CN219419392U - Battery shell and battery device - Google Patents
Battery shell and battery device Download PDFInfo
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- CN219419392U CN219419392U CN202320774858.8U CN202320774858U CN219419392U CN 219419392 U CN219419392 U CN 219419392U CN 202320774858 U CN202320774858 U CN 202320774858U CN 219419392 U CN219419392 U CN 219419392U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to the technical field of batteries, and provides a battery shell and a battery device. The battery case includes: the battery cell comprises a body for accommodating a battery cell, wherein the body is provided with a thinning area, and the surface of one side of the thinning area, which is away from the battery cell, is used as a thinning cutting surface; the ratio of the maximum thickness of the thinning area to the thickness of the body in the residual area is 5-50%; an explosion-proof structure is arranged in the thinning area and comprises a sinking table and a protruding part, wherein the sinking table sinks from the thinning cutting surface to the direction close to the battery cell; the sinking platform is connected with the protruding part, and the sinking platform is arranged around the protruding part; the protruding portion protrudes in a direction away from the battery cell. The battery shell provides an integrated forming technology of the battery shell and the explosion-proof structure, so that the space utilization rate of the inside of the battery shell can be improved, the explosion-proof structure can be ensured to be effectively opened under preset pressure, and the safety performance of the battery is improved.
Description
Technical Field
The present disclosure relates to battery technology, and particularly to a battery housing and a battery device.
Background
The prior battery device comprises a battery shell and an electric core, wherein the electric core is arranged inside the battery shell. The explosion-proof structure is arranged on the battery shell, so that when the internal pressure of the battery shell reaches a certain value, the pressure is relieved through the explosion-proof structure, and the safety performance of the battery is guaranteed.
When the battery shell is specifically arranged, the body of the battery shell and the explosion-proof structure are of an assembled structure or an integrally formed structure. In the integrated formation type of the existing battery shell and the explosion-proof structure, the explosion-proof structure occupies the internal space of the battery shell, so that the space utilization rate is reduced; and the explosion pressure of the explosion-proof structure is unstable, so that the situation that the explosion-proof structure cannot be normally exploded under the preset pressure easily occurs, and the safety performance of the battery is influenced.
Disclosure of Invention
The utility model provides a battery shell and a battery device, and the battery shell provides an integrated forming technology of the battery shell and an explosion-proof structure, so that the space utilization rate of the inside of the battery shell can be improved, and the explosion-proof structure can be ensured to be effectively opened under preset pressure so as to improve the safety performance of a battery.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
according to a first aspect of the present utility model, there is provided a battery case comprising: the battery cell comprises a body for accommodating a battery cell, wherein the body is provided with a thinning area, and the surface of one side of the thinning area, which is away from the battery cell, is used as a thinning cutting surface; the ratio of the maximum thickness of the thinning area to the thickness of the body in the residual area is 5-50%;
an explosion-proof structure is arranged in the thinning area and comprises a sinking table and a protruding part, wherein the sinking table sinks from the thinning cutting surface to the direction close to the battery cell; the sinking platform is connected with the protruding part, and the sinking platform is arranged around the protruding part; the protruding portion protrudes in a direction away from the battery cell.
In the battery shell, the body is provided with the thinning area, and the surface of one side of the thinning area, which is away from the battery core, is used as a thinning cutting surface; the maximum thickness of the thinning area is 5% -50% of the thickness of the body in the residual area; when the pressure in the battery shell reaches a certain value, the explosion-proof structure in the thinning area forms a weak point so as to release pressure; specifically, the explosion-proof structure comprises a sinking platform sinking towards the battery core from the thinning cutting surface and a protruding part protruding towards the direction opposite to the battery core, and the sinking platform is connected with the protruding part and is arranged around the protruding part.
It should be noted that, the battery shell provided by the application is stretched through the forming of the sinking table and the protruding part in the explosion-proof structure, so that the wall thickness of the thinned area can be further reduced, and the local position in the explosion-proof structure can meet the wall thickness requirement of the weak point used as the explosion, so that the explosion-proof structure is ensured to be effectively opened under the preset pressure, and the safety performance of the battery is improved; and moreover, the forming of the sinking table and the protruding part in the explosion-proof structure is stretched, the integrated structural design between the explosion-proof structure and the battery shell can be met, the number of isolated structural members can be reduced, the preparation difficulty of the battery shell is reduced, and the assembly efficiency is improved.
