Battery cell and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cell and a battery, and the battery cell comprises a battery cell body and an insulating part, the outer wall of the battery cell body is wrapped with an insulating part, the insulating part comprises a cylinder body part and a turning cover part, the cylinder body part wraps the outer wall and the bottom wall of the battery cell body, the cylinder body part is provided with an opening, the turning cover part is connected with any edge of the opening, and the turning cover part wraps the top wall of the battery cell body. By arranging the insulating part comprising the cylinder part and the turning cover part, the insulating part wraps the outer wall of the battery cell body in all directions, so that the battery cell body is insulated from the external environment, and potential safety hazards such as fire, even explosion and the like caused by short circuit are avoided. Compared with the prior art, an insulating film and a top patch in the prior art are combined into the insulating part with the integrated box type structure, so that the number of structural parts is reduced, the steps of the battery cell in the manufacturing process are reduced to a certain extent, the manufacturing time is saved, the manufacturing efficiency of the battery cell is greatly improved, and the manufacturing cost of the battery cell is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a kind of battery cell and battery. BACKGROUND

[0002] The power cell in the related art has positive / negative polarity: generally, the positive pole is positively charged, and the negative pole is negatively charged; Therefore, to ensure its safety during use, the positive pole, the shell and the negative pole need to be insulated, and the shell needs to be insulated from the external environment. Currently, the positive pole and the shell are generally insulated from the negative pole by plastic filling, and the shell is usually wrapped with an insulating film all around and a top patch is pasted on the top of the cell to insulate it from the external environment. However, the entire assembly process is complicated. For example, the insulating film of the corresponding area is first cut, then it is attached and folded multiple times at the bottom, large surface, side and top of the shell, and finally a top patch is pasted on the top. Such a complicated process not only reduces production efficiency, but also increases the number of parts, which hinders the reduction of manufacturing cost. SUMMARY

[0003] The utility model aims to provide a battery cell and battery, which can reduce the number of structural parts and to some extent reduce the manufacturing steps of the battery cell.

[0004] The embodiments of the utility model can be implemented as follows:

[0005] In a first aspect, the utility model provides a battery cell, comprising: a battery cell body;

[0006] An insulating part is wrapped around the outer wall of the battery cell body, the insulating part comprises a cylindrical part and a flip cover part, the cylindrical part wraps around the outer wall and the bottom wall of the battery cell body, the cylindrical part is provided with an opening, and the flip cover part is connected to any edge of the opening, and the flip cover part wraps around the top wall of the battery cell body.

[0007] In an optional embodiment, the insulating part is attached to wrap around the outer wall of the battery cell body, and an adhesive layer is provided between the outer wall of the battery cell body and the insulating part.

[0008] In an optional embodiment, a release film is provided between the adhesive layer and the outer wall of the battery cell body, and the release film is higher than the opening side of the cylindrical part;

[0009] Pulling the release film separates the release film from the adhesive layer, so that the adhesive layer is attached to the outer wall of the battery cell body.

[0010] In an optional embodiment, the release film is at least 5mm higher than the opening of the cylindrical part.

[0011] In an optional embodiment, the adhesive layer is arranged on the insulating member, and the release film is arranged between the barrel portion and the outer wall of the battery cell body.

[0012] In an optional embodiment, the barrel portion comprises a first body and a second body connected with each other, the first body is connected with the flip cover portion, and the second body is arranged on the opposite side of the first body from the flip cover portion, the first body wraps the outer wall of the battery cell body, and the second body wraps the bottom wall of the battery cell body.

[0013] The release film is arranged between the adhesive layer of the first body and the outer wall of the battery cell body.

[0014] In an optional embodiment, the battery cell body comprises a shell and an end cover connected with each other.

[0015] The height of the barrel portion is H barrel = H second body + H shell + H flip cover.

[0016] H barrel is the height of the barrel portion, H second body is the height of the second body, H shell is the height of the shell, and H flip cover is the height of the end cover.

[0017] In an optional embodiment, the insulating member further comprises a connecting portion connecting the flip cover portion and the barrel portion.

