CN219267835U - Battery and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a battery and a battery device; the battery comprises a battery shell, wherein a reinforcing structure is arranged on the battery shell, a weak part is arranged around the periphery of the reinforcing structure, the weak part comprises an opening part, and the reinforcing structure and the weak part are arranged at intervals. The battery can form a required weak part, and the high-temperature gas can smoothly break through the weak part, so that the safety of the battery is ensured; the thickness consistency of the weak part is ensured, the situation that the weak part is too weak and the breakage failure occurs is avoided, and the product yield is improved; the explosion-proof function of the weak part and the strengthening function of the strengthening structure are ensured, so that each function of the battery is ensured.

Description

Battery and battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery and a battery device comprising the battery.

Background

The lithium ion battery as a novel secondary battery has the advantages of high energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large energy storage, electric traffic power sources and the like.

However, the battery case of the conventional battery is liable to be abnormally exploded.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to a battery and a battery device including the battery, which overcomes the disadvantage that the battery case of the related art is prone to abnormal explosion.

According to one aspect of the present disclosure, there is provided a battery including:

the battery case is provided with a reinforcing structure thereon, a weak portion is provided around the outer periphery of the reinforcing structure, the weak portion includes an opening portion, and the reinforcing structure is disposed at an interval from the weak portion.

According to the battery disclosed by the utility model, on one hand, the weak part is arranged around the periphery of the reinforcing structure, so that the reinforcing structure can strengthen the area surrounded by the weak part, the strength of the battery shell is ensured, and the safety of the battery is ensured; on the other hand, the weak part comprises an opening part, namely the weak part is arranged to be of a non-closed structure, and when the weak part is formed by stamping, the junction is avoided, so that materials generated after stamping and thinning can be timely extruded to the periphery, the required weak part can be formed, the weak part can be smoothly broken by high-temperature gas, and the safety of the battery is ensured; when the weak part is formed by removing a part of solid material of the bottom plate, namely, the processing of secondarily removing the material of a part of the weak part is avoided, the thickness consistency of each part of the weak part is ensured, the situation that the part is too weak and breaks and fails is avoided, and the product yield is improved; in still another aspect, the weak portion and the reinforcing structure are arranged at intervals, so that the weak portion and the reinforcing structure are prevented from generating an intersection, the reinforcing structure is prevented from being influenced when the weak portion is formed, the weak portion is prevented from being influenced when the reinforcing structure is formed, the explosion-proof function of the weak portion and the reinforcing function of the reinforcing structure are guaranteed, and various functions of the battery are guaranteed.

According to another aspect of the present disclosure, there is provided a battery device including: the battery described above.

According to the battery device, on one hand, the weak part is arranged around the periphery of the reinforcing structure, so that the reinforcing structure can strengthen the area surrounded by the weak part, the strength of the battery shell is ensured, and the safety of the battery and the battery device is ensured; on the other hand, the weak part comprises an opening part, namely the weak part is arranged to be in a non-closed structure, and when the weak part is formed by stamping, the junction is avoided, so that materials generated after stamping and thinning can be timely extruded to the periphery, the required weak part can be formed, the weak part can be smoothly broken by high-temperature gas, and the safety of a battery and a battery device is ensured; when the weak part is formed by removing a part of solid material of the bottom plate, namely, the processing of secondarily removing the material of a part of the weak part is avoided, the thickness consistency of each part of the weak part is ensured, the situation that the part is too weak and breaks and fails is avoided, and the product yield is improved; in still another aspect, the weak portion and the reinforcing structure are arranged at intervals, so that the weak portion and the reinforcing structure are prevented from generating an intersection, the reinforcing structure is prevented from being influenced when the weak portion is formed, the weak portion is prevented from being influenced when the reinforcing structure is formed, the explosion-proof function of the weak portion and the reinforcing function of the reinforcing structure are guaranteed, and various functions of the battery and the battery device are guaranteed.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural view of an example embodiment of a battery of the present disclosure.

Fig. 2 is a schematic structural view of the base plate in fig. 1.

Fig. 3 is a schematic cross-sectional view of the latter example embodiment taken along line A-A in fig. 2.

Fig. 4 is a schematic cross-sectional view of another example embodiment taken along line A-A in fig. 2.

Fig. 5 is a schematic cross-sectional view of still another example embodiment, taken along line A-A in fig. 2.

