Battery cell, battery, and electric device

Abstract

A battery monomer, a battery and an electric device. The battery monomer comprises a housing component, a pole component and an electrode component, the housing component comprises a mounting wall; the pole component is mounted on the mounting wall, and the pole component comprises a pole body; the electrode component comprises an active material coating part, a conductive part and an insulating part, the conductive part is connected between the active material coating part and the pole body; at least part of the insulating part is arranged between the end part where the active material coating part and the conductive part are connected and the pole body, the insulating part is provided with a relief hole for the conductive part to pass through; the conductive part is bent to form an open slot, the insulating part extends into the open slot, and at least part of the slot wall of the conductive part for forming the open slot abuts against the insulating part. In the technical scheme of the embodiment of the application, the insulating part can press and support the bent part of the conductive part, the bending form of the conductive part is controllable, the risk of short circuit of the battery monomer is reduced, and the use reliability of the battery monomer is improved.

Description

Battery cell, battery and electric device TECHNICAL FIELD

[0001] The present application relates to the field of battery, in particular to a battery cell, a battery and an electric device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the related art, the tab of the battery cell may be short-circuited, affecting the reliability of the battery cell and hindering the further improvement of the reliability of the battery.

[0004] SUMMARY

[0005] In view of the above problems, the present application provides a battery cell, a battery and an electric device, which can reduce the risk of short circuit and improve the use reliability.

[0006] In a first aspect, the present application provides a battery cell, comprising a shell component, a pole component and an electrode component, the shell component defining a receiving cavity, and the shell component comprising a mounting wall; the pole component is mounted on the mounting wall, and the pole component comprises a pole body; the electrode component is received in the receiving cavity, and the electrode component comprises an active material coating part, a conductive part and an insulating part, the conductive part connecting between the active material coating part and the pole body; at least part of the insulating part is arranged between the end part of the active material coating part connected with the conductive part and the pole body, and the insulating part is provided with a relief hole for the conductive part to pass through; wherein the conductive part is bent to form an open slot, the insulating part extends into the open slot and abuts with at least part of the slot wall of the conductive part for forming the open slot.

[0007] In the technical scheme of the present application, by making the insulating part extend into the open slot and abut with at least part of the slot wall of the conductive part for forming the open slot, on the one hand, the insulating part can press and support the bent part of the conductive part, so that the conductive part can maintain a predetermined bending shape, and the bending shape of the conductive part is controllable, on the other hand, the insulating part can be blocked between the two oppositely arranged slot walls of the open slot, i.e. between the slot wall of the open slot away from the active material coating part and the active material coating part, reducing the probability of the conductive part inserting into the inside of the active material coating part and the slot wall of the open slot close to the active material coating part due to redundancy, thereby reducing the risk of short circuit of the battery cell and improving the use reliability of the battery cell.

[0008] In some embodiments, the avoiding hole comprises a first avoiding hole, and the insulating piece comprises: an insulating support arranged at one end of the active material coating portion close to the mounting wall and provided with the first avoiding hole, the insulating support at least partially extends into the opening slot and abuts at least part of the slot wall of the opening slot formed by the conductive portion. In the above technical solution, by arranging the insulating support at one end of the active material coating portion close to the mounting wall, the conductive portion can be shaped by the insulating support, so that the conductive portion can maintain a preset bending shape, and the insulating support can also block between the slot wall of the opening slot away from the active material coating portion and the active material coating portion, reducing the probability that the conductive portion is inserted into the inside of the active material coating portion and the slot wall of the opening slot close to the active material coating portion due to redundancy, thereby reducing the risk of short circuit of the battery monomer and improving the use reliability of the battery monomer.

[0009] In some embodiments, the insulating support comprises: a support body arranged at one end of the active material coating portion close to the mounting wall, the first avoiding hole is arranged in the support body, and the first avoiding hole has a first hole wall and a second hole wall arranged opposite in the width direction of the pole body; a first partition sheet arranged at the first hole wall and connected with the support body, the first partition sheet extends towards the center of the first avoiding hole and extends into the opening slot to abut at least part of the slot wall of the opening slot formed by the conductive portion. In the above technical solution, by arranging the insulating support to comprise the above support body and the first partition sheet, the bending part of the conductive portion can be pressed and supported by the first partition sheet, so that the conductive portion can maintain a preset bending shape, the bending shape of the conductive portion is controllable, and the first partition sheet can also block between the conductive portion and the active material coating portion, reducing the probability that the conductive portion is inserted into the inside of the active material coating portion due to redundancy, thereby reducing the risk of short circuit of the battery monomer and improving the use reliability of the battery monomer.

[0010] In some embodiments, the first partition sheet extends horizontally from the first hole wall to the second hole wall, or extends obliquely towards the active material coating portion.

[0011] In the technical solution, the plurality of tab pieces of the conductive part are adjacent to the root of the active material coating part and are close to each other to form a structure with a certain slope. By setting the first separation piece to the above structure, after the conductive part is inserted into place, the first separation piece and the conductive part are adjacent to the root of the active material coating part and are pressed against each other, so that the root of the conductive part adjacent to the active material coating part is more compact. Thus, the conductive part can maintain the preset gathering shape and cannot be dispersed, thereby further reducing the probability of the conductive part being inserted into the inside of the active material coating part. In addition, such a setting can reduce the occupation of the first separation piece in the internal space of the first avoiding hole away from the active material coating part, and reserve more space for the part of the conductive part away from the active material coating part, even for the pole part. This is beneficial to reduce the size of the conductive part in the thickness direction of the mounting wall after bending, thereby reducing the size of the battery monomer in the thickness direction of the mounting wall.

[0012] In some embodiments, the thickness of the first separation piece is less than the thickness of the bracket body, and the first separation piece is separated from the hole wall of the first avoiding hole on both sides of the length direction of the pole body, so that the first separation piece can be deformed under the pressure of the conductive part. In the above technical solution, by limiting the first separation piece to meet the above conditions, the first separation piece can be deformed under the action of external force (such as the pressure of the conductive part). Thus, the first separation piece can be shaped according to the root of the conductive part adjacent to the active material coating part, and can press the root of the conductive part adjacent to the active material coating part, so that the root of the conductive part adjacent to the active material coating part is more compact. Thus, the conductive part can maintain the preset gathering shape and cannot be dispersed.

[0013] In some embodiments, in the length direction of the pole body, the size of the first separation piece is greater than or equal to the size of the conductive part.

[0014] In the above technical solution, by controlling the size of the first separation piece in the length direction of the pole body to meet the above conditions, the first separation piece can be extended beyond the conductive part on both sides of the length direction of the pole body. Thus, the first separation piece can completely separate the part of the conductive part away from the active material coating part from the active material coating part, which can greatly reduce the probability of the conductive part being inserted into the inside of the active material coating part due to redundancy, further reduce the risk of short circuit of the battery monomer, and also reduce the local deformation problem caused by the first separation piece pressing the part of the conductive part in the length direction of the pole body. Thus, the risk of failure and damage of the conductive part is reduced, and the reliability and stability of the battery monomer are further improved.

[0015] In some embodiments, the conductive part includes an approaching section, a first extending section and a second extending section arranged in the extending direction of the conductive part, the approaching section is connected with the active material coating part, the second extending section is connected with the pole body, a first end of the first extending section is connected with the approaching section through a first bending part, and the other end of the first extending section is connected with the second extending section through a second bending part, so that the conductive part forms at least two open slots arranged in the thickness direction of the mounting wall and the openings of the two open slots face different directions; wherein the first partition piece at least partially extends into the open slot between the first extending section and the approaching section, and at least abuts against the first extending section. In the above technical solution, the first partition piece can separate the first extending section and the second extending section from the active material coating part, reduce the probability of the first extending section and the second extending section being inserted into the inside of the active material coating part and the approaching section due to redundancy, and further reduce the risk of short circuit of the battery monomer. The abutment of the first partition piece and the first extending section allows the first partition piece to support the first extending section, so that the conductive part can maintain the bending shape with at least two open slots.

[0016] In some embodiments, in the width direction of the pole body, the size of the overlapping area of the first partition piece and the first extending section is greater than half of the size of the first extending section and less than the size of the first extending section. In the above technical solution, by limiting the size of the overlapping area of the first partition piece and the first extending section to meet the above range, the first partition piece can effectively support the first extending section, and the reliability of the conductive part in the bending shape with at least two open slots is improved.

[0017] In some embodiments, the insulating support further includes a second partition piece arranged at the second hole wall and connected with the support body, the second partition piece extends towards the center of the first avoiding hole and is arranged in a spaced manner with the first partition piece, a through hole is formed between the two partition pieces and communicates with the first avoiding hole, the conductive part is arranged in the through hole, and the second partition piece abuts against the conductive part. In the above technical solution, by arranging the insulating support to include the first partition piece and the second partition piece, the first partition piece and the second partition piece can respectively abut against the opposite sides of the root of the conductive part adjacent to the active material coating part, and the root of the conductive part adjacent to the active material coating part is further made more compact, so that the conductive part can maintain the preset gathering shape and cannot be dispersed.

[0018] In some embodiments, the size of the through hole in the width direction of the pole body is greater than or equal to the thickness of the conductive part. By limiting the size of the through hole in the width direction of the pole body to meet the above condition, the conductive part can smoothly pass through the through hole, the abrasion of the conductive part by the first partition piece and the second partition piece is reduced, the risk of failure and damage of the conductive part is reduced, and the reliability and stability of the battery monomer are improved.

[0019] In some embodiments, the size of the second partition sheet in the length direction of the pole body is greater than or equal to the size of the conductive part. In the above technical solution, by controlling the size of the second partition sheet in the length direction of the pole body to meet the above condition, the second partition sheet can be extended beyond the two sides of the conductive part in the length direction of the pole body. This can reduce the local deformation problem caused by the second partition sheet pressing the conductive part in the length direction of the pole body, thereby reducing the risk of failure and damage of the conductive part, and further improving the reliability and stability of the battery cell.

[0020] In some embodiments, the conductive part includes a converging section, a first extension section and a second extension section arranged in the extension direction thereof, the converging section is connected with the active material coating part, the second extension section is connected with the pole body, the first end of the first extension section is connected with the converging section through a first bending part, and the other end of the first extension section is connected with the second extension section through a second bending part, so as to form at least two open slots arranged in the thickness direction of the mounting wall, and the openings of the two open slots are in different directions; wherein the second partition sheet extends towards the open slot between the first extension section and the second extension section, and at least abuts against the converging section. In the above technical solution, the second partition sheet extends towards the open slot between the first extension section and the second extension section, and the second extension section is separated from the converging section, which can reduce the risk of short circuit of the battery cell; the second partition sheet abuts against the converging section, so that the second partition sheet can constrain the shape of the converging section, thereby making the root part of the conductive part adjacent to the active material coating part more compact, and further making the conductive part maintain the preset converging shape and cannot be spread out.

[0021] In some embodiments, in the width direction of the pole body, the size of the overlapping area of the second partition sheet and the converging section is less than half of the size of the converging section. In the above technical solution, by limiting the size of the overlapping area of the second partition sheet and the converging section to meet the above range, the converging section and the first extension section of the conductive part can maintain the preset shape, so that the bending shape of the conductive part can be controlled.

[0022] In some embodiments, the avoiding hole includes a second avoiding hole, the insulating piece includes: an insulating film, the insulating film fully covers the active material coating part, the second avoiding hole is arranged at a position opposite to the mounting wall of the insulating film, and the size of the second avoiding hole is adapted to the thickness of the conductive part, the insulating film forms a circumferential wall of the second avoiding hole to block between the insulating support and the active material coating part, and the conductive part is sequentially arranged in the second avoiding hole, the first avoiding hole, and connected with the pole body. In the above technical solution, by adapting the size of the second avoiding hole to the thickness of the conductive part, on the one hand, the second avoiding hole allows the conductive part to pass through the insulating film, so that the conductive part can be electrically connected with the pole body of the pole part, on the other hand, in the state of passing through the second avoiding hole, the insulating film can also cover the position of the plurality of tabs of the conductive part adjacent to the root of the active material coating part, further insulating the active material coating part, reducing the risk of naked leakage of the active material coating part, and also insulating the plurality of tabs of the conductive part adjacent to the root of the active material coating part, so that the part of the conductive part passing through the second avoiding hole is separated from the active material coating part and the plurality of tabs of the conductive part adjacent to the root of the active material coating part, reducing the risk of short circuit of the battery monomer.

[0023] In some embodiments, the insulating film is connected with a retaining piece around at least part of the circumferential direction of the second avoiding hole, and the hardness of the retaining piece is greater than the hardness of the insulating film. In the above technical solution, by connecting the retaining piece on the insulating film, the rigidity of the insulating film can be increased, so that the plurality of tabs of the conductive part adjacent to the root of the active material coating part can be kept in a folded state, reducing the risk of short circuit of the battery monomer.

[0024] In some embodiments, the conductive part includes an approaching section, a first extending section and a second extending section arranged in the extending direction of the conductive part, the approaching section is connected with the active material coating part, the second extending section is connected with the pole body, and two ends of the first extending section are respectively connected with the approaching section and the second extending section; the first extending section is arranged in the avoiding hole, and the approaching section and the second extending section are respectively arranged on two sides of the insulating part. The insulating part can separate the approaching section and the second extending section, so as to reduce the probability that the second extending section is reversely inserted into the approaching section due to redundancy, and the insulating part can also separate the second extending section and the active material coating part, so as to reduce the probability that the second extending section is reversely inserted into the inside of the active material coating part due to redundancy, thereby reducing the risk of short circuit of the battery monomer and improving the reliability and stability of the battery monomer.

[0025] In some embodiments, the conductive part includes a plurality of tab pieces arranged in layers, and the plurality of tab pieces are close to each other near the root of the active material coating part to form a triangular approaching section; the plurality of tab pieces are close to each other at a position of the approaching section away from the active material coating part and connected to form the first extending section and the second extending section. In the above technical solution, the plurality of tab pieces are close to each other near the root of the active material coating part to form a triangular approaching section, so that the plurality of tab pieces can be arranged in layers and form an overall body which is not easy to loosen, thereby facilitating the connection of the conductive part and the pole body.

[0026] In some embodiments, the first end of the first extending section is connected with the approaching section through a first bending part, and a first open slot is defined among the first end, the approaching section and the first bending part; the second end of the first extending section is connected with the second extending section through a second bending part, and a second open slot is defined among the second end, the second extending section and the second bending part; the openings of the first open slot and the second open slot are in different directions and are arranged in the thickness direction of the mounting wall; and the insulating part at least partially extends into the first open slot to be located between the first extending section and the active material coating part. The insulating part can separate the side of the first extending section facing the active material coating part from the active material coating part, thereby reducing the probability that the first extending section of the conductive part is reversely inserted into the inside of the active material coating part or the approaching section due to redundancy, so as to reduce the risk of short circuit of the battery monomer and improve the use reliability of the battery monomer.

[0027] In some embodiments, the insulating part at least partially extends in the direction close to the second open slot to be located between the second extending section and the active material coating part. The insulating part can block between the second extending section and the side of the first extending section away from the active material coating part, or block between the second extending section and the side of the approaching section away from the active material coating part, so as to block between the second extending section and the active material coating part, thereby further reducing the probability that the conductive part is reversely inserted into the inside of the active material coating part, the first extending section or the approaching section due to redundancy, so as to reduce the risk of short circuit of the battery monomer and improve the use reliability of the battery monomer.

[0028] In some embodiments, the approaching section, the first extending section and the second extending section define a third opening groove, and the insulating piece at least partially extends into the third opening groove to block the second extending section from the active material coating portion. The insulating piece blocking the second extending section from the active material coating portion can reduce the probability of the second extending section being inserted into the inside of the active material coating portion and the approaching section due to redundancy, thereby reducing the risk of short circuit of the battery monomer and improving the use reliability of the battery monomer.

[0029] In some embodiments, the conductive part includes a tab, the tab includes a plurality of tab pieces stacked and arranged, and the approaching section, the first extending section and the second extending section are formed by different parts of the tab. The tab is directly connected with the pole body, the conductive piece can be omitted, and the connection step of the conductive piece and the tab is omitted, which is conducive to improving the production efficiency of the battery monomer.

[0030] In some embodiments, the conductive part includes a tab connected to one end of the active material coating portion close to the mounting wall, and the tab includes a plurality of tab pieces stacked and arranged; a conductive piece connected between the tab and the pole body, a part of the conductive piece forming the second extending section and another part of the conductive piece forming at least part of the first extending section, and at least part of the tab forming the approaching section. Indirectly connecting the tab and the pole body through the conductive piece can shorten the length of the tab, improve the problems such as wrinkling, bending and breaking of the tab pieces, and reduce the connection difficulty and improve the connection convenience of the conductive piece and the pole body by flexibly designing the shape and material of the conductive piece. In addition, the perforation operation of the tab, the connection operation of the tab and the pole part (which can also be omitted), and the connection operation of the pole part and the shell part, are not easy to cause the connection position of the active material coating portion and the conductive part to crack, thereby improving the reliability of the battery monomer.

[0031] In some embodiments, the conductive piece includes a transition piece, and the transition piece includes a plurality of transition foil pieces stacked and connected to be deformable. Since the plurality of transition foil pieces have small thickness, the plurality of transition foil pieces are equivalent to multiple layers of thin plates, and the transition piece formed by the plurality of transition foil pieces is more easily bent than an integrally formed transition piece, so that the transition piece and the tab can be bent as needed, so that the conductive part forms a pre-bent shape, thereby meeting the design needs.

[0032] In some embodiments, the pole part further includes a transition structure surrounding the pole body and connected with the mounting wall, and an insulating structure insulatingly and sealingly fitted between the transition structure and the pole body. In the above technical solution, the pole part has a simple structure and is easy to process, and since it includes the pole body and the transition structure, the shape and size of the pole body and the shape and size of the transition structure can be designed separately based on different factors to flexibly adapt to the connection needs of different forms of shell parts and electrode parts, thereby increasing the application range of the pole part.

[0033] In some embodiments, the adapter structure is formed in a long strip shape extending along the length direction of the mounting wall, and the profile shape of the pole body matches the profile shape of the adapter structure; or the adapter structure is formed in a long strip shape extending along the length direction of the mounting wall, and the pole body is arranged at the length center position of the adapter structure and is circular. In the above technical solutions, when the profile shape of the pole body is formed in a long strip shape matching the profile shape of the adapter structure, the area of the pole body is larger, which is beneficial to improve the connection area of the conductive part and the pole body, thereby improving the conductive performance. When the pole body is arranged at the length center position of the long strip-shaped adapter structure and is circular, it is beneficial to reduce the connection area of the pole body and the adapter structure, improve the stress uniformity at the connection position of the pole body and the adapter structure, and thereby improve the connection reliability of the pole body and the adapter structure.

[0034] In some embodiments, the insulating structure includes a sealing structure member, which is annularly arranged at the circumferential side of the adapter structure facing the pole body and is clamped between the adapter structure and the pole body in the inner-outer direction of the mounting wall. In the above technical solutions, by arranging the sealing structure member to be clamped between the adapter structure and the pole body in the inner-outer direction of the mounting wall, axial sealing between the adapter structure and the pole body is achieved. The axial sealing can achieve a more reliable sealing effect, improve the leakage problem at the matching position of the adapter structure and the pole body, and the embodiments of the present application can reduce the axial force on the mounting wall by integrating the axial sealing in the pole part. Moreover, by annularly arranging the sealing structure member at the inner ring of the adapter structure, the sealing structure member can approach the matching position of the adapter structure and the pole body, which is beneficial to seal the matching position of the adapter structure and the pole body in a shorter path, improve the reliability of the sealing, and is also beneficial to reduce the size of the sealing structure member, reduce the sealing area, easily realize compression sealing, and improve the sealing effect.

[0035] In some embodiments, the mounting wall has a mounting hole, the pole part cover is arranged at the mounting hole, and the edge of the adapter structure is overlapped on one side of the wall thickness direction of the mounting wall. In the above technical solutions, the assembly of the adapter structure and the mounting wall is facilitated, and the production efficiency is improved. When the edge of the adapter structure is overlapped on the side of the mounting wall away from the electrode part, the assembly and connection of the pole part and the mounting wall are facilitated, and the connection reliability of the pole part and the mounting wall is improved. When the edge of the adapter structure is overlapped on the side of the mounting wall facing the electrode part, the electrode part and the pole part can be assembled together, and the pole part does not need to pass through the mounting hole, thereby reducing the operation steps and the operation difficulty.

[0036] In some embodiments, the edge of the adapter structure overlaps the side of the mounting wall facing away from the electrode component, the mounting wall has a first recess arranged around the mounting hole, the first recess is open towards the direction away from the electrode component, and the edge of the adapter structure has a flange part embedded in the first recess. In the above technical solution, the connection between the adapter structure and the mounting wall is conveniently supported and positioned, and the two are conveniently welded from the outside of the mounting wall.

[0037] In some embodiments, the edge of the adapter structure overlaps the side of the mounting wall facing away from the electrode component, the mounting hole is an elongated hole, and the pole component is formed as an elongated structure matching the shape of the mounting hole. In the above technical solution, the space required for the overturning movement of the pole component is small, the space required for the overturning of the pole component is reduced, the length of the conductive part is conveniently shortened, material is saved, cost is reduced, the redundancy of the conductive part is reduced, the space occupation of the conductive part in the accommodation cavity is reduced, and the energy density of the battery monomer is conveniently improved.

[0038] In some embodiments, the edge of the adapter structure overlaps the side of the mounting wall facing away from the electrode component, the mounting hole is an elongated hole, and the pole component is formed as an elongated structure matching the shape of the mounting hole. In the above technical solution, the space required for the overturning movement of the pole component is small, the space required for the overturning of the pole component is reduced, the length of the conductive part is conveniently shortened, material is saved, cost is reduced, the redundancy of the conductive part is reduced, the space occupation of the conductive part in the accommodation cavity is reduced, and the energy density of the battery monomer is conveniently improved.

[0039] In some embodiments, the pole component surrounds a first accommodation groove recessed towards the direction away from the electrode component and open towards the direction of the electrode component relative to the mounting wall, the electrode component is connected with the pole component through the conductive part, and at least part of the conductive part is accommodated in the first accommodation groove and connected with the pole body. In the above technical solution, the first accommodation groove is arranged to accommodate the conductive part, so that the space occupation of the conductive part in the accommodation cavity is reduced, the accommodation cavity has a larger space to accommodate the active material coating part, the volume of the active material coating part is conveniently increased, and the energy density of the battery monomer is increased. Moreover, since the first accommodation groove is open towards the direction of the electrode component, the conductive part can easily extend into the first accommodation groove, and the operation difficulty is reduced.

[0040] In some embodiments, the pole body is formed with a second accommodating groove, the second accommodating groove is open in a direction away from the accommodating cavity, and a bottom wall of the second accommodating groove is provided with a through hole, the conductive part is arranged in the through hole and at least partially accommodated in the second accommodating groove. In the above technical solution, on the one hand, the pole body is provided with the second accommodating groove, which can reduce the weight of the pole body to some extent, so as to improve the weight energy density of the battery monomer and the battery. On the other hand, since the groove opening of the second accommodating groove is formed on the outer end surface of the pole body, and the outer end surface of the pole body is the surface of the pole body away from the active material coating part, the second accommodating groove can be open in a direction away from the active material coating part. Therefore, when at least part of the conductive part is accommodated in the second accommodating groove, the conductive part can be easily arranged through the groove opening of the second accommodating groove, and the electrical connection between the conductive part and the pole body can be easily operated through the groove opening of the second accommodating groove, and the production difficulty of the battery monomer can be reduced and the production efficiency of the battery monomer can be improved.

[0041] In some embodiments, the shell part includes a shell body with an opening and a shell cover covering the opening; the mounting wall includes a wall body arranged opposite to the opening of the shell body, and / or the mounting wall includes the shell cover. In the above technical solution, the pole part can be flexibly arranged.

[0042] In the second aspect, the application provides a battery including the battery monomer in the above embodiments.

