CN219350452U

CN219350452U - Battery and battery device

Info

Publication number: CN219350452U
Application number: CN202223419957.9U
Authority: CN
Inventors: 齐彬伟; 张璐璐
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-07-14
Anticipated expiration: 2032-12-20

Abstract

The utility model relates to the technical field of batteries and discloses a battery and a battery device; wherein the battery comprises a battery shell, a battery pole and a sealing piece; the battery shell is provided with a through hole and a reinforcing structure; the battery pole column penetrates through the through hole and is connected to the battery shell; the sealing element is arranged between the battery pole and the battery shell, the orthographic projection of the sealing element on the first reference plane is not overlapped with the orthographic projection of the reinforcing structure on the first reference plane, and the orthographic projection of the battery pole on the first reference plane is overlapped with the orthographic projection of the reinforcing structure on the first reference plane; the first reference plane is parallel to the surface of the battery shell, which is connected with the battery pole. The battery has good sealing performance.

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 battery device is an important component in the electric automobile, and the design optimization of the battery device becomes an important item for the development of the electric automobile.

However, the sealing performance of the battery in the battery device is poor.

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 aims to overcome the defect of poor sealing performance of the battery in the related art, and provide a battery with high sealing performance and a battery device including the battery.

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

a battery case provided with a through hole and a reinforcing structure;

the battery pole penetrates through the through hole and is connected with the battery shell;

the sealing piece is arranged between the battery pole and the battery shell, the orthographic projection of the sealing piece on a first reference plane is not overlapped with the orthographic projection of the reinforcing structure on the first reference plane, the orthographic projection of the battery pole on the first reference plane is overlapped with the orthographic projection of the reinforcing structure on the first reference plane, and the first reference plane is parallel to one surface of the battery shell connected with the battery pole.

In one aspect of the battery of the present disclosure, a reinforcement structure is provided on the battery housing. Because the battery can produce gas in its inside at the in-process of work to make the inside pressure increase of battery, and then lead to the inside gas of battery to exert great extrusion force to the battery casing, and can improve the structural strength of battery casing through set up additional strengthening on the battery casing, make the battery casing can bear the extrusion force that gas applyed it, thereby can effectively prevent the problem that the inflation warp appears in the battery casing. And, because the structural strength of battery case has promoted through additional strengthening, just can make whole battery have higher structural strength yet.

On the other hand, through locating the sealing member between battery utmost point post and the battery casing to make the orthographic projection of sealing member on first reference plane and the orthographic projection of additional strengthening on first reference plane not overlap, can prevent that additional strengthening from influencing the laminating degree between sealing member and battery utmost point post and the battery casing, thereby can prevent that additional strengthening from influencing the sealed effect of sealing member.

And through making the orthographic projection of battery post on first reference plane overlap with the orthographic projection of additional strengthening on first reference plane, can make additional strengthening under the prerequisite that does not influence the sealed effect of sealing member, be close to the battery post as far as possible, just also can carry out the structural reinforcement through additional strengthening to the part that the battery casing is close to the battery post, so as to prevent that the part that the battery casing is close to the battery post from taking place the inflation deformation because of the increase of battery inside pressure, thereby make the sealing member can closely laminate with battery post and battery casing all the time, in order to guarantee that the sealing member can have better sealed effect to battery post and battery casing all the time, and then improved the sealing performance of whole battery.

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

In one aspect of the battery device of the present disclosure, a reinforcement structure is provided on the battery case. Because the battery can produce gas in its inside at the in-process of work to make the inside pressure increase of battery, and then lead to the inside gas of battery to exert great extrusion force to the battery casing, and can improve the structural strength of battery casing through set up additional strengthening on the battery casing, make the battery casing can bear the extrusion force that gas applyed it, thereby can effectively prevent the problem that the inflation warp appears in the battery casing. And, because the structural strength of battery case has promoted through additional strengthening, just can make whole battery have higher structural strength yet.

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 top view of an example embodiment of a battery of the present disclosure.

Fig. 2 is a schematic view of a part of the structure of the section A-A in fig. 1 of the present disclosure.

Fig. 3 is a schematic structural view of an example embodiment of a cover plate of the present disclosure.

Fig. 4 is a schematic cross-sectional structure of another example embodiment of a cover plate of the present disclosure.

