Shell, battery cell and battery

Abstract

The invention provides a shell, a battery cell and a battery, the shell comprises a first side plate and a second side plate, the first side plate and the second side plate are adjacently arranged in the circumferential direction of an opening of the shell, and the maximum thickness of the first side plate is smaller than the maximum thickness of the second side plate; the connecting angle plate is used for connecting the first side plate and the second side plate, the connecting angle plate is sequentially provided with a first angle plate section, a second angle plate section and a third angle plate section in the height direction of the shell, and the thickness of the second angle plate section is larger than that of the first angle plate section; the maximum thickness of the third angle plate section is smaller than or equal to the maximum thickness of the second angle plate section. According to the battery cell, the two sections of the angle plate are thickest, so that the two sections of the angle plate can bear the pressure effect of the cover plate assembly on the shell, the deformation or cracking phenomenon caused by the supporting effect on the cover plate assembly is avoided, and the use reliability of the battery cell is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a casing, a battery cell and a battery. Background Art

[0002] The existing battery cell shell is prone to deformation or cracking during use, and the structure of the battery cell shell needs to be improved. Summary of the invention

[0003] In view of this, the present application aims to provide a casing, a battery cell and a battery to solve some or all of the above-mentioned technical problems.

[0004] Based on the above purpose, the present invention provides a housing, wherein the housing has a housing opening along the height direction of the housing, and the housing comprises:

[0005] A first side plate and a second side plate are arranged adjacent to each other along the circumference of the shell opening, and the maximum thickness of the first side plate is smaller than the maximum thickness of the second side plate;

[0006] A connecting angle plate, used to connect the first side plate and the second side plate, wherein the connecting angle plate is provided with angle plate section one, angle plate section two and angle plate section three in sequence in the height direction of the shell, the thickness of the angle plate section two is greater than the thickness of the angle plate section one; the maximum thickness of the angle plate section three is less than or equal to the maximum thickness of the angle plate section two;

[0007] Wherein, the height direction of the shell is the height direction of the shell.

[0008] Further, the thickness of the second section of the corner plate gradually increases in a direction from the side close to the first side plate to the side close to the second side plate; and / or,

[0009] The thickness of the second section of the corner plate gradually increases in a direction from a side close to the shell opening to a side far from the shell opening.

[0010] Furthermore, the difference between the maximum thickness and the minimum thickness of the second section of the angle plate is less than or equal to 0.3 mm.

[0011] Furthermore, in a direction from a side close to the first side plate to a side close to the second side plate, the thickness of the three sections of the angle plate gradually increases.

[0012] Furthermore, the three sections of the angle plate include a first section and a second section connected sequentially in the height direction of the shell, and the first section is arranged close to the shell opening, and the thickening amplitude of the first section is greater than the thickening amplitude of the second section in the direction from the side close to the first side plate to the side close to the second side plate.

[0013] Further, the first section includes a gusset upper section and a gusset transition section connected to each other, and the gusset transition section is located between the gusset upper section and the second section;

[0014] The thickness of the angle plate transition section gradually decreases from the angle plate upper section to the second section.

[0015] Furthermore, the thickness difference between the maximum thickness and the minimum thickness of the upper section of the angle plate is less than or equal to 0.4 mm; the thickness difference between the maximum thickness and the minimum thickness of the second section is less than or equal to 0.3 mm.

[0016] Furthermore, the first side plate is provided with a first plate section and a second plate section connected to each other in the height direction of the shell, the thickness of the first plate section is greater than the thickness of the second plate section, and the first plate section is arranged close to the shell opening.

[0017] Further, the one-plate section comprises a plate upper section and a plate transition section connected to each other, and the plate transition section is connected between the one-plate upper section and the one-plate section two;

[0018] The thickness of the plate transition section gradually decreases from the plate upper section to the plate second section.

[0019] Furthermore, the upper section of the plate is connected to both the first section and the second section of the angle plate; the second section of the plate is connected to the third section of the angle plate, and the thickness of the second section of the plate is less than the maximum thickness of the third section of the angle plate.

[0020] Furthermore, the thickness difference between the upper section of the plate and the second section of the plate is less than or equal to 0.3 mm; the length of the first section of the plate in the height direction of the shell is greater than or equal to 0.5 mm; the length of the transition section of the plate in the height direction of the shell is greater than or equal to 0.3 mm.

[0021] Furthermore, the second side plate is sequentially provided with two plate sections one and two plate sections two in the height direction of the shell, the thickness of the two plate sections one is smaller than the thickness of the two plate sections two, and the two plate sections one is arranged close to the shell opening.

[0022] Furthermore, the second plate section is provided with a first sub-segment and a second sub-segment connected to each other in the height direction of the shell, the first sub-segment is arranged close to the shell opening, the thickness of the first sub-segment is greater than the thickness of the second sub-segment, the first sub-segment is connected to the angle plate section two and a part of the angle plate section three, and the second sub-segment is connected to another part of the angle plate section three.

[0023] Further, the first subsection includes a second plate upper section and a second plate transition section;

[0024] The thickness of the second-plate transition section gradually decreases from the second-plate upper section to the second subsection.

[0025] Furthermore, the first section of the second plate is connected to the first section of the angle plate, and the second section of the second plate is connected to the second section of the angle plate and the third section of the angle plate; the thickness of the second section of the second plate is greater than or equal to the maximum thickness of the third section of the angle plate, and less than or equal to the maximum thickness of the second section of the angle plate.

[0026] Furthermore, the thickness difference between the second plate upper segment and the second sub-segment is less than or equal to 0.3 mm; and the length of the second plate transition segment in the height direction of the shell is greater than or equal to 0.3 mm.

[0027] Furthermore, the area of ​​the first side plate is greater than the area of ​​the second side plate.

[0028] Based on the same inventive concept, the present application also provides a battery cell, including:

[0029] A housing as described above;

[0030] A cover plate assembly, covering the opening of the shell and forming a receiving space with the shell;

[0031] A bare battery cell is located in the accommodation space;

[0032] The second section of the angle plate is located above the bare battery cell, away from the edge of the shell opening, and at least part of the third section of the angle plate is arranged opposite to the bare battery cell.

