CN116979190A - Housing assembly, battery pack and energy storage device - Google Patents
Housing assembly, battery pack and energy storage device Download PDFInfo
- Publication number
- CN116979190A CN116979190A CN202310615927.5A CN202310615927A CN116979190A CN 116979190 A CN116979190 A CN 116979190A CN 202310615927 A CN202310615927 A CN 202310615927A CN 116979190 A CN116979190 A CN 116979190A
- Authority
- CN
- China
- Prior art keywords
- shell
- thickness
- end cover
- housing
- housing assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 16
- 230000009467 reduction Effects 0.000 claims abstract description 69
- 239000004033 plastic Substances 0.000 claims description 21
- 238000003466 welding Methods 0.000 abstract description 53
- 230000000694 effects Effects 0.000 abstract description 20
- 230000002349 favourable effect Effects 0.000 abstract description 6
- 239000011257 shell material Substances 0.000 description 142
- 230000000670 limiting effect Effects 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000003754 machining Methods 0.000 description 6
- 230000002411 adverse Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a shell assembly, a battery pack and energy storage equipment, wherein the shell assembly comprises a shell and an end cover assembly, the shell is provided with an open end, one end, close to the open end, of the inner surface of the shell is provided with a first thickness reduction zone, and a first step part is formed between the first thickness reduction zone and the inner surface of the shell; the end cover assembly comprises an end cover, a second thickness thinning area is arranged at the circumferential edge of the end cover, a second step part is formed by the second thickness thinning area and the side wall of the end cover, the second step part is arranged in a matched mode with the first step part, the end cover is embedded into the shell through the open end, and the second thickness thinning area is abutted to the first step part in the height direction of the shell. The shell component is more favorable for realizing vertical welding of the shell cover, ensures the assembly effect of the end cover and the shell, and simultaneously does not need to thicken the shell, thereby not only effectively solving the problem that the compressive strength of the shell component is reduced due to the thinning of the shell during vertical welding, but also not negatively affecting the reduction of the energy density of the battery and the cost of structural members.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a shell assembly, a battery pack and energy storage equipment.
Background
At present, secondary batteries are mainly divided into square batteries and cylindrical batteries according to different shapes, and the secondary batteries comprise hard-shell batteries and soft-package batteries from the aspect of shell materials. The hard-shell battery is typically a metal housing, typically comprising a housing having an opening and a top cover for closing the opening, both typically by laser welding during assembly. Taking an aluminum shell as an example, the laser welding of the top cover and the aluminum shell has two schemes, namely side welding and vertical welding, wherein the side welding is implemented in such a way that the top cover is clamped on the aluminum shell, the welding surface is arranged on the top wall of the aluminum shell and welded with the periphery of the lower surface of the top cover, and the vertical welding is implemented in such a way that the top cover is wrapped by the aluminum shell, and the welding surface is arranged on the side wall of the top cover and welded with the inner surface of the shell.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, one object of the present invention is to propose a housing assembly, a battery pack and an energy storage device. The shell component is small in shell thickness, low in production cost and favorable for improving the energy density of the battery, and has good assembly stability.
The present invention is mainly based on the following problems and findings:
In order to ensure the assembly effect of the top cover and the shell, the battery is usually limited by designing steps on the top cover or the shell. For example, a step can be designed on the top cover, the edge of the top cover is directly lapped on the top of the shell and the middle area of the top cover is embedded into the shell during assembly, and the laser direction is generally required to be perpendicular to the opening direction of the shell during the welding of the shell cover when the shell cover is welded, namely a side welding process is adopted; for another example, a step may be formed in the case, and the top cover may be completely inserted into the case during assembly and brought into contact with the step of the case via its lower surface, and the laser direction may be parallel to the case opening direction during case cover welding, that is, vertical welding may be employed. However, in the actual operation process, if side welding is adopted in the welding of the shell cover, the battery or the laser head needs to be rotated, so that the cost is high and the stability is poor; if vertical welding is adopted, steps are required to be designed at the edge of the opening of the shell, the thickness of the shell at the steps is thinner, the compressive strength of the battery shell is reduced, the thickness of the shell is often required to be increased to ensure the compressive strength of the shell, but the thicker shell can reduce the energy density of the battery, and the cost of structural members is increased.
In view of this, in one aspect of the present invention, a housing assembly is provided. According to an embodiment of the invention, the housing assembly comprises:
The shell is provided with an open end, a first thickness reduction zone is arranged at one end, close to the open end, of the inner surface of the shell, and a first step part is formed between the first thickness reduction zone and the inner surface of the shell;
the end cover assembly comprises an end cover, a second thickness thinning area is arranged at the circumferential edge of the end cover, a second step part is formed by the second thickness thinning area and the side wall of the end cover, the second step part is arranged in a matched mode with the first step part, the end cover is embedded into the shell through the open end, and the second thickness thinning area is abutted to the first step part in the height direction of the shell.
