CN217562757U - Spacing subassembly of utmost point ear, battery and battery package - Google Patents

Abstract

The utility model provides a lug limiting assembly, a battery and a battery pack, wherein the lug limiting assembly comprises a limiting part and a fixing part arranged on one side of the limiting part far away from a lug along the lug outlet direction; at least one end of the limiting part is connected with at least one end of the fixing part in a buckling mode through a shaft, and the other end of the limiting part is connected with the other end of the fixing part in a matched mode after rotating around the shaft, so that the tab bending part is limited between the limiting part and the fixing part. Compare in the spacing subassembly of present lock type with utmost point ear portion of bending inject wherein the back fix through the mode of direct lock, the utility model discloses a spacing subassembly detachability is strong, and the processing procedure is simple, can be convenient for realize the automation, and production efficiency is higher.

Description

Spacing subassembly of utmost point ear, battery and battery package

Technical Field

The utility model relates to a power battery assembles technical field, concretely relates to spacing subassembly of utmost point ear, battery and battery package.

Background

With the development of modern society and the enhancement of environmental protection consciousness of people, more and more devices select lithium batteries as power supplies, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, and a wide space is provided for the application and development of the lithium batteries. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries.

In present power battery structure, can set up a spacing subassembly between utmost point ear and apron to wherein with utmost point ear angle of bending restriction, play a guard action simultaneously. The conventional limiting assembly comprises two limiting parts, and after the bending angle of the tab is limited, the tab and the limiting part are fixed in a direct buckling mode. The limit component with the structure has the defects of complex disassembly and inconvenience in automation realization, particularly for a long battery cell structure, more parts are needed, the production efficiency is reduced, the defects in the manufacturing links are increased, and the safety performance of the battery is reduced.

In view of the above, it is necessary to provide a technical solution to the above problems.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model lies in: the utility model provides a spacing subassembly of utmost point ear to there is the dismantlement complicacy, is not convenient for realize automatic, the problem that leads to production efficiency to hang down in the spacing subassembly of solution present lock type.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a tab limiting assembly comprising:

a limiting member;

the fixing piece is arranged on one side of the limiting piece, which is far away from the pole lug, along the pole lug outlet direction;

at least one end of the limiting part is connected with at least one end of the fixing part in a buckling mode through a shaft, and the other end of the limiting part is connected with the other end of the fixing part in a matched mode after rotating around the shaft, so that the tab bending part is limited between the limiting part and the fixing part.

Preferably, at least one end of the limiting part is provided with a rotating shaft, at least one end of the fixing part is provided with a shaft hole, the rotating shaft at one end of the limiting part is assembled in the shaft hole at one end of the fixing part, and the other end of the limiting part is matched and connected with the other end of the fixing part after rotating around the rotating shaft, so that the tab bending part is limited between the limiting part and the fixing part.

Preferably, the rotation axis passes through the connecting rod to be connected the tip of locating part, the shaft hole is provided with the confession the first breach of rotation axis embedding and confession connecting rod pivoted second breach.

Preferably, the end of the rotating shaft is further provided with a rotating shaft buckle, and the end of the shaft hole is provided with a buckling surface matched with the rotating shaft buckle.

Preferably, the rotary shaft fastener is provided with a notch along a tab outlet direction, so that the rotary shaft fastener is divided into a first rotary shaft fastener and a second rotary shaft fastener.

Preferably, the limiting part includes a first limiting part and a second limiting part, at least one end of the first limiting part is provided with a first rotating shaft, at least one end of the second limiting part is provided with a second rotating shaft, the fixing part is provided with two shaft holes respectively assembled with the first rotating shaft and the second rotating shaft, the first limiting part is connected with the other end of the fixing part in a matched manner after rotating around the first rotating shaft, and the second limiting part is connected with the other end of the fixing part in a matched manner after rotating around the second rotating shaft.

Preferably, the two shaft holes are arranged at the same end of the fixing part, or are respectively arranged at two ends of the fixing part.

Preferably, the sum of the widths of the first limiting part and the second limiting part is smaller than the width of the fixing part, so as to cooperate to define a channel for a tab to pass through.

Preferably, at least one end of the fixing part is provided with a rotating shaft, at least one end of the limiting part is provided with a shaft hole, the rotating shaft at one end of the fixing part is assembled in the shaft hole at one end of the limiting part, and the other end of the fixing part is matched and connected with the other end of the limiting part after rotating around the rotating shaft, so that the tab bending part is limited between the limiting part and the fixing part.

