1198results about "Electric connector introduction" patented technology

The invention provides a battery monomer structure, which comprises a naked battery cell, wherein the naked battery cell is provided with a concave part I which is concave inwards; the Mylar film is wrapped on other parts except the concave part of the naked battery cell; the shell is provided with an opening end, and the opening end of the shell is provided with a concave part II which is concave inwards; the shell is provided with an opening end, the top cover assembly is provided with an insulating plastic plate in a clamping manner, the bottom of the top cover assembly is provided with an insulating plastic plate in a clamping manner, the top cover assembly is arranged at the opening end of the shell in a covering manner, and the shell and the top cover assembly are enclosed to form a containing space. The top cover plate and the naked battery cell are insulated through the lower plastic, the bent position of the tab and the shell are insulated through the plastic clamping plate, the safety of the battery cell is protected, the battery pole is concave inwards to improve the space utilization rate of the battery, meanwhile, the resistance is reduced by reducing the current passing path, namely, the internal resistance is reduced to reduce the self heat release of the battery, and the temperature rise of the battery is reduced.

A battery pack comprising a frame and two or more battery cells installed to the frame. The two or more battery cells are interconnected by a rotatable connector which is configured to enable electrical connections between the two or more battery cells. The rotatable connector is adapted to be switched between at least a first rotational position in which the two or more battery cells being electrically connected, and a second rotational position, in which the two or more battery cells being not electrically connected. When the user actuates the knob on the battery pack, the connecting terminals change their rotational positions from a non-conducting position to a conducting position, thereby enabling the electrical connections between the groups of battery cells.

The utility model provides a battery monomer, a battery device and a power utilization device, and belongs to the technical field of batteries. The battery monomer comprises a shell, an electrode assembly, an electrode terminal, a fixing piece and a first insulating piece, the electrode assembly is housed within the housing. The electrode terminal is disposed on a wall portion of the housing and is electrically connected to the electrode assembly. The fixing piece is arranged on the peripheral side of the electrode terminal, the fixing piece comprises a base part and a limiting part, the base part is connected to the wall part, the limiting part is connected to the base part and extends in the direction close to the electrode terminal, and the limiting part is configured to limit the electrode terminal to move in the direction away from the electrode assembly in the thickness direction of the wall part. And at least part of the first insulating part is arranged between the electrode terminal and the limiting part. The thickness of the limiting part is smaller than that of the base part. Therefore, the space for accommodating the first insulating part between the limiting part and the electrode terminal can be enlarged while the connection strength requirement of the base part and the wall part of the fixing part is met, so that the creepage distance between the limiting part and the electrode terminal can be increased.

The invention discloses a cover plate assembly, a battery and a battery module, and belongs to the technical field of power batteries. The cover plate assembly comprises a cover plate piece and a pole piece, the cover plate piece is provided with a mounting hole, and the pole piece is positioned in the mounting hole and is insulated from the cover plate piece; a groove structure is arranged on the end face, located on the inner side of the cover plate piece, of the pole piece, the groove structure is used for containing a tab of a battery cell, and the inner side wall of the groove structure is connected with the tab in a welded mode. According to the cover plate assembly, the current conduction path can be greatly shortened, and the connection impedance and the contact resistance of the battery are reduced. Meanwhile, the cover plate assembly reduces the potential failure risk caused by multi-component assembly and multiple welding.

The utility model provides a single battery and a battery pack, and relates to the technical field of batteries. The single battery comprises a shell, an anti-explosion valve, an electrode assembly and a supporting piece. An installation hole is formed in the bottom wall of the shell, the anti-explosion valve is connected with the bottom wall to seal the installation hole, the electrode assembly is located in the containing cavity of the shell, the supporting piece is located in the containing cavity and located between the electrode assembly and the bottom wall, the supporting piece comprises a first supporting part and a second supporting part, and the second supporting part is connected to the side, away from the electrode assembly, of the first supporting part. A positioning groove communicated with the containing cavity is formed in the bottom wall, a part of the second supporting part is located in the positioning groove, so that the first supporting part and the bottom wall jointly define an exhaust channel, and the exhaust channel is communicated with the containing cavity. According to the single battery provided by the invention, the exhaust channel is jointly defined by the first supporting part and the bottom wall, so that high-temperature and high-pressure gas can be conveniently evacuated when thermal runaway occurs; and through cooperation of the positioning groove and the second supporting part, the stability of the supporting piece is improved.

