CN213752839U

CN213752839U - Battery with a battery cell

Info

Publication number: CN213752839U
Application number: CN202023232006.1U
Authority: CN
Inventors: 姬嘉帅; 于贺; 高顺航; 娄佳训; 夏天军; 于东朋
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-07-20
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a battery, include: the inner side surface of the cover body is provided with a positioning part; the connecting piece comprises a first section and a second section, the first section and the second section of the connecting piece are connected, the first section of the connecting piece and the cover body are positioned by the positioning part, and the first section of the connecting piece is fixedly connected with the cover body. According to the utility model discloses battery can improve the stability of battery.

Description

Battery with a battery cell

Technical Field

The utility model relates to a power technical field, in particular to battery.

Background

The overall design of the cylinder electric core of the related art is that the pole group and the cover plate are connected through the connecting sheet, when the connecting sheet and the cover plate are welded by laser, the pole of the cover plate is basically circular or square, the connecting sheet is circular or square, the welding process is not provided with a related positioning device, the cover plate and the connecting sheet are staggered when welding is extremely easy to occur, the production consistency of the whole cylinder is poor, batch problems exist, the more serious connecting sheet after bending is inaccurate in positioning, the cylinder shell is extremely easy to contact, the battery short circuit is caused, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery can improve the stability of battery.

According to the utility model discloses battery, include: the inner side surface of the cover body is provided with a positioning part; the connecting piece comprises a first section and a second section, the first section and the second section of the connecting piece are connected, the first section of the connecting piece and the cover body are positioned by the positioning part, and the first section of the connecting piece is fixedly connected with the cover body.

According to the utility model discloses battery can improve the stability of battery.

In addition, according to the battery of the above embodiment of the present invention, the following additional technical features may also be provided:

optionally, the positioning portion includes a blocking rib configured to have an open ring shape, and the first section of the connecting piece is embedded inside the blocking rib and positioned by the blocking rib.

Optionally, the rib is configured in a shape that a width dimension of at least a part of the inner space is larger than a width dimension of the opening, the first section of the connecting piece is matched with the inner space of the rib, and a width dimension of a joint of the first section and the second section is not larger than the width dimension of the opening.

Optionally, the retaining rib is configured in a major arc shape, the first section of the connecting piece is configured in a semicircular shape, and the radial dimension of the first section of the connecting piece is the same as the inner diameter of the retaining rib.

Optionally, the second section of the connecting tab is shaped to have a width dimension that is no greater than a width dimension of the opening.

Optionally, location portion is still including being annular muscle, just annular muscle is along the perpendicular to the direction arch of lid, keep off the muscle connect in annular muscle keep away from the one side of lid, just keep off the muscle edge annular muscle extends.

Optionally, the cover body includes a cover plate and a pole, the cover plate is provided with a pole hole, and the pole hole penetrates through the cover plate along a thickness direction of the cover plate; the pole column is installed on the cover plate and penetrates into the pole column hole, wherein the annular rib is arranged on the inner side face of the cover plate, one end of the pole column is embedded in the annular rib, and the blocking rib is higher than the end face of one end of the pole column.

Optionally, a boss is arranged on the inner side surface of the cover plate, the bosses are arranged at two ends of the opening of the blocking rib, one surface of each boss is flush with the inner peripheral surface of the blocking rib, and the boss is higher than the blocking rib relative to the inner side surface of the cover plate.

Optionally, the apron is including range upon range of setting and fixed connection's smooth aluminum sheet and lower plastic, be equipped with the edge down on the plastic the thickness direction of plastic runs through down the explosion-proof hole of plastic, smooth aluminum sheet is equipped with the edge the thickness direction of smooth aluminum sheet runs through the mounting hole of smooth aluminum sheet, be equipped with explosion-proof valve on the smooth aluminum sheet, explosion-proof valve install in the mounting hole covers explosion-proof hole, deviating from of explosion-proof valve one side subsides of explosion-proof hole has explosion-proof paster.

Optionally, the first section surface of the connecting piece is provided with a nickel plating layer.

Drawings

Fig. 1 is a schematic view illustrating the cooperation of the cover and the connecting piece according to an embodiment of the present invention.

Fig. 2 is a view of a cover in one orientation according to an embodiment of the present invention.