Reference numerals illustrate:

1. a battery case;

11. a weak portion; 111. an opening portion; 1111. an open end; 112. a groove;

12. a reinforcing structure; 121. an end portion; 122. a reinforcing part;

13. a first face; 14. a second face; 15. a recessed portion; 16. a protruding structure; 17. a cover plate; 18. a side plate; 19. a bottom plate; 191. a concave portion;

2. a battery post;

x, a first direction; y, second direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present application, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The present disclosure provides a battery, which may include a battery case 1, a reinforcing structure 12 provided on the battery case 1, a weak portion 11 provided around the outer circumference of the reinforcing structure 12, and the weak portion 11 may include an opening 111, and the reinforcing structure 12 is spaced apart from the weak portion 11, as shown in fig. 1 to 4.

In the present exemplary embodiment, referring to fig. 1, the battery may be a cylindrical battery, and thus, the battery case 1 may be provided in a cylindrical shape, that is, the battery case 1 may include a cap plate 17 and a base plate 19 which are disposed opposite to each other, each of the cap plate 17 and the base plate 19 being provided in a circular shape, a side plate 18 being connected between the cap plate 17 and the base plate 19, the side plate 18 being provided in a cylindrical shape. The side plates 18, the cover plate 17 and the bottom plate 19 surround an accommodation space for forming a battery. The cover plate 17 and the bottom plate 19 are end faces of the cylindrical battery.

Of course, in other example embodiments of the present disclosure, the bottom plate 19 and the cover plate 17 may be provided in a rectangular shape, an oval shape, a trapezoid shape, etc., and the side plates 18 may be provided in one or more and surround to form a rectangular shape, an oval shape, a trapezoid shape, etc., such that the battery case 1 is formed in a rectangular shape, an oval cylindrical shape, a prismatic shape, etc. The battery case 1 may have other shapes, and will not be described in detail herein.

In the present exemplary embodiment, an electrical cell is arranged in the receiving space of the battery housing 1, the electrical cell being arranged as a cylinder adapted to the battery housing 1. The battery cell may include a positive electrode tab and a negative electrode tab (not shown), and a separator disposed between the positive electrode tab and the negative electrode tab.

The battery may further include a positive tab and a negative tab (not shown). The positive electrode lug is connected with the battery core, specifically, the positive electrode lug is connected with the positive electrode plate; the positive electrode lug is positioned on one side of the battery cell close to the cover plate 17, namely, the positive electrode lug is positioned on one side of the battery cell close to the battery pole 2. The negative electrode lug is connected with the battery cell, specifically, the negative electrode lug is connected with the negative electrode plate; the negative electrode tab and the positive electrode tab are located on the same side of the battery cell, that is, the negative electrode tab is located on the side of the battery cell close to the cover plate 17, that is, the negative electrode tab is located on the side of the battery cell close to the battery post 2. Of course, the positive tab and the negative tab may also be located on opposite sides of the cell.

A battery pole 2 is arranged on one side of the battery core, which is close to the cover plate 17, and the positive lug is connected with the battery pole 2; the battery post 2 protrudes from the battery case 1 through a first through hole in the cover 17 to form the positive electrode of the battery. And the negative electrode tab may be connected to the battery case 1, the battery case 1 forming the negative electrode of the battery. The positive electrode and the negative electrode of the battery thus arranged are led out from the same side. Therefore, the battery post 2 needs to be connected to the battery case 1 in an insulating manner, and in particular, the battery post 2 is connected to the cap plate 17 in an insulating manner. Of course, the battery post 2 may be the negative electrode of the battery, and the battery case 1 may be the positive electrode of the battery.

The electric core is likely to generate thermal runaway, a large amount of high-temperature gas can be generated when the electric core is in thermal runaway, if the high-temperature gas can not be discharged in time, explosion can be caused to the battery, surrounding batteries and parts are affected, and safety accidents can be caused when serious. Therefore, the weak portion 11 is provided on the battery case 1, and when the battery cells are thermally out of control, the generated high-temperature gas breaks the weak portion 11 and is timely discharged through the weak portion 11, so that explosion of the battery is avoided.

In order to avoid that the weak portion 11 is abnormally burst due to the damage of a part of the battery case 1 where the weak portion 11 is provided, the reinforcing structure 12 is provided, and the reinforcing structure 12 can improve the strength of the battery case 1, but the weak portion 11 and the reinforcing structure 12 are easily interfered with each other, so that the local stress concentration of the battery case 1 is caused, and the abnormal burst is easily caused.