Simultaneously, the battery shell that this application provided is through sinking platform and bulge cooperation in the explosion-proof structure, can reduce the explosion-proof structure and sink the epaxial occupation space of direction or bulge epirelief in the platform, promotes the inside space utilization of battery shell to and reduce the external dimension of this battery shell.
According to a second aspect of the present utility model, there is provided a battery device comprising a battery cell and a battery case as provided in any of the above first aspect, the battery cell being disposed inside the battery case.
In the battery device provided by the application, the battery shell is formed and stretched through the sinking table and the protruding part in the explosion-proof structure, so that the wall thickness of the thinned area can be further reduced, the local position in the explosion-proof structure can meet the wall thickness requirement of the weak point used as the explosion, the explosion-proof structure is effectively opened under the preset pressure, and the safety performance of the battery is improved; and moreover, the forming of the sinking table and the protruding part in the explosion-proof structure is stretched, the integrated structural design between the explosion-proof structure and the battery shell can be met, the number of isolated structural members can be reduced, the preparation difficulty of the battery shell is reduced, and the assembly efficiency is improved.
Meanwhile, in the battery device provided by the application, the battery shell is matched with the protruding part through the sinking table in the explosion-proof structure, so that the occupied space of the explosion-proof structure in the sinking direction of the sinking table or the protruding direction of the protruding part can be reduced, the space utilization rate of the inside of the battery shell is improved, and the external size of the battery shell and even the battery device is reduced.
Drawings
For a better understanding of the present application, 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 application. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:
fig. 1 is a schematic perspective view of a battery case according to an embodiment of the present disclosure;
FIG. 2 is an enlarged schematic view of M in FIG. 1;
fig. 3 and fig. 4 are schematic views of a thinned cutting surface according to an embodiment of the present application;
FIG. 5 is a cross-sectional view of the structure of FIG. 1;
fig. 6 is an enlarged schematic view of the cross-sectional view of fig. 5.
The reference numerals are explained as follows:
100. a body; 110. thinning the area; 120. an explosion-proof structure; 121. a sinking platform; 122. a protruding portion; 1221. an upper convex section; 1222. a transition section; 1223. a boss; s is S 1 Large surface; s is S 2 A side surface; A. an explosion-proof surface; and P, thinning the cutting surface.
Detailed Description
The technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present application, 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 application.
In the description of the present application, 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 unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; 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 likewise intended to mean one of a possible plurality of such objects.
Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present application can be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, which are described in the exemplary embodiments of the present application, are described with the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present application. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.
The embodiment of the application provides a battery shell, and the battery shell is used for accommodating an electric core. Fig. 1 is a schematic perspective view of a battery case according to an embodiment of the present disclosure; FIG. 2 is an enlarged schematic view of M in FIG. 1;
fig. 3 and fig. 4 are schematic views of a thinned cutting surface according to an embodiment of the present application; fig. 5 is a cross-sectional view of the structure of fig. 1. Referring to the structure shown in fig. 1 to 5, a battery device provided in an embodiment of the present application includes: the body 100 is used for accommodating the battery cell, the body 100 is provided with a thinning area 110, and the surface of one side of the thinning area 110, which is away from the battery cell, is used as a thinning cutting surface P; the ratio of the maximum thickness of the thinned region 110 to the thickness of the body 100 in the remaining region ranges from 5% to 50%;
an explosion-proof structure 120 is arranged in the thinning area 110, the explosion-proof structure 120 comprises a sinking table 121 and a protruding part 122, and the sinking table 121 sinks from the thinning cutting surface P to the direction approaching the battery cell; the sinking platform 121 is connected with the protruding part 122, and the sinking platform 121 is arranged around the protruding part 122; the protruding portion 122 protrudes in a direction away from the cell.