[0033] Furthermore, the cover assembly includes a cover body and an insulating member connected to a side of the cover body close to the accommodating space;

[0034] In the height direction of the shell, the distance from the edge of the second plate section close to the first plate section to the shell opening is a first distance, and the distance from the surface of the insulating member away from the cover body to the shell opening is a second distance, and the first distance is greater than the second distance.

[0035] Based on the same inventive concept, the present application also provides a battery, comprising the battery cell as described in any of the above items.

[0036] From the above description, it can be seen that the shell, battery cell and battery provided by the present application, wherein the shell arranges the connecting angle plates as angle plate section one, angle plate section two and angle plate section three which are connected in sequence. Since angle plate section one is used to connect with the cover plate assembly, angle plate section two is the area adjacent to angle plate section one, and the pressure exerted on the shell by the gravity of the cover plate assembly is mainly concentrated on angle plate section two. Therefore, the thickness of angle plate section two is arranged to be greater than that of angle plate section one, and greater than or equal to that of angle plate section three, that is, angle plate section two is arranged to be the thickest, so that angle plate section two is sufficient to bear the pressure of the cover plate assembly on the shell, and will not deform or crack due to the support provided to the cover plate assembly, thereby improving the reliability of the battery cell.

[0037] In addition, the thickness of the third section of the angle plate is set to be less than or equal to the thickness of the second section of the angle plate, so that the distance between the third section of the angle plate and the bare battery cell is greater than or equal to the distance between the second section of the angle plate and the bare battery cell. As a result, the risk of deformation or cracking of the connecting angle plate caused by factors such as the expansion stress of the bare battery cell will be reduced. Correspondingly, the problem of squeezing damage to the expanded bare battery cell by the third section of the angle plate can also be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic top view of a battery according to an embodiment of the present application;

[0040] Figure 2 for Figure 1 Schematic diagram of the cutaway of section AA;

[0041] Figure 3 for Figure 1 A magnified view of part A Figure 1 ;

[0042] Figure 4 This is a schematic diagram of a top view of a housing in an embodiment of the present application;

[0043] Figure 5 Figure 4 Schematic diagram of the cutaway of the middle BB section;

[0044] Figure 6 for Figure 5 A magnified schematic diagram of part B;

[0045] Figure 7 This is a three-dimensional schematic diagram of the housing in the embodiment of the present application. Figure 1 ;

[0046] Figure 8 for Figure 7 A magnified schematic diagram of part C;

[0047] Fig. 9 This is a three-dimensional schematic diagram of the housing in the embodiment of the present application. Figure 2 ;

[0048] Fig.10 for Fig. 9 The enlarged schematic diagram of the D part;

[0049] Description of reference numerals:

[0050] 100. Shell;

[0051] 110, first side plate; 111, one plate, one section; 111a, one plate, upper section; 111b, one plate, transition section; 112, one plate, two sections;

[0052] 120, second side plate; 121, second plate section 1; 122, second plate section 2; 122a, first subsection; 122a', second plate upper section; 122a", second plate transition section; 122b, second subsection; 122c, second plate transition section; 123, second plate shoulder;

[0053] 130, connecting angle plate; 131, angle plate section 1; 132, angle plate section 2; 133, angle plate section 3; 133a', angle plate upper section; 133a", angle plate transition section; 133b, section 2; 134, angle plate shoulder;

[0054] 140, bottom plate;

[0055] 200, cover plate assembly;

[0056] 210, cover body;

[0057] 220, insulation parts;

[0058] 230, pole;

[0059] 300, Accommodation space;

[0060] 400. Bare battery cells. DETAILED DESCRIPTION

[0061] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0062] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0063] The battery cell in the related technology, such as Figure 1 , Figure 2 As shown, it includes: a housing 100, a cover assembly 200 and a bare battery cell 400, wherein the housing 100 has a housing opening 140 along the height direction of the housing 100, and the height direction of the housing is Figure 2 In the Z direction, the cover assembly 200 covers the shell opening 140 and forms a receiving space 300 with the shell 100; the bare cell 400 is located in the receiving space 300. The cover assembly 200 includes a cover body 210 and an insulating member 220 connected to the cover body 210 and close to the receiving space 300. In addition, for the convenience of subsequent description, the side of the shell 100 close to the bare cell 400 is defined as the inner side, and the side of the shell 100 away from the bare cell 400 is defined as the outer side.

[0064] The shell 100 of the battery cell must bear the gravity of the cover assembly 200 during use. Specifically, because the cover body 210 of the cover assembly 200 is usually welded to the shell opening 140, its weight will produce downward pressure on the shell 100. This pressure is mainly concentrated in the area of ​​the shell 100 opposite to the cover assembly 200, that is, the top area of ​​the shell 100. The long-term effect of this pressure may cause deformation or cracking of the top area of ​​the shell 100.

[0065] In addition, the shell 100 of the battery cell has to withstand the expansion of the bare battery cell 400. Specifically, during the charge and discharge process of the battery cell, a chemical reaction will occur inside the battery cell, causing the bare battery cell 400 to expand in volume. This expansion stress mainly acts on the area of ​​the shell 100 opposite to the bare battery cell 400, that is, the area below the top area of ​​the shell 100. This expansion stress will cause the shell 100 to be pushed outward. If the strength of the shell 100 is not enough to resist this expansion stress, it is easy to deform or crack, thereby affecting the normal operation of the battery cell.

[0066] Based on the above description, during the use of the battery cell, the shell 100 is prone to deformation or cracking. The applicant has found that it is necessary to improve the structure of the connecting angle plate 130 and / or the side plate constituting the shell 100 to solve the above problems.

[0067] The technical solution of this case is described in detail below in conjunction with specific embodiments and drawings.

