Battery shell and battery

Abstract

The utility model discloses a battery shell and a battery. The battery shell comprises a shell body and a top cover, the shell is provided with an opening, and the opening is used for accommodating the battery cell in the shell; the top cover comprises a cover plate main body and a pole column, the cover plate main body is used for sealing the opening, and the pole column is used for being connected with a tab led out from the battery cell; the cover plate main body comprises a first side part and a second side part which are oppositely arranged, a lower space of the first side part is used for accommodating a tab in a bent state, the second side part is convexly provided with a convex structure towards the direction of the shell, one side, corresponding to the convex structure, of the shell is provided with an inclined opening structure, and the inclined opening structure is arranged in the inclined opening structure. The protruding structure abuts against the top face of the bevel structure, and the bevel structure is used for limiting the second side part from inclining downwards relative to the shell. The utility model mainly solves the technical problems that the top cover can enter the shell slowly and is easy to incline and unlevel in the manufacturing process of the current battery with only one side internally provided with the pole lug.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery shell and a battery. Background Art

[0002] In order to achieve the goal of extreme simplification, current batteries are designed to place only one battery cell in the battery shell. After the single-wound battery cell is placed in the shell, only one side of the battery cell has a bent tab (this tab is mainly used to allow the electrode on the battery cell to be exported to the top cover. In addition, the tab will provide a certain support for the top cover after being bent internally). The other side opposite to the tab is suspended. When the top cover is subsequently assembled into the shell and subsequently welded to each other, because only one side of the top cover has the battery cell tab and the other side of the top cover has no tab support, there is a problem of uneven force on the top cover after it is installed in the shell, which makes the top cover prone to tilting and unevenness after entering the shell, which in turn leads to slow efficiency of top cover entering the shell and low yield of subsequent top cover welding on the shell.

[0003] Therefore, there is a need to improve the existing technology. Utility Model Content

[0004] The utility model provides a battery shell and a battery, which mainly solves the technical problems that the top cover of a battery having a tab on only one side thereof is slow to be inserted into the shell and is prone to tilting and unevenness during the manufacturing process.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A battery casing, comprising a shell and a top cover;

[0007] The shell is provided with an opening, the opening being used to accommodate the battery cell in the shell; the top cover comprises a cover body and a pole provided on the cover body, the cover body being used to seal the opening, and the pole being used to connect with the tab led out from the battery cell;

[0008] The cover plate body includes a first side portion and a second side portion that are arranged opposite to each other. The space below the first side portion is used to accommodate the pole ear in a bent state. The second side portion is provided with a protruding structure protruding toward the shell. The shell is provided with an oblique structure on a side corresponding to the protruding structure. The protruding structure is abutted against the top surface of the oblique structure. The oblique structure is used to limit the second side portion from tilting downward relative to the shell.

[0009] In one of the technical solutions, a concave V-shaped groove structure is provided on the oblique structure, and the convex structure is embedded in the V-shaped groove structure.

[0010] In one technical solution, the shell includes a first contour edge, a second contour edge, a third contour edge, and a fourth contour edge that are arranged around the outer periphery of the opening and are sequentially connected end to end, wherein the first contour edge is arranged opposite to the third contour edge, the second contour edge is arranged opposite to the fourth contour edge, the first contour edge corresponds to the second side portion, the third contour edge corresponds to the first side portion, the first contour edge is lower than the third contour edge, and the second contour edge and the fourth contour edge are both inclined to form the oblique opening structure;

[0011] The V-shaped groove structure is provided at the connection point between the first contour edge and the second contour edge, and at the connection point between the first contour edge and the fourth contour edge.

[0012] In one of the technical solutions, a first inner chamfer is provided on the first contour edge, and a first outer chamfer matching the first inner chamfer is provided on the outer edge of the protruding structure.

[0013] In one of the technical solutions, a second outer chamfer is provided on the second contour edge, and a second inner chamfer matching the second outer chamfer is provided on the top cover.

[0014] In one of the technical solutions, a third inner chamfer is provided on the third contour edge, and a third outer chamfer matching the third inner chamfer is provided on the top cover.

[0015] In one of the technical solutions, a fourth outer chamfer is provided on the fourth contour edge, and a fourth inner chamfer matching the fourth outer chamfer is provided on the first side portion of the top cover.

[0016] In one of the technical solutions, the battery housing has a square shape, the first side portion and the second side portion are arranged on both sides of the cover body in the width direction, and the first contour edge and the third contour edge are arranged on both sides of the shell in the width direction.