In this embodiment, as shown in fig. 1 and fig. 2, the body 100 is provided with a thinned region 110, and a side surface of the thinned region 110 facing away from the battery cell is used as a thinned cutting surface P; and as shown in FIG. 5, the thickness d of the thinned region 110 1 D, the thickness of the body 100 in the remaining area 2 5% -50% of (3). It should be appreciated that the thickness of the thinned region 110 may be non-uniform, with some locations being thicker and some locations being thinner, but that the thickness of the thinned region 110 throughout is within the above-described range.
For a clearer understanding of the thinned region 110 and the thinned cutting surface P, please refer to the structure shown in fig. 3 in conjunction with fig. 1, 2 and 5, when the thinned region 110 is formed by the body 100, a layer with a certain thickness is removed from the side surface of the body 100 facing away from the battery core to the inner surface to form a concave step, namely the thinned region 110 in the initial form, and the thinned region 110 facing away from the side surface of the battery core forms the thinned cutting surface P; in a subsequent step, as shown in fig. 4, the explosion proof structure 120 is drawn in a form of a thin section 110, at which time the thin cut surface P is shown in a broken line.
When the pressure in the battery shell reaches a certain value, the explosion-proof structure 120 in the thinning area 110 forms a weak point for pressure relief; specifically, the explosion-proof structure 120 includes a sinking platform 121 sinking toward the battery cell and a protruding portion 122 protruding toward the direction away from the battery cell, and the sinking platform 121 is connected to the protruding portion 122 and is disposed around the protruding portion 122. For example, please continue to combine the structures shown in fig. 1 to 5, when the explosion-proof structure 120 is formed in the thinned region 110, a convex hull is first pressed onto the cell side to form the sinking stage 121; then, another convex hull is pressed out on the convex hull formed before in the direction of facing away from the cell side to form the convex portion 122.
It should be noted that, the battery housing provided in this embodiment of the present application is stretched by molding the sinking table 121 and the protruding portion 122 in the explosion-proof structure 120, so that the wall thickness of the thinned area 110 can be further reduced, so that the local position in the explosion-proof structure 120 can meet the wall thickness requirement of the weak point as explosion, so as to ensure that the explosion-proof structure 120 is effectively opened under the preset pressure, and improve the safety performance of the battery; and, the shaping of sunk platform 121 and bulge 122 in the explosion-proof structure 120 is tensile, can also satisfy the integrated into one piece's between explosion-proof structure 120 and the battery case structural design, can reduce isolated structure number, reduces the preparation degree of difficulty of battery case, promotes assembly efficiency.
In the conventional structure, the single-directional sinking or protruding structure increases the occupied size of the explosion-proof structure 120 in the height direction. Meanwhile, the battery housing provided in the embodiment of the application is matched with the protrusion 122 through the sinking table 121 in the explosion-proof structure 120, so that the occupied space of the explosion-proof structure 120 in the sinking direction of the sinking table 121 or the protruding direction of the protrusion 122 can be reduced, the space utilization rate of the inside of the battery housing is improved, and the external size of the battery housing is reduced.
With continued reference to the structure shown in fig. 1, in the exemplary embodiment, the body 100 has a square structure with two large faces S disposed opposite to each other 1 And four sides S 2 Four sides S 2 Sequentially connecting and sealing two large surfaces S 1 An opening in the compartment; four sides S 2 And two large faces S 1 Is provided with a thinned region 110. It is noted that the face provided with the thinned region 110 serves as the explosion-proof face a of the housing (as shown in fig. 1).
With continued reference to the structure shown in fig. 1, when the position of the explosion-proof surface a is specifically set, the explosion-proof surface a may be selected to be set on the bottom surface of the battery case. Specifically, when the battery case is placed inside the case, the side surface S2 of the battery case facing the bottom side of the case is referred to as the "bottom surface" of the battery case, and correspondingly, the side surface S2 of the battery case facing away from the bottom side of the case is referred to as the "top surface" of the battery case. It should be noted that, because the battery housing is disposed with the electrical components and other structures on the side facing away from the bottom, the explosion-proof surface a is disposed on the bottom surface of the battery housing, so that the operation state of other electrical components can be prevented from being affected when the explosion-proof structure 120 leaks, and the safety performance of the battery device using the battery housing can be improved.