According to the shell assembly disclosed by the embodiment of the invention, the first step part is formed by arranging the first thickness reduction zone at one end, close to the open end, of the inner surface of the shell, the second step part is formed by arranging the second thickness reduction zone at the circumferential edge of the end cover, when the end cover and the shell are assembled, the edge of the end cover can be fixed and limited by utilizing the adaptation of the first step part and the second step part, only the (part or all) edge of the end cover is clamped on the inner wall of the shell, and the non-reduction zone of the end cover can extend into the non-reduction zone of the shell, so that the relative fixation of the shell and the end cover can be realized, and the end cover can be embedded into the shell, so that the welding of the shell cover is facilitated by adopting a vertical welding mode during the assembly, the welding stability is facilitated, the welding difficulty and the processing cost are reduced, and the assembly effect of the end cover and the shell is effectively ensured; in addition, the depth of the step part formed on the end cover and the shell is relatively shallow relative to the thickness of the end cover, the step is covered by the molten pool in welding, and the step thinning area on the shell is covered by the molten pool, so that the thickness of the shell thinning area is consistent with that of other parts of the shell, and the compressive strength of the shell assembly thickness thinning area can be ensured without thickening the shell. To sum up, this shell subassembly structure not only is favorable to realizing the standing welding of cap more, guarantees the assembly effect of end cover and casing, still need not simultaneously to thicken the casing to can effectively solve the problem that the compressive strength of shell subassembly descends because of the casing attenuate when standing welding, still can not produce negative effect to battery energy density reduction and structure cost.
In addition, the housing assembly according to the above embodiment of the present invention may have the following additional technical features:
in some embodiments of the invention, the side wall of the end cap is welded to the inner surface of the housing in a sealed connection.
In some embodiments of the present invention, the housing is square, the end cover is square, the inner surfaces of two sides of the housing opposite to each other are respectively provided with the first step portion, and edges of two sides of the end cover opposite to each other are respectively provided with the second step portion adapted to the first step portion.
In some embodiments of the invention, the first step is provided on two short sides of the housing opposite to each other, and the second step is provided on two short sides of the end cap opposite to each other.
In some embodiments of the invention, the four corners of the open end of the housing and the four corners of the end cap are in abutment and interference arrangement with each other.
In some embodiments of the invention, the interference setting has an interference of 0.05mm to 0.15mm.
In some embodiments of the invention, the four corners of the open end of the housing and the four corners of the end cap are rounded.
In some embodiments of the invention, the first step includes a first surface extending in the height direction of the housing and abutting an end wall of the open end of the housing, and a second surface connected to the first surface and extending into the housing; the second step part comprises a third surface and a fourth surface, the third surface extends along the thickness direction of the end cover and is abutted with one surface of the end cover, which is far away from the open end of the shell, and the fourth surface is connected with the third surface and extends towards the middle part of the end cover; wherein the third surface is adapted to the first surface and the fourth surface is adapted to the second surface.
In some embodiments of the present invention, the third surface is disposed parallel to the first surface, and the fourth surface is disposed conformable to the second surface.
In some embodiments of the invention, the first surface is parallel to the height direction of the housing, and the first surface forms an included angle with the second surface of no more than 150 °; alternatively, the third surface is parallel to the thickness direction of the end cover, and an included angle formed by the third surface and the fourth surface is not greater than 150 °.
In some embodiments of the invention, the third surface and the fourth surface form an angle equal to the angle formed by the first surface and the second surface.
In some embodiments of the invention, the first surface forms an angle with the second surface of 60 ° to 120 °, alternatively 85 ° to 95 °, and still alternatively 90 °.
In some embodiments of the invention, the thickness of the second reduced thickness region is less than or equal to the extension distance of the first reduced thickness region in the height direction of the shell < the thickness of the end cover.
In some embodiments of the invention, the second reduced thickness region extends a distance less than or equal to the thickness difference between the housing sidewall and the first reduced thickness region in a direction perpendicular to the thickness of the end cap.
In some embodiments of the invention, the first reduced thickness region extends a distance H in the height direction of the housing 1 The thickness of the end cover is H 2 The thickness of the second thickness-reduced area is H 3 ，H 1 、H 2 、H 3 At least one of the following conditions is satisfied：(i)H 1 And H is 2 The ratio of (2) is not more than 0.5; (ii) H 1 The range of the value of the (B) is 0.2 mm-0.8 mm; (iii) H 3 ＜H 1 ；(iv)H 1 And H is 3 The difference between (a) and (b) is 0.05mm to 0.2mm.
In some embodiments of the invention, the shell has a thickness T 1 The thickness of the first thickness reduction zone is T 2 The thickness difference between the shell and the first thickness reduction zone is T 3 The extension distance of the second thickness reduction zone in the direction perpendicular to the thickness direction of the end cover is T 4 ，T 1 、T 2 、T 3 、T 4 At least one of the following conditions is satisfied: (1) T is more than or equal to 0.15 3 /(T 1 +T 3 )≤0.85；(2)T 1 The value range of (C) is 0.3 mm-1.2 mm, T 2 The value of T is not less than 0.1mm 3 The value range of (2) is 0.1 mm-1 mm; (3) T (T) 4 ＜T 3 ；(4)T 3 And T is 4 The difference between (a) and (b) is 0.05mm to 0.2mm.
In some embodiments of the invention, the end cap assembly further comprises: and the lower plastic is arranged on one side of the end cover, which faces the open end of the shell, and the sum of the thickness of the lower plastic and the thickness of the end cover is not smaller than the difference value between the depth of the shell and the height of the bare cell.
In some embodiments of the present invention, a protrusion is disposed on a side of the lower plastic facing the end cover, a blind hole adapted to the protrusion is disposed on the end cover, and the lower plastic and the end cover are connected to the blind hole through the protrusion.
In yet another aspect of the invention, a battery is provided. According to the embodiment of the invention, the battery comprises the shell assembly and a bare cell, wherein the shell assembly is defined with a containing cavity, and the bare cell is contained in the containing cavity. The battery has all the characteristics and effects of the shell assembly, and is not repeated herein, and in general, compared with the prior art, the battery is simple in assembly process, low in processing cost and good in assembly effect of the end cover and the shell, and the thickness of the shell is not required to be thickened when the end cover and the shell are assembled, so that the energy density and the structural member cost of the battery are not adversely affected.
