CN219267835U - Batteries and battery devices - Google Patents

Abstract

The present disclosure relates to the technical field of batteries, and discloses a battery and a battery device; the battery includes a battery case, a reinforcement structure is provided on the battery case, and a weak portion is provided around the periphery of the reinforcement structure, the weak portion includes an opening, and the reinforcement structure and Weak part interval setting. The battery can form the required weak part, and the high-temperature gas can break through the weak part smoothly, ensuring the safety of the battery; ensuring that the thickness of the weak part is consistent throughout, avoiding excessively weak parts and failures, and improving product yield; ensuring The explosion-proof function of the weak part and the strengthening function of the reinforced structure ensure the various functions of the battery.

Description

Batteries and battery devices

technical field

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

Background technique

As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high working voltage, light weight, small size, long cycle life, good safety, and environmental protection. They are widely used in portable appliances, electric tools, large Energy storage, electric transportation power supply and other aspects have broad application prospects.

However, at present, the battery casing of the battery is prone to bursting abnormally.

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

Utility model content

The purpose of the present disclosure is to overcome the disadvantage that the battery case of the related art is easy to explode abnormally, and provide a battery in which the battery case is not easy to explode abnormally, and a battery device including the battery.

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

The battery case is provided with a reinforcement structure, and a weakened portion is disposed around the periphery of the reinforcement structure, the weakened portion includes an opening, and the reinforcement structure is spaced apart from the weakened portion.

In the battery of the present disclosure, on the one hand, a weak portion is provided around the periphery of the reinforcement structure, so that the reinforcement structure can strengthen the area surrounded by the weak portion, so as to ensure the strength of the battery case and the safety of the battery; on the other hand, the weak The part includes the opening part, that is, the weak part is set as a non-closed structure. When the weak part is formed by stamping, the intersection is avoided, so that the material produced after stamping and thinning can be squeezed around in time, and the required weak part can be formed. High temperature The gas can break through the weak part smoothly to ensure the safety of the battery; when the weak part is formed by removing a part of the solid material of the bottom plate, it is necessary to avoid secondary removal of material on part of the weak part to ensure that the thickness of the weak part is consistent everywhere. Avoid excessive weak points and crack failures to improve product yield; on the other hand, the weak part and the reinforced structure are arranged at intervals to avoid the intersection of the weak part and the reinforced structure, and to avoid the impact on the reinforced structure when the weak part is formed. Avoid the impact on the weak part when forming the reinforced structure, ensure the explosion-proof function of the weak part and the strengthening function of the reinforced structure, and ensure the various functions of the battery.

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

In the battery device of the present disclosure, on the one hand, a weak portion is provided around the periphery of the reinforcement structure, so that the reinforcement structure can strengthen the area surrounded by the weak portion, so as to ensure the strength of the battery case and the safety of the battery and the battery device; On the one hand, the weak part includes an opening part, that is, the weak part is set as a non-closed structure, and when the weak part is formed by stamping, the intersection is avoided, so that the material produced after stamping and thinning can be squeezed around in time to form the required For the weak part, the high-temperature gas can break through the weak part smoothly to ensure the safety of the battery and the battery device; when the weak part is formed by removing a part of the solid material of the bottom plate, it is necessary to avoid secondary material removal processing on a part of the weak part to ensure the safety of the weak part. The thickness of each part of the part is consistent, avoiding the occurrence of weak parts and crack failures, and improving product yield; on the other hand, the weak part and the reinforced structure are set at intervals to avoid the intersection of the weak part and the reinforced structure, avoiding the formation of The weak part will have an impact on the reinforced structure, avoiding the impact on the weak part when the reinforced structure is formed, ensuring the explosion-proof function of the weak part and the strengthening function of the reinforced structure, and ensuring the various functions of the battery and battery device.

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 present disclosure.

Description of 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. Apparently, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of an exemplary embodiment of a battery of the present disclosure.

FIG. 2 is a schematic structural diagram of the bottom plate in FIG. 1 .

FIG. 3 is a schematic cross-sectional view of the latter exemplary embodiment taken along line A-A in FIG. 2 .

FIG. 4 is a schematic cross-sectional view of another exemplary embodiment taken along line A-A in FIG. 2 .

FIG. 5 is a schematic cross-sectional view of another exemplary embodiment taken along line A-A in FIG. 2 .