[0043] In the technical solution of the embodiments of the application, by using the above battery monomer, the risk of short circuit of the battery monomer can be reduced, the use reliability of the battery monomer is improved, and the use reliability of the battery is improved.

[0044] In some embodiments, the battery includes a box body, the battery monomers are multiple and accommodated in the box body, a bottom of the box body is a box bottom plate, and the pole part is arranged on a side of the shell part facing the box bottom plate or a side of the shell part away from the box bottom plate. In the above technical solution, when the pole part of the battery monomer is arranged on the side of the shell part facing the box bottom plate, the battery monomer is in an inverted state, and the product of pressure relief is sprayed in a direction away from the passenger cabin, which is safer. When the pole part of the battery monomer is arranged on the side of the shell part close to the box bottom plate, the battery monomer is in a normal state, and the electrolyte is not easy to leak. Therefore, the battery monomer and the box body can be flexibly arranged.

[0045] In the third aspect, the application provides a power utilization device including the battery in the above embodiments; or including the battery in the above embodiments.

[0046] In the technical solution of the embodiments of the application, by using the above battery monomer or battery, the use reliability of the power utilization device can be improved.

[0047] The above description is merely a general description of the technical solutions of the present application. In order to enable one of ordinary skill in the art to better implement the present application, the technical solutions of the present application can be implemented according to the contents of the specification, and in order to enable the above and other purposes, features and advantages of the present application to be more apparent and understandable, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0048] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to narrow the scope of the present application in any way. Instead, they are included to provide illustration of the preferred embodiments of the present application. In the drawings:

[0049] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0050] FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

[0051] FIG. 3 is a structural schematic diagram of a battery cell according to some embodiments of the present application;

[0052] FIG. 4 is a structural sectional view of a battery cell according to some embodiments of the present application;

[0053] FIG. 5 is a partial enlarged view of the battery cell shown in FIG. 4;

[0054] FIG. 6 is a structural schematic diagram of an insulating support of a battery cell according to some embodiments of the present application;

[0055] FIG. 7 is an assembly view of an insulating support and an electrode member of a battery cell according to some embodiments of the present application;

[0056] FIG. 8 is another assembly view of an insulating support and an electrode member of a battery cell according to some embodiments of the present application;

[0057] FIG. 9 is a structural schematic diagram of an insulating support of a battery cell according to some embodiments of the present application;

[0058] FIG. 10 is a structural sectional view of the insulating support of the battery cell shown in FIG. 9;

[0059] FIG. 11 is an assembly view of an insulating support and an electrode member of a battery cell according to some embodiments of the present application;

[0060] FIG. 12 is another assembly view of an insulating support and an electrode member of a battery cell according to some embodiments of the present application;

[0061] FIG. 13 is an assembly view of an insulating support and a housing member of a battery cell according to some embodiments of the present application;

[0062] FIG. 14 is a schematic view of a structure of an electrode member of a battery cell according to some embodiments of the present application, in which the electrode member is fitted into a case member and an insulating support is not deformed;

[0063] FIG. 15 is a schematic view of a structure of an electrode member of a battery cell according to some embodiments of the present application, in which the electrode member is fitted into a case member and an insulating support is deformed;

[0064] FIG. 16 is a schematic view of a structure of an electrode member of a battery cell according to some embodiments of the present application, in which a conductive portion of the electrode member is connected to a post member;

[0065] FIG. 17 is a schematic view of a structure of an electrode member of a battery cell according to some embodiments of the present application, in which a post member is connected to a case member;

[0066] FIG. 18 is a schematic view of a structure of an electrode member and an insulating film of a battery cell according to some embodiments of the present application;

[0067] FIG. 19 is a schematic view of a structure of an electrode member and an insulating film of a battery cell according to some embodiments of the present application;

[0068] FIG. 20 is a schematic view of a structure of an insulating film of a battery cell according to some embodiments of the present application;

[0069] FIG. 21 is a schematic view of a structure of an electrode member and an insulating film of a battery cell according to some embodiments of the present application;

[0070] FIG. 22 is a plan view of the structure shown in FIG. 21;

[0071] FIG. 23 is a cross-sectional view of the structure of the electrode member and the insulating film shown in FIG. 21;

[0072] FIG. 24 is a schematic view of a structure of an electrode member and an insulating film of a battery cell according to some embodiments of the present application;

[0073] FIG. 25 is a plan view of the structure shown in FIG. 24;

[0074] FIG. 26 is a cross-sectional view of the structure of the electrode member and the insulating film shown in FIG. 24;

[0075] FIG. 27 is a schematic view of a structure of a conductive portion of a battery cell according to some embodiments of the present application, in which the conductive portion is in a straightened state;

[0076] FIG. 28 is a schematic view of a structure of a conductive portion of a battery cell according to some embodiments of the present application, in which the conductive portion is connected to a post member;

[0077] FIG. 29 is a schematic view of a structure of a post member of a battery cell according to some embodiments of the present application, in which the post member is connected to a case member;

[0078] FIG. 30 is a cross-sectional view of a structure of a battery cell according to some embodiments of the present application;

[0079] FIG. 31 is a partial enlarged view of the battery cell shown in FIG. 30;

[0080] FIG. 32 is a partial structural schematic view of the conductive portion of the battery cell shown in FIG. 30 when being shaped;

[0081] FIG. 33 is a structural exploded view of the conductive portion of the battery cell shown in FIG. 30;

[0082] FIG. 34 is a partial structural schematic view of the conductive portion of the battery cell shown in FIG. 30 in a straightened state;

[0083] FIG. 35 is a structural schematic view of the electrode member of the battery cell shown in FIG. 30 fitted into the housing member;

[0084] FIG. 36 is a partial structural schematic view of the conductive portion of the battery cell shown in FIG. 30 connected to the pole member;

[0085] FIG. 37 is a partial structural schematic view of the pole member of the battery cell shown in FIG. 30 connected to the housing member;

[0086] FIG. 38 is a structural schematic view of a battery cell according to another embodiment of the present application;

[0087] FIG. 39 is a schematic view of a pole member according to some embodiments of the present application;

[0088] FIG. 40 is a plan view of the pole member shown in FIG. 39;

[0089] FIG. 41 is a view in the direction of B shown in FIG. 40;

[0090] FIG. 42 is a sectional view along the line C-C shown in FIG. 40;

[0091] FIG. 43 is a partial sectional view of a battery cell according to some embodiments of the present application;

[0092] FIG. 44 is a partial sectional view of a battery cell according to some embodiments of the present application;

[0093] FIG. 45 is a partial sectional view of a battery cell according to some embodiments of the present application;

[0094] FIG. 46 is a sectional view of a battery cell according to some embodiments of the present application;

[0095] FIG. 47 is a sectional view of a battery cell according to some embodiments of the present application;

[0096] FIG. 48 is a sectional view of a battery cell according to some embodiments of the present application;

[0097] FIG. 49 is a partial sectional view of a battery cell according to some embodiments of the present application, in which the pole member is in a state in which the cover is positioned before the mounting wall;

[0098] Figure 50 is a diagram showing the pole post component shown in Figure 49 after it has been installed on the mounting wall.

[0099] Figure 51 is an exploded view of a portion of the battery cell provided in some embodiments of this application;

[0100] Figure 52 is a partial cross-sectional view of a battery cell provided in some embodiments of this application, in which the terminal component is in a state before being covered by the mounting wall;

[0101] Figure 53 shows the state of the pole post component shown in Figure 52 after it is covered by the mounting wall;

[0102] Figure 54 is a structural cross-sectional view of a battery cell according to some other embodiments of this application;

[0103] Figure 55 is a partial enlarged view of the battery cell shown in Figure 54;

[0104] Figure 56 is a structural cross-sectional view of a battery cell according to some other embodiments of this application;

[0105] Figure 57 is a partial enlarged view of the battery cell shown in Figure 56;

[0106] Figure 58 is a structural cross-sectional view of a battery cell according to some embodiments of this application;

[0107] Figure 59 is a partial enlarged view of the battery cell shown in Figure 58;

[0108] Figure 60 is a schematic diagram of the structure of a battery cell according to some other embodiments of this application;

[0109] Figure 61 is an exploded view of the structure of the battery cell shown in Figure 60;

[0110] Figure 62 is a cross-sectional view of the battery cell shown in Figure 60;

[0111] Figure 63 is a partial enlarged view of the battery cell shown in Figure 62;

[0112] Figure 64 is an exploded view of the processing of a battery cell according to an embodiment of this application;

[0113] Figure 65 is an exploded view of the processing of a battery cell according to an embodiment of this application;

[0114] Figure 66 is an exploded view of the processing of a battery cell according to an embodiment of this application;

[0115] Figure 67 is an exploded view of the processing of a battery cell according to an embodiment of this application;

[0116] Figure 68 is an exploded view of the processing of a battery cell according to an embodiment of this application.

[0117] The specific embodiment in the drawing label is as follows: vehicle 1000; battery 100; controller 200; motor 300; box body 101; first box part 1011; second box part 1012; box body bottom plate 1013; battery monomer 102; first direction F1; second direction F2; third direction F3; fourth direction F4; fifth direction F5; shell part 1; shell body 11; mounting wall 111; first sink groove 1111; lap joint part 1112; mounting hole 112; opening 113; peripheral wall 114; shell cover 12; containing cavity 13; sealing ring 14; supporting plate 15; pole column part 2; first containing groove 201; second containing groove 202; pole column body 21; through hole 210; inner end face 211; peripheral edge part 212; outer end face 213; penetrating part 214; riveting part 2141; inner limiting part 215; outer limiting part 216; first pole column piece 21a; second pole column piece 21b; matching hole 21b1; adapter structure 22; inner end face of adapter structure 220; surrounding area 2201; flange part 22a; second sink groove 22b; first adapter ring 221; second adapter ring 222; stop ring part 2221; third adapter ring 223; inner extension part 2231; outer extension part 2232; first insulation frame 224; second insulation frame 225; fourth adapter ring 227; matching ring part 2271; third insulation frame 228; insulation structure 23; sealing joint structure 231; shaft side part 231a; first insulation piece 232; second insulation piece 234; electrode part 3; electrode assembly 31; pole lug piece 311; folding part 313; active substance coating part 32; conductive part 33; close-together section 331; first extension section 332; first bending part 3320; second extension section 333; second bending part 3330; first connecting part 3331; second connecting part 3332; third connecting part 3333; opening groove 334; first opening groove 3341; second opening groove 3342; third opening groove 3343; pole lug 335; pole lug end part 3351; conductive piece 336; clamping part 3360; insertion groove 3361; first connecting section 3362; second connecting section 3363; first conductive section 3365; second conductive section 3366; third conductive section 3367; pressure relief device 6; insulation film 7; second avoiding hole 701; tearing structure 702; first tearing part 7021; second tearing part 7022; breaking structure 703; main body insulation part 71; main body part 711; first insulation part 72; second insulation part 73; retaining piece 8; insulation support 9; first avoiding hole 901; first hole wall 9011; second hole wall 9012; perforation 902; support body 91; first separation piece 92; second separation piece 93. Specific embodiment

[0118] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0119] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "coupled" as used herein means the joining of two members together with one or more intervening members.

[0120] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0121] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0122] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0123] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0124] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical 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 are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0125] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0126] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0127] In the related art, the tab of the battery monomer can be short-circuited, which affects the reliability of the battery monomer and hinders the further improvement of the reliability of the battery.

[0128] In order to improve the reliability of the battery monomer, the insulating piece of the present application extends into the opening slot formed by the bending of the conductive part, and abuts with at least part of the slot wall of the opening slot formed by the conductive part. The conductive part can maintain the preset bending shape, the bending shape of the conductive part is controllable, the probability of the conductive part inserting into the inside of the active material coating part due to redundancy and the slot wall close to the active material coating part of the opening slot is reduced, thereby the risk of short circuit of the battery monomer can be reduced, and the use reliability of the battery monomer is improved.

[0129] The battery cell disclosed by the embodiments of the present application can be used in a power consumption device using a battery as a power source or a variety of energy storage systems using a battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric aircraft toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0130] The following embodiments are described for convenience with a power consumption device of an embodiment of the present application as an example of a vehicle 1000.

[0131] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0132] In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0133] Please refer to FIG. 2, which is an exploded view of the battery 100 according to some embodiments of the present application. The battery 100 includes a box 101 and a battery cell 102, which is accommodated in the box 101. The box 101 is used to provide a space for accommodating the battery cell 102, and the box 101 can have various structures. In some embodiments, the box 101 can include a first box part 1011 and a second box part 1012, which are overlapped with each other, and together define a space for accommodating the battery cell 102. The second box part 1012 can be a hollow structure with one end open, and the first box part 1011 can be a plate structure, which is overlapped with the open end of the second box part 1012 to define the space together with the second box part 1012. Alternatively, the first box part 1011 and the second box part 1012 can both be hollow structures with one side open, and the open side of the first box part 1011 is overlapped with the open side of the second box part 1012. Of course, the box 101 formed by the first box part 1011 and the second box part 1012 can have various shapes, such as a cylinder, a cuboid, etc.

[0134] In the battery 100, the battery cell 102 can be multiple, and the multiple battery cells 102 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 102 are connected in series and in parallel. The multiple battery cells 102 can be directly connected in series, in parallel, or in a mixed manner, and then the whole of the multiple battery cells 102 is accommodated in the box 101. Of course, the battery 100 can also be that the multiple battery cells 102 are first connected in series, in parallel, or in a mixed manner to form a battery 100 module, and then the multiple battery 100 modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box 101. The battery 100 can also include other structures, for example, the battery 100 can also include a current combing component for realizing the electrical connection between the multiple battery cells 102.

[0135] Each battery cell 102 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, a magnesium-ion battery, or a solid-state battery, but is not limited thereto. The battery cell 102 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc.

[0136] Please refer to FIG. 3 and FIG. 4, which are structural schematic diagrams of the battery cell 102 according to some embodiments of the present application. FIG. 3 is a structural schematic diagram of the battery cell 102, and FIG. 4 is a structural sectional view of the battery cell 102. The battery cell 102 refers to the smallest unit that constitutes the battery 100. As shown in FIG. 3 and FIG. 4, the battery cell 102 includes a shell part 1, a pole part 2, an electrode part 3, an electrolyte, and other functional parts. The shell part 1 includes a shell cover 12 and a shell body 11.

[0137] The shell cover 12 refers to a component that covers the opening 113 of the shell body 11 to isolate the internal environment of the battery cell 102 from the external environment. Without limitation, the shape of the shell cover 12 can be adapted to the shape of the shell body 11 to fit the shell body 11. Optionally, the shell cover 12 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the shell cover 12 is not easily deformed when subjected to extrusion collision, so that the battery cell 102 can have higher structural strength, and the reliability can also be improved. The shell cover 12 can be provided with functional components such as the pole component 2. The pole component 2 can be used to electrically connect with the electrode component 3 for outputting or inputting the electric energy of the battery cell 102. In some embodiments, the shell cover 12 can also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 102 reaches a threshold value. The material of the shell cover 12 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations. In some embodiments, an insulating piece can also be provided on the inner side of the shell cover 12, which can be used to isolate the electrical connection components in the shell body 11 from the shell cover 12 to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, etc.

[0138] The shell body 11 is a component used to fit the shell cover 12 to form the internal environment of the battery cell 102, wherein the formed internal environment can be used to accommodate the electrode component 3, the electrolyte and other components. The shell body 11 and the shell cover 12 can be independent components, and the opening 113 can be provided on the shell body 11, and the shell cover 12 is covered on the opening 113 to form the internal environment of the battery cell 102. Without limitation, the shell cover 12 and the shell body 11 can also be integrated, specifically, the shell cover 12 and the shell body 11 can form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell body 11, the shell cover 12 is covered on the shell body 11. The shell body 11 can be various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the shell body 11 can be determined according to the specific shape and size of the electrode component 3. The material of the shell body 11 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations.

[0139] The electrode member 3 includes an electrode assembly 31, which is a member in which an electrochemical reaction occurs in the battery cell 102. One or more electrode assemblies 31 can be contained within the casing body 11. The electrode assembly 31 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active material that constitute a main body of the electrode assembly 31, and portions without active material that each constitute a tab 335. The positive electrode tab 335 and the negative electrode tab 335 can be collectively located at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery 100, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs 335 are connected to the post member 2 to form a current loop. In a solid-state battery, the electrolyte can be a solid electrolyte layer located between the positive and negative electrode sheets, and the separator described above can be omitted.

[0140] According to some embodiments of the present application, referring to FIG. 4, and further referring to FIG. 5, which is a partial enlarged view of the battery cell 102 shown in FIG. 4, the casing member 1 defines a receiving cavity 13, and the casing member 1 includes a mounting wall 111, on which the post member 2 is mounted, and the post member 2 includes a post body 21.

[0141] The mounting wall 111 is a partial shell wall of the casing of the casing member 1, which can serve as a mounting carrier for the post member 2. The mounting wall 111 can be a partial shell wall of the casing body 11 of the casing, or a partial shell wall of the casing cover 12 of the casing, or can include a partial shell wall of the casing body 11 and a partial shell wall of the casing cover 12.

[0142] Referring again to FIGS. 4 and 5, the battery cell 102 further includes an electrode member 3, which is received in the receiving cavity 13. The electrode member 3 includes an active material coated portion 32, a conductive portion 33, and an insulating member. The conductive portion 33 connects between the active material coated portion 32 and the post body 21 for outputting or inputting electrical energy of the battery cell 102.

[0143] At least a portion of the insulating member is disposed between the active material coated portion 32 and the end portion at which the conductive portion 33 is connected, and the post body 21, i.e., at least a portion of the insulating member is disposed between the active material coated portion 32 and the mounting wall 111. The insulating member is provided with a relief hole, which can be provided for the conductive portion 33 to pass through, so that the conductive portion 33 can pass through the insulating member to electrically connect with the post body 21 of the post member 2.

[0144] As shown in FIGS. 3 and 4, the height direction of the active material coated portion 32 is a first direction F1, the thickness direction of the active material coated portion 32 is a second direction F2, and the width direction of the active material coated portion 32 is a third direction F3. The active material coated portion 32 has a first end and a second end oppositely arranged in the height direction thereof.

[0145] If the conductive part 33 is arranged at the first end of the active material coated part 32, the wall of the housing part 1 opposite to the first end of the active material coated part 32 is the mounting wall 111, and the insulating part is arranged at least partially between the first end of the active material coated part 32 and the pole body 21; if the conductive part 33 is arranged at the second end of the active material coated part 32, the wall of the housing part 1 opposite to the second end of the active material coated part 32 is the mounting wall 111, and the insulating part is arranged at least partially between the second end of the active material coated part 32 and the pole body 21; if the conductive part 33 is arranged at the first end and the second end of the active material coated part 32, the walls of the housing part 1 opposite to the first end and the second end of the active material coated part 32 are both the mounting wall 111, and the insulating part is arranged at least partially between the first end of the active material coated part 32 and one of the pole bodies 21, and at least partially between the second end of the active material coated part 32 and the other pole body 21.

[0146] The insulating part can be used to isolate the active material coated part 32 from the mounting wall 111 of the housing part 1, and reduce the probability of the active material coated part 32 contacting the mounting wall 111 of the housing part 1, so as to reduce the risk of the active material coated part 32 corroding the mounting wall 111 of the housing part 1 due to being exposed, reduce the risk of the active material coated part 32 failing itself, and reduce the risk of liquid leakage, thereby improving the reliability and stability of the battery monomer 102.

[0147] As shown in FIG. 5, the conductive part 33 is bent to form an open slot 334, the insulating part extends into the open slot 334, and the insulating part abuts against at least part of the slot wall of the conductive part 33 used to form the open slot 334.

[0148] For example, the insulating part can abut against the slot wall of the open slot 334 close to the active material coated part 32, so as to prevent the slot wall of the open slot 334 close to the active material coated part 32 from deforming in a direction away from the active material coated part 32; for another example, the insulating part can abut against the slot wall of the open slot 334 away from the active material coated part 32, so as to prevent the slot wall of the open slot 334 away from the active material coated part 32 from deforming in a direction close to the active material coated part 32, i.e., the insulating part can press and support the bent part of the conductive part 33, so that the conductive part 33 can maintain a preset bent shape, i.e., the bent shape of the conductive part 33 is controllable.

[0149] In the technical solution of the embodiment of the application, the insulating part extends into the opening groove 334 and abuts against at least part of the groove wall of the opening groove 334 formed by the conductive part 33. On the one hand, the insulating part can press and support the bent part of the conductive part 33, so that the conductive part 33 can maintain a preset bent shape, that is, the bent shape of the conductive part 33 is controllable. On the other hand, the insulating part can be blocked between the two oppositely arranged groove walls of the opening groove 334, that is, it can be blocked between the groove wall of the opening groove 334 away from the active material coating part 32 and the active material coating part 32. The probability of the conductive part 33 being inserted into the inside of the active material coating part 32 due to redundancy and the groove wall of the opening groove 334 close to the active material coating part 32 is reduced, so that the risk of short circuit of the battery monomer 102 can be reduced, and the use reliability of the battery monomer 102 can be improved.

[0150] In some embodiments, one end of the conductive part 33 is directly connected with the active material coating part 32, and the other end is directly connected with the pole body 21. That is, the active material coating part 32 is connected with the pole body 21 through the conductive part 33 and forms an electrical conduction. In this way, the structure of the battery monomer 102 can be simplified, and the production efficiency of the battery monomer 102 can be improved.

[0151] Exemplarily, the battery 100 includes a busbar component located outside the battery monomer 102, and the pole body 21 is connected with the busbar component to form an electrical conduction, so that a plurality of battery monomers 102 can be connected through the busbar component.

[0152] Exemplarily, when the pole component 2 is a negative electrode, the pole body 21 can be a copper-aluminum composite part, which can include an aluminum part and a copper part. The aluminum part is arranged on the side of the copper part away from the active material coating part 32, which is easy to form a reliable connection with the aluminum busbar component, and the copper part is easy to connect with the copper foil tab 311 of the negative electrode. When the pole component 2 is a positive electrode, the pole body 21 can be an aluminum part, which is easy to form a reliable connection with the aluminum busbar component, and the aluminum part is also easy to connect with the aluminum foil tab 311 of the positive electrode.

[0153] The connection mode of the conductive part 33 with the pole component 2 is not limited, for example, can include, but is not limited to, ultrasonic welding, combination of ultrasonic pre-welding and laser welding, resistance welding, pressure fusion welding, brazing, cementation, etc.

[0154] Please refer to FIG. 4 and FIG. 5, and further refer to FIG. 6-FIG. 8, FIG. 6 is a structural schematic diagram of the insulating support 9 of the battery monomer 102 according to some embodiments of the present application; FIG. 7 is an assembly diagram of the insulating support 9 of the battery monomer 102 and the electrode component 3 according to some embodiments of the present application; FIG. 8 is another assembly diagram of the insulating support 9 of the battery monomer 102 and the electrode component 3 according to some embodiments of the present application. In the embodiments of the present application, the insulating member includes the insulating support 9, which is arranged at one end of the active material coating part 32 close to the mounting wall 111. The insulating support 9 can support the active material coating part 32 of the electrode component 3, and can also isolate the active material coating part 32 from the mounting wall 111 of the shell component 1, thereby reducing the probability of contact between the active material coating part 32 and the mounting wall 111 of the shell component 1, and thus reducing the risk of corrosion of the mounting wall 111 of the shell component 1 due to the naked exposure of the active material coating part 32, reducing the risk of liquid leakage, and thereby improving the reliability and stability of the battery monomer 102.

[0155] The avoiding hole includes a first avoiding hole 901. The insulating support 9 is provided with the first avoiding hole 901. In this way, the conductive part 33 can pass through the first avoiding hole 901, so that the conductive part 33 can be electrically connected with the pole body 21. The insulating support 9 at least partially extends into the opening groove 334, and the insulating support 9 and the conductive part 33 form at least part of the groove wall of the opening groove 334, thereby providing support for the conductive part 33.

