Cylindrical battery and battery module

Abstract

The utility model discloses a cylindrical battery and a battery module, and relates to the technical field of new energy. The cylindrical battery comprises a battery shell, a battery cell body, an anode top cover assembly and a cathode top cover, the anode top cover assembly comprises an anode top cover, an anode column and an insulating part, a containing cavity is formed in the battery shell, the battery cell body is contained in the containing cavity, and the cathode top cover assembly comprises a cathode top cover, an anode column and an insulating part. A containing cavity is formed in the battery shell, a first opening and a second opening which are communicated with the containing cavity are formed in the two opposite ends of the battery shell respectively, the positive pole top cover covers the first opening, the positive pole column is welded to a positive lug of the battery cell body, the insulating part is clamped between the positive pole top cover and the battery cell body, and the insulating part is clamped between the positive pole top cover and the battery cell body. The negative electrode top cover covers the second opening and is welded with the negative electrode lug of the battery cell body. According to the cylindrical battery and the battery module, a brand-new cylindrical battery assembly structure is provided, a collector plate structural part is omitted, and the production and manufacturing cost of the battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and more specifically, to a cylindrical battery and a battery module. Background Art

[0002] A cylindrical battery includes a cylindrical battery housing and an electric core accommodated in the cylindrical battery housing. Among them, the cylindrical battery housing includes a housing in a cylindrical structure and a top cover in a disc structure. The housing has an opening at the top, and the top cover covers the opening at the top. An inner cavity is provided in the housing, and the electric core is arranged in the inner cavity. A pole hole for a pole post to pass through is provided on the top cover, and the electric core is electrically connected to the outside through the pole post.

[0003] The assembly of the battery, as a key process in battery manufacturing, has a significant impact on the reliability of the battery. In the prior art, during the process of assembling and connecting the top cover and the housing, generally, the battery tab is first welded to the current collector plate, then the current collector plate is welded to the housing, and finally the top cover is welded to the housing. Due to the addition of the current collector plate structure, the production and manufacturing cost of the battery is relatively high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cylindrical battery and a battery module, and propose a new cylindrical battery assembly structure, which omits the current collector plate structure and reduces the production and manufacturing cost of the battery.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In the first aspect of the embodiments of the utility model, a cylindrical battery is provided, which includes a battery housing, an electric core body, a positive top cover assembly and a negative top cover. The positive top cover assembly includes a positive top cover, a positive pole post and an insulating member. An accommodation cavity is provided in the battery housing, and the electric core body is accommodated in the accommodation cavity. A first opening and a second opening communicating with the accommodation cavity are respectively provided at opposite ends of the battery housing. The positive top cover covers the first opening, the positive pole post is welded to the positive tab of the electric core body, the insulating member is clamped between the positive top cover and the electric core body, the negative top cover covers the second opening, and the negative top cover is welded to the negative tab of the electric core body. This cylindrical battery proposes a new cylindrical battery assembly structure, which omits the current collector plate structure and reduces the production and manufacturing cost of the battery.

[0007] As an implementable manner, the top and bottom of the positive electrode post respectively extend outward to form a top ring and a bottom ring. The top ring and the bottom ring are arranged at intervals to form a sealing cavity therebetween. The positive electrode top cover and the insulating member are both in an annular structure. The bottom of the positive electrode top cover and the top of the insulating member respectively extend inward to form an upper ring and a lower ring. The upper ring and the lower ring both extend into the sealing cavity, and the top ring, the upper ring, the lower ring and the bottom ring are abutted in sequence.

[0008] As an implementable manner, the top surface of the positive electrode post, the top surface of the top ring and the top surface of the positive electrode top cover are respectively flush with each other. The bottom surface of the positive electrode post, the bottom surface of the bottom ring and the bottom surface of the insulating member are respectively flush with each other.

[0009] As an implementable manner, a material-removing groove is formed by the top of the positive electrode post recessing inward. The bottom of the material-removing groove is welded and fixed to the positive electrode tab of the battery cell body, so that the positive electrode post is welded and fixed to the positive electrode tab of the battery cell body.

[0010] As an implementable manner, a liquid injection hole is formed through the bottom of the material-removing groove, and the liquid injection hole is communicated with the inside of the battery cell body.

[0011] As an implementable manner, a first positioning portion is arranged on the first opening, and a second positioning portion is arranged on the positive electrode top cover. The first positioning portion and the second positioning portion are installed in a positioning manner, so that the positive electrode top cover covers the first opening.

