Battery shell and single battery

Abstract

The utility model discloses a battery shell and a single battery, the battery shell comprises a metal main shell and a metal cover body, and the metal main shell is provided with an accommodating cavity for accommodating a core package and an opening communicated with the accommodating cavity; the metal cover body is inserted into the containing cavity through the opening and abuts against the bottom of the containing cavity to seal the opening, and the metal main shell and the metal cover body are connected at the opening in a welded mode. According to the utility model, by arranging the battery shell into the metal main shell and the metal cover body which are separated from each other, when the metal main shell is connected with the metal cover body, the metal cover body is partially inserted into the accommodating cavity, so that the metal cover body is partially propped against the bottom of the accommodating cavity for positioning; and then the metal cover body and the metal main shell are welded through the welding head. The welding positions of the metal cover body and the metal main shell are on the same plane, so that the metal main shell does not need to be turned over by a welding clamp in the welding process of the welding head, the process complexity of the battery shell is further reduced, and the reject ratio of the single battery can be reduced.

Description

Technical Field

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

[0002] In recent years, with the development of battery technology and the improvement of people's living standards, digital products, power tools and electric toys require core packs with larger and larger capacity. Aluminum-plastic film soft-pack batteries occupy a large space due to the need for packaging of aluminum-plastic film. In order to increase the capacity, metal shell core packs are gradually being designed. Although metal shell core packs can effectively increase battery capacity while keeping the overall size unchanged, the metal shell of the metal shell core pack is currently made because the multiple welding positions of the metal shell are not on the same plane, and the metal shell needs to be turned over during welding, which makes the welding process more complicated, the production efficiency is very low, and the defect rate is very high. Utility Model Content

[0003] An object of the present invention is to provide a battery housing and a single cell, which aims to reduce the process complexity of the battery housing and thus reduce the defective rate of the single cell.

[0004] In order to achieve the above object, the utility model provides a solution: a battery housing, comprising:

[0005] A metal main shell is provided with a receiving cavity for receiving the core package and an opening communicating with the receiving cavity; and

[0006] The metal cover is inserted into the accommodating cavity through the opening and abuts against the bottom of the accommodating cavity to close the opening. The metal main shell and the metal cover are welded and connected at the opening.

[0007] Optionally, the metal main shell includes a main bottom wall and a plurality of main side walls, the plurality of main side walls and the main bottom wall are connected and jointly enclosed to form the accommodating cavity, and the plurality of main side walls are enclosed to form the opening;

[0008] The metal cover body includes a cover top wall and multiple cover side walls, the multiple cover side walls are connected to the edges of the cover top wall, the cover top wall covers the opening, the side surfaces of the cover side walls are fitted with the main side walls, and the bottom of at least one of the multiple cover side walls is abutted against the main bottom wall.

[0009] Optionally, the number of the cover side walls is two, and the two cover side walls are arranged on two opposite edges of the cover top wall; or, the number of the cover side walls is three, and the three cover side walls are arranged on adjacent edges of the cover top wall; or, the number of the cover side walls is four, and the four cover side walls are arranged on adjacent edges of the cover top wall.

[0010] Optionally, the metal main shell is provided with a pole hole, the pole hole is used to assemble the pole, and the opening and the pole hole are respectively arranged on two adjacent sides of the metal main shell.

[0011] Optionally, the metal main shell has a horizontal direction and a height direction perpendicular to each other, the metal main shell is provided with the opening in the height direction, the metal main shell is provided with the pole hole in the horizontal direction, the height of the metal main shell in the height direction is D, and the length of the metal main shell in the horizontal direction is H, D <H。

[0012] Optionally, the multiple cover side walls include a first cover side wall and a second cover side wall, the first cover side wall and the second cover side wall are arranged on opposite sides of the cover top wall, the opposite sides of the first cover side wall and the second cover side wall are respectively fitted with the corresponding main side walls, the bottoms of the first cover side wall and the second cover side wall are abutted with the main bottom wall, and the pole hole is arranged on the main side wall that is not fitted with the first cover side wall and the second cover side wall.