Of course, the body 100 may also be cylindrical to form a cylindrical battery, and the explosion-proof surface a may be an annular surface or two side end surfaces of the cylindrical battery, which is not described in detail.
In one embodiment, FIG. 6 is an enlarged schematic view of the cross-sectional view of FIG. 5, please refer to the structure shown in FIG. 6, the sinking dimension h of the sinking table 121 1 Not more than 1mm, sinking dimension h 1 Is the vertical distance between the surface of the sinking stage 121 facing the side of the cell and the surface of the body 100 on the side of the remaining area facing the cell.
It should be noted that, when the explosion-proof structure 120 is located on the bottom surface or the top surface of the battery housing, the sinking dimension of the sinking platform 121 occupies the internal space of the battery housing, and is not beneficial to the improvement of the volumetric energy density of the battery, and the stretching and thinning of the wall thickness of the battery housing are not beneficial to the undersize. Thus, when setting the sinking dimension h of the sinking table 121 1 When the diameter is not more than 1mm, the two problems can be well balanced.
In one embodiment, please continue with the structure shown in fig. 6, the width L of the sinking table 121 is in the range of 0.5mm or more.
It should be understood that, since the sinking platform 121 is formed by stretching, the battery housing forms a concave structure on the other surface corresponding to the sinking platform 121, and when the explosion-proof structure 120 is opened, the concave structure provides a certain air release space for releasing air, and meanwhile, the concave structure provides a certain air flow channel for releasing air, so that the released air cannot directly impact the battery housing.
It is noted that, when the sinking platform 121 is formed by stretching, the concave structure is formed synchronously, the width of the sinking platform 121 affects the width of the concave structure, and by controlling the width L of the sinking platform 121 to be greater than or equal to 0.5mm, the volume of the air leakage space formed by the concave structure can be ensured to meet the requirement, so as to improve the safety performance of the battery using the battery shell.
In one embodiment, with continued reference to the structure shown in fig. 5 and 6, the protrusion 122 protrudes beyond the thinned cutting plane P on a side surface facing away from the cell. In this embodiment, the protruding portion 122 has a larger protruding dimension on the side facing away from the battery, which can effectively reduce the wall thickness of the thinning region 110 by forming and stretching the sinking table 121 and the protruding portion 122 in the explosion-proof structure 120, and can reserve a larger storage space for the protruding portion 122 on the side facing the battery cell.
In one embodiment, the side surface of the protrusion 122 facing away from the battery cell does not exceed the side surface of the body 100 facing away from the battery cell in the remaining area.
In the present embodiment, along the protruding direction of the protruding portion 122, the protruding portion 122 and the body 100 have a gap between the remaining area (illustrated as the explosion-proof surface a). When the battery case is placed inside the case, if the explosion-proof surface a is the bottom surface of the battery case, a gap may be provided between the protrusion 122 and the bottom of the case to prevent the explosion-proof structure 120 from being pressed.
In addition, it should be noted that, in order to ensure the safety performance of the battery, the surface of the explosion-proof structure 120 may be adhered with a protective film, and by setting the protruding portion 122 not to exceed the surface of the side of the explosion-proof surface a facing away from the battery core, the protective film may be adhered to the surface of the explosion-proof structure 120.
In a specific embodiment, the distance between the side surface of the protrusion 122 facing away from the cell and the side surface of the body 100 facing away from the cell in the remaining area is greater than 0.1mm.
It should be noted that, in this embodiment, the distance between the protruding portion 122 and the body 100 in the remaining area is greater than 0.1mm, so as to protect the protruding portion 122, and meanwhile, the stretching height of the protruding portion 122 may be ensured, so that the wall thickness of the thinned area 110 is effectively reduced, and the local position of the thinned area 110 meets the wall thickness requirement of the weak point as a blasting, thereby integrally forming the explosion-proof structure 120 and the battery case.
In one embodiment, with continued reference to the structure illustrated in fig. 5 and 6, the projection 122 includes an upper convex segment 1221, a transition segment 1222, and a boss 1223 connected in sequence, the upper convex segment 1221 being connected to the sink deck 121; and the protruding portion 122 is an integrally formed structure.
