Anti-bulging battery shell

Abstract

The utility model relates to and discloses an anti-swelling battery shell. Relates to the technical field of new energy batteries. The shell comprises a first shell body and a second shell body, and the first shell body and the second shell body are spliced with each other; a first cavity with an opening in one end is formed in the first shell, a second cavity with an opening in one end is formed in the second shell, the first cavity and the second cavity are spliced to form a containing cavity used for containing a battery cell, and a positive pole column used for leading out a positive pole of the battery cell and a negative pole column used for leading out a negative pole of the battery cell are arranged on the first shell; the first shell and the second shell are movably connected and used for adjusting the width of the containing cavity. According to the utility model, the first shell and the second shell are movably connected, and when the battery core bag positioned in the accommodating cavity expands, the first shell and the second shell are pushed to be far away from each other, so that the width of the accommodating cavity is increased to counteract the displacement generated by the expansion of the battery core bag, thereby preventing the swelling condition of the battery shell and ensuring the use performance of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to an anti-swelling battery shell. Background Art

[0002] Conventional battery cells are made by rolling and coating the positive and negative electrodes into finished electrodes, and then the positive and negative electrodes and the isolation film are wound by winding equipment to form a battery core package. Since the formed battery core package has poor structural strength, it is necessary to use a battery shell to load the battery core package during the battery manufacturing process to protect the battery core package. After the battery core package is loaded in the battery shell, one end of the battery adapter is welded to the battery ear and the other end is welded to the battery shell column by laser welding, so that the battery adapter connects the battery ear with the battery shell column, thereby completing the battery production. The existing battery shell used to load batteries does not have sufficient structural strength due to the large surface, and cannot effectively offset the displacement caused by the expansion of the battery cell. Therefore, conventional battery shells are prone to swell, affecting the use of the battery.

[0003] Announcement No. CN219226449U, Publication Date 2023-06-20 discloses a square shell battery cell, the square shell battery cell includes a top cover assembly, a bare battery cell and a shell, the bare battery cell is connected to the top cover assembly, the shell cover is arranged on the bare battery cell and connected to the top cover assembly, the bare battery cell includes a first bare battery cell group and a second bare battery cell group stacked together, the second bare battery cell group is sandwiched in the middle of the first bare battery cell group, the pole ears of the first bare battery cell group and the pole ears of the second bare battery cell group are staggered along the length direction of the top cover assembly, and the pole ears of the first bare battery cell group and the pole ears of the second bare battery cell group are on the same plane. The shell of the battery cell cannot effectively offset the displacement caused by the expansion of the bare battery cell, so the shell is prone to bulging, affecting the use of the battery cell. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-swelling battery shell to address the deficiencies of the above-mentioned prior art, which can effectively offset the displacement caused by the expansion of the battery cell and prevent the battery shell from swelling, thereby ensuring the performance of the battery.

[0005] The utility model proposes an anti-bulging battery shell, comprising a first shell and a second shell, the first shell and the second shell are spliced ​​with each other; a first cavity with an opening at one end is provided in the first shell, and a second cavity with an opening at one end is provided in the second shell, the first cavity and the second cavity are spliced ​​together to form a accommodating cavity for accommodating a battery cell, the first shell is provided with a positive pole column for leading out the positive pole of the battery cell, and a negative pole column for leading out the negative pole of the battery cell; the first shell and the second shell are movably connected to adjust the width of the accommodating cavity.

[0006] Furthermore, the second shell is provided with a plug-in slot, and the first shell is provided with a plug-in portion plugged into the plug-in slot.

[0007] Furthermore, the first shell is provided with a first connecting column, the second shell is provided with a second connecting column, the plug-in portion includes a first plug rod provided on the first connecting column, the plug-in slot includes a first slot provided on the second connecting column, and the first plug rod is plugged into the first slot.

[0008] Furthermore, a sawtooth-shaped protrusion is provided on the outer periphery of the first insertion rod, and a sawtooth-shaped groove matching with the sawtooth-shaped protrusion is provided on the inner wall of the first insertion slot.