Reference numerals illustrate:

1. a battery case; 11. a cover plate; 12. a through hole; 13. a reinforcing structure; 14. a groove; 15. a protruding portion;

2. a battery post; 21. a pole body; 22. a first limit part;

3. a first insulating member; 31. a first insulating plate; 32. a first projection structure; 33. a second projection structure;

4. a second insulating member; 41. a second insulating plate; 42. a convex ring;

5. a seal; 6. a battery cell; 7. a current collector.

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 battery post 2, and a seal 5, as shown with reference to fig. 1 to 4; the battery case 1 may be provided with a through hole 12 and a reinforcing structure 13; the battery post 2 may penetrate through the through hole 12 and be connected to the battery case 1; the sealing member 5 may be disposed between the battery post 2 and the battery case 1, and the front projection of the sealing member 5 on the first reference plane may not overlap with the front projection of the reinforcing structure 13 on the first reference plane, and the front projection of the battery post 2 on the first reference plane may overlap with the front projection of the reinforcing structure 13 on the first reference plane. The first reference plane may be parallel to the side of the battery case 1 to which the battery post 2 is attached.

In the battery of the present disclosure, on the one hand, a reinforcing structure 13 is provided on the battery case 1. Because the battery can produce gas in its inside at the in-process of work to make the inside pressure increase of battery, and then lead to the inside gas of battery can apply great extrusion force to battery case 1, and can improve the structural strength of battery case 1 through set up additional strengthening 13 on battery case 1, make battery case 1 can bear the extrusion force that gas applyed it, thereby can effectively prevent that battery case 1 from appearing the problem of inflation deformation. In addition, since the structural strength of the battery case 1 is improved by the reinforcing structure, the entire battery can have high structural strength.

On the other hand, by disposing the seal 5 between the battery post 2 and the battery case 1, and making the orthographic projection of the seal 5 on the first reference plane and the orthographic projection of the reinforcing structure 13 on the first reference plane non-overlapping, it is possible to prevent the reinforcing structure 13 from affecting the degree of adhesion between the seal and the battery post 2 and the battery case 1, and thus it is possible to prevent the reinforcing structure 13 from affecting the sealing effect of the seal 5.

Moreover, through overlapping the orthographic projection of the battery post 2 on the first reference plane and the orthographic projection of the reinforcing structure 13 on the first reference plane, the reinforcing structure 13 can be made to be as close to the battery post 2 as possible on the premise of not influencing the sealing effect of the sealing element 5, and the part, close to the battery post 2, of the battery shell 1 can be structurally reinforced through the reinforcing structure 13, so that the expansion deformation of the part, close to the battery post 2, of the battery shell 1 due to the increase of the internal pressure of the battery is prevented, and the sealing element 5 can be always tightly attached to the battery post 2 and the battery shell 1, so that the sealing element 5 can always have a good sealing effect on the battery post 2 and the battery shell 1, and the sealing performance of the whole battery is improved.

In this embodiment, the battery may be a cylindrical battery or a rectangular parallelepiped battery. The following will specifically describe an example in which a battery is a cylindrical battery: referring to fig. 1 to 4, the battery may include a battery case 1, a battery cell 6, a battery post 2, and a seal 5.

Wherein, the battery case 1 may be provided in a cylindrical shape, the battery case 1 may include a cap plate 11 and a base plate (not shown in the drawings) provided opposite to each other, and the cap plate 11 and the base plate may each be provided in a circular shape. A sidewall is connected between the cover plate 11 and the bottom plate, the sidewall may be provided as a cylindrical surface, and the cover plate 11, the bottom plate, and the sidewall may enclose a receiving portion. The battery case 1 may be provided with a through-hole 12, and the through-hole 12 may be located on the cap plate 11, but is not limited thereto, and the through-hole 12 may be located at other positions of the battery case 1.

The battery cell 6 may be disposed in the receiving portion, and the battery cell 6 may be disposed in a cylindrical body adapted to the battery case 1. Through setting up battery case 1 and electric core 6 into the cylinder, when electric core 6 generates heat and expands, because battery case 1's lateral wall is the face of cylinder for battery case 1's atress is more even, with this expansion force that can offset electric core 6 and generate heat the production from all directions, thereby can reduce the probability that electric core 6 takes place to expand, and then can reduce the probability that whole battery takes place to expand.