In some embodiments of the invention, the battery further comprises an insulating film wrapping the bottom and sides of the bare cell and welded to the lower plastic of the housing assembly.
In another aspect of the invention, a battery pack is provided. According to an embodiment of the present invention, the battery pack includes the above-described battery.
In yet another aspect, the present invention provides an energy storage device. According to an embodiment of the invention, the energy storage device comprises the battery pack or the battery.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of the structure of a housing in a housing assembly according to one embodiment of the invention;
FIG. 2 is a schematic illustration of the structure of an end cap in a housing assembly according to one embodiment of the invention;
FIG. 3 is a schematic structural view of a housing assembly according to one embodiment of the invention;
FIG. 4 is a partial structural schematic diagram of a housing assembly according to one embodiment of the invention;
FIG. 5 is a partial schematic structural view of a housing assembly according to yet another embodiment of the present invention;
fig. 6 is a schematic view of a structure of a battery according to an embodiment of the present invention.
Reference numerals illustrate:
10-a housing assembly; 100-a housing; 110-a first thickness reduction zone; 120-a first step; 121-a first surface; 122-a second surface; 130-two short sides of the housing opposite each other; 200-end caps; 210-a second thickness reduction zone; 220-a second step; 221-a third surface; 222-fourth surface; 230-two short sides of the end cap opposite each other; 240-lower plastic; 20-bare cell.
10-a housing assembly; 100-a housing; 110-a first thickness reduction zone; 120-a first step; 121-a first surface; 122-a second surface; 130-two short sides of the housing opposite each other; 200-end caps; 210-a second thickness reduction zone; 220-a second step; 221-a third surface; 222-fourth surface; 230-two short sides of the end cap opposite each other; 240-lower plastic; 20-bare cell.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. In the description of the present invention, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In one aspect of the invention, a housing assembly is provided. As will be appreciated in connection with fig. 1-4, the housing assembly 10, in accordance with an embodiment of the present invention, includes: the shell 100 and the end cover assembly comprise an end cover 200, wherein the shell 100 is provided with an open end, one end, close to the open end, of the inner surface of the shell 100 is provided with a first thickness reduction zone 110, and a first step part 120 is formed between the first thickness reduction zone 110 and the inner surface of the shell 100; the circumferential edge of the end cover 200 is provided with a second thickness reduction region 210, the second thickness reduction region 210 and the side wall of the end cover 200 form a second step portion 220, the second step portion 220 is matched with the first step portion 120, the end cover 200 is embedded into the shell 100 through the open end, and the second thickness reduction region 210 is abutted against the first step portion 120 in the height direction of the shell 100.
According to the shell assembly disclosed by the embodiment of the invention, the first step part is formed by arranging the first thickness reduction zone at one end, close to the open end, of the inner surface of the shell, the second step part is formed by arranging the second thickness reduction zone at the circumferential edge of the end cover, when the end cover and the shell are assembled, the edge of the end cover can be fixed and limited by utilizing the adaptation of the first step part and the second step part, only the (part or all) edge of the end cover is clamped on the inner wall of the shell, and the non-reduction zone of the end cover can extend into the non-reduction zone of the shell, so that the relative fixation of the shell and the end cover can be realized, and the end cover can be embedded into the shell, so that the welding of the shell cover is facilitated by adopting a vertical welding mode during the assembly, the welding stability is facilitated, the welding difficulty and the processing cost are reduced, and the assembly effect of the end cover and the shell is effectively ensured; in addition, the depth of the step part formed on the end cover and the shell is relatively shallow relative to the thickness of the end cover, the step is covered by the molten pool in welding, and the step thinning area on the shell is covered by the molten pool, so that the thickness of the shell thinning area is consistent with that of other parts of the shell, and the compressive strength of the shell assembly thickness thinning area can be ensured without thickening the shell. To sum up, this shell subassembly structure not only is favorable to realizing the standing welding of cap more, guarantees the assembly effect of end cover and casing, still need not simultaneously to thicken the casing to can effectively solve the problem that the compressive strength of shell subassembly descends because of the casing attenuate when standing welding, still can not produce negative effect to battery energy density reduction and structure cost.
According to an embodiment of the present invention, as will be understood from fig. 1 to 4, the size of the arrangement area of the first thickness reduction area 110 and the second thickness reduction area 210 in the circumferential direction of the housing and the end cover is not particularly limited, and a person skilled in the art may flexibly select the arrangement area according to practical situations, so long as it is only required that when the end cover 200 and the housing 100 are assembled, the thickness reduction area of the end cover 200 can abut against the first step 120 in the height direction of the housing 100, so as to implement spacing fixation of the housing 100 and the end cover 200, for example, the first thickness reduction area 110 may be continuously provided in all circumferential areas at one end of the inner surface of the housing 100 near the open end, or may be provided only in a part of the circumferential area at one end of the inner surface of the housing 100 near the open end, or at least two first thickness reduction areas may be provided at intervals in the circumferential area at one end of the inner surface of the housing 100 near the open end; accordingly, the second thickness reduction regions 210 may be continuously provided in all regions of the circumferential edge of the end cap 200, may be provided only in a partial region of the circumferential edge of the end cap 200, or may be provided with at least two first thickness reduction regions at intervals at the circumferential edge of the end cap 200. For example, taking a square shell component as an example, the four edges of the side wall of the square shell, which are close to one end of the open end, can be provided with first thickness reduction areas, and at the moment, the edges of the four edges of the square end cover can be provided with second thickness reduction areas, or the edges of the two opposite edges of the square end cover can be provided with second thickness reduction areas respectively; for another example, the first thickness reduction regions may be disposed on two opposite sides (e.g., short sides) of the side wall of the square housing near the end of the open end, and the second thickness reduction regions may be disposed on two opposite sides of the square end cap adapted to the first thickness reduction regions.