Explanation of reference signs:

1. Battery case;

11, weak part; 111, opening; 1111, opening end; 112, groove;

12. Reinforcement structure; 121. End portion; 122. Reinforcement portion;

13. The first surface; 14. The second surface; 15. The concave part; 16. The protruding structure; 17. The cover plate; 18. The side plate; 19. The bottom plate; 191. The lower concave part;

2. Battery pole;

X, the first direction; Y, the second direction.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, 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 example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions 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 only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so that it is upside down, then elements described as being "upper" will become elements that are "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" placed on another structure, or that a structure is "indirectly" placed on another structure through another structure. other structures.

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 "have" are used to indicate an open and means that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first", "second" and "third" etc. only Used as a marker, not a limit on the number of its objects.

In this application, unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral body; it can be a direct connection, or It can be connected indirectly through an intermediary. "And/or" is just an association relationship describing associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone. situation. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

An exemplary embodiment of the present disclosure provides a battery. Referring to FIGS. 1-4 , the battery may include a battery case 1, a reinforcement structure 12 is provided on the battery case 1, and a weak portion 11 is provided around the periphery of the reinforcement structure 12. The weak portion 11 may include an opening 111 , and the reinforcing structure 12 is spaced apart from the weak portion 11 .

In this exemplary embodiment, as shown in FIG. 1 , the battery can be a cylindrical battery, therefore, the battery case 1 can be configured as a cylinder, that is, the battery case 1 can include a cover plate 17 and a bottom plate 19 arranged oppositely, the cover plate 17 and the bottom plate 19 are both arranged in a circular shape, and a side plate 18 is connected between the cover plate 17 and the bottom plate 19, and the side plate 18 is arranged in a cylindrical shape. The side plate 18 , the cover plate 17 and the bottom plate 19 surround and form a battery accommodating space. The cover plate 17 and the bottom plate 19 are the end faces of the cylindrical battery.

Of course, in other exemplary embodiments of the present disclosure, the bottom plate 19 and the cover plate 17 can be arranged in a rectangular, elliptical, trapezoidal shape, etc., and the side plates 18 can be set in one or more, and form a rectangular, elliptical, or trapezoidal shape around them. etc., so that the battery case 1 is formed into a rectangular parallelepiped, an elliptical column, a prism, or the like. The battery case 1 can also be in other shapes, which will not be repeated here.

In this exemplary embodiment, a battery cell is disposed in the accommodation space of the battery case 1 , and the battery cell is configured as a cylinder that fits the battery case 1 . The battery cell may include a positive electrode sheet and a negative electrode sheet (not shown in the figure), and a separator arranged between the positive electrode sheet and the negative electrode sheet.

The battery may also include positive and negative tabs (not shown). The positive tab is connected to the battery cell, specifically, the positive tab is connected to the positive plate; the positive tab is located on the side of the battery cell close to the cover plate 17 , that is, the positive tab is located on the side of the battery cell close to the battery pole 2 . The negative tab is connected to the cell, specifically, the negative tab is connected to the negative plate; and the negative tab and the positive tab are located on the same side of the cell, that is, the negative tab is located on the side of the cell close to the cover plate 17. It can also be said that the negative tab is The ear is located on the side of the battery cell close to the battery pole 2. Of course, the positive tab and the negative tab can also be located on opposite sides of the cell.

A battery pole 2 is arranged on the side of the battery cell close to the cover plate 17, and the positive pole ear is connected to the battery pole 2; the battery pole 2 extends out of the battery case 1 through the first through hole on the cover plate 17 to form a battery positive pole. And the negative tab can be connected to the battery case 1, which forms the negative pole 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 pole 2 needs to be insulated and connected to the battery case 1 , specifically, the battery pole 2 is insulated and connected to the cover plate 17 . Of course, the battery pole 2 can be the negative pole of the battery, and the battery case 1 can be the positive pole of the battery.

The thermal runaway of the battery cell may occur. When the thermal runaway of the battery cell will generate a large amount of high-temperature gas, if the high-temperature gas cannot be discharged in time, it will cause the battery to explode, affect the surrounding batteries and components, and even cause safety accidents in severe cases. Therefore, the battery case 1 is provided with a weak portion 11 , and when the battery cell undergoes thermal runaway, the high-temperature gas generated will break through the weak portion 11 and be discharged through the weak portion 11 in time to prevent the battery from exploding.

Moreover, in order to avoid damage to a part of the weak portion 11 of the battery case 1 that causes the weak portion 11 to explode abnormally, a reinforcement structure 12 is provided. The reinforcement structure 12 can improve the strength of the battery case 1, but the weak portion 11 and the reinforcement structure 12 It is easy to interfere, resulting in local stress concentration of the battery case 1, and abnormal bursting is prone to occur.

