CN218632356U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a battery housing structure; the battery comprises a battery cell, a battery shell structure and a battery cover, wherein the battery cell is arranged in the battery shell structure and comprises a cell main body and a lug, the lug extends out of the cell main body, and the lug comprises a connecting end connected with the cell main body and a free end far away from the cell main body; the soldering-assistant piece, utmost point ear is located between soldering-assistant piece and the battery case structure, utmost point ear and the welding of soldering-assistant piece, in order to form the welding seal in one side that the soldering-assistant piece deviates from utmost point ear, the soldering-assistant piece is held including the first end that is close to the link and the second of keeping away from the link, the minimum distance of welding between seal and the first end is not more than the minimum distance of welding seal and second end, thereby can improve the battery case structure, utmost point ear and the tensile strength of soldering-assistant piece position department, and then the joint strength of battery case structure and utmost point ear has been improved, with this safety in service performance who improves the battery.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

In the related art, the cover plate assembly of the battery can be connected with the pole lug of the battery cell, and due to the structural limitation of the pole lug, the welding quality of the cover plate assembly and the pole lug is relatively poor, so that the connection strength of the cover plate assembly and the pole lug is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a battery housing structure;

the battery comprises a battery cell, a battery shell structure and a battery cover, wherein the battery cell is arranged in the battery shell structure and comprises a cell main body and a lug, the lug extends out of the cell main body, and the lug comprises a connecting end connected with the cell main body and a free end far away from the cell main body;

the soldering-assistant piece, utmost point ear are located between soldering-assistant piece and the battery case structure, and battery case structure, utmost point ear and soldering-assistant piece welding to one side that deviates from utmost point ear at the soldering-assistant piece forms and welds the seal, and the soldering-assistant piece is held including the first end that is close to the link and the second of keeping away from the link, welds the minimum distance between seal and the first end and is not more than the minimum distance of welding seal and second end.

The utility model discloses battery includes battery shell structure, electric core and helps the soldering lug, and electric core sets up in battery shell structure with helping the soldering lug, and electric core and battery shell structure electricity are connected. The welding-assisting sheets are connected to the lugs of the battery cell main body, so that the battery shell structure, the lugs and the welding-assisting sheets can be reliably welded, the welding thickness can be increased by the aid of the welding-assisting sheets, and the welding stability of the battery shell structure and the lugs is guaranteed. The welding mark on the soldering-assistant sheet comprises a first end close to the connecting end and a second end far away from the connecting end, and the minimum distance between the welding mark and the first end is not more than the minimum distance between the welding mark and the second end, so that the tensile capacity of the welding position of the battery shell structure, the lug and the soldering-assistant sheet can be improved, the connection strength of the battery shell structure and the lug is further improved, and the safety use performance of the battery is improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views.

Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partial structure of a battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partial structure of a battery according to another exemplary embodiment;

fig. 4 is a partial structural view illustrating a battery according to another exemplary embodiment.

The reference numerals are illustrated below:

10. a battery case; 11. a housing member; 12. a cover plate; 20. a pole column; 30. an electric core; 31. a cell main body; 32. a tab; 321. a connecting end; 322. a free end; 40. a soldering-assistant sheet; 41. welding and printing; 42. a first end; 43. a second end.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 4, the battery includes: a battery housing structure; the battery comprises a battery cell 30, the battery cell 30 is arranged in a battery shell structure, the battery cell 30 comprises a cell main body 31 and a tab 32, the tab 32 extends from the cell main body 31, and the tab 32 comprises a connecting end 321 connected with the cell main body 31 and a free end 322 far away from the cell main body 31; and the soldering assistant sheet 40, the electrode lug 32 is positioned between the soldering assistant sheet 40 and the battery shell structure, the electrode lug 32 and the soldering assistant sheet 40 are welded to form a welding mark 41 on the side of the soldering assistant sheet 40, which is far away from the electrode lug 32, wherein the soldering assistant sheet 40 comprises a first end 42, which is close to the connecting end 321, and a second end 43, which is far away from the connecting end 321, and the minimum distance between the welding mark 41 and the first end 42 is not more than the minimum distance between the welding mark 41 and the second end 43.