Preferably, both ends of the limiting part are respectively connected with both ends of the fixing part through shaft buckling, so that after any one end is connected through shaft buckling, the other end is also connected through shaft buckling by rotating around a shaft.

Preferably, after the rotation around the shaft, the other end of the limiting part is fixed with the other end of the fixing part through buckling or bolt connection.

Preferably, the other end of the fixing piece is provided with a buckle shaft, and the other end of the limiting piece is provided with a buckle through hole matched with the buckle shaft; or the other end of the limiting part is provided with a buckle shaft, and the other end of the fixing part is provided with a buckle through hole matched with the buckle shaft.

Preferably, the fixing part is further provided with a mounting groove, the mounting groove is provided with a conductive block, and the conductive block is electrically connected with the bending part of the tab.

Preferably, the fixing piece is also provided with an air hole of an explosion-proof valve; the locating part is provided with a plurality of bleeder vent.

Preferably, one side of the fixing part, which is far away from the limiting part, is further provided with a plurality of anti-rotation pillars.

The utility model discloses a second of the purpose provides a battery, including above-mentioned arbitrary any spacing subassembly of utmost point ear.

The third object of the present invention is to provide a battery pack, including the above-mentioned battery.

The beneficial effects of the utility model reside in that: the utility model provides a spacing subassembly of utmost point ear, including locating part and mounting, the mode of axle lock is passed through to at least one end between them is connected to can make the other end between them connect around the pivoting, thereby prescribe a limit to the utmost point ear portion of bending the locating part with between the mounting, the spacing subassembly of this kind of structure is compared in present lock type spacing subassembly with utmost point ear portion of bending prescribe a limit to wherein the back fix through the mode of direct lock, the utility model discloses a spacing subassembly detachability is strong, and the processing procedure is simple, can be convenient for realize the automation, and production efficiency is higher.

Drawings

Fig. 1 is a schematic view of a part of the structure of the battery of the present invention.

Fig. 2 is a partial front view of the battery of the present invention.

Fig. 3 is a partial side view of the battery of the present invention.

Fig. 4 is the structure schematic diagram of the tab limiting assembly of the present invention.

Fig. 5 is the utility model discloses flow schematic diagram during spacing subassembly of utmost point ear when assembling.

Fig. 6 is a schematic structural diagram of the locating part of the present invention.

Fig. 7 is a second schematic structural diagram of the position limiting member of the present invention.

Fig. 8 is an enlarged view of a in fig. 6.

Fig. 9 is a schematic structural diagram of the fixing member of the present invention.

Fig. 10 is a second schematic structural view of the fixing member of the present invention.

Fig. 11 is a third schematic structural view of the fixing member of the present invention.

Fig. 12 is an enlarged view of B in fig. 10.

In the figure: 1-a shell; 2-a top cover assembly; 21-a top cover plate; 22-electrode terminals; 3-an electrode assembly; 31-a tab; 4-a lug limiting component; 5-a limiting part; 51-a first stop; 52-a second stop; 53-rotation axis; 54 connecting rods; 55-rotating shaft buckle; 56-notch; 57-snap through openings; 58-air holes; 6-a fixing piece; 61-axle hole; 62-a first notch; 63-a second notch; 64-a fastening surface; 65-snap shaft; 66-mounting grooves; 67-explosion-proof valve air hole; 68-electrode terminal through port; 69-anti-rotation posts; 7-liquid injection and air holes; 8-conductive blocks.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the present invention and its advantages will be described in further detail below with reference to specific embodiments and drawings of the specification, but the embodiments of the present invention are not limited thereto.

In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.

The utility model aims at providing a battery package, this battery package is formed by the combination of a plurality of battery cell.

As shown in fig. 1 to 3, the unit cell includes a case 1, a cap assembly 2, a tab restraining assembly 4, and an electrode assembly 3.

The electrode assembly 3 is accommodated in the casing 1 and includes a main body portion and a tab 31, the tab 31 extends from the main body portion along a longitudinal end and is electrically connected with the top cap assembly 2 after being bent, and the bent portion is limited in the tab limiting assembly 4. And the main part includes a naked electric core at least. The longitudinal direction is the Z direction.

The bare cell comprises a positive pole piece, a negative pole piece and a diaphragm which is arranged between the positive pole piece and the negative pole piece at intervals, and can be manufactured by winding or laminating. The positive pole piece is led out of the positive pole piece and is made of aluminum foil; and the negative pole tab led out from the negative pole piece can be made of copper foil or nickel-to-copper.