It should be noted that, during the process of forming the protruding portion 122 by stamping or other processes, the protruding portion 1221, the transition portion 1222 and the boss 1223 are integrally formed, so that on one hand, the preparation process can be simplified, the preparation efficiency can be improved, on the other hand, the connection strength between the structures of the protruding portion 122 can be improved, the pressure relief operation of the explosion-proof structure 120 can be ensured under the preset condition, and the safety performance of the battery can be improved.
In one embodiment, please continue to refer to the structure illustrated in fig. 5 and 6, the sinking dimension h of the sinking table 121 1 The distance between the side surface of the boss 1223 facing the cell and the side surface of the counter 121 facing the cell is h 2 ，h 1 And h 2 The difference range of (2) is: 0 mm-3 mm.
It should be appreciated that the protruding dimension of the protruding portion 122 may affect the overall volume of the battery case, and thus affect the space occupied by the battery case in the case, and that an excessive protruding dimension of the protruding portion 122 is not beneficial to the improvement of the energy density of the battery volume, and that an undersize protruding is not beneficial to the stretching and thinning of the wall thickness of the battery case.
H is the same as that of the 1 And h 2 The ratio range of (1) affects the forming and stretching effects of the sinking table 121 and the protruding part 122, when setting h 1 /h 2 The difference range of (2) is: the thickness of the wall of the weak point of blasting can be better met at the local position of the thinning area 110 by 0 mm-3 mm, so that the weak point can be timely decompressed when the pressure in the battery shell reaches a preset value, and the safety performance of the battery is improved.
In one embodiment, with continued reference to the configuration shown in FIG. 6, the transition 1222 forms a first weak point for pressure relief.
It should be noted that, when the protrusion 122 is stretch-formed, the transition portion 1222 becomes thinner, which can be used as a first weak point to control the pressure release operation of the battery case at a predetermined position.
It should be noted that after the gas is depressurized through the first weak point, the part of the gas may enter the corresponding concave structure of the sinking platform 121, even enter the space inside the box through the gap between the remaining area of the body 100 and the box, so as to achieve the pressure-relieving effect.
In one embodiment, with continued reference to the structure shown in FIG. 6, the transition 1222 has a thickness in the range of 0.05mm to 0.15mm.
It should be noted that, if the thickness of the transition section 1222 is too thick, the transition section 1222 is not beneficial to form the first weak point; if the thickness of the transition section 1222 is too thin, it is not beneficial to form the protrusion 122 by punching, and it is very easy to break during punching, even during battery use, and the service life of the battery is very easy to be affected.
In one embodiment, please continue with the structure shown in fig. 6, the upper protruding section 1221 is connected to the sinking platform 121, and the connection position of the upper protruding section 1221 and the sinking platform 121 is provided with a second weak point.
It should be noted that, the second weak point may be used as an alternative pressure release point of the first weak point to prevent the burst pressure at the first weak point from being unstable, and if the threshold pressure of the gas inside the battery case is too high, the second weak point may be ruptured, thereby completing the pressure release operation and further improving the safety performance of the battery.
In one embodiment, the side surface of the boss 1223 facing away from the cell is provided with a first score.
It should be noted that the first notch will burst when receiving pressure, so as to control burst pressure conveniently, so as to improve the safety performance of the battery.
In one embodiment, the surface of the sinking stage 121 facing away from the battery cell is provided with a second notch.
It should be noted that the second nick will burst when receiving pressure, be convenient for control burst pressure to promote the security performance of battery.
In a second aspect, embodiments of the present application provide a battery device. The battery device comprises an electric core and a battery shell provided by any technical scheme in the first aspect, wherein the electric core is arranged in the battery shell. It should be understood that the battery case is further filled with electrolyte and the like, and detailed descriptions thereof are omitted herein.
It should be noted that, in the battery provided in this embodiment of the present application, the battery shell is stretched by molding the sinking table 121 and the protruding portion 122 in the explosion-proof structure 120, so that the wall thickness of the thinned area 110 can be further reduced, so that the local position in the explosion-proof structure 120 can meet the wall thickness requirement of the weak point as explosion, so as to ensure that the explosion-proof structure 120 is effectively opened under the preset pressure, and improve the safety performance of the battery; and, the shaping of sunk platform 121 and bulge 122 in the explosion-proof structure 120 is tensile, can also satisfy the integrated into one piece's between explosion-proof structure 120 and the battery case structural design, can reduce isolated structure number, reduces the preparation degree of difficulty of battery case, promotes assembly efficiency.