According to an embodiment of the present invention, as will be understood with reference to fig. 1 to 4, the side wall of the end cap 200 and the inner surface of the case 100 may be hermetically coupled by welding, thereby improving the assembly stability of the end cap 200 and the case 100, and improving the sealability of the internal cavity after the assembly of the end cap 200 and the case 100. It should be noted that the welding mode adopted by the invention can be vertical welding, and the welding mode is used for welding the inner surface of the shell and the side wall of the end cover through the vertical welding, so that a battery component or a laser head is not required to be rotated, the processing technology is simple, the welding stability is high, a molten pool formed in the welding process can flow along the thickness direction of the end cover, and the first thickness reduction zone in the shell and the second thickness reduction zone in the end cover are covered in the area extending along the height direction of the shell, so that the thickness reduction zone of the shell and the end cover can be thickened by the molten pool, thereby being beneficial to improving the welding stability and the mechanical strength of the shell component, not increasing the inherent thickness of the shell and/or the end cover, and being beneficial to improving the energy density of the battery and reducing the production cost. It is understood that the height direction of the case and the thickness direction of the end cap are understood to be identical when the case and the end cap are assembled and welded in the present invention.
The specific shape of the housing assembly 10 according to the embodiment of the present invention is not particularly limited, and a person skilled in the art can flexibly select the shape according to actual needs, for example, the housing assembly 10 may be cylindrical or square, and the housing assembly adopting the two structures can be assembled by simultaneously providing thickness reduction areas on the housing and the end plate, which are mutually adapted, combining the step portions with a shallower depth, and by vertically welding the two. As some specific embodiments, taking the square housing assembly 10 as an example, the housing 100 and the end cover 200 of the square housing assembly may be square, the inner surfaces of two opposite sides (such as two opposite short sides or two opposite long sides) of the housing 100 may be respectively provided with a first thickness reduction region to form the first step portion 120, and the edges of two opposite sides (such as two opposite short sides or two opposite long sides) of the end cover 200 may be respectively provided with a second thickness reduction region to form the second step portion 220 adapted to the first step portion 120, thereby not only realizing the limit fixation of the housing and the end cover and improving the stable assembly effect of the housing assembly, but also simplifying the processing technology of the step portion. Preferably, for square housing components, thickness reduction areas can be respectively arranged on two opposite short sides of the housing and the end cover, so that the first step part 120 is arranged on two opposite short sides 130 of the housing 100, and the second step part 220 is arranged on two opposite short sides 230 of the end cover 200, thereby further reducing the processing difficulty of the step part, and simultaneously ensuring the assembly stability of the housing and the end cover and the compressive strength of the housing components after the thickness reduction areas are welded.
According to an embodiment of the present invention, as will be appreciated in conjunction with fig. 3 to 4, the first step 120 may include a first surface 121 and a second surface 122, the first surface 121 extending in the height direction of the housing 100 and abutting an end wall of the open end of the housing 100, the second surface 122 being connected to the first surface 121 and extending into the housing 100; the second step portion 220 may include a third surface 221 and a fourth surface 222, where the third surface 221 extends along the thickness direction of the end cover 200 and abuts against one surface of the end cover 200 away from the open end of the shell 100, the fourth surface 222 is connected with the third surface 221 and extends toward the middle of the end cover 200, where the third surface 221 is adapted to the first surface 121, the fourth surface 222 is adapted to the second surface 122, when the end cover 200 is embedded into the shell 100 for assembly, the third surface 221 is assembled opposite to the first surface 121, the fourth surface 222 is assembled opposite to the second surface 122, the second thickness reduction region on the end cover abuts against the second surface in the height direction of the shell to achieve limit fixation of the shell and the end cover, and when the end cover and the shell are welded together, the first surface and the third surface are welded, by using the feature that the step depth formed by the shell and the thickness reduction region is shallower, the whole step portion formed by welding is covered, so that when the thickness reduction region of the shell and the shell are assembled, the thickness reduction region can be achieved, and the thickness reduction region of the shell can be reduced, and the thickness reduction region can be guaranteed.