Fig. 3 is a view of the cover of an embodiment of the present invention in another orientation.

Fig. 4 is a plan view of a cover according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view of section a-a in fig. 4.

Fig. 6 is a cross-sectional view of section B-B of fig. 4.

Fig. 7 is a bottom view of the cover according to an embodiment of the present invention.

Fig. 8 is an exploded view of the cover according to an embodiment of the present invention.

Fig. 9 is a schematic view of a pole of the cover according to an embodiment of the present invention.

Reference numerals:

a cover body 10, a smooth aluminum sheet 11, a lower plastic 12, a sealing ring 13, a pole post 14, an explosion-proof valve 15, an explosion-proof patch 16, a fixing piece 17, a boss 101, a pole post hole 102, an opening hole 103, a liquid injection hole 104, a column body part 141, a flange part 142, a positioning groove 143, a second positioning part 111, a mounting hole 112, an explosion-proof hole 121, an annular rib 105, a blocking rib 106,

the connecting piece 20, the first section 21, the second section 22, the width direction W-W and the thickness direction T-T.

Detailed Description

In the related batteries, the performance of lithium ion batteries (lithium ion batteries and lithium high polymer batteries) is the best, and the energy of the lithium ion battery with the same mass is 4-6 times that of a lead-acid battery and 2-3 times that of a nickel-hydrogen battery. The price is slightly expensive compared with the current price, and the price disadvantage is mainly relative to a lead-acid storage battery and the like. The main raw material of the lithium ion battery is lithium, and the lithium ore resources in China are rich; lithium ions are also present in seawater and can be extracted from seawater by solar energy in the future. In addition, the lithium ion battery has the potential of recycling, and the problem of the requirement on raw materials can be solved. The price of the final lithium ion battery decreases after large-scale commercialization. In fact, more and more automobile manufacturers at home and abroad select the lithium ion battery as the power battery of the electric automobile, and the research on the lithium ion battery technology is continuously broken through. The twelve-five special project of the scientific and technological development of the electric automobile in China indicates that the development of the power battery industry for the automobile with the lithium ion power battery as the key point is promoted, so that the power battery industry has international competitive power.

Lithium ion batteries are mainly classified into three types, namely square, cylindrical and soft packages at present; the models of the cylindrical battery cell mainly comprise 18650 models and 21700 models, and the development of the large-size cylindrical battery cell is less; the advantages of the large cylinder are mainly reflected in that 1) the new energy automobile can have higher charge-discharge multiplying power and faster acceleration; 2) the energy density is higher, and the endurance mileage can be improved; 3) the battery cost can be remarkably reduced;

but the small cylindrical cells such as traditional 18650/21700 that big cylindrical cell is relative are not enough to be expressed in: 1) the consistency of large cells is more difficult to control; 2) the specific energy is improved, the components of the battery cell are more active, if the single large battery cell is more harmful due to thermal runaway, the conventional large cylindrical battery cell has no stable structural design scheme, and the improvement of the safety performance is a great technical difficulty. In the prior art, the whole design of the conventional cylindrical battery cell is that a pole group and a cover plate are connected through a connecting sheet, when the connecting sheet and the cover plate are welded by laser, because the pole of the cover plate is basically round or square, the connecting sheet is round or square, and a welding process has no related positioning device, the cover plate and the connecting sheet are easily dislocated during welding, so that the whole cylinder has poor production consistency and batch problems, and more seriously, the bent connecting sheet is easily contacted with a cylindrical shell to cause short circuit of the battery due to inaccurate positioning, and potential safety hazards exist;

therefore, the utility model provides a battery can improve the security performance of battery effectively.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1, the battery according to the embodiment of the present invention includes: the inner side surface of the cover body 10 is provided with a positioning part; the connecting piece 20 comprises a first section 21 and a second section 22, the first section 21 and the second section 22 of the connecting piece 20 are connected, the first section 21 of the connecting piece 20 and the cover body 10 are positioned by the positioning part, and the first section 21 of the connecting piece 20 is fixedly connected with the cover body 10. In the assembly process of the battery, the connecting sheet 20 may be connected to a predetermined position on the cover 10 by the positioning function of the positioning portion to achieve the predetermined positioning of the positioning sheet, and then the connecting sheet 20 and the cover 10 are fixedly connected. Through the positioning function of the positioning portion, the connecting sheet 20 can be matched with a preset position on the cover body 10, and in the process of fixedly connecting the connecting sheet 20 and the cover body 10, the matching precision and the installation efficiency of the connecting sheet 20 and the cover body 10 can be improved through the preset positioning function of the positioning portion.