[0009] Furthermore, a plug portion is provided at the end of the first insertion rod, and a diameter of the plug portion gradually decreases in a direction away from the first connecting column. A plug opening is provided at the open end of the first slot, and a diameter of the plug opening gradually increases in a direction away from the second connecting column.

[0010] Furthermore, a third connecting column is provided on the first shell, a fourth connecting column is provided on the second shell, the plug-in portion also includes a second plug rod provided on the third connecting column, the plug-in slot also includes a second slot provided on the fourth connecting column, and the second plug rod is plugged into the second slot.

[0011] Furthermore, a wedge-shaped stopper is provided at the end of the second insertion rod, and a limiting opening is provided at the open end of the second slot. After the second insertion rod is inserted into the second slot, the limiting opening limits the wedge-shaped stopper.

[0012] Furthermore, a first reinforcing rib is provided on a side wall of the first cavity relative to the opening end, and a second reinforcing rib is provided on a side wall of the second cavity relative to the opening end.

[0013] Furthermore, the first reinforcing rib connects the first connecting column and the third connecting column, and the second reinforcing rib connects the second connecting column and the fourth connecting column.

[0014] Furthermore, a shielding plate is provided on the outer side of one end where the first shell and the second shell are spliced, and a shielding groove is provided on the outer side of one end where the second shell and the first shell are spliced, and the shielding plate cooperates with the shielding groove to shield the gap between the first shell and the second shell.

[0015] The utility model provides an anti-swelling battery shell with the following advantages:

[0016] (1) The first shell and the second shell of the battery shell are movably connected. When the battery core package in the accommodating cavity expands, the first shell and the second shell are pushed away from each other, so that the width of the accommodating cavity is increased to offset the displacement caused by the expansion of the battery core package, thereby preventing the battery shell from bulging and ensuring the performance of the battery;

[0017] (2) The first shell of the battery shell is provided with an inserting portion, and the second shell is provided with an inserting slot. The first shell and the second shell are spliced ​​by inserting the inserting portion into the inserting slot, so that the first cavity and the second cavity are spliced ​​together to form a receiving cavity to accommodate the battery core pack;

[0018] (3) The outer periphery of the first plug rod of the battery shell is provided with a serrated protrusion, and the inner wall of the first slot is provided with a serrated groove. When the first plug rod is inserted into the first slot, the serrated protrusion on the outer periphery of the first plug rod cooperates with the serrated groove inside the first slot, thereby further increasing the friction between the first plug rod and the first slot, preventing the first shell and the second shell from being easily separated after the battery shell is spliced, thereby enhancing the structural stability of the battery shell;

[0019] (4) A plug portion is provided at one end of the first insertion rod of the battery shell away from the first connecting column, and the diameter of the plug portion gradually decreases in the direction away from the first connecting column, and a plug opening is provided at the open end of the first slot, and the diameter of the plug opening gradually increases in the direction away from the second connecting column, so that the splicing operation of the first shell and the second shell is simpler and more convenient, and easy to implement, thereby enhancing the practicality of the battery shell;

[0020] (5) The end of the second insertion rod of the battery shell is provided with a wedge-shaped stopper, and the open end of the second slot is provided with a limiting opening. After the second insertion rod is inserted into the second slot, the limiting opening limits the wedge-shaped stopper, thereby preventing the first insertion rod from being disengaged from the first slot and the second insertion rod from being disengaged from the second slot, thereby causing the first shell to be disengaged from the second shell, affecting the use of the battery shell;

[0021] (6) The first reinforcing rib of the battery shell connects the first connecting column and the third connecting column, and the second reinforcing rib connects the second connecting column and the fourth connecting column, so that the force generated by the expansion of the battery core package is better transmitted to the first connecting column and the third connecting column through the first reinforcing rib, and the second reinforcing rib is better transmitted to the second connecting column and the fourth connecting column, thereby better enabling the first insertion rod to move out of the first slot and the second insertion rod to move out of the second slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0023] Figure 1 This is a schematic structural diagram of an anti-swelling battery case according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a first shell of an anti-swelling battery shell according to an embodiment of the utility model;

[0025] Figure 3 This is a schematic structural diagram of a second shell of an anti-swelling battery shell according to an embodiment of the utility model;

[0026] Figure 4 This is a schematic structural diagram of the cooperation between the first insertion rod and the first slot of an anti-swelling battery case according to an embodiment of the utility model;

[0027] Figure 5 The present invention is a schematic structural diagram of the cooperation between the second insertion rod and the second slot of an anti-swelling battery shell according to an embodiment of the present invention.