In this exemplary embodiment, the weak portion 11 may be disposed on the bottom plate 19 , and meanwhile, the reinforcing structure 12 may also be disposed on the bottom plate 19 . Certainly, the weakened portion 11 and the reinforcing structure 12 may also be disposed on the cover plate 17 , and the weakened portion 11 and the reinforcing structure 12 may also be disposed on the side plate 18 .

In the following, description will be made by taking the weakened portion 11 and the reinforcement structure 12 both disposed on the bottom plate 19 as an example.

2 and 3, the battery case 1 has a first surface 13 and a second surface 14 opposite to each other. Specifically, the bottom plate 19 may include a first surface 13 and a second surface 14 opposite to each other. The first surface 13 is the outer surface, and the outer surface is the surface away from the battery core; the second surface 14 is the inner surface, and the inner surface is the surface close to the battery core. The weak portion 11 may be a groove 112 provided on the bottom plate 19 , specifically, the weak portion 11 may be a groove 112 provided on the first surface 13 . The weakened portion 11 can be formed by stamping, specifically, the base plate 19 is stamped from the first surface 13 of the base plate 19 to form the weakened portion 11; One side of the first surface 13 is provided with a protruding structure 16 , that is, a groove 112 is formed on the first surface 13 of the bottom plate 19 , and a protruding structure 16 is formed on the second surface 14 of the bottom plate 19 . The thickness of the cover plate 17 at the weak portion 11 is thinned by stamping, and when the battery core experiences thermal runaway, the high-temperature gas generated will break through the weak portion 11 and be discharged through the weak portion 11 in time to avoid battery explosion. Certainly, the weak portion 11 may be a groove 112 disposed on the second surface 14 .

Referring to FIG. 2 and FIG. 3 , the reinforcement structure 12 may be a protrusion provided on the bottom plate 19 , specifically, the reinforcement structure 12 may be a protrusion provided on the first surface 13 . The reinforcement structure 12 can also be formed by stamping, specifically, the bottom plate 19 is stamped from the second surface 14 of the bottom plate 19 to form the reinforcement structure 12; the reinforcement structure 12 protrudes toward the first surface 13 side, and the reinforcement structure 12 deviates from the first A concave portion 15 is provided on one side of the surface 13 , that is, a protruding portion is formed on the first surface 13 of the bottom plate 19 , and a concave portion 15 is formed on the second surface 14 of the bottom plate 19 . The side walls of the reinforcement structure 12 formed by stamping are equivalent to reinforcement ribs, which can increase the strength of the cover plate 17 . Certainly, the reinforcement structure 12 may be a protrusion provided on the second surface 14 .

In the case where both the weakened portion 11 and the reinforcing structure 12 are formed by punching, the protruding direction of the weakened portion 11 is opposite to the protruding direction of the reinforcing structure 12 . When forming the weak part 11 and the reinforcing structure 12 by stamping, there is a certain extrusion effect on the material of the bottom plate 19, and the protruding direction of the weak part 11 is opposite to that of the reinforcing structure 12, so that when forming the weak part 11 and the reinforcing structure 12, punching The directions are opposite to avoid the stress concentration produced by extruding the bottom plate 19 from the same direction, that is, to reduce the stress caused by stamping and avoid affecting the strength of the bottom plate 19 .

3, and the protruding height H1 of the protruding structure 16 is greater than the protruding height H2 of the reinforcing structure 12; Equal to 0.03m and less than or equal to 3mm. The protruding height H1 of the protruding structure 16 is designed higher, so that the thickness of the cover plate 17 at the protruding structure 16 is thinned, and when the thermal runaway of the battery cell occurs, the high-temperature gas generated will break through the weak part 11; The protruding height H2 of the reinforcement structure 12 is designed to be low, so that the thickness of the cover plate 17 at the reinforcement structure 12 is basically not reduced, so that the reinforcement structure 12 has the effect of increasing the strength of the bottom plate 19. When the thermal runaway of the battery cell occurs, The generated high-temperature gas will not break through the reinforcement structure 12 .

In addition, in some other exemplary embodiments of the present disclosure, as shown in FIG. It can be formed by machining. In this case, the weakened portion 11 is a groove 112 provided on the first surface 13 , and a part of the second surface 14 opposite to the weakened portion 11 is a plane. Similarly, the thickness of the cover plate 17 at the weak portion 11 is reduced, and when the battery core undergoes thermal runaway, the high-temperature gas generated will break through the weak portion 11 and be discharged through the weak portion 11 in time to avoid battery explosion.