[0018] The connecting portion is arranged on at least one side edge of the flip cover portion, so that the flip cover portion is bonded to the barrel portion through the connecting portion, or the connecting portion is arranged on the barrel portion, and the connecting portion is arranged on at least one side edge of the opening, so that the barrel portion is bonded to the flip cover portion through the connecting portion.

[0019] In an optional embodiment, at least one avoiding groove is arranged on the flip cover portion, and the avoiding groove is used for avoiding the code, the pole and the explosion-proof valve arranged on the battery cell body.

[0020] In a second aspect, the utility model also provides a battery, comprising the battery cell of any one of the above.

[0021] The battery cell and the battery provided by the embodiments of the utility model have the following beneficial effects.

[0022] By insulating a component comprising a cylindrical body and a flip-top, the cylindrical body encloses the outer and bottom walls of the battery cell body, and the flip-top encloses the top wall of the battery cell body. This ensures that the insulating component comprehensively encloses the outer wall of the battery cell body, insulating it from the external environment to prevent short circuits that could lead to fires or even explosions. Compared to the existing technology where the insulating film and top patch are used to insulate the battery cell body separately, this application integrates the insulating film and top patch into a single, box-like insulating component. This not only reduces the number of structural components but also decreases the number of steps in the battery cell manufacturing process, saving manufacturing time and significantly improving manufacturing efficiency, thereby reducing manufacturing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the battery cell structure provided in this embodiment;

[0025] Figure 2 This is a cross-sectional view of the battery cell provided in this embodiment;

[0026] Figure 3 for Figure 2 A partial schematic diagram of A in the middle;

[0027] Figure 4 This is a schematic diagram of the first structure of the insulating component provided in this embodiment;

[0028] Figure 5 This is a schematic diagram of the second structure of the insulating component provided in this embodiment;

[0029] Figure 6 This is a schematic diagram of the third structure of the insulating component provided in this embodiment;

[0030] Figure 7 This is a schematic diagram of the structure of the insulating component with a connection portion provided in this embodiment.

[0031] Icon: 010 - battery cell; 100 - battery cell body; 110 - end cover; 120 - shell; 130 - bare battery cell; 140 - explosion-proof valve; 150 - positive pole; 160 - negative pole; 170 - code; 200 - insulating piece; 210 - barrel part; 211 - opening; 212 - first body; 213 - second body; 220 - flip part; 221 - avoiding groove; 230 - adhesive layer; 240 - release film; 250 - connecting part. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0034] It should be noted that: similar reference numbers and letters represent 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.

[0035] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0037] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0038] The overall structure, working principle and technical effects of the battery cell 010 and the battery provided by the present application will be described in detail below through embodiments and in conjunction with the drawings.

[0039] Please refer to Figure 1 The electric core 010 provided by the utility model is applied to a square lithium ion electric core 010.

[0040] The battery can be a battery pack or a single battery.

[0041] Please refer to Figure 1 The electric core 010 provided by the utility model comprises an electric core body 100 and an insulating part 200, the outer wall of the electric core body 100 is wrapped with the insulating part 200, the insulating part 200 comprises a barrel part 210 and a flip part 220, the barrel part 210 wraps the outer wall and the bottom wall of the electric core body 100, the barrel part 210 is provided with an opening 211, the flip part 220 is connected with any one side at the opening 211, and the flip part 220 wraps the top wall of the electric core body 100.

[0042] It can be understood that, by arranging the insulating part 200 comprising the barrel part 210 and the flip part 220, the barrel part 210 wraps the outer wall and the bottom wall of the electric core body 100, and the flip part 220 wraps the top wall of the electric core body 100, so that the insulating part 200 comprehensively wraps the outer wall of the electric core body 100, the electric core body 100 is insulated from the external environment to avoid short circuiting and causing fire, explosion and other safety hazards. Compared with the structure design that the insulating film and the top patch respectively insulate the electric core body 100 in the prior art, the insulating film and the top patch in the prior art are combined into the integrated box type structure insulating part 200 in the utility model, the number of structural parts is reduced, the manufacturing process of the electric core 010 is reduced to a certain extent, the manufacturing time is saved, the manufacturing efficiency of the electric core 010 is greatly improved, and the manufacturing cost of the electric core 010 is correspondingly reduced.