[0068] In some embodiments, Figure 7-10 As shown, the housing 100 has a housing opening 140 along the height direction of the housing, and the housing 100 includes:

[0069] The first side plate 110 and the second side plate 120 are arranged adjacent to each other in the circumferential direction of the housing opening 140 , and the maximum thickness of the first side plate 110 is smaller than the maximum thickness of the second side plate 120 ;

[0070] A connecting angle plate 130 is used to connect the first side plate 110 and the second side plate 120. The connecting angle plate 130 is provided with an angle plate section 131, an angle plate section 2 132 and an angle plate section 3 133 in sequence in the height direction of the shell. The thickness of the angle plate section 2 132 is greater than the thickness of the angle plate section 131. The maximum thickness of the angle plate section 3 133 is less than or equal to the maximum thickness of the angle plate section 2 132.

[0071] The height direction of the shell is the height direction of the shell 100 .

[0072] The outer contour of the housing 100 has various forms. Optionally, the housing 100 may be a cylindrical structure or a rectangular structure, etc. Correspondingly, the housing opening 140 may be circular or rectangular. The embodiments of the present application are all illustrated by taking the housing as a rectangular structure and the housing opening 140 as a rectangle, that is, one housing 100 may include two first side panels 110 disposed opposite to each other, and two other second side panels 120 disposed opposite to each other. The adjacent first side panels 110 and the second side panels 120 are connected by a connecting angle panel 130, that is, one housing 100 may also include four connecting angle panels 130. The connection between the first side panel 110, the second side panel 120 and the connecting angle panel 130 may be one of splicing, welding or integral connection.

[0073] Among them, the area of ​​the first side plate 110 is larger than that of the second side plate 120, that is, the first side plate 110 is the large side and the second side plate 120 is the small side, that is, the area of ​​the first side plate 110 relative to the second side plate 120 and the cover plate assembly 200 and the bare battery cell 400 will be larger.

[0074] In the present embodiment, the maximum thickness of the first side panel 110 is set to be smaller than the maximum thickness of the second side panel 120, that is, the distance between the first side panel 110 and the bare battery cell 400 is larger than the distance between the second side panel 120 and the bare battery cell 400. Thus, the risk of deformation or cracking of the first side panel 120 due to factors such as the expansion stress of the bare battery cell 400 is reduced. Correspondingly, the problem of squeezing damage of the expanded bare battery cell 400 by the first side panel 110 can also be avoided. The first side panel 120 is a main side panel with a larger area of ​​the shell 100, which improves the reliability of the entire shell 100.

[0075] Among them, the average thickness of the first side plate 110 is less than the average thickness of the second side plate 120, and the area of ​​the first side plate 110 is larger than the area of ​​the second side plate 120, thereby effectively reducing the weight of the shell to meet the demand for lightweight shell.

[0076] In addition, if Figure 8 , Fig. 9 As shown, in the height direction of the shell, the first section 131 of the gusset corresponds to the area within the four points ABCD, the second section 132 of the gusset corresponds to the area within the four points CDEF, and the third section 133 of the gusset corresponds to the area within the four points EFMN.

[0077] Among them, the first section 131 of the angle plate corresponds to the welding area between the cover plate body 210 and the connecting angle plate 130, the second section 132 of the angle plate is the area mainly opposite to the cover plate assembly 200, and the third section 133 of the angle plate is the area mainly opposite to the bare battery cell 400.

[0078] In the present embodiment, the connecting angle plate 130 is configured to be angle plate section 131, angle plate section 2 132 and angle plate section 3 133 which are connected in sequence. Since angle plate section 131 is used to connect with the cover plate assembly 200, and angle plate section 2 132 is an area adjacent to angle plate section 131, the pressure exerted on the shell 100 by the gravity of the cover plate assembly 200 is mainly concentrated in angle plate section 132. Therefore, the thickness of angle plate section 2 132 is set to be greater than angle plate section 131, and greater than or equal to angle plate section 3 133, that is, angle plate section 2 132 is set to be the thickest, so that angle plate section 2 132 is sufficient to bear the pressure of the cover plate assembly 200 on the shell 100, and will not be deformed or cracked due to the support provided to the cover plate assembly 200, thereby improving the reliability of the battery cell.

[0079] In addition, the thickness of the third section of the angle plate 133 is set to be less than or equal to the thickness of the second section of the angle plate 132, so that the distance between the third section of the angle plate 133 and the bare battery cell 400 is greater than or equal to the distance between the second section of the angle plate 132 and the bare battery cell 400. As a result, the risk of deformation or cracking of the connecting angle plate caused by factors such as the expansion stress of the bare battery cell 400 is reduced. Correspondingly, the problem of squeezing damage to the expanded bare battery cell 400 by the third section of the angle plate 133 can also be effectively avoided.

[0080] In some embodiments, Figure 8 As shown, the thickness of the second corner plate section 132 gradually increases in a direction from the side close to the first side plate 110 to the side close to the second side plate 120; and / or,

[0081] The thickness of the second corner plate section 132 gradually increases in a direction from a side close to the housing opening 140 to a side away from the housing opening 140 .

[0082] The difference between the maximum thickness and the minimum thickness of the second corner plate section 132 is less than or equal to 0.3 mm.

[0083] The direction from the side close to the first side plate 110 to the side close to the second side plate 120 is Figure 8 The X direction in the figure can also be referred to as the horizontal direction of the connecting angle plate 130; the direction from the side close to the shell opening 140 to the side away from the shell opening 140 is Figure 8 The direction opposite to the Z direction may also be referred to as the vertical direction of the connecting angle plate 130. That is, the second angle plate section 132 in this embodiment may gradually become thicker in the horizontal direction, may gradually become thicker in the vertical direction, or may gradually become thicker in both the horizontal and vertical directions (that is, the second angle plate section 132 gradually becomes thicker in its diagonal direction).