[0156] The number of the first avoiding hole 901 provided on the insulating support 9 is related to the number of the pole component 2 on the mounting wall 111 of the shell component 1 and the number of the conductive part 33 of the electrode component 3 arranged opposite to the mounting wall 111. If the mounting wall 111 of the shell component 1 is provided with one pole component 2 and the position of the electrode component 3 opposite to the mounting wall 111 has one conductive part 33, then the insulating support 9 is provided with one first avoiding hole 901. If the mounting wall 111 of the shell component 1 is provided with two pole components 2 and the position of the electrode component 3 opposite to the mounting wall 111 has two conductive parts 33, then the insulating support 9 is provided with two first avoiding holes 901, and the two first avoiding holes 901 correspond to the two pole components 2 one by one, so that the two conductive parts 33 on the same side of the electrode component 3 can pass through the two first avoiding holes 901 of the insulating support 9 one by one, and be electrically connected with the pole body 21 of the two pole components 2 on the mounting wall 111 one by one.

[0157] In the assembly of the battery cell 102, the conductive part 33 of the electrode component 3 can be first passed out of the first avoiding hole 901 of the insulating support 9, then connected with the pole component 2, and finally connected with the shell component 1 with the pole component 2 connected with the electrode component 3. Alternatively, the conductive part 33 of the electrode component 3 can be first connected with the pole component 2, then passed out of the first avoiding hole 901 of the insulating support 9 with the conductive part 33 and the pole component 2, and finally connected with the shell component 1 with the pole component 2 passed out of the first avoiding hole 901. Of course, other sequences can also be adopted based on the specific structures of the shell component 1, the pole component 2 and the electrode component 3.

[0158] After the combination of the shell component 1, the pole component 2 and the electrode component 3, the conductive part 33 is bent and arranged, and the insulating support 9 can press against the conductive part 33 to support the conductive part 33, so as to reshape the conductive part 33 and make the conductive part 33 maintain a preset bending shape.

[0159] Therefore, in the above technical solution, the insulating support 9 is arranged at one end of the active material coating part 32 close to the mounting wall 111, the conductive part 33 can be reshaped by the insulating support 9, the conductive part 33 can maintain a preset bending shape, and the gap between the groove wall of the opening groove 334 away from the active material coating part 32 and the active material coating part 32 can be blocked, so as to reduce the probability that the conductive part 33 is inserted into the inside of the active material coating part 32 or the groove wall of the opening groove 334 close to the active material coating part 32 due to redundancy, thereby reducing the risk of short circuit of the battery cell 102 and improving the use reliability of the battery cell 102.

[0160] Please refer to FIGS. 7 and 8 again. In the embodiment of the present application, the insulating support 9 includes a support body 91 arranged at one end of the active material coating part 32 close to the mounting wall 111, and the first avoiding hole 901 is formed in the support body 91. The first avoiding hole 901 has a first hole wall 9011 and a second hole wall 9012, and the first hole wall 9011 and the second hole wall 9012 are oppositely arranged in the width direction (the second direction F2 shown in the figure, i.e. the thickness direction of the active material coating part 32) of the pole body 21.

[0161] The support body 91 can support the active material coating part 32 and isolate the active material coating part 32 from the mounting wall 111 of the shell component 1, thereby reducing the probability of contact between the active material coating part 32 and the mounting wall 111, reducing the risk of corrosion of the mounting wall 111 of the shell component 1 due to the exposure of the active material coating part 32, reducing the risk of liquid leakage, and thereby improving the reliability and stability of the battery cell 102.

[0162] The insulating support 9 further comprises a first partition sheet 92, which is arranged at the first hole wall 9011 and connected with the support body 91, extends towards the center of the first avoiding hole 901, extends into the opening groove 334, and abuts with at least part of the groove wall of the opening groove 334 formed by the conductive part 33.

[0163] For the convenience of understanding, the first partition sheet 92 can be defined as having a first side edge and a second side edge arranged opposite in the second direction F2, the second side edge of the first partition sheet 92 is arranged closer to the center of the first avoiding hole 901 than the first side edge, the first side edge of the first partition sheet 92 is connected with the first hole wall 9011 of the first avoiding hole 901, and when the conductive part 33 is arranged in a bent manner, the first partition sheet 92 can extend into the opening groove 334 formed by the conductive part 33 and abut with the conductive part 33 to press and support the conductive part 33.

[0164] Therefore, in the above technical solution, by arranging the insulating support 9 to comprise the above support body 91 and the first partition sheet 92, the first partition sheet 92 can press and support the bent part of the conductive part 33, so that the conductive part 33 can maintain a preset bent shape, the bending shape of the conductive part 33 is controllable, and the conductive part 33 can be blocked between the part of the conductive part 33 and the active material coating part 32, so as to reduce the probability that the conductive part 33 is inserted into the inside of the active material coating part 32 in redundancy, thereby reducing the risk of short circuit of the battery monomer 102 and improving the use reliability of the battery monomer 102.

[0165] Please refer to FIGS. 7 and 8 again, in the embodiment of the present application, the first partition sheet 92 extends horizontally from the first hole wall 9011 to the second hole wall 9012, or the first partition sheet 92 extends obliquely towards the active material coating part 32.

[0166] Since the plurality of tab sheets 311 of the conductive part 33 are close to each other to form a structure with a certain slope near the root of the active material coating part 32, by arranging the first partition sheet 92 in the above structure, after the conductive part 33 is arranged in place, the first partition sheet 92 abuts with the conductive part 33 near the root of the active material coating part 32, so that the conductive part 33 near the root of the active material coating part 32 is more compact, so that the conductive part 33 can maintain a preset gathering shape and cannot be dispersed, thereby further reducing the probability that the conductive part 33 is inserted into the inside of the active material coating part 32.

[0167] In addition, the first partition sheet 92 can occupy less internal space of the first avoiding hole 901 away from the active material coating part 32, and the conductive part 33 can have more space reserved for the active material coating part 32, and even the pole piece 2, which is beneficial to reduce the size of the conductive part 33 in the thickness direction of the mounting wall 111, thereby reducing the size of the battery cell 102 in the thickness direction of the mounting wall 111.

[0168] In the embodiments of the present application, the thickness of the first partition sheet 92 is less than the thickness of the bracket body 91, which can reduce the occupied space of the first partition sheet 92 in the first avoiding hole 901, thereby reserving more space for the conductive part 33, and even the pole piece 2, which is beneficial to improve the energy density of the electrode part 3.

[0169] For example, the side of the first partition sheet 92 close to the active material coating part 32 can be farther away from the active material coating part 32 than the side of the bracket body 91 close to the active material coating part 32, which can reduce the occupied space of the first partition sheet 92 in the first avoiding hole 901 close to the active material coating part 32, and reserve space for the root of the conductive part 33 close to the active material coating part 32.

[0170] For another example, the side of the first partition sheet 92 away from the active material coating part 32 can be closer to the active material coating part 32 than the side of the bracket body 91 away from the active material coating part 32, which can reduce the occupied space of the first partition sheet 92 in the first avoiding hole 901 away from the active material coating part 32, and reserve more space for the root of the conductive part 33 close to the active material coating part 32, and even the pole piece 2.

[0171] Referring again to FIG. 6, the size of the first partition sheet 92 in the length direction of the pole body 21 is less than the size of the first avoiding hole 901 in the length direction of the pole body 21, and the two sides of the first partition sheet 92 in the length direction of the pole body 21 (the third direction F3 shown in the figure, i.e. the width direction of the active material coating part 32) are separated from the hole wall of the first avoiding hole 901, so that the first partition sheet 92 can be deformed under the pressure of the conductive part 33.

[0172] Therefore, in the above technical solution, by limiting the first partition sheet 92 to meet the above conditions, the first partition sheet 92 can be deformed under external force (such as the pressure of the conductive part 33), so that the first partition sheet 92 can be deformed according to the root of the conductive part 33 adjacent to the active material coating part 32, and the root of the conductive part 33 adjacent to the active material coating part 32 is pressed to make the root of the conductive part 33 adjacent to the active material coating part 32 more compact, so that the conductive part 33 can maintain the preset gathering shape and cannot be dispersed.

[0173] The first partition sheet 92 can be made of a soft material, so that the first partition sheet 92 can be deformed under the action of the conductive part 33, and the shape of the first partition sheet 92 is shaped to the root of the active material coated part 32 adjacent to the conductive part 33.

[0174] In the embodiment of the present application, in the length direction of the pole body 21 (the third direction F3 shown in the figure), the size of the first partition sheet 92 is greater than or equal to the size of the conductive part 33.

[0175] In the above technical solution, by controlling the size of the first partition sheet 92 in the length direction of the pole body 21 to meet the above condition, the first partition sheet 92 can be extended beyond the two sides of the conductive part 33 in the length direction of the pole body 21, so that the first partition sheet 92 can completely separate the part of the conductive part 33 away from the active material coated part 32 from the active material coated part 32, which can greatly reduce the probability of the conductive part 33 being inserted into the inside of the active material coated part 32 due to redundancy, further reduce the risk of short circuit of the battery monomer 102, and also reduce the local deformation problem caused by the first partition sheet 92 pressing the conductive part 33 in a part of the length direction of the pole body 21, thereby reducing the risk of failure and damage of the conductive part 33, and further improving the reliability and stability of the battery monomer 102.

[0176] Please refer to Fig. 5 again, in the embodiment of the present application, the conductive part 33 includes a converging section 331, a first extension section 332 and a second extension section 333, the converging section 331, the first extension section 332 and the second extension section 333 are arranged in the extension direction of the conductive part 33, the converging section 331 is connected with the active material coated part 32, the second extension section 333 is connected with the pole body 21, the first end of the first extension section 332 is connected with the converging section 331 through a first bending part 3320, and the other end of the first extension section 332 is connected with the second extension section 333 through a second bending part 3330, so that the conductive part 33 forms at least two open grooves 334 arranged in the thickness direction of the mounting wall 111, and the openings of the two open grooves 334 are in different directions, that is, the conductive part 33 can present a reciprocating bending serpentine shape.

[0177] The conductive part 33 is bent to form the above-mentioned shape, on the one hand, so that the conductive part 33 can play a better buffering role, and when the battery monomer 102 is used in a vibrating environment, the vibration can be absorbed to protect the electrode component 3 and improve the reliability of the battery monomer 102, on the other hand, by providing two open grooves 334, the conductive part 33 is regularly bent, and the bent part is not easy to insert into the inside of the active material coating part 32 due to redundancy, thereby reducing the risk of short circuit of the battery monomer 102, and also improving the mutual interference and rubbing between the tab sheet 311 and the tab sheet 311 in the conductive part 33, reducing the lithium precipitation phenomenon, and further improving the reliability of the battery monomer 102.

[0178] The first separation sheet 92 at least partially extends into the open groove 334 between the first extension section 332 and the approaching section 331, and at least abuts the first extension section 332. The first separation sheet 92 can separate the first extension section 332 and the second extension section 333 from the active material coating part 32, reduce the probability that the first extension section 332 and the second extension section 333 insert into the inside of the active material coating part 32 due to redundancy, and further reduce the risk of short circuit of the battery monomer 102. By abutting the first separation sheet 92 with the first extension section 332, the first separation sheet 92 can support the first extension section 332, so that the conductive part 33 can maintain the bent shape with at least two open grooves 334.

[0179] Please refer to FIG. 7 again. In the embodiment of the present application, in the width direction of the pole body 21 (the second direction F2 as shown in the figure), the size of the overlapping area of the first separation sheet 92 and the first extension section 332 is greater than half of the size of the first extension section 332 and less than the size of the first extension section 332.

[0180] The "overlapping area" here refers to the part where the projection of the first separation sheet 92 on a plane perpendicular to the height direction of the active material coating part 32 overlaps with the projection of the first extension section 332 on the plane. Specifically, the size of the overlapping area of the first separation sheet 92 and the first extension section 332 in the width direction of the pole body 21 is L1, the size of the first extension section 332 in the width direction of the pole body 21 is L2, L1 is greater than half of L2, and L1 is less than L2, for example, L1 can be 0.6, 0.7, 0.8, 0.9 times of L2.

[0181] In the above technical solution, by limiting the size of the overlapping area of the first separation sheet 92 and the first extension section 332 to meet the above range, the first separation sheet 92 can effectively support the first extension section 332, and improve the reliability of the conductive part 33 in the bent shape with at least two open grooves 334.

[0182] Please refer to FIG. 9-FIG. 12, FIG. 9 is a structural schematic diagram of the insulating support 9 of the battery monomer 102 according to some embodiments of the present application; FIG. 10 is a structural sectional view of the insulating support 9 of the battery monomer 102 shown in FIG. 9; FIG. 11 is an assembly diagram of the insulating support 9 of the battery monomer 102 and the electrode component 3 according to some embodiments of the present application; FIG. 12 is another assembly diagram of the insulating support 9 of the battery monomer 102 and the electrode component 3 according to some embodiments of the present application. In the embodiments of the present application, the insulating support 9 further comprises a second partition sheet 93, the second partition sheet 93 is arranged at the second hole wall 9012, and the second partition sheet 93 is connected with the support body 91, and the second partition sheet 93 extends towards the direction close to the center of the first avoiding hole 901.

[0183] The first partition sheet 92 is arranged in the interval with the first partition sheet 92, and the first partition sheet 92 and the second partition sheet 93 form a through hole 902 therebetween, the through hole 902 is communicated with the first avoiding hole 901, the conductive part 33 is arranged in the through hole 902, and the second partition sheet 93 abuts against the conductive part 33.

[0184] In the above technical solution, by arranging the insulating support 9 to comprise the first partition sheet 92 and the second partition sheet 93, the first partition sheet 92 and the second partition sheet 93 can respectively abut against the opposite sides of the conductive part 33 adjacent to the root of the active material coating part 32, and further make the conductive part 33 adjacent to the root of the active material coating part 32 more compact, so that the conductive part 33 can maintain the preset gathering shape and cannot be dispersed.

[0185] Among them, the second partition sheet 93 extends horizontally from the second hole wall 9012 to the first hole wall 9011, or the second partition sheet 93 extends obliquely towards the direction close to the active material coating part 32.

[0186] Since the plurality of tab sheets 311 of the conductive part 33 are adjacent to the root of the active material coating part 32 and are close to each other to form a structure with a certain slope, by arranging the second partition sheet 93 to have the above structure, after the conductive part 33 is arranged in place, the second partition sheet 93 and the conductive part 33 abut against each other adjacent to the root of the active material coating part 32, so that the conductive part 33 adjacent to the root of the active material coating part 32 is more compact, so that the conductive part 33 can maintain the preset gathering shape and cannot be dispersed, so that the probability of the conductive part 33 passing through the through hole 902 and inserting the plurality of tab sheets 311 of the conductive part 33 adjacent to the root of the active material coating part 32 can be further reduced.

[0187] In addition, the arrangement can reduce the space occupied by the second partition sheet 93 in the interior space of the first avoiding hole 901 away from the active material coating portion 32, and reserve more space for the conductive portion 33 away from the active material coating portion 32, or even the pole piece 2, which is conducive to reducing the size of the conductive portion 33 in the thickness direction of the mounting wall 111 after bending, so as to reduce the size of the battery monomer 102 in the thickness direction of the mounting wall 111.

[0188] The thickness of the second partition sheet 93 is less than the thickness of the bracket body 91, which can reduce the space occupied by the second partition sheet 93 in the first avoiding hole 901, so as to reserve more space for the conductive portion 33, or even the pole piece 2, which is conducive to improving the energy density of the electrode piece 3. The second partition sheet 93 is separated from the hole wall of the first avoiding hole 901 on both sides in the length direction of the pole body 21 (the third direction F3 shown in the figure, that is, the width direction of the active material coating portion 32), so that the second partition sheet 93 can be deformed under the pressure of the conductive portion 33.

[0189] In the embodiments of the present application, the size of the through hole 902 in the width direction of the pole body 21 is greater than or equal to the thickness of the conductive portion 33.

[0190] In the above technical solution, by limiting the size of the through hole 902 in the width direction of the pole body 21 to meet the above condition, the conductive portion 33 can smoothly pass through the through hole 902, reducing the scratching of the conductive portion 33 by the first partition sheet 92 and the second partition sheet 93, thereby reducing the risk of failure and damage of the conductive portion 33, and improving the reliability and stability of the battery monomer 102.

[0191] The position of the through hole 902 between the first partition sheet 92 and the second partition sheet 93 can be aligned with the gathering position of the plurality of tab pieces 311 of the conductive portion 33 adjacent to the active material coating portion 32, and the position of the through hole 902 between the first partition sheet 92 and the second partition sheet 93 can be adjusted according to the gathering position of the plurality of tab pieces 311 of the conductive portion 33 adjacent to the active material coating portion 32.

[0192] For example, if the gathering position of the plurality of tab pieces 311 of the conductive portion 33 adjacent to the active material coating portion 32 is aligned with the middle of the width direction of the active material coating portion 32, the through hole 902 formed between the first partition sheet 92 and the second partition sheet 93 can be aligned with the middle of the width direction of the active material coating portion 32.

[0193] For example, if the plurality of tab pieces 311 of the conductive portion 33 are arranged eccentrically relative to the middle of the width direction of the active material coated portion 32 at the converging position of the active material coated portion 32, the perforation 902 formed between the first partition piece 92 and the second partition piece 93 can be arranged eccentrically relative to the middle of the width direction of the active material coated portion 32.

[0194] Referring again to FIG. 9, in an embodiment of the present application, the size of the second partition piece 93 in the length direction of the pole body 21 is greater than or equal to the size of the conductive portion 33.

[0195] In the above technical solution, by controlling the size of the second partition piece 93 in the length direction of the pole body 21 to satisfy the above condition, the second partition piece 93 can extend beyond both sides of the conductive portion 33 in the length direction of the pole body 21, which can reduce the problem of local deformation caused by the second partition piece 93 pressing against a portion of the conductive portion 33 in the length direction of the pole body 21, thereby reducing the risk of failure and damage of the conductive portion 33 and further improving the reliability and stability of the battery monomer 102.

[0196] Referring again to FIG. 5, in an embodiment of the present application, the conductive portion 33 includes a converging section 331, a first extending section 332, and a second extending section 333 arranged in the extending direction thereof, the converging section 331 is connected with the active material coated portion 32, the second extending section 333 is connected with the pole body 21, a first end of the first extending section 332 is connected with the converging section 331 through a first bending portion 3320, and the other end of the first extending section 332 is connected with the second extending section 333 through a second bending portion 3330, so that the conductive portion 33 forms at least two open grooves 334 arranged in the thickness direction of the mounting wall 111, and the openings of the two open grooves 334 face different directions, i.e., the conductive portion 33 can present a reciprocatingly bent serpentine shape.

[0197] By bending the conductive portion 33 into the above shape, on the one hand, the conductive portion 33 can play a better buffering role, and when the battery monomer 102 is used in a vibrating environment, it can absorb vibrations and protect the electrode component 3, thereby improving the reliability of the battery monomer 102, on the other hand, by arranging two open grooves 334, the conductive portion 33 is regularly bent, and the bent portion is less likely to be inserted into the interior of the active material coated portion 32 due to redundancy, thereby reducing the risk of short circuit of the battery monomer 102, and also improving the mutual interference and rubbing between the tab pieces 311 and the tab pieces 311 in the conductive portion 33, reducing the lithium precipitation phenomenon, and further improving the reliability of the battery monomer 102.

[0198] In the above technical solution, by controlling the size of the second partition piece 93 in the length direction of the pole body 21 to satisfy the above condition, the second partition piece 93 can extend beyond both sides of the conductive portion 33 in the length direction of the pole body 21, which can reduce the problem of local deformation caused by the second partition piece 93 pressing against a portion of the conductive portion 33 in the length direction of the pole body 21, thereby reducing the risk of failure and damage of the conductive portion 33 and further improving the reliability and stability of the battery monomer 102.

[0196] Referring again to FIG. 5, in an embodiment of the present application, the conductive portion 33 includes a converging section 331, a first extending section 332, and a second extending section 333 arranged in the extending direction thereof, the converging section 331 is connected with the active material coated portion 32, the second extending section 333 is connected with the pole body 21, a first end of the first extending section 332 is connected with the converging section 331 through a first bending portion 3320, and the other end of the first extending section 332 is connected with the second extending section 333 through a second bending portion 3330, so that the conductive portion 33 forms at least two open grooves 334 arranged in the thickness direction of the mounting wall 111, and the openings of the two open grooves 334 face different directions, i.e., the conductive portion 33 can present a reciprocatingly bent serpentine shape.

[0199] In the above technical solution, extending the second partition sheet 93 towards the opening slot 334 between the first extension section 332 and the second extension section 333, and separating the second extension section 333 from the converging section 331, can reduce the risk of short circuit of the battery monomer 102; abutting the second partition sheet 93 with the converging section 331, so that the second partition sheet 93 can constrain the form of the converging section 331, thereby making the conductive part 33 adjacent to the root of the active material coating part 32 more compact, and further making the conductive part 33 can maintain the preset converging form and cannot be dispersed.

[0200] Please refer to FIG. 11 again, in the embodiment of the present application, in the width direction of the pole body 21, the size of the overlapping area of the second partition sheet 93 and the converging section 331 is less than half of the size of the converging section 331.

[0201] Here, the "overlapping area" refers to the part of the second partition sheet 93 in the projection of the above plane and the projection of the converging section 331 in the above plane. Specifically, the size of the overlapping area of the second partition sheet 93 and the converging section 331 in the width direction of the pole body 21 is L3, the size of the converging section 331 in the width direction of the pole body 21 is L4, L3 is less than half of L4, for example, L3 can be 0.2, 0.3, 0.4 times of L4.

[0202] In the above technical solution, by limiting the size of the overlapping area of the second partition sheet 93 and the converging section 331 to meet the above range, the converging section 331 and the first extension section 332 of the conductive part 33 can maintain the preset form, so that the bending form of the conductive part 33 can be controlled.

[0203] The assembling process of the battery cell 102 according to the embodiments of the present application is described as follows. Please refer to FIG. 13, which is an assembly view of the insulating support 9 of the battery cell 102 shown in FIG. 9 and the housing component 1. In the embodiment where the mounting wall 111 is the wall opposite to the housing body 11 and the housing cover 12, the insulating support 9 can be pre-assembled into the housing body 11, and the insulating support 9 abuts against the inner surface of the mounting wall 111. Before the electrode assembly 31 covered with the insulating film 7 is assembled into the housing component 1, the first partition sheet 92 and the second partition sheet 93 of the insulating support 9 are arranged to be inclined with respect to the thickness direction of the mounting wall 111. Please refer to FIG. 14 and FIG. 15, which are structural schematic views of the electrode component 3 of the battery cell 102 according to some embodiments of the present application before and after the insulating support 9 is deformed. During the assembling process of the electrode assembly 31 covered with the insulating film 7 into the housing component 1, the conductive part 33 can pass through the perforation 902 between the first partition sheet 92 and the second partition sheet 93, and when the active material coating part 32 abuts against the support body 91, the first partition sheet 92 and the second partition sheet 93 can also be deformed towards the side away from the active material coating part 32, thereby forming the structure shown in FIG. 24. Please refer to FIG. 16 and FIG. 17, which are partial structural schematic views of the connection between the conductive part 33 of the battery cell 102 shown in FIG. 15 and the pole component 2, and the connection between the pole component 2 of the battery cell 102 shown in FIG. 15 and the housing component 1. After the active material coating part 32 is assembled into the housing component 1, the conductive part 33 extends out of the perforation 902, and then the conductive part 33 is connected with the pole component 2. The pole component 2 is flipped to cover the mounting hole 112 on the mounting wall 111, and finally the pole component 2 is connected with the mounting wall 111, thereby realizing the assembling of the battery cell 102.