According to the utility model discloses battery can improve the connection precision and the connection efficiency of connection piece 20 and lid 10 effectively, and the hookup location of connection piece 20 after connecting the completion on lid 10 can be expected moreover, has guaranteed the yields of the battery of equipment completion effectively, has improved the stability and the security of battery, reduces the potential safety hazard of battery.

In addition, the battery further includes a pole group, where the pole group may be an electrode of the battery cell, and the pole group may be one electrode (positive electrode or negative electrode), or two electrodes (positive electrode and negative electrode), or more electrodes.

The utility model provides a location portion can the form of multiple difference, for example set up the connecting hole on spliced pole, connection piece 20 on lid 10, through the cooperation of a set of or multiunit connection piece 20 and linkage, can realize the stable cooperation of connection piece 20 and lid 10. In addition, the utility model discloses in can also realize the prepositioning of connection piece 20 and lid 10 through other forms the utility model discloses an in some embodiments, location portion is including keeping off muscle 106, keeps off muscle 106 and is constructed into to have the open-ended annular, and the first section 21 of connection piece 20 is embedded in keeping off muscle 106 inboard and is fixed a position by keeping off muscle 106. By arranging the retaining rib 106, the connecting sheet 20 can be quickly positioned at a preset position on the cover body 10, the connecting efficiency of the connecting sheet 20 and the cover body 10 is improved, and the assembling efficiency and the assembling precision of the battery are effectively improved.

Further, the rib 106 is configured in such a manner that the width dimension of at least a part of the inner space is larger than the width dimension of the opening, the first segment 21 of the connecting piece 20 is fitted into the inner space of the rib 106, and the width dimension of the joint of the first segment 21 and the second segment 22 is not larger than the width dimension of the opening. When the connecting piece 20 is matched with the blocking rib 106, the blocking rib 106 is in a shape capable of limiting the rotation of the connecting piece 20 relative to the blocking rib 106, so that the connecting position precision of the connecting piece 20 is further improved, and the stability and the safety of the battery are improved.

In addition, the blocking rib 106 of the present invention may be a ring shape having an opening or a ring shape (e.g., a rectangle, etc.) having other shapes. In addition, the width of the junction between the first section 21 and the second section 22 may be set to be the same as the width of the opening, so that the position of the connecting piece 20 with respect to the cover body 10 can be accurately determined.

Alternatively, the rib 106 is configured in a major arc shape, the first segment 21 of the coupling piece 20 is configured in a semicircular shape, and the radial dimension of the first segment 21 of the coupling piece 20 is the same as the inner diameter of the rib 106. In other words, the blocking rib 106 extends along the circular ring shape, and the central angle corresponding to the blocking rib 106 is greater than 180 °, and the first section 21 of the connecting piece 20 is also provided as a circular sheet with a notch, and the central angle corresponding to the circular sheet of the first section 21 of the connecting piece 20 is greater than 180 °, and the central angle corresponding to the circular sheet of the first section 21 of the connecting piece 20 can be not smaller than the central angle corresponding to the blocking rib 106. In addition, the radial dimension of the first section 21 of the connecting piece 20 is the same as the inner diameter of the stop rib 106, or the radial dimension of the first section 21 of the connecting piece 20 is slightly smaller than the inner diameter of the stop rib 106, wherein the radial dimension of the first section 21 can be the diameter of the first section 21, and the inner diameter of the stop rib 106 is the diameter of the inner circumferential edge of the stop rib 106; alternatively, the radial dimension of the first segment 21 may be the radius of the first segment 21, and the inner diameter of the rib 106 may be the radius of the inner circumferential edge of the rib 106.

Optionally, the second section 22 of the connecting tab 20 is shaped to have a width dimension no greater than the width dimension of the opening. Therefore, the first section 21 and the second section 22 of the connecting piece 20 can be quickly identified, so that the connecting piece 20 can be quickly connected with the cover body 10, a foolproof effect can be achieved, and the production efficiency and the precision of the battery can be further improved.