[0084] Taking the example that the second corner plate section 132 gradually becomes thicker in the diagonal direction, when the outer side surfaces of the second corner plate section 132 and the first corner plate section 131 are flat, since the thickness of the second corner plate section 132 is greater than that of the first corner plate section 131, and the second corner plate section 132 gradually becomes thicker in the diagonal direction, the following will be formed: Figure 8 The angle plate shoulder 134 shown can support the cover plate body 210, that is, the cover plate body 210 not only bears the welding and fixing function of the angle plate section 131 at the shell opening 140, but also bears the supporting function of the angle plate shoulder 134, thereby improving the connection stability of the cover plate assembly 200 on the connecting angle plate 130.

[0085] In addition, compared with the case where the second section 132 of the gusset gradually thickens in the diagonal direction, the second section 132 of the gusset gradually thickens in the horizontal direction, so that the thickness of the side where the second section 132 of the gusset connects with the first side panel 110 is thinner and weaker, and then the side where the second section 132 of the gusset close to the first side panel 110 is easily deformed and cracked; the second section 132 of the gusset gradually thickens in the vertical direction, so that the thickness of the side where the second section 132 of the gusset connects with the first section 131 is thinner and weaker, and then the side where the second section 132 of the gusset close to the first section 131 is easily deformed and cracked. The second section 132 of the gusset gradually thickens in the diagonal direction, which can solve the above problems, that is, it can make up for the problem that the second section 132 of the gusset is weaker on the side close to the first side panel 110, and it can also make up for the problem that the second section 132 of the gusset is weaker on the side close to the first section 131, thereby improving the overall strength of the connected gusset 130.

[0086] In this embodiment, three forms of thickening of the second corner panel section 132 in the horizontal direction, the vertical square direction and the diagonal direction are further described. Among them, the form of gradually thickening in the diagonal direction can simultaneously improve the strength of the side where the second corner panel section 132 is connected to the first side panel 110 and the side where it is connected to the first corner panel section 131, so that the corner panel shoulder 134 formed by the second corner panel section 132 and the first corner panel section 131 can effectively bear the gravity of the cover plate assembly 200, so as to avoid deformation and cracking of the connecting corner panel 130 at the second corner panel section 132.

[0087] In some embodiments, Figure 8 , Fig.10 As shown, the thickness of the three corner plate sections 133 gradually increases in a direction from the side close to the first side plate 110 to the side close to the second side plate 120 .

[0088] like Fig.10 As shown, the three sections of the angle plate are the areas within the four points of EFMN, and are also the main area of ​​the connecting angle plate 133. Since the connecting angle plate 133 connects the first side plate 110 and the second side plate 120, and as mentioned above, the maximum thickness of the first side plate 110 is less than the maximum thickness of the second side plate 120, that is, there is a wall thickness difference between the first side plate 110 and the second side plate 120, and the first side plate 110 is thinner than the second side plate 120 as a whole, the connecting angle plate 130 plays the role of uniform transition from the first side plate 110 to the second side plate 120, therefore, the three sections of the angle plate 130 gradually become thicker in the X direction, so as to realize the connecting transition function of the connecting angle plate 130 to the first side plate 110 and the second side plate 120.

[0089] In some embodiments, Fig.10As shown, the three sections of the angle plate 133 include a first section 133a and a second section 133b connected in sequence in the height direction Z of the shell. The first section 133a is arranged close to the shell opening 140, and points in a direction from a side close to the first side plate 110 to a side close to the second side plate 120. The thickening amplitude of the first section 133a is greater than the thickening amplitude of the second section 133b.

[0090] like Fig.10 As shown, the first section is the corresponding area within the four points EFJK, and the second section is the corresponding area within the four points JKMN. The second side panel 120 is weight-reduced, and the thickness of the area corresponding to the first section 133a is greater than the thickness of the area corresponding to the second section 133b. Therefore, the thickness of the first section 133a and the second section 133b on the side connected to the first side panel 110 is the same, and the thickness on the side connected to the second side panel 120 is different, and the thickness of the area corresponding to the second side panel 120 connected to the first section 133a will be greater. Therefore, the thickening amplitude of the first section 133a needs to be greater than the thickening amplitude of the second section 133b.

[0091] The thickening amplitude may specifically be the thickness variation within a unit length, reflecting the degree of variation of the first section 133a and the second section 133b in the thickness direction. For example, the unit length may be 0.1 mm, 0.5 mm, 1 mm, etc. The thickening amplitude of the first section 133a is greater than the thickening amplitude of the second section 133b, which means that in the direction from the side close to the first side panel 110 to the side close to the second side panel 120, the thickening amplitude of the first section 133a within each unit length is greater than the thickness variation of the second section 133b within the corresponding unit length, that is, within the corresponding unit length, the thickness of the first section 133a is greater than the thickness of the second section 133b. The first section 133a is arranged close to the second section 132 of the angle plate. If the second section 132 of the angle plate directly supports the cover plate assembly, then the first section 133a indirectly supports the cover plate assembly 200. The setting of the thickening range of the first section 133a being greater than the thickening range of the second section 133b helps to compensate for the problem of weaker strength of the first section 133a on the side close to the first side plate 110, thereby improving the overall strength of the connecting angle plate 130.

[0092] In some embodiments, Fig.10 As shown, the first section 133a includes a connected angle plate upper section 133a' and an angle plate transition section 133a", and the angle plate transition section 133a" is located between the angle plate upper section 133a' and the second section 133b; the thickness of the angle plate transition section 133a" gradually decreases from the angle plate upper section 133a' to the second section 133b.