[0204] Please refer to FIG. 18 and FIG. 19, which are structural schematic views of the electrode component 3 and the insulating film 7 of the battery cell 102 according to some embodiments of the present application, and the electrode component 3 and the insulating film 7 of the battery cell 102 according to some other embodiments of the present application. In the embodiments of the present application, the insulating member includes the insulating film 7, and the insulating film 7 fully covers the active material coating part 32. The insulating film 7 can be used to isolate the active material coating part 32 from the housing component 1, and reduce the probability of the contact between the active material coating part 32 and the housing component 1, thereby reducing the risk of the corrosion of the housing component 1 caused by the exposure of the active material coating part 32, reducing the risk of the failure of the active material coating part 32 itself, and reducing the risk of the liquid leakage, and thus improving the reliability and stability of the battery cell 102.

[0205] The avoiding hole includes a second avoiding hole 701. The second avoiding hole 701 is arranged at a position opposite to the mounting wall 111 of the insulating film 7, and the thickness of the second avoiding hole 701 is matched with the thickness of the conductive part 33. The insulating film 7 forms a peripheral wall of the second avoiding hole 701, which is blocked between the insulating support 9 and the active material coating part 32. The conductive part 33 is sequentially arranged in the second avoiding hole 701 and the first avoiding hole 901, and connected with the pole body 21.

[0206] Here, the "size of the second avoiding hole 701 is matched with the thickness of the conductive part 33" means that the size of the second avoiding hole 701 in the thickness direction of the conductive part 33 is matched with the thickness of the conductive part 33.

[0207] The size of the second avoiding hole 701 itself cannot be too small, or the size of the second avoiding hole 701 in the use state (the size of the second avoiding hole 701 under the extrusion of the conductive part 33) cannot be too small, otherwise the conductive part 33 cannot be smoothly and quickly arranged. The size of the second avoiding hole 701 itself cannot be too large, or the size of the second avoiding hole 701 in the use state (the size of the second avoiding hole 701 under the extrusion of the conductive part 33) cannot be too large, otherwise the risk of the active material coating part 32 being exposed will increase.

[0208] In the above technical solution, by matching the size of the second avoiding hole 701 with the thickness of the conductive part 33, on the one hand, the second avoiding hole 701 allows the conductive part 33 to pass through the insulating film 7, so that the conductive part 33 can be electrically connected with the pole body 21 of the pole part 2. On the other hand, when the conductive part 33 is arranged in the second avoiding hole 701, the insulating film 7 can also cover the position of the plurality of tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32, further insulating and protecting the active material coating part 32, reducing the risk of the active material coating part 32 being exposed. The plurality of tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32 are also insulated and protected, so that the part of the conductive part 33 passing through the second avoiding hole 701 is separated from the active material coating part 32 and the plurality of tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32, reducing the probability of the conductive part 33 being inserted into the inside of the active material coating part 32 and the plurality of tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32 due to redundancy, thereby reducing the risk of short circuit of the battery monomer 102.

[0209] In addition, the insulating film 7 can also isolate the active material coating portion 32 from the mounting wall 111 of the shell member 1, reduce the probability of the active material coating portion 32 contacting the mounting wall 111 of the shell member 1, thereby reducing the risk of the active material coating portion 32 being exposed to cause the mounting wall 111 of the shell member 1 to be corroded, reducing the risk of the active material coating portion 32 itself failing, and reducing the risk of liquid leakage, thereby improving the reliability and stability of the battery monomer 102.

[0210] Please refer to FIG. 18 again. In some optional embodiments of the present application, the second avoiding hole 701 is a normally open hole that is adapted to the thickness of the conductive portion 33, i.e., in the natural state of the insulating film 7 (the state in which the insulating film 7 is not pressed by the conductive portion 33), the size of the second avoiding hole 701 is greater than zero.

[0211] In the above technical solution, by setting the second avoiding hole 701 as a normally open hole, the conductive portion 33 can quickly pass through the insulating film 7, which is conducive to improving the efficiency of the insulating film 7 wrapping the active material coating portion 32, thereby improving the assembly efficiency of the battery monomer 102. In the process of the conductive portion 33 passing through the insulating film 7, the conductive portion 33 can avoid the insulating film 7, thereby reducing the probability of the conductive portion 33 being deformed and reducing the operation step of shaping the conductive portion 33, thereby improving the assembly efficiency of the battery monomer 102.

[0212] Please refer to FIG. 19 again, and further refer to FIG. 20, which is a structural schematic diagram of the insulating film 7 of the battery monomer 102 shown in FIG. 19. In some other optional embodiments of the present application, the position opposite to the mounting wall 111 of the insulating film 7 is provided with a tearing structure 702, which is adapted to be torn by the conductive portion 33 to form a second avoiding hole 701 that is adapted to the thickness of the conductive portion 33.

[0213] Specifically, in the process of wrapping the insulating film 7 on the outside of the active material coating portion 32, when the conductive portion 33 pries open the tearing structure 702 on the insulating film 7, an openable and closable second avoiding hole 701 can be formed on the insulating film 7, so that the conductive portion 33 can smoothly pass through the second avoiding hole 701. Since the second avoiding hole 701 has a self-closing property, after the conductive portion 33 is in place, the second avoiding hole 701 can gradually tend to close, so that the insulating film 7 can cover at least part of the plurality of tab pieces 311 of the conductive portion 33 adjacent to the root of the active material coating portion 32.

[0214] Therefore, in the above technical solution, by pre-providing the tear structure 702 on the insulating film 7, during the process of coating the insulating film 7 outside the active material coating part 32, the second avoidance hole 701 that can be opened and closed can be formed. After the conductive part 33 is arranged in place, the second avoidance hole 701 can gradually tend to be closed, so that the insulating film 7 can cover at least part of the multiple tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32, thereby forming an insulating protection for the multiple tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32, and the part of the conductive part 33 passing through the second avoidance hole 701 is separated from the multiple tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32, thereby reducing the probability of the conductive part 33 being inserted into the inside of the active material coating part 32 and the multiple tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32 due to redundancy, so as to reduce the risk of short circuit of the battery monomer 102.

[0215] Please refer to FIG. 20 again, in the embodiment of the present application, the tear structure 702 includes a first tear part 7021 and a second tear part 7022, the first tear part 7021 extends along the length direction of the pole body 21 (the third direction F3 shown in the figure, i.e. the width direction of the active material coating part 32), and the second tear part 7022 extends along a direction that is at an angle to the length direction of the pole body 21, and the end of the first tear part 7021 is connected with the second tear part 7022.

[0216] For example, the second tear part 7022 can extend along the width direction of the pole body 21 (the thickness direction of the active material coating part 32 shown in the figure), so that the extension direction of the first tear part 7021 is perpendicular to the extension direction of the second tear part 7022. For another example, the second tear part 7022 can be arranged obliquely relative to the length direction of the pole body 21, so that the extension direction of the first tear part 7021 is arranged at an acute angle or an obtuse angle to the extension direction of the second tear part 7022.

[0217] Among them, the first tear part 7021 and the second tear part 7022 can both be point breaking structures. Specifically, each of the first tear part 7021 and the second tear part 7022 includes multiple connection parts and multiple breaking parts, which can be arranged in the extension direction of the first tear part 7021 and the second tear part 7022 respectively, when the conductive part 33 opens the tear structure 702 on the insulating film 7, the multiple connection parts of the first tear part 7021 and the multiple connection parts of the second tear part 7022 are broken, thereby forming the second avoidance hole 701 that can be opened and closed at the tear structure 702 of the insulating film 7.

[0218] Of course, the first tearable portion 7021 and the second tearable portion 7022 can both be thickness-reduced structures that can be torn under the extrusion of the conductive portion 33 to form the openable second avoiding hole 701; or one of the first tearable portion 7021 and the second tearable portion 7022 is a point-breaking structure, and the other is a thickness-reduced structure.

[0219] In the above technical solution, by setting the tearable structure 702 to include the first tearable portion 7021 and the second tearable portion 7022 arranged at an included angle, the second avoiding hole 701 formed is openable, the opening degree of the second avoiding hole 701 can be adjusted according to the shape of the root of the conductive portion 33 adjacent to the active material coating portion 32, the conductive portion 33 can be smoothly arranged in the second avoiding hole 701, the risk of the insulating film 7 being severely torn can be reduced, the insulation protection performance of the insulating film 7 on the active material coating portion 32 is further improved, the probability of the conductive portion 33 being reversely inserted into the inside of the active material coating portion 32 due to redundancy is further reduced, and thus the risk of short circuit of the battery monomer 102 is further reduced.

[0220] Please refer to FIG. 20 again. In the embodiment of the present application, the end of the first tearable portion 7021 is connected to the middle of the second tearable portion 7022, that is, the end of the first tearable portion 7021 in the extension direction is connected to the middle of the second tearable portion 7022 in the extension direction, so that the insulating film 7 forms at least two openable insulating pieces at the tearable structure 702, so that during the process of the conductive portion 33 passing through the second avoiding hole 701, the two insulating pieces can be located on at least opposite sides of the conductive portion 33 to cover at least opposite sides of the plurality of tab pieces 311 of the conductive portion 33 adjacent to the root of the active material coating portion 32, so that the part of the conductive portion 33 passing through the second avoiding hole 701 is separated from at least opposite sides of the plurality of tab pieces 311 of the conductive portion 33 adjacent to the root of the active material coating portion 32, the probability of the conductive portion 33 being reversely inserted into the inside of the active material coating portion 32 and the plurality of tab pieces 311 of the conductive portion 33 adjacent to the root of the active material coating portion 32 due to redundancy is reduced, and thus the risk of short circuit of the battery monomer 102 is further reduced.

[0221] Please refer to FIG. 21-23, FIG. 21 is a schematic structural diagram of the electrode component 3 and the insulating film 7 of the battery cell 102 according to some embodiments of the present application; FIG. 22 is a top view of the structure shown in FIG. 21; FIG. 23 is a sectional view of the structure of the electrode component 3 and the insulating film 7 shown in FIG. 21. In some embodiments of the present application, the number of the second tear-open portions 7022 is two, and the two second tear-open portions 7022 are arranged in a spaced manner to be connected to the two ends of the first tear-open portion 7021 respectively, so as to increase the adjustable opening degree of the second avoiding hole 701, to make the conductive portion 33 more smoothly pass through the second avoiding hole 701, and to further reduce the risk of the insulating film 7 being seriously torn, thereby further reducing the risk of the battery cell 102 short-circuiting.

[0222] In some embodiments of the present application, the second tear-open portion 7022 extends along the width direction of the pole body 21, and the extension direction of the second tear-open portion 7022 is arranged perpendicularly to the extension direction of the first tear-open portion 7021, so as to form two openable and closable insulating pieces at the tear-open structure 702, to improve the structural integrity of the insulating film 7 at the second avoiding hole 701 without affecting the effect of the conductive portion 33 passing through the insulating film 7, thereby improving the insulation protection performance of the insulating film 7, further reducing the probability of the conductive portion 33 being inserted into the inside of the active material coating portion 32 due to redundancy, and further reducing the risk of the battery cell 102 short-circuiting.

[0223] In some specific embodiments, the tear-open structure 702 includes the first tear-open portion 7021 and two second tear-open portions 7022, the first tear-open portion 7021 extends along the length direction of the pole body 21, and the two second tear-open portions 7022 are arranged in a spaced manner along the length direction of the pole body 21, each second tear-open portion 7022 extends along the width direction of the pole body 21, and the two ends of the extension direction of the first tear-open portion 7021 are connected to the middle portions of the extension directions of the two second tear-open portions 7022 respectively.

[0224] Therefore, in the above technical solution, the end of the first tearaway part 7021 is connected with the middle of the second tearaway part 7022, which can form at least two openable insulating pieces of the insulating film 7 at the tearaway structure 702, and the two insulating pieces can cover at least opposite sides of the multiple tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32, thereby reducing the probability of the conductive part 33 being inserted into the inside of the active material coating part 32 and the multiple tab pieces 311 of the conductive part 33 adjacent to the root of the active material coating part 32 due to redundancy, and further reducing the risk of short circuit of the battery monomer 102; the number of the second tearaway part 7022 is set to two, which can increase the adjustable opening degree of the second avoiding hole 701, and further reduce the risk of the insulating film 7 being seriously torn, thereby further reducing the risk of short circuit of the battery monomer 102; the second tearaway part 7022 extends along the width direction of the pole body 21, which can improve the structural integrity of the insulating film 7 at the second avoiding hole 701 without affecting the effect of the conductive part 33 passing through the insulating film 7, thereby improving the insulation protection performance of the insulating film 7, further reducing the probability of the conductive part 33 being inserted into the inside of the active material coating part 32 due to redundancy, and further reducing the risk of short circuit of the battery monomer 102.

[0225] Please refer to FIG. 20 again, in some specific embodiments, the insulating film 7 comprises a main insulating part 71, a first insulating part 72 and a second insulating part 73, the main insulating part 71 wraps the circumferential side of the active material coating part 32, the first insulating part 72 and the second insulating part 73 are respectively arranged at the two ends of the main insulating part 71, the first insulating part 72 is located at the side of the main insulating part 71 close to the mounting wall 111, and the first insulating part 72 wraps the end of the active material coating part 32 close to the mounting wall 111, the second insulating part 73 is located at the side of the main insulating part 71 away from the mounting wall 111, and the second insulating part 73 wraps the end of the active material coating part 32 away from the mounting wall 111, and the second avoiding hole 701 is arranged in the first insulating part 72.

[0226] The active material coated portion 32 can have a cross section in a shape of a circle, a rectangle, or a polygon. When the active material coated portion 32 has a cross section in a shape of a circle, the body insulating portion 71 can be wound in a shape that matches the shape of the circumferential side (cylindrical surface) of the active material coated portion 32 to wrap the circumferential side of the active material coated portion 32, i.e., the cross section of the body insulating portion 71 has a shape of a torus. When the active material coated portion 32 has a cross section in a shape of a rectangle, the body insulating portion 71 can be folded in a shape that matches the shape of the circumferential side (four side wall surfaces) of the active material coated portion 32 to wrap the circumferential side of the active material coated portion 32, i.e., the cross section of the body insulating portion 71 has a shape of a rectangular torus. When the active material coated portion 32 has a cross section in a shape of a polygon, the body insulating portion 71 can be folded in a shape that matches the shape of the circumferential side (a plurality of side wall surfaces) of the active material coated portion 32 to wrap the circumferential side of the active material coated portion 32, i.e., the cross section of the body insulating portion 71 has a shape of a polygonal torus.

[0227] In the state in which the battery cell 102 is vertically placed, the first insulating portion 72 covers one end of the active material coated portion 32, and the conductive portion 33 penetrates through the first insulating portion 72, the body insulating portion 71 wraps the circumferential side of the active material coated portion 32, and the second insulating portion 73 covers the other end of the active material coated portion 32.

[0228] Referring back to FIG. 20, the body insulating portion 71 includes a plurality of body portions 711 that are sequentially connected end to end in a ring shape, and the plurality of body portions 711 collectively wrap the circumferential side of the active material coated portion 32. The first insulating portion 72 and the second insulating portion 73 are respectively located at both axial ends of the ring-shaped structure formed by the plurality of body portions 711.

[0229] Specifically, the number of the body portions 711 can be two, three, or more, and can be selected according to the shape of the active material coated portion 32. For example, the number of the body portions 711 can correspond to the number of the faces of the circumferential side of the active material coated portion 32, i.e., the plurality of body portions 711 correspondingly cover the plurality of faces of the circumferential side of the active material coated portion 32. For another example, the number of the body portions 711 can be less than the number of the faces of the circumferential side of the active material coated portion 32, i.e., at least one of the body portions 711 has a surface area greater than that of one of the faces of the circumferential side of the active material coated portion 32, so that the body portion 711 can cover two or more of the faces of the circumferential side of the active material coated portion 32. For another example, the number of the body portions 711 can be greater than the number of the faces of the circumferential side of the active material coated portion 32, so that at least a part of the plurality of body portions 711 can be arranged in an overlapping manner.

[0230] Therefore, in the above technical solution, the insulating film 7 is composed of multiple parts, which can completely separate the active material coating part 32 from the shell part 1, so as to sufficiently reduce the exposure of the active material coating part 32, reduce the risk of failure and damage of the electrode part 3, reduce the risk of corrosion of the shell part 1, and improve the reliability and stability of the battery monomer 102.

[0231] Please refer to FIGS. 21-23 again, in the embodiment of the present application, the insulating film 7 is connected with the retaining sheet 8 around at least part of the circumferential direction of the second avoiding hole 701, and the hardness of the retaining sheet 8 is greater than that of the insulating film 7.

[0232] For example, the retaining sheet 8 and the insulating film 7 can be made of the same material, and the thickness of the retaining sheet 8 is greater than that of the insulating film 7; for another example, the retaining sheet 8 and the insulating film 7 can be made of different insulating materials.

[0233] The number of the retaining sheet 8 can be one and the retaining sheet 8 is located on one side of the second avoiding hole 701, of course, the number of the retaining sheet 8 can also be multiple, and multiple retaining sheets 8 are arranged in the circumferential direction of the second avoiding hole 701.

[0234] Please refer to FIG. 21, the number of the retaining sheet 8 is two, each retaining sheet 8 extends along the length direction of the active material coating part 32, and the two retaining sheets 8 are arranged in the thickness direction of the active material coating part 32, that is, the two retaining sheets 8 are arranged in the width direction of the pole body 21, and the positions between the adjacent two retaining sheets 8 are arranged opposite to the second avoiding hole 701 of the insulating film 7, so as to be penetrated by the conductive part 33.

[0235] In the above technical solution, by connecting the retaining sheet 8 on the insulating film 7, the rigidity of the insulating film 7 can be increased, so that the multiple tab sheets 311 of the conductive part 33 adjacent to the root of the active material coating part 32 can maintain the folded form, the probability of the conductive part 33 being inserted into the inside of the active material coating part 32 due to redundancy and the multiple tab sheets 311 of the conductive part 33 adjacent to the root of the active material coating part 32 can be reduced, thereby the risk of short circuit of the battery monomer 102 can be reduced.

[0236] Please refer to FIGS. 18, 21-23 again, in the embodiment in which the second avoiding hole 701 itself is a normally open hole matched with the thickness of the conductive part 33, the retaining sheet 8 can cover at least part of the outside of the insulating film 7 and be connected with the insulating film 7, or one side edge of the retaining sheet 8 can be connected with the hole edge of the second avoiding hole 701 and the other side extends towards the direction close to the center of the second avoiding hole 701.

[0237] Please refer to Fig. 19 again, and further refer to Figs. 24-26, Fig. 24 is a structural schematic diagram of the electrode component 3 and the insulating film 7 of the battery cell 102 according to some embodiments of the present application; Fig. 25 is a top view of the structure shown in Fig. 24; Fig. 26 is a sectional view of the structure of the electrode component 3 and the insulating film 7 shown in Fig. 24. In the embodiments in which the second avoiding hole 701 is formed by tearing the tearing structure 702 under the action of the conductive part 33, the retaining sheet 8 can cover the area on the insulating film 7 where the tearing structure 702 is located and be connected with the insulating film 7.

[0238] In the embodiments of the present application, the mounting wall 111 is provided with the pressure relief device 6, and the position of the insulating film 7 opposite to the pressure relief device 6 can be provided with the breaking structure 703, which can be in the form of the tearing structure 702 described above. When the pressure relief device 6 is opened, the breaking structure 703 can be opened more smoothly, which is beneficial to the exhaust.

[0239] Among them, the mounting wall 111 can be provided with one pole component 2, and the pressure relief device 6 and the pole component 2 can be arranged at intervals in the length direction of the mounting wall 111. The mounting wall 111 can also be provided with two pole components 2, and the two pole components 2 and the pressure relief device 6 can be arranged at intervals in the length direction of the mounting wall 111, and the pressure relief device 6 can be located between the two pole components 2.

[0240] Please refer to Fig. 5 again. In the embodiments of the present application, the conductive part 33 includes the converging section 331, the first extension section 332 and the second extension section 333, which are arranged in the extension direction of the conductive part 33. The converging section 331 is connected with the active material coating part 32, the second extension section 333 is connected with the pole body 21, and the two ends of the first extension section 332 are respectively connected with the converging section 331 and the second extension section 333.

[0241] Among them, the first extension section 332 is provided through the avoiding hole. In the embodiments in which the insulating member includes the insulating film 7, the insulating film 7 is provided with the second avoiding hole 701, and the first extension section 332 is provided through the second avoiding hole 701 and extends out of the second avoiding hole 701. In the embodiments in which the insulating member includes the insulating support 9, the insulating support 9 has the first avoiding hole 901, and the first extension section 332 is provided through the first avoiding hole 901.

[0242] The approaching section 331 and the second extension section 333 are respectively located on two sides of the insulating piece. The insulating piece can separate the approaching section 331 and the second extension section 333, so as to reduce the probability that the second extension section 333 is reversely inserted into the approaching section 331 due to redundancy, and the insulating piece can also separate the second extension section 333 from the active material coating part 32, so as to reduce the probability that the second extension section 333 is reversely inserted into the inside of the active material coating part 32 due to redundancy, thereby reducing the risk of short circuit of the battery monomer 102 and improving the reliability and stability of the battery monomer 102.

[0243] In the embodiments of the present application, the conductive part 33 includes a plurality of tab pieces 311 stacked and arranged, and the plurality of tab pieces 311 are close to each other near the root of the active material coating part 32 to form a triangular approaching section 331. The plurality of tab pieces 311 are close to and connected to form a first extension section 332 and a second extension section 333 at a position away from the active material coating part 32 of the approaching section 331.

[0244] For the convenience of understanding, a cross section perpendicular to the length direction (the third direction F3 shown in the figure) of the pole body 21 is taken, and the cross-sectional shape of the conductive part 33 is triangular.

[0245] The triangle can be an isosceles triangle, that is, the vertex angle of the triangle is centered with the middle position of the pole body 21 in the width direction of the pole body 21, so that the connection position of the approaching section 331 and the first extension section 332 is arranged centrally in the width direction of the pole body 21; or the vertex angle of the triangle can be offset from the middle position of the pole body 21 in the width direction of the pole body 21, so that the connection position of the approaching section 331 and the first extension section 332 can be offset from the middle of the pole body 21 in the width direction, thereby reserving a deformation amount for the bending of the conductive part 33.

[0246] In the above technical solution, the plurality of tab pieces 311 are close to each other near the root of the active material coating part 32 to form a triangular approaching section 331, so that the plurality of tab pieces 311 can be stacked and arranged, and form a whole that is not easy to loosen, thereby facilitating the connection of the conductive part 33 and the pole body 21.

[0247] Please refer to FIG. 5 again, in some optional embodiments of the present application, the first end of the first extension section 332 is connected with the approaching section 331 through the first bending part 3320, and a first open slot 3341 is defined among the three, the second end of the first extension section 332 is connected with the second extension section 333 through the second bending part 3330, and a second open slot 3342 is defined among the three, the openings of the first open slot 3341 and the second open slot 3342 are in different directions, and are arranged in the thickness direction of the mounting wall 111.

[0248] Specifically, the first extension segment 332 and the second extension segment 333 are arranged at an angle in opposite directions, two ends of the first bending part 3320 are connected with the approaching segment 331 and the initial end of the first extension segment 332 respectively, so as to define the first open slot 3341 by the approaching segment 331, the first bending part 3320 and the first extension segment 332, and two ends of the second bending part 3330 are connected with the terminal end of the first extension segment 332 and the initial end of the second extension segment 333 respectively, so as to define the second open slot 3342 by the first extension segment 332, the second bending part 3330 and the second extension segment 333.

[0249] For example, the openings of the first open slot 3341 and the second open slot 3342 are arranged in opposite directions, i.e. the openings of the first open slot 3341 and the second open slot 3342 are arranged at an angle of 180 degrees; for another example, the openings of the first open slot 3341 and the second open slot 3342 are arranged at an obtuse angle, so that the conductive part 33 is arranged in a substantially "S" shape.

[0250] Therefore, by arranging the conductive part 33 in a substantially "S" shape, on the one hand, the conductive part 33 can play a better buffering role, and when the battery monomer 102 is used in a vibrating environment, the vibration can be absorbed to protect the electrode component 3 and improve the reliability of the battery monomer 102, on the other hand, by arranging the first open slot 3341 and the second open slot 3342, the conductive part 33 is regularly bent, and the part of the conductive part 33 is not easy to insert into the inside of the active material coating part 32 due to redundancy, so as to reduce the risk of short circuit of the battery monomer 102, and also can improve the mutual interference and rubbing between the tab sheet 311 and the tab sheet 311 in the conductive part 33, reduce the lithium precipitation phenomenon, and further improve the reliability of the battery monomer 102.