The utility model discloses a battery of embodiment includes battery housing structure, electric core 30 and helps soldering lug 40, and electric core 30 sets up in battery housing structure with helps soldering lug 40, and electric core 30 is connected with battery housing structure electricity. By connecting the soldering-assistant sheet 40 to the tab 32 of the cell main body 31, the battery shell structure, the tab 32 and the soldering-assistant sheet 40 can be reliably welded, and the welding thickness can be increased by the soldering-assistant sheet 40, so that the welding stability of the battery shell structure and the tab 32 is ensured. The welding mark 41 on the soldering assistant sheet 40 comprises a first end 42 close to the connecting end 321 and a second end 43 far away from the connecting end 321, and the minimum distance between the welding mark 41 and the first end 42 is not more than the minimum distance between the welding mark 41 and the second end 43, so that the tensile capacity of the welding position of the battery shell structure, the pole lug 32 and the soldering assistant sheet 40 can be improved, the connection strength of the battery shell structure and the pole lug 32 is further improved, and the safety use performance of the battery is improved.

It should be noted that, due to the existence of the soldering assistant sheet 40, the soldering assistant sheet 40 can achieve a reinforcing effect on the tab 32, so that after the battery case structure, the tab 32 and the soldering assistant sheet 40 are welded, the solder print of the battery case structure, the tab 32 and the soldering assistant sheet 40 can be relatively thick, so as to improve the tensile strength of the battery case structure, the tab 32 and the soldering assistant sheet 40, for example, a 90 ° tensile force of the solder print formed by the battery case structure, the tab 32 and the soldering assistant sheet 40 is significantly improved, the minimum distance between the solder print 41 and the first end 42 is not greater than the minimum distance between the solder print 41 and the second end 43, so as to further reduce a 90 ° pulling torque, thereby improving the maximum 90 ° tensile force that the solder print can bear, and improving the connection strength between the tab 32 and the battery case structure.

As shown in fig. 3 and 4, the tab 32 includes a connection end 321 connected to the cell main body 31 and a free end 322 far away from the cell main body 31, that is, the connection end 321 is one end extending from the cell main body 31, and the free end 322 is the other end of the tab 32 opposite to the connection end 321, and the soldering assistant fitting 40 includes a first end 42 close to the connection end 321 and a second end 43 far away from the connection end 321, that is, the second end 43 of the soldering assistant fitting 40 can be regarded as one end close to the free end 322.

In one embodiment, the battery case structure may include the battery case 10, and the tab 32 may be welded to the battery case 10, so that the battery case 10 may be used as an electrode lead-out terminal of a battery.

In one embodiment, as shown in fig. 1, the battery housing structure may include a battery housing 10 and a terminal post 20, wherein a battery core 30 is disposed in the battery housing 10, the terminal post 20 is disposed on the battery housing 10, a soldering-assistant tab 40 is disposed on a side of the terminal tab 32 facing away from the terminal post 20, and the terminal post 20, the terminal tab 32 and the soldering-assistant tab 40 are welded, so that the terminal post 20 may be used as an electrode leading-out terminal of a battery. The pole 20 and the battery case 10 may be insulated from each other.

In one embodiment, as shown in fig. 1, the battery case 10 includes: a housing member 11; the cover plate 12 is connected with the shell member 11 to seal the battery cell 30, and the pole 20 is arranged on the cover plate 12; the tab 32 extends from one side of the battery cell main body 31 toward the cover plate 12, so that the tab 32 and the terminal 20 can be conveniently welded, thereby improving the assembly efficiency of the battery.

The battery case 10 may include a cover plate 12 and a case member 11, and the case member 11 may have an opening, and the cover plate 12 covers the opening.

Alternatively, the battery case 10 may include two cover plates 12 and one case member 11, and the case member 11 may have two openings, and the two cover plates 12 block the two openings, respectively.

In one embodiment, as shown in fig. 1, the battery case 10 includes: a housing member 11; the cover plate 12 is connected with the shell part 11 to seal the battery core 30, and the pole 20 is arranged on the cover plate 12; the tab 32 may extend from a side of the cell main body 31 that does not face the cover plate 12, for example, the tab 32 may extend in a direction parallel to the cover plate 12.

Note that the battery includes the battery cell 30 and the electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell 30 refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.