Optionally, the positioning portion further includes an annular rib 105, the annular rib 105 protrudes in a direction perpendicular to the cover 10, the blocking rib 106 is connected to a side of the annular rib 105 away from the cover 10, and the blocking rib 106 extends along the annular rib 105. Further improving the stability of the battery.

Optionally, the cover 10 includes a cover plate and a post 14, the cover plate is provided with a post hole 102, and the post hole 102 penetrates through the cover plate along a thickness direction of the cover plate; the post 14 is mounted on the cover plate and penetrates into the post hole 102, wherein the annular rib 105 is arranged on the inner side surface of the cover plate, one end of the post 14 is embedded in the annular rib 105, and the blocking rib 106 is higher than the end surface of one end of the post 14. Through the setting of annular muscle 105 and fender muscle 106, can align fast and the cooperation with connection piece 20 and utmost point post 14 to improve the connection efficiency of connection piece 20 and utmost point post 14, guarantee the assembly precision and the assembly efficiency of battery.

Optionally, a boss 101 is disposed on an inner side surface of the cover plate, bosses 101 are disposed at two ends of an opening of the rib 106, one surface of the boss 101 is flush with an inner circumferential surface of the rib 106, and the boss 101 is higher than the rib 106 relative to the inner side surface of the cover plate.

Optionally, the cover plate includes a smooth aluminum sheet 11 and a lower plastic 12 which are stacked and fixedly connected, an explosion-proof hole 121 which penetrates through the lower plastic 12 along the thickness direction of the lower plastic 12 is formed in the lower plastic 12, the smooth aluminum sheet 11 is provided with a mounting hole 112 which penetrates through the smooth aluminum sheet 11 along the thickness direction of the smooth aluminum sheet 11, an explosion-proof valve 15 is arranged on the smooth aluminum sheet 11, the explosion-proof valve 15 is mounted in the mounting hole 112 and covers the explosion-proof hole 121, and an explosion-proof patch 16 is attached to one side of the explosion-proof valve 15, which is far away from the explosion-proof hole 121.

Optionally, the first section 21 of the connecting piece 20 is provided with a nickel plating layer on the surface.

The utility model mainly aims at the problems of batch production of cylindrical cells and the risk of short circuit safety caused by the non-positioning structural design when the anode and cathode connecting pieces 20 of the large cylindrical cell are welded with the cover plate in the related technology; the utility model discloses in the aspect of the design of well electric core: the cylindrical battery cell is designed by adding circular positioning structures (blocking ribs 106) to the positive and negative cover plates through adding circular arc plastics, and meanwhile, the welding direction is guaranteed not to be out of question, the welding process of the connecting sheet 20 and the cover plates is guaranteed, the performance of the battery cell is not affected, and the appearance size of the battery cell is not affected.

The utility model provides a battery mainly includes apron, connection piece 20, utmost point group etc. and apron, connection piece 20, utmost point group are connected to together through the welding mode, and the apron then is connected to together through the mode of moulding plastics rubber coating by utmost point post 14, smooth aluminum sheet 11, sealing washer 13, mounting 17 (can fix for modes such as injection moulding rubber coating shaping, riveting, welding), lower plastic 12.

The connecting sheet 20 of the utility model is designed into a sheet shape, the two side edges of the nickel plating on the surface of the first section 21 of the connecting sheet 20 are in a circular arc shape, and the radius of the circular arc is the same as or close to that of the related positioning structure; the edge of the non-bent side (semicircle) of the plastic 12 under the cover plate is heightened by a corresponding height, and the other side is still flush with the surface of the cover plate pole 14; then the connecting sheet 20 is placed in the positioning position for welding, which can not only ensure that the welding deviation phenomenon does not occur, but also avoid the problem of welding direction dislocation.