[0251] The insulating part at least partially extends into the first open slot 3341 to be located between the first extension segment 332 and the active material coating part 32, and the insulating part can isolate the side of the first extension segment 332 facing the active material coating part 32 from the active material coating part 32, reduce the probability of the first extension segment 332 of the conductive part 33 inserting into the inside of the active material coating part 32 due to redundancy, so as to reduce the risk of short circuit of the battery monomer 102, and be beneficial to improve the use reliability of the battery monomer 102.

[0252] In the embodiments of the present application, the insulating piece extends at least partially towards the direction close to the second opening groove 3342, so as to be located between the second extension section 333 and the active material coating part 32. The insulating piece can be located between the second extension section 333 and the side of the first extension section 332 away from the active material coating part 32, or between the second extension section 333 and the side of the closing section 331 away from the active material coating part 32, so as to be located between the second extension section 333 and the active material coating part 32, further reducing the probability of the conductive part 33 being inserted into the active material coating part 32, the first extension section 332 or the closing section 331 in redundancy, so as to reduce the risk of short circuit of the battery monomer 102, and facilitate to improve the use reliability of the battery monomer 102.

[0253] Please refer to Figs. 5-8 again. In the embodiments of the present application, the first bending part 3320 is arranged at the center of the width direction of the pole body 21; or the first bending part 3320 is arranged at one side of the center of the width direction of the pole body 21, and the second bending part 3330 is arranged at the other side of the center of the width direction of the pole body 21. In this way, the first bending part 3320 and the second bending part 3330 are arranged in the width direction of the pole, so that the conductive part 33 can be arranged in the shape of "S", so as to meet the design requirements.

[0254] For example, referring to Figs. 5 and 6, the first bending part 3320 is arranged at the center of the width direction of the pole body 21, and the second bending part 3330 can be arranged to the left of the center of the width direction of the pole body 21. In addition, the opening of the opening groove 334 defined by the closing section 331, the first bending part 3320 and the first extension section 332 is to the left, and the opening of the opening groove 334 defined by the first extension section 332, the second bending part 3330 and the second extension section 333 is to the right, so that the conductive part 33 is arranged in the shape of "S".

[0255] For another example, referring to Fig. 8, the first bending part 3320 can be arranged to the right of the center of the width direction of the pole body 21, and the second bending part 3330 can be arranged to the left of the center of the width direction of the pole body 21. In addition, the opening of the opening groove 334 defined by the closing section 331, the first bending part 3320 and the first extension section 332 is to the left, and the opening of the opening groove 334 defined by the first extension section 332, the second bending part 3330 and the second extension section 333 is to the right, so that the conductive part 33 is arranged in the shape of "S".

[0256] Please refer to Fig. 5 again, and further refer to Figs. 27-29. Fig. 27 is a schematic view of the conductive part 33 of the battery cell 102 in a straightened state; Fig. 28 is a schematic view of the conductive part 33 of the battery cell 102 when connected with the pole part 2; and Fig. 29 is a schematic view of the pole part 2 of the battery cell 102 when connected with the shell part 1. In the embodiment of the present application, the conductive part 33 includes a plurality of tab pieces 311 stacked together, and the plurality of tab pieces 311 are connected at one end of the first bending part 3320 away from the approaching segment 331 to form a first connecting part 3331. The first bending part 3320 can be an arc-shaped structure, and the first connecting part 3331 can be located at a tangent position of the first bending part 3320 and the first extending segment 332.

[0257] Connecting the first bending part 3320 at one end away from the approaching segment 331 to form the first connecting part 3331 can connect the plurality of tab pieces 311 stacked together, and the plurality of tab pieces 311 are not easy to be loose at the first connecting part 3331. This can reduce the possibility of the tab pieces 311 being forked after being bent, causing the active material coating part 32 to be inserted upside down, thereby reducing the risk of short circuit of the battery cell 102 and improving the use reliability of the battery cell 102.

[0258] Please refer to Fig. 27 again. In the embodiment of the present application, when the conductive part 33 is in a straightened state, the distance h1 between the first connecting part 3331 and the end of the active material coating part 32 close to the mounting wall 111 is less than or equal to 2.5 mm.

[0259] Here, the "straightened state of the conductive part 33" refers to the state of the conductive part 33 extending along the height direction (the first direction F1 as shown in the figure) of the active material coating part 32 before being bent.

[0260] For example, the distance h1 between the first connecting part 3331 and the end of the active material coating part 32 close to the mounting wall 111 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc.

[0261] If the distance h1 between the first connecting part 3331 and the active material coated part 32 near the one end of the mounting wall 111 is too large, the size of the approaching section 331 in the thickness direction of the mounting wall 111 will be too large, which can cause the multiple tab pieces 311 to be loose at the approaching section 331, and the multiple tab pieces 311 can be forked to cause the possibility of inserting the active material coated part 32 inside upside down. If the distance h1 between the first connecting part 3331 and the active material coated part 32 near the one end of the mounting wall 111 is too small, the multiple tab pieces 311 can be loose at the first extending section 332, and the multiple tab pieces 311 can be forked to cause the possibility of inserting the active material coated part 32 inside upside down.

[0262] In the above technical solution, by limiting the distance between the first connecting part 3331 and the active material coated part 32 near the one end of the mounting wall 111 to be within the above range, the problem of the multiple tab pieces 311 being loose after the conductive part 33 is bent can be reduced, and the possibility of the multiple tab pieces 311 being forked to cause the active material coated part 32 to be inserted inside upside down can be reduced, thereby the risk of short circuit of the battery monomer 102 can be reduced, and the use reliability of the battery monomer 102 can be improved.

[0263] Please refer to FIG. 27 again. In the embodiment of the present application, an insulating support 9 is arranged between the end of the active material coated part 32 connected with the conductive part 33 and the mounting wall 111, the insulating support 9 has a through hole 902, the conductive part 33 is arranged in the through hole 902, and the conductive part 33 is connected with the pole body 21.

[0264] The insulating support 9 can support the active material coated part 32, and can also isolate the active material coated part 32 from the mounting wall 111 of the shell component 1, thereby reducing the probability of the active material coated part 32 contacting the mounting wall 111, and reducing the risk of the active material coated part 32 being exposed to cause the mounting wall 111 of the shell component 1 to be corroded, reducing the risk of liquid leakage, and thereby improving the reliability and stability of the battery monomer 102.

[0265] The one end of the through hole 902 near the active material coated part 32 has a first hole edge, the one end of the through hole 902 near the pole body 21 has a second hole edge, and the distance m1 between the first connecting part 3331 and the active material coated part 32 is greater than the distance m2 between the first hole edge and the active material coated part 32.

[0266] That is, in the state that the battery monomer 102 is vertically placed, the first hole edge is the lowest hole edge of the through hole 902, the second hole edge is the highest hole edge of the through hole 902, and the first connecting part 3331 is higher than the lowest edge of the through hole 902, so that the connecting position of the multiple tab pieces 311 at the one end of the first bending part 3320 away from the approaching section 331 is higher than the lowest edge of the through hole 902, further reducing the possibility of the conductive part 33 being loose, and more conducive to improving the use reliability of the battery monomer 102.

[0267] Please refer to FIG. 5 and FIG. 27 again, in the embodiment of the application, the plurality of tab pieces 311 are connected at the second bending part 3330 close to one end of the second extension section 333 to form a second connecting part 3332. Wherein, the second bending part 3330 can be an arc structure, and the position where the second connecting part 3332 is located can be the tangent position of the second bending part 3330 and the second extension section 333.

[0268] Connecting the second bending part 3330 close to one end of the second extension section 333 to form the second connecting part 3332 can make the originally stacked plurality of easily loose tab pieces 311 connected together, and the plurality of tab pieces 311 are not easy to loosen at the second connecting part 3332, which on the one hand can reduce the possibility of the tab pieces 311 diverging after being bent, causing the active material coating part 32 inside to be inserted upside down, and on the other hand facilitates the connection of the second extension section 333 and the pole body 21.

[0269] Please refer to FIG. 27 again, in the embodiment of the application, when the conductive part 33 is in a straightened state, the distance h2 between the first connecting part 3331 and the second connecting part 3332 is less than or equal to 16 mm, and the distance h3 between the second connecting part 3332 and one end of the second extension section 333 away from the active material coating part 32 is greater than or equal to 8 mm.

[0270] For example, the distance h2 between the first connecting part 3331 and the second connecting part 3332 can be 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, etc., and the distance h3 between the second connecting part 3332 and one end of the second extension section 333 away from the active material coating part 32 can be 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, etc.

[0271] In the above technical solution, by limiting the distance between the first connecting part 3331 and the second connecting part 3332 to meet the above range, on the one hand, it can reduce the problem of the plurality of tab pieces 311 loosening after the conductive part 33 is bent, and reduce the possibility of the tab pieces 311 diverging to cause the active material coating part 32 inside to be inserted upside down, on the other hand, after the conductive part 33 is bent, the second connecting part 3332 can be located between the pole body 21 and the second edge of the through hole 902 in the thickness direction of the mounting wall 111, thereby reducing the assembly space between the pole body 21 and the active material coating part 32, and making the structure of the battery monomer 102 more compact.

[0272] In addition, by limiting the distance between the second connecting portion 3332 and the one end of the second extension segment 333 away from the active material coated portion 32 to satisfy the above range, the connecting area of the second extension segment 333 and the pole body 21 can be ensured, so that the connecting reliability of the conductive portion 33 and the pole body 21 can be improved, the conduction between the electrode component 3 and the pole component 2 is more stable and reliable, and the use reliability of the battery monomer 102 is further improved.

[0273] Please refer to FIG. 5 again, in the embodiment of the application, the conductive portion 33 includes a tab 335, the tab 335 includes a plurality of tab pieces 311 stacked and arranged, the close-together segment 331, the first extension segment 332 and the second extension segment 333 are formed by different parts of the tab 335. That is, the tab 335 is directly connected with the pole body 21, so that the conductive piece 336 can be omitted, and the connecting step of the conductive piece 336 and the tab 335 is omitted, which is beneficial to improve the production efficiency of the battery monomer 102.

[0274] In addition, by pre-converging the plurality of tab pieces 311 of the tab 335, the second extension segment 333 of the conductive portion 33 can present a plate shape in which a plurality of tab pieces 311 are connected together and have a certain rigidity, rather than a fluffy and scattered multi-layer foil shape, so as to facilitate the matching connection of the tab 335 and the pole body 21, so that the welding of the tab 335 and the pole body 21 is more reliable, and it is not easy to form a gap in the weld, which can improve the connection reliability and conductivity of the welding position, and the conduction between the electrode component 3 and the pole component 2 is more stable and reliable.

[0275] Please refer to FIG. 5, FIG. 27-29 again, in the embodiment of the application, the plurality of tab pieces 311 are converged and connected to form the first extension segment 332 and the second extension segment 333 at the position of the close-together segment 331 away from the active material coated portion 32, the plurality of tab pieces 311 are connected to form a third connecting portion 3333 at the second extension segment 333, the third connecting portion 3333 is a long strip shape extending along the length direction of the pole body 21, and the third connecting portion 3333 is centrally arranged in the width direction of the pole body 21.

[0276] Among them, the plurality of tab pieces 311 can be connected by ultrasonic welding at the second extension segment 333 to form the third connecting portion 3333, so that the surfaces of any two adjacent tab pieces 311 are in close contact and connected, the welding strength and stability are higher, which is beneficial to improve the structural integrity and reliability of the conductive portion 33, and the welding speed of the ultrasonic welding is fast, which is beneficial to improve the welding efficiency. Of course, the plurality of tab pieces 311 can also be connected by laser welding at the second extension segment 333. And the second extension segment 333 and the pole body 21 can be connected by laser welding.

[0277] In the technical solution, the third connecting part 3333 is arranged in the width direction of the pole body 21, which can reduce the size requirement of the second extension section 333, thereby reducing the connection difficulty between the conductive part 33 and the pole body 21, and can also make the conductive part 33 bend towards the center position between the pole body 21 and the active material coating part 32, thereby controlling the shape of the conductive part 33 after bending.

[0278] Please refer to FIGS. 30-32, FIG. 30 is a structural sectional view of the battery cell 102 according to some embodiments of the present application; FIG. 31 is a partial enlarged view of the battery cell 102 shown in FIG. 30; and FIG. 32 is a partial structural schematic view of the conductive part 33 of the battery cell 102 shown in FIG. 30 when being shaped. In some embodiments of the present application, the conductive part 33 includes a tab 335 and a conductive piece 336, the tab 335 is connected to one end of the active material coating part 32 close to the mounting wall 111, and the tab 335 includes a plurality of tab pieces 311 arranged in layers, the conductive piece 336 is connected between the tab 335 and the pole body 21, a part of the conductive piece 336 forms the second extension section 333 and another part forms at least part of the first extension section 332, and at least part of the tab 335 forms the approaching section 331.

[0279] Therefore, by indirectly connecting the tab 335 and the pole body 21 through the conductive piece 336, the length of the tab 335 can be shortened, and the problems such as wrinkling, bending and breaking of the tab pieces 311 can be improved, and the shape and material of the conductive piece 336 can be designed flexibly to reduce the connection difficulty with the pole body 21 and improve the connection convenience of the conductive piece 336 with the pole body 21. In addition, the perforation 902 operation of the tab 335, the connection operation of the tab 335 and the pole part 2 (which can also be omitted), and the connection operation of the pole part 2 and the shell part 1, are not easy to cause the connection position between the active material coating part 32 and the conductive part 33 to crack, thereby improving the reliability of the battery cell 102.

[0280] Please further refer to FIGS. 33 and 34, FIG. 33 is a structural exploded view of the conductive part 33 of the battery cell 102 shown in FIG. 30; and FIG. 34 is a partial structural schematic view of the conductive part 33 of the battery cell 102 shown in FIG. 30 in a straightened state. In some embodiments of the present application, the conductive piece 336 has a slot 3361, and the tab 335 is at least partially inserted into the slot 3361.

[0281] Specifically, the conductive member 336 can include a first connecting section 3362, the first connecting section 3362 including two clamping portions 3360, the two clamping portions 3360 defining a slot 3361 therebetween, and the tab 335 having one end away from the active material coated section 32 clamped between the two clamping portions 3360 and connected with the clamping portions 3360. In this way, the two clamping portions 3360 can be used to limit the one end of the tab 335 away from the active material coated section 32 (denoted as a tab end 3351), thereby improving the connection reliability of the tab 335 and the conductive member 336.

[0282] The tab end 3351 between the two clamping portions 3360 can be a structure in which the ends of the plurality of laminated tab pieces 311 are pre-connected together, thereby simplifying the processing procedure and improving the processing efficiency. Of course, the tab end 3351 between the two clamping portions 3360 can also be the ends of the plurality of laminated tab pieces 311, that is, before the tab 335 is connected with the conductive member 336, the ends of the plurality of laminated tab pieces 311 of the tab 335 are not pre-connected together by welding or other means.

[0283] Further, the conductive member 336 can also include a second connecting section 3363, the second connecting section 3363 directly connected with the pole body 21.

[0284] In the embodiments of the present application, the conductive member 36 includes a transition sheet, the transition sheet including a plurality of laminated and connected transition foil pieces, so that the transition sheet is deformable. The plurality of transition foil pieces can be made of the same material as the tab 335, and the plurality of transition foil pieces can be welded at several key positions by ultrasonic welding or the like, so that the plurality of transition foil pieces are connected together.

[0285] Since the plurality of transition foil pieces have a small thickness, the plurality of transition foil pieces are equivalent to multiple layers of thin plates, and the transition sheet formed by the plurality of transition foil pieces is more easily bent than an integrally formed transition sheet, so that the transition sheet and the tab 335 can be bent as needed, thereby making the conductive section 33 form a preset bent shape, and further meeting the design needs.

[0286] Please refer to Figs. 32-34 again, and further refer to Figs. 35-37, Fig. 35 is a schematic view of the structure of the electrode component 3 of the battery monomer 102 being installed into the shell component 1, Fig. 36 is a schematic view of the local structure of the conductive part 33 of the battery monomer 102 being connected with the pole component 2, and Fig. 37 is a schematic view of the local structure of the pole component 2 of the battery monomer 102 being connected with the shell component 1. In the embodiment in which the installation wall 111 is the wall body opposite to the shell cover 12 of the shell body 11, during assembly, the plurality of tab pieces 311 of the tab 335 can be shaped and gathered, and the adapter piece can be connected with the tab 335 to form the conductive part 33, then the active material coated part 32 with the conductive part 33 can be installed into the shell body 11, the shell cover 12 can be connected with the shell body 11, then the adapter piece extending out of the shell body 11 can be connected with the pole body 21 together, finally the pole component 2 can be rotated and fixed on the installation wall 111 of the shell component 1, after assembly, the conductive part 33 formed by the connection of the tab 335 and the adapter piece can be arranged in a substantially "S" shape.

[0287] Please refer to Fig. 38, which is a schematic view of the structure of the battery monomer 102 according to some other embodiments of the present application. In some other optional embodiments of the present application, the gathering section 331, the first extension section 332 and the second extension section 333 define a third open groove 3343, and the insulating piece at least partially extends into the third open groove 3343 to block between the second extension section 333 and the active material coated part 32.

[0288] Specifically, the second extension section 333 can be connected with the pole body 21 near the side of the active material coated part 32, so that the second extension section 333 is arranged opposite to the gathering section 331, and the insulating piece blocks between the second extension section 333 and the active material coated part 32, which can reduce the probability of the second extension section 333 being inserted into the interior of the active material coated part 32 and the gathering section 331 due to redundancy, thereby reducing the risk of short circuit of the battery monomer 102 and facilitating to improve the use reliability of the battery monomer 102.

[0289] Of course, the second extension section 333 can pass through the pole body 21 and be connected with the side of the pole body 21 away from the active material coated part 32, so that the pole body 21 is arranged opposite to the gathering section 331, and in this way, the pole body 21 blocks between the second extension section 333 and the active material coated part 32, and the insulating piece blocks between the pole body 21 and the active material coated part 32, so that the insulating piece blocks between the second extension section 333 and the active material coated part 32, thereby further reducing the risk of short circuit of the battery monomer 102 and facilitating to improve the use reliability of the battery monomer 102.

[0290] In some alternative embodiments of the present application, the pole body 21 has a through hole 210, the second extension section 333 is arranged in the through hole 210 and connected with the hole wall of the through hole 210, and the insulating member can be arranged between the pole body 21 and the active material coated portion 32, thereby reducing the risk of short circuit of the battery monomer 102 and improving the use reliability of the battery monomer 102.

[0291] Please refer to FIGS. 39-42, FIG. 39 is a schematic view of a pole component according to some embodiments of the present application; FIG. 40 is a top view of the pole component shown in FIG. 39; FIG. 41 is a view along the direction B shown in FIG. 40; and FIG. 42 is a sectional view along the line C-C shown in FIG. 40. In some embodiments of the present application, the pole component 2 includes a pole body 21, a transition structure 22 and an insulating structure 23, the transition structure 22 surrounds the pole body 21, the transition structure 22 is connected with the mounting wall 111, the insulating structure 23 is insulatingly fitted between the transition structure 22 and the pole body 21, and the electrode component 3 is connected with the pole body 21.

[0292] The transition structure 22 surrounds the pole body 21 along the circumference of the mounting hole 112, so that the transition structure 22 can connect the pole body 21 and the mounting wall 111 at the outer peripheral region of the pole body 21, and the insulating structure 23 insulates the fitting position of the transition structure 22 and the pole body 21, thereby preventing the pole body 21 and the transition structure 22 from being electrically short-circuited. The connection manner of the transition structure 22 and the mounting wall 111 is not limited, for example, the transition structure 22 can be welded, riveted, punched, bonded or the like to the mounting wall 111. In addition, the pole body 21 and the electrode component 3 can be connected through the conductive portion 33, and the connection manner of the conductive portion 33 and the pole body 21 is not limited, for example, the conductive portion 33 can be welded, riveted, punched, bonded or the like to the pole body 21.

[0293] In the above technical solution, the pole component 2 has a simple structure and is easy to process, and since the pole component 2 includes the pole body 21 and the transition structure 22, the shape and size of the pole body 21 and the shape and size of the transition structure 22 can be designed separately based on different factors, so as to flexibly adapt to the connection requirements of different forms of the housing component 1 and the electrode component 3, thereby increasing the application range of the pole component 2.

[0294] Exemplarily, the adapter structure 22 can be arranged to match the shape of the mounting hole 112, which can be designed as an elongated shape to facilitate the passage of the pole part 2 and to reduce the overturning angle of the pole part 2. Meanwhile, the pole body 21 can be designed as an elongated shape matching the shape of the adapter structure 22, so that the pole body 21 has a larger area connected with the conductive part 33, or the pole body 21 can be designed as a circular shape not matching the shape of the adapter structure 22, so as to facilitate reducing the connection area of the pole body 21 and the adapter structure 22, improving the force uniformity at the connection between the pole body 21 and the adapter structure 22, and thus improving the connection reliability of the pole body 21 and the adapter structure 22.

[0295] In some embodiments of the present application, the adapter structure 22 is formed as an elongated shape (e.g., a rectangular shape or a racetrack shape) extending along the length direction of the mounting wall 111, and the pole body 21 has a contour shape matching the contour shape of the adapter structure 22 (e.g., a rectangular shape or a racetrack shape). As described above, the electrode part 3 is connected with the pole part 2 through the conductive part 33. When the contour shape of the pole body 21 is formed as an elongated shape matching the contour shape of the adapter structure 22, the pole body 21 has a larger area, which is conducive to improving the connection area of the conductive part 33 and the pole body 21, and thus improving the conductivity.

[0296] Please refer to FIG. 39. In some other embodiments of the present application, the adapter structure 22 is formed as an elongated shape (e.g., a rectangular shape or a racetrack shape) extending along the length direction of the mounting wall 111, and the pole body 21 is arranged at the length center of the adapter structure 22 and has a circular shape. In this way, when the pole body 21 is arranged at the length center of the elongated adapter structure 22 and has a circular shape, the connection area of the pole body 21 and the adapter structure 22 can be reduced, the force uniformity at the connection between the pole body 21 and the adapter structure 22 can be improved, and thus the connection reliability of the pole body 21 and the adapter structure 22 can be improved.

[0297] Please refer to FIGS. 39-42. In some embodiments of the present application, the insulating structure 23 is also sealingly fitted between the adapter structure 22 and the pole body 21. In this way, the insulating structure 23 not only insulates the adapter structure 22 and the pole body 21, but also makes the fitting position of the adapter structure 22 and the pole body 21 in a sealed state, so as to isolate the inside and outside of the shell part 1 after the adapter structure 22 is connected with the mounting wall 111, reduce the risk of the electrolyte in the shell part 1 leaking from the fitting position of the adapter structure 22 and the pole body 21 to the outside of the shell part 1, and reduce the risk of liquid or dust outside the shell part 1 entering the shell part 1 from the fitting position of the adapter structure 22 and the pole body 21, thereby improving the reliability of the battery monomer 102.

[0298] In the above technical solution, since the insulating structure 23 is also sealingly fitted between the adapter structure 22 and the pole body 21, when the pole part 2 is installed to the installation wall 111, the adapter structure 22 and the installation wall 111 do not need to be provided with a sealing member or the like, and a large sealing pressure is not needed to meet the compression degree of the sealing member, thereby reducing the stress of the installation wall 111, protecting the housing part 1, and reducing the wall thickness of the housing part 1 and the material cost. Moreover, since the installation wall 111 is at the end of the housing body 11 opposite to the opening 113, the stress of the connection between the installation wall 111 and the peripheral wall 114 and the stress of the peripheral wall 114 can be reduced, thereby ensuring the reliability of the housing body 11 and reducing the wall thickness and cost of the housing body 11.