[0093] The thickness difference between the maximum thickness and the minimum thickness of the upper section 133a' of the angle plate is the first thickness difference x1; the thickness difference between the maximum thickness and the minimum thickness of the second section 133b is the second thickness difference x2, x2<x1, exemplarily, x1 is less than or equal to 0.4mm, specifically, 0.4mm, 0.35mm, 0.3mm, 0.25mm, 0.2mm, 0.15mm, 0.1mm; x2 is less than or equal to 0.3mm, specifically, 0.3mm, 0.25mm, 0.2mm, 0.15mm, 0.1mm, 0.05mm. Whether it is the upper section 133a' of the angle plate or the second section 133b, the thickness difference between the maximum thickness and the minimum thickness is mainly determined by the thickness of the first side panel 110 and the second side panel 120 connected thereto. exemplarily, the minimum thickness is the thickness of the area connected to the first side panel 110, and the maximum thickness is the thickness of the area connected to the second side panel 120. To ensure the stability of the entire shell 100, under normal circumstances, the thickness difference between the first side panel 110 and the second side panel 120 at the same horizontal height should not be greater than 0.4 mm. Therefore, the thickness difference between the maximum thickness and the minimum thickness of the upper section 133a' of the angle plate is less than or equal to 0.4 mm; because the area of ​​the second side panel 120 connected to the second section 133b is thinner than the area of ​​the second side panel 120 connected to the first section 133a, the thickness difference of the second section 133b is smaller than the thickness difference of the upper section 133a' of the angle plate. Therefore, the thickness difference between the maximum thickness and the minimum thickness of the second section 133b is set to be less than or equal to 0.3 mm.

[0094] The inner side surface of the angle plate transition section 133a" is a slope connecting the inner side surface of the angle plate upper section 133a' and the inner side surface of the second section 12, wherein the inner side surface is the side surface of the shell 100 close to the bare battery cell 400.

[0095] In this embodiment, the first section 133a is divided into an angle plate upper section 133a' and an angle plate transition section 133a", that is, an angle plate transition section 133a' is arranged between the angle plate upper section 133a' and the second section 133b, and the angle plate transition section 133a' realizes the thickness transition between the angle plate upper section 133a' and the second section 133b. The angle plate transition section 133a' strengthens the connection strength between the angle plate upper section 133a' and the second section 133b, avoids the influence of the sudden change in thickness between the angle plate upper section 133a' and the second section 12 of the shell 100 on the mechanical strength of the shell 100, and improves the safety of the battery cell.

[0096] In some embodiments, Figure 2 , Figure 3As shown, the first side plate 110 is provided with a first plate section 111 and a second plate section 112 connected to each other in the height direction of the shell, the thickness of the first plate section 111 is greater than the thickness of the second plate section 112, and the first plate section 111 is arranged close to the shell opening 140.

[0097] Among them, the first section of the plate 111 is mainly arranged opposite to the cover plate assembly 200, the second section of the plate 112 is mainly arranged opposite to the bare battery cell 400, and the top of the first section of the plate 111 can be welded and positioned with the cover plate body 210.

[0098] The first side plate 110 in this embodiment includes a plate section 111 and a plate section 112 connected up and down. Since the plate section 111 needs to be welded to the cover body 210, the thickness of the plate section 111 is set to be thicker to avoid the plate section 111 being too thin and having wavy edges during processing, which affects the matching and welding between the shell 100 and the cover body 210, that is, the connection strength between the first side plate 110 and the cover body 210 is guaranteed. The plate section 112 is thinned relative to the plate section 111. The thinning design increases the distance between the bare cell 400 and the first side plate 110, avoids the shell 100 from squeezing the bare cell 400, and meets the demand for lightweight shell 100.

[0099] In some embodiments, Figure 2 , Figure 3 As shown, the plate section 111 includes a plate upper section 111a and a plate transition section 111b connected to each other, and the plate transition section 111b is connected between the plate upper section 111a and the plate second section 112; the thickness of the plate transition section 111b gradually decreases from the plate upper section 111a to the plate second section 112.

[0100] Among them, the inner side surface of the plate transition section 111b is a slope connecting the inner side surface of the plate section 111 and the inner side surface of the plate transition section 111b, wherein the inner side surface is the side surface of the shell 100 close to the bare battery cell 400.

[0101] Among them, Figure 3As shown, the thickness of the upper section 111a of the plate is d1, and the thickness of the second section 112 of the plate is d2. In order to take into account the strength requirements and lightweight requirements of the first side plate 110, exemplarily, the difference between d1 and d2 is less than or equal to 0.3mm, and greater than or equal to 0.05mm, specifically can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm; in addition, because the first section 111 of the plate needs to be welded and fixed to the cover plate body 210, that is, the first section 111 of the plate will directly bear the gravity of the cover plate assembly 200, therefore, the length L3 of the first section 111 of the plate in the height direction of the shell must be long enough, but too long will also make it difficult to meet the lightweight requirement of the first side plate 110. Therefore, it is necessary to set a suitable length range for the first section 111 of the plate, exemplarily, 0.5mm≤L3 ≤1.0mm, specifically it can be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1.0mm; in addition, the length L4 of the plate transition section 111b should not be too long or too short. If it is too long, the size of the plate second section 112 will be reduced, making it difficult to meet the lightweight requirement of the first side plate 110. If it is too short, it is easy to form a convex edge on the outer side surface of the shell 100, affecting the flatness of the outer side surface of the shell 100. Therefore, it is necessary to set a suitable length range for the plate transition section 111b. For example, 0.3mm≤L4≤1.0mm, specifically it can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm.

[0102] In the present embodiment, the first plate section 111 is divided into a plate upper section 111a and a plate transition section 111b, that is, a plate transition section 111b is arranged between the plate upper section 111a and the plate second section 112, and the plate transition section 111b realizes the thickness transition between the plate upper section 111a and the plate second section 112, and the plate transition section 111b strengthens the connection strength between the plate upper section 111a and the plate second section 112, thereby avoiding the influence of the sudden thickness change between the plate upper section 111a and the plate second section 112 of the shell 100 on the mechanical strength of the shell 100, thereby improving the safety of the battery cell.

[0103] In some embodiments, Figure 7 As shown, the first plate section 111 is connected to the first angle plate section 131 and the second angle plate section 132 ; the second plate section 112 is connected to the third angle plate section 133 , and the thickness of the second plate section 112 is less than the maximum thickness of the third angle plate section 133 .

[0104] Exemplarily, the height of the first plate segment 111 is equal to the sum of the first angle plate segment 131 and the second angle plate segment 132 , and the second plate segment 112 and the third angle plate segment 133 are of the same height.