[0017] In one of the technical solutions, the height of the bottom end of the oblique structure is not lower than the height of the top surface of the battery cell.

[0018] The present application also provides a battery, comprising a battery cell and a battery casing as described above, wherein the battery cell is accommodated in the casing, and a tab is extended from the battery cell, wherein the tab is bent and located below the first side portion of the top cover.

[0019] Compared with the prior art, the battery housing provided by the present invention has at least the following beneficial effects:

[0020] This solution provides a protruding structure protruding toward the shell on the second side portion of the cover plate body, and provides an oblique structure that cooperates with the protruding structure on the side of the shell corresponding to the protruding structure, thereby preventing the second side portion of the top cover from tilting downward after entering the shell. That is, it solves the problem of the top cover tilting unevenly after entering the shell, which is conducive to improving the efficiency of the top cover entering the shell and improving the welding quality of the top cover and the shell, thereby improving the production efficiency and production quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 An exploded view of the structure of a battery provided in an embodiment of the present application;

[0023] Figure 2 An exploded view of the structure of the battery housing provided in an embodiment of the present application at a first angle;

[0024] Figure 3 for Figure 2 An exploded view of the battery housing at a second angle is shown;

[0025] Figure 4 for Figure 2 The battery housing is shown as an exploded view at a third angle;

[0026] Figure 5 This is a schematic diagram of the structure of the top cover provided in an embodiment of the present application when viewed from above.

[0027] Reference numerals:

[0028] 1. Battery shell; 2. Battery cell; 21. Tab;

[0029] 11. Housing; 111. Opening; 112. Bevel structure; 113. V-groove structure; 114. First contour edge; 1141. First inner chamfer; 115. Second contour edge; 1151. Second outer chamfer; 116. Third contour edge; 1161. Third inner chamfer; 117. Fourth contour edge; 1171. Fourth outer chamfer;

[0030] 12. Top cover; 121. Cover plate body; 1211. First side portion; 1212. Second side portion; 1213. Raised structure; 12131. First outer chamfer; 1214. Second inner chamfer; 1215. Third outer chamfer; 1216. Fourth inner chamfer; 122. Pole. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms, "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0036] Please also refer to Figures 1 to 5 An embodiment of the present invention provides a battery, including a battery casing 1 and a battery cell 2, wherein two pole tabs 21 are led out from the battery cell 2, one of the pole tabs 21 has positive electrical conductivity, and the other pole tab 21 has negative electrical conductivity, wherein the battery casing 1 specifically includes a shell 11 and a top cover 12, the shell 11 is provided with an opening 111, and this opening 111 is used to allow the battery cell 2 to be installed into the shell 11, and the top cover 12 specifically includes a cover body 121 and a pole 122, the cover body 121 is used to seal the opening 111 so that foreign matter cannot enter the interior of the shell 11, and the cover body 121 is preferably connected to two poles 122, one pole 122 is used to connect to the pole tab 21 with positive electrical conductivity, and the other pole 122 is used to connect to the pole tab 21 with negative electrical conductivity.

[0037] Specifically, the cover body 121 includes a first side portion 1211 and a second side portion 1212 that are arranged opposite to each other. After the top cover 12 is installed in the shell 11, the pole ear 21 will be in a bent state and located below the first side portion 1211. At this time, the pole ear 21 in the bent state will have a certain supporting effect on the first side portion 1211, while the second side portion 1212 of the traditional cover body 121 is suspended due to the lack of the pole ear 21 support. In order to prevent the second side portion 1212 from tilting downward, this embodiment provides a convex portion 1212 protruding toward the shell 11. The raised structure 1213 makes the overall shape of the cover body 121 have an L-shaped design. In addition, this embodiment also opens an oblique structure 112 on the side of the shell 11 corresponding to the raised structure 1213. The top surface of the oblique structure 112 is against the raised structure 1213, so that the oblique structure 112 can limit the second side portion 1212 from tilting downward relative to the shell 11, that is, it solves the problem of uneven tilting after the top cover 12 is inserted into the shell, which is conducive to improving the efficiency of the top cover 12 entering the shell and improving the welding quality of the top cover 12 and the shell 11, so as to improve the production efficiency and production quality of the battery. More specifically, the height of the raised structure 1213 protruding downward can be 5mm-10mm. Correspondingly, the height difference of the oblique structure 112 is the same as the height of the raised structure 1213 protruding downward, that is, the height difference of the oblique structure 112 is also 5mm-10mm.