[0299] Please refer to FIGS. 39-42 again. In some embodiments of the present application, the insulating structure 23 includes a sealing structure 231. In embodiments of the present application, the sealing structure 231 is made of a material that has both sealing and insulating properties, for example, an elastic rubber member.

[0300] Please refer to FIGS. 39-42 again. For example, at least part of the sealing structure 231 is clamped between the adapter structure 22 and the pole body 21 in the inner-outer direction (for example, the fifth direction F5) of the installation wall 111.

[0301] In embodiments of the present application, the direction from the inner side of the installation wall 111 to the outer side of the installation wall 111 and the direction from the outer side of the installation wall 111 to the inner side of the installation wall 111 are collectively referred to as the “inner-outer direction (for example, the fifth direction F5) of the installation wall 111”. The “inner side of the installation wall 111” refers to the side of the installation wall 111 facing the electrode part 3, and the “outer side of the installation wall 111” refers to the side of the installation wall 111 away from the electrode part 3.

[0302] The sealing structure 231 at least includes a shaft side 231a. The side of the shaft side 231a facing the accommodating cavity 13 is the inner side of the shaft side 231a, and the side of the shaft side 231a away from the electrode part 3 is the outer side of the shaft side 231a. Part of one of the adapter structure 22 and the pole body 21 is clamped at the outer side of the shaft side 231a, and part of the other is clamped at the inner side of the shaft side 231a, so that the shaft side 231a is clamped between the adapter structure 22 and the pole body 21 in the inner-outer direction (for example, the fifth direction F5) of the installation wall 111, to achieve axial sealing between the adapter structure 22 and the pole body 21.

[0303] Thus, by arranging at least part of the sealing structure 231 to be clamped between the adapter structure 22 and the pole body 21 in the inner-outer direction (e.g., the fifth direction F5) of the mounting wall 111, axial sealing between the adapter structure 22 and the pole body 21 is achieved, and the axial sealing can achieve a more reliable sealing effect, improving the problem of leakage at the mating position of the adapter structure 22 and the pole body 21. Moreover, the embodiments of the present application can reduce the axial force on the mounting wall 111 by integrating the axial sealing (e.g., the shaft side 231a) into the pole component.

[0304] Please refer to FIGS. 39-42 again. Exemplarily, the sealing structure 231 is annularly arranged on the circumferential side of the adapter structure 22 facing the pole body 21 (i.e., the inner ring of the adapter structure 22). In the embodiments of the present application, since the adapter structure 22 is arranged around the pole body 21 and connected to the mounting wall 111, the circumferential side of the adapter structure 22 facing the pole body 21 is the “inner ring 2211 of the adapter structure 22”, and the circumferential side of the adapter structure 22 facing the mounting wall 111 is the “outer ring 2212 of the adapter structure 22”. In the above technical solution, by annularly arranging the sealing structure 231 on the inner ring of the adapter structure 22, the sealing structure 231 can approach the mating position of the adapter structure 22 and the pole body 21, which is conducive to sealing the mating position of the adapter structure 22 and the pole body 21 in a shorter path, improving the reliability of the sealing, and is also conducive to reducing the size of the sealing structure 231, reducing the sealing area, and easily realizing compression sealing, which is not easy to fail and improves the sealing effect.

[0305] In addition, when the insulation structure 23 includes the sealing structure 231 clamped between the adapter structure 22 and the pole body 21 to seal the mating of the adapter structure 22 and the pole body 21, and the adapter structure 22 is formed in a long strip shape extending along the length direction of the mounting wall 111, and the pole body 21 is arranged at the length center position of the adapter structure 22 and is circular, since the connection position of the adapter structure 22 and the pole body 21 is uniformly stressed, the compression amount of the sealing structure 231 can be easily controlled to improve the reliability of the sealing of the adapter structure 22 and the pole body 21, and the sealing area is relatively small and not easy to fail.

[0306] Please refer to FIGS. 39-42 again. In some embodiments of the present application, the pole body 21 includes a circumferential portion 212, and the adapter structure 22 is clamped on both sides of the circumferential portion 212 in the inner-outer direction of the mounting wall 111 by the insulation structure 23, and at least part of the sealing structure 231 is clamped between the side of the circumferential portion 212 facing the electrode component 3 and the adapter structure 22.

[0307] In the embodiment, the peripheral portion 212 can be an outer peripheral structure of the pole body 21, and since the sealing structure 231 is annularly arranged on the peripheral side of the adapter structure 22 facing the pole body 21, the sealing structure 231 can be clamped between the peripheral portion 212 and the adapter structure 22.

[0308] In the embodiment, the side of the peripheral portion 212 away from the electrode component 3 is the outer side of the peripheral portion 212, and the side of the peripheral portion 212 facing the accommodating cavity 13 is the inner side of the peripheral portion 212. The adapter structure 22 is limited by the insulating structure 23 on the outer side of the peripheral portion 212 to limit the movement of the pole body 21 relative to the adapter structure 22 in the direction away from the electrode component 3, and the adapter structure 22 is also limited by the insulating structure 23 on the inner side of the peripheral portion 212 to limit the movement of the pole body 21 relative to the adapter structure 22 in the direction facing the accommodating cavity 13, so that the adapter structure 22 is clamped on both sides of the peripheral portion 212 in the inner and outer directions (for example, the fifth direction F5) of the mounting wall 111 by the insulating structure 23.

[0309] In the above technical solution, the pole component 2 has a simple structure and is easy to process, and the relative fixation and insulating cooperation of the pole body 21 and the adapter structure 22 can be simply and effectively achieved. The peripheral portion 212 of the pole body 21 and the adapter structure 22 clamp the sealing structure 231, so that the sealing structure 231 can be in the cooperation position of the adapter structure 22 and the pole body 21, which is conducive to sealing the cooperation position of the adapter structure 22 and the pole body 21 in a shorter path, improving the reliability of the sealing, and is conducive to reducing the size of the sealing structure 231, reducing the sealing area, easily realizing compression sealing, and improving the sealing effect. Moreover, since at least part of the sealing structure 231 is clamped between the side of the peripheral portion 212 facing the electrode component 3 and the adapter structure 22, the sealing structure 231 can be sealed from the side of the peripheral portion 212 facing the accommodating cavity 13, which can more effectively prevent the electrolyte from leaking from the cooperation position of the pole body 21 and the adapter structure 22, thereby improving the sealing effect.

[0310] Please refer to Fig. 42 again. Exemplarily, the insulating structure 23 further includes a first insulating member 232, and the adapter structure 22 is clamped on both sides of the peripheral portion 212 in the inner and outer directions (for example, the fifth direction F5) of the mounting wall 111 by the first insulating member 232 and the sealing structure 231. In the embodiment, the adapter structure 22 is not limited in structure, and can be a single part or a combination of multiple parts (such as two or more).

[0311] Since at least part (such as the shaft side 231a) of the sealing structure 231 is arranged on the side of the peripheral portion 212 facing the electrode component 3, at least part of the first insulation 232 is arranged on the side of the peripheral portion 212 away from the electrode component 3, and the adapter structure 22 can be clamped on both sides of the peripheral portion 212 along the inner and outer directions (for example, the fifth direction F5) of the mounting wall 111 through the first insulation 232 and the sealing structure 231 respectively.

[0312] In the above technical solution, since the insulation structure 23 includes the first insulation 232 and the sealing structure 231 which are not integrated into one piece, the design and processing of the insulation structure 23 can be simplified. Moreover, according to the specific cooperation requirements of the pole body 21 and the adapter structure 22, the first insulation 232 can be set as an insulation piece (such as a plastic piece) which is substantially incompressible and does not have sealing effect, or the first insulation 232 can also be set as a sealing piece (such as an elastic rubber piece) which is compressible and has sealing effect, so as to meet different actual requirements. In addition, when the first insulation 232 is an insulation piece (such as a plastic piece) which is substantially incompressible and does not have sealing effect, the compression amount of the sealing structure 231 can be easily controlled, and the sealing effect is improved.

[0313] Alternatively, in some other embodiments of the present application, the sealing structure 231 can also be an integral structure and wrap the peripheral portion 212 to be respectively located on the side of the peripheral portion 212 facing the electrode component 3 and the side of the peripheral portion 212 away from the electrode component 3, and the adapter structure 22 can be clamped on both sides of the peripheral portion 212 along the inner and outer directions (for example, the fifth direction F5) of the mounting wall 111 through the sealing structure 231. That is, the sealing structure 231 is an integral annular structure, that is, it has insulation and sealing properties, and the sealing structure 231 includes the shaft side 231a located on both sides of the peripheral portion 212. In this way, the adapter structure 22 can be clamped on both sides of the peripheral portion 212 along the inner and outer directions (for example, the fifth direction F5) of the mounting wall 111 through the two shaft sides 231a of the sealing structure 231. In the above technical solution, since the sealing structure 231 is an integral structure and wraps the peripheral portion 212, the number of parts can be reduced, and the assembly process is reduced.

[0314] Please refer to FIGS. 39-42 again. In some embodiments of the present application, the adapter structure 22 includes a first adapter ring 221 and a second adapter ring 222, the second adapter ring 222 is arranged on the side of the first adapter ring 221 away from the electrode component 3, the second adapter ring 222 is connected with the first adapter ring 221, and the first adapter ring 221 is connected with the mounting wall 111. The sealing structure 231 is clamped between the first adapter ring 221 and the peripheral portion 212, and the second adapter ring 222 is insulated and fixedly connected with the peripheral portion 212 through the first insulation 232.

[0315] For example, the first adapter ring 221 and the second adapter ring 222 can be welded, riveted, punched, bonded, or the like, for example, the outer ring of one of the first adapter ring 221 and the second adapter ring 222 is welded, riveted, punched, bonded, or the like, to the mounting wall 111. Exemplarily, the first adapter ring 221 and the second adapter ring 222 are both made of aluminum and are welded, the first adapter ring 221 and the mounting wall 111 are both made of aluminum and are welded, thereby facilitating improvement of the welding yield.

[0316] Thus, the adapter structure 22 includes the first adapter ring 221 and the second adapter ring 222 which are disposed inside and outside and assembled, thereby facilitating assembly of the adapter structure 22 with the insulating structure 23 and the pole body 21, making the pole part 2 easy to manufacture and control the compression amount of the sealing structure 231, improving the sealing reliability.

[0317] For example, the first insulating member 232 and the second adapter ring 222 can be injection-molded, respectively. For another example, refer to FIG. 43, which is a cross-sectional view of a pole part according to some embodiments of the present application; the second adapter ring 222 can include a stop ring portion 2221, and at least part of the first insulating member 232 is clamped between the stop ring portion 2221 and the peripheral portion 212 in the inside-outside direction (for example, the fifth direction F5) of the mounting wall 111, wherein the material of the first insulating member 232 is not limited, for example, it can be a plastic member or an elastic rubber member, etc.

[0318] For example, the first insulating member 232 and the second adapter ring 222 can be injection-molded, respectively. For another example, refer to FIG. 43, which is a cross-sectional view of a pole part according to some embodiments of the present application; the second adapter ring 222 can include a stop ring portion 2221, and at least part of the first insulating member 232 is clamped between the stop ring portion 2221 and the peripheral portion 212 in the inside-outside direction (for example, the fifth direction F5) of the mounting wall 111, wherein the material of the first insulating member 232 is not limited, for example, it can be a plastic member or an elastic rubber member, etc.

[0319] For example, the first insulating member 232 and the second adapter ring 222 can be injection-molded, respectively. For another example, refer to FIG. 43, which is a cross-sectional view of a pole part according to some embodiments of the present application; the second adapter ring 222 can include a stop ring portion 2221, and at least part of the first insulating member 232 is clamped between the stop ring portion 2221 and the peripheral portion 212 in the inside-outside direction (for example, the fifth direction F5) of the mounting wall 111, wherein the material of the first insulating member 232 is not limited, for example, it can be a plastic member or an elastic rubber member, etc.

[0320] The end of the inner extension 2231 facing the pole body 21 (i.e., the inner ring of the inner extension 2231) and the end of the outer extension 2232 facing the pole body 21 (i.e., the inner ring of the outer extension 2232) are spaced apart in the inner-outer direction, so as to be clamped on both sides of the peripheral portion 212 in the inner-outer direction (e.g., the fifth direction F5) of the mounting wall 111 by the insulation structure 23. The sealing structure 231 is clamped between the inner extension 2231 and the peripheral portion 212, and the outer extension 2232 is insulated and fixedly fitted with the peripheral portion 212 by the first insulation member 232.

[0321] The connection manner of the third adapter ring 223 with the mounting wall 111 is not limited, for example, can be welding, riveting, punching, bonding, etc. Illustratively, the third adapter ring 223 and the mounting wall 111 are both made of aluminum and are connected by welding, thereby facilitating improvement of the welding yield.

[0322] The manner in which the outer extension 2232 is insulated and fixedly fitted with the peripheral portion 212 by the first insulation member 232 is not limited. For example, referring again to FIG. 44, the outer extension 2232 is riveted against the peripheral portion 212 with the first insulation member 232. For another example, referring to FIG. 45, which is a cross-sectional view of a pole part provided in some embodiments of the application, the first insulation member 232 is injection-molded between the pole body 21 and the outer extension 2232, and between the first insulation member 232 and the outer extension 2232, respectively, and the inner extension 2231 is riveted against the peripheral portion 212 with the sealing structure 231.

[0323] Illustratively, referring again to FIG. 45, the adapter structure 22 further includes a second insulation bracket 225 connected to one side of the third adapter ring 223 facing the electrode part 3. In this way, the second insulation bracket 225 can play an insulating role between the electrode part 3 and the third adapter ring 223, and the insulation structure provided here is omitted. Illustratively, the second insulation bracket 225 has a plug, and the third adapter ring 223 has a socket, and the plug is inserted into the socket in an interference fit, so as to connect the second insulation bracket 225 with the third adapter ring 223.

[0324] Referring to FIG. 46 and FIG. 47, FIG. 46 is a cross-sectional view of a battery monomer 102 provided in some embodiments of the application; and FIG. 47 is a cross-sectional view of a battery monomer 102 provided in some embodiments of the application. In some embodiments of the application, the adapter structure 22 includes a fitting ring portion 2271, the pole body 21 includes a penetrating portion 214 penetrating the fitting ring portion 2271, and an inner limiting portion 215 and an outer limiting portion 216 connected to the penetrating portion 214 and clamped on the inner and outer sides of the fitting ring portion 2271, and at least part of the sealing structure 231 is clamped between the fitting ring portion 2271 and the inner limiting portion 215.

[0325] Exemplarily, the adapter structure 22 comprises a fourth adapter ring 227, the fourth adapter ring 227 comprises a matching ring part 2271, and the fourth adapter ring 227 is connected with the mounting wall 111, for example, the outer ring of the fourth adapter ring 227 is connected with the mounting wall 111. The connection mode of the fourth adapter ring 227 with the mounting wall 111 is not limited, for example, it can be welded, riveted, punched, bonded, etc. Exemplarily, the fourth adapter ring 227 and the mounting wall 111 are both aluminum materials and are welded, thereby facilitating the improvement of the welding yield.

[0326] In the above technical solution, the pole column component 2 has a simple structure and is easy to process, and the relative fixation and insulation cooperation of the pole column body 21 and the adapter structure 22 can be simply and effectively realized. The sealing structure 231 is clamped by the cooperation position of the pole column body 21 and the matching ring part 2271, so that the sealing structure 231 can be at the cooperation position of the adapter structure 22 and the pole column body 21, which is beneficial to sealing the cooperation position of the adapter structure 22 and the pole column body 21 in a shorter path, improving the reliability of sealing, and is also beneficial to reducing the size of the sealing structure 231, reducing the sealing area, easily realizing compression sealing, and improving the sealing effect. Moreover, since at least part of the sealing structure 231 is clamped between the matching ring part 2271 and the inner limiting part 215, the sealing structure 231 can be sealed from the side of the matching ring part 2271 facing the accommodating cavity 13, and the leakage of electrolyte from the cooperation position of the pole column body 21 and the adapter structure 22 can be more effectively inhibited, thereby improving the sealing effect.

[0327] Please refer to Fig. 46 again, the insulation structure 23 can further comprise a second insulation part 234, wherein at least part of the sealing structure 231 is clamped between the inner limiting part 215 and the matching ring part 2271, and at least part of the second insulation part 234 is clamped between the outer limiting part 216 and the matching ring part 2271.

[0328] In the above technical solution, since the insulation structure 23 comprises the second insulation part 234 and the sealing structure 231 which are not integrated as one piece, the design and processing of the insulation structure 23 can be simplified. Moreover, according to the specific cooperation requirements of the pole column body 21 and the adapter structure 22, the second insulation part 234 can be set as an insulation part (for example, a plastic part) which is basically incompressible and does not have sealing effect, or the second insulation part 234 can also be set as a sealing part (for example, an elastic rubber part) which is compressible and has sealing effect, thereby meeting different actual requirements. In addition, when the second insulation part 234 is an insulation part (for example, a plastic part) which is basically incompressible and does not have sealing effect, the compression amount of the sealing structure 231 can be easily controlled, thereby improving the sealing effect.

[0329] Alternatively, please refer to Fig. 47; in some other embodiments of the present application, the sealing structure 231 can also be an integral structure and surround the fitting ring portion 2271, so as to be respectively located on the side of the fitting ring portion 2271 facing the electrode component 3 and the side of the fitting ring portion 2271 facing away from the electrode component 3, and the pole body 21 is clamped on both sides of the fitting ring portion 2271 along the inner-outer direction (for example, the fifth direction F5) of the mounting wall 111 by the sealing structure 231. That is, the sealing structure 231 is an integral annular structure, that is, it has insulation and sealing properties, and the sealing structure 231 includes shaft side portions 231a respectively located on the inner and outer sides of the fitting ring portion 2271, so that the adapter structure 22 can be clamped on both sides of the fitting ring portion 2271 along the inner-outer direction (for example, the fifth direction F5) of the mounting wall 111 by the two shaft side portions 231a of the sealing structure 231. In the above technical solution, since the sealing structure 231 is an integral structure and surrounds the fitting ring portion 2271, the number of parts can be reduced and the assembly process can be reduced.

[0330] In the embodiments of the present application, when the pole body 21 includes the penetrating portion 214, and the inner limiting portion 215 and the outer limiting portion 216 connected with the penetrating portion 214 and clamped on both sides of the fitting ring portion 2271, the pole body 21 is not limited in structure and can be a single part or a combination of multiple parts (such as two or more).

[0331] Exemplarily, please refer to Fig. 46 again, the outer limiting portion 216 is assembled and connected with the penetrating portion 214 on the side of the fitting ring portion 2271 facing away from the inner limiting portion 215. The assembled and connected manner of the outer limiting portion 216 and the penetrating portion 214 is not limited, for example, welding, punching, adhesive connection, etc., and the assembled and connected means that two parts are connected together through a connection process. Therefore, the outer limiting portion 216 and the penetrating portion 214 are provided as separate parts and are assembled and connected, so that the structure of the pole body 21 is simple and easy to assemble and connect with the adapter structure 22. In addition, when the outer limiting portion 216 and the penetrating portion 214 are welded, the heat effect on the sealing structure 231 clamped between the inner limiting portion 215 and the fitting ring portion 227 can be reduced, and the sealing reliability of the sealing structure 231 can be improved.

[0332] In the above embodiment, the connection mode of the penetrating portion 214 and the inner limiting portion 215 is not limited, and the penetrating portion 214 and the inner limiting portion 215 can be an integral piece or separate pieces and are connected in advance. For example, the end of the penetrating portion 214 away from the inner limiting portion 215 can include a riveting portion 2141. During assembly, the penetrating portion 214 can be penetrated and fitted along the direction from the inner limiting portion 215 to the outer limiting portion 216 to the fitting ring portion 2271 of the insulation structure 23, and then the riveting portion 2141 is riveted to limit the penetrating portion 214 from being pulled out along the direction from the outer limiting portion 216 to the inner limiting portion 215. Then, the riveting portion 2141 and the outer limiting portion 216 can be connected, for example, welded, to facilitate the connection of the penetrating portion 214 and the outer limiting portion 216. Alternatively, the riveting portion 2141 can be omitted, and the riveting process after the penetrating portion 214 is penetrated can be omitted.

[0333] the riveting process after the penetrating portion 214 is penetrated can be omitted.

[0334] For example, please refer to FIG. 47 again; in some other embodiments of the present application, the outer limiting portion 216 and the penetrating portion 214 are an integral piece, and the outer limiting portion 216 rivets the second insulation piece 234 against the fitting ring portion 2271. In the above technical solution, the assembly and connection of the outer limiting portion 216, the insulation structure 23, and the adapter structure 22 are achieved by riveting, which reduces the heat generated when the outer limiting portion 216 is connected with the insulation structure 23 and the adapter structure 22, and improves the sealing reliability of the sealing structure piece 231. In addition, the second insulation piece 234 is pressed against the fitting ring portion 2271 by riveting of the outer limiting portion 216, which easily controls the compression amount of the sealing structure piece 231 and achieves a better compression effect.

[0335] In the above embodiment, the connection mode of the penetrating portion 214 and the inner limiting portion 215 is not limited, and the penetrating portion 214 and the inner limiting portion 215 can be an integral piece or separate pieces and are connected in advance. For example, during assembly, the penetrating portion 214 can be penetrated and fitted along the direction from the inner limiting portion 215 to the outer limiting portion 216 to the fitting ring portion 2271 of the insulation structure 23, and then the outer limiting portion 216 is riveted to limit the relative movement of the pole piece 21 and the adapter structure 22.

[0336] The pole body 21 can be a solid structure or a hollow structure. When the pole body 21 is a hollow structure, refer to FIG. 47 for an example. The pole body 21 includes a first pole part 21a and a second pole part 21b. The second pole part 21b includes a through part 214, an inner limiting part 215, and an outer limiting part 216, and is installed on the mounting wall 111. The through part 214 surrounds a matching hole 21b1 penetrating in the inner-outer direction of the mounting wall 111. The first pole part 21a is assembled on the side of the second pole part 21b away from the electrode part 3 and covers the matching hole 21b1, so as to form a containing space open in the direction towards the electrode part 3 between the first pole part 21a and the second pole part 21b. Part of the conductive part 33 can extend into the containing space and be connected to the first pole part 21a. Thus, the pole body 21 can serve to accommodate the conductive part 33, so as to reduce the space occupation of the conductive part 33 in the containing cavity 13, and facilitate to improve the energy density of the battery monomer 102.

[0337] Again refer to FIG. 46. In some embodiments of the present application, the adapter structure 22 further includes a third insulating frame 228 connected to the side of the fourth adapter ring 227 facing the electrode part 3. Thus, the third insulating frame 228 can serve to insulate between the electrode part 3 and the fourth adapter ring 227, and the insulating structure is not needed to be arranged here. For an example, the third insulating frame 228 has a latch, and the fourth adapter ring 227 has a socket. The latch is inserted into the socket in interference fit, so as to connect the third insulating frame 228 and the fourth adapter ring 227.

[0338] Refer to FIG. 48, which is a sectional view of the battery monomer 102 provided in some embodiments of the present application. In some embodiments of the present application, the mounting wall 111 has a mounting hole 112, and a sealing ring 14 is arranged around the mounting hole 112. The sealing ring 14 is clamped between the pole part 2 and the mounting wall 111. Thus, the pole part 2 has a simple structure, is easy to process, and is easy to assemble with the mounting wall 111.

[0339] In some embodiments of the present application, the mounting wall 111 has a mounting hole 112, and the pole part 2 covers the mounting hole 112. The edge of the adapter structure 22 is overlapped on one side of the mounting wall 111 in the wall thickness direction. Thus, the adapter structure 22 is covered on one side of the mounting wall 111 in the wall thickness direction, i.e. the adapter structure 22 is covered on the outer side of the mounting wall 111 or the inner side of the mounting wall 111, so as to facilitate the assembly of the adapter structure 22 and the mounting wall 111.