[0028] In the figure: 1. first shell; 11. positive pole; 12. negative pole; 13. first cavity; 14. first connecting pole; 141. first plug rod; 1411. serrated protrusion; 1412. plug-in portion; 15. third connecting pole; 151. second plug rod; 1511. wedge-shaped stopper; 16. first reinforcing rib; 17. shielding plate; 2. second shell; 21. second cavity; 22. second connecting pole; 221. first slot; 2211. serrated groove; 2212. plug-in opening; 23. fourth connecting pole; 231. second slot; 2311. limit opening; 24. second reinforcing rib; 25. shielding groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] The anti-bulging battery case of the utility model embodiment comprises a first shell 1 and a second shell 2, wherein the first shell 1 and the second shell 2 are spliced ​​with each other; a first cavity 13 with an opening at one end is provided in the first shell 1, and a second cavity 21 with an opening at one end is provided in the second shell 2, and the first cavity 13 and the second cavity 21 are spliced ​​together to form a receiving cavity for receiving a battery cell, and a positive electrode column 11 for leading out the positive electrode of the battery cell and a negative electrode column 12 for leading out the negative electrode of the battery cell are provided on the first shell 1; the first shell 1 and the second shell 2 are movably connected to adjust the width of the receiving cavity, see Figure 1 , Figure 2 and Figure 3 .

[0031] In the present application, the battery shell includes a first shell 1 and a second shell 2. A first cavity 13 with an opening at one end is provided in the first shell 1, and a second cavity 21 with an opening at one end is provided in the second shell 2. When the first shell 1 and the second shell 2 are spliced, the first cavity 13 and the second cavity 21 are spliced ​​together to form a accommodating cavity for accommodating the battery cell package.

[0032] A positive electrode column 11 and a negative electrode column 12 are arranged on the first shell 1. The battery cell adapter plate connects the positive electrode column 11 with the positive electrode ear of the battery cell core package and connects the negative electrode column 12 with the negative electrode of the battery cell core package by laser welding, so that the positive electrode of the battery cell core package is led out through the positive electrode column 11 on the first shell 1, and the negative electrode of the battery cell core package is led out through the negative electrode column 12. After splicing, the first shell 1 and the second shell 2 protect the battery core package to complete the production of the battery.

[0033] Since in the present application, the first shell 1 is movably connected to the second shell 2, when the battery core package located in the accommodating cavity expands, the first shell 1 and the second shell 2 are pushed away from each other, so that the width of the accommodating cavity is increased to offset the displacement caused by the expansion of the battery core package, thereby preventing the battery shell from swelling and ensuring the performance of the battery.

[0034] In this embodiment, a plug-in slot is provided on the second shell 2, and a plug-in portion plugged into the plug-in slot is provided on the first shell 1. In this application, a plug-in portion is provided on the first shell 1, and a plug-in slot is provided on the second shell 2. The plug-in portion is plugged into the plug-in slot to achieve splicing of the first shell 1 and the second shell 2, so that the first cavity 13 and the second cavity 21 are spliced ​​together to form a receiving cavity to accommodate the battery cell package.

[0035] It can be foreseen that the plug-in portion and the plug-in slot are interference fit, and under the action of external force, the plug-in portion can be plugged into the plug-in slot to complete the splicing of the first shell 1 and the second shell 2. After the first shell 1 and the second shell 2 are spliced, under the cooperation of the plug-in portion and the plug-in slot, the first shell 1 and the second shell 2 will not be easily separated, so that the first shell 1 and the second shell 2 protect the battery core package located in the accommodating cavity.