A positioning circular arc table with the height (0-50mm) is added on one side of the edge of the plastic 12 pole post 14 under the cover plate, and the other side is still flush with the surface of the cover plate pole post 14, so that the connecting sheet 20 can be accurately positioned, the bending direction is correct after welding is finished, welding deviation and welding dislocation are avoided, corresponding assembly errors are avoided, and the consistency and safety performance of the battery cell are improved; the circular hole design is carried out on the welding side of the connecting sheet 20 and the pole group, so that the accurate positioning of the connecting sheet 20 and the pole group is ensured, and the welding deviation or dislocation condition is avoided; the height of the pole 14 is 2 mm; circular arc-shaped bosses 101 (the shape or the number is not limited, the angle of the circular arc is not limited, the bosses 101 can be square or circular, the number can be 1-10), the gap between the cover plate and the electrode group is reduced, the electrode group is fixed, the electrode group is ensured not to move in the battery cell, the electrode group is ensured to be fixed in the use process of the battery cell, the situation that the electrode lug of the electrode group is pulled is avoided, and the safety of the battery is improved; holes or openings (with unlimited shape and quantity) are punched on the arc bosses 101 of the positive and negative cover plates, so that the liquid injection amount of the battery is not influenced, and meanwhile, no electrolyte is left; the edge of the boss 101 is chamfered to prevent scratching a pole group or a pole lug; the cylindrical cover plate is finally produced by integrally injection molding through a pole post 14, a polished aluminum sheet 11, an explosion-proof valve 15 and lower plastic 12, the explosion-proof valve 15 is arc-shaped, and an explosion-proof valve 15 patch is attached to the upper part of the explosion-proof valve 15; the positive cover plate is provided with a liquid injection hole 104, the edge of one side is encapsulated by right-angle rubber, and the encapsulation of the positive cover plate and the negative cover plate is in a symmetrical ear shape; array-shaped round holes are additionally formed in the position of the explosion-proof valve 15 of the plastic 12 below the positive and negative cover plates, so that the explosion-proof valve 15 is normally exploded when the safety problem of the battery cell occurs;

a positioning arc table with the height (0-50mm) is added on one side of the edge of the plastic 12 pole post 14 under the cover plate, and the other side of the positioning arc table is still flush with the surface of the cover plate pole post 14, so that the connecting sheet 20 can be accurately positioned, the bending direction after welding is finished is correct, welding deviation and welding dislocation are avoided, and the bending direction after welding is finished is wrong, so that corresponding assembly errors are avoided, and the consistency and safety performance of the battery cell are improved;

additionally, the utility model also provides a lid 10, include: the cover plate is provided with a boss 101 and a pole hole 102, the pole hole 102 penetrates through the cover plate along the thickness direction of the cover plate, and the boss 101 is arranged on the inner side surface of the cover plate. The post 14 is mounted on the cover plate and passes through the post hole 102.

The inner side and the outer side of the cover plate are relative to the battery, the cover plate covers the shell of the battery, one side of the cover plate facing the inner space of the shell is the inner side of the cover body 10, and the surface of the inner side of the cover body 10 is the inner side surface of the cover body 10; the side of the cover plate facing away from the inner space of the housing is the outer side of the cover 10, and the surface of the outer side of the cover 10 is the outer side of the cover 10. The boss 101 arranged on the cover plate can reduce the gap between the cover plate and the pole group, and even can enable the boss 101 to abut against the pole group, so that the overall stability of the battery can be improved

Combine fig. 1 to fig. 9 according to the utility model discloses a lid 10 for battery can improve the stability of battery effectively, when the battery meets vibration scheduling problem, through boss 101's support and limiting displacement, can keep utmost point group can remain stable, avoids utmost point group to take place great vibrations, and then avoids because the vibration of utmost point group leads to the battery to break down, has improved the stability and the security of battery, reduces the potential safety hazard of battery.

The utility model discloses a apron can be integrated into one piece's structure, also can be for dividing the body structure, and the apron can with utmost point post 14 between insulating.

In some embodiments of the present invention, the cover plate includes a smooth aluminum sheet 11 and a lower plastic 12 which are stacked and fixedly connected, the boss 101 is formed on the lower plastic 12 and protrudes toward a direction away from the smooth aluminum sheet 11, and the pole hole 102 penetrates through the smooth aluminum sheet 11 and the lower plastic 12. The design, production and assembly of the cap body 10 can be facilitated by the separate structure of the cap plate, and the stability and safety of the battery can be effectively improved.