The utility model belongs to the technical field of batteries, and discloses a battery shell and a battery, the battery shell comprises a shell body, a cover plate module, a composite cover plate, a composite pole and a protective end plate, the cover plate module comprises a first cover plate body and a connecting pole penetrating through the first cover plate body, the composite cover plate is provided with a penetrating structure for the pole lug to extend out, the composite pole column is arranged on one side, deviating from the cover plate module, of the composite cover plate, the pole lug extending out of the accommodating cavity realizes current conduction through the composite pole column, and the protective end plate is provided with an avoiding through hole for the pole lug to penetrate through. The tab on one side and the composite pole located on the outer side of the containing cavity achieve current conduction through the penetrating structure, the space occupied by the composite pole and the space for connecting the bent tab and the composite pole are saved, the space utilization rate is increased, space is provided for increasing the size of the pole set, the energy density is increased, and the service life of the pole set is prolonged. And the pole lug is prevented from skewing during passing through the protection end plate, so that the reliability of the structure is improved.

The present application provides a battery cell, a battery device, and an electric apparatus. The battery cell comprises a casing and an electrode assembly; the casing comprises a casing body and an end cover; the casing body is provided with an opening; the end cover covers the opening and is connected to the casing body; the casing body and the end cover define an accommodating cavity; the electrode assembly is accommodated in the accommodating cavity. The casing body comprises a first wall, and the first wall intersects with the end cover and comprises a wall body and a cushioning portion that are connected to each other. The cushioning portion is flexibly connected between the wall body and the end cover in a deformable mode. The battery cell provided by the present application is conducive to reducing the expansion force of the electrode assembly or the action force of an external load borne at the connecting position of the end cover and the casing body, thereby reducing the risk of cracking at the connecting position of the end cover and the casing body. In this way, the reliability of the battery cell is improved.

The utility model belongs to the technical field of medical instruments and equipment, and discloses a cover plate assembly, a minicell and a capsule endoscope, the cover plate assembly comprises a cover plate, a pole structure and a sealing ring, the cover plate is used for sealing an opening and is in sealing fit with the side wall of the opening, so that sealing is formed between the cover plate and a shell; a sealing ring accommodating groove is formed in the peripheral side wall of the pole structure; the sealing ring is arranged on the peripheral side wall of the pole structure, is accommodated in the sealing ring accommodating groove and is in sealing fit with the sealing ring accommodating groove, so that the sealing performance between the sealing ring and the pole structure is enhanced, the position of the sealing ring relative to the pole structure is fixed, the assembly is convenient, and the service life is prolonged. The outer peripheral side wall of the sealing ring is in sealing fit with the inner peripheral side wall of the cover plate, so that the inner side and the outer side of the sealing ring can form good sealing with the pole structure and the cover plate respectively, liquid leakage is avoided, meanwhile, a traditional glass sealing structure is replaced by the sealing ring, and the machining and precision control difficulty can be reduced.

The invention belongs to the technical field of batteries, and discloses a battery monomer which comprises a battery shell, a battery cover plate and a pole group, the battery shell is provided with a containing cavity and an opening which are communicated, the opening is located in the side, facing a first direction, of the battery shell, the battery cover plate comprises a plate body, and the plate body covers the opening; the plate body comprises a plate body part and a first protruding part which is connected with the plate body part and protrudes towards a first direction, a capacity increasing groove is formed in the side, deviating from the first direction, of the first protruding part, the pole group comprises a pole group body structure and a first protruding structure which is connected to the side, facing the first direction, of the pole group body structure, and the pole group body structure is arranged in the containing cavity; all side walls, parallel to the first direction, of the pole group body structure are attached to the inner wall of the containing cavity, the first protruding structures are located in the capacity increasing grooves, the groove bottoms of the capacity increasing grooves and at least one group of oppositely-arranged inner walls of the capacity increasing grooves are all attached to the first protruding structures, the probability of deformation and damage of the plate bodies of the single batteries is low, the pole group capacity is large, and the capacity of the single batteries is high. And the moving probability of the pole group is low.