The top cap assembly 2 includes a top cap plate 21 and an electrode terminal 22 provided to the top cap plate 21, and the top cap plate 21 is coupled to the case 1 and covers an opening of the case 1, thereby enclosing the electrode assembly 3 within the case 1. The electrode terminals 22 are provided in at least two, one of which is for electrical connection with a positive electrode tab and the other of which is for electrical connection with a negative electrode tab.

In addition, the casing 1 or the top cover plate 21 is provided with an injection port and a pressure release port. The liquid injection port is used for injecting the electrolyte, and after the electrolyte is injected, the liquid injection port is closed, so that the secondary battery with good sealing performance is obtained.

And the tab limiting component 4 is arranged between the electrode component 3 and the top cover component 2, and after the tab 31 is bent, the bent part is limited in the tab limiting component 4 and is electrically connected with the electrode terminal 22.

As shown in fig. 4 to 5, the tab limiting assembly 4 includes a limiting member 5 and a fixing member 6 disposed on one side of the limiting member 5 away from the tab 31 along a tab outlet direction; at least one end of the limiting member 5 is in buckling connection with at least one end of the fixing member 6 through a shaft, and after the shaft rotates, the other end of the limiting member 5 is in fit connection with the other end of the fixing member 6, so that the bending portion of the tab 31 is limited between the limiting member 5 and the fixing member 6.

One of the specific embodiments is:

as shown in fig. 6 to 12, at least one end of the limiting member 5 is provided with a rotating shaft 53, at least one end of the fixing member 6 is provided with a shaft hole 61, the rotating shaft 53 at one end of the limiting member 5 is assembled in the shaft hole 61 at one end of the fixing member 6, and after rotating around the rotating shaft 53, the other end of the limiting member 5 is connected with the other end of the fixing member 6 in a matching manner, so that the bending portion of the tab 31 is defined between the limiting member 5 and the fixing member 6.

The rotation shaft 53 is connected to an end of the limiting member 5 through a connecting rod 54, and the shaft hole 61 is provided with a first notch 62 into which the rotation shaft 53 is inserted and a second notch 63 through which the connecting rod 54 rotates, as shown in an enlarged view of fig. 12. Preferably, the first notch 62 is in communication with the second notch 63 and is vertically disposed. The aperture of the first notch 62 is smaller than the diameter of the rotating shaft 53 and has certain elasticity, so that the rotating shaft 53 is not easy to be inserted, and the aperture of the second notch 63 is larger than or equal to the width of the connecting rod 54, so that the connecting rod 54 can rotate in the second notch 63.

The connecting rod 54 may extend from the end of the limiting member 5, and the extending end is used for connecting the rotating shaft 53. The connecting rod 54 may be a cylinder or a cube, and the rotating shaft 53 is preferably a cylinder. The connecting rod 54 is preferably located in the middle of the rotation shaft 53, and the second notch 63 is provided for the position of the connecting rod 54.

Preferably, a rotating shaft buckle 55 is further disposed at an end of the rotating shaft 53, and a fastening surface 64 engaged with the rotating shaft buckle 55 is disposed at an end of the shaft hole 61. Through the design of the rotating shaft buckle 55 and the buckling surface 64, after the rotating shaft 53 is embedded into the shaft hole 61, the rotating shaft buckle 55 is located at the position of the buckling surface 64 to play a limiting role. The rotating shaft buckle 55 is located at one end of the rotating shaft 53 away from the electrode assembly 3, and the buckling surface 64 is also located at one end of the shaft hole 61 away from the electrode assembly 3.

In addition, the rotary shaft buckle 55 is further provided with a notch 56 in the tab-out direction to divide the rotary shaft buckle 55 into a first rotary shaft buckle and a second rotary shaft buckle, see an enlarged view of fig. 8. Preferably this recess 56 extends through the rotation shaft 55 to said rotation shaft 53. The top of the fastening surface 64 of the shaft hole 61 is exposed, and then the notch 56 can be communicated with the outside, after the limiting member 5 and the fixing member 6 are assembled, the purpose of further fixing the rotating shaft 53 can be achieved through the parts matched with the notch 56, so as to ensure the stability of the limiting member 5 in the battery. Preferably, the notch 56 penetrates through the uppermost end of the connecting rod 54 connected to the rotating shaft 53, and the notch 56 is recessed from the axes of the rotating shaft 55 and the rotating shaft 53, so that the rotating shaft 55 is separated into two left and right shaft fasteners. By the arrangement of the material shortage of the middle notch 56, the extrusion of the rotating shaft 53 into the shaft hole 61 is facilitated, and the rotation of the rotating shaft 53 is smoother.