According to the embodiment of the invention, as will be understood from fig. 3 to 4, the third surface 221 may be disposed parallel to the first surface 121, and the fourth surface 222 may be disposed in a fitting manner with the second surface 122, so that the limiting fixation of the housing and the end cover is facilitated by means of the stepped portions of the housing and the end cover, the vertical welding connection of the housing and the end cover is more convenient, and the assembly stability of the housing assembly is improved. Further, the first surface 121 may be parallel to the height direction of the housing 100, and an included angle formed by the first surface 121 and the second surface 122 may be not greater than 150 °; or, the third surface 221 may be parallel to the thickness direction of the end cover 200, and the included angle formed by the third surface 221 and the fourth surface 222 may be not greater than 150 °, where the first step portion and the second step portion are adaptively set, and if the included angle formed by the first surface 121 and the second surface 122 is too large, or the included angle formed by the third surface 221 and the fourth surface 222 is too large, the limiting and fixing effect of the shell on the end cover may be affected, and by controlling the urgent angle to be not greater than 150 °, effective limiting and fixing between the shell and the end cover may be ensured, so that the two may be connected by means of vertical welding. Preferably, the included angle formed by the third surface 221 and the fourth surface 222 is equal to the included angle formed by the first surface 121 and the second surface 122, so that effective limiting and fixing between the housing and the end cover can be further ensured, and the assembly stability of the housing and the end cover is improved. Still preferably, the included angle formed by the first surface 121 and the second surface 122 may be 60 ° to 120 °, or may be 85 ° to 95 °, or may be 90 °, which is more beneficial to reducing the processing difficulty of the step portion in the housing and the end cover, and further improving the spacing and fixing effect between the housing and the end cover, so as to be more beneficial to assembling and vertical welding the end cover and the housing, and further improving the structural stability of the housing assembly. It should be noted that, in the actual operation process, in order to meet the requirement of the end cover for entering the shell, the dimension of the non-thinned area of the end cover in the direction perpendicular to the thickness direction of the end cover is not greater than the internal dimension of the non-thinned area of the side wall of the shell, taking a square shell as an example, when the shell is a square shell, the end cover is also square, the length direction and the width direction of the end cover are consistent with the shell and perpendicular to the thickness direction of the end cover, at this time, in the length direction of the shell, the dimension of the non-thinned area of the end cover is not greater (preferably less) than the dimension between the internal surfaces of the side wall of the shell, and in the width direction of the shell, the dimension of the non-thinned area of the end cover is also not greater (preferably less) than the dimension between the internal surfaces of the side wall of the shell.
According to an embodiment of the present invention, it is understood with reference to fig. 5 that the case 100 and the end cap 200 may satisfy the following conditions: the second thickness-reduced region 210 extends a distance T in a direction perpendicular to the thickness direction of the end cap 200 4 Thickness difference T between the side wall of the housing 100 and the first thickness reduction region 110 3 From this, not only can avoid the end cover to embed in the casing because of the excessive interference setting of end cover thickness reduction district in the direction of casing thickness and increase the problem of casing and end cover assembly degree of difficulty, can also reserve the micro-gap of welding operation between casing internal surface and end cover lateral wall to make things convenient for the going on of standing welding and be favorable to making the molten bath cover the step, improve the structural stability after the casing subassembly encapsulation.
According to an embodiment of the present invention, it is understood with reference to fig. 5 that the case 100 and the end cap 200 may satisfy the following conditions: thickness H of second reduced thickness region 210 3 An extension distance H of the first thickness reduction region 110 in the height direction of the housing 100 1 Thickness H of end cap 200 2 Therefore, on one hand, the depth of the step part formed by the shell and the end cover is smaller than the thickness of the end cover, and the problem that a molten pool with larger thickness of the end cover cannot cover the step completely in the welding process can be avoided, and the strength of the shell in the area not covered by the molten pool The problem that the open end of the shell is thinner in the weak area is caused by poor performance, and on the other hand, the problem that the end cover is difficult to be completely embedded into the shell due to machining tolerance, so that the occupied space of a battery or a battery pack is increased, and the energy density of the battery or the battery pack is influenced is solved.
According to an embodiment of the present invention, as understood in conjunction with fig. 3 to 5, the thickness of the case 100 is T 1 The first reduced thickness region 110 has a thickness T 2 The thickness difference between the housing 100 and the first thickness reduction region 110 is T 3 (it is also understood that the second surface 122 extends a distance T in the thickness direction of the housing 100 3 )：T 1 、T 2 、T 3 Can satisfy the following conditions: t is more than or equal to 0.15 3 /(T 1 +T 3 ) Less than or equal to 0.85, e.g. T 3 /(T 1 +T 3 ) May be 0.2, 0.4, 0.6 or 0.8, etc., the inventors found that if T 3 /(T 1 +T 3 ) Too small, the processing difficulty of the step part is increased, and the supporting and limiting effects of the shell on the end cover are easily deteriorated, so that the assembly stability of the shell assembly is affected; and if T 3 /(T 1 +T 3 ) Too large, the processing difficulty is increased, and the strength of the side edge of the shell assembly is easily influenced at the same time, the invention controls T 3 /(T 1 +T 3 ) In the range, the processing technology difficulty of the step part can be improved, and the stability and the compressive strength of the shell assembly can be improved.
Thickness T of housing 100 according to an embodiment of the invention 1 The value of (a) may be in the range of 0.3mm to 1.2mm, for example, 0.5mm, 0.7mm, 0.9mm, 1.1mm, or the like, and the thickness T of the first thickness-reduced region 110 may be 2 The value of (2) may be not less than 0.1mm, for example, may be 0.15mm, 0.25mm, 0.35mm, or the like, and the thickness difference T between the case 100 and the first thickness reduction region 110 may be set to be equal to or greater than 0.35mm 3 The value of (C) may be in the range of 0.1mm to 1mm, for example, 0.3mm, 0.5mm, 0.7mm or 0.9mm, and T is the same as that of T 1 Too large, the energy density of the battery is easily affected, if T 1 Too small, the pressure resistance of the shell is easily affected; if T 2 Oversized or T 3 Too small, the processing difficulty of the step part is increased, and the container is containedThe supporting and limiting effects of the shell 100 on the end cover 200 are easily deteriorated, and the assembly stability of the shell assembly is affected; if T 2 Too small or T 3 If the pressure resistance of the side edge of the shell component is too large, the pressure resistance of the side edge of the shell component is easily influenced, and the invention is realized by controlling T 1 、T 2 、T 3 The value of (2) is in the range, so that the energy density, the shell strength and the packaging effect of the shell component of the battery are more favorable.