The present application relates to the technical field of batteries, and provides a cover plate assembly, a battery, and an electrical device. The cover plate assembly comprises a cover plate and an electrode terminal. A mounting hole is provided in the center of the cover plate, the cover plate comprising a first insulating member. The electrode terminal comprises a terminal piece and a second insulating member, the second insulating member being arranged on a side of the terminal piece. The terminal piece at least partially passes through the mounting hole and is connected to the cover plate. The second insulating member is in surface contact with the first insulating member. The cover plate assembly provided in examples of the present application can reduce the possibility of mutual interference of different parts of a battery cover plate during assembly, and improve the assembly efficiency and assembly reliability of the battery cover plate.

The utility model relates to the technical field of power batteries, and discloses a battery cell and a battery pack, the battery cell comprises a shell, one side of which is provided with an opening; the peripheral contour of the cover plate is matched with the shape of the opening of the shell, a pair of pole columns are installed on the cover plate, the pole columns penetrate through the cover plate, and a through groove is formed in the position, between the pole columns, of the cover plate; one end of each connecting sheet is connected with the corresponding pole, and the other end of each connecting sheet extends to the position of the through groove; the pole group is arranged in the shell, one end of the pole group is provided with a pole lug, and the pole lug extends towards the direction of the cover plate and is bent towards the direction of the connecting sheet; the periphery outline of the sealing plate is matched with the through groove, a liquid injection hole is formed in the sealing plate, a plurality of shielding parts are arranged at the position, located at the liquid injection hole, of the lower surface of the sealing plate, and the shielding parts are distributed at intervals in the circumferential direction of the liquid injection hole. And the liquid injection is difficult, so that the production efficiency is influenced.

The invention discloses a battery shell assembly, a battery and a battery pack, and relates to the technical field of batteries, the battery shell assembly comprises a shell, a pole and an insulating part, the pole is arranged on a first wall of the shell, the pole comprises a pole body and a first protruding part, the first protruding part is arranged on the peripheral side of the pole body, and the first protruding part is arranged in the shell; the projection of the first protruding part in the first direction is at least partially overlapped with the first wall; the insulating part is at least partially arranged between the first wall and the first protruding part, the high-temperature pressure-bearing change rate of the insulating part is k, the spacing distance between the first wall and the first protruding part in the first direction is d, and the parameters meet a preset relationship, so that the shell, the pole and the insulating part are matched with each other, and the insulating part is not easy to deform in the working process of the battery; deformation and bending at the joint of the first wall and the insulating part are avoided, and the risk of lap joint of the first wall and the pole is further avoided. The battery and the battery pack provided by the invention apply the battery shell assembly and have the beneficial effects of the shell assembly.

The invention belongs to the technical field of batteries, and discloses a cover plate assembly and a battery cell, the cover plate assembly comprises a cover plate, a pole structure and a supporting structure, the cover plate is used for covering an opening of a shell of the battery cell, the opening is located on one side, facing a first direction, of the shell, the cover plate comprises a first plate body and a second plate body, the first plate body is perpendicular to the first direction, and the second plate body is perpendicular to the second direction. The second plate body comprises a first side and a second side which are oppositely arranged, the first side is connected with the first plate body, the second plate body inclines towards the second direction from the first side to the second side, the second direction is opposite to the first direction, the pole structure penetrates through the second plate body, and in the first direction, the first plate body protrudes out of the pole structure to protect the pole structure; the supporting structure comprises a supporting piece, and the supporting piece is connected to the side, facing the second direction, of the first plate body and the side, facing the second direction, of the second plate body so as to improve the structural strength of the cover plate.

Disclosed in the present application are a battery and an electric device, which belong to the technical field of batteries. The battery of the present application comprises: a battery cell comprising a housing and an electrode terminal, the electrode terminal being arranged in the housing; a case assembly comprising a case, the case comprising a body part and a partition part, an accommodating space being formed inside the body part, the partition part being located in the accommodating space and dividing the accommodating space into two first accommodating cavities, the two first accommodating cavities respectively extending through surfaces of the body part in opposite directions and respectively forming openings on the surfaces of the body part, and at least one battery cell being arranged in each first accommodating cavity. Two first accommodating cavities are arranged in the box body, a battery cell can be placed in each first accommodating cavity, and the electrode terminal is located on the side of the housing facing away from the partition part. When there are a plurality of battery cells, the plurality of battery cells can be attached to each other, so that the space in the first accommodating cavity is more fully utilized, thereby improving the volumetric energy density of the battery.