Preferably, the limiting member 5 includes a first limiting member 51 and a second limiting member 52, at least one end of the first limiting member 51 is provided with a first rotating shaft, at least one end of the second limiting member 52 is provided with a second rotating shaft, the fixing member 6 is provided with two shaft holes 61 respectively assembled with the first rotating shaft and the second rotating shaft, the first limiting member 51 is connected with the other end of the fixing member 6 after rotating around the first rotating shaft, and the second limiting member 52 is connected with the other end of the fixing member 6 after rotating around the second rotating shaft.

Specifically, one of the setting modes of the shaft hole 61 is as follows: the two shaft holes 61 may be disposed at the same end of the fixing member 6, that is, the two shaft holes 61 of the fixing member 6 are disposed at two sides of the end portion, and after being assembled with the first rotating shaft and the second rotating shaft, the two rotating shafts 53 rotate to the other end of the fixing member 6 around the shafts in opposite directions, respectively, so as to fixedly connect the other ends of the first limiting member and the second limiting member with the other end of the fixing member 6. The rotation angle can be 90-180 degrees based on the fixing piece 6.

The second setting mode of the shaft hole 61 is: two shaft holes 61 are respectively arranged at two ends of the fixing piece, namely, two shaft holes 61 of the fixing piece 6 are positioned at two ends, and after being respectively assembled with the first rotating shaft and the second rotating shaft, the two rotating shafts 53 respectively rotate to two ends of the fixing piece 6 around the shaft in the same direction, so that the other end of the first limiting piece and the other end of the second limiting piece are respectively fixedly connected with two ends of the fixing piece 6. The rotation angle can be 90-180 degrees based on the fixing piece 6.

Wherein, this first locating part 51's cross-sectional view wholly is "+", and the cross-sectional view of second locating part 52 wholly is "+", and the horizontal pole of first locating part 51 and the horizontal pole of second locating part 52 do not contact in the cross-sectional view, be promptly first locating part 51 with the width sum of second locating part 52 is less than the width of mounting 6 to the cooperation is injectd the passageway that supplies utmost point ear 31 to pass, can form after assembling with mounting 6 and inject utmost point ear 31 portion of bending in the holding tank wherein of bending, the utility model discloses a spacing subassembly 4 of utmost point ear can the centre gripping utmost point ear 31 not redundant, lets utmost point ear 31 bend naturally in the holding tank, prevents that utmost point ear 31 from scattering or tenesmus extrusion pole piece because of the vibration in the battery use, has improved the security performance of battery. The width refers to a length in the Y direction. And the width of the fixing member 6 may be specifically designed according to the width of the top cover plate 21.

In addition, along the direction X, the length of the first limiting member 51 may be the same as that of the fixing member 6, and the length of the second limiting member 52 may also be the same as that of the fixing member 6.

Preferably, the shape of the first limiting member 51 and the shape of the second limiting member 52 are arranged in a mirror image manner.

Correspondingly, the first rotating shaft is connected to the end of the first limiting member 51 through a first connecting rod, the second rotating shaft is connected to the end of the second limiting member 52 through a second connecting rod, and the two shaft holes 61 of the fixing member 6 are respectively provided with a first notch 62 for the rotating shaft 53 to be embedded in and a second notch 63 for the connecting rod 54 to rotate. The end parts of the first rotating shaft and the second rotating shaft are respectively provided with a rotating shaft buckle 55, the rotating shaft buckles 55 are also provided with notches 56 along the direction of the tab 31, and the notches 56 corresponding to the two rotating shaft buckles 55 respectively penetrate through the first rotating shaft and the second rotating shaft.

The second embodiment is: at least one end of the fixing part 6 is provided with a rotating shaft, at least one end of the limiting part 5 is provided with a shaft hole, the rotating shaft at one end of the fixing part 6 is assembled in the shaft hole at one end of the limiting part 5, and the other end of the fixing part 6 is matched and connected with the other end of the limiting part 5 after rotating around the rotating shaft, so that the bending part of the tab 31 is limited between the limiting part 5 and the fixing part 6.

In some embodiments, both ends of the limiting member 5 are respectively connected to both ends of the fixing member 6 by shaft fastening, so that after any one end is connected by shaft fastening, the other end is also connected by shaft fastening by rotating around the shaft, thereby limiting the bending portion of the tab 31 between the limiting member 5 and the fixing member 6. The arrangement of the rotating shaft 53 and the shaft hole 61 at either end can be referred to the above arrangement, and will not be described herein.