In the present exemplary embodiment, the weak portion 11 may be provided on the bottom plate 19, and at the same time, the reinforcing structure 12 may be provided on the bottom plate 19. Of course, the weaknesses 11 and the reinforcing structures 12 can also be provided on the cover 17, and the weaknesses 11 and the reinforcing structures 12 can also be provided on the side panels 18.

The following description will be given by taking an example in which the weakened portions 11 and the reinforcing structures 12 are provided on the bottom plate 19.

Referring to fig. 2 and 3, the battery case 1 has a first face 13 and a second face 14 disposed opposite to each other, and in particular, the bottom plate 19 may include the first face 13 and the second face 14 disposed opposite to each other, the first face 13 being an outer surface, the outer surface being a surface facing away from the battery cell; the second face 14 is an inner surface, which is the surface that is adjacent to the cell. The frangible portion 11 may be a groove 112 provided in the base 19, and in particular the frangible portion 11 may be a groove 112 provided in the first face 13. The frangible portion 11 may be formed by stamping, specifically, stamping the base plate 19 from the first face 13 of the base plate 19 to form the frangible portion 11; such that the weakening 11 is a groove 112 provided in the first side 13 and the side of the weakening 11 facing away from the first side 13 is provided with a protruding structure 16, i.e. the first side 13 of the bottom plate 19 is provided with a groove 112 and the second side 14 of the bottom plate 19 is provided with a protruding structure 16. The thickness of the cover plate 17 at the weak part 11 is thinned through stamping, when thermal runaway occurs in the battery cell, the generated high-temperature gas can burst the weak part 11, and the gas is timely discharged through the weak part 11, so that explosion of the battery is avoided. Of course, the frangible portion 11 may be a groove 112 provided in the second face 14.

Referring to fig. 2 and 3, the reinforcing structure 12 may be a protrusion provided on the bottom plate 19, and in particular, the reinforcing structure 12 may be a protrusion provided on the first face 13. The reinforcing structure 12 may also be formed by stamping, specifically stamping the base plate 19 from the second face 14 of the base plate 19 to form the reinforcing structure 12; so that the reinforcing structure 12 protrudes towards the first side 13 and that the reinforcing structure 12 is provided with a recess 15 on the side facing away from the first side 13, i.e. a protrusion is formed on the first side 13 of the bottom plate 19 and a recess 15 is formed on the second side 14 of the bottom plate 19. The side wall of the reinforcing structure 12 formed by punching corresponds to a reinforcing rib, and the strength of the cover 17 can be increased. Of course, the reinforcing structure 12 may be a protrusion disposed on the second face 14.

In the case where the weakened portion 11 and the reinforcing structure 12 are both formed by punching, the protruding direction of the weakened portion 11 is opposite to the protruding direction of the reinforcing structure 12. When the weak part 11 and the reinforcing structure 12 are formed by punching, a certain extrusion effect is exerted on the material of the bottom plate 19, and the protruding direction of the weak part 11 is opposite to the protruding direction of the reinforcing structure 12, so that when the weak part 11 and the reinforcing structure 12 are formed, the punching direction is opposite, the stress concentration generated by extruding the bottom plate 19 from the same direction is avoided, namely, the stress generated by punching is reduced, and the strength of the bottom plate 19 is prevented from being influenced.

As shown with reference to fig. 3, moreover, the protruding height H1 of the protruding structure 16 is greater than the protruding height H2 of the reinforcing structure 12; the protruding height H1 of the protruding structure 16 is 0.02mm or more and 2mm or less, and the protruding height H2 of the reinforcing structure 12 is 0.03m or more and 3mm or less. The protruding height H1 of the protruding structure 16 is designed to be higher, so that the thickness of the cover plate 17 at the protruding structure 16 is reduced, and when the battery cell is in thermal runaway, the generated high-temperature gas can break the weak part 11; the protruding height H2 of the reinforcing structure 12 is designed to be low so that the thickness of the cover plate 17 at the reinforcing structure 12 is not substantially reduced, so that the reinforcing structure 12 has an effect of increasing the strength of the bottom plate 19, and the high temperature gas generated when the thermal runaway of the battery cells occurs does not break the reinforcing structure 12.

In addition, in other example embodiments of the present disclosure, referring to fig. 4, the weak portion 11 may be formed by removing a portion of the solid material of the base plate 19, specifically, may be formed by laser ablation, or may be formed by chemical etching, or may be formed by a mechanical cutting process. In this case, the weakened portion 11 is a groove 112 provided in the first surface 13, and a portion of the second surface 14 opposite to the weakened portion 11 is a flat surface. Also, the thickness of the cover plate 17 at the weak portion 11 is reduced, and when thermal runaway occurs in the battery cell, the generated high-temperature gas breaks the weak portion 11 and is timely discharged through the weak portion 11, so that explosion of the battery is avoided.