The battery cell 30 may include two tabs 32, which are respectively an anode tab and a cathode tab, and the two terminals 20 may be connected to the anode tab and the cathode tab respectively. Alternatively, one of the terminal posts 20 may be provided, and one of the terminal posts 20 may be connected to one of the tab 32, and the other tab 32 may be connected to the battery case 10. Alternatively, the two tabs 32 may be connected to the cover plate 12 and the housing member 11, respectively, and in this case, the cover plate 12 and the housing member 11 may be insulated from each other.

The two tabs 32 on the cell main body 31 may extend from the same side of the cell main body 31, or the two tabs 32 on the cell main body 31 may extend from two opposite sides of the cell main body 31.

The battery core 30 can be a laminated battery core, which is convenient to assemble and can be processed to obtain a battery with a longer length, the battery core 30 has a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm piece arranged between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery core.

The battery cell 30 may also be a winding battery cell, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm disposed between the first pole piece and the second pole piece are wound to obtain the winding battery cell.

In one embodiment, the welding stamp 41 is located in the middle of the soldering assistant sheet 40, so that reliable welding quality between the tab 32 and the soldering assistant sheet 40 can be ensured, and the tab 32 is not easily damaged, thereby ensuring the welding quality between the battery shell structure and the tab 32.

The battery shell structure can comprise a pole post 20, the pole post 20, a pole lug 32 and a soldering-assistant sheet 40 which are welded, the pole post 20, the pole lug 32 and the soldering-assistant sheet 40 form an integral soldering stamp, and the soldering stamp 41 on the soldering-assistant sheet 40 can be regarded as a structure formed by welding seen on the soldering-assistant sheet 40, but in the embodiment, the soldering stamp 41 is positioned in the middle of the soldering-assistant sheet 40, namely the soldering-assistant sheet 40 can realize reliable protection of the pole lug 32, so that the welding quality between the pole lug 32 and the pole post 20 is ensured.

The welding mark 41 is located in the middle of the soldering-assistant tab 40, that is, welding energy needs to pass through the soldering-assistant tab 40 during the welding of the pole 20, the pole ear 32 and the soldering-assistant tab 40, so that the soldering-assistant tab 40 can protect the pole ear 32.

In one embodiment, the minimum distance between the solder stamp 41 and the first end 42 is 0.05mm to 10mm, and on the basis of ensuring that the solder stamp 41 is located in the middle of the soldering assistant tab 40, the solder stamp 41 can also ensure a reliable area, so as to ensure the welding quality of the pole 20, the pole ear 32 and the soldering assistant tab 40.

When welding minimum distance between seal 41 and the first end 42 and being less than 0.05mm, can more easily directly pierce through utmost point ear 32 among the welding process, cause the damage to utmost point ear 32 easily, and when welding minimum distance between seal 41 and the first end 42 is greater than 10mm, not only be difficult to guarantee utmost point post 20, utmost point ear 32 and the welding quality who helps soldering lug 40, and it can be relatively less to form to weld seal 41, hardly reach utmost point post 20, utmost point ear 32 and the joint strength who helps soldering lug 40.

The minimum distance between the solder stamp 41 and the first end 42 may be 0.05mm, 0.08mm, 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 9.8mm, 9.9mm, or 10mm, etc.

In one embodiment, the minimum distance between the solder print 41 and the second end 43 is 0.05mm to 10mm, and on the basis of ensuring that the solder print 41 is located in the middle of the soldering assistant tab 40, the solder print 41 can also ensure a reliable area, so as to ensure the welding quality of the pole 20, the pole ear 32 and the soldering assistant tab 40.

The minimum distance between the solder stamp 41 and the second end 43 may be 0.05mm, 0.08mm, 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 9.8mm, 9.9mm, or 10mm, etc.

In one embodiment, the tab 32 and the soldering assistant sheet 40 are made of the same material, so as to facilitate the welding of the tab 32 and the soldering assistant sheet 40, thereby ensuring that a good welding mark can be formed between the tab 32 and the soldering assistant sheet 40, and thus ensuring the welding quality of the tab 32 and the soldering assistant sheet 40.

The material of the tab 32 and the soldering assistant sheet 40 may be a metal material such as copper, aluminum, steel, etc., and is not limited herein.