As will be appreciated in connection with fig. 3-5, the second reduced thickness region 210 extends a distance T in a direction perpendicular to the thickness of the end cap 200 in accordance with an embodiment of the present invention 4 (it will also be appreciated that the fourth surface 222 extends a distance T perpendicular to the thickness of the body of the end cap 200 4 )，T 4 Can be smaller than the thickness difference T between the housing 100 and the first thickness reduction region 110 3 (it is also understood that the second surface 122 extends a distance T in the thickness direction of the housing 100 3 ) Therefore, after the shell 100 and the end cover 200 are assembled, a gap can be reserved between the inner surface of the shell and the side wall of the end cover (between the first surface 121 and the third surface 221 which are oppositely arranged), so that the end cover 200 is more beneficial to being assembled into the shell, the vertical welding can be conveniently carried out, the molten pool can cover the step, and the structural stability of the shell assembly after being packaged is improved. Further, T 3 And T is 4 The difference of (C) may be 0.05mm to 0.2mm, for example, 0.06mm, 0.08mm, 0.1mm, 0.14mm or 0.18mm, etc., and T is the same as that of the above 3 And T is 4 Too small a difference in the spacing between the inner surface of the housing and the sidewall of the end cap (which is understood to be between the oppositely disposed first surface 121 and third surface 221) may increase the difficulty of assembly of the housing assembly and even make it difficult for the end cap 200 to be inserted into the housing 100; if T 3 And T is 4 The difference of (a) is too large, namely the interval between the inner surface of the shell and the side wall of the end cover is too large, the welding difficulty is increased, the condition of cold joint is easy to generate, the welding strength is reduced, and the sealing effect is poor. The invention is realized by controlling T 3 And T is 4 The difference value of the two is in the range, so that the difficulty of the assembly process is reduced, and the welding stability of the shell assembly is improved.
According to an embodiment of the invention, a knotAs will be understood from fig. 3 to 5, the first reduced thickness region 110 extends a distance H in the height direction of the housing 100 1 (it is understood that the distance of the first surface 121 in the height direction of the housing) is equal to the thickness H of the end cap 200 2 May be no greater than 0.5, for example, may be 0.4, 0.3, 0.2, etc., thereby avoiding the thickness H of the end cap 200 2 Distance H extending from first thickness reduction region 110 in the height direction of case 100 1 Mismatch, which makes it difficult for the end cap 200 to be fully embedded in the housing 100.
According to an embodiment of the present invention, as will be understood with reference to fig. 3 to 5, the first thickness reduction region 110 extends a distance H in the height direction of the housing 100 1 The value of (C) may be in the range of 0.2mm to 0.8mm, for example, 0.3mm, 0.5mm or 0.7mm, and if H 1 Too small, the limiting effect of the shell on the end cover is easy to be poor; if H 1 Too large, the molten pool is difficult to fully cover the stepped region during welding, such as between the first surface 121 and the third surface 221, and between the second surface 122 and the fourth surface 222, is difficult to fully cover the molten pool, and the overall strength of the housing assembly is easily affected, by controlling H 1 The value of (2) is in the range, which is more beneficial to improving the assembly effect and the overall strength of the shell assembly.
As will be appreciated in connection with fig. 4-5, the first reduced thickness region 110 extends a distance H in the height direction of the housing 100 in accordance with an embodiment of the present invention 1 May be greater than the thickness H of the second reduced thickness region 210 3 This can further avoid the problem that the end cap 200 is difficult to be completely inserted into the case 100 due to a machining tolerance, which increases the space occupied by the battery or the battery pack, and affects the energy density of the battery or the battery pack. Further, H 1 And H is 3 The difference of (C) may be 0.05mm to 0.2mm, for example, 0.07mm, 0.09mm, 0.11mm, 0.15mm or 0.17mm, etc., if H 1 And H is 3 The difference value of the two is too small, the requirement on machining tolerance is higher, and the machining difficulty is increased; if H 1 And H is 3 The difference of (2) is too large, the end cap 200 is easily collapsed in the case 100, which is disadvantageous in improving the energy density of the battery, and the present invention is achieved by controlling H 1 And H is 3 The difference value of (2) is within the above range, not only is convenient for processing, but alsoIs not liable to adversely affect the energy density of the battery.
According to the embodiment of the invention, as understood in conjunction with fig. 1 to 3, four corners of the open end of the housing 100 and four corners of the end cover 200 can be abutted against each other and are in interference arrangement, so that the four corners of the housing 100 and the end cover 200 after being assembled can be in interference fit, which is not only beneficial to avoiding affecting the attaching tightness of the housing assembly due to the existence of machining tolerance in the process of machining the housing 100 and/or the end cover 200, but also beneficial to improving the assembly stability of the housing 100 and the end cover 200. According to some specific examples of the present invention, the interference of the interference setting may be 0.05mm to 0.15mm, for example, may be 0.06mm, 0.08mm, 0.1mm, 0.12mm or 0.14mm, etc., and the inventor finds that if the interference of the interference setting is too small, the interaction strength between the housing 100 and the four corners of the end cover 200 is too small, which is not beneficial to further improving the assembly stability of the two; if the interference is too large, the assembly difficulty of the end cover 200 and the shell 100 is increased, the end cover is not easy to be smoothly embedded into the shell, and the use stability of the shell assembly is also easy to be affected.
According to the embodiment of the present invention, as will be understood with reference to fig. 1 to 3, four corners of the open end of the housing 100 and four corners of the end cap 200 may be rounded, so that the difficulty in processing and assembling the housing 100 and the end cap 200 may be further reduced. In some embodiments, the areas of the inner surface of the housing 100 near the four corners of the open end may also be provided with the first thickness-reducing regions 110, the peripheral edges of the four corners of the end cover 200 may be provided with the second thickness-reducing regions 210, and the thickness of the first thickness-reducing regions 110 and the thickness of the second thickness-reducing regions 210 may be respectively and independently increased in the direction from the short side to the long side, that is, the extending distance of the formed step in the thickness direction perpendicular to the short side to the long side is gradually reduced until the step disappears.