Certainly, as shown in FIG. 5 , grooves 112 may be provided on both the first surface 13 and the second surface 14, and the grooves 112 on the first surface 13 are opposite to the grooves 112 on the second surface 14. The provided groove 112 forms the weakened portion 11 .

In some other exemplary embodiments of the present disclosure, the reinforcement structure 12 may be a solid structure disposed on the bottom plate 19 , and the reinforcement structure 12 may be integrally connected with the bottom plate 19 by welding or bonding.

Referring to FIG. 2 , the weakened portion 11 is at least a semi-enclosed structure, so that the weakened portion 11 is provided with an opening 111 , and the weakened portion 11 surrounds and forms an area. It should be noted that the semi-enclosed structure refers to a structure in which two or more consecutive sides are sealed. In the case where the weak portion 11 is set to a circular arc shape, the weak portion 11 is at least set to a semi-circular arc shape; when the weak portion 11 is set to a rectangular shape, the weak portion 11 includes at least two connected grooves 112, and the two sections Angles are formed between the grooves 112 .

In this exemplary embodiment, the weakened portion 11 is arranged in an arc shape, and the central angle corresponding to the weakened portion 11 is greater than 180 degrees, that is, the weakened portion 11 is arranged in a mostly semicircular arc shape, so that the weakened portion 11 is formed with an opening 111 . Of course, in some other exemplary embodiments of the present disclosure, the weak portion 11 can be set in a multi-elliptical arc shape, various regular or irregular semi-enclosed curve shapes, and the weak portion 11 is also formed with an opening 111; The opening portion 111 is rectangular or various polygonal shapes.

With this arrangement, when the weak portion 11 is formed by punching, the intersection is avoided. Compared with the weak portion 11 of the closed structure, the material produced after punching and thinning can be squeezed to the surroundings in time to prevent the material from being squeezed to the surroundings in time. As a result, the required weak portion 11 cannot be formed, and the high-temperature gas cannot smoothly break through the weak portion 11; when the weak portion 11 is formed by removing a part of the solid material of the bottom plate 19, it is necessary to avoid the occurrence of a junction, that is, to avoid a part of the weak portion 11. The processing of material removal ensures that the thickness of the weak portion 11 is consistent throughout, and avoids excessively weak portions and crack failures.

The weakened portion 11 is arranged around the periphery of the reinforcement structure 12, that is, the reinforcement structure 12 is located within the area surrounded by the weakened portion 11, and the reinforcement structure 12 disposed within the area surrounded by the weakened portion 11 can The strength of the bottom plate 19 is reinforced.

The weak portion 11 and the reinforcing structure 12 are spaced apart, that is, the weak portion 11 and the reinforcing structure 12 are not connected. Moreover, the opening end 1111 of the opening 111 of the weak portion 11 is spaced apart from the reinforcing structure 12 .

The minimum distance between the weak portion 11 and the reinforcing structure 12 is greater than or equal to 0.5mm and less than or equal to 3mm, for example, the minimum distance can be 0.5mm, 0.8mm, 1.2mm, 1.5mm, 1.75mm, 2mm, 2.2mm, 2.65mm, 2.86mm and so on.

When the weakened portion 11 and the reinforced structure 12 are formed by stamping, intersections between the weakened portion 11 and the reinforced structure 12 are avoided. 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 will be punched once from the first face 13 side and then from the second face 14 side. Stamping once results in neither the weak portion 11 nor the strengthening structure 12 being formed at the intersection;

Moreover, if the distance between the weakened portion 11 and the reinforcing structure 12 is small, the area between the weakened portion 11 and the reinforcing structure 12 not only receives a pulling force toward the first surface 13, but also receives a pulling force toward the second surface 14. The pulling force causes the thickness of the area between the weak portion 11 and the reinforcing structure 12 to be thinned, and even rupture and failure will occur.

When the weakened portion 11 is formed by removing a part of the solid material of the bottom plate 19, and the reinforcing structure 12 is formed by stamping, since the thickness of the position where the weakened portion 11 is formed has been reduced, if the stamping is performed again, the intersection with the weakened portion 11 will be made. The thickness of the place is thinner, and it will even cause cracking and failure.