[0038] like Figure 1 As shown, the height of the bottom end of the oblique structure 112 should not be lower than the height of the top surface of the battery cell 2, so that the battery cell 2 will not protrude outward from the oblique structure 112, thereby preventing the top cover 12 from rubbing against the battery cell 2 when assembled on the shell 11, and ensuring that the top cover 12 will not cause damage to the battery cell 2 when inserted into the shell.

[0039] In this embodiment, a downwardly recessed V-shaped groove structure 113 is provided on the bevel structure 112, and the above-mentioned protruding structure 1213 is embedded in this V-shaped groove structure 113, so that after the top cover 12 is assembled on the shell 11, it will not tilt downward under the restriction of the V-shaped groove structure 113, and it is not easy to deviate in the X direction, thereby improving the position accuracy of the top cover 12 assembled on the shell 11.

[0040] In this embodiment, the outer shape of the battery shell 1 is preferably square. At this time, the shell 11 is equivalent to including a first contour edge 114, a second contour edge 115, a third contour edge 116 and a fourth contour edge 117 which are arranged around the outer periphery of the opening 111 and are connected end to end in sequence. In fact, the first contour edge 114 and the third contour edge 116 are arranged opposite to each other, and the second contour edge 115 and the fourth contour edge 117 are arranged opposite to each other, wherein the first contour edge 114 is correspondingly located below the second side 1212 of the cover body 121, and the third contour edge 116 is correspondingly located below the first side 1211 of the cover body 121, and the first contour edge 114 is lower than the third contour edge 116 and the second contour edge 115 and the fourth contour edge 117 are both inclined to form the above-mentioned oblique mouth structure 112. The V-groove structures 113 are provided at the junctions of the first contour edge 114 and the second contour edge 115, and at the junctions of the first contour edge 114 and the fourth contour edge 117. This allows both ends of the top cover 12 in the X direction to be embedded in a corresponding V-groove structure 113, thereby improving the stability of the top cover 12 when assembled to the housing 11. This further ensures that the second side portion 1212 of the top cover 12 does not tilt downward when assembled to the housing 11, and further prevents the top cover 12 from shifting relative to the housing 11 in the X direction. Given that the two tabs 21 extending from the top of the battery cell 2 are spaced apart along the X direction, the first contour edge 114 and the third contour edge 116 are preferably provided on either side of the housing 11 in the width direction (i.e., the Y direction). Correspondingly, the first side portion 1211 and the second side portion 1212 are provided on either side of the cover plate body 121 in the width direction (i.e., the Y direction).

[0041] In this embodiment, a first inner chamfer 1141 is provided on the first contour edge 114, and a first outer chamfer 12131 is provided on the outer edge of the protruding structure 1213 to match the first inner chamfer 1141. Through such a design, when the top cover 12 is assembled to the shell 11, the top cover 12 can be prevented from being offset in the positive direction of the Y direction.

[0042] In this embodiment, a second outer chamfer 1151 is provided on the second contour edge 115, and a second inner chamfer 1214 is provided on the top cover 12 to match the second outer chamfer 1151. Through such a design, when the top cover 12 is assembled to the shell 11, the top cover 12 can be prevented from deviating in the positive direction of the X direction.

[0043] In this embodiment, a fourth outer chamfer 1171 is provided on the fourth contour edge 117, and a fourth inner chamfer 1216 that matches the fourth outer chamfer 1171 is provided on the first side portion 1211 of the top cover 12. Through such a design, when the top cover 12 is assembled to the shell 11, the top cover 12 can be prevented from deviating in the opposite direction of the X direction.

[0044] In this embodiment, a third inner chamfer 1161 is provided on the third contour edge 116, and a third outer chamfer 1215 is provided on the top cover 12 to match the third inner chamfer 1161. Through such a design, when the top cover 12 is assembled to the shell 11, the second outer chamfer 1151 and the second inner chamfer 1214 can be more easily matched and fitted, and the fourth inner chamfer 1171 and the fourth outer chamfer 1216 can also be more easily matched and fitted. In addition, the third inner chamfer 1161 can prevent the top cover 12 from deviating in the opposite direction along the Y direction.