Of course, as shown with reference to fig. 5, grooves 112 may be provided in both the first and second faces 13, 14, with the grooves 112 of the first face 13 being disposed opposite the grooves 112 of the second face 14, the two oppositely disposed grooves 112 forming the frangible portion 11.

In other example embodiments of the present disclosure, the reinforcing structure 12 may be a solid structure provided on the base plate 19, and the reinforcing structure 12 may be integrally connected with the base plate 19 by welding or bonding.

Referring to fig. 2, the weak portion 11 is at least semi-enclosed, so that the weak portion 11 is provided with an opening 111, and the weak portion 11 surrounds a region. The semi-enclosed structure means that two or more continuous edges are sealed. In the case where the weak portion 11 is provided in the shape of a circular arc, the weak portion 11 is provided in at least a semicircular arc; in the case where the weak portion 11 is provided in a rectangular shape, the weak portion 11 includes at least two connected grooves 112, and an included angle is formed between the two grooves 112.

In the present exemplary embodiment, the weak portion 11 is provided in an arc shape, and the central angle corresponding to the weak portion 11 is greater than 180 degrees, that is, the weak portion 11 is provided in a more or less semicircular arc shape, so that the weak portion 11 is formed with the opening portion 111. Of course, in other exemplary embodiments of the present disclosure, the weak portion 11 may be provided in a shape of a mostly elliptic arc, various regular or irregular semi-enclosed curves, and the weak portion 11 is also formed with the opening portion 111; it may also be a rectangle or various polygons having an opening 111.

When the weak part 11 is formed by stamping, the junction is avoided, and materials generated after stamping and thinning can be timely extruded to the periphery relative to the weak part 11 of the closed structure, so that the problem that the materials cannot be timely extruded to the periphery, so that the required weak part 11 cannot be formed, and the weak part 11 cannot be smoothly broken by high-temperature gas is avoided; when the weak portion 11 is formed by removing a part of the solid material of the bottom plate 19, the occurrence of an intersection is avoided, namely, the processing of secondarily removing the material from a part of the weak portion 11 is avoided, the thickness uniformity of the whole part of the weak portion 11 is ensured, and the occurrence of the situation of overweak and fracture failure is avoided.

The weakening 11 is arranged around the periphery of the reinforcing structure 12, i.e. the reinforcing structure 12 is located within the area surrounded by the weakening 11, and the reinforcing structure 12 arranged within the area surrounded by the weakening 11 may strengthen the bottom plate 19 within the area surrounded by the weakening 11.

The weaknesses 11 are spaced from the reinforcing structure 12, i.e. the weaknesses 11 are not connected to the reinforcing structure 12. Further, the opening end 1111 of the weakened portion 11 forming the opening 111 is spaced apart from the reinforcing structure 12.

The minimum distance between the weakened portion 11 and the reinforcing structure 12 is 0.5mm or more and 3mm or less, for example, the minimum distance may be 0.5mm, 0.8mm, 1.2mm, 1.5mm, 1.75mm, 2mm, 2.2mm, 2.65mm, 2.86mm, or the like.

When the weakened portion 11 and the reinforcing structure 12 are formed by punching, the weakened portion 11 and the reinforcing structure 12 are prevented from meeting. Since the weakened portion 11 and the reinforcing structure 12 are formed by punching from opposite directions, if the weakened portion 11 and the reinforcing structure 12 form a junction, the junction is punched once from the first face 13 side and once from the second face 14 side, resulting in neither the weakened portion 11 nor the reinforcing structure 12 being formed at the junction; and multiple presses can result in stress concentrations that affect the strength of the bottom plate 19.

Further, if the distance between the weakened portion 11 and the reinforcing structure 12 is small, the region between the weakened portion 11 and the reinforcing structure 12 receives not only the pulling force toward the first surface 13 but also the pulling force toward the second surface 14, resulting in a reduction in thickness of the region between the weakened portion 11 and the reinforcing structure 12, and even more likely to cause fracture failure.

In forming the weakened portion 11 by removing a part of the solid material of the bottom plate 19 and forming the reinforcing structure 12 by punching, since the thickness of the portion where the weakened portion 11 is formed has been thinned, the thickness of the junction with the weakened portion 11 is made thinner by further punching, and even a fracture failure occurs.