The invention provides a battery monomer and a battery pack, and relates to the technical field of batteries. The battery monomer comprises a shell, an end cover, an electrode assembly, a pole and a current collector, the shell is provided with an accommodating cavity; the end cover is connected with the shell and covers the accommodating cavity; the electrode assembly is arranged in the accommodating cavity and is electrically connected with the shell; the pole penetrates through the end cover and is insulated from the end cover, the pole is provided with a sinking groove and a mounting through hole communicated with the sinking groove, and the sinking groove is located on the side, away from the electrode assembly, of the pole and provided with a groove wall; the current collecting piece comprises a first current collecting part penetrating through the mounting through hole, the first current collecting part is electrically connected with the electrode assembly, and the part, located in the sinking groove, of the first current collecting part is electrically connected with the groove wall. In the battery monomer provided by the invention, the shell is connected with the end cover without adopting an upsetting and sealing process, so that the space occupied by the turnup part of the shell is saved, and the energy density of the battery monomer is favorably improved.

The invention provides an improved explosion-proof valve, a battery shell and a battery pack aiming at the problems that an existing explosion-proof valve is easy to crack in charge-discharge circulation and cannot be normally opened under extreme conditions. Annular and directional nicks are arranged on the valve plate of the anti-explosion valve to form a weak area, and the mechanical property is optimized and the structural strength and the pressure relief sensitivity are balanced by accurately controlling the nick size (a = c = b / 2, and d: c = (0.25-0.45)). The nick layout comprises transverse nicks, longitudinal nicks and oblique nicks, a multi-dimensional stress release network can be formed through combination, the response speed is increased, and the anti-fatigue performance is improved. The battery shell comprises the anti-explosion valve and is installed on a pressure relief hole in the bottom wall of the shell, electric arc discharge is avoided, and the space utilization rate and the overall protection performance are improved. The battery pack is composed of a battery shell, a pole group and an end cover, the explosion-proof valve is installed at the bottom, high-temperature gas is prevented from impacting electronic elements, the risk of secondary damage is reduced, meanwhile, a pressure relief channel is kept unblocked through gravity, and the safety of a battery system is remarkably improved.

The present application discloses a battery cell, a battery and an electric device. The battery cell comprises: a housing having an opening; and an electrode assembly accommodated in the housing and comprising a main body, a first tab and a second tab, the first tab and the second tab having opposite polarities and being arranged on the same side of the main body, wherein the first tab and the second tab extend from an open end of the housing, the housing comprises a bottom wall opposite to the opening, and an explosion-proof valve is arranged on the bottom wall. The battery cell provided by the present application has high capacity and high reliability.

The invention relates to a cover assembly of a battery cell, comprising a metallic base plate (2), at least one terminal (3, 4) which is arranged in a through-opening (20) of the base plate (2), a sealing element (5, 5') which fastens and seals the terminal to the base plate (2), wherein the sealing element (5, 5') is arranged in the through-opening (20) and is designed to seal a first connection region (6) between the terminal (3, 4) and the sealing element (5) and a second connection region (7) between the base plate (2) and the sealing element (5, 5') and to provide a connection between the terminal (3, 4) and the base plate (2).

The utility model provides a battery cell and a square-shell battery, and relates to the technical field of batteries. The cell has a winding center. The battery cell comprises a first pole piece, a first connecting piece and a first tab, the first pole piece comprises a plurality of straight sections, and at least part of the straight sections are connected with the first tab. The first tab comprises a first connecting part and a first bending part which are connected with each other, the first connecting part is connected with the straight section, and each first bending part is bent towards the winding center. The first bending parts of the plurality of first tabs are connected with the first connecting sheet, a first included angle alpha is formed between the first connecting part and the first bending part, and the first included angle alpha is greater than or equal to 90 degrees and less than or equal to 160 degrees. Therefore, the possibility that the tabs are reversely inserted to pierce the first pole piece can be reduced, the performance of the battery cell and the square-shell battery carrying the battery cell can be improved, and the possibility that the square-shell battery is short-circuited and the like to cause safety problems is reduced.

The utility model discloses an extremely simple injection-molded top cover structure of a square battery, which relates to the technical field of batteries, and comprises a top cover sheet, a positive pole assembly, a negative pole assembly and a lower insulating plate, a positive pole mounting hole and a negative pole mounting hole are symmetrically formed at two ends of the top cover sheet, the positive pole assembly is welded on the positive pole mounting hole, and the negative pole assembly is welded on the negative pole mounting hole. The negative electrode assembly is welded on the negative electrode mounting hole, and a lower insulating plate is fixedly arranged below the top cover plate. According to the design, a larger space can be provided for the pole within the limited area of the top cover plate, so that the size of the pole can be expanded, the overcurrent capacity of the battery cell is improved, and the safety of the battery cell is ensured.