[0012] As an implementable manner, the first positioning portion is a protrusion, and the second positioning portion is a groove corresponding to the protrusion; or, the first positioning portion is a groove, and the second positioning portion is a protrusion corresponding to the groove.

[0013] As an implementable manner, an elastic member is further included, and the elastic member is clamped between the negative electrode top cover and the battery cell body.

[0014] As an implementable manner, the elastic member is a spring or a corrugated spring piece. When the elastic member is a spring, the number of the springs is multiple, and the multiple springs are arranged at intervals and evenly along the circumferential direction of the battery cell body.

[0015] In the second aspect of the embodiments of the present invention, a battery module is provided, including the above cylindrical battery. The cylindrical battery proposes a brand-new cylindrical battery assembly structure, omitting the current collecting plate structural member and reducing the production and manufacturing cost of the battery.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The cylindrical battery includes a battery housing, a battery cell body, a positive top cover assembly, and a negative top cover. The positive top cover assembly includes a positive top cover, a positive terminal, and an insulating member. A receiving cavity is provided inside the battery housing, and the battery cell body is accommodated in the receiving cavity. A first opening and a second opening communicating with the receiving cavity are respectively provided at opposite ends of the battery housing. The positive top cover covers the first opening, the positive terminal is welded to the positive tab of the battery cell body, the insulating member is clamped between the positive top cover and the battery cell body, the negative top cover covers the second opening, and the negative top cover is welded to the negative tab of the battery cell body. During the actual assembly process, the negative top cover can be first covered on the second opening to close one end of the battery housing where the second opening is located. Then, the battery cell body is placed into the receiving cavity through the first opening in a manner that the positive tab is on top and the negative tab is at the bottom. Subsequently, the positive top cover assembly formed by the positive top cover, the positive terminal, and the insulating member as a whole is assembled on the first opening in a manner that the positive top cover is on top and the insulating member is at the bottom, so that the positive top cover covers the first opening and the insulating member is clamped between the positive top cover and the battery cell body. Finally, the positive terminal is welded to the positive tab of the battery cell body and the negative top cover is welded to the negative tab of the battery cell body respectively, and the cylindrical battery product can be formed. The cylindrical battery provided by this application proposes a brand-new cylindrical battery assembly structure. By covering the positive top cover on the first opening, welding the positive terminal to the positive tab of the battery cell body, clamping the insulating member between the positive top cover and the battery cell body, covering the negative top cover on the second opening, and welding the negative top cover to the negative tab of the battery cell body, not only the current collector plate structural member is omitted, reducing the production and manufacturing cost of the battery, but also the welding difficulty is reduced through the laser penetration welding process, improving the welding efficiency and welding effect, thereby improving the production yield and use safety of the cylindrical battery product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is one of the schematic structural diagrams of the cylindrical battery provided by the embodiment of the present invention;

[0020] Figure 2 is the other schematic structural diagram of the cylindrical battery provided by the embodiment of the present invention;

[0021] Figure 3 is Figure 2 the partial enlarged view of part A in

[0022] Figure 4 is Figure 2Partial enlarged view at B in the [Chinese context];

[0023] Figure 5 Structural schematic diagram of the positive electrode top cover assembly provided by the embodiment of the present utility model;

[0024] Figure 6 Structural schematic diagram of the negative electrode top cover provided by the embodiment of the present utility model.

[0025] Icons: 100 - cylindrical battery; 10 - battery housing; 11 - first positioning part; 20 - battery cell body; 30 - positive electrode top cover assembly; 31 - positive electrode top cover; 311 - upper ring; 312 - second positioning part; 32 - positive electrode post; 321 - top ring; 322 - bottom ring; 323 - material removal groove; 324 - liquid injection hole; 325 - first welding position; 33 - insulating part; 331 - lower ring; 40 - negative electrode top cover; 41 - second welding position; 50 - elastic part. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0028] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Please refer to Figures 1 to 6 , the embodiment of the present application provides a cylindrical battery 100, which includes a battery housing 10, a battery core body 20, a positive electrode top cover assembly 30, and a negative electrode top cover 40. The positive electrode top cover assembly 30 includes a positive electrode top cover 31, a positive electrode post 32, and an insulating member 33. A receiving cavity is provided in the battery housing 10, and the battery core body 20 is accommodated in the receiving cavity. A first opening and a second opening communicating with the receiving cavity are respectively provided at opposite ends of the battery housing 10. The positive electrode top cover 31 covers the first opening, the positive electrode post 32 is welded to the positive electrode tab of the battery core body 20, the insulating member 33 is clamped between the positive electrode top cover 31 and the battery core body 20, the negative electrode top cover 40 covers the second opening, and the negative electrode top cover 40 is welded to the negative electrode tab of the battery core body 20. This cylindrical battery 100 proposes a brand-new assembly structure for the cylindrical battery 100, eliminating the current collector plate structural member and reducing the production and manufacturing cost of the battery.