[0105] Among them, the maximum thickness of the three sections of the angle plate is the thickness of the side where the three sections of the angle plate are connected to the second side plate 120, the thickness of the two sections of the first plate 112 is the thickness of the side where the three sections of the angle plate 133 are connected to the two sections of the first plate 112, and the thickness of the two sections of the first plate 112 is less than the maximum thickness of the three sections of the angle plate 133, which means that at the same horizontal height, the thickness of the two sections of the first plate 112 is less than the thickness of the second side plate 120 in the corresponding area, which meets the lightweight requirements of the shell 100 without affecting the supporting effect of the shell 100 on the cover plate assembly 200.

[0106] In some embodiments, the second side plate 120 is sequentially provided with a first plate section 121 and a second plate section 122 in the height direction of the shell, the thickness of the first plate section 121 is smaller than the thickness of the second plate section 122, and the first plate section 121 is arranged close to the shell opening 140.

[0107] The second plate section 121 is welded and positioned with the cover body 210 , and the second plate section 122 is mainly arranged opposite to the cover assembly 200 and the bare battery cell 400 except the cover body 210 .

[0108] Among them, the thickness of the second plate section 121 is less than the thickness of the second plate section 122, but because it is also welded and fixed to the cover body 210, its thickness can be the same as the thickness of the first plate section 111, so as to avoid the second plate section 121 being too thin and having wavy edges during processing, affecting the matching and welding between the housing 100 and the cover body 210, that is, ensuring the connection strength between the second side plate 120 and the cover body 210. Exemplarily, the thickness of the second plate section 121 and the first plate section 111 are both 0.8 mm, and the thickness of the second plate section 111 is 1.0 mm.

[0109] The second side plate 120 in the present embodiment includes a first plate section 121 and a second plate section 122 which are connected up and down, and the thickness of the first plate section 121 is smaller than the thickness of the second plate section 122, that is, when the outer side surfaces of the first plate section 121 and the second plate section 122 are in the same plane, a second plate shoulder 123 will be formed between the first plate section 121 and the second plate section 122, and the second plate shoulder 123 and the angle plate shoulder 134 are in the same plane, and can jointly support the cover plate body 210 to ensure the connection stability of the cover plate assembly 200 relative to the shell 100.

[0110] In some embodiments, Figure 4-Figure 6As shown, the second plate section 122 is provided with a first sub-segment 122a and a second sub-segment 122b connected in the height direction of the shell, the first sub-segment 122a is arranged close to the shell opening 140, the thickness of the first sub-segment 122a is greater than the thickness of the second sub-segment 122b, the first sub-segment 122a is connected to the second angle plate section 132 and a part of the third angle plate section 133, and the second sub-segment 122b is connected to another part of the third angle plate section 133.

[0111] The first sub-segment 122a is connected to the first segment 133a of the second corner plate segment 132 and the third corner plate segment 133, and the second sub-segment 122b is connected to the second segment 133b of the third corner plate segment 133. Since the first sub-segment 122a is the area on the second side plate 120 that directly supports the cover plate assembly 200, that is, the first sub-segment 122a needs to be high enough and thick enough, but if it is too high or too thick, it is difficult to meet the lightweight requirement of the second side plate 120. Therefore, it is necessary to The sub-segment 122b is set with a suitable height and thickness. Exemplarily, the height of the first sub-segment 122a is 5 times to 15 times the height of the second plate section 121, and the height of the second sub-segment 122a is 3 times to 15 times the height of the first sub-segment. Exemplarily, the thickness of the first sub-segment 122a is 1.0 mm, and the thickness of the second sub-segment 122b is 0.8 mm. The height of the first sub-segment 122a is 10 times the height of the second plate section 121, and the height of the second sub-segment 122b is 10 times the height of the first sub-segment 122a.

[0112] The two-plate-two-section 122 in this embodiment includes a first sub-section 122a and a second sub-section 122b connected vertically. That is, the second sub-section 122b is designed to be thinner than the first sub-section 122a to meet the lightweight requirement of the shell 100.

[0113] In some embodiments, Figure 6 As shown, the first sub-segment 122a includes a second plate upper segment 122a' and a second plate transition segment 122a"; the thickness of the second plate transition segment 122a" gradually decreases from the second plate upper segment 122a' to the second sub-segment 122b.

[0114] The inner side surface of the second plate transition section 122a" is a slope connecting the inner side surface of the second plate upper section 122a' and the inner side surface of the second sub-section 122b, wherein the inner side surface is the side surface of the shell 100 close to the bare battery cell 400.

[0115] Among them, the second plate transition section 122a" can be connected to the corner plate transition section 133a".

[0116] The thickness difference between the second plate upper section 122a' and the second sub-section 122b is x3. In order to take into account the strength and lightweight requirements of the second side plate 120, x3 is less than or equal to 0.3mm and greater than or equal to 0.05mm, and can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm. In addition, the length of the second plate transition section 122b in the height direction of the shell should not be too long or too short. If it is too long, it will reduce the strength of the second sub-section 122 The size of b makes it difficult to meet the lightweight requirement of the second side plate 120. If it is too short, it is easy to form a convex edge on the outer side surface of the shell 100, affecting the flatness of the outer side surface of the shell 100. Therefore, it is necessary to set a suitable length range for the first plate transition section 111b. Exemplarily, the length range of the second plate transition section 122a" is 0.3mm-1.0mm, specifically 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1.0mm.

[0117] In this embodiment, the first sub-segment 122a is divided into a second plate upper segment 122a' and a second plate transition segment 122a", that is, a second plate transition segment 122a" is set between the second plate upper segment 122a' and the second sub-segment 122b, and the second plate transition segment 122a" realizes the thickness transition between the second plate upper segment 122a' and the second plate transition segment 122a", and the second plate transition segment 122a" strengthens the connection strength between the second plate upper segment 122a' and the second sub-segment 122b, avoids the influence of the sudden change in thickness of the second plate upper segment 122a' and the second sub-segment 122b of the shell 100 on the mechanical strength of the shell 100, and improves the safety of battery cell use.