In addition, the boss 101 can be integrally formed with the lower plastic 12, the lower plastic 12 and the boss 101 can be formed by injection molding or the like, the forming efficiency of the cover plate is effectively improved, and the boss 101 is made of plastic materials, so that the insulation between the boss 101 and the pole group can be effectively improved, and the insulation between the boss 101 and the pole group can be effectively improved

Optionally, the lower plastic 12 further includes a plate portion provided with a fitting hole, the boss 101 includes a surrounding plate and a bottom plate, the surrounding plate is configured in a tubular shape, one end of the surrounding plate is connected to the surrounding edge of the fitting hole, and the other end of the surrounding plate is covered by the bottom plate. The weight of plastic 12 can be reduced down, and battery weight is lightened, in addition, the space that boss 101 took can also be reduced, space utilization in the battery is improved.

Optionally, the bottom plate is provided with an opening penetrating through the bottom plate along the thickness direction of the bottom plate. Therefore, the space suitable for filling in the battery can be increased, and the capacity of the battery can also be increased.

In order to facilitate the inside expend with heat and contract with cold of battery to and avoid the battery to explode risk such as, explosion-proof structure has been set up in this application, improve the stability and the security of battery through setting up explosion-proof structure, as figure 8 in some embodiments of the utility model, be equipped with down the explosion-proof hole 121 that plastic 12 runs through down along the thickness direction of plastic 12 on the lower plastic 12, light aluminum sheet 11 is equipped with the mounting hole 112 that runs through light aluminum sheet 11 along the thickness direction of light aluminum sheet 11, is equipped with explosion-proof valve 15 on the light aluminum sheet 11, and explosion-proof valve 15 is installed in mounting hole 112 and is covered explosion-proof hole 121, and explosion-proof paster 16 is attached to one side that deviates from explosion-proof hole 121 of explosion-proof valve 15. Thereby effectively improving the safety and stability of the battery.

The utility model discloses in can set up a boss 101, also can set up a plurality of bosss 101 and improve the location effect to utmost point group, particularly, be equipped with on the apron along a plurality of bosss 101 or the apron that the circumference of utmost point post hole 102 set up and distribute in two bosss 101 of the relative both sides of utmost point post hole 102. Therefore, the positioning effect of the electrode group can be effectively improved, and the stability and the safety of the battery are further effectively improved. Additionally, the utility model provides a apron can also be set to including a boss 101, and wherein, this boss 101 can set to the annular shape around utmost point post 14, also can set up to other shapes, only need can realize through boss 101 location utmost point group can.

Optionally, the end periphery of the boss 101 is chamfered or rounded. Therefore, the end part of the boss 101 can be prevented from scratching the electrode group, and the stability of the battery is effectively improved.

Additionally, the utility model provides a boss 101 can set up to different shapes, according to the shape of utmost point group and required limit structure requirement, can set up boss 101 into square, circular or along the arc that the direction that encircles utmost point post hole 102 extends etc..

Optionally, a liquid injection hole 104 is formed on the cover plate, and the liquid injection hole 104 penetrates through the cover plate.

With reference to fig. 1 to 9, in some embodiments of the present invention, the pole 14 includes a column portion 141 and a flange portion 142, the flange portion 142 is connected to one end of the column portion 141, the other end of the column portion 141 passes through the pole hole 102 and is connected to the fixing member 17, a limit groove is formed between the flange portion 142 and the fixing member 17, and a part of the cover plate is embedded in the limit groove. Therefore, the pole 14 can be conveniently installed on the cover plate, and the stability of assembly between the base plate and the cover plate is effectively improved.

In addition, in combination with the above-mentioned embodiment, when the cover plate includes the laminated polished aluminum sheet 11 and the lower plastic 12, the polished aluminum sheet 11 and the lower plastic 12 can be connected together by the assembling manner of the post 14. Specifically, the cover plate includes an aluminum flake 11 and a lower plastic 12 which are stacked and fixedly connected, and an inner peripheral edge of the aluminum flake 11 and an inner peripheral edge of the lower plastic 12 are stacked and embedded between the flange portion 142 and the fixing member 17. Thereby, it is possible to improve the assembling efficiency of the cover body 10 and to improve the structural stability of the cover body 10.