[0340] Exemplarily, the adapter structure 22 is welded to the mounting wall 111. For example, after the adapter structure 22 is covered on the mounting wall 111, the adapter structure 22 and the mounting wall 111 can be connected by welding, so as to facilitate the processing and to better ensure the connection reliability of the adapter structure 22 and the mounting wall 111. For example, the welding can be performed from the outside of the mounting wall 111, so that the welding seam formed by the connection of the adapter structure 22 and the mounting wall 111 is exposed on the side of the mounting wall 111 away from the electrode component 3 (i.e., the side away from the active material coating portion 32), thereby facilitating the welding operation and increasing the welding space. The present application is not limited thereto, and for example, in some other embodiments of the present application, the adapter structure 22 can also be arranged to penetrate the mounting hole 112 and be riveted to the mounting wall 111, and the like.

[0341] Please refer to FIG. 49 and FIG. 50, FIG. 49 is a partial cross-sectional view of the battery monomer 102 provided by some embodiments of the present application, in which the pole component 2 is in a state before being covered on the mounting wall 111; and FIG. 50 is a state diagram of the pole component 2 shown in FIG. 49 after being covered on the mounting wall 111.

[0342] Please refer to FIG. 49 and FIG. 50, in some embodiments, when the connection of the electrode component 3 and the pole component 2 is performed first, and then the pole component 2 is assembled and connected to the mounting wall 111, the pole component 2 can be covered on the mounting hole 112 of the mounting wall 111 from the outside of the mounting wall 111 (i.e., the side away from the active material coating portion 32) after the connection of the electrode component 3 and the pole component 2 (for example, the pole component 2 and the electrode component 3 can be connected first, and then assembled into the shell body 11 together, and then the pole component 2 is stretched out to the outside of the mounting wall 111 from the mounting hole 112; or for example, the electrode component 3 is assembled into the shell body 11, the conductive portion 33 is penetrated through the mounting hole 112 and connected to the pole component 2 previously arranged on the outside of the mounting wall 111), and at this time, the edge of the adapter structure 22 is overlapped on the side of the mounting wall 111 away from the electrode component 3. Thus, since the pole component 2 is covered on the mounting wall 111 from the outside, the assembly and connection of the pole component 2 and the mounting wall 111 are facilitated, and the connection reliability of the pole component 2 and the mounting wall 111 is improved.

[0343] Please refer to FIG. 49 and FIG. 50, in some embodiments of the present application, when the edge of the adapter structure 22 overlaps the side of the mounting wall 111 away from the electrode component 3, the mounting wall 111 can be provided with a first recessed groove 1111 arranged around the mounting hole 112, the first recessed groove 1111 is open towards the direction away from the electrode component 3 (i.e. the first recessed groove 1111 is open towards the direction away from the active material coating part 32), the edge of the adapter structure 22 is embedded in the first recessed groove 1111, wherein the edge of the adapter structure 22 has a flange part 22a around the adapter structure 22, the flange part 22a is embedded in the first recessed groove 1111. Thus, it is convenient to support and position the connection between the adapter structure 22 and the mounting wall 111, which is conducive to the welding connection of the two from the outside of the mounting wall 111 (i.e. the side away from the active material coating part 32).

[0344] Please refer to FIG. 49 and FIG. 50 again, for example, the thickness of the flange part 22a matches the groove depth T1 of the first recessed groove 1111, wherein "match" means that the thickness of the flange part 22a is basically consistent with the groove depth of the first recessed groove 1111. Thus, it is convenient to weld the flange part 22a and the mounting wall 111, the thickness of the flange part 22a is not too large relative to the groove depth of the first recessed groove 1111, which can reduce unnecessary occupation of space, and the thickness of the flange part 22a is not too small relative to the groove depth of the first recessed groove 1111, which can meet the welding strength requirement.

[0345] In combination with FIGS. 49-51, FIG. 51 is an exploded view of a partial structure of the battery cell 102 according to some embodiments of the present application. In some embodiments of the present application, the mounting hole 112 is a long hole (e.g., rectangular, oval, or racetrack-shaped, etc.), and the pole piece 2 is formed as a long structure (e.g., rectangular, oval, or racetrack-shaped, etc.) matching the shape of the mounting hole 112. When the connection of the electrode piece 3 and the pole piece 2 is performed first, and then the pole piece 2 is assembled and connected to the mounting wall 111 together with the electrode piece 3, and then the pole piece 2 is flipped from the outside of the mounting wall 111 to cover the mounting hole 112, and then the connection of the pole piece 2 and the mounting wall 111 is performed, if the pole piece 2 is set as a long structure matching the shape of the mounting hole 112, the pole piece 2 can be adjusted to pass through the mounting hole 112 at an angle where the thickness direction of the pole piece 2 is close to the width direction (e.g., the second direction F2 shown in FIG. 51) of the mounting hole 112, and then the thickness direction of the pole piece 2 is rotated to be close to the thickness direction (e.g., the first direction F1 shown in FIG. 51) of the mounting wall 111 after the pole piece 2 passes through the mounting hole 112. In this way, the space required for the flipping movement of the pole piece 2 is small, the space required for the flipping of the pole piece 2 can be reduced, and thus the length of the conductive part 33 can be shortened, the material can be saved, the cost can be reduced, the redundancy of the conductive part 33 can be reduced, the space occupation of the conductive part 33 in the accommodation cavity 13 can be reduced, and the energy density of the battery cell 102 can be improved.

[0346] Please refer to FIGS. 52 and 53, FIG. 52 is a partial cross-sectional view of the battery cell 102 according to some embodiments of the present application, in which the pole piece 2 is in a state before covering the mounting wall 111; and FIG. 53 is a state diagram of the pole piece 2 covering the mounting wall 111 after the state shown in FIG. 52.

[0347] Please refer to FIGS. 52 and 53. In some embodiments, when the connection of the electrode piece 3 and the pole piece 2 is performed first, and then the pole piece 2 is assembled and connected to the mounting wall 111, the electrode piece 3 and the pole piece 2 can be assembled into the shell body 11 together after the connection of the electrode piece 3 and the pole piece 2. In this way, the pole piece 2 can be covered at the mounting hole 112 of the mounting wall 111 from the inside of the mounting wall 111 (i.e., from the side facing the active material coating part 32), and at this time, the edge of the adapter structure 22 is overlapped on the side of the mounting wall 111 facing the electrode piece 3. Therefore, since the pole piece 2 is arranged at the mounting hole 112 from the inside of the mounting wall 111, the electrode piece 3 and the pole piece 2 can be assembled into the shell body 11 together, and the pole piece 2 does not need to pass through the mounting hole 112, thereby reducing the operation steps and the operation difficulty.

[0348] Please refer to FIG. 52 and FIG. 53, in some embodiments of the present application, when the edge of the adapter structure 22 overlaps the side of the mounting wall 111 facing the electrode component 3, the edge of the adapter structure 22 has a second groove 22b that is open in a direction away from the electrode component 3 (i.e., the second groove 22b is open in a direction away from the active material coated portion 32), and the mounting wall 111 includes an overlapping portion 1112 protruding into the mounting hole 112, and the overlapping portion 1112 is embedded in the second groove 22b. Thus, it is convenient to support and position the connection of the pole component 2 and the mounting wall 111, and it is beneficial to weld them from the outside of the mounting wall 111 (i.e., the side away from the active material coated portion 32).

[0349] Please refer to FIG. 52 and FIG. 53 again, for example, the thickness of the overlapping portion 1112 matches the groove depth T2 of the second groove 22b, where "match" means that the thickness of the overlapping portion 1112 is basically the same as the groove depth of the second groove 22b. Thus, it is convenient to weld the overlapping portion 1112 and the mounting wall 111, and the thickness of the overlapping portion 1112 is not too large relative to the groove depth of the second groove 22b, which can reduce unnecessary occupation of space, and the thickness of the overlapping portion 1112 is not too small relative to the groove depth of the second groove 22b, which can meet the welding strength requirement.

[0350] In some embodiments of the present application, please refer to FIG. 5 again, the pole component 2 encloses a first accommodating groove 201 that is recessed in a direction away from the electrode component 3 relative to the mounting wall 111 and is open in a direction toward the electrode component 3, and the electrode component 3 is connected to the pole component 2 through the conductive portion 33, and at least part of the conductive portion 33 is accommodated in the first accommodating groove 201 and connected to the pole body 21. That is, the pole component 2 encloses the first accommodating groove 201, the groove wall of the first accommodating groove 201 is formed by the pole component 2, the first accommodating groove 201 is recessed in a direction away from the active material coated portion 32, and the first accommodating groove 201 is open in a direction toward the active material coated portion 32, so that the first accommodating groove 201 communicates with the accommodating cavity 13.

[0351] Thus, by providing the first accommodating groove 201 to accommodate the conductive portion 33, the space of the conductive portion 33 in the accommodating cavity 13 can be reduced, so that the accommodating cavity 13 has more space to accommodate the active material coated portion 32, which is beneficial to increase the volume of the active material coated portion 32, thereby increasing the energy density of the battery monomer 102. Moreover, since the first accommodating groove 201 is open in a direction toward the electrode component 13, the conductive portion 33 can easily extend into the first accommodating groove 201, reducing the operation difficulty.

[0352] Exemplarily, referring to Fig. 5 again, the first accommodating groove 201 is formed on the side of the pole body 21 and the adapter structure 22 facing the electrode component 3 (i.e. the side facing the active material coated part 32), and the adapter structure 22 is raised relative to the mounting wall 111 in a direction away from the electrode component 3 (i.e. in a direction away from the active material coated part 32), so that the first accommodating groove 201 is recessed relative to the mounting wall 111 in a direction away from the electrode component 3.

[0353] In this way, by machining the adapter structure 22 into a raised form protruding outward, a part of the first accommodating groove 201 is formed on the side of the pole body 21 facing the electrode component 3, and another part of the first accommodating groove 201 is formed on the side of the adapter structure 22 facing the electrode component 3, and the first accommodating groove 201 presents a shape recessed relative to the mounting wall 111 in a direction away from the electrode component 3, so that the side of the pole body 21 facing the electrode component 3 and the side of the adapter structure 22 facing the electrode component 3 both have the space first accommodating groove 201, which not only facilitates the accommodation of the conductive part 33 to a greater extent, but also facilitates the form diversity design of the conductive part 33.

[0354] In other embodiments of the present application, in combination with Fig. 45, when the adapter structure 22 is not raised relative to the mounting wall 111 in a direction away from the electrode component 3 (i.e. in a direction away from the active material coated part 32), the first accommodating groove 201 recessed relative to the mounting wall 111 in a direction away from the electrode component 3 can also be defined by the height difference between the adapter structure 22 and the pole body 21.

[0355] In some embodiments of the present application, referring to Fig. 5 again, the surface of the end of the pole body 21 facing the electrode component 3 is the inner end surface 211 of the pole body 21, and the inner end surface 211 of the pole body 21 participates in enclosing the first accommodating groove 201, and the conductive part 33 is connected to the inner end surface 211 of the pole body 21. That is, at least part of the inner end surface 211 of the pole body 21 participates in defining the groove wall of the first accommodating groove 201, and the conductive part 33 is connected to the part of the inner end surface 211 of the pole body 21 serving as the groove wall of the first accommodating groove 201. In the above technical solution, at least part of the first accommodating groove 201 is enclosed by the side surface of the pole body 21 facing the electrode component 3, and the conductive part 33 accommodated in the first accommodating groove 201 can easily contact and connect to the pole body 21, improving the connection convenience and simplifying the structure.

[0356] Exemplarily, when at least part of the conductive part 33 is accommodated in the first accommodating groove 201, the pole connecting part (e.g. the gathering part 313 of the tab 335 or the second connecting section 3363 of the conductive piece 336) of the conductive part 33 (e.g. the tab 335 or the conductive piece 336) can be laid on the inner end face 211 of the pole body 21 and connected with the inner end face 211 of the pole body 21. During processing, the pole connecting part of the conductive part 33 can be first loaded into the first accommodating groove 201, and then laid on the inner end face 211 of the pole body 21 and connected with the inner end face 211 of the pole body 21.

[0357] Exemplarily, the conductive part 33 can include a pole connecting part, which can be a relatively hard plate shape, such as the gathering part 313 of the tab 335 (e.g. an ultrasonic welding mark) or the second connecting section 3363 (e.g. a metal sheet) or the first conductive section 3365 (e.g. a metal sheet) of the conductive piece 336, which will not be deformed downward under the action of gravity.

[0358] Exemplarily, referring to FIG. 5, no matter whether the adapter structure 22 is raised relative to the mounting wall 111 in a direction away from the electrode component 3, the position of the inner end face 220 of the adapter structure 22 adjacent to the pole body 21 is a surrounding area 2201 surrounding the pole body 21, and the surrounding area 2201 is flush with the inner end face 211 of the pole body 21. Wherein, the inner end face 220 of the adapter structure 22 can be a planar structure, or a non-planar structure, such as a raised shape, and the most pole body 21 facing circle of the inner end face 220 of the adapter structure 22 is the surrounding area 2201.

[0359] Exemplarily, when the inner end face 211 of the pole body 21 is set to be larger (e.g. the adapter structure 22 is formed in a long strip shape extending along the length direction of the mounting wall 111, and the contour shape of the pole body 21 matches the contour shape of the adapter structure 22), and when the surrounding area 2201 is flush with the inner end face 211 of the pole body 21, the pole connecting part (e.g. the gathering part 313 of the tab 335 or the second connecting section 3363 of the conductive piece 336) of the conductive part 33 can be completely laid on the inner end face 211 of the pole body 21.

[0360] Exemplarily, in combination with FIGS. 39 and 43, when the inner end surface 211 of the pole body 21 is small (for example, the adapter structure 22 is provided in a long strip shape extending along the length direction of the mounting wall 111, and the pole body 21 is arranged in the center of the adapter structure 22 and has a circular profile), and when the surrounding area 2201 is flush with the inner end surface 211 of the pole body 21, a part of the pole connecting portion (for example, the folding portion 313 of the tab 335 or the second connecting segment 3363 of the conductive member 336) of the conductive portion 33 can be laid on the inner end surface 211 of the pole body 21, and the remaining part can be laid on the surrounding area 2201, so that the pole connecting portion (for example, in the case where the pole connecting portion is also in a long strip shape) of the conductive portion 33 as a whole can be supported, facilitating the pressing of the welding nozzle, so that the conductive portion 33 can be reliably connected with the pole body 21.

[0361] Exemplarily, the conductive portion 33 can include a pole connecting portion, which can be a relatively hard plate shape, for example, not deformed downward under the action of gravity, for example, the folding portion 313 of the tab 335 or the second connecting segment 3363 of the conductive member 336.

[0362] Exemplarily, referring to FIG. 44, regardless of whether the adapter structure 22 is raised relative to the mounting wall 111 in a direction away from the electrode component 3, the position of the inner end surface 220 of the adapter structure 22 adjacent to the pole body 21 is the surrounding area 2201 surrounding the pole body 21, and the inner end surface 211 of the pole body 21 protrudes from the surrounding area 2201 in a direction toward the electrode component 3. Among them, the inner end surface 220 of the adapter structure 22 can be a planar structure, or a non-planar structure, for example, a raised shape, and the inner end surface 220 of the adapter structure 22 closest to the pole body 21 is the surrounding area 2201.

[0363] Therefore, by arranging the inner end surface 211 of the pole body 21 to protrude from the surrounding area 2201 in a direction toward the electrode component 3, the pole body 21 can be inwardly retracted in the direction of the accommodation cavity 13 when the height of the pole body 21 is constant, so as to reduce the space occupied by the pole component 2 outside the shell component 1, and reduce the size of the battery monomer 102 in the direction in which the pole component 2 is arranged (for example, the first direction F1 shown in FIG. 3).

[0364] Exemplarily, when the inner end surface 211 of the pole body 21 is set to be large (for example, the adapter structure 22 is formed in a long strip shape extending along the length direction of the mounting wall 111, and the contour shape of the pole body 21 matches the contour shape of the adapter structure 22), and when the inner end surface 211 of the pole body 21 protrudes from the surrounding area 2201 towards the direction of the electrode component 3, the pole connecting part of the conductive part 33 (for example, the folding part 313 of the tab 335, or the second connecting segment 3363 of the conductive member 336) can be all laid on the inner end surface 211 of the pole body 21.

[0365] Exemplarily, in combination with FIG. 44, when the inner end surface 211 of the pole body 21 is small (for example, the adapter structure 22 is set to be a long strip shape extending along the length direction of the mounting wall 111, and the pole body 21 is arranged in the center of the adapter structure 22 and has a circular contour), and when the inner end surface 211 of the pole body 21 protrudes from the surrounding area 2201 towards the direction of the electrode component 3, the conductive part 33 can be arranged to include the tab 335 and the conductive member 336 connected with the tab 335, the conductive member 336 includes the first conductive segment 3365 laid on the inner end surface 211 of the pole body 21, and the second conductive segment 3366 offset from the inner end surface 211 of the pole body 21, the second conductive segment 3366 protrudes towards the direction away from the electrode component 3 (i.e. towards the outside, or towards the direction away from the active material coated part 32) relative to the first conductive segment 3365, and the tab 335 is connected with the second conductive segment 3366. In this way, the second conductive segment 3366 of the conductive member 336 and the tab 335 can be accommodated by the height difference of the inner end surface 211 of the pole body 21 relative to the surrounding area 2201, so that the space can be fully utilized, the space occupation of the conductive part 33 in the accommodation cavity 13 can be reduced, and the energy density of the battery monomer 102 can be improved. Exemplarily, if the part (such as the folding part 313 described herein) where the tab 335 is connected with the second conductive segment 3366 is in a long strip shape, the second conductive segment 3366 can also be arranged in a long strip shape, and the first conductive segment 3365 can be arranged in a circular shape matching the pole body 21, so as to meet the connection requirements. In addition, when the conductive member 336 includes the first conductive segment 3365 and the second conductive segment 3366, in order to ensure that the second conductive segment 3366 protrudes towards the direction away from the electrode component 3 relative to the first conductive segment 3365, the conductive member 336 can be processed by using a material with certain hardness and thickness, for example, the conductive member 336 can be a metal sheet.

[0366] For example, referring to FIG. 45, no matter whether the adapter structure 22 is raised relative to the mounting wall 111 in a direction away from the electrode component 3, the position of the inner end surface 220 of the adapter structure 22 adjacent to the pole body 21 is a surrounding area 2201 surrounding the pole body 21, and the surrounding area 2201 protrudes from the inner end surface 211 of the pole body 21 in a direction toward the electrode component 3. Here, the inner end surface 220 of the adapter structure 22 can be a planar structure or a non-planar structure, for example, a raised shape, and the inner end surface 220 of the adapter structure 22 has a surrounding area 2201 closest to the pole body 21.

[0367] For example, referring to FIG. 47, when the inner end surface 211 of the pole body 21 is large (for example, the adapter structure 22 is formed in a long strip shape extending along the length direction of the mounting wall 111, and the contour shape of the pole body 21 matches the contour shape of the adapter structure 22), and when the surrounding area 2201 protrudes from the inner end surface 211 of the pole body 21 in a direction toward the electrode component 3, the pole connecting part of the conductive part 33 (for example, the folded part 313 of the tab 335 or the second connecting segment 3363 of the conductive member 336) can be entirely laid on the inner end surface 211 of the pole body 21.

[0368] For example, referring to FIG. 47, when the inner end surface 211 of the pole body 21 is large (for example, the adapter structure 22 is formed in a long strip shape extending along the length direction of the mounting wall 111, and the contour shape of the pole body 21 matches the contour shape of the adapter structure 22), and when the surrounding area 2201 protrudes from the inner end surface 211 of the pole body 21 in a direction toward the electrode component 3, the pole connecting part of the conductive part 33 (for example, the folded part 313 of the tab 335 or the second connecting segment 3363 of the conductive member 336) can be entirely laid on the inner end surface 211 of the pole body 21.

[0369] Please refer to FIGS. 54-55, FIG. 54 is a structural sectional view of the battery monomer 102 according to some embodiments of the present application; and FIG. 55 is a partial enlarged view of the battery monomer 102 shown in FIG. 54. In some embodiments, the pole post body 21 is formed with a second accommodating groove 202, the second accommodating groove 202 opens towards the accommodating cavity, and the groove bottom wall of the second accommodating groove 202 is provided with a through hole 210, the conductive part 33 is arranged through the through hole 210 and at least partially accommodated in the second accommodating groove 202.

[0370] In the above technical solution, on the one hand, the pole post body 21 is provided with the second accommodating groove 202, which can reduce the weight of the pole post body 21 to some extent, so as to improve the weight energy density of the battery monomer 102 and the battery 100; on the other hand, since the groove opening of the second accommodating groove 202 is formed on the outer end surface 213 of the pole post body 21, and the outer end surface 213 of the pole post body 21 is the surface of the pole post body 21 away from the active material coating part 32, the second accommodating groove 202 can open towards the direction away from the active material coating part 32, so that when at least part of the conductive part 33 is accommodated in the second accommodating groove 202, the accommodation and arrangement of the conductive part 33 can be easily realized through the groove opening of the second accommodating groove 202, and the electrical connection operation of the conductive part 33 and the pole post body 21 can be easily realized through the groove opening of the second accommodating groove 202, and so on, thereby reducing the production difficulty of the battery monomer 102 and improving the production efficiency of the battery monomer 102.

[0371] At the same time, since the second accommodating groove 202 is communicated with the accommodating cavity 13 through the through hole 210, the second accommodating groove 202 can also serve as a buffer and temporary storage structure for the electrolyte, so that the accommodating cavity 13 can accommodate more electrolyte, since the electrolyte will be consumed during the charging and discharging process of the battery monomer 102, therefore, when there is more electrolyte, the service life of the battery monomer 102 can be prolonged; and also because the second accommodating groove 202 can be communicated with the accommodating cavity 13 through the through hole 210, the second accommodating groove 202 can also serve as a buffer and temporary storage structure for the gas generated inside the electrode assembly 31, thereby reducing the expansion of the battery monomer 102 and improving the reliability and stability of the battery monomer 102.

[0372] Please refer to FIGS. 56-59, FIG. 56 is a structural sectional view of the battery monomer 102 according to some embodiments of the present application; FIG. 57 is a partial enlarged view of the battery monomer 102 shown in FIG. 56; FIG. 58 is a structural sectional view of the battery monomer 102 according to some embodiments of the present application;

[0373] Fig. 59 is a partial enlarged view of the battery cell 102 shown in Fig. 58. The housing component 1 includes the shell body 11 having the opening 113 and the shell cover 12 covering the opening 113, and the mounting wall 111 includes the wall body of the shell body 11 opposite to the opening 113. That is, the pole component 2 is mounted on the wall body of the shell body 11 opposite to the opening 113.

[0374] In the embodiment, the pole component 2 and the mounting wall 111 are located on the same side of the electrode component 3, that is, the pole component 2 is arranged on the side where the mounting wall 111 is located, so that the pole component 2 can be mounted at the mounting hole 112 of the mounting wall 111. For example, when the mounting wall 111 is located above the electrode component 3, the pole component 2 is also located above the electrode component 3; when the mounting wall 111 is located below the electrode component 3, the pole component 2 is also located below the electrode component 3; when the mounting wall 111 is located on the side of the electrode component 3, the pole component 2 is also located on the same side of the electrode component 3.

[0375] For example, the housing component 1 can be surrounded by different wall surfaces, one of which is the mounting wall 111, and the mounting hole 112 is completely within the projection of the mounting wall 111 on the projection surface, and the projection area of the mounting hole 112 is smaller than the projection area of the mounting wall 111. One or more mounting holes 112 can be provided on the mounting wall 111 to meet the mounting requirements of one or more pole components 2.