The battery cell 6 may include a plurality of positive electrode sheets and a plurality of negative electrode sheets. The material of the positive plate can have higher nickel content, so that the energy density of the battery can be improved; the material of the negative electrode sheet may be graphite, but is not limited thereto, and the material of the positive electrode sheet and the negative electrode sheet may also be other materials, which will not be described here.

The battery post 2 may penetrate through the through hole 12 of the battery case 1 and be connected to the battery case 1. The battery post 2 may be connected with a plurality of positive electrode tabs to form a positive electrode of the battery. And a plurality of negative electrode tabs may be connected to the battery case 1 such that the battery case 1 forms the negative electrode of the battery. Of course, the battery post 2 may be a negative electrode of the battery, and the battery case 1 may be a positive electrode of the battery, that is: the battery post 2 may be connected to a plurality of negative electrode tabs, and a plurality of positive electrode tabs may be connected to the battery case 1.

The sealing member 5 can be located between the battery post 2 and the battery housing 1 to seal the gap between the battery post 2 and the battery housing 1, prevent substances such as electrolyte inside the battery from leaking out from the gap between the battery post 2 and the battery housing 1, and prevent substances such as air and liquid in the external environment from entering the battery through the gap between the battery post 2 and the battery housing 1 to damage the battery, thereby improving the working performance and the service life of the battery.

The seal 5 may be annular, for example: a ring shape or the like that can be fitted around the outer peripheral surface of the battery post 2 to seal the gap between the battery post 2 and the battery case 1 from the circumferential direction, thereby improving the sealability between the battery post 2 and the battery case 1. The seal 5 may be coaxial with the battery post 2, but is not limited thereto. The material of the seal ring may be rubber, but not limited thereto, and the seal ring may be a material having elasticity such as plastic.

Since the battery is heated and swelled in use, and the through hole where the battery case 1 is connected with the battery post 2 is a weak part of the battery case 1, the battery case 1 is easily deformed here, thereby causing a gap between the sealing member 5 and the battery case 1 and between the battery post 2, and resulting in poor sealing performance of the battery.

In order to solve the above-described technical problems, in the present exemplary embodiment, referring to fig. 2 to 4, a reinforcing structure 13 may be further provided on the battery case 1, and the reinforcing structure 13 may be provided on the cap plate 11, but is not limited thereto. The structural strength of the battery case 1 can be improved by arranging the reinforcing structure 13 on the battery case 1, so that the battery case 1 can bear the extrusion force applied by the gas to the battery case 1, and the problem of expansion deformation of the battery case 1 can be effectively prevented. And, since the structural strength of the battery case 1 is improved by the reinforcing structure 13, the entire battery can have high structural strength.

The front projection of the seal 5 on the first reference plane may be non-overlapping with the front projection of the stiffening structure 13 on the first reference plane, i.e.: the seal member 5 is not located in the reinforcing structure 13, so that the seal member can be tightly attached to the battery case 1, the reinforcing structure 13 is prevented from affecting the attaching degree between the seal member 5 and the battery post 2 and the battery case 1, and the seal effect of the seal member 5 can be prevented from being affected by the reinforcing structure 13.

In this example embodiment, the front projection of the battery post 2 on the first reference plane may overlap with the front projection of the reinforcing structure 13 on the first reference plane, so that the reinforcing structure 13 is as close to the battery post 2 as possible without affecting the sealing effect of the sealing member 5, that is, the portion of the battery housing 1 close to the battery post 2 can be structurally reinforced by the reinforcing structure 13, so as to prevent the portion of the battery housing 1 close to the battery post 2 from expanding and deforming due to the increase of the internal pressure of the battery, so that the sealing member 5 can be tightly attached to the battery post 2 and the battery housing 1 all the time, so that the sealing member 5 can always have a better sealing effect on the battery post 2 and the battery housing 1, and further the sealing performance of the whole battery is improved.

In the present exemplary embodiment, referring to fig. 4, the reinforcement structure 13 may be a groove 14 provided on the battery case 1, that is: the thickness of the reinforcing structure 13 is thin with respect to the thickness of the battery case 1 at the periphery of the reinforcing structure 13. Because the thickness of the reinforcing structure 13 is thinner, when the pressure intensity in the battery is increased, the reinforcing structure 13 is deformed at first, and the pressure intensity in the battery is reduced by utilizing the deformation of the reinforcing structure 13, so that the through hole of the battery shell 1 connected with the battery pole 2 is not deformed due to overlarge pressure intensity, and the sealing piece 5 can be tightly attached to the battery pole 2 and the battery shell 1 all the time, so that the sealing piece 5 can always have a good sealing effect on the battery pole 2 and the battery shell 1.