[0045] This section summarizes the above four sections. By providing chamfer structures on the first contour edge 114, the second contour edge 115, the third contour edge 116, and the fourth contour edge 117, and also providing corresponding chamfer structures on the top cover 12, the top cover 12 can be prevented from tilting after being assembled to the shell 11 while being restricted in both the X and Y directions, thereby preventing the top cover 12 from offsetting after being assembled to the shell 11. In other words, the positional accuracy of the top cover 12 when assembled to the shell 11 is improved, which is conducive to the efficient and high-quality completion of the welding operation of the top cover 12 and the shell 11. The inclination angle of each of the above-mentioned outer and inner chamfers is 45°, and the value of each outer and inner chamfer is preferably 0.6mm. With this solution, since the top cover 12 can be firmly assembled on the shell 11, the process of pre-welding the top cover 12 can be omitted. The top cover 12 can be directly welded to the shell 11, which is beneficial to greatly improve the welding efficiency of the top cover 12 and the shell 11, and further beneficial to greatly improve the production efficiency of the battery.

[0046] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A battery casing, characterized in that: It includes a housing (11) and a top cover (12); The shell (11) is provided with an opening (111), and the opening (111) is used to accommodate the battery cell in the shell (11); the top cover (12) comprises a cover body (121) and a pole (122) provided on the cover body (121); the cover body (121) is used to seal the opening (111), and the pole (122) is used to connect to a pole lug led out from the battery cell; The cover plate body (121) comprises a first side portion (1211) and a second side portion (1212) which are arranged opposite to each other. The space below the first side portion (1211) is used to accommodate the tab in a bent state. The second side portion (1212) is provided with a protruding structure (1213) protruding toward the shell (11). The shell (11) is provided with an oblique structure (112) on a side corresponding to the protruding structure (1213). The top surface of the oblique structure (112) is used to abut against the protruding structure (1213) to limit the second side portion (1212) from tilting downward relative to the shell (11).

2. The battery case according to claim 1, wherein A concave V-shaped groove structure (113) is provided on the oblique mouth structure (112), and the protruding structure (1213) is embedded in the V-shaped groove structure (113).

3. The battery case according to claim 2, wherein: The shell (11) comprises a first contour edge (114), a second contour edge (115), a third contour edge (116), and a fourth contour edge (117) which are arranged around the outer periphery of the opening (111) and are connected end to end in sequence, wherein the first contour edge (114) is arranged opposite to the third contour edge (116), the second contour edge (115) is arranged opposite to the fourth contour edge (117), the first contour edge (114) corresponds to the second side portion (1212), the third contour edge (116) corresponds to the first side portion (1211), the first contour edge (114) is lower than the third contour edge (116), and the second contour edge (115) and the fourth contour edge (117) are both arranged in an inclined manner to form the oblique opening structure (112); The V-shaped groove structure (113) is provided at the connection point between the first contour edge (114) and the second contour edge (115), and at the connection point between the first contour edge (114) and the fourth contour edge (117).

4. The battery case according to claim 3, wherein: A first inner chamfer (1141) is provided on the first contour edge (114), and a first outer chamfer (12131) matching the first inner chamfer (1141) is provided on the outer edge of the protruding structure (1213).

5. The battery case according to claim 3, wherein: A second outer chamfer (1151) is provided on the second contour edge (115), and a second inner chamfer (1214) matching the second outer chamfer (1151) is provided on the top cover (12).

6. The battery case according to claim 3, wherein: A third inner chamfer (1161) is provided on the third contour edge (116), and a third outer chamfer (1215) matching the third inner chamfer (1161) is provided on the top cover (12).

7. The battery case according to claim 3, wherein: A fourth outer chamfer (1171) is provided on the fourth contour edge (117), and a fourth inner chamfer (1216) matching the fourth outer chamfer (1171) is provided on the first side portion (1211) of the top cover (12).

8. The battery case according to claim 3, wherein: The battery housing has a square shape, the first side portion (1211) and the second side portion (1212) are respectively arranged on both sides of the cover plate body (121) in the width direction, and the first contour edge (114) and the third contour edge (116) are respectively arranged on both ends of the opening (111) in the width direction.

9. The battery housing according to claim 1, wherein: The height of the bottom end of the oblique structure (112) is not lower than the height of the top surface of the battery cell.

10. A battery, characterized in that: The battery case (1) comprises a battery cell (2) and a battery housing (1) according to any one of claims 1 to 9, wherein the battery cell (2) is accommodated in the housing (11), and a tab (21) is extended from the battery cell (2), and the tab (21) is in a bent state and is located below the first side portion (1211) of the top cover (12).

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