[0013] Optionally, the multiple cover side walls include a first cover side wall and a second cover side wall, the first cover side wall and the second cover side wall are arranged on opposite sides of the cover top wall, the opposite sides of the first cover side wall and the second cover side wall are respectively fitted with the corresponding main side walls, the bottom of the first cover side wall is abutted against the main bottom wall, the bottom of the second cover side wall is spaced from the main bottom wall to form an avoidance space, and the pole hole is arranged in the avoidance space.

[0014] Optionally, the metal cover body further includes an extension portion, the extension portion is connected to the edge of the cover side wall away from the cover top wall, the extension portion and the cover top wall extend on the same side of the cover side wall, and the cover side wall abuts against the main bottom wall through the extension portion.

[0015] Optionally, the metal main shell is an integral stamping structure, and the metal cover is an integral stamping structure.

[0016] In order to achieve the above object, the utility model provides a solution: a single cell battery, the single cell battery comprising: a core pack and a battery shell as described above, the core pack being arranged in the battery shell.

[0017] The beneficial effects of the utility model are:

[0018] The embodiment of the utility model sets the battery shell as a metal main shell and a metal cover body separated from each other. When connecting the metal main shell and the metal cover body, first insert part of the metal cover body into the accommodating cavity so that the part of the metal cover body abuts against the bottom of the accommodating cavity for positioning, and then weld the metal cover body and the metal main shell through the welding head. Since the welding positions of the metal cover body and the metal main shell are on the same plane, the welding fixture does not need to flip the metal main shell during the welding process of the welding head, thereby reducing the process complexity of the battery shell, and thus can reduce the defective rate of single cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the production process of a metal shell core package in the related art;

[0021] Figure 2 It is a schematic diagram of the top view structure of the hollow shell in the related art and a schematic diagram of the cross section of the AA section;

[0022] Figure 3 1 is a schematic diagram of the planar structure of the bottom plate in the related art and a partial enlarged schematic diagram of the circle I thereof;

[0023] Figure 4 yes Figure 3 A schematic diagram of the top view of the shell assembly formed by connecting the hollow shell and the bottom plate, and a schematic diagram of the cross-section BB thereof;

[0024] Figure 5 It is a schematic diagram of the planar structure of the cover plate in the related art and a partial enlarged schematic diagram of the circle C thereof;

[0025] Figure 6 yes Figure 5 A schematic diagram of the top view of the metal shell formed by connecting the cover plate, the core package and the shell assembly, and a schematic diagram of the cross-section of the DD section;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the battery housing provided by the embodiment of the utility model;

[0027] Figure 8 yes Figure 7 Schematic diagram of the exploded structure of the battery housing;

[0028] Fig. 9 yes Figure 7 A schematic cross-sectional structural diagram of a battery housing;

[0029] Fig.10 yes Fig. 9 A schematic diagram of the local enlarged structure at circle E in FIG.

[0030] Fig.11 It is a schematic diagram of the cross-sectional structure of a battery housing in another embodiment of the utility model and a schematic diagram of its partial method;

[0031] Fig.12 is a schematic cross-sectional structural diagram of a battery housing in another embodiment of the utility model;

[0032] Fig.13 yes Fig.12 A schematic diagram of the local enlarged structure at the circle F in FIG.

[0033] Fig.14 is a schematic diagram of the exploded structure of a single cell in another embodiment of the utility model;

[0034] Fig.15 It is a schematic diagram of the manufacturing process of a single cell in an embodiment of the utility model;

[0035] Fig.16 It is a schematic diagram of the planar structure of the metal main shell in the embodiment of the utility model;

[0036] Fig.17 yes Fig.16 A schematic cross-sectional view of the metal main shell at GG;

[0037] Fig.18 It is a schematic diagram of the planar structure of the metal cover in the embodiment of the utility model;

[0038] Fig.19 It is a schematic diagram of the cross-sectional structure after the core package, metal cover and metal main shell are assembled.