The recess 14 can be provided with a plurality of to a plurality of recesses 14 can encircle the through-hole 12 and set up, and the interval between two arbitrary adjacent recesses 14 can be the same, thereby can form a plurality of reduction departments in the circumference of through-hole 12 through a plurality of recesses 14, thereby can improve the ability that reinforced structure 13 reduces the inside pressure of battery, and then can further guarantee the partial battery casing 1 that laminates with annular seal 5 all can not take place to warp, guaranteed good leakproofness between battery casing 1 and the battery post 2.

But not limited thereto, the groove 14 may be only one, and the groove 14 may be provided in a ring shape, for example: annular, etc., which may be disposed around the seal 5, and which may be coaxial with the seal 5.

In the present exemplary embodiment, the side of the battery case 1 facing away from the recess 14 may be provided as a plane, that is: the recess 14 may be formed by thinning the battery case 1. In addition, since the surface of the battery shell 1, which is away from the groove 14, is a plane, other structures on the side of the battery shell 1, which is away from the groove 14, are in the battery, and the groove 14 does not need to be avoided, so that the manufacturing difficulty can be reduced.

In other example embodiments of the present disclosure, as shown with reference to fig. 2 and 3, a side of the battery case 1 facing away from the groove 14 may be provided with a protrusion 15 disposed opposite the groove 14. The both sides of this bulge 15 can be connected with the both sides of recess 14, so set up can form the strengthening rib in the both sides of recess 14 and bulge 15 to for the embodiment that only is provided with recess 14, can utilize the strengthening rib to support battery case 1, and then can make battery case 1 have bigger structural strength, make recess 14 and bulge 15 can bear bigger extrusion force, just also can prevent because inside gaseous extrusion leads to battery case 1 to take place the problem of deformation, guarantee that relative dimensional change can not take place between sealing member 5 and the battery case 1, thereby can guarantee that can have good leakproofness all the time between battery case 1 and the battery post 2.

In addition, the thickness of the bottom of the groove 14 can be increased by providing the protruding portion 15, so that the protruding portion 15 and the bottom of the groove 14 do not deform themselves when receiving a large pressing force. Accordingly, the problem of the reduced carrying capacity of the reinforcing bars due to the deformation of the bottom portions of the projections 15 and the grooves 14 themselves and the deformation of the reinforcing bars located on both sides thereof can be prevented. The structural strength and the bearing capacity of the battery case 1 can be further improved, and the problem of relative dimensional change between the sealing member 5 and the battery case 1 due to deformation of the battery case 1 is further prevented, so that good sealing performance can be always provided between the battery case 1 and the battery post 2.

In the present exemplary embodiment, the bottom of the groove 14 and the protrusion 15 may be of a unitary structure, that is: the bottom of the recess 14 and the protrusion 15 may be formed simultaneously by one process step. By such arrangement, the connection portion between the bottom of the groove 14 and the protruding portion 15 can be omitted, so that the carrying capacity of the bottom of the groove 14 and the protruding portion 15 can be improved, and the process step of connecting the bottom of the groove 14 and the protruding portion 15 can be omitted, so that the production cost can be reduced. The bottom of the recess 14 and the protrusion 15 may be formed by punching the battery case 1, that is: the battery case 1 may be punched in a direction away from the sealing member 5 such that a portion of the battery case 1 on a side close to the sealing member 5 is recessed to form the groove 14, and a portion of the battery case 1 on a side away from the sealing member 5 may be protruded from other portions of the battery case 1 to form the protrusion 15. It is within the scope of the present disclosure that the bottom of the recess 14 and the protrusion 15 may be formed by direct casting, etc., without being limited thereto.

In the present exemplary embodiment, the depth of the groove 14 may be 0.2 mm or more, and thus, it is possible to prevent the problem that the length of the rib formed by the groove 14 is too short due to the too small depth thereof, so that the rib cannot provide a strong load-bearing capacity. The depth of the groove 14 may be 2 mm or less, so that the bottom of the groove 14 can be prevented from being too thin, and thus the problem of too low bearing capacity of the bottom of the groove 14 can be prevented from occurring. For example: the depth of the grooves 14 may be 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, etc.