Moreover, if the distance between the weak portion 11 and the reinforcing structure 12 is small, the area between the weak portion 11 and the reinforcing structure 12 will also be subjected to the pulling force generated by stamping, resulting in the area between the weak portion 11 and the reinforcing structure 12 If the thickness is reduced, it will even cause cracking and failure.

The reinforcement structure 12 has at least two ends arranged along the first direction X, which is the extension direction of the reinforcement structure 12 , and at least one end is arranged opposite to the opening 111 of the weak portion 11 .

Any processing technology and processing equipment have certain errors. If the two ends 121 of the reinforcement structure 12 are arranged opposite to the weak portion 11, the reinforcement structure 12 is easy to produce an intersection area with the weak portion 11 due to errors, or to form an intersection with the weak portion 11. The distance between 11 is relatively short, which cannot meet the requirement for the distance between the reinforcing structure 12 and the weak portion 11 . One end 121 of the reinforcement structure 12 is arranged opposite to the opening 111 of the weak portion 11, so that in the process of processing, the reinforcement structure 12 can be processed as close to the opening 111 as possible while ensuring the design requirements, that is, the opening 111 As a fault-tolerant area, even if there are errors in the processing technology and processing equipment, the reinforcement structure 12 and the weak portion 11 will not produce an intersection area, and the distance between the reinforcement structure 12 and the weak portion 11 meets the requirements.

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

In the second direction Y, the width of the reinforcement structure 12 is smaller than the width of the opening 111 , and the second direction Y is perpendicular to the first direction X.

In order to ensure the coverage area of the reinforcement structure 12, the width of the reinforcement structure 12 in the second direction Y should be set as large as possible. However, the minimum distance between the reinforcement structure 12 and the weak portion 11 needs to meet the above minimum distance requirements. Therefore, the reinforcement structure 12 The width S is smaller than the width K of the opening 111 .

Specifically, the difference between the width S of the reinforcement structure 12 and the width K of the opening 111 is greater than or equal to 2 millimeters and less than or equal to 8 millimeters. Since the reinforcement structure 12 is symmetrically arranged, the end 121 of the reinforcement structure 12 and the weak portion 11 The distance between the opening ends 1111 forming the opening 111 is greater than or equal to 1 mm and less than or equal to 4 mm.

Referring to Fig. 2, the reinforcing structure 12 can be set to include two inferior arc-shaped reinforcing parts 122, that is, the reinforcing part 122 is set to an arc less than a semicircle, and the central angle corresponding to the reinforcing part 122 is less than 180 degrees, so that the reinforcing part The area of the bottom plate 19 occupied by 122 is relatively large, so as to ensure the effect of the reinforcement structure 12 on increasing the strength of the bottom plate 19 . Of course, in some other exemplary embodiments of the present disclosure, the reinforcing part 122 can be set as a straight line, or can be set as a curved line of any shape. Shaped curves are connected with straight curves to form.

Further, the two reinforced parts 122 can be arranged crosswise, because the two reinforced parts 122 are formed by the same stamping process, therefore, even if the two reinforced parts 122 are arranged crosswise, the intersections are formed by the same stamping process For example, the structures on the stamping die are arranged crosswise, so there will be no defects such as too thin thickness of the reinforcement structure 12 and stress concentration caused by multiple stampings.

In addition, more reinforcing parts 122 may be provided, and two or more reinforcing parts 122 may be provided in parallel.

In addition, the battery case 1 has a first surface 13 and a second surface 14 opposite to each other. Specifically, the bottom plate 19 may include a first surface 13 and a second surface 14 opposite to each other. The first surface 13 is an outer surface, and the second Face 14 is the inner surface. An annular lower concave portion 191 is also provided on the base plate 19, specifically, a lower concave portion 191 is provided on the first surface 13, and the lower concave portion 191 surrounds the periphery of the weak portion 11 and is located within the outer edge of the first surface 13; The strength of the weak portion 11 peripheral area of the bottom plate 19 can be increased by the lower concave portion 191; and adhesive glue can be accommodated in the lower concave portion 191, so that the battery and the battery box are bonded firmly; between the lower concave portion 191 and the outer edge of the first surface 13 The area can hold the electrolyte.

Based on the same inventive concept, an exemplary embodiment of the present disclosure provides a battery device, which may include any one of the batteries described above. The specific structure of the battery has been described in detail above, so details are not repeated here.

It should be noted that in addition to the battery, the battery device also includes other necessary components and components, such as battery boxes, circuit boards, control components, etc., and those skilled in the art can make corresponding adjustments according to the specific use requirements of the battery device. supplemented, and will not be repeated here.