[0043] In the embodiment, the electric core 010 comprises the electric core body 100.

[0044] In the embodiment, please refer to Figures 1-3 The electric core body 100 comprises an end cover 110 and a shell 120 connected with each other, and a bare electric core 130 is arranged in the end cover 110 and the shell 120; the bare electric core 130 is provided with a positive electrode lug and a negative electrode lug; an anti-explosion valve 140, a pole and an encoding 170 are arranged on the end cover 110. The pole comprises a positive pole 150 and a negative pole 160 and a plastic part corresponding to the positive pole 150 and the negative pole 160, the positive pole 150 is connected with the positive electrode lug of the bare electric core 130, and the negative pole 160 is connected with the negative electrode lug of the bare electric core 130.

[0045] The electric core body 100 is a square lithium ion electric core 010, and the outer wall of the electric core body 100 comprises a top wall, a bottom wall and a peripheral side wall.

[0046] In the embodiment, the battery cell 010 comprises an insulation piece 200.

[0047] The insulation piece 200 is used to wrap the outer wall of the battery cell body 100 in all directions, so as to insulate the battery cell body 100 from the external environment, and avoid short circuiting to cause fire or even explosion and other safety hazards.

[0048] In the embodiment, please refer to Figure 4 and Figure 5 The insulation piece 200 comprises a barrel portion 210 and a flip portion 220. The barrel portion 210 wraps the outer wall and the bottom wall of the battery cell body 100. The barrel portion 210 is provided with an opening 211. The flip portion 220 is connected to any one side of the opening 211. The flip portion 220 wraps the top wall of the battery cell body 100.

[0049] It can be understood that the insulation piece 200 is cut and folded to form the connected barrel portion 210 and flip portion 220. One end of the barrel portion 210 of the insulation piece 200 is folded to form a rectangular opening 211. The flip portion 220 can be connected to any one side of the opening 211, and the specific side is not limited.

[0050] Optionally, the flip portion 220 is provided with at least one avoiding groove 221. The avoiding groove 221 is used to avoid the code 170 hole, the pole and the explosion-proof valve 140 provided on the battery cell body. The shape of the avoiding groove 221 is not limited in the application, and the avoiding groove 221 can be designed according to the shape of the code 170, the pole and the explosion-proof valve 140.

[0051] In the embodiment, please refer to Figure 4 and Figure 5 The flip portion 220 is provided with four avoiding grooves 221. The four avoiding grooves 221 are respectively used to avoid the code 170, the positive pole 150, the negative pole 160 and the explosion-proof valve 140 provided on the end cover 110. The avoiding groove 221 arranged opposite to the positive pole 150 is used to form a connection channel of the positive pole 150 and the external environment. The avoiding groove 221 arranged opposite to the negative pole 160 is used to form a connection channel of the negative pole 160 and the external environment. The avoiding groove 221 arranged opposite to the explosion-proof valve 140 is used to form an exhaust channel. When the internal pressure of the battery cell body 100 reaches a threshold value, the explosion-proof valve 140 is opened and releases pressure to the external environment through the exhaust channel formed by the avoiding groove 221.

[0052] Optionally, please refer to Figure 4 and Figure 5The barrel portion 210 comprises a first body 212 and a second body 213 connected with each other, the first body 212 is connected with the flip cover portion 220, and the second body 213 is arranged on the opposite side of the first body 212 respectively, the first body 212 wraps the outer wall of the battery cell body 100, and the second body 213 wraps the bottom wall of the battery cell body 100.

[0053] In the embodiment, the height of the barrel portion 210 is H 筒体 = H 第二本体213 + H 壳体120 + H 翻盖 .

[0054] Wherein, H 筒体 is the height of the barrel portion 210, H 第二本体213 is the height of the second body 213, H 壳体120 is the height of the shell 120, and H 翻盖 is the height of the end cover 110.

[0055] It can be understood that the height of the barrel portion 210 is calculated and limited in this way, so that the barrel portion 210 can completely wrap and cover the battery cell body 100.

[0056] In the embodiment, please refer to Figure 2 The insulating part 200 wraps the outer wall of the battery cell body 100, and an adhesive layer 230 is arranged between the outer wall of the battery cell body 100 and the insulating part 200.