In some embodiments, after rotating around the shaft, the other end of the limiting member 5 and the other end of the fixing member 6 are fixed by a snap fit or a bolt connection. That is, the limiting member 5 is connected with one end of the fixing member 6 as a shaft snap, and the other end of the limiting member 5 and the other end of the fixing member 6 can be close to each other around the shaft, and the other end of the limiting member 5 and the other end of the fixing member 6 are fixed by snap-fit or bolt connection.

One of the specific embodiments of the snap-fit is as follows: the other end of mounting 6 is provided with buckle axle 65, the other end of locating part 5 is provided with buckle opening 57 with buckle axle 65 matches. A baffle plate extends from the other end of the limiting member 5, and a fastener through hole 57 is formed in the baffle plate. When the limiting member 5 comprises the first limiting member 51 and the second limiting member 52, a baffle plate extends from the end plate of the first limiting member 51 and the second limiting member 52, each baffle plate is provided with a fastening through hole 57, and correspondingly, two sides of the end portion of the other end of the fixing member 6 are provided with fastening shafts 65 respectively corresponding to the fastening through holes 57 of the two baffle plates. Because of buckle opening 57 sets up on locating part 5, compare in the mode of setting on mounting 6, this mode more is favorable to subsequent dismantlement, and it is more labour saving and time saving to block through the baffle.

The second embodiment of the snap-fit is: the other end of locating part 5 is provided with buckle axle 65, the other end of mounting 6 is provided with buckle through-opening 57 with buckle axle 65 matches. When the limiting member 5 includes the first limiting member 51 and the second limiting member 52, a baffle extends from the end plate of the first limiting member 51 and the second limiting member 52, each baffle is provided with a fastening shaft 65, correspondingly, two sides of the end portion of the other end of the fixing member 6 are provided with fastening through holes 57 corresponding to the fastening shafts 65 on the two baffles, respectively, the two fastening through holes 57 can be in a communicating state or a non-communicating state, and when the two fastening through holes 57 are in the communicating state, the situation that the two fastening shafts 65 contact and collide with each other due to the overlong length of the fastening shafts 65 should be avoided.

The concrete implementation mode of the bolt connection is as follows: the other end of locating part 5 and the other end of mounting 6 all are provided with the screw thread opening that corresponds, fix the other end of locating part 5 and the one end of mounting 6 through outside bolt.

In some embodiments, the fixing member 6 is further provided with a mounting groove 66, the mounting groove 66 is provided with a conductive block 8, and the conductive block 8 is electrically connected to the bent portion of the tab 31, as shown in fig. 10 to 11, where fig. 10 is a structural diagram of the tab without the conductive block, and fig. 11 is a structural diagram of the tab after the conductive block is mounted. In addition, an electrode terminal through hole 68 is reserved on one side of the fixing member 6 away from the conductive block 8 in the mounting groove 66, and the electrode terminal 22 on the top cover assembly 2 is electrically connected with the conductive block 8 through the electrode terminal through hole 68, so that the electrode terminal 22 is electrically connected with the tab 31. Preferably, the conductive block 8 is also provided with a conductive through hole at a position corresponding to the electrode terminal through hole 68, and the electrode terminal 22 is electrically connected to the tab 31 directly after passing through the electrode terminal through hole 68 and the conductive through hole. The conductive through-hole may have a smaller diameter than the electrode terminal through-hole 68 corresponding to the shape of the electrode terminal 22.

In some embodiments, the body structure of the fixing member 6 is made of an insulating material, and in addition to ensuring that the tab 31 is electrically connected to the electrode terminal 22, the body structure is in an insulating state elsewhere, so as to ensure the safety performance of the battery.

In some embodiments, the fixing member 6 is further provided with an explosion-proof valve vent 67; the limiting part 5 is provided with a plurality of air holes 58. Correspondingly, the top cover plate 21 is provided with a pressure relief opening corresponding to the vent 67 of the explosion-proof valve and a pressure relief cover corresponding to the pressure relief opening. In addition, a barrier net is embedded in the air hole 67 of the explosion-proof valve, so that the impact of gas can be buffered through the barrier net, and the safety performance of the battery is enhanced.

In some embodiments, the fixing member 6 is further provided with a liquid injection vent 7.