Meanwhile, in the battery device provided by the embodiment of the application, the battery shell is matched with the protrusion 122 through the sinking table 121 in the explosion-proof structure 120, so that the occupied space of the explosion-proof structure 120 in the sinking direction of the sinking table 121 or the protruding direction of the protrusion 122 can be reduced, the space utilization rate of the inside of the battery shell is improved, and the external size of the battery shell, even the battery device, is reduced.
In one embodiment, the battery device may be disposed in a case, and the explosion-proof structure 120 of the battery case in the battery device is located at a side surface of the battery device facing the bottom of the case.
The structure arrangement can reduce the occupied space of the explosion-proof structure 120 in the height direction of the box body, and reduce the external size of the battery shell, even the battery device, so as to improve the space utilization rate in the box body.
Other embodiments of the present application will be 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 variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the application being indicated by the following claims. It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of protection of the application is limited only by the claims that follow.
Claims (12)
1. A battery case, comprising: the battery cell comprises a body for accommodating a battery cell, wherein the body is provided with a thinning area, and the surface of one side of the thinning area, which is away from the battery cell, is used as a thinning cutting surface; the ratio of the maximum thickness of the thinning area to the thickness of the body in the residual area is 5-50%;
an explosion-proof structure is arranged in the thinning area and comprises a sinking table and a protruding part, wherein the sinking table sinks from the thinning cutting surface to the direction close to the battery cell; the sinking platform is connected with the protruding part, and the sinking platform is arranged around the protruding part; the protruding portion protrudes in a direction away from the battery cell.
2. The battery case according to claim 1, wherein a sinking dimension of the sinking stage, which is a vertical distance between a surface of a side of the sinking stage facing the battery cell and a surface of a side of the body facing the battery cell in a remaining region, is not more than 1mm.
3. The battery housing of claim 2, wherein the sink deck has a width of 0.5mm or more.
4. The battery housing of claim 1, wherein the projection protrudes beyond the thinned cutting surface on a side surface facing away from the cell.
5. The battery housing of claim 4, wherein a side surface of the protrusion facing away from the cell does not exceed a side surface of the body facing away from the cell in the remaining area.
6. The battery housing of claim 5, wherein a distance between a side surface of the protrusion facing away from the cell and a side surface of the body facing away from the cell in the remaining area is greater than 0.1mm.
7. The battery housing of any one of claims 2-6, wherein the projection is of integrally formed type construction; the bulge includes last protruding section, changeover portion and boss that connect gradually, wherein:
the upper convex section is connected with the sinking platform;
the transition section forms a first weak point for pressure relief; the thickness range of the transition section is 0.05 mm-0.15 mm.
8. The battery housing of claim 7, wherein a sinking dimension h of the sinking table 1 The distance between the side surface of the boss facing the battery cell and the side surface of the sinking table facing the battery cell is h 2 ，h 1 And h 2 The difference range of (2) is: 0 mm-3 mm.
9. The battery housing of claim 7, wherein the upper protruding section is connected to the sink deck, and wherein a second weak point is provided at a connection location of the upper protruding section to the sink deck.
10. The battery housing of claim 7, wherein a side surface of the boss facing away from the cell is provided with a first score.
11. The battery housing of claim 7, wherein the counter sink has a second score on a side surface facing away from the cell.
12. A battery device comprising a battery cell and a battery housing according to any one of claims 1-11, the battery cell being disposed inside the battery housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320774858.8U CN219419392U (en) | 2023-04-10 | 2023-04-10 | Battery shell and battery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320774858.8U CN219419392U (en) | 2023-04-10 | 2023-04-10 | Battery shell and battery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219419392U true CN219419392U (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320774858.8U Active CN219419392U (en) | 2023-04-10 | 2023-04-10 | Battery shell and battery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219419392U (en) |
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2023
- 2023-04-10 CN CN202320774858.8U patent/CN219419392U/en active Active
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