According to an embodiment of the present invention, as will be understood with reference to fig. 2, the end cap assembly may further include a lower plastic 240, where the lower plastic 240 may be disposed on a side of the end cap 200 facing the open end of the housing 100, and the sum of the thicknesses of the lower plastic 240 and the end cap 200 may be not less than the difference between the depth of the housing 100 and the height of the bare cell, so that the lower plastic may perform a compaction limiting function on the bare cell, which is beneficial to avoiding shaking of the cell in the housing assembly and improving the stability of the battery in use. Further, a protrusion (not shown in the figure) may be disposed on a side of the lower plastic 240 facing the end cap 200, a blind hole (not shown in the figure) adapted to the protrusion may be disposed on the end cap 200, and the lower plastic 240 and the end cap 200 may be connected with the blind hole through the protrusion, so that the lower plastic may be further limited by the protrusion and the blind hole, and the connection strength and the connection stability between the lower plastic and the end cap may be improved, thereby effectively avoiding the risk of battery leakage.
In yet another aspect of the invention, a battery is provided. As understood in connection with fig. 6, the battery includes the above-described case assembly 10 and the bare cell 20, the case assembly 10 defines a receiving cavity, and the bare cell 20 is received in the receiving cavity according to an embodiment of the present invention. The battery has all the characteristics and effects of the shell assembly, and is not repeated herein, and in general, compared with the prior art, the battery is simple in assembly process, low in processing cost and good in assembly effect of the end cover and the shell, and the thickness of the shell is not required to be thickened when the end cover and the shell are assembled, so that the energy density and the structural member cost of the battery are not adversely affected. In addition, the battery may be a single battery cell or a battery module including a plurality of battery cells.
According to an embodiment of the present invention, as will be understood with reference to fig. 6, the battery may further include an insulation film (not shown) that wraps the bottom and side of the bare cell 20 and is welded with the lower plastic of the case assembly 10, thereby preventing the bare cell 20 from being scratched by the aluminum case during the process of being put into the case, and simultaneously preventing the bare cell 20 from being in direct contact with the case assembly 10, thereby performing an insulation protection function. Further, the insulating film may be a mylar film.
In another aspect of the invention, a battery pack is provided. According to an embodiment of the present invention, the battery pack includes the above-described battery. The battery pack has all the features and effects of the above battery, and will not be described here again.
In yet another aspect, the present invention provides an energy storage device. According to an embodiment of the invention, the energy storage device comprises the battery pack or the battery. Compared with the prior art, the energy storage device has all the characteristics and effects of the battery pack and the battery, and the details are not repeated here. The battery or the battery pack may be used as a power source of the energy storage device or as an energy storage unit of the energy storage device. The energy storage device may include, but is not limited to, mobile devices (e.g., cell phones, notebook computers), electric vehicles (e.g., electric utility vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, watercraft and satellites, energy storage systems.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (18)
1. A housing assembly, comprising:
the shell is provided with an open end, a first thickness reduction zone is arranged at one end, close to the open end, of the inner surface of the shell, and a first step part is formed between the first thickness reduction zone and the inner surface of the shell;
the end cover assembly comprises an end cover, a second thickness thinning area is arranged at the circumferential edge of the end cover, a second step part is formed by the second thickness thinning area and the side wall of the end cover, the second step part is arranged in a matched mode with the first step part, the end cover is embedded into the shell through the open end, and the second thickness thinning area is abutted to the first step part in the height direction of the shell.
2. The housing assembly of claim 1, wherein the side wall of the end cap is welded to the housing inner surface in a sealed connection.
3. The housing assembly according to claim 1 or 2, wherein the housing is square, the end cover is square, the inner surfaces of two side edges of the housing which are oppositely arranged are respectively provided with the first step parts, and the edges of the two side edges of the end cover which are oppositely arranged are respectively provided with the second step parts which are matched with the first step parts; and/or the number of the groups of groups,
the first step part is arranged on two short side edges of the shell, which are oppositely arranged, and the second step part is arranged on two short side edges of the end cover, which are oppositely arranged.
4. A housing assembly according to claim 3, wherein the four corners of the open end of the housing are in abutment with and interference with the four corners of the end cap.
5. The housing assembly of claim 4, wherein the interference setting has an interference of 0.05mm to 0.15mm; and/or the four corners of the open end of the shell and the four corners of the end cover are rounded.
6. The housing assembly of claim 1 or 5, wherein the first step includes a first surface extending in the housing height direction and abutting an end wall of the housing open end, and a second surface connected to the first surface and extending into the housing;
The second step part comprises a third surface and a fourth surface, the third surface extends along the thickness direction of the end cover and is abutted with one surface of the end cover, which is far away from the open end of the shell, and the fourth surface is connected with the third surface and extends towards the middle part of the end cover;
wherein the third surface is adapted to the first surface and the fourth surface is adapted to the second surface.
7. The housing assembly of claim 6, wherein the third surface is disposed parallel to the first surface and the fourth surface is conformable to the second surface.
8. The housing assembly of claim 6, wherein the first surface is parallel to a height direction of the housing and the first surface forms an angle with the second surface of no more than 150 °; alternatively, the third surface is parallel to the thickness direction of the end cover, and an included angle formed by the third surface and the fourth surface is not greater than 150 °.