In one embodiment, the battery casing structure may include a terminal post 20, the tab 32 and the soldering-assistant tab 40 are welded, and at least a portion of the terminal post 20, the tab 32 and the soldering-assistant tab 40 are made of the same material, so as to ensure reliable welding quality of the terminal post 20, the tab 32 and the soldering-assistant tab 40. The post 20 may be made of a single material, or the post 20 may be made of at least two materials, for example, the post 20 may include at least one of copper, aluminum, and steel.

In one embodiment, the battery case structure may include the battery case 10, the tab 32 and the soldering assistant tab 40 are welded, and at least a portion of the battery case 10, the tab 32 and the soldering assistant tab 40 are made of the same material, so as to ensure reliable welding quality of the battery case 10, the tab 32 and the soldering assistant tab 40. The battery case 10 may be made of a single material, or the battery case 10 may be made of at least two materials, for example, the battery case 10 may include at least one of copper, aluminum, and steel.

In one embodiment, the thickness of the soldering assistant sheet 40 is 0.05 mm-0.3 mm, so that the soldering assistant sheet 40 can protect the tab 32, and the welding quality is not affected by the excessive thickness of the soldering assistant sheet 40.

When the thickness of the soldering-assistant sheet 40 is less than 0.05mm, the damage of the pole lug 32 is easily caused in the welding process, and when the thickness of the soldering-assistant sheet 40 is more than 0.3mm, the connection strength of the pole lug 32 and the soldering-assistant sheet 40 is difficult to ensure in the welding process, and the energy required by welding can be increased, so that the welding quality is not favorably improved.

The thickness of the soldering tip 40 may be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, or the like.

In one embodiment, the tab 32 comprises a plurality of single tabs, the number of the plurality of single tabs is 10-100, and the side of the cell body 31 provided with the tab 32 is spaced from the battery casing structure, so that a certain space is provided between the portion of the battery casing 10 provided with the terminal 20 and the cell body 31, thereby facilitating the connection between the tab 32 and the terminal 20.

The number of the single tabs is 10-100, so that the tabs 32 can have a certain thickness, and therefore, the tabs 32 can have enough overcurrent capacity.

In one embodiment, the welding stamp 41 is a laser welding stamp, that is, the battery case structure, the tab 32 and the soldering assistant sheet 40 can be welded by laser, so as to ensure reliable connection among the battery case structure, the tab 32 and the soldering assistant sheet 40 and improve the connection strength among the battery case structure, the tab 32 and the soldering assistant sheet 40.

In one embodiment, an ultrasonic welding mark is formed between the tab 32 and the soldering assistant sheet 40, and the ultrasonic welding mark is covered by the laser welding mark, so that the tab 32 and the soldering assistant sheet 40 are not excessively damaged during laser welding, thereby ensuring the welding quality of the battery case structure, the tab 32 and the soldering assistant sheet 40.

The ultrasonic welding mark is formed between the pole lug 32 and the welding-assistant sheet 40 through ultrasonic welding, and laser welding is carried out on the ultrasonic welding mark subsequently, so that the laser welding mark is formed, the intensity of the pole lug 32 and the welding-assistant sheet 40 is increased due to the ultrasonic welding mark, so that the probability of damage to the pole lug 32 is greatly reduced during laser welding, and the welding quality of the battery shell structure, the pole lug 32 and the welding-assistant sheet 40 can be ensured.

A plurality of monolithic utmost point ears of utmost point ear 32 and help soldering lug 40 can carry out prewelding through the ultrasonic wave to combine together a plurality of monolithic utmost point ears with help soldering lug 40, also improved utmost point ear 32's structural strength to a certain extent, be about to each monolithic utmost point ear in utmost point ear 32 and all combine together, utmost point ear 32's intensity is higher, thereby when welding utmost point ear 32 and utmost point post 20, even welded energy is great relatively, also is difficult for causing the damage to utmost point ear 32. The ultrasonic welding may be a button or square tooth or spark + helical tooth horn.

It should be noted that the single tab may be a metal sheet, the metal sheet is a metal sheet, and the metal sheet may be a part of the current collector, or there may be other options, and the details are not limited herein.

The pre-welding between the tab 32 and the weld aid 40 may also be performed by other welding methods, such as laser welding or resistance welding, etc., while the welding between the battery case structure, the tab 32, and the weld aid 40 may also be performed by other welding methods, such as ultrasonic welding or resistance welding, etc.