[0036] When the battery cell package in the accommodating cavity expands, the force generated by the expansion of the battery cell package acts on the inner walls of the first cavity 13 and the second cavity 21, pushing the plug-in part to move outward in the plug-in slot, thereby increasing the width of the accommodating cavity to offset the displacement caused by the expansion of the battery cell package.

[0037] In this embodiment, the first shell 1 is provided with a first connecting column 14, the second shell 2 is provided with a second connecting column 22, the plug-in portion includes a first plug-in rod 141 provided on the first connecting column 14, the plug-in slot includes a first slot 221 provided on the second connecting column 22, the first plug-in rod 141 is plugged into the first slot 221, see Figure 2 and Figure 3 In the present application, a first connection column 14 is disposed in the first cavity 13 of the first shell 1 , and the plug-in portion includes a first plug rod 141 . The first plug rod 141 is disposed on the first connection column 14 , and the first plug rod 141 extends out of the first cavity 13 .

[0038] A second connecting column 22 is provided in the second cavity 21 of the second shell 2, and the plug-in slot includes a first slot 221, and the first slot 221 is provided on the second connecting column 22. When the first shell 1 and the second shell 2 are spliced, under the action of external force, the first plug rod 141 extending outside the first cavity 13 is plugged into the first slot 221 located in the second cavity 21 until the first shell 1 and the second shell 2 abut against each other, thereby completing the splicing of the battery shell. Under the cooperation of the first plug rod 141 and the first slot 221, the first shell 1 and the second shell 2 will not be easily separated, so that the spliced ​​battery shell protects the battery cell package located in the accommodating cavity.

[0039] When the battery cell package in the accommodating cavity expands, the force generated by the expansion of the battery cell package acts on the inner walls of the first cavity 13 and the second cavity 21, pushing the first insertion rod 141 to move outward in the first slot 221, thereby increasing the width of the accommodating cavity to offset the displacement caused by the expansion of the battery cell package, thereby preventing the battery shell from swelling and ensuring the performance of the battery.

[0040] After the battery shells are spliced, the first shell 1 and the second shell 2 are in contact with each other, and when the battery core package in the accommodating cavity expands, the first shell 1 and the second shell 2 move away from each other, which will cause a gap in the middle of the battery shell. Dust or other debris in the external environment may enter the accommodating cavity through the gap, causing adverse effects on the use of the battery cell. Therefore, in the present application, a shielding plate 17 is provided on the outer side of the end where the first shell 1 and the second shell 2 are spliced, and a shielding groove 25 is provided on the outer side of the end where the second shell 2 and the first shell 1 are spliced. Figure 2 and Figure 3 .

[0041] When the first shell 1 and the second shell 2 are spliced, the baffle plate 17 on the outside of the first shell 1 is plugged into the baffle groove 25 on the outside of the second shell 2, so that the baffle plate 17 surrounds the periphery of the second shell 2; when the first shell 1 and the second shell 2 move away from each other, the baffle plate 17 follows the first shell 1 to move outward along the baffle groove 25, and closes the gap between the first shell 1 and the second shell 2, thereby preventing dust or other debris in the external environment from entering the accommodating cavity, further ensuring the performance of the battery.

[0042] In this embodiment, a sawtooth-shaped protrusion 1411 is provided on the outer periphery of the first insertion rod 141, and a sawtooth-shaped groove 2211 is provided on the inner wall of the first insertion slot 221 to cooperate with the sawtooth-shaped protrusion 1411. Figure 4 In the present application, a sawtooth-shaped protrusion 1411 is provided on the outer periphery of the first plug rod 141, and a sawtooth-shaped groove 2211 is provided on the inner wall of the first slot 221. When the first plug rod 141 is inserted into the first slot 221, the sawtooth-shaped protrusion 1411 on the outer periphery of the first plug rod 141 cooperates with the sawtooth-shaped groove 2211 inside the first slot 221, thereby increasing the friction between the first plug rod 141 and the first slot 221, preventing the first shell 1 and the second shell 2 from easily separating after the battery shell is spliced, thereby enhancing the structural stability of the present battery shell.