[0118] In some embodiments, Figure 7 , Figure 8 As shown, the second plate section 121 is connected to the angle plate section 131, and the second plate section 122 is connected to the angle plate section 2 132 and the angle plate section 3 133; the thickness of the second plate section 122 is greater than or equal to the maximum thickness of the angle plate section 3 133, and less than or equal to the maximum thickness of the angle plate section 2 132.

[0119] Exemplarily, the second plate section 121 and the angle plate section 131 have the same height, and the second plate section 122 has a height equal to the sum of the angle plate section 132 and the angle plate section 3 133 .

[0120] The maximum thickness of the corner plate section 3 133 is the thickness of the side where the corner plate section 3 133 is connected to the second plate section 2 122, and the maximum thickness of the corner plate section 2 132 is the thickness of at least a portion of the side where the corner plate section 2 132 is connected to the second plate section 2 122.

[0121] Among them, because the thickness of the second section 132 of the corner plate is greater than or equal to the thickness of the third section 133 of the corner plate, and the second section 122 of the second plate is connected to both the second section 132 of the corner plate and the third section 133 of the corner plate, the thickness of the second section 122 of the second plate is greater than or equal to the maximum thickness of the third section 133 of the corner plate, and less than or equal to the maximum thickness of the second section 132 of the corner plate, so as to ensure a smooth transition between the second section 122 of the second plate and the connecting corner plate 130, thereby improving the stability of the shell 100.

[0122] Based on the same inventive concept, Figure 1 , Figure 2 , Figure 3 As shown, the present application also provides a battery cell, including:

[0123] The housing 100 as described above;

[0124] A cover plate assembly 200, covering the housing opening 140, and forming a receiving space 300 with the housing 100;

[0125] The bare battery cell 400 is located in the accommodation space 300;

[0126] The second angle plate section 132 is located above the bare battery cell 400 away from the edge of the shell opening 140 , and at least a portion of the third angle plate section 133 is disposed opposite to the bare battery cell 400 .

[0127] Exemplarily, the housing 100 may be an aluminum housing or a steel housing.

[0128] Illustratively, a top end of the housing 100 is configured with a housing opening 140 .

[0129] Exemplarily, the insulating member 220 may be a plastic member.

[0130] Exemplarily, the cap assembly 200 further includes a pole 230 penetrating the cap body 210 and the insulating member 220 . The pole 230 may include a positive pole and a negative pole. The pole 230 is insulated and sealedly connected to the cap body 210 .

[0131] Exemplarily, the bare cell 400 includes a plurality of positive plates, a plurality of negative plates, and a separator isolating the positive plates and the negative plates. The positive plates, the negative plates, and the separator may form a laminate structure or a winding structure. A portion of each positive plate extends out of the bare cell 400 to form a positive electrode ear, which is electrically connected to the positive electrode column. A portion of each negative plate extends out of the bare cell 400 to form a negative electrode ear, which is electrically connected to the negative electrode column.

[0132] Among them, because the second section 132 of the angle plate is the thickest area in the connecting angle plate 130, that is, the distance between it and the bare battery cell 400 is closest, in order to avoid it causing squeezing damage to the expanded bare battery cell 400, it is arranged above the bare battery cell 400.

[0133] Among them, because the maximum thickness of the third section of the angle plate 133 is less than or equal to the maximum thickness of the second section of the angle plate 132, especially when the maximum thickness of the third section of the angle plate 133 is less than the maximum thickness of the second section of the angle plate 132, it means that the third section of the angle plate 133 is farther away from the bare battery cell than the second section of the angle plate 132. Therefore, setting part or all of the third section of the angle plate 133 relative to the bare battery cell 400 is not easy to cause extrusion damage to the expanded bare battery cell 400.

[0134] In some embodiments, Figure 3 As shown, the cover assembly 200 includes a cover body 210 and an insulating member 220 connected to the cover body 210 and close to the accommodating space 300;

[0135] In the height direction of the shell, the distance from the edge of the second plate section 112 close to the first plate section 111 to the shell opening 140 is a first distance L1, and the distance from the surface of the insulating member 220 away from the cover body 210 to the shell opening 140 is a second distance L2, and the first distance L1 is greater than the second distance L2.

[0136] Exemplarily, the cover plate body 210 may be welded to a plate segment 111 of the first side plate 110 .

[0137] The first side plate 110 includes a first plate section 111 and a second plate section 112 connected up and down. Since the first plate section 111 is close to the shell opening 140 and needs to be connected to the cover body 210, the thickness of the first plate section 111 is set to be thicker, which can avoid the appearance of wavy edges during the processing due to the shell 100 being too thin, thereby ensuring the connection strength between the first plate section 111 and the cover body 210. For the second plate section 112 that is far from the shell opening 140, even if its thickness is set to be thinner, it will not have an adverse effect on the connection between the shell 100 and the cover body 210. Therefore, in the above-mentioned embodiment, the thickness of the second plate section 112 is set to be thinner, which can not only achieve the purpose of reducing the weight and preparation cost of the battery, but also help to expand the accommodation space 300, so that the battery can have a larger energy density.

[0138] However, in order to take into account the above-mentioned beneficial effects, it is necessary to reasonably set the positions of the first plate section 111 and the second plate section 112. If L1≤L2, the second plate section 112 will extend to a position too close to the shell opening 140, which will cause the size of the first plate section 111 along the height direction of the shell 100 to be too small. During the processing of the shell 100, the shell opening 140 still has the risk of deformation, which may reduce the connection strength between the shell 100 and the cover plate body 210. Therefore, in this embodiment, L1 and L2 are limited to L1>L2, so that the size of the first plate section 111 along the height direction of the shell 100 can be larger, which is sufficient to ensure that the shell opening 140 will not be deformed during the processing of the shell 100.

[0139] In the battery cell provided in the embodiment of the present application, the distance L1 from the edge of the first plate section 112 close to the first plate section 111 to the shell opening 140 and the distance L2 from the surface of the insulating member 220 away from the cover body 210 to the shell opening 140 are limited to L1>L2. This can make the size of the second plate section 112 along the height direction of the shell 100 larger, further ensuring that the shell opening 140 will not be deformed, thereby ensuring a strong connection strength between the shell 100 and the cover body 210, which helps to improve the sealing and safety of the battery cell.