The utility model belongs to the technical field of batteries, and discloses a battery shell and a battery, the battery shell comprises a shell body and a cover plate assembly, the shell body is a hollow shell mechanism with an opening at one side, the cover plate assembly comprises a cover plate body, a first insulating part and a composite pole, the cover plate body is arranged at the opening of the shell body and seals the shell body, and the composite pole is arranged on the first insulating part. The cover plate body is used for forming an accommodating cavity for accommodating a pole group, the cover plate body is provided with a first penetrating structure through which a lug extends out of the accommodating cavity, the first insulating part is arranged on the cover plate body in an injection molding manner and is used for isolating the cover plate body from the lug, and the composite pole column is arranged on one side, deviating from the pole group, of the cover plate body and realizes current conduction with the lug. Through the arrangement of the first penetrating structure, the tab can realize current conduction with the composite pole located on the outer side of the accommodating cavity through the first penetrating structure, so that the space occupied by the composite pole and the space for connecting the bent tab with the composite pole are saved, the extra space occupation is reduced, the volume of the pole group can be further increased, and the energy density is improved.

The invention provides a battery monomer, a battery and electric equipment, and relates to the field of batteries. The battery monomer comprises a shell, an end cover and a pressure relief mechanism, the shell is provided with an opening, the end cover seals the opening, and the end cover is welded with the shell to form a first welding printing part; the pressure relief mechanism is arranged on the end cover and comprises a weak part, and the weak part is configured to be at least partially cracked when the battery monomer is subjected to pressure relief. In the direction perpendicular to the thickness direction of the end cover, the minimum distance between the weak part and the first welding printing part is A, and the requirement that A is larger than or equal to 2.5 mm is met. The minimum distance between the weak part and the first welding printing part in the direction perpendicular to the thickness direction of the end cover is larger than or equal to 2.5 mm, so that the influence of high heat on the weak part when the shell and the end cover are welded is reduced, the risk that the weak part cracks in advance is reduced, and the service life of the single battery is prolonged.

A battery having a first direction, a second direction and a third direction arranged perpendicular to each other, characterized in that it comprises: a cover plate body, wherein at least two first through-holes are arranged on the cover plate body, and an arrangement direction of two adjacent first through-holes is the first direction; a metal block, wherein the metal block is provided on one side of the cover plate body in the second direction, the second direction being the direction perpendicular to a plane in which the cover plate body is located, and the metal block has second through holes, the number of the first through holes being equal to the number of the second through holes, and the first through holes are connected to the second through holes in a one-to-one correspondence; Connection terminals, wherein the number of connection terminals is equal to the number of the first through-holes, the connection terminals correspond to the first through-holes in a one-to-one correspondence, the connection terminals penetrate into the first through-holes and the second through-holes along the second direction, and the connection terminals are firmly connected to the metal block; where the sum of the projection areas of the first through-holes projected along the second direction onto the metal block is “a” mm 2 and a first distance is provided between two adjacent terminals in at least two terminals in the first direction, and a sum of each first distance is “b” mm, and a dimension of the metal block along the third direction is “c” mm, where 0.015≤a / (b*c)≤2.5.

The utility model belongs to the technical field of power batteries, and discloses a battery cover plate and a battery, the battery cover plate comprises a cover plate body, a combined colloid and a connecting sheet, the cover plate body is provided with a tab through hole for a tab to pass through; the combined colloid comprises upper plastic, the upper plastic is arranged on the upper side of the cover plate body, and the upper plastic is provided with through holes corresponding to the through holes of the tabs; the battery comprises a shell and the battery cover plate, an opening is formed in the shell, the battery cover plate blocks the opening, and the lower side face of the cover plate body faces the interior of the shell. The connecting piece can be fixed on the upper plastic on the upper side of the cover plate body in a gluing manner, and the tab in the shell can extend out of the shell from the tab through hole of the cover plate body and the through hole of the upper plastic, so that the traditional manner that the connecting piece is arranged in the shell is replaced, and the space utilization rate can be further improved.

The utility model discloses a battery cell structure. The battery cell structure comprises a first pole piece, a first diaphragm and a plurality of supporting particles, the first pole piece is provided with a first bending area, the first diaphragm is attached to the first pole piece, and the first diaphragm is provided with a second bending area corresponding to the first bending area. The second bending area is coated with the multiple supporting particles, and gaps among the multiple supporting particles are used for containing electrolyte. Wherein the surface, facing the first diaphragm, of the first bending area is sunken to form a plurality of first grooves, and the first grooves are all used for containing electrolyte. Through the design of the supporting particles and the first grooves, the storage space of the electrolyte is increased at the bending part of the battery cell structure, so that the electrolyte retention effect at the corner of the battery cell is improved. Therefore, the battery cell structure provided by the utility model can provide enough electrolyte at the bending part for migration of the lithium ions, and the lithium ions are effectively separated from the positive electrode and embedded into the negative electrode, so that the lithium separation phenomenon is prevented.

The invention provides a shell assembly, a battery, a battery assembly and electronic equipment, and relates to the technical field of electronic equipment, a shell of the shell assembly is provided with an accommodating cavity, the accommodating cavity is suitable for accommodating a pole core assembly, the shell is provided with a first mounting part, the first mounting part sinks towards the accommodating cavity, and the first mounting part is provided with a second mounting part; the second installation part sinks towards the containing cavity and is suitable for containing the circuit board assembly. According to the shell assembly provided by the invention, the increase of the total height of the shell assembly by the circuit board assembly can be reduced, and the space occupancy rate of the shell assembly and the battery is reduced.

The utility model provides a battery monomer and a power battery, and relates to the technical field of batteries. The top cover assembly of the battery monomer comprises a top cover sheet with a mounting hole, a pole column penetrating through the mounting hole, and a plastic part arranged at the mounting hole and positioned between the top cover sheet and the pole column. A first anti-torsion structure is arranged on the peripheral side of the pole, the first anti-torsion structure is arranged close to the top of the pole, a through hole is formed in the plastic part, the pole penetrates through the through hole, a second anti-torsion structure is arranged on the hole wall of the through hole, and the first anti-torsion structure and the second anti-torsion structure are matched to limit the pole to rotate around the axis of the pole relative to the plastic part. According to the battery monomer provided by the invention, through the cooperation of the first anti-torsion structure and the second anti-torsion structure, the pole has higher anti-torsion capability, so that the possibility of loosening or falling off of the pole is reduced, and the use safety of the battery monomer is further improved.

A battery having a first direction, a second direction, and a third direction perpendicular to each other, characterized in that it comprises a housing, a cover plate, and a cell, wherein a receiving cavity is provided in the housing, the cover plate is arranged on the housing and seals the receiving cavity, the cell is provided in the receiving cavity, the cell comprises a cell body and a tab, an electrode is provided in the cell body, the tab extends outwardly from one side of the electrode, and a direction in which the tab extends is the first direction, and a direction along the plane of the tab and perpendicular to the first direction is the second direction, a dimension of the tab in the second direction is "L1" mm, and a dimension of the cell body in the second direction is "L2" mm, where L1 <L2;wherein the tab has a reinforcing portion, and in the first direction, a minimum distance between an end of the reinforcing portion near the electrode and the electrode is "h1" mm, and a dimension of the tab in the first direction is "H" mm, where 0.002≤(L1 / L2)*(h1 / H)≤0.07.;

A cylindrical battery, an electronic device, and a manufacturing method of the cylindrical battery is provided. The cylindrical battery includes a housing, an electrode assembly disposed within the housing, and a current collecting member electrically connected to the electrode assembly. The housing includes a sidewall, and one end of the sidewall is formed with an opening. The position of the sidewall near the opening includes a groove that is recessed towards the interior of the housing. The current collecting member is at least partially disposed between the electrode assembly and the groove. The current collecting member includes a current collecting body and a connecting piece attached to the periphery of the current collecting body. The connecting piece is bent towards the axis of the housing and welded to the surface of the groove facing the electrode assembly to form a welded part.

Discussed is a battery pack to which a folding structure is applied and a manufacturing method thereof, and more particularly, to a battery pack in which battery cells are connected in series using a connection plate in an unfolded state, then wrapped and fixed with individual housings, and a folding structure is applied to form a cell stack structure of the battery cells by folding the connection plate connecting the battery cells in that state and a manufacturing method thereof.