[0043] It can be foreseen that: in the present application, the serrated protrusion 1411 arranged on the outer periphery of the first insertion rod 141 can be made of a material with elastic deformation ability, such as a plastic material, so that through the elastic deformation ability of the serrated protrusion 1411 itself, the friction between the first insertion rod 141 and the first slot 221 can be guaranteed to a certain extent, and the operation of inserting the first insertion rod 141 into or withdrawing it from the first slot 221 can be easier to achieve.

[0044] In this embodiment, the end of the first plug rod 141 is provided with a plug portion 1412, the diameter of which gradually decreases in the direction away from the first connecting column 14, and the open end of the first slot 221 is provided with a plug opening 2212, the diameter of which gradually increases in the direction away from the second connecting column 22. Figure 4 In the present application, a plug portion 1412 is provided at one end of the first plug rod 141 away from the first connecting column 14, and the diameter of the plug portion 1412 gradually decreases in a direction away from the first connecting column 14. A plug opening 2212 is provided at the open end of the first slot 221, and the diameter of the plug opening 2212 gradually increases in a direction away from the second connecting column 22.

[0045] In actual production, the position of the first plug rod 141 on the first shell 1 is designed to correspond to the position of the first slot 221 on the second shell 2, but due to the existence of processing errors, the position of the first plug rod 141 may have a small deviation from the position of the first slot 221. In the present application, when the first plug rod 141 is plugged into the first slot 221, the plug portion 1412 located at the end of the first plug rod 141 first cooperates with the plug opening 2212 located at the open end of the first slot 221. Since the diameter of the plug portion 1412 gradually decreases in the direction away from the first connecting column 14, and the diameter of the plug opening 2212 gradually increases in the direction away from the second connecting column 22, even if the position of the first plug rod 141 has a small deviation from the position of the first slot 221, the plug portion 1412 can still be plugged into the first slot 221 through the plug opening 2212, thereby making the splicing operation of the first shell 1 and the second shell 2 simpler and more convenient, easy to implement, and enhancing the practicality of the battery shell.

[0046] In this embodiment, the first housing 1 is further provided with a third connecting column 15, the second housing 2 is further provided with a fourth connecting column 23, the plug-in portion further includes a second plug-in rod 151 provided on the third connecting column 15, the plug-in slot further includes a second slot 231 provided on the fourth connecting column 23, the second plug-in rod 151 is plugged into the second slot 231, see Figure 2 and Figure 3 In the present application, a third connecting column 15 is further disposed in the first cavity 13 of the first shell 1 , and the plug-in portion further includes a second plug rod 151 disposed on the third connecting column 15 , and the second plug rod 151 extends out of the second cavity 21 .

[0047] A fourth connecting column 23 is also provided in the second cavity 21 of the second shell 2, and the plug-in slot also includes a second slot 231, which is provided on the fourth connecting column 23. When the first shell 1 and the second shell 2 are spliced, the first plug rod 141 is plugged into the first slot 221, and the second plug rod 151 is plugged into the second slot 231, until the first shell 1 and the second shell 2 are abutted, thereby completing the splicing of the battery shell. Under the cooperation of the first plug rod 141 and the first slot 221, and the second plug rod 151 and the second slot 231, the first shell 1 and the second shell 2 will not be easily separated, so that the spliced ​​battery shell protects the battery cell package located in the accommodating cavity, further enhancing the structural stability of the battery shell.

[0048] When the battery core package in the accommodating cavity expands, the force generated by the expansion of the battery core package acts on the inner walls of the first cavity 13 and the second cavity 21, pushing the first insertion rod 141 to move outward in the first slot 221, and simultaneously pushing the second insertion rod 151 to move outward in the second slot 231, thereby increasing the width of the accommodating cavity to offset the displacement caused by the expansion of the battery core package, thereby preventing the battery shell from swelling and ensuring the performance of the battery.