[0039] Explanation of the accompanying drawings: 1. hollow shell; 2. bottom plate; 3. cover plate; 4. core pack; 100. battery shell; 10. metal main shell; 11. accommodating cavity; 12. opening; 13. main bottom wall; 14. main side wall; 15. pole hole; 16. liquid filling port; 20. metal cover; 21. cover top wall; 22. cover side wall; 22a. first cover side wall; 22b. second cover side wall; 23. avoidance space; 24. extension part; 30. pole; 00. single cell; 200. core pack. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0042] It should also 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 there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0043] See also Figure 1 , Figure 1 The figure is a schematic diagram of the manufacturing process of a metal shell battery cell in the related art. The manufacturing process of a metal shell battery cell in the related art specifically includes the following steps:

[0044] Step S10: making a hollow shell.

[0045] Specific as Figure 2 As shown, Figure 2 It is a schematic diagram of the top view of the hollow shell 1 in the related art and a schematic diagram of the cross section of the AA section. The hollow shell 1 is formed of a thin sheet metal material, which has two opposite sides, and positioning notches that match each other are formed on the two sides. The thin sheet metal material is wound so that the two opposite sides are engaged with each other, and the positioning notches match each other at this time, and then the two sides are welded together by welding, thereby forming a cylindrical hollow shell 1.

[0046] Step S20: making a bottom plate, and welding the hollow shell 1 and the bottom plate to form a shell assembly.

[0047] Specific as Figure 3 and Figure 4 As shown, Figure 3 1 is a schematic diagram of the planar structure of the bottom plate 2 in the related art and a partial enlarged schematic diagram of the circle I thereof, Figure 4 yes Figure 3The schematic diagram of the top view of the shell assembly formed by connecting the hollow shell 1 and the bottom plate 2 and the schematic diagram of the cross section BB. The bottom plate 2 is a thin plate with a stepped positioning notch formed on its circumference. When welding the bottom plate 2 to the hollow shell 1, first press the positioning notch of the bottom plate 2 into the hollow shell 1, and then pass the welding head along the Figure 4 As shown in the figure, welding edge 1-welding fillet-welding edge 2-welding fillet-welding edge 3-welding fillet-welding edge 4-welding fillet are welded in sequence. Since the welding positions are not on the same plane during the welding process of the welding head, the welding fixture needs to constantly flip the hollow shell 1, which is very troublesome to manufacture, the production efficiency is very low, and the defect rate is very high.

[0048] Step S30: separately manufacture the cover plate and the core package, weld the core package and the cover plate, and then weld the cover plate and the shell assembly to form a metal shell.

[0049] Specific as Figure 5 and Figure 6 As shown, Figure 5 It is a schematic diagram of the planar structure of the cover plate 3 in the related art and a partial enlarged schematic diagram of the circle C. Figure 6 yes Figure 5 A schematic diagram of the top view of the structure of the metal shell formed by connecting the cover plate 3 and the core package and the shell assembly, and a schematic diagram of the cross-section of the DD section. The cover plate 3 is in the shape of a thin plate, and a stepped positioning notch is formed on its circumference, and a positive electrode column and a liquid injection port are provided on the cover plate 3. The core package 4 is formed by winding with a fully automatic winding machine, and has a positive electrode and a negative electrode. The positive electrode of the core package 4 and the positive electrode column installed on the cover plate 3 are welded together by a welding head, and the negative electrode of the core package 4 is directly welded to the cover plate 3. The positioning notch on the cover plate 3 is then pressed into the hollow shell 1, and the positive electrode column is welded together by a welding head. Figure 6 As shown in the figure, the welding edge 5-welding fillet-welding edge 6-welding fillet-welding edge 7-welding fillet-welding edge 8-welding fillet are welded in sequence. Since the welding positions are not on the same plane during the welding process of the welding head, the welding fixture needs to continuously flip the hollow shell 1, which is very troublesome to manufacture, the production efficiency is very low, and the defective rate is very high.

