positive post 12 and the positive conductive pressure plate 62, and the negative conductive tab 71 is bonded to the fixing tab 14 of the negative post 11 and the negative conductive pressure plate 61.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1. the polar post with the boss and the fixing claw is adopted, the polar post is assembled from top to bottom, the fixing claw is riveted on the pressing plate under external force, and further the polar post is fastened, the fixing claw of the polar post is riveted with the top cover through the conductive pressing plate, welding and injection molding technologies are not needed, the processing technology is simple, creep deformation caused by welding heat on a sealing ring or upper plastic is avoided, the purchasing cost and production place arrangement problems of the injection molding machine are solved, and quality improvement and cost reduction are realized; meanwhile, the production process is simplified, and the aim of improving the production efficiency is fulfilled;

2. the annular sealing element is adopted, the upper flange and the lower flange of the sealing element are respectively subjected to the axial force of the lug boss of the pole and the axial force of the conductive pressing plate, the sealing element can achieve a good sealing effect under the condition that the pole is subjected to tensile force or pressure, and the sealing reliability of the pole is improved;

3. the conductive connecting sheet is adopted to be jointed and welded with the conductive pressing plate and the fixing claws, so that the technical scheme of the conductive connecting sheet with the boss in the prior art is avoided, the connecting function of the connecting sheet is achieved, the riveting strength for fixing the conductive pressing plate and the reliability of the pole are improved, and the fastening and sealing effect of the pole is further improved;

4. the fixing claw of the pole is bent towards the edge of the fixing hole under the external force riveting pressure, and is embedded into the groove on the conductive pressing plate, the lower surface of the deformed fixing claw and the lower surface of the conductive pressing plate are in the same plane, and the upper surface of the extruded conductive pressing plate is attached to the groove surface of the pole between the fixing claws, so that the conductive connection between the conductive pressing plate and the pole is effectively realized;

5. when the upper surface and the lower surface of the top cover of the sealing element are pressed by the pole and the conductive pressing plate, the compression amount is more than or equal to 30 percent, and the sealing effect is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (12)

1. A pole, comprising: the pole column comprises a pole column body (13) and a plurality of fixing claws (14), wherein the fixing claws (14) are arranged on the pole column body (13), and the fixing claws (14) are suitable for being bent in a direction away from the center of the pole column body (13) under the action of external force so as to fix the pole column on a top cover (20).

2. A pole according to claim 1, characterized in that the pole cylinder (13) is provided with the fixing claws (14) on its upper and/or lower surface.

3. The pole according to claim 2, characterized in that the fixing jaw (14) is arranged on the lower surface of the pole cylinder (13), the pole cylinder (13) comprising a first column section (131) and a second column section (132), the outer diameter of the first column section (131) being larger than the outer diameter of the second column section (132), the lower end surface of the first column section (131) forming a compression surface for compressing the seal.

4. A cover plate, comprising: a top cover (20) and a pole of any of claims 1 to 3, the top cover (20) having a first mounting hole (21), the pole being mounted in the first mounting hole (21).

5. The cover plate according to claim 4, further comprising a seal arranged between the pole and the top cover (20) to seal the top cover (20) and the pole.

6. The cover plate according to claim 5, wherein the first mounting hole (21) comprises an upper hole section, a lower hole section and a connecting surface for connecting the upper hole section and the lower hole section, and the fixing claw (14) of the pole is bent and arranged corresponding to the connecting surface.

7. The cover plate according to claim 6, further comprising a conductive pressing plate, wherein the conductive pressing plate is provided with a fixing hole (63) for the fixing claw (14) to penetrate through, the fixing claw (14) is adapted to penetrate through the fixing hole (63) and is pressed on the conductive pressing plate after being bent towards a direction away from the center of the pole cylinder (13) under the action of an external force, so as to press the sealing element and the conductive pressing plate.

8. The cover plate according to claim 7, wherein a groove communicated with the fixing hole (63) is formed in the lower surface of the conductive pressure plate, the groove is formed in one side, away from the center of the conductive pressure plate, of the fixing hole (63), and the fixing claw (14) is embedded into the groove after being bent.

9. The cap plate according to claim 7, further comprising an insulating plate (50), wherein the insulating plate (50) is disposed on a lower surface of the cap (20), wherein the insulating plate (50) has a through hole for mounting the conductive pressure plate and an insulating protrusion (51) extending toward a center of the through hole, and wherein the insulating protrusion (51) is engaged with the connection surface, an upper surface of the conductive pressure plate, and the sealing member.

10. The cover plate of claim 7, further comprising a conductive tab disposed on a lower surface of the conductive pressure plate.

11. The cover plate of claim 5, further comprising an upper ring body surrounding the upper portion of the pole and engaged with the upper surface of the top cap (20), the sealing member.

12. A battery, comprising: the cover sheet of any one of claims 4 to 11.

Images