[0049] In this embodiment, a wedge-shaped stopper 1511 is provided at the end of the second insertion rod 151, and a limiting opening 2311 is provided at the open end of the second slot 231. After the second insertion rod 151 is inserted into the second slot 231, the limiting opening 2311 limits the wedge-shaped stopper 1511. Figure 5 In the present application, a wedge-shaped stopper 1511 is provided at one end of the second plug rod 151 away from the third connecting column 15, and a limiting opening 2311 is provided at the open end of the second slot 231. When the first shell 1 and the second shell 2 are spliced, under the action of external force, the wedge-shaped stopper 1511 can pass through the limiting opening 2311 and continue to enter the first slot 221, so that the second plug rod 151 is plugged into the second slot 231.

[0050] When the battery cell core package located in the accommodating cavity expands, the force generated by the expansion of the battery cell core package acts on the inner walls of the first cavity 13 and the second cavity 21, pushing the first insertion rod 141 to move outward in the first slot 221, and at the same time pushing the second insertion rod 151 to move outward in the second slot 231, so that the width of the accommodating cavity is increased; when the wedge-shaped stopper 1511 at the end of the second insertion rod 151 moves outward in the second slot 231 for a distance, the limiting opening 2311 limits the wedge-shaped stopper 1511 at the open end of the second slot 231, preventing the first insertion rod 141 from detaching from the first slot 221, and the second insertion rod 151 from detaching from the second slot 231, thereby causing the first shell 1 to detach from the second shell 2, affecting the use of the battery shell.

[0051] It is foreseeable that in order to allow the wedge-shaped stopper 1511 to pass through the limiting opening 2311 and, after passing through the limiting opening 2311, the limiting opening 2311 can limit the wedge-shaped stopper 1511, in the present application, the wedge-shaped stopper 1511 can be made of a material with elastic deformation ability, such as a plastic material, and the diameter range of the wedge-shaped stopper 1511 is larger than the diameter range of the limiting opening 2311. Under the action of a large external force, the wedge-shaped stopper 1511 can pass through the limiting opening 2311 by deforming itself, and after passing through the limiting opening 2311, the wedge-shaped stopper 1511 returns to its original shape, and the limiting opening 2311 can limit the wedge-shaped stopper 1511 to prevent the second insertion rod 151 from easily detaching from the second slot 231.

[0052] Furthermore, the diameter of the wedge-shaped block 1511 gradually decreases in the direction away from the third connecting column 15, and the diameter of the limiting opening 2311 gradually increases in the direction away from the fourth connecting column 23, and the maximum diameter of the wedge-shaped block 1511 is greater than the minimum diameter of the limiting opening 2311, thereby making it easier to operate the wedge-shaped block 1511 through the limiting opening 2311, and when there is a small deviation between the position of the second insertion rod 151 and the position of the second slot 231, the wedge-shaped block 1511 can still be inserted into the second slot 231 through the limiting opening 2311, thereby enhancing the practicality of the battery shell.

[0053] In this embodiment, a first reinforcing rib 16 is provided on the side wall of the first cavity 13 opposite to the opening end, and a second reinforcing rib 24 is provided on the side wall of the second cavity 21 opposite to the opening end. Figure 2 and Figure 3 In the present application, a first reinforcing rib 16 is provided in the first cavity 13, and the first reinforcing rib 16 is provided on the side wall of the first cavity 13 relative to the opening end. A second reinforcing rib 24 is provided in the second cavity 21, and the second reinforcing rib 24 is provided on the side wall of the second cavity 21 relative to the opening end, so that the structural strength of the first shell 1 is enhanced by the first reinforcing rib 16, and the structural strength of the second shell 2 is enhanced by the second reinforcing rib 24, thereby enhancing the structural stability of the battery shell.