Moreover, if the distance between the weakened portion 11 and the reinforcing structure 12 is small, the region between the weakened portion 11 and the reinforcing structure 12 is also subjected to a pulling force generated by punching, resulting in a reduction in thickness of the region between the weakened portion 11 and the reinforcing structure 12, and even more, a fracture failure.

The reinforcing structure 12 has at least two end portions disposed along a first direction X, which is an extending direction of the reinforcing structure 12, at least one end portion being disposed opposite to the opening portion 111 of the weak portion 11.

Any processing process and processing equipment have a certain error, if both end portions 121 of the reinforcing structure 12 are disposed opposite to the weak portion 11, the reinforcing structure 12 may easily generate an intersection with the weak portion 11 due to the error or may be close to the weak portion 11, and thus the distance between the reinforcing structure 12 and the weak portion 11 may not be satisfied. One end 121 of the reinforcing structure 12 is disposed opposite to the opening 111 of the weak portion 11, so that the reinforcing structure 12 can be processed as close to the opening 111 as possible under the condition of ensuring design requirements during processing, namely, the opening 111 is used as a fault tolerant area, even if errors of processing technology and processing equipment exist, an intersection area can not be generated between the reinforcing structure 12 and the weak portion 11, and the distance between the reinforcing structure 12 and the weak portion 11 meets the requirements.

By disposing the one end portion 121 of the reinforcing structure 12 opposite to the opening portion 111 of the weak portion 11, the error can be adjusted and compensated in the extending direction of the reinforcing structure 12.

The width of the reinforcing structure 12 is smaller than the width of the opening 111 in the second direction Y, which is perpendicular to the first direction X.

In order to secure the coverage area of the reinforcing structure 12, the width of the reinforcing structure 12 in the second direction Y is set as large as possible, but the minimum distance between the reinforcing structure 12 and the weakened portion 11 needs to be satisfied, so the width S of the reinforcing structure 12 is smaller than the width K of the opening 111.

Specifically, the difference between the width S of the reinforcing structure 12 and the width K of the opening 111 is 2mm or more and 8mm or less, and since the reinforcing structure 12 is symmetrically disposed, the distance between the end 121 of the reinforcing structure 12 and the opening end 1111 of the opening 111 formed by the weak portion 11 is 1 mm or more and 4 mm or less.

Referring to fig. 2, the reinforcing structure 12 may be configured to include two reinforcing portions 122 with inferior arcs, that is, the reinforcing portions 122 are configured to be arc shapes with less semicircle, and the central angle corresponding to the reinforcing portions 122 is smaller than 180 degrees, so that the area of the bottom plate 19 occupied by the reinforcing portions 122 is larger, and the effect of increasing the strength of the reinforcing structure 12 on the bottom plate 19 is ensured. Of course, in other exemplary embodiments of the present disclosure, the reinforcement portion 122 may be provided in a straight line shape, may be provided in a curved shape of any shape, and may be an arc-shaped curve or a straight line-shaped curve (fold line), or may be formed by connecting an arc-shaped curve and a straight line-shaped curve.

Further, the two reinforcing portions 122 may be disposed in a crossing manner, and since the two reinforcing portions 122 are formed by the same stamping process, even if the two reinforcing portions 122 are disposed in a crossing manner, the crossing portions are formed by the same stamping process, for example, the structures on the stamping die are disposed in a crossing manner, and the defects such as the excessive thickness, the concentrated stress, etc. of the reinforcing structure 12 caused by the multiple stamping do not occur.

In addition, the reinforcing portion 122 may be provided in more number, and two or more reinforcing portions 122 may be provided in parallel.

In addition, the battery case 1 has a first face 13 and a second face 14 disposed opposite to each other, and specifically, the bottom plate 19 may include the first face 13 and the second face 14 disposed opposite to each other, the first face 13 being an outer surface, and the second face 14 being an inner surface. An annular concave part 191 is further arranged on the bottom plate 19, specifically, a concave part 191 is arranged on the first surface 13, and the concave part 191 is arranged around the periphery of the weak part 11 and is positioned in the outer edge of the first surface 13; the strength of the peripheral region of the weakened portion 11 of the bottom plate 19 can be increased by the concave portion 191; and the concave part 191 can contain adhesive glue, so that the battery and the battery box are firmly adhered; an electrolyte may be contained in the area between the recess 191 and the outer edge of the first face 13.