[0140] Based on the same invention communication, the present application also provides a battery. Specifically, the battery includes the battery cell as described in any of the above items.

[0141] Illustratively, when the battery has the battery cell described in the above embodiment, it can have all the advantages and beneficial effects of the battery cell described in the above embodiment, which will not be described in detail here.

[0142] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0143] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0144] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0145] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0146] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0147] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A housing, characterized in that: The housing has a housing opening along a height direction of the housing, and the housing comprises: A first side plate and a second side plate are arranged adjacent to each other along the circumference of the shell opening, and the maximum thickness of the first side plate is smaller than the maximum thickness of the second side plate; A connecting angle plate connects the first side plate and the second side plate, wherein the connecting angle plate is sequentially provided with angle plate section one, angle plate section two and angle plate section three in the height direction of the shell, wherein the thickness of angle plate section two is greater than the thickness of angle plate section one; and the maximum thickness of angle plate section three is less than or equal to the maximum thickness of angle plate section two.

2. The housing according to claim 1, characterized in that The thickness of the second section of the corner plate gradually increases in a direction from the side close to the first side plate to the side close to the second side plate; and / or, The thickness of the second section of the corner plate gradually increases in a direction from a side close to the shell opening to a side far from the shell opening.

3. The housing according to claim 2, characterized in that: The difference between the maximum thickness and the minimum thickness of the two sections of the angle plate is less than or equal to 0.3 mm.

4. The housing according to claim 1, characterized in that The thickness of the three sections of the angle plate gradually increases in a direction from the side close to the first side plate to the side close to the second side plate.

5. The housing according to claim 4, characterized in that: The three sections of the angle plate include a first section and a second section connected sequentially in the height direction of the shell. The first section is arranged close to the shell opening, and the thickness of the first section increases in a direction from the side close to the first side plate to the direction close to the second side plate. The thickness of the first section increases more than that of the second section.

6. The housing according to claim 5, characterized in that The first section includes a gusset upper section and a gusset transition section connected to each other, and the gusset transition section is located between the gusset upper section and the second section; The thickness of the angle plate transition section gradually decreases from the angle plate upper section to the second section.

7. The housing according to claim 5, characterized in that The thickness difference between the maximum thickness and the minimum thickness of the upper section of the angle plate is less than or equal to 0.4 mm; the thickness difference between the maximum thickness and the minimum thickness of the second section is less than or equal to 0.3 mm.

8. The housing according to claim 1, characterized in that The first side plate is provided with a first plate section and a second plate section connected to each other in the height direction of the shell, the thickness of the first plate section is greater than the thickness of the second plate section, and the first plate section is arranged close to the shell opening.

9. The housing according to claim 8, characterized in that The one plate section comprises a plate upper section and a plate transition section connected to each other, wherein the plate transition section is connected between the one plate upper section and the one plate section two; The thickness of the plate transition section gradually decreases from the plate upper section to the plate second section.

10. The housing according to claim 9, characterized in that The upper section of the plate is connected to both the first section and the second section of the angle plate; the second section of the plate is connected to the third section of the angle plate, and the thickness of the second section of the plate is less than the maximum thickness of the third section of the angle plate.

11. The housing according to claim 10, characterized in that The difference in thickness between the upper section of the plate and the second section of the plate is less than or equal to 0.3 mm; the length of the first section of the plate in the height direction of the shell is greater than or equal to 0.5 mm; the length of the transition section of the plate in the height direction of the shell is greater than or equal to 0.3 mm.

12. The housing according to claim 1, characterized in that The second side plate is provided with two plate sections one and two plate sections two in sequence in the height direction of the shell, the thickness of the two plate sections one is smaller than the thickness of the two plate sections two, and the two plate sections one is arranged close to the shell opening.

13. The housing according to claim 12, characterized in that The two plates and two sections are provided with a first sub-section and a second sub-section connected to each other in the height direction of the shell, the first sub-section is arranged close to the shell opening, the thickness of the first sub-section is greater than the thickness of the second sub-section, the first sub-section is connected to the angle plate section two and a part of the angle plate section three, and the second sub-section is connected to another part of the angle plate section three.

14. The battery according to claim 13, characterized in that The first subsection includes a second plate upper section and a second plate transition section; The thickness of the second-plate transition section gradually decreases from the second-plate upper section to the second subsection.

15. The housing according to claim 12, characterized in that The first section of the second plate is connected to the first section of the angle plate, and the second section of the second plate is connected to the second section of the angle plate and the third section of the angle plate; the thickness of the second section of the second plate is greater than or equal to the maximum thickness of the third section of the angle plate, and less than or equal to the maximum thickness of the second section of the angle plate.

16. The housing according to claim 14, characterized in that The thickness difference between the second plate upper segment and the second sub-segment is less than or equal to 0.3 mm; the length of the second plate transition segment in the height direction of the shell is greater than or equal to 0.3 mm.

17. The housing according to claim 1, characterized in that An area of ​​the first side plate is greater than an area of ​​the second side plate.

18. A battery cell, characterized in that: include: The housing according to any one of claims 1 to 17; A cover plate assembly, covering the opening of the shell and forming a receiving space with the shell; A bare battery cell is located in the accommodation space; The second section of the angle plate is located above the bare battery cell, away from the edge of the shell opening, and at least part of the third section of the angle plate is arranged opposite to the bare battery cell.

19. The battery cell according to claim 18, characterized in that: The cover plate assembly comprises a cover plate body and an insulating member connected to a side of the cover plate body close to the accommodation space; In the height direction of the shell, the distance from the edge of the second plate section close to the first plate section to the shell opening is a first distance, and the distance from the surface of the insulating member away from the cover body to the shell opening is a second distance, and the first distance is greater than the second distance.

20. A battery, characterized in that: Comprising a battery cell as described in any one of claims 18-19.

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