In other example embodiments of the present disclosure, the reinforcing structure 13 may also be other than the groove 14, for example: the reinforcing structure 13 may be a reinforcing rib provided directly on the battery case 1 or a projection 15 provided directly on the battery case 1, and may be selected and provided according to actual needs.

In the present exemplary embodiment, the battery post 2 may include a post body 21 and a first stopper 22. The post body 21 may penetrate through the through hole 12, and an end of the post body 21 near the battery cell 6 may be connected with a plurality of positive electrode tabs or a plurality of negative electrode tabs. The front projection of the pole body 21 may be circular, but not limited thereto, and the front projection of the pole body 21 may be rectangular or the like.

The first stopper 22 may be connected to the post body 21, and may be located at a side of the sealing member 5 facing away from the battery case 1. Therefore, the sealing element 5 can be located between the battery shell 1 and the first limiting part 22, and the displacement of the sealing ring in the first direction can be limited through the battery shell 1 and the first limiting part 22, so that the problem that the sealing ring falls off when the battery vibrates is prevented. The first direction may be a direction in which the battery case 1 is directed toward the first stopper 22.

The front projection of the first limiting portion 22 on the first reference plane may overlap with the front projection of the sealing member 5 on the first reference plane, and the front projection of the first limiting portion 22 on the first reference plane may overlap with the front projection of the reinforcing structure 13 on the first reference plane. By the arrangement, the distance between the sealing element 5 and the reinforcing structure 13 can be limited, so that the sealing element 5 and the reinforcing structure 13 can be arranged on one side, close to the battery shell 1, of the first limiting part 22, and the problem that the structural strength of the battery shell 1 positioned on the periphery of the sealing element 5 cannot be increased due to the fact that the reinforcing structure 13 is too far away from the sealing element 5 or the reinforcing structure 13 is prevented, and therefore the sealing element 5 and the battery shell 1 can be further guaranteed to be tightly attached all the time.

In the present exemplary embodiment, the seal 5 may be close to the post body 21 with respect to the first limit portion 22. However, the seal 5 may be away from the post body 21 with respect to the first stopper 22.

In the present exemplary embodiment, the battery post 2 may further include a second stopper (not shown in the drawings). The second limit portion may be connected to the post body 21 and located on a side of the battery case 1 facing away from the seal 5. Through setting up the second spacing portion, can make it cooperate with first spacing portion 22, tightly restrict battery case 1 and sealing member 5 between first spacing portion 22 and second spacing portion, further prevent to appear because battery vibration and lead to sealing member 5 to drop the problem. And, still can tightly press from both sides tight clamp of sealing member 5 and battery case 1 through first limit portion 22 and second limit portion for sealing member 5 can closely laminate with battery case 1 surface, thereby can improve the sealing performance of battery.

In the present exemplary embodiment, the battery may further include a first insulating member 3. The first insulator 3 may be provided between the first stopper 22 and the battery case 1. Since the first stopper 22 and the battery case 1 are both metal structural members. And battery post 2 and battery case 1 are the two poles of the battery respectively to can appear electrically conductive problem between first spacing portion 22 and the battery case 1, can block the electric current transmission between first spacing portion 22 and the battery case 1 through setting up first insulating part 3, just can prevent also that the problem that causes the battery damage because electrically conductive between first spacing portion 22 and the battery case 1. And, this first insulating member 3 can be located the one side that sealing member 5 deviates from utmost point post body 21 to first insulating member 3 also can seal the space between first spacing portion 22 and the battery case 1, when a small amount of gas leaks from sealing member 5, can also block it through this first insulating member 3, prevents that gas from leaking out, just also can further improve the leakproofness of battery.

The first insulating member 3 may include a first insulating plate 31 and a first protrusion structure 32. The first insulation plate 31 may be provided between the first stopper 22 and the battery case 1 to insulate between the first stopper 22 and the battery case 1. The first insulating plate 31 can be bonded to the first stopper 22 and the battery case 1, respectively, so that the sealing performance between the first stopper 22 and the battery case 1 can be improved.

The first protrusion structure 32 may be provided at a side of the first insulation plate 31 near the battery case 1, and may be fitted in the groove 14, that is: the first protruding structure 32 can be located in the groove 14, so that the first limiting portion 22 and the groove 14 can be insulated and isolated, and the problem of electric conduction between the first limiting portion 22 and the groove 14 is prevented. Meanwhile, since the first protrusion 32 is located in the groove 14, the groove 14 may be filled with the first protrusion 32 to some extent, so that the thickness of the bottom of the groove 14 may be increased. When the groove 14 is subjected to the expansion force exerted by the gas, the first protrusion structure 32 can give a force in the opposite direction to the bottom of the groove 14, so that deformation of the bottom of the groove 14 is prevented, and the structural strength of the groove 14 can be remarkably improved, and the bearing capacity of the groove 14 can be further improved.

The first projection 32 may fill the recess 14, i.e.: the first protruding structure 32 can be attached to the side wall and the bottom wall of the groove 14, so that all surfaces of the groove 14 are not exposed, and therefore insulation isolation between the first limiting portion 22 and any part of the groove 14 can be guaranteed, and conduction between the first limiting portion and any part of the groove 14 is avoided. Meanwhile, the first protruding structure 32 is used for filling the groove 14, so that the inside of the groove 14 is of a solid structure, and when the groove 14 is subjected to expansion force exerted by gas, the first protruding structure 32 can simultaneously give the whole groove 14 a force in the opposite direction, so that deformation of the bottom of the groove 14 and the side wall of the groove 14 is prevented. Thus, the structural strength of the groove 14 can be greatly improved relative to an embodiment in which the first projection 32 does not fill the groove 14.

The first insulating member 3 may further include a second protrusion structure 33. The second protrusion structure 33 can be provided at a side of the first insulation plate 31 near the first limiting portion 22, and can be provided around the outer circumference of the first limiting portion 22. Since the first limiting portion 22 is one electrode of the battery, if the outer peripheral surface of the first limiting portion 22 is exposed, the problem of electrical conduction may occur between the outer peripheral surface of the first limiting portion 22 and the battery case 1, and the outer peripheral surface of the first limiting portion 22 can be completely wrapped by the second protruding structure 33, so that good insulation and isolation can be formed between the outer peripheral surface of the first limiting portion 22 and the battery case 1, and the problem of battery damage due to electrical conduction occurring between the outer peripheral surface of the first limiting portion 22 and the battery case 1 is prevented.

The material of the first insulating member 3 may be plastic, but not limited thereto, and the material of the first insulating member 3 may also be a material having insulating properties such as rubber, plastic, etc., and may be selected and set according to actual needs.

In the present exemplary embodiment, the battery may further include a second insulating member 4. The second insulator 4 may be provided at least between the post body 21 and the battery case 1. Since the post body 21 and the battery case 1 are both metal structural members. And the pole body 21 and the battery case 1 are respectively connected with the positive electrode sheet or the negative electrode sheet, so that the problem of conduction possibly occurs between the pole body 21 and the battery case 1, and the current transmission between the pole body 21 and the battery case 1 can be blocked by arranging the second insulating member 4, so that the problem of battery damage caused by conduction occurring between the pole body 21 and the battery case 1 can be prevented.

The second insulating member 4 may include a second insulating plate 41 and a collar 42. The second insulating plate 41 may be provided at a side of the battery case 1 facing away from the first limiting portion 22 to insulate between the post body 21 and the battery case 1. The second insulating plate 41 may abut against at least one surface of the reinforcing structure 13 facing away from the first limiting portion 22. The abutment means that there is a force between the second insulating plate 41 and the reinforcing structure 13, and the reinforcing structure 13 can be supported by the second insulating plate 41, so that the structural strength of the reinforcing structure 13 can be improved, and the portion of the battery case 1 adjacent to the battery post 2 is ensured not to be deformed. When the reinforcing structure 13 is the groove 14, the second insulating plate 41 can abut against the side wall of the groove 14 close to the pole body 21, so that the side wall of the groove 14 can be prevented from being deformed, and the structural strength of the groove 14 can be improved.

In the present example embodiment, the battery may further include a current collector 7, and the current collector 7 may include the current collector 7 may be located between the battery case 1 and the battery cell 6 and may be connected with the battery cell 6 and the terminal assembly. The second insulating plate 41 may also be positioned on the side of the reinforcing structure 13 adjacent to the current collector 7 to insulate between the current collector 7 and the reinforcing structure 13. Meanwhile, the second insulating plate 41 can also support the bottom of the reinforcing structure 13 to further improve the structural strength of the reinforcing structure 13.

The second insulating plate 41 may also be located between the battery case 1 and the current collector 7, and may be respectively attached to the battery case 1 and the current collector 7, so that the battery case 1 and the current collector 7 can be insulated and isolated, and the problem of conduction between the battery case 1 and the current collector 7 is prevented. Meanwhile, the second insulating plate 41 can also support the battery case 1 to increase the structural strength of the battery case 1.

The collar 42 may be connected to the second insulating plate 41 and may be located between the post body 21 and the battery case 1 to separate the post body 21 and the battery case 1, thereby achieving insulation between the post body 21 and the battery case 1. The convex ring 42 can be respectively attached to the pole body 21 and the battery case 1, so that the pole body 21 or the battery case 1 can be prevented from being exposed, and the problem of conduction between the pole body 21 and the battery case 1 can be thoroughly prevented. In addition, after the collar 42 is attached to the post body 21 and the battery case 1, the gas inside the battery can be blocked, and the sealing performance between the post body 21 and the battery case 1 can be improved.

The material of the second insulating member 4 may be plastic, but not limited thereto, and the material of the second insulating member 4 may be a material having insulating properties such as rubber or plastic, and may be selected and set according to actual needs.

Based on the same inventive concept, the present disclosure provides a battery device. The battery device may include a battery as described in any one of the following, and the specific structure of the battery has been described in detail above, so that a detailed description thereof will be 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.

In the battery device of the present disclosure, on the one hand, the reinforcing structure 13 is provided on the battery case 1. Because the battery can produce gas in its inside at the in-process of work to make the inside pressure increase of battery, and then lead to the inside gas of battery can apply great extrusion force to battery case 1, and can improve the structural strength of battery case 1 through set up additional strengthening 13 on battery case 1, make battery case 1 can bear the extrusion force that gas applyed it, thereby can effectively prevent that battery case 1 from appearing the problem of inflation deformation. In addition, since the structural strength of the battery case 1 is improved by the reinforcing structure, the entire battery can have high structural strength.

Moreover, through making the orthographic projection of battery post 2 on first reference plane overlap with the orthographic projection of additional strengthening 13 on first reference plane, can make additional strengthening 13 be close to battery post 2 as far as possible under the prerequisite that does not influence the sealed effect of sealing member 5, just also can carry out the structural reinforcement to the part that battery casing 1 is close to battery post 2 through additional strengthening 13, so as to prevent that the part that battery casing 1 is close to battery post 2 from taking place the inflation deformation because of the increase of battery internal pressure, thereby make sealing member 5 can closely laminate with battery post 2 and battery casing 1 all the time, so as to guarantee that sealing member 5 can have better sealed effect to battery post 2 and battery casing 1 all the time, and then improved the sealing performance of whole battery device.

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

1. A battery, comprising:

a battery case provided with a through hole and a reinforcing structure;

2. The battery of claim 1, wherein the reinforcing structure is a groove provided on the battery case.

3. The battery of claim 2, wherein a face of the battery housing facing away from the recess is provided with a projection disposed opposite the recess.

4. The battery of claim 2, wherein a face of the battery housing facing away from the recess is provided as a planar face.

5. The battery of claim 2, wherein the battery post comprises:

a pole body penetrating the through hole;

the first limiting part is connected to the pole body and is positioned on one side, deviating from the battery shell, of the sealing element, the orthographic projection of the first limiting part on the first reference plane is overlapped with the orthographic projection of the sealing element on the first reference plane, and the orthographic projection of the first limiting part on the first reference plane is overlapped with the orthographic projection of the reinforcing structure on the first reference plane.

6. The battery of claim 5, wherein the battery further comprises:

the first insulating piece is arranged between the first limiting part and the battery shell and is positioned at one side of the sealing piece, which is away from the pole body.

7. The battery of claim 6, wherein the first insulator comprises:

the first insulation plate is arranged between the first limiting part and the battery shell;

the first protruding structure is arranged on one side, close to the battery shell, of the first insulating plate, and the first protruding structure is matched in the groove.

8. The battery of claim 7, wherein the first insulator further comprises:

the second protruding structure is arranged on one side, close to the first limiting part, of the first insulating plate, and surrounds the periphery of the first limiting part.

9. The battery of claim 1, wherein the battery is a cylindrical battery.

10. A battery device, characterized by comprising: a battery as claimed in any one of claims 1 to 9.