[0033] It should be noted that, as Figures 1 to 4As shown in the figure, the cylindrical battery 100 includes a battery housing 10, a battery cell body 20, a positive top cover assembly 30, and a negative top cover 40. Among them, a receiving cavity is provided inside the battery housing 10 so that the battery cell body 20 can be accommodated in the receiving cavity. In addition, a first opening and a second opening are respectively provided at opposite ends of the battery housing 10, and both the first opening and the second opening communicate with the receiving cavity, so that the battery cell body 20 can be accommodated in the receiving cavity via the first opening or the second opening.

[0034] Briefly speaking, the battery housing 10 has a cylindrical structure with openings at both ends. In order to seal the battery housing 10, the cylindrical battery 100 further includes a positive top cover assembly 30 and a negative top cover 40. Among them, the positive top cover assembly 30 includes a positive top cover 31, a positive terminal 32, and an insulating member 33. The positive top cover 31 covers the first opening, the positive terminal 32 is welded to the positive tab of the battery cell body 20, and the insulating member 33 is clamped between the positive top cover 31 and the battery cell body 20. The negative top cover 40 covers the second opening, and the negative top cover 40 is welded to the negative tab of the battery cell body 20.

[0035] During the actual assembly process, the negative top cover 40 can be first covered on the second opening to close the end of the battery housing 10 where the second opening is located. Then, the battery cell body 20 can be accommodated in the receiving cavity via the first opening with the positive tab on top and the negative tab on the bottom. Subsequently, the positive top cover assembly 30 formed by the positive top cover 31, the positive terminal 32, and the insulating member 33 as a whole can be assembled on the first opening with the positive top cover 31 on top and the insulating member 33 on the bottom, so that the positive top cover 31 covers the first opening and the insulating member 33 is clamped between the positive top cover 31 and the battery cell body 20. Finally, the positive terminal 32 is welded to the positive tab of the battery cell body 20, and the negative top cover 40 is welded to the negative tab of the battery cell body 20 respectively, and the cylindrical battery 100 product can be formed.

[0036] Exemplarily, as Figure 5 shown, when the positive terminal 32 is welded to the positive tab of the battery cell body 20, welding can be performed at the first welding position 325 to ensure stable and reliable electrical connection between the positive terminal 32 and the positive tab of the battery cell body 20; as Figure 6 shown, when the negative top cover 40 is welded to the negative tab of the battery cell body 20, welding can be performed at the second welding position 41 to ensure stable and reliable electrical connection between the negative top cover 40 and the negative tab of the battery cell body 20. Exemplarily, laser penetration welding technology can be selected during welding, which can not only avoid generating welding slag inside the battery housing 10, reduce the short-circuit risk of the cylindrical battery 100, but also reduce the welding difficulty, improve the welding efficiency, and thus improve the yield of the formed cylindrical battery 100 product.

[0037] The cylindrical battery 100 provided by the present application proposes a brand-new assembly structure for the cylindrical battery 100. The positive electrode top cover 31 covers the first opening, the positive electrode post 32 is welded to the positive electrode tab of the battery cell body 20, the insulating member 33 is clamped between the positive electrode top cover 31 and the battery cell body 20, the negative electrode top cover 40 covers the second opening, and the negative electrode top cover 40 is welded to the negative electrode tab of the battery cell body 20. This not only eliminates the current collector plate structural member, reduces the production and manufacturing cost of the battery, but also reduces the welding difficulty, improves the welding efficiency and welding effect through the laser penetration welding process, thereby improving the production yield and use safety of the cylindrical battery 100 product.

[0038] As Figure 3 shown, as an implementable embodiment, the top and bottom of the positive electrode post 32 respectively extend outwardly to form a top ring 321 and a bottom ring 322. The top ring 321 and the bottom ring 322 are spaced apart to form a sealed cavity therebetween. The positive electrode top cover 31 and the insulating member 33 are both in a circular ring structure. The bottom of the positive electrode top cover 31 and the top of the insulating member 33 respectively extend inwardly to form an upper ring 311 and a lower ring 331. The upper ring 311 and the lower ring 331 both extend into the sealed cavity, and the top ring 321, the upper ring 311, the lower ring 331, and the bottom ring 322 are sequentially abutted. Exemplarily, the insulating member 33 can be made of a plastic material with a certain elasticity, so that the insulating member 33 has an insulating and sealing function.