[0050] Step S40: injecting liquid into the metal shell through the liquid injection port, driving a sealing nail in the liquid injection port to seal the liquid injection port, and then forming, dividing the volume, and taking the core package off the line.

[0051] To sum up, in the related art, since the hollow shell 1 needs to be welded to the base plate 2 and the cover plate 3 separately, and since the welding positions are not on the same plane, the welding fixture needs to continuously flip the hollow shell 1 during the welding process, which makes the production very troublesome, the production efficiency is very low, and the defective rate is very high.

[0052] In order to improve the above problems existing in the related art, the present utility model embodiment proposes a new battery housing 100, specifically as follows Figures 7 to 10 As shown, Figure 7 1 is a schematic diagram of the three-dimensional structure of the battery housing 100 provided in an embodiment of the utility model. Figure 8 yes Figure 7 Schematic diagram of the exploded structure of the battery housing 100, Fig. 9 yes Figure 7 A schematic cross-sectional view of the battery housing 100 is shown in FIG. Fig.10 yes Fig. 9 The battery housing 100 includes a metal main shell 10 and a metal cover 20. The metal main shell 10 is provided with a receiving cavity 11 for receiving the core package and an opening 12 communicating with the receiving cavity 11. The metal cover 20 is inserted into the receiving cavity 11 through the opening 12 and abuts against the bottom of the receiving cavity 11 to close the opening 12. The metal main shell 10 and the metal cover 20 are welded and connected at the opening 12.

[0053] Specifically, the metal main shell 10 is provided with a receiving cavity 11 for receiving and protecting the core package, and the core package is placed in the receiving cavity 11 through an opening 12 provided on the metal main shell 10. The metal cover 20 is connected to the metal main shell 10 and covers the receiving cavity 11. The metal cover 20 can be positioned by setting the metal cover 20 to abut against the bottom of the receiving cavity 11. The utility model sets the battery shell 100 as a metal main shell 10 and a metal cover 20 separated from each other. When the metal main shell 10 and the metal cover 20 are connected, a part of the metal cover 20 is first inserted into the receiving cavity 11, so that the part of the metal cover 20 abuts against the bottom of the receiving cavity 11 for positioning, and then the metal cover 20 and the metal main shell 10 are welded by a welding head. Since the welding positions of the metal cover 20 and the metal main shell 10 are on the same plane, it is not necessary to flip the metal main shell 10 with a welding fixture during the welding process of the welding head, thereby reducing the process complexity of the battery shell 100, and thus reducing the defective rate of the single battery.

[0054] Furthermore, if Figure 8 and Fig.10 As shown, in this embodiment, the metal main shell 10 includes a main bottom wall 13 and a plurality of main side walls 14, the plurality of main side walls 14 and the main bottom wall 13 are connected to form a receiving cavity 11, and the plurality of main side walls 14 are connected to form an opening 12. The metal cover body 20 includes a cover top wall 21 and a plurality of cover side walls 22, the plurality of cover side walls 22 are connected to the edge of the cover top wall 21, the cover top wall 21 covers the opening 12, the side surface of the cover side wall 22 is in contact with the main side wall 14, and the bottom of at least one of the plurality of cover side walls 22 is in contact with the main bottom wall 13.

[0055] Specifically, in this embodiment, the main bottom wall 13 is arranged in a rectangular shape, and the number of main side walls 14 is four. The four main side walls 14 are respectively arranged on the four sides of the main bottom wall 13 and extend to the same side of the main bottom wall 13 to jointly enclose and form the accommodating cavity 11. The cover top wall 21 is arranged in a rectangular shape, and the number of cover side walls 22 is two. The two cover side walls 22 are respectively arranged on the two opposite edges of the cover top wall 21 and connected to the cover top wall 21, and extend to the same side of the cover top wall 21. When the metal cover body 20 is covered on the metal main shell 10, the cover side walls 22 are located in the accommodating cavity 11, and the outer side surface of the cover side wall 22 abuts against the main side wall 14 to seal the accommodating cavity 11, and the bottom of the cover side wall 22 facing away from the cover top wall 21 abuts against the main bottom wall 13. By arranging the two cover side walls 22 on opposite sides of the cover top wall 21 , the opposite sides of the metal cover body 20 can be supported on the main bottom wall 13 , thereby making the force on the metal cover body 20 more uniform.

[0056] Among them, in this embodiment, if Figure 8 As shown, the height of each cover side wall 22 disposed on the cover top wall 21 is equal at each location, so as to increase the supporting force of the main bottom wall 13 on the cover side wall 22. Alternatively, the height of part of the cover side wall 22 can be equal, and the height of part of the cover side wall 22 can be unequal, and the parts with equal heights can be arranged at intervals to form a plurality of spaced supporting points. By making the bottom of the part of the cover side wall 22 that is away from the cover top wall 21 abut against the main bottom wall 13, and by arranging the bottom of the part and the main bottom wall 13 at intervals, it is possible to avoid interference caused by excessive contact between the metal cover body 20 and the metal main shell 10, thereby reducing the processing accuracy of the metal cover body 20 and the metal main shell 10.

[0057] At present, in the assembly process of a single cell, the pole is first assembled to the metal cover, then the core package is welded to the pole, and finally the metal cover assembled with the pole and the core package is placed on the opening of the metal main shell and welded to the metal main shell, at which time the core package is placed in the accommodating cavity. Since the thickness of the metal cover is small and the weight of the assembled core package is large, the metal cover is easily deformed after the core package is assembled, which is not conducive to the welding of the metal cover and the metal main shell, and the metal cover assembled with the pole and the core package is not convenient for storage.

[0058] See also Figures 7 and 8 The metal main shell 10 is provided with a pole hole 15 for assembling a pole 30. The opening 12 and the pole hole 15 are respectively provided on two adjacent sides of the metal main shell 10. The pole 30 is inserted into the pole hole 15. The part of the pole 30 located in the accommodating cavity 11 is connected to the core package, and the part of the pole 30 located outside the accommodating cavity 11 is used to connect to the electrical device on the electronic device, that is, the pole 30 is used to electrically connect the core package and the electrical device.

[0059] In this embodiment, the opening 12 and the pole hole 15 are respectively arranged on the adjacent two sides of the metal main shell 10, so that the pole 30 and the metal cover 20 are respectively installed on the adjacent two sides of the metal main shell 10. When assembling the single battery 00, the pole 30 is first assembled on the pole hole 15 of the metal main shell 10, and then the core package is placed in the accommodating cavity 11, and the core package is welded to the pole 30. Finally, the metal cover 20 is covered on the opening 12 of the metal main shell 10 and welded to the metal main shell 10. In this way, the difficulty of assembling the single battery 00 can be simplified. Furthermore, since no heavy objects are attached to the metal cover 20, the storage and transportation of the metal cover 20 can be made more convenient, and the deformation of the metal cover 20 can be avoided to affect the welding connection with the metal main shell 10.

[0060] Furthermore, in this embodiment, the metal main shell 10 has a horizontal direction and a height direction which are perpendicular to each other. The metal main shell 10 is provided with an opening 12 in the height direction, and the metal main shell 10 is provided with a pole hole 15 in the horizontal direction.

[0061] like Figure 8 As shown, the horizontal direction of the metal main shell 10 is the horizontal plane direction formed by the X and Y axes, and the height direction of the metal main shell 10 is the Z axis direction perpendicular to the horizontal plane direction formed by the X and Y axes. The opening 12 of the metal main shell 10 extends along the Z axis direction and communicates with the accommodating cavity 11, so as to facilitate the placement of the core package into the accommodating cavity 11 through the opening 12. The utility model can facilitate the molding of the metal main shell 10 by opening the opening 12 of the metal main shell 10 in the height direction of the metal main shell 10.

[0062] Among them, Figures 8 to 10 As shown, in the present embodiment, the plurality of cover side walls 22 include a first cover side wall 22a and a second cover side wall 22b, and the first cover side wall 22a and the second cover side wall 22b are arranged on opposite sides of the cover top wall 21, and when the metal cover body 20 and the metal main shell 10 are connected, the opposite sides of the first cover side wall 22a and the second cover side wall 22b are respectively fitted with the corresponding main side walls 14, and the bottom of the first cover side wall 22a and the bottom of the second cover side wall 22b are abutted with the main bottom wall 13, and the pole hole 15 is arranged on the main side wall 14 where the main side wall 14 is not fitted with the first cover side wall 22a and the second cover side wall 22b.

[0063] Specifically, the cover top wall 21 is arranged in a rectangular shape, the first cover side wall 22a and the second cover side wall 22b are respectively connected to two opposite sides of the cover top wall 21, and the opposite sides of the first cover side wall 22a and the second cover side wall 22b refer to the outer side surface of the first cover side wall 22a and the outer side surface of the second cover side wall 22b, the outer side surface of the first cover side wall 22a is in contact with the inner side surface of the main side wall 14 opposite thereto, and the outer side surface of the second cover side wall 22b is in contact with the inner side surface of the main side wall 14 opposite thereto. By setting the bottom of the first cover side wall 22a and the bottom of the second cover side wall 22b in contact with the main bottom wall 13, the opposite sides of the cover top wall 21 can be subjected to uniform force. By setting the pole hole 15 on the main side wall 14 where the main side wall 14 is not in contact with the first cover side wall 22a and the second cover side wall 22b, the first cover side wall 22a and the second cover side wall 22b can be prevented from interfering with the pole 30.

[0064] Or, in other embodiments, Fig.11 As shown, Fig.11 It is a schematic diagram of the cross-sectional structure of the battery housing 100 in another embodiment of the utility model and a schematic diagram of a partial method thereof. The side of the first cover side wall 22a can be fitted with the main side wall 14, the bottom of the first cover side wall 22a can be abutted with the main bottom wall 13, the side of the second cover side wall 22b can be fitted with the main side wall 14, the bottom of the second cover side wall 22b can be spaced from the main bottom wall 13 to form an escape space 23, and the pole hole 15 is set at the escape space 23. In this embodiment, the second cover side wall 22b is fitted with the main side wall 14 of the metal main shell 10 where the pole hole 15 is opened. By forming the escape space 23 between the second cover side wall 22b and the main bottom wall 13, interference between the second cover side wall 22b and the pole 30 can be avoided.

[0065] Alternatively, in other optional embodiments, the number of cover side walls 22 can also be set to three, and the three cover side walls 22 are arranged on adjacent edges of the cover top wall 21; or, the number of cover side walls 22 can also be set to four, and the four cover side walls 22 are arranged on adjacent edges of the cover top wall 21.

[0066] Furthermore, if Fig.12 and Fig.13 As shown, Fig.12 1 is a schematic cross-sectional view of a battery housing 100 in another embodiment of the present invention. Fig.13 yes Fig.12Schematic diagram of the partially enlarged structure at the circled F in []. The structure of the metal cover 20 in this embodiment is substantially the same as that of the metal cover 20 in the above embodiment. The metal cover 20 in this embodiment further includes an extension 24. The extension 24 is connected to the edge of the cover side wall 22 away from the cover top wall 21. The extension 24 and the cover top wall 21 extend on the same side of the cover side wall 22. The cover side wall 22 abuts against the main bottom wall 13 through the extension 24. By providing that the metal cover 20 further includes the extension 24 in this embodiment, the contact area between the cover side wall 22 and the main bottom wall 13 can be increased, and the supporting force of the cover side wall 22 on the metal cover 20 can be further improved, so that the metal cover 20 can be more stably held on the metal main housing 10 for easy welding.

[0067] In this embodiment, the metal main housing 10 can be set as an integrally stamped structure, and the metal cover 20 can be set as an integrally stamped structure. By forming the metal main housing 10 and the metal cover 20 by stamping, the processing technology of the battery housing 100 can be simplified, the processing efficiency of the battery housing 100 can be improved, thereby saving production time and reducing processing costs.

[0068] Alternatively, optionally, the metal main housing 10 and the metal cover 20 can also be formed by injection molding or sheet metal bending and other methods.

[0069] Furthermore, in order to facilitate the stamping of the metal main housing 10 and the metal cover 20, the height of the metal main housing 10 in the height direction can be set to be less than the size of the metal main housing 10 in the horizontal direction, so as to shorten the depth of the accommodation cavity 11, facilitate the stamping and forming of the metal main housing 10 and the assembly of the core package.

[0070] Specifically, as Figure 8 shown, the height of the metal main housing 10 in the height direction is D, and the length of the metal main housing 10 in the horizontal direction is H. It can be set that D < H. Among them, the height of the metal main housing 10 in the Z-axis direction is D, and the length H of the metal main housing 10 in the horizontal direction refers to the smaller one of the length of the metal main housing 10 in the X-axis direction and the length of the metal main housing 10 in the Y-axis direction.

[0071] Another embodiment of the present utility model further provides a single cell 00, as Fig.14 shown, Fig.14 is the exploded structure diagram of the single cell 00 in another embodiment of the present utility model. The single cell 00 includes a core package 200 and the battery housing 100 described above. The core package 200 is assembled in the accommodation cavity 11 of the battery housing 100.

[0072] The assembly process of the single cell 00 in this embodiment will be described in detail below. Please refer to Fig.15 , Fig.15Schematic diagram of the manufacturing process of the single cell 00 in the embodiment of the utility model. The manufacturing process of the single cell 00 specifically includes the following steps:

[0073] Step S00: manufacturing the metal main shell 10.

[0074] Specific as Fig.16 and Fig.17 As shown, Fig.16 1 is a schematic diagram of the planar structure of the metal main shell 10 in the embodiment of the utility model. Fig.17 yes Fig.16 The schematic diagram of the cross-sectional structure of the metal main shell 10 at GG in FIG. The metal main shell 10 is formed by integral stamping, and has a main bottom wall 13 and four main side walls 14. The four main side walls 14 are connected to the periphery of the main bottom wall 13 to form a receiving cavity 11 and an opening 12 connected to the receiving cavity 11. The pole hole 15 and the liquid injection port 16 are opened on a main side wall 14 at the top, and the pole 30 is assembled in the pole hole 15.

[0075] Step S01: manufacturing a metal cover 20 and a core package 200 , placing the core package 200 in the accommodating cavity 11 , and welding the metal cover 20 , the core package 200 and the metal main shell 10 together.

[0076] Specific as Fig.18 and Fig.19 As shown, Fig.18 2 is a schematic diagram of the planar structure of the metal cover 20 in the embodiment of the utility model. Fig.19 It is a schematic cross-sectional view of the assembled core pack 200, metal cover 20 and metal main shell 10. The metal cover 20 is formed by integral stamping, and has a cover top wall 21 and two cover side walls 22, and the two cover side walls 22 are connected to the two opposite edges of the cover top wall 21. The core pack 200 is wound by a fully automatic winding machine and has a positive electrode and a negative electrode.

[0077] During assembly, the core pack 200 is first placed in the accommodating cavity 11, and one of the positive or negative electrodes of the core pack 200 is welded to the pole 30 through a welding head, and then the other of the positive or negative electrodes of the core pack 200 is welded to the metal main shell 10. Then, the metal cover 20 is pressed into the metal main shell 10 until the two cover side walls 22 of the metal cover 20 contact the main bottom wall 13, the cover side walls 22 are positioned, and the metal cover 20 is welded to the metal main shell 10 through a welding head. Since the welding position is located in the same plane, there is no need to use a welding fixture to flip the metal main shell 10, the production is very simple, the production efficiency is very high, and the defective rate is very low.

[0078] Step S02: injecting liquid into the containing cavity 11 through the liquid injection port 16, driving a sealing nail in the liquid injection port 16 to seal the liquid injection port 16, and then forming, dividing the volume, and taking the core package off the line.