[0376] Please refer to Figs. 60-63, Fig. 60 is a structural schematic view of the battery cell 102 according to some other embodiments of the present application; Fig. 61 is a structural exploded view of the battery cell 102 shown in Fig. 60; Fig. 62 is a structural sectional view of the battery cell 102 shown in Fig. 60; and Fig. 63 is a partial enlarged view of the battery cell 102 shown in Fig. 62. The housing component 1 includes the shell body 11 having the opening 113 and the shell cover 12 covering the opening 113, and the mounting wall 111 includes the shell cover 12. That is, the pole component 2 is mounted on the shell cover 12.

[0377] In the above technical solution, the pole component 2 can be arranged on the wall body of the shell body 11 opposite to the opening 113, or the pole component 2 can be arranged on the shell cover 12, so that the pole component 2 can be arranged flexibly.

[0378] In the above technical solution, the pole component 2 can be arranged on the wall body of the shell body 11 opposite to the opening 113, or the pole component 2 can be arranged on the shell cover 12, so that the pole component 2 can be arranged flexibly.

[0379] In the following, some specific embodiments according to the present application are described.

[0380] Embodiment One

[0381] In combination with FIG. 64, the housing component 1 has a receiving cavity 13, and includes a housing body 11 participating in enclosing the receiving cavity 13, the housing body 11 has an opening 113 at one end, the end of the housing body 11 opposite to the opening 113 is a mounting wall 111, the mounting wall 111 has a mounting hole 112, the pole component 2 is mounted on the mounting wall 111, and a cover is arranged at the mounting hole 112. The electrode component 3 includes a plurality of electrode assemblies 31 stacked together, so as to have an active material coated portion 32 received in the receiving cavity 13, and a tab 335 connected with the active material coated portion 32, the tab 335 is connected with the pole component 2. The pole component 2 includes a pole body 21, a transition structure 22, and an insulation structure 23, the transition structure 22 surrounds the pole body 21, the insulation structure 23 is insulatively fitted between the pole body 21 and the transition structure 22, the transition structure 22 is connected with the mounting wall 111, and the pole body 21 is connected with the tab 335.

[0382] In combination with FIG. 64, when assembling the battery cell 102, a plurality of electrode assemblies 31 are stacked along the thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assembly 31, the plurality of electrode assemblies 31 are stacked and connected with the multilayer tab sheets 311 of the same polarity to form a gathered portion 313, then the gathered portion 313 is connected with the pole body 21, the electrode component 3 is loaded into the housing body 11 according to the direction of the tab 335 relative to the active material coated portion 32 towards the mounting hole 112, with the movement of the electrode component 3 loaded into the housing body 11, the gathered portion 313 is caused to pass out to the outside of the mounting hole 112, the gathered portion 313 is connected with the pole component 2 arranged outside the mounting wall 111 outside the mounting wall 111, then the pole component 2 connected with the gathered portion 313 is covered on the mounting hole 112 from the outside of the mounting wall 111, and then the transition structure 22 is welded and fixed with the mounting wall 111.

[0383] In combination with FIG. 64, when assembling the battery cell 102, a plurality of electrode assemblies 31 are stacked along the thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assembly 31, the plurality of electrode assemblies 31 are stacked and connected with the multilayer tab sheets 311 of the same polarity to form a gathered portion 313, then the gathered portion 313 is connected with the pole body 21, the electrode component 3 is loaded into the housing body 11 according to the direction of the tab 335 relative to the active material coated portion 32 towards the mounting hole 112, with the movement of the electrode component 3 loaded into the housing body 11, the gathered portion 313 is caused to pass out to the outside of the mounting hole 112, the gathered portion 313 is connected with the pole component 2 arranged outside the mounting wall 111 outside the mounting wall 111, then the pole component 2 connected with the gathered portion 313 is covered on the mounting hole 112 from the outside of the mounting wall 111, and then the transition structure 22 is welded and fixed with the mounting wall 111.

[0384] Embodiment Two

[0385] In combination with FIG. 65, the housing component 1 has a receiving cavity 13, and includes a housing body 11 participating in enclosing the receiving cavity 13, the housing body 11 has an opening 113 at one end thereof, the housing body 11 has a mounting wall 111 at an opposite end thereof, the mounting wall 111 has a mounting hole 112 formed therein; the pole component 2 is mounted on the mounting wall 111, and a cover is arranged at the mounting hole 112. The electrode component 3 includes a plurality of electrode assemblies 31 stacked together, so as to have an active material coated portion 32 received in the receiving cavity 13, and a tab 335 connected to the active material coated portion 32, the tab 335 is connected to the pole component 2. The pole component 2 includes a pole body 21, a transition structure 22, and an insulation structure 23, the transition structure 22 surrounds the pole body 21, the insulation structure 23 is fitted between the pole body 21 and the transition structure 22 in an insulating manner, the transition structure 22 is connected to the mounting wall 111, and the pole body 21 is connected to the tab 335.

[0386] In combination with FIG. 65, in assembling the battery cell 102, a plurality of electrode assemblies 31 are stacked along a thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assemblies 31, the plurality of electrode assemblies 31 are stacked together with the multi-layered tab sheets 311 of the same polarity and connected to form a gathered portion 313, then the gathered portion 313 is connected to the pole body 21, the electrode component 3 and the pole component 2 connected to the gathered portion 313 are loaded into the housing body 11 in a direction that the pole component 2 faces the mounting hole 112 relative to the active material coated portion 32, as the electrode component 3 is loaded into the housing body 11, the pole component 2 is caused to pass out of the mounting hole 112 to an outside of the mounting wall 111, then the pole component 2 connected to the gathered portion 313 is covered on the mounting hole 112 from the outside of the mounting wall 111, and then the transition structure 22 is welded and fixed to the mounting wall 111.

[0387] In combination with FIG. 65, in assembling the battery cell 102, a plurality of electrode assemblies 31 are stacked along a thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assemblies 31, the plurality of electrode assemblies 31 are stacked together with the multi-layered tab sheets 311 of the same polarity and connected to form a gathered portion 313, then the gathered portion 313 is connected to the pole body 21, the electrode component 3 and the pole component 2 connected to the gathered portion 313 are loaded into the housing body 11 in a direction that the pole component 2 faces the mounting hole 112 relative to the active material coated portion 32, as the electrode component 3 is loaded into the housing body 11, the pole component 2 is caused to pass out of the mounting hole 112 to an outside of the mounting wall 111, then the pole component 2 connected to the gathered portion 313 is covered on the mounting hole 112 from the outside of the mounting wall 111, and then the transition structure 22 is welded and fixed to the mounting wall 111.

[0388] Embodiment Three

[0389] In combination with FIG. 66, the housing component 1 has a receiving cavity 13, and includes a housing body 11 participating in the formation of the receiving cavity 13, one end of the housing body 11 has an opening 113, the end of the housing body 11 opposite to the opening 113 is a mounting wall 111, the mounting wall 111 has a mounting hole 112; the pole component 2 is mounted on the mounting wall 111, and a cover is arranged at the mounting hole 112. The electrode component 3 includes a plurality of electrode assemblies 31 stacked together, so as to have an active material coated portion 32 received in the receiving cavity 13, and a tab 335 connected with the active material coated portion 32, the tab 335 is connected with the pole component 2. The pole component 2 includes a pole body 21, a transition structure 22, and an insulation structure 23, the transition structure 22 surrounds the pole body 21, and the insulation structure 23 is fitted between the pole body 21 and the transition structure 22 in an insulating manner, the transition structure 22 is connected with the mounting wall 111, and the pole body 21 is connected with the tab 335.

[0390] In combination with FIG. 66, in the assembly of the battery cell 102, a plurality of electrode assemblies 31 are stacked along the thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assembly 31, the plurality of electrode assemblies 31 are stacked and connected with the multilayer tab sheet 311 of the same polarity to form a folded portion 313, then the folded portion 313 is connected with the pole body 21, the electrode component 3 and the pole component 2 connected with the folded portion 313 are loaded into the housing body 11 in the direction that the pole component 2 is opposite to the active material coated portion 32 and faces the mounting hole 112, then the pole component 2 is covered from the inside of the mounting wall 111 to the mounting hole 112, and then the transition structure 22 is welded and fixed with the mounting wall 111.

[0391] In combination with FIG. 66, in the assembly of the battery cell 102, a plurality of electrode assemblies 31 are stacked along the thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assembly 31, the plurality of electrode assemblies 31 are stacked and connected with the multilayer tab sheet 311 of the same polarity to form a folded portion 313, then the folded portion 313 is connected with the pole body 21, the electrode component 3 and the pole component 2 connected with the folded portion 313 are loaded into the housing body 11 in the direction that the pole component 2 is opposite to the active material coated portion 32 and faces the mounting hole 112, then the pole component 2 is covered from the inside of the mounting wall 111 to the mounting hole 112, and then the transition structure 22 is welded and fixed with the mounting wall 111.

[0392] Embodiment Four

[0393] In combination with Fig. 67, the housing component 1 has a receiving cavity 13, and includes a housing body 11 participating in the formation of the receiving cavity 13, the housing body 11 has an opening 113 at one end thereof, the end of the housing body 11 opposite to the opening 113 is a mounting wall 111, the mounting wall 111 has a mounting hole 112 thereon; the pole component 2 is mounted on the mounting wall 111 and is blocked at the mounting hole 112. The electrode component 3 includes a plurality of electrode assemblies 31 stacked together, so as to have an active material coated portion 32 received in the receiving cavity 13, and a tab 335 connected with the active material coated portion 32, the tab 335 is connected with the pole component 2. The pole component 2 includes a pole body 21 and an insulating sealing component 24, the pole body 21 includes a first pole piece 21a and a second pole piece 21b, the second pole piece 21b defines a fitting hole 21b1, the first pole piece 21a is arranged on the side of the second pole piece 21b away from the electrode component 3 and covers the fitting hole 21b1, the second pole piece 21b is connected with the mounting wall 111, and the first pole piece 21a is connected with the tab 335.

[0394] In combination with Fig. 67, in the assembly of the battery cell 102, a plurality of electrode assemblies 31 are stacked along the thickness direction (for example, the fourth direction F4 shown in the figure) of the electrode assembly 31, and the plurality of electrode assemblies 31 are stacked together and connected with the multilayer tab sheets 311 of the same polarity to form a gathered portion 313. Then, on one hand, the gathered portion 313 is connected with the first pole piece 21a, and on the other hand, the second pole piece 21b is assembled to the mounting wall 111 in a riveting manner, and the insulating sealing component 24 is clamped between the second pole piece 21b and the mounting wall 111. Thereafter, the electrode component 3 and the first pole piece 21a connected with the gathered portion 313 can be loaded into the housing body 11 in a direction that the first pole piece 21a is relative to the active material coated portion 32 and faces the mounting hole 112, and with the movement of the electrode component 3 loaded into the housing body 11, the first pole piece 21a is caused to pass out of the fitting hole 21b1 to the outside of the mounting wall 111, and then the first pole piece 21a connected with the gathered portion 313 is covered on the fitting hole 21b1 from the outside of the mounting wall 111, and then the first pole piece 21a and the second pole piece 21b are welded and fixed.

[0395] In the welding of the gathered portion 313 and the first pole piece 21a, the gathered portion 313 has not yet been loaded into the housing body 11, which can improve the problem that the conductive chips formed in the welding process enter the housing body 11 and cause damage to the electrode component 3.

[0396] Embodiment Five

[0397] In combination with Fig. 68, compared with the embodiment four, the embodiment five is different in that the gathered portion 313 is passed through the fitting hole 21b1 first, and then the gathered portion 313 and the first pole piece 21a are welded, which will not be described herein.

[0398] It is worth noting that the above embodiments one to five are intended to illustrate the processing sequence of the battery cell 102, but the specific composition of the electrode cell 102 is not limited. For example, in the above embodiments one to five, the tab 335 and the terminal component 2 can be directly connected, or they can be connected through the conductive component 336 of the present application. For another example, in the above embodiments one to three, the form of the adapter structure 22 of the terminal component 2 is not limited, the form of the insulation structure 23 is not limited, and the shape of the terminal body 21 is not limited. All can refer to any of the above embodiments of the present application, and will not be elaborated here.

[0399] According to some embodiments of this application, this application also provides a battery 100, including a battery cell 102 of any of the above solutions.

[0400] In the technical solution of this application embodiment, by adopting the above-mentioned battery cell 102, the risk of short circuit of battery cell 102 can be reduced, which is conducive to improving the reliability of battery cell 102 and thus improving the reliability of battery 100.

[0401] For example, the battery 100 may further include a busbar, and multiple battery cells 102, at least two of which are electrically connected through the busbar. This allows for the series and / or parallel connection of multiple battery cells 102. For instance, when multiple battery cells 102 are connected in series, the anode terminal 2 of one battery cell 102 is connected to the cathode terminal 2 of the next battery cell 102 through a busbar, while the cathode terminal 2 of the same battery cell 102 is connected to the anode terminal 2 of the previous battery cell 102 through another busbar.

[0402] For example, referring to FIG2, the battery 100 includes a housing 101, and multiple battery cells 102 are housed in the housing 101. The bottom of the housing 101 is a housing bottom plate 1013. The terminal post 2 is disposed on the side of the housing component 1 facing the housing bottom plate 1013, or on the side of the housing component 1 away from the housing bottom plate 1013.

[0403] During the use of the battery 100, such as in vehicle use, the bottom plate 1013 of the housing is located at the bottom of the housing 101 in the direction of gravity. Thus, when the terminal component 2 is located on the side of the housing component 1 facing the bottom plate 1013, it means that the terminal component 2 is located at the bottom of the housing component 1 in the direction of gravity. At this time, the battery cell 102 is in an inverted state, and the depressurized products are ejected in the direction away from the passenger compartment, which is safer. When the terminal component 2 is located on the side of the housing component 1 away from the bottom plate 1013, it means that the terminal component 2 is located at the top of the housing component 1 in the direction of gravity. At this time, the battery cell 102 is in an upright state, and the electrolyte is not easy to leak. Therefore, the orientation of the battery cell 102 and the housing 101 can be flexibly set.

[0404] According to some embodiments of the present application, the present application also provides a power-using device, which comprises the battery cell 102 described in the above solutions; or, which comprises the battery 100 described in the above solutions, and the battery 100 is used to provide electric energy for the power-using device.

[0405] The power-using device can be the device or system of any one of the application batteries 100 described above.

[0406] In the technical solutions of the embodiments of the present application, by using the battery cell 102 or the battery 100 described above, the use reliability of the power-using device can be improved.

[0407] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, wherein, include: The housing component defines a receiving cavity and includes a mounting wall; An electrode component is mounted on the mounting wall and includes an electrode body; An electrode component is housed in the receiving cavity and includes an active material coating portion, a conductive portion, and an insulating member. The conductive portion connects the active material coating portion to the electrode body. At least a portion of the insulating member is disposed between the end of the active material coating portion connected to the conductive portion and the electrode body, and the insulating member has a clearance hole for the conductive portion to pass through. The conductive part is bent to form an open groove, and the insulating member extends into the open groove and abuts against at least a portion of the groove wall of the conductive part used to form the open groove.

2. The battery cell according to claim 1, wherein, The clearance hole includes a first clearance hole, and the insulating member includes: An insulating support is disposed at one end of the active material coating portion near the mounting wall and has the first clearance hole. The insulating support extends at least partially into the opening groove and abuts against at least a portion of the groove wall formed by the conductive portion.

3. The battery cell according to claim 2, wherein, The insulating support includes: The support body is located at one end of the active material coating portion near the mounting wall. The first clearance hole is opened in the support body. The first clearance hole has a first hole wall and a second hole wall that are disposed opposite to each other in the width direction of the pole body. A first partition plate is disposed at the wall of the first hole and connected to the bracket body. The first partition plate extends toward the center of the first clearance hole and extends into the opening groove, abutting against at least a portion of the groove wall formed by the conductive part of the opening groove.

4. The battery cell according to claim 3, wherein, The first separator extends horizontally from the first hole wall to the second hole wall, or extends obliquely toward the active material coating portion.

5. The battery cell according to claim 3, wherein, The thickness of the first separator is less than the thickness of the support body, and the first separator is separated from the hole wall of the first clearance hole on both sides of the pole body in the length direction, so that the first separator can be deformed under the pressure of the conductive part.

6. The battery cell according to claim 3, wherein, Along the length of the electrode body, the size of the first separator is greater than or equal to the size of the conductive part.

7. The battery cell according to claim 3, wherein, The conductive portion includes a converging section, a first extension section, and a second extension section arranged in its extending direction. The converging section is connected to the active material coating portion, and the second extension section is connected to the electrode body. A first end of the first extension section is connected to the converging section through a first bending portion, and the other end of the first extension section is connected to the second extension section through a second bending portion, so that the conductive portion forms at least two opening slots spaced apart in the thickness direction of the mounting wall, and the openings of the two opening slots face different directions. The first separator extends at least partially into the opening between the first extension and the abutting section, and at least abuts against the first extension.

8. The battery cell according to claim 7, wherein, In the width direction of the pole body, the size of the overlapping area between the first separator and the first extension is greater than half the size of the first extension and smaller than the size of the first extension.

9. The battery cell according to claim 3, wherein, The insulating support also includes: The second partition is disposed on the wall of the second hole and connected to the bracket body. The second partition extends toward the center of the first clearance hole and is spaced apart from the first partition, forming a through hole that communicates with the first clearance hole. The conductive part passes through the through hole, and the second partition abuts against the conductive part.

10. The battery cell according to claim 9, wherein, The dimension of the perforation in the width direction of the electrode body is greater than or equal to the thickness of the conductive part.

11. The battery cell according to claim 9, wherein, Along the length of the electrode body, the size of the second separator is greater than or equal to the size of the conductive part.

12. The battery cell according to claim 9, wherein, The conductive portion includes a converging section, a first extension section, and a second extension section arranged in its extending direction. The converging section is connected to the active material coating portion, and the second extension section is connected to the electrode body. A first end of the first extension section is connected to the converging section through a first bending portion, and the other end of the first extension section is connected to the second extension section through a second bending portion, so that the conductive portion forms at least two opening slots spaced apart in the thickness direction of the mounting wall, and the openings of the two opening slots face different directions. The second separator extends toward the opening groove between the first extension and the second extension, and at least abuts against the converging portion.

13. The battery cell according to claim 12, wherein, In the width direction of the pole body, the size of the area where the second separator overlaps with the converging section is less than half the size of the converging section.

14. The battery cell according to any one of claims 2-13, wherein, The clearance hole includes a second clearance hole, and the insulating member includes: An insulating film is provided, which completely covers the active material coating portion. The second clearance hole is opened at the position opposite to the mounting wall of the insulating film and is adapted to the thickness of the conductive portion. The peripheral wall of the insulating film forming the second clearance hole is blocked between the insulating support and the active material coating portion. The conductive portion passes through the second clearance hole and the first clearance hole in sequence and is connected to the pole body.

15. The battery cell according to claim 14, wherein, A retaining piece is connected to at least a portion of the circumferential region of the insulating film around the second clearance hole, and the hardness of the retaining piece is greater than that of the insulating film.

16. The battery cell according to any one of claims 1-15, wherein, The conductive part includes a converging section, a first extension section and a second extension section arranged in its extending direction. The converging section is connected to the active material coating part, the second extension section is connected to the electrode body, and the two ends of the first extension section are respectively connected to the converging section and the second extension section. The first extension section passes through the clearance hole, and the approaching section and the second extension section are located on both sides of the insulating member, respectively.

17. The battery cell according to claim 16, wherein, The conductive part includes a plurality of stacked tabs, and the plurality of tabs are close together near the root of the active material coating part to form a triangular close-up segment. The plurality of tabs are brought together and connected at a position on the approaching section away from the active material coating to form the first extension section and the second extension section.

18. The battery cell according to claim 16, wherein, The first end of the first extension is connected to the abutting section via a first bend, and the three define a first opening groove. The second end of the first extension is connected to the second extension via a second bend, and the three define a second opening groove. The openings of the first opening groove and the second opening groove face different directions and are spaced apart in the thickness direction of the mounting wall. The insulating member extends at least partially into the first opening groove to be located between the first extension and the active material coating.

19. The battery cell according to claim 18, wherein, The insulating element extends at least partially toward the direction of the second opening groove, so as to be located between the second extension and the active material coating portion.

20. The battery cell according to claim 16, wherein, The approaching section, the first extension section, and the second extension section define a third opening groove, and the insulating member extends at least partially into the third opening groove to block the second extension section from the active material coating portion.

21. The battery cell according to any one of claims 16-20, wherein, The conductive part includes a tab, which includes a plurality of stacked tab pieces, and the converging section, the first extension section and the second extension section are formed by different parts of the tab.

22. The battery cell according to any one of claims 16-20, wherein, The conductive part includes: A tab is connected to one end of the active material coating near the mounting wall, and the tab includes a plurality of stacked tab pieces; A conductive element is connected between the tab and the post body, a portion of the conductive element forming the second extension and another portion forming at least a portion of the first extension, and at least a portion of the tab forming the abutment section.

23. The battery cell according to claim 22, wherein, The conductive element includes an adapter piece, which comprises multiple stacked and connected adapter foils to make the adapter piece deformable.

24. The battery cell according to any one of claims 1-23, wherein, The pole component further includes a transition structure and an insulation structure. The transition structure surrounds the pole body and is connected to the mounting wall. The insulation structure is insulated and sealed between the transition structure and the pole body.

25. The battery cell according to claim 24, wherein, The adapter structure is formed as an elongated strip extending along the length of the mounting wall, and the outline shape of the pole body matches the outline shape of the adapter structure. Alternatively, the adapter structure may be formed as an elongated strip extending along the length of the mounting wall, with the pole body located at the center of the length of the adapter structure and being circular.

26. The battery cell according to claim 24, wherein, The insulating structure includes a sealing structure member, which is circumferentially disposed on the side of the adapter structure facing the pole body and is at least partially clamped between the adapter structure and the pole body in the inward and outward directions of the mounting wall.

27. The battery cell according to claim 24, wherein, The mounting wall has mounting holes, the pole component covers the mounting holes, and the edge of the transition structure overlaps one side of the mounting wall in the wall thickness direction.

28. The battery cell according to claim 27, wherein, The edge of the adapter structure overlaps with the side of the mounting wall away from the electrode component. The mounting wall has a first recessed groove surrounding the mounting hole. The first recessed groove opens in the direction away from the electrode component. The edge of the adapter structure has a flange portion embedded in the first recessed groove.

29. The battery cell according to claim 27 or 28, wherein, The edge of the adapter structure overlaps with the side of the mounting wall opposite to the electrode component. The mounting hole is an elongated hole, and the pole component is formed into an elongated structure that matches the shape of the mounting hole.

30. The battery cell according to claim 27, wherein, The edge of the adapter structure overlaps with the side of the mounting wall facing the electrode component. The edge of the adapter structure has a second recessed groove that opens in a direction away from the electrode component. The mounting wall includes an overlapping portion protruding into the mounting hole, and the overlapping portion is embedded in the second recessed groove.

31. The battery cell according to claim 24, wherein, The electrode post component forms a first receiving groove that is recessed relative to the mounting wall in a direction away from the electrode component and open in a direction towards the electrode component. The electrode component is connected to the electrode post component through a conductive part. At least a portion of the conductive part is received in the first receiving groove and connected to the electrode post body.

32. The battery cell according to claim 24, wherein, The electrode body has a second receiving groove, which is open to the opposite side of the receiving cavity, and the bottom wall of the second receiving groove is provided with a through hole. The conductive part passes through the through hole and is at least partially received in the second receiving groove.

33. The battery cell according to any one of claims 1-32, wherein, The housing component includes a housing body with an opening and a housing cover, the housing cover being closed to the opening; the mounting wall includes a wall body disposed opposite to the opening, and / or the mounting wall includes the housing cover.

34. A battery, wherein, Includes the battery cell according to any one of claims 1-33.

35. The battery according to claim 34, wherein, The battery includes a housing, and the battery cells are multiple and housed in the housing. The bottom of the housing is a housing bottom plate. The terminal post is located on the side of the housing component facing the housing bottom plate, or on the side of the housing component away from the housing bottom plate.

36. An electrical appliance, wherein, It includes the battery cell according to any one of claims 1-33; or, it includes the battery according to claim 34 or 35.

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