In one embodiment, the area of the soldering-assistant sheet 40 is 0.5-1.5 times of the ultrasonic welding area, so that a reliable connection area can be formed between the single tabs forming the tab 32, thereby improving the subsequent resistance to laser welding and ensuring the overcurrent capacity of the subsequent tab 32.

The area of the soldering aid 40 may be 0.5 times, 0.6 times, 0.7 times, 0.8 times, 1 times, 1.1 times, 1.2 times, 1.3 times, 1.4 times, 1.5 times, etc. the area of the ultrasonic solder mark.

In one embodiment, the area of the soldering aid tabs 40 is not greater than the area of the ultrasonic weld; wherein, the ultrasonic welding seal covers the whole of the soldering-assistant sheet 40, thereby ensuring that the soldering-assistant sheet 40 and the pole lug 32 have reliable and combining ability, facilitating the subsequent laser welding seal formation, not damaging the pole lug 32, and ensuring that the pole lug 32 and the pole post 20 have enough overcurrent capacity.

In one embodiment, all of the flux tabs 40 are located on the tab 32, so that the flux tabs 40 can be ensured to protect the tab 32 to the maximum extent, thereby improving the connection strength between the tab 32 and the pole 20.

In one embodiment, the battery cells 30 may be at least two, the tabs 32 of at least two battery cells 30 may share one soldering lug 40, and the tabs 32 of at least two battery cells 30 may be welded with one soldering lug 40.

For example, as shown in fig. 2, there may be two battery cells 30, each battery cell 30 may include two tabs 32, and two opposing tabs 32 of each battery cell 30 may share one soldering-assistant tab 40, that is, one soldering-assistant tab 40 may be disposed on a tab 32 of one battery cell 30, so as to implement connection of two battery cells 30, and two battery cells 30 may share a pole 20.

A soldering aid 40 may be disposed on a tab 32 of a battery cell 30, the tab 32 including a connecting end 321 connected to the cell body 31 and a free end 322 far from the cell body 31, wherein a side of the soldering aid 40 facing away from the tab 32 forms a solder mark 41, the soldering aid 40 includes a first end 42 close to the connecting end 321 and a second end 43 far from the connecting end 321, and a minimum distance between the solder mark 41 and the first end 42 is not greater than a minimum distance between the solder mark 41 and the second end 43.

The distance relationship between the welding mark 41 formed by the soldering assistant sheet 40 and the tab 32 of another electrical core 30 is not limited here, and the present embodiment is based on the tab 32 directly contacting with the soldering assistant sheet 40. For example, the soldering assistant tab 40 is not in direct contact with the tab 32 of another battery cell 30, the tab 32 of another battery cell 30 includes a connecting end 321 connected with the battery cell main body 31 and a free end 322 far away from the battery cell main body 31, in this case, a side of the soldering assistant tab 40 facing away from the tab 32 forms a solder mark 41, the soldering assistant tab 40 includes a first end 42 close to the connecting end 321 and a second end 43 far away from the connecting end 321, and a minimum distance between the solder mark 41 and the first end 42 may be equal to a minimum distance between the solder mark 41 and the second end 43, or a minimum distance between the solder mark 41 and the first end 42 may be smaller than a minimum distance between the solder mark 41 and the second end 43.

For example, as shown in fig. 2, the number of the soldering assistant tabs 40 may be two, and the two soldering assistant tabs 40 are respectively in contact with the two tabs 32 of one cell 30, in which case, the size and the position of the soldering assistant tab 41 may not be the same, or the size and the position of the soldering assistant tab 41 may be substantially the same, but it is further ensured that the tab 32 in contact with the soldering assistant tab 40 is taken as a reference, the tab 32 includes a connecting end 321 connected with the cell main body 31 and a free end 322 far from the cell main body 31, the soldering assistant tab 40 includes a first end 42 close to the connecting end 321 and a second end 43 far from the connecting end 321, and the minimum distance between the soldering assistant tab 41 and the first end 42 is not greater than the minimum distance between the soldering assistant tab 41 and the second end 43.

In some embodiments, as shown in fig. 3, the battery cells 30 may also be one, and the tab 32 of one battery cell 30 may be connected to the corresponding soldering lug 40.