Based on the same inventive concept, the exemplary embodiments of the present disclosure provide a battery device, which may include the battery described in any one of the above, and the specific structure of the battery has been described in detail above, so that the description thereof is omitted herein.

It should be noted that, the battery device includes other necessary components and compositions besides the battery, such as a battery box, a circuit board, a control component, and the like, and those skilled in the art can correspondingly supplement the components and the components according to the specific use requirements of the battery device, which is not described herein.

The battery and the battery device disclosed by the utility model are characterized in that on one hand, the weak part 11 is arranged around the periphery of the reinforcing structure 12, so that the reinforcing structure 12 can strengthen the area surrounded by the weak part 11 to ensure the strength of the battery shell 1 and the safety of the battery and the battery device; on the other hand, the weak portion 11 comprises an opening 111, namely the weak portion 11 is arranged to be of a non-closed structure, when the weak portion 11 is formed by punching, an intersection is avoided, so that materials generated after punching and thinning can be timely extruded to the periphery, the required weak portion 11 can be formed, high-temperature gas can smoothly break through the weak portion 11, and safety of a battery and a battery device is guaranteed; when the weak part 11 is formed by removing a part of solid material of the bottom plate 19, namely, the processing of secondarily removing the material of a part of the weak part 11 is avoided, the thickness consistency of the weak part 11 is ensured, the situation of overweak part and cracking failure is avoided, and the product yield is improved; on the other hand, the weak portion 11 and the reinforcing structure 12 are arranged at intervals, so that the weak portion 11 and the reinforcing structure 12 are prevented from generating an intersection, the reinforcing structure 12 is prevented from being influenced when the weak portion 11 is formed, the weak portion 11 is prevented from being influenced when the reinforcing structure 12 is formed, the explosion-proof function of the weak portion 11 and the reinforcing function of the reinforcing structure 12 are ensured, and various functions of the battery and the battery device are ensured.

The references to "parallel", "perpendicular" in this application are not entirely parallel, perpendicular, but rather are to some degree of error; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure 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 examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (14)

1. A battery, comprising:

a battery case provided with a reinforcing structure thereon, a weak portion provided around an outer periphery of the reinforcing structure, the weak portion including an opening portion, the reinforcing structure being provided at a distance from the weak portion; the reinforcing structure is located within the area surrounded by the weakened portion, the reinforcing structure has at least two end portions arranged along a first direction, the first direction is an extending direction of the reinforcing structure, and at least one end portion is arranged opposite to the opening portion of the weakened portion.

2. The battery according to claim 1, wherein the opening end portion of the weakened portion forming the opening portion is disposed at a distance from the reinforcing structure.

3. The battery of claim 1, wherein a width of the reinforcing structure is smaller than a width of the opening portion in a second direction, the second direction being perpendicular to the first direction.

4. The battery according to claim 3, wherein a difference between a width of the reinforcing structure and a width of the opening is 2mm or more and 8mm or less.

5. The battery of claim 1, wherein the reinforcing structure comprises at least two reinforcing portions disposed to intersect.

6. The battery of any one of claims 1-5, wherein the weakened portions are provided in a superior arc shape.

7. The battery of any of claims 1-5, wherein the reinforcement structure comprises a stiffening portion of inferior arc shape.

8. The battery of any one of claims 1-5, wherein the battery housing has a first face and a second face disposed opposite each other, the reinforcing structure is stamped and formed as a protrusion disposed on the first face, a recess is disposed on a side of the reinforcing structure facing away from the first face, and the first face is an outer surface of the battery housing.

9. The battery of any one of claims 1-5, wherein the battery housing has oppositely disposed first and second faces, the first face being an outer surface of the battery and the second face being an inner surface of the battery, at least one of the first and second faces being provided with a groove forming the frangible portion.

10. The battery of claim 9, wherein the first face and the second face are each provided with the recess.

11. The battery of any one of claims 1-5, wherein the battery housing has oppositely disposed first and second faces, the first face being an outer surface of the battery and the second face being an inner surface of the battery, the first face having a recess disposed therein, the recess being disposed between an outer edge of the first face and the frangible portion.

12. The battery of any one of claims 1-5, wherein a minimum spacing between the reinforcing structure and the weak portion is 0.5mm or more and 3mm or less.

13. The battery according to any one of claims 1 to 5, wherein the battery is a cylindrical battery, and the weak portion is provided on an end face of the cylindrical battery.

14. A battery device, characterized by comprising: a battery as claimed in any one of claims 1 to 13.

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