In addition, the utility model discloses in, one side that deviates from lower plastic 12 on the aluminium sheet 11 is equipped with the breach groove around the utmost point post hole 102 on the surface, and at least a part of mounting 17 imbeds the breach groove.

In order to improve the sealing performance of the battery, a gasket 13 may be optionally disposed between the flange portion 142 and the cap plate, the gasket 13 surrounding the cylindrical portion 141.

Optionally, the cover plate is provided with a first positioning portion, the fixing member 17 is provided with a second positioning portion 111, and the first positioning portion and the second positioning portion 111 are embedded with each other. Through the cooperation of first location portion and second location portion 111, can be convenient for the stable cooperation of apron and mounting 17, realized apron and mounting 17 in ascending location of circumference, improved the assembly efficiency and the stability of battery effectively.

In some embodiments of the present invention, a positioning groove 143 is formed on the outer peripheral surface of the other end of the column portion 141, and the fixing member 17 is embedded in the positioning groove 143. Thereby effectively improving the fixing function of the fixing member 17 and effectively improving the stability of the battery.

The utility model provides a mounting 17 can be by the rubber coating shaping of moulding plastics. With the embodiment, the second positioning portion 111 can be formed by injection molding and encapsulation and can be embedded into the positioning groove 143, so that the forming method is simple, and the stability of the battery structure can be effectively improved.

Optionally, the boss 101 is raised above the post 14 on the inside of the cover plate. Therefore, the positioning effect of the lug boss 101 on the pole group is effectively improved, and the stability of the battery is further improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A battery, comprising:

the inner side surface of the cover body is provided with a positioning part;

the connecting piece, the connecting piece includes first section and second section, the first section of connecting piece with the second section links to each other, the first section of connecting piece with the lid by location portion location, just the first section of connecting piece with lid fixed connection.

2. The battery according to claim 1, wherein the positioning portion includes a stopper rib configured in a ring shape having an opening, and the first section of the connecting piece is embedded inside and positioned by the stopper rib.

3. The battery of claim 2, wherein the rib is configured in a shape in which a width dimension of at least a portion of the internal space is larger than a width dimension of the opening, the first section of the connecting tab is fitted into the internal space of the rib, and a width dimension at a junction of the first section and the second section is not larger than the width dimension of the opening.

4. The battery of claim 3, wherein the retaining rib is configured in a major arc shape, the first section of the tab is configured in a semi-circular shape, and a radial dimension of the first section of the tab is the same as an inner diameter of the retaining rib.

5. The battery of claim 3, wherein the second segment of the tab is shaped to have a width dimension that is no greater than a width dimension of the opening.

6. The battery of claim 2, wherein the positioning portion further comprises an annular rib, the annular rib protrudes in a direction perpendicular to the cover, the blocking rib is connected to a side of the annular rib away from the cover, and the blocking rib extends along the annular rib.

7. The battery of claim 6, wherein the cover comprises:

the cover plate is provided with a pole column hole, and the pole column hole penetrates through the cover plate along the thickness direction of the cover plate;

a pole post mounted on the cover plate and penetrating into the pole post hole,

the annular rib is arranged on the inner side face of the cover plate, one end of the pole is embedded in the annular rib, and the blocking rib is higher than the end face of the end of the pole.

8. The battery of claim 7, wherein a boss is disposed on an inner side surface of the cover plate, the bosses are disposed at two ends of the opening of the blocking rib, one surface of the boss is flush with an inner circumferential surface of the blocking rib, and the boss is higher than the blocking rib relative to the inner side surface of the cover plate.

9. The battery of claim 7, wherein the cover plate comprises a smooth aluminum sheet and a lower plastic which are stacked and fixedly connected, the lower plastic is provided with an explosion-proof hole which penetrates through the lower plastic along the thickness direction of the lower plastic, the smooth aluminum sheet is provided with a mounting hole which penetrates through the smooth aluminum sheet along the thickness direction of the smooth aluminum sheet, the smooth aluminum sheet is provided with an explosion-proof valve, the explosion-proof valve is mounted in the mounting hole and covers the explosion-proof hole, and an explosion-proof patch is attached to one side of the explosion-proof valve, which is far away from the explosion-proof hole.

10. The cell defined in claim 1, wherein the first segment surface of the tab is provided with a nickel plating layer.