9. The housing assembly of claim 8, wherein the third surface forms an angle with the fourth surface that is equal to an angle formed by the first surface and the second surface; and/or an included angle formed by the first surface and the second surface is 60-120 degrees, optionally 85-95 degrees, and further optionally 90 degrees.
10. The housing assembly according to claim 1 or 9, wherein the thickness of the second reduced thickness region is less than or equal to the extension distance of the first reduced thickness region in the housing height direction < the thickness of the end cap; and/or the number of the groups of groups,
the extension distance of the second thickness reduction zone in the direction perpendicular to the thickness direction of the end cover is less than or equal to the thickness difference between the side wall of the shell and the first thickness reduction zone.
11. The housing assembly of claim 10 wherein the first reduced thickness region extends a distance H in the height direction of the housing 1 The thickness of the end cover is H 2 The thickness of the second thickness-reduced area is H 3 ，H 1 、H 2 、H 3 At least one of the following conditions is satisfied:
(i)H 1 and H is 2 The ratio of (2) is not more than 0.5;
(ii)H 1 the range of the value of the (B) is 0.2 mm-0.8 mm;
(iii)H 3 ＜H 1 ；
(iv)H 1 and H is 3 The difference between (a) and (b) is 0.05mm to 0.2mm.
12. The housing assembly according to claim 1 or 11, wherein the thickness of the housing is T 1 The thickness of the first thickness reduction zone is T 2 The thickness difference between the shell and the first thickness reduction zone is T 3 The extension distance of the second thickness reduction zone in the direction perpendicular to the thickness direction of the end cover is T 4 ，T 1 、T 2 、T 3 、T 4 At least one of the following conditions is satisfied:
(1)0.15≤T 3 /(T 1 +T 3 )≤0.85；
(2)T 1 The value range of (C) is 0.3 mm-1.2 mm, T 2 The value of T is not less than 0.1mm 3 The value range of (2) is 0.1 mm-1 mm;
(3)T 4 ＜T 3 ；
(4)T 3 and T is 4 The difference between (a) and (b) is 0.05mm to 0.2mm.
13. The housing assembly of claim 1 or 11, wherein the end cap assembly further comprises: and the lower plastic is arranged on one side of the end cover, which faces the open end of the shell, and the sum of the thickness of the lower plastic and the thickness of the end cover is not smaller than the difference value between the depth of the shell and the height of the bare cell.
14. The housing assembly of claim 13, wherein a protrusion is provided on a side of the lower plastic facing the end cap, a blind hole is provided on the end cap and adapted to the protrusion, and the lower plastic and the end cap are connected to the blind hole through the protrusion.
15. A battery, comprising:
the housing assembly of any one of claims 1-14, the housing assembly defining a receiving cavity;
and the bare cell is accommodated in the accommodating cavity.
16. The battery of claim 15, further comprising an insulating film wrapping the bottom and sides of the bare cell and being welded to the lower plastic of the housing assembly.
17. A battery pack comprising the battery of claim 15 or 16.
18. An energy storage device comprising the battery pack of claim 17 or comprising the battery of claim 15 or 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310615927.5A CN116979190A (en) | 2023-05-29 | 2023-05-29 | Housing assembly, battery pack and energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310615927.5A CN116979190A (en) | 2023-05-29 | 2023-05-29 | Housing assembly, battery pack and energy storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116979190A true CN116979190A (en) | 2023-10-31 |
Family
ID=88478545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310615927.5A Pending CN116979190A (en) | 2023-05-29 | 2023-05-29 | Housing assembly, battery pack and energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116979190A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691269A (en) * | 2024-01-31 | 2024-03-12 | 蜂巢能源科技股份有限公司 | Battery core |
-
2023
- 2023-05-29 CN CN202310615927.5A patent/CN116979190A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691269A (en) * | 2024-01-31 | 2024-03-12 | 蜂巢能源科技股份有限公司 | Battery core |
| CN117691269B (en) * | 2024-01-31 | 2024-04-16 | 蜂巢能源科技股份有限公司 | Battery core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214203912U (en) | Battery with a battery cell | |
| JP4210961B1 (en) | Battery with battery case and sealing plate | |
| JP2003142043A5 (en) | ||
| JP2008541373A (en) | Lithium secondary battery with improved tab bondability to polymer film | |
| CN116979190A (en) | Housing assembly, battery pack and energy storage device | |
| CN117374485B (en) | Battery cell shell, battery cell and battery pack | |
| US20220399616A1 (en) | Electrochemical device and electronic device | |
| CN215644674U (en) | Battery case and battery | |
| CN215869509U (en) | Battery and electronic product | |
| US20110045340A1 (en) | Secondary battery | |
| JP4233830B2 (en) | Flat rectangular battery | |
| CN217387313U (en) | Battery case and battery | |
| CN215933703U (en) | Battery with a battery cell | |
| CN115425346B (en) | End cover assembly, battery cell, battery module and electric equipment | |
| CN1249836C (en) | Lithium ion secondary battery | |
| JP2019145294A (en) | Power storage element | |
| CN211907480U (en) | High-strength soft package battery and battery module | |
| CN218242207U (en) | Battery unit | |
| CN217387312U (en) | Battery case and battery | |
| CN216818470U (en) | Battery shell, battery and electronic equipment | |
| JP4284915B2 (en) | Non-aqueous electrolyte battery | |
| CN220138644U (en) | Battery pole, battery top cover and battery core | |
| CN115332690B (en) | Shell, battery and electronic equipment | |
| CN216488271U (en) | Battery case and battery | |
| CN216818479U (en) | Battery shell, battery and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |