CN218887355U

CN218887355U - Battery with a battery cell

Info

Publication number: CN218887355U
Application number: CN202223579367.2U
Authority: CN
Inventors: 陆敬家; 孙倩倩; 张璐璐
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-18
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to a battery technology field provides a battery, include: the shell structure is provided with a through hole penetrating through the shell structure; the pole is at least partially arranged in the through hole; the glass transition temperature of the hard sealing element is 300-600 ℃, and at least part of the hard sealing element is arranged in the through hole so as to seal the pole and the shell structure; the buffer groove is arranged on the shell structure, so that the force generated by the shell structure in the vibration process can be absorbed, the risk of breakage of the hard sealing element caused by vibration of the shell structure can be avoided, the failure risk of the hard sealing element can be avoided, and the safety performance of the battery can be improved.

Description

Battery with a battery cell

Technical Field

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

Background

In the related technology, the batteries are mostly sealed by adopting sealing rubber, but the sealing rubber has the phenomenon of rubber aging along with the soaking of time and electrolyte, so that the subsequent sealing is invalid, and the overall service life of the batteries is influenced.

SUMMERY OF THE UTILITY MODEL

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

The utility model provides a battery, include:

the shell structure is provided with a through hole penetrating through the shell structure;

the pole is at least partially arranged in the through hole;

the glass transition temperature of the hard sealing element is 300-600 ℃, and at least part of the hard sealing element is arranged in the through hole so as to seal the pole and the shell structure;

wherein, the shell structure is provided with a buffer slot.

The utility model discloses a battery of an embodiment includes shell structure, utmost point post and stereoplasm sealing member, and utmost point post wears to locate shell structure's perforation in, and the at least part of stereoplasm sealing member sets up in the perforation to can make the stereoplasm sealing member realize effectively sealed to utmost point post and shell structure, because the hardness of stereoplasm sealing member is great, be difficult to appear ageing deformation scheduling problem, thereby can improve the sealing performance of stereoplasm sealing member between to utmost point post and shell structure. Through be provided with the dashpot on shell structure, can absorb the power that shell structure produced at the vibration in-process to can avoid leading to the broken risk of stereoplasm sealing member because shell structure vibrates, consequently can avoid stereoplasm sealing member to take place the risk of becoming invalid, with this security performance that improves the battery.

Drawings

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

Wherein:

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

FIG. 2 is a schematic diagram illustrating a partial cross-sectional configuration of a battery according to an exemplary embodiment;

fig. 3 is a schematic view showing a partial sectional structure of a battery according to another exemplary embodiment.

The reference numerals are illustrated below:

10. a housing structure; 11. perforating; 12. a buffer tank; 13. a first housing member; 131. a first portion; 132. a second portion; 14. a second housing member; 20. a pole column; 30. a hard seal.

Detailed Description

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

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

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

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 3, the battery includes: the shell structure 10, the shell structure 10 is provided with a through hole 11 penetrating through the shell structure 10; a pole 20, at least part of the pole 20 being arranged in the through hole 11; the glass transition temperature of the hard sealing element 30 is 300-600 ℃, and at least part of the hard sealing element 30 is arranged in the through hole 11 so as to seal the pole 20 and the shell structure 10; wherein the housing structure 10 is provided with a buffer reservoir 12.

The utility model discloses a battery of an embodiment includes shell structure 10, utmost point post 20 and stereoplasm sealing member 30, utmost point post 20 wears to locate in shell structure 10's perforation 11, and stereoplasm sealing member 30's at least part sets up in perforation 11 to can make stereoplasm sealing member 30 realize the effective seal to utmost point post 20 and shell structure 10, because stereoplasm sealing member 30's hardness is great, be difficult to appear ageing deformation scheduling problem, thereby can improve the sealing performance of stereoplasm sealing member 30 between to utmost point post 20 and shell structure 10. By providing the buffer groove 12 on the housing structure 10, the force generated by the housing structure 10 during the vibration process can be absorbed, so that the risk of the hard sealing member 30 breaking due to the vibration of the housing structure 10 can be avoided, and the risk of the hard sealing member 30 failing can be avoided, thereby improving the safety performance of the battery.

It should be noted that, in the related art, a rubber member is used to achieve sealing between the pole and the housing structure. However, the rubber member may suffer from aging deformation and the like after long-term use, thereby causing problems such as seal failure, and in the present embodiment, by sealing the pole post 20 and the housing structure 10 with the hard seal member 30, not only effective sealing of the pole post 20 and the housing structure 10 by the hard seal member 30 at the initial stage of use can be ensured, but also problems such as aging and the like are not easily caused in the hard seal member 30 after long-term use of the battery, and therefore, the problem of seal failure between the pole post 20 and the housing structure 10 due to changes in the structural properties of the hard seal member 30 itself is not caused.

The hard sealing member 30 has a high hardness, and the hard sealing member 30 is not prone to aging and other problems, and accordingly, the hard sealing member 30 is brittle, so that the mechanical impact resistance of the hard sealing member 30 may be relatively low, and therefore, it is necessary to avoid a large impact force generated by vibration during the use of the battery. In this embodiment, by providing the buffer groove 12 on the housing structure 10, even if the battery has vibration and other problems during use, the buffer groove 12 can also effectively absorb the vibration force, so that the hard sealing member 30 can be prevented from cracking and other problems due to the vibration of the battery, and the sealing performance of the hard sealing member 30 can be improved.

The housing structure 10 is provided with the buffer groove 12, that is, when the housing structure 10 vibrates, the buffer groove 12 can effectively absorb the vibration force, so as to reduce the external force applied to the hard sealing member 30 by the housing structure 10 to the maximum extent, thereby avoiding the problem that the hard sealing member 30 is damaged due to over brittleness, and ensuring the sealing performance of the hard sealing member 30.

The hard sealing member 30 may be glass, glass ceramic, or other glass or ceramic matrix composite, which is not limited herein, so as to ensure that the hard sealing member 30 may have reliable hardness, thereby avoiding the problems of aging, etc., although the hard sealing member 30 is brittle, due to the arrangement of the buffer groove 12, the external force applied to the hard sealing member 30 during the vibration process of the housing structure 10 may be effectively absorbed, thereby effectively protecting the hard sealing member 30.

The glass transition temperature of the hard sealing member 30 is 300 ℃ to 600 ℃, that is, the temperature at which the hard sealing member 30 starts to soften is 300 ℃ to 600 ℃, and the temperature is relatively high, so that the hard sealing member 30 is not easy to soften, and the problem of sealing failure in the use process of the battery can be avoided.

In one embodiment, the depth of the buffer groove 12 is not less than half of the thickness of the housing structure 10, so that the buffer groove 12 can have reliable vibration absorption capability, thereby avoiding large vibration force generated during the use of the battery, and thus effectively protecting the hard seal 30, thereby improving the sealing performance of the hard seal 30.

In one embodiment, the depth of the buffer groove 12 is not more than three-quarters of the thickness of the housing structure 10, so that the problem that the buffer groove 12 is too deep to reduce the structural strength of the housing structure 10 can be avoided, thereby ensuring the safety performance of the battery.

It should be noted that the depth of the buffer slot 12 is not less than half of the thickness of the casing structure 10, and the depth of the buffer slot 12 is not more than three-fourths of the thickness of the casing structure 10, which not only can ensure the shock absorbing capability of the buffer slot 12, but also can avoid the problem that the structural strength of the casing structure 10 is low due to the too small thickness of the casing structure 10, thereby improving the safety use performance of the battery.

In one embodiment, the distance between the buffer groove 12 and the circumferential outer surface of the outer shell structure 10 is smaller than the distance between the buffer groove 12 and the hole wall of the through hole 11, so that the buffer groove 12 can effectively absorb the vibration generated by the circumferential outer edge of the outer shell structure 10, the vibration force can be effectively prevented from being transmitted to the hard sealing element 30 in the through hole 11, the problem that the hard sealing element 30 is damaged due to stress can be avoided, and the sealing performance of the hard sealing element 30 is guaranteed.

In one embodiment, as shown in fig. 2, the distance between the buffer groove 12 and the circumferential outer surface of the housing structure 10 is less than one fifth of the distance between the buffer groove 12 and the wall of the through hole 11, so that the buffer groove 12 can be maximally close to the circumferential outer edge of the housing structure 10, thereby maximally absorbing the vibration force, reducing the risk of the vibration force being transmitted to the hard seal 30 in the through hole 11, and further ensuring that the hard seal 30 is not damaged.

In one embodiment, the buffer groove 12 is disposed around the through hole 11, so that the shock absorbing capability of the buffer groove 12 can be improved, thereby effectively protecting the hard seal 30 and further avoiding the problem of seal failure of the hard seal 30.

In one embodiment, the buffer groove 12 is a circumferential closed structure, so that the buffer groove 12 can surround the through hole 11 completely, the hard sealing element 30 is protected comprehensively, the hard sealing element 30 is prevented from being damaged due to the action of vibration force, and the sealing performance of the hard sealing element 30 is guaranteed.

In one embodiment, the hard seal 30 may be an annular seal structure, thereby serving to reliably seal the pole 20 and the housing structure 10 and avoiding problems such as seal failure between the pole 20 and the housing structure 10.

The through hole 11 may be a polygonal hole, for example, the through hole 11 may be a square hole, and the circumferential outer surface of the annular sealing structure formed by the hard seal 30 may be rectangular, and the portion of the pole 20 located in the through hole 11 may be a cylindrical structure, or the portion of the pole 20 located in the through hole 11 may be a rectangular structure, and the like, which is not limited herein.

In one embodiment, the hard sealing member 30 includes a circular sealing structure, which is not only simple in structure, but also can realize reliable sealing between the terminal post 20 and the housing structure 10, and the circular sealing structure is not easy to form stress concentration, so as to prevent the hard sealing member 30 from being damaged by mechanical impact force, so as to ensure the structural strength of the hard sealing member 30, and further ensure reliable sealing of the hard sealing member 30 to the housing structure 10 and the terminal post 20.

It should be noted that it is not excluded that the buffer groove 12 may be a circumferentially unsealed structure, for example, the buffer groove 12 may be a plurality of buffer grooves, and the plurality of buffer grooves 12 may be a structure provided at intervals along the circumferential direction of the penetration hole 11.

In one embodiment, the opening area of the buffer slot 12 is larger than the bottom area of the buffer slot 12, which not only facilitates the structural formation of the buffer slot 12, but also prevents the internal strength of the housing structure 10 from being too low, thereby ensuring the structural strength of the housing structure 10, and the buffer slot 12 can also effectively absorb the vibration, so as to protect the hard sealing element 30 in the through hole 11 from being damaged.

The longitudinal section of the buffer container 12 may be substantially triangular, and the wall surface of the longitudinal section of the buffer container 12 may include a plane or a curved surface, which is not limited herein.

It should be noted that the buffer slot 12 may also be a rectangular slot, an arc slot, etc., and is not limited herein.

In one embodiment, the hard seal 30 comprises glass, ceramic or glass ceramic, thereby avoiding the aging problem of the hard seal 30, and by providing the buffer groove 12 on the housing structure 10, the damage and the like of the hard seal 30 can be avoided, thereby ensuring the sealing performance of the hard seal 30.

In one embodiment, as shown in fig. 1, the housing structure 10 includes a first housing part 13 and a second housing part 14 connected to each other, the through hole 11 is disposed on the first housing part 13, the first housing part 13 is a flat plate, and the second housing part 14 is formed with a containing cavity, that is, the terminal 20 can be disposed on the flat plate, which is not only simple in structure, but also facilitates disposing the terminal 20 on the housing structure 10, thereby improving the installation efficiency of the battery.

In one embodiment, as shown in FIG. 2, a majority of the thickness of the plate may be uniform, while a portion of the thickness at the edge of the plate may be relatively thin, thereby facilitating the formation of a connection between the plate and the second housing member 14.

In one embodiment, as shown in fig. 3, the flat plate includes a first portion 131 and a second portion 132 connected to each other, the thickness of the first portion 131 is greater than that of the second portion 132, the second portion 132 is disposed around the first portion 131, and both the through hole 11 and the buffer slot 12 are disposed on the first portion, which not only reduces the overall weight of the housing structure 10, but also ensures that the pole 20 can have a reliable supporting surface to prevent the housing structure 10 from being damaged by stress.

In one embodiment, the distance between the buffer groove 12 and the second portion is smaller than the distance between the buffer groove 12 and the wall of the through hole 11, so that the buffer groove 12 can be disposed close to the second portion, and the vibration force generated by the battery can be sufficiently absorbed, thereby effectively protecting the hard seal 30 from being damaged.

In one embodiment, the first housing part 13 may be formed with a receiving cavity and the second housing part 14 may be formed with a receiving cavity, and the pole 20 may be provided on the first housing part 13 or the second housing part 14. Alternatively, the pole 20 may be two, and the two poles 20 may be respectively disposed on the first housing member 13 and the second housing member 14.

It should be noted that the number of the pole posts 20 may be one, one pole post 20 may be electrically connected to one tab of the battery cell, and the other tab of the battery cell may be electrically connected to the casing structure 10, at this time, the casing structure 10 may be disposed in an insulating manner with the pole post 20. The number of poles 20 may be two, and the two poles 20 may be disposed on the same side of the housing structure 10, for example, both poles 20 may be disposed on a flat plate. Alternatively, the two poles 20 may be respectively disposed on opposite sides of the housing structure 10.

In one embodiment, the housing structure 10 is a metal member, so as to ensure the structural strength of the housing structure 10, and the arrangement of the hard seal 30 can be facilitated, so as to improve the reliable sealing of the hard seal 30 between the pole 20 and the housing structure 10.

The housing structure 10 may be steel, aluminum, copper, or a composite structure of the above-mentioned metal materials, which is not limited herein.

It should be noted that the first housing member 13 and the second housing member 14 may be provided independently. In some embodiments, it is not excluded that the first housing part 13 and the second housing part 14 can be a one-piece structure, the space for accommodating the cell being formed by stamping and subsequently being connected closed by welding.

In one embodiment, the hard sealing member 30 is thermally melted in the through hole 11, so that the hard sealing member 30 can be ensured to reliably seal the pole 20 and the housing structure 10, and the manufacturing and installation efficiency of the hard sealing member 30 can be improved, thereby improving the installation efficiency of the battery.

In one embodiment, the battery may further include a battery cell disposed in the housing structure 10, and the battery cell may be electrically connected to the housing structure 10, or the battery cell may be connected to the terminal 20 on the housing structure 10.

Note that the battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. And when the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active materials.

In one embodiment, the battery may be a prismatic battery, that is, the battery may be a prismatic battery, which mainly refers to a straight line whose shape is a prism, but does not strictly limit whether each edge of the prism is strictly defined, and the corner between the edges is not necessarily a right angle, and may be an arc transition.

The battery can be the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Or, the battery may be a winding battery, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

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

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

The utility model discloses a group battery of embodiment includes the battery, and the battery includes shell structure 10, utmost point post 20 and stereoplasm sealing member 30, utmost point post 20 wear to locate in shell structure 10's perforation 11, and stereoplasm sealing member 30's at least part sets up in perforation 11 to can make stereoplasm sealing member 30 realize the effective seal to utmost point post 20 and shell structure 10, because stereoplasm sealing member 30's hardness is great, be difficult to appear ageing deformation scheduling problem, thereby can improve the sealing performance of stereoplasm sealing member 30 between to utmost point post 20 and shell structure 10. By providing the buffer groove 12 on the housing structure 10, the force generated by the housing structure 10 during the vibration process can be absorbed, so that the risk of the hard sealing member 30 being broken due to the vibration of the housing structure 10 can be avoided, and the risk of the hard sealing member 30 failing can be avoided, thereby improving the safety performance of the battery pack.

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

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack includes a plurality of batteries and a case for fixing the plurality of batteries.

It should be noted that, the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

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

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

Claims

1. A battery, comprising:

the shell structure (10), the shell structure (10) is provided with a through hole (11) penetrating through the shell structure (10);

an electrode post (20), at least part of the electrode post (20) being arranged within the perforation (11);

a hard seal (30), the glass transition temperature of the hard seal (30) being between 300 ℃ and 600 ℃, at least part of the hard seal (30) being arranged within the perforation (11) to seal the pole (20) and the housing structure (10);

wherein, a buffer groove (12) is arranged on the shell structure (10).

2. The battery according to claim 1, characterized in that the depth of the buffer reservoir (12) is not less than half the thickness of the housing structure (10).

3. The battery according to claim 2, characterized in that the depth of the buffer groove (12) is not more than three quarters of the thickness of the housing structure (10).

4. The battery according to claim 1, characterized in that the distance between the buffer reservoir (12) and the circumferential outer surface of the housing structure (10) is smaller than the distance between the buffer reservoir (12) and the wall of the bore (11).

5. The battery according to claim 4, characterized in that the distance between the buffer groove (12) and the circumferential outer surface of the housing structure (10) is less than one fifth of the distance between the buffer groove (12) and the wall of the bore (11).

6. The battery according to claim 1, characterized in that the buffer groove (12) is arranged around the perforation (11).

7. The battery according to claim 6, characterized in that the buffer tank (12) is a circumferentially closed structure.

8. The battery according to claim 1, wherein the opening area of the buffer container (12) is larger than the bottom surface area of the buffer container (12).

9. The battery according to any one of claims 1 to 8, characterized in that the housing structure (10) comprises a first housing part (13) and a second housing part (14) which are connected, the perforation (11) being provided on the first housing part (13), the first housing part (13) being a flat plate, the second housing part (14) being formed with a receiving cavity;

wherein the flat plate comprises a first part (131) and a second part (132) which are connected, the thickness of the first part (131) is larger than that of the second part (132), the second part (132) is arranged around the first part (131), and the through hole (11) and the buffer groove (12) are arranged on the first part (131).

10. The battery according to claim 9, characterized in that the distance between the buffer groove (12) and the second portion (132) is smaller than the distance between the buffer groove (12) and the wall of the through hole (11).

11. The battery according to any one of claims 1 to 8, wherein the battery is a cylindrical battery.