[0054] In this embodiment, the first reinforcing rib 16 connects the first connecting column 14 and the third connecting column 15, and the second reinforcing rib 24 connects the second connecting column 22 and the fourth connecting column 23. Figure 2 and Figure 3 It can be foreseen that: in actual implementation, a plurality of first connecting columns 14 and a plurality of third connecting columns 15 are provided in the first cavity 13 of the first shell 1, a plurality of second connecting columns 22 and a plurality of fourth connecting columns 23 are provided in the second cavity 21 of the second shell 2, the first reinforcing rib 16 connects the plurality of first connecting columns 14 and the plurality of third connecting columns 15, and the second reinforcing rib 24 connects the plurality of second connecting columns 22 and the plurality of fourth connecting columns 23, so that when the battery core package expands, the first reinforcing rib 16 better transmits the force of the battery core package expansion to the plurality of first connecting columns 14 and the plurality of third connecting columns 15, and the second reinforcing rib 24 better transmits the force of the battery core package expansion to the plurality of second connecting columns 22 and the plurality of fourth connecting columns 23, thereby better enabling the first plug 141 to move out of the first slot 221, and enabling the second plug 151 to move out of the second slot 231.

[0055] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An anti-swelling battery case, characterized in that: The invention comprises a first shell (1) and a second shell (2), wherein the first shell (1) and the second shell (2) are spliced ​​with each other; a first cavity (13) with an opening at one end is provided in the first shell (1), and a second cavity (21) with an opening at one end is provided in the second shell (2); the first cavity (13) and the second cavity (21) are spliced ​​together to form a receiving cavity for receiving a battery cell; a positive electrode column (11) for leading out the positive electrode of the battery cell and a negative electrode column (12) for leading out the negative electrode of the battery cell are provided on the first shell (1); the first shell (1) and the second shell (2) are movably connected to each other for adjusting the width of the receiving cavity; a plug-in slot is provided on the second shell (2), and a plug-in portion plugged into the plug-in slot is provided on the first shell (1); The first shell (1) is provided with a first connecting column (14), the second shell (2) is provided with a second connecting column (22), the plug-in portion comprises a first plug rod (141) provided on the first connecting column (14), the plug-in slot comprises a first slot (221) provided on the second connecting column (22), and the first plug rod (141) is plugged into the first slot (221); a shielding plate (17) is provided on the outer side of one end where the first shell (1) and the second shell (2) are spliced, and a shielding slot (25) is provided on the outer side where the second shell (2) and the first shell (1) are spliced, and the shielding plate (17) cooperates with the shielding slot (25) to shield the gap between the first shell (1) and the second shell (2).

2. The anti-swelling battery case as claimed in claim 1, characterized in that: A sawtooth-shaped protrusion (1411) is provided on the outer periphery of the first insertion rod (141), and a sawtooth-shaped groove (2211) matching the sawtooth-shaped protrusion (1411) is provided on the inner wall of the first insertion slot (221).

3. The anti-swelling battery case as claimed in claim 1, characterized in that: The end of the first insertion rod (141) is provided with a plug portion (1412), the diameter of which gradually decreases in a direction away from the first connecting column (14), and the open end of the first slot (221) is provided with a plug opening (2212), the diameter of which gradually increases in a direction away from the second connecting column (22).

4. The anti-swelling battery case as claimed in claim 1, characterized in that: The first shell (1) is also provided with a third connecting column (15), the second shell (2) is also provided with a fourth connecting column (23), the plug-in portion further includes a second plug rod (151) provided on the third connecting column (15), the plug-in slot further includes a second slot (231) provided on the fourth connecting column (23), and the second plug rod (151) is plugged into the second slot (231).

5. The anti-swelling battery case as claimed in claim 4, characterized in that: A wedge-shaped stopper (1511) is provided at the end of the second insertion rod (151), and a limiting opening (2311) is provided at the open end of the second slot (231); after the second insertion rod (151) is inserted into the second slot (231), the limiting opening (2311) limits the wedge-shaped stopper (1511).

6. The anti-swelling battery case as claimed in claim 4, characterized in that: A first reinforcing rib (16) is provided on the side wall of the first cavity (13) opposite to the opening end, and a second reinforcing rib (24) is provided on the side wall of the second cavity (21) opposite to the opening end.

7. An anti-swelling battery case as claimed in claim 6, characterized in that: The first reinforcing rib (16) connects the first connecting column (14) and the third connecting column (15), and the second reinforcing rib (24) connects the second connecting column (22) and the fourth connecting column (23).

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