In some embodiments, the fixing member 6 is further provided with a plurality of anti-rotation posts 69 on a side thereof away from the limiting member 5. After the assembly of the limiting part 5 and the fixing part 6 is completed, the fixing is performed through the anti-rotation pillar 69, so that the stability of the tab limiting component 4 in the use process of the battery is ensured on one hand, and the tab 31 cannot be scattered or fall to extrude the pole piece due to the vibration of the battery in the use process on the other hand.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (17)

1. The utility model provides a spacing subassembly of utmost point ear which characterized in that includes:

a stopper;

the fixing piece is arranged on one side of the limiting piece, which is far away from the lug, along the lug outlet direction;

at least one end of the limiting part is in buckling connection with at least one end of the fixing part through a shaft, and the other end of the limiting part is matched and connected with the other end of the fixing part after rotating around the shaft, so that the tab bending part is limited between the limiting part and the fixing part.

2. The tab limiting assembly according to claim 1, wherein at least one end of the limiting member is provided with a rotating shaft, at least one end of the fixing member is provided with a shaft hole, the rotating shaft at one end of the limiting member is assembled in the shaft hole at one end of the fixing member, and after rotating around the rotating shaft, the other end of the limiting member is connected with the other end of the fixing member in a matching manner, so that the tab bending portion is limited between the limiting member and the fixing member.

3. The tab limiting assembly according to claim 2, wherein the rotating shaft is connected to the end of the limiting member through a connecting rod, and the shaft hole is provided with a first notch for the rotating shaft to be inserted into and a second notch for the connecting rod to rotate.

4. The tab limiting assembly according to claim 3, wherein a rotary shaft fastener is further disposed at an end of the rotary shaft, and a fastening surface engaged with the rotary shaft fastener is disposed at an end of the shaft hole.

5. The tab limiting assembly of claim 4 wherein the rotary shaft fastener is provided with a notch along a tab outlet direction to divide the rotary shaft fastener into a first rotary shaft fastener and a second rotary shaft fastener.

6. The tab limiting assembly according to any one of claims 2 to 5, wherein the limiting member includes a first limiting member and a second limiting member, at least one end of the first limiting member is provided with a first rotating shaft, at least one end of the second limiting member is provided with a second rotating shaft, the fixing member is provided with two shaft holes, which are respectively assembled with the first rotating shaft and the second rotating shaft, the first limiting member is connected with the other end of the fixing member after rotating around the first rotating shaft, and the second limiting member is connected with the other end of the fixing member after rotating around the second rotating shaft.

7. The lug limit assembly of claim 6, wherein the two shaft holes are disposed at the same end of the fixing member or disposed at two ends of the fixing member respectively.

8. The tab limiting assembly of claim 6 wherein the sum of the widths of the first and second limiting members is less than the width of the fixing member to cooperatively define a channel for a tab to pass through.

9. The tab limiting assembly according to claim 1, wherein at least one end of the fixing member is provided with a rotating shaft, at least one end of the limiting member is provided with a shaft hole, the rotating shaft at one end of the fixing member is assembled in the shaft hole at one end of the limiting member, and after rotating around the rotating shaft, the other end of the fixing member is connected with the other end of the limiting member in a matching manner, so that the tab bending portion is limited between the limiting member and the fixing member.

10. The tab limiting assembly according to claim 1, wherein both ends of the limiting member are respectively connected to both ends of the fixing member by shaft fasteners, so that after either end is connected by shaft fasteners, the other end is connected by shaft fasteners by rotating around a shaft.

11. The tab limiting assembly according to claim 1, wherein after rotating around the shaft, the other end of the limiting member is fixed to the other end of the fixing member by means of a snap fit or a bolt connection.

12. The tab limiting assembly according to claim 11, wherein the fixing member is provided at the other end thereof with a fastening shaft, and the limiting member is provided at the other end thereof with a fastening through hole matched with the fastening shaft; or the other end of the limiting part is provided with a buckle shaft, and the other end of the fixing part is provided with a buckle through hole matched with the buckle shaft.

13. The pole lug limiting assembly according to claim 1, wherein the fixing member is further provided with a mounting groove, a conductive block is mounted in the mounting groove, and the conductive block is electrically connected with the pole lug bending part.

14. The tab limiting assembly as claimed in claim 1, wherein the fixing member is further provided with vent holes of an explosion-proof valve; the locating part is provided with a plurality of bleeder vent.

15. The tab limiting assembly as claimed in claim 1, wherein a plurality of anti-rotation posts are further disposed on one side of the fixing member away from the limiting member.

16. A battery comprising the tab restraining assembly of any one of claims 1-15.

17. A battery pack comprising the battery of claim 16.

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