[0039] Briefly speaking, the cross-sectional shape of the positive electrode post 32 is in an I-shaped structure. The top ring 321 is the upper bottom edge of the I-shaped structure, and the bottom ring 322 is the lower bottom edge of the I-shaped structure to form a sealed cavity between the top ring 321 and the bottom ring 322. On this basis, the bottom of the positive electrode top cover 31 and the top of the insulating member 33 respectively extend inwardly to form an upper ring 311 and a lower ring 331. When assembling the positive electrode top cover 31, the positive electrode post 32, and the insulating member 33, the upper ring 311 and the lower ring 331 are both extended into the sealed cavity, so that the positive electrode top cover 31, the positive electrode post 32, and the insulating member 33 have the following positional relationship, that is, the top ring 321, the upper ring 311, the lower ring 331, and the bottom ring 322 are sequentially abutted, so that the insulating member 33 can play an insulating role between the positive electrode top cover 31 and the battery cell body 20, and at the same time, it can ensure the sealed connection between the positive electrode top cover 31 and the positive electrode post 32, improving the sealing performance of the cylindrical battery 100.

[0040] As Figure 3As shown, as an implementable embodiment, the top surface of the positive electrode post 32, the top surface of the top ring 321, and the top surface of the positive electrode top cover 31 are respectively flush with each other, and the bottom surface of the positive electrode post 32, the bottom surface of the bottom ring 322, and the bottom surface of the insulating member 33 are respectively flush with each other, so as to improve the appearance integrity of the cylindrical battery 100, thereby facilitating the assembly of multiple cylindrical batteries 100 into a battery module in the box of the battery pack and improving the volume energy density of the battery pack.

[0041] As Figure 3 shown, as an implementable embodiment, the top of the positive electrode post 32 is recessed inwardly to form a material-removing groove 323, so as to reduce the thickness of the positive electrode post 32 in this area through the material-removing groove 323, thereby facilitating the welding and fixing of the positive electrode lug of the cell body 20 to the bottom of the material-removing groove 323, so that the positive electrode post 32 is welded and fixed to the positive electrode lug of the cell body 20. Similarly, as Figure 4 shown, the negative electrode top cover 40 is recessed inwardly to form a thinning groove, so as to reduce the thickness of the negative electrode top cover 40 in this area through the thinning groove, thereby facilitating the welding and fixing of the negative electrode lug of the cell body 20 to the bottom of the thinning groove, so that the negative electrode top cover 40 is welded and fixed to the negative electrode lug of the cell body 20.

[0042] As Figure 2 、 Figure 3 and Figure 5 shown, as an implementable embodiment, a liquid injection hole 324 is provided through the bottom of the material-removing groove 323, and the liquid injection hole 324 is communicated with the inside of the cell body 20, so as to facilitate the injection of electrolyte into the cell body 20 through the liquid injection hole 324, so that the cell body 20 can perform the charge and discharge process.

[0043] As Figure 3 shown, as an implementable embodiment, a first positioning portion 11 is provided on the first opening, and a second positioning portion 312 is provided on the positive electrode top cover 31. The first positioning portion 11 and the second positioning portion 312 are positioned and installed so that the positive electrode top cover 31 covers the first opening, so as to improve the simplicity of assembling the positive electrode top cover 31 and the battery housing 10 through the docking structure formed by the first positioning portion 11 and the second positioning portion 312 together. As an implementable embodiment, the first positioning portion 11 is a protrusion, and the second positioning portion 312 is a groove corresponding to the protrusion; or, the first positioning portion 11 is a groove, and the second positioning portion 312 is a protrusion corresponding to the groove.

[0044] Similarly, as Figure 4As shown in the figure, a third positioning portion is provided on the second opening, and a fourth positioning portion is provided on the negative electrode top cover 40. The third positioning portion and the fourth positioning portion are positioned and installed so that the negative electrode top cover 40 covers the second opening, and the docking structure formed by the third positioning portion and the fourth positioning portion together is used to improve the simplicity of the assembly of the negative electrode top cover 40 and the battery case 10. As an implementable manner, the third positioning portion is a protrusion, and the fourth positioning portion is a groove corresponding to the protrusion; alternatively, the third positioning portion is a groove, and the fourth positioning portion is a protrusion corresponding to the groove.