[0079] Compared with the prior art, the embodiment of the utility model sets the battery housing 100 as a metal main shell 10 and a metal cover 20 separated from each other. When the metal main shell 10 and the metal cover 20 are connected, a part of the metal cover 20 is first inserted into the accommodating cavity 11, so that the part of the metal cover 20 abuts against the bottom of the accommodating cavity 11 for positioning, and then the metal cover 20 and the metal main shell 10 are welded by a welding head. Since the welding positions of the metal cover 20 and the metal main shell 10 are on the same plane, the welding fixture does not need to flip the metal main shell 10 during the welding process, thereby reducing the process complexity of the battery housing 100, and thus can reduce the defective rate of the single battery 00.

[0080] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery housing, characterized in that: include: The metal main shell is provided with a receiving cavity for receiving the core package and an opening communicating with the receiving cavity; as well as The metal cover is inserted into the accommodating cavity through the opening and abuts against the bottom of the accommodating cavity to close the opening. The metal main shell and the metal cover are welded and connected at the opening.

2. The battery housing according to claim 1, characterized in that: The metal main shell comprises a main bottom wall and a plurality of main side walls, the plurality of main side walls and the main bottom wall are connected and jointly surround the accommodating cavity, and the plurality of main side walls surround the opening; The metal cover body includes a cover top wall and multiple cover side walls, the multiple cover side walls are connected to the edges of the cover top wall, the cover top wall covers the opening, the side surfaces of the cover side walls are fitted with the main side walls, and the bottom of at least one of the multiple cover side walls is abutted against the main bottom wall.

3. The battery housing according to claim 2, characterized in that: The number of the cover side walls is two, and the two cover side walls are arranged on two opposite edges of the cover top wall; or, the number of the cover side walls is three, and the three cover side walls are arranged on adjacent edges of the cover top wall; or, the number of the cover side walls is four, and the four cover side walls are arranged on adjacent edges of the cover top wall.

4. The battery casing according to claim 2, characterized in that: The metal main shell is provided with a pole hole, and the pole hole is used to assemble the pole. The opening and the pole hole are respectively arranged on two adjacent sides of the metal main shell.

5. The battery casing according to claim 4, characterized in that: The metal main shell has a horizontal direction and a height direction perpendicular to each other. The metal main shell is provided with the opening in the height direction. The metal main shell is provided with the pole hole in the horizontal direction. The height of the metal main shell in the height direction is D. The length of the metal main shell in the horizontal direction is H, and D <H。 6. The battery case according to claim 4, characterized in that: The multiple cover side walls include a first cover side wall and a second cover side wall, the first cover side wall and the second cover side wall are arranged on opposite sides of the cover top wall, the opposite sides of the first cover side wall and the second cover side wall are respectively fitted with the corresponding main side walls, the bottoms of the first cover side wall and the second cover side wall are abutted with the main bottom wall, and the pole hole is arranged on the main side wall that is not fitted with the first cover side wall and the second cover side wall.

7. The battery housing according to claim 4, characterized in that: The multiple cover side walls include a first cover side wall and a second cover side wall, the first cover side wall and the second cover side wall are arranged on opposite sides of the cover top wall, the opposite sides of the first cover side wall and the second cover side wall are respectively fitted with the corresponding main side walls, the bottom of the first cover side wall is abutted against the main bottom wall, the bottom of the second cover side wall is separated from the main bottom wall to form an avoidance space, and the pole hole is arranged in the avoidance space.

8. The battery housing according to claim 2, characterized in that; The metal cover body further comprises an extension portion, the extension portion is connected to the edge of the cover side wall away from the cover top wall, the extension portion and the cover top wall extend on the same side of the cover side wall, and the cover side wall abuts against the main bottom wall through the extension portion.

9. The battery casing according to any one of claims 1 to 8, characterized in that: The metal main shell is an integral stamping structure, and the metal cover is an integral stamping structure.

10. A single cell battery, characterized in that: The single battery comprises: a core pack and a battery case according to any one of claims 1 to 9, wherein the core pack is disposed in the battery case.

Images