It should be noted that the battery may be a square battery, that is, the battery may be a quadrangular battery, and the quadrangular battery mainly refers to a prismatic battery whose shape is a straight line without strictly limiting whether each side of the prism is a strict straight line, and a corner between sides is not necessarily a right angle, and may be an arc transition.

In certain embodiments, it is not excluded that the battery may be a cylindrical battery.

An embodiment of the utility model also provides a group battery, and the group battery includes foretell battery.

The utility model discloses the battery of group battery of an embodiment includes battery case structure, electric core 30 and helps soldering lug 40, and electric core 30 sets up in battery case structure with helping soldering lug 40, and electric core 30 is connected with battery case structure electricity. By connecting the soldering-assistant pieces 40 to the tabs 32 of the battery cell main body 31, the battery shell structure, the tabs 32 and the soldering-assistant pieces 40 can be reliably welded, and the soldering-assistant pieces 40 can increase the welding thickness, so that the welding stability of the battery shell structure and the tabs 32 is ensured. The welding mark 41 on the soldering assistant sheet 40 comprises a first end 42 close to the connecting end 321 and a second end 43 far away from the connecting end 321, and the minimum distance between the welding mark 41 and the first end 42 is not more than the minimum distance between the welding mark 41 and the second end 43, so that the tensile capacity of the welding position of the battery shell structure, the pole lug 32 and the soldering assistant sheet 40 can be improved, the connecting strength of the battery shell structure and the pole lug 32 is improved, and the safety use performance of the battery pack is improved.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.

It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery, comprising:

a battery housing structure;

the battery cell (30) is arranged in the battery shell structure, the battery cell (30) comprises a cell main body (31) and tabs (32), the tabs (32) extend out of the cell main body (31), and the tabs (32) comprise connecting ends (321) connected with the cell main body (31) and free ends (322) far away from the cell main body (31);

soldering-assistant sheet (40), utmost point ear (32) are located soldering-assistant sheet (40) with between the battery case structure, the battery case structure utmost point ear (32) and soldering-assistant sheet (40) welding, with soldering-assistant sheet (40) deviate from one side formation soldering print (41) of utmost point ear (32), soldering-assistant sheet (40) are including being close to first end (42) of link (321) and keeping away from second end (43) of link (321), soldering print (41) with minimum distance between first end (42) is not more than soldering print (41) with the minimum distance of second end (43).

2. The battery according to claim 1, characterized in that the weld mark (41) is located in the middle of the soldering aid sheet (40), and/or all of the soldering aid sheet (40) is located on the tab (32).

3. The battery according to claim 1, characterized in that the minimum distance between the solder stamp (41) and the first end (42) is between 0.05mm and 10mm.

4. The battery according to claim 1, wherein the tab (32) and the soldering-assistant tab (40) are made of the same material.

5. The battery according to claim 1, wherein the thickness of the soldering aid tabs (40) is 0.05mm to 0.3mm.

6. The battery of claim 1, wherein the tab (32) comprises a plurality of single-piece tabs, the number of the plurality of single-piece tabs is 10-100, and the side of the cell body (31) on which the tab (32) is disposed is spaced from the battery case structure.

7. The battery according to claim 1, characterized in that the solder print (41) is a laser solder print;

an ultrasonic welding mark is further formed between the lug (32) and the soldering-assistant sheet (40), the ultrasonic welding mark is covered by the laser welding mark, and the area of the soldering-assistant sheet (40) is 0.5-1.5 times of the area of the ultrasonic welding mark.

8. The battery according to claim 7, wherein the area of the soldering aid tabs (40) is not larger than the area of the ultrasonic solder mark;

wherein the ultrasonic weld covers the entirety of the weld aid tabs (40).

9. The battery according to claim 1, characterized in that the number of cells (30) is one, or the number of cells (30) is at least two.

10. The battery of any of claims 1-9, wherein the battery housing structure comprises:

a battery housing (10), the battery cell (30) being disposed within the battery housing (10);

utmost point post (20), utmost point post (20) set up in on battery housing (10), soldering-assistant piece (40) set up in utmost point ear (32) deviate from one side of utmost point post (20), utmost point ear (32) and soldering-assistant piece (40) welding.

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