[0045] It should be noted that whether it is the first positioning portion 11 and the second positioning portion 312, or the third positioning portion and the fourth positioning portion, after the two are positioned and installed, laser welding technology needs to be used at the connection to improve the stability and reliability of the connection, so as to prevent the positive electrode top cover 31 or the negative electrode top cover 40 from falling off.

[0046] As Figure 1 and Figure 4 shown in the figure, as an implementable manner, the cylindrical battery 100 further includes an elastic member 50. The elastic member 50 is clamped between the negative electrode top cover 40 and the battery cell body 20 to improve the buffering for the vibration of the cylindrical battery 100 through the elastic member 50, so as to prevent the negative electrode top cover 40 from falling off from the second opening.

[0047] As an implementable manner, the elastic member 50 is a spring or a corrugated spring piece. When the elastic member 50 is a spring, the number of springs is multiple, and the multiple springs are arranged at intervals and evenly along the circumferential direction of the battery cell body 20. In order to reduce the installation difficulty of the springs, the multiple springs can be fixed on a ring structure member at the same time. However, this may increase the production cost of the battery and the height of the cylindrical battery 100. Therefore, preferably, in this embodiment, the elastic member 50 is a corrugated spring piece.

[0048] The embodiment of the present application further provides a battery module, including the above-mentioned cylindrical battery 100. Since the structure and beneficial effects of the cylindrical battery 100 have been described in detail in the foregoing embodiments, they will not be elaborated herein.

[0049] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cylindrical battery, characterized in that: It includes a battery case, a battery cell body, a positive top cover assembly and a negative top cover, the positive top cover assembly includes a positive top cover, a positive pole column and an insulating member, a accommodating cavity is provided in the battery case, the battery cell body is accommodated in the accommodating cavity, the opposite ends of the battery case are respectively provided with a first opening and a second opening connected to the accommodating cavity, the positive top cover is covered with the first opening, the positive pole column is welded to the positive pole ear of the battery cell body, the insulating member is clamped between the positive top cover and the battery cell body, the negative top cover is covered with the second opening, and the negative top cover is welded to the negative pole ear of the battery cell body.

2. The cylindrical battery according to claim 1, characterized in that: The top and bottom of the positive electrode column extend outward to form a top ring and a bottom ring respectively, and the top ring and the bottom ring are spaced apart to form a sealed cavity between the top ring and the bottom ring. The positive electrode top cover and the insulating member are both circular ring structures, and the bottom of the positive electrode top cover and the top of the insulating member extend inward to form an upper ring and a lower ring respectively, and the upper ring and the lower ring both extend into the sealed cavity, and the top ring, the upper ring, the lower ring and the bottom ring are abutted in sequence.

3. The cylindrical battery according to claim 2, characterized in that: The top surface of the positive electrode column, the top surface of the top ring and the top surface of the positive electrode top cover are flush with each other, and the bottom surface of the positive electrode column, the bottom surface of the bottom ring and the bottom surface of the insulating member are flush with each other.

4. The cylindrical battery according to claim 2, characterized in that: The top of the positive electrode column is recessed inwardly to form a material reduction groove, and the bottom of the material reduction groove is welded and fixed to the positive electrode tab of the battery body, so that the positive electrode column is welded and fixed to the positive electrode tab of the battery body.

5. The cylindrical battery according to claim 4, characterized in that: A liquid injection hole is provided through the bottom of the material reduction groove, and the liquid injection hole is communicated with the interior of the battery cell body.

6. The cylindrical battery according to claim 1, characterized in that: The first opening is provided with a first positioning portion, the positive electrode top cover is provided with a second positioning portion, and the first positioning portion and the second positioning portion are positioned and installed so that the positive electrode top cover covers the first opening.

7. The cylindrical battery according to claim 6, characterized in that: The first positioning portion is a protrusion, and the second positioning portion is a groove corresponding to the protrusion; or, the first positioning portion is a groove, and the second positioning portion is a protrusion corresponding to the groove.

8. The cylindrical battery according to claim 1, characterized in that: It also includes an elastic member, which is clamped between the negative electrode top cover and the battery cell body.

9. The cylindrical battery according to claim 8, characterized in that: The elastic member is a spring or a corrugated spring sheet. When the elastic member is a spring, there are multiple springs, and the multiple springs are spaced and evenly arranged along the circumference of the battery cell body.

10. A battery module, characterized in that: A cylindrical battery comprising any one of claims 1 to 9.

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