[0057] Optionally, the adhesive layer 230 can be double-sided tape, adhesive, etc.

[0058] It can be understood that the inner wall of the barrel portion 210 and the flip cover portion 220 of the insulating part 200 is coated with an adhesive layer 230, so that the insulating part 200 can be fully adhered and covered to the outer wall of the battery cell body 100 through the adhesive layer 230.

[0059] It is worth mentioning that in order to ensure that the barrel portion 210 and the four side walls of the battery cell body 100 can be normally adhered and do not affect each other. Therefore, in the embodiment, please refer to Figure 5 and Figure 6 A release film 240 is arranged between the adhesive layer 230 and the outer wall of the battery cell body 100, and the release film 240 is higher than one side of the opening 211 of the barrel portion 210.

[0060] In the embodiment, please refer to Figure 5 and Figure 6 The adhesive layer 230 is arranged on the insulating part 200, and the release film 240 is arranged between the barrel portion 210 and the outer wall of the battery cell body 100. Among them, the release film 240 is arranged between the adhesive layer 230 of the first body 212 and the outer wall of the battery cell body 100.

[0061] It can be understood that, in the assembling process, the battery body 100 is placed into the barrel part 210, the inner wall of the second body 213 of the barrel part 210 is bonded with the bottom wall of the battery body 100; then, the release film 240 is separated from the bonding layer 230 by clamping and pulling the release film 240, so that the bonding layer 230 is bonded with the outer wall of the battery body 100, and at the same time, the side wall of the battery body 100 is bonded with the inner wall of the first body 212; finally, the flip part 220 is folded to the position of the end cover 110 and the flip part 220 is bonded with the end cover 110.

[0062] Optionally, referring to Figure 6 , the release film 240 is higher than the opening 211 of the barrel part 210 by at least L, and L is a value of 5 mm and above. It can be understood that, in this way, the release film 240 is clamped and pulled conveniently.

[0063] In this embodiment, referring to Figure 7 , the insulating part 200 further comprises a connecting part 250, which connects the flip part 220 and the barrel part 210.

[0064] It can be understood that, after the battery body 100 is wrapped and bonded in the barrel part 210 and the flip part 220, the connecting part 250 can be used to connect and bind the flip part 220 and the barrel part 210 again, so as to strengthen the bonding effect and the sealing performance of the barrel part 210 and the flip part 220 of the insulating part 200 at the connection.

[0065] Optionally, the connecting part 250 is arranged on at least one side edge of the flip part 220, so that the flip part 220 is bonded with the barrel part 210 through the connecting part 250. It can be understood that, in addition to the side of the barrel part 210 and the flip part 220, the connecting part 250 can be arranged on the remaining three side edges of the flip part 220; wherein, the connecting part 250 is also provided with a bonding layer 230, and after the insulating part 200 and the battery body 100 are wrapped and bonded, the connecting part 250 on the flip part 220 is bonded with the outer wall of the barrel part 210, so as to strengthen the bonding effect and the sealing performance of the connection.

[0066] Optionally, referring to Figure 7The connecting part 250 is arranged on the barrel part 210, and the connecting part 250 is arranged on at least one side edge at the opening 211, so that the barrel part 210 is bonded with the flip part 220 through the connecting part 250. It can be understood that, in addition to the side edge where the barrel part 210 and the flip part 220 are connected, the connecting part 250 can be arranged on the remaining three side edges of the barrel part 210 at the opening 211; wherein the connecting part 250 is also provided with the bonding layer 230, and after the wrapping and bonding of the insulating part 200 and the battery body 100, the connecting part 250 on the barrel part 210 is bonded with the outer wall of the flip part 220, so as to strengthen the bonding effect and the sealing performance of the connecting part.

[0067] Optionally, the connecting part 250 can also be a separately arranged connecting part 250, and the connecting part 250 is provided with the bonding layer 230, so that the connecting part of the barrel part 210 and the flip part 220 can be bonded separately.