The battery and battery device of the present disclosure, on the one hand, is provided with a weakened portion 11 around the outer periphery of the reinforcement structure 12, so that the reinforcement structure 12 can strengthen the area surrounded by the weakened portion 11, so as to ensure the strength of the battery case 1, ensure the battery and The safety of the battery device; on the other hand, the weak part 11 includes an opening 111, that is, the weak part 11 is set as a non-closed structure, and when the weak part 11 is formed by stamping, the intersection is avoided, so that the material produced after stamping is thinned It can be squeezed around in time to form the required weak part 11, and the high-temperature gas can break through the weak part 11 smoothly, ensuring the safety of the battery and battery device; when the weak part 11 is formed by removing a part of the solid material of the bottom plate 19, it is necessary A part of the weak portion 11 is processed for secondary removal of material to ensure that the thickness of the weak portion 11 is consistent throughout, avoiding the occurrence of excessively weak points and crack failures, and improving product yield; on the other hand, the weak portion 11 and the reinforced The structures 12 are arranged at intervals to prevent the weak part 11 and the reinforcing structure 12 from intersecting, avoiding the impact on the reinforcing structure 12 when the weak part 11 is formed, avoiding the impact on the weak part 11 when forming the reinforcing structure 12, and ensuring the strength of the weak part 11. The explosion-proof function and the reinforcing function of the reinforcing structure 12 ensure various functions of the battery and the battery device.

The "parallel" and "perpendicular" mentioned in this application are not completely parallel or perpendicular, but have certain errors; for example, if the angle between the two is greater than or equal to 0° and less than or equal to 5°, it is considered The two are parallel to each other; the angle between the two is greater than or equal to 85° and less than or equal to 95°, that is, the two are considered to be perpendicular to each other.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

Claims (14)

1. A battery, characterized in that, comprising: The battery casing is provided with a reinforcing structure, and a weakened portion is arranged around the outer periphery of the reinforcing structure, the weakened portion includes an opening, and the reinforcing structure is spaced apart from the weak portion; the reinforcing structure is located at the weak In the region surrounded by the reinforcement structure, the reinforcement structure has at least two end portions arranged along a first direction, the first direction being the extension direction of the reinforcement structure, at least one of the end portions and the weak portion The openings are set opposite to each other. 2 . The battery according to claim 1 , wherein the opening end of the opening forming the weakened portion is spaced apart from the reinforcing structure. 3 . 3 . The battery according to claim 1 , wherein a width of the reinforcing structure is smaller than a width of the opening in a second direction, and the second direction is perpendicular to the first direction. 4 . The battery according to claim 3 , wherein the difference between the width of the reinforcement structure and the width of the opening is greater than or equal to 2 millimeters and less than or equal to 8 millimeters. 5 . The battery according to claim 1 , wherein the reinforcing structure comprises at least two intersecting reinforcing parts. 6. The battery according to any one of claims 1-5, characterized in that, the weakened portion is arranged in a curved shape. 7. The battery according to any one of claims 1-5, wherein the reinforcement structure comprises a minor arc-shaped reinforcement portion. 8. The battery according to any one of claims 1-5, wherein the battery case has a first surface and a second surface opposite to each other, the reinforcement structure is formed by stamping, and the reinforcement structure is set On the protruding portion of the first surface, a concave portion is provided on the side of the reinforcement structure away from the first surface, the first surface being the outer surface of the battery case. 9. The battery according to any one of claims 1-5, wherein the battery casing has a first surface and a second surface oppositely arranged, the first surface is the outer surface of the battery, The second surface is the inner surface of the battery, and at least one of the first surface and the second surface is provided with a groove to form the weak portion. 10. The battery according to claim 9, wherein the first surface and the second surface are both provided with the groove. 11. The battery according to any one of claims 1-5, wherein the battery casing has a first surface and a second surface oppositely arranged, the first surface is the outer surface of the battery, The second surface is the inner surface of the battery, and the first surface is provided with a concave portion, and the concave portion is disposed between the outer edge of the first surface and the weak portion. 12. The battery according to any one of claims 1-5, wherein a minimum distance between the reinforcing structure and the weakened portion is greater than or equal to 0.5 mm and less than or equal to 3 mm. 13. The battery according to any one of claims 1-5, wherein the battery is a cylindrical battery, and the weakened portion is disposed on an end surface of the cylindrical battery. 14. A battery device, comprising: the battery according to any one of claims 1-13.

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