[0068] The working principle and process of the battery cell 010 provided in the embodiment of the utility model are as follows: in the assembly process, the battery body 100 is placed into the barrel part 210, so that the inner wall of the second body 213 of the barrel part 210 is bonded with the bottom wall of the battery body 100; then, the release film 240 is separated from the bonding layer 230 by clamping and pulling the release film 240, so that the bonding layer 230 is bonded with the outer wall of the battery body 100, and at the same time, the side wall of the battery body 100 is bonded with the inner wall of the first body 212; finally, the flip part 220 is folded towards the position of the end cover 110 and bonded with the end cover 110, and the assembly of the battery body 100 and the insulating part 200 is completed.

[0069] After the assembly of the battery body 100 and the insulating part 200 is completed, the connecting part 250 is used to re-bond the connecting part of the barrel part 210 and the flip part 220, so as to strengthen the bonding effect and the sealing performance of the connecting part.

[0070] In summary, the battery cell 010 provided in the embodiment of the utility model is packaged by the insulating part 200 including the barrel part 210 and the flip part 220, the barrel part 210 wraps the outer wall and the bottom wall of the battery body 100, and the flip part 220 wraps the top wall of the battery body 100, so that the insulating part 200 wraps the outer wall of the battery body 100 in all directions, and the battery body 100 is insulated from the external environment to avoid short circuiting and causing fire or explosion and other safety hazards. Compared with the structure design that the insulating film and the top patch respectively insulate the battery body 100 in the prior art, the insulating film and the top patch in the prior art are combined into the integrated box type structure insulating part 200 in the application, which not only reduces the number of structural parts, but also reduces the manufacturing steps of the battery cell 010 to a certain extent, saves the manufacturing time, greatly improves the manufacturing efficiency of the battery cell 010, and accordingly reduces the manufacturing cost of the battery cell 010.

[0071] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An electric cell, characterized by, The application relates to an electric core, which comprises the following parts: an electric core body; an insulating part, the outer wall of the electric core body is wrapped by the insulating part, the insulating part comprises a barrel part and a cover part, the barrel part wraps the outer wall and the bottom wall of the electric core body, the barrel part is provided with an opening, and the cover part is connected with any one side of the opening and wraps the top wall of the electric core body.

2. The electric cell of claim 1, wherein, The outer wall of the electric core body is adhesively wrapped by the insulating part, and an adhesive layer is arranged between the outer wall of the electric core body and the insulating part.

3. The electric cell of claim 2, wherein, A release film is arranged between the adhesive layer and the outer wall of the electric core body, and the release film is higher than the opening side of the barrel part; The release film is separated from the adhesive layer by pulling the release film, so that the adhesive layer is adhesively connected with the outer wall of the electric core body.

4. The cell of claim 3, wherein, The release film is higher than the opening of the barrel part by at least 5 mm.

5. The electric cell of claim 3, wherein, The adhesive layer is arranged on the insulating part, and the release film is arranged between the barrel part and the outer wall of the electric core body.

6. The electric cell of claim 5, wherein, The barrel part comprises a first body and a second body connected with each other, the first body is connected with the cover part, the second body is arranged on the opposite side of the first body respectively, the first body wraps the outer wall of the electric core body, and the second body wraps the bottom wall of the electric core body. The release film is arranged between the adhesive layer of the first body and the outer wall of the electric core body.

7. The electric cell of claim 6, wherein, The electric core body comprises a shell and an end cover connected with each other. The height of the cylindrical portion is: H 筒体 = H 第二本体 + H 壳体 + H 翻盖 ; wherein H 筒体 is the height of the barrel portion, H 第二本体 is the height of the second body, H 壳体 is the height of the housing, H 翻盖 is the height of the end cap.

8. The electric cell of claim 1, wherein, The insulating part further comprises a connecting part, the connecting part connects the cover part and the barrel part. The connecting part is arranged on at least one side of the cover part, so that the cover part is adhesively connected with the barrel part through the connecting part; or the connecting part is arranged on the barrel part, and the connecting part is arranged on at least one side of the opening, so that the barrel part is adhesively connected with the cover part through the connecting part.

9. The electric cell of claim 8, wherein, At least one avoiding groove is arranged on the cover part, and the avoiding groove is used for avoiding the code, the pole and the explosion-proof valve arranged on the electric core body.

10. A battery, characterized by The application further relates to an electric core comprising the electric core as claimed in any one of claims 1-9.

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