Battery

Abstract

The utility model relates to the technical field of battery production, and discloses a battery which comprises a battery cell and a protection plate assembly, the battery cell comprises a battery cell main body and a tab, the top end of the battery cell main body is provided with a top sealing structure, and the tab is led out from the top end of the battery cell main body, penetrates through the top sealing structure and is exposed out of the top sealing structure; the protection plate assembly is arranged on one side of the top sealing structure and is electrically connected with the tab; tab glue is arranged at the position, corresponding to the top end of the top sealing structure, of the tab, the tab glue comprises a first end part and a second end part connected with the first end part, the first end part is located inside the top sealing structure, the second end part is located outside the top sealing structure, and a bent part is formed at the joint of the first end part and the second end part. The battery has the following technical effects that the tab glue is arranged in the bent state, so that the protection plate assembly connected with the tab can be arranged in a space on one side of the top sealing structure, the length size of the battery is reduced, the thickness size of the battery is not increased, and the overall occupied space of the battery is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery production technical field, and specifically relates to a battery. BACKGROUND

[0002] In wearable devices, such as AR glasses, VR glasses and the like, due to the space limitation of the device itself, the structure and performance requirements of the battery adapted to the device are more demanding, not only requiring the battery to have a small size, but also requiring the battery to have sufficient capacity. Due to the generally small size of such batteries, in the prior art, in order to reduce the production process difficulty, after the protection plate assembly and the tab are welded, no further bending operation is performed, or only the tab part is bent, thereby causing the protection plate assembly and the tab to occupy a large space in the length direction of the battery, and part of the space in the thickness direction of the battery is not utilized, resulting in space waste, which is not conducive to the reduction of the size of the battery and the improvement of the capacity of the battery. SUMMARY

[0003] In order to solve the deficiencies of the prior art, the utility model provides a battery, by setting the tab rubber to a bent state, the protection plate assembly connected with the tab can be placed in the space on one side of the top sealing structure, the space in the thickness direction of the battery is fully utilized, the length size of the battery is reduced, the thickness size of the battery is not increased, the overall occupied space of the battery is effectively reduced, and the capacity of the battery is also improved.

[0004] The technical effects achieved by the utility model are realized through the following technical aspects:

[0005] The utility model provides a battery, including the electric core and the protection plate assembly, the electric core includes the electric core main part and the tab, the top of electric core main part is provided with top sealing structure, the tab is led out from the top of electric core main part and passes through top sealing structure and exposes outside top sealing structure, the protection plate assembly is located one side of top sealing structure and is connected with tab electricity, the thickness direction of protection plate assembly is parallel with the length direction of electric core main part;

[0006] The tab is provided with a tab rubber corresponding to the top end position of the top sealing structure, the tab rubber includes a first end and a second end connected to the first end, the first end is located inside the top sealing structure, the second end is located outside the top sealing structure, and a bending portion is formed at the connection between the first end and the second end.

[0007] As a further description of the utility model technical scheme, the bending angle of the bending portion is 50°-130°.

[0008] As a further description of the technical solution of the present invention, the battery further includes a hot melt adhesive layer, which is arranged between the protection plate assembly and the end face of the battery cell body.

[0009] As a further description of the technical solution of the present utility model, the battery further includes a silicone pad, which is arranged between the hot melt adhesive layer and the end face of the battery cell body.

[0010] As a further description of the technical solution of the present invention, a foam double-sided tape is connected between the protection plate assembly and the end face of the battery cell body.

[0011] As a further description of the technical solution of the present invention, the battery also includes insulating tape, which is wrapped around the outside of the battery cell and the protection plate assembly.

[0012] As a further description of the technical solution of the present invention, side sealing structures are provided on the opposite sides of the battery cell body, the top sealing structure is connected between the two opposite side sealing structures, an accommodating space is formed between the top sealing structure and the side sealing structure, and the protective plate assembly is located in the accommodating space.

[0013] As a further description of the technical solution of the present invention, the protection plate assembly includes a first protection plate and a second protection plate stacked in sequence along the length direction of the battery body, and the second protection plate is electrically connected to the tab.

[0014] As a further description of the technical solution of the present invention, the battery further includes a nickel sheet, and the second protective plate and the tab are connected via the nickel sheet.

[0015] As a further description of the technical solution of the present invention, the first protective plate is a hard protective plate, the second protective plate is a soft protective plate, and a connection end for connecting to an external device is formed on the second protective plate.

[0016] In summary, the present invention has at least the following advantages:

[0017] The battery provided by this utility model, by providing a bend in the tab adhesive, bends the tab adhesive and the tab. This allows the protective plate assembly connected to the tab to be placed within the space on one side of the top seal structure, fully utilizing the space in the battery's thickness direction without increasing the battery's thickness. The bend is located precisely at the top edge of the top seal structure, minimizing the battery's length. This effectively reduces the overall battery footprint and facilitates increased battery capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a battery structure schematic view of the embodiment 1 of the utility model;

[0019] Figure 2 It is a partial section view of the battery of the embodiment 1 of the utility model;

[0020] Figure 3 It is a partial structure schematic view of the battery of the embodiment 2 of the utility model;

[0021] Figure 4 It is a partial structure schematic view of the battery of the embodiment 3 of the utility model;

[0022] Figure 5 It is an explosion schematic view of the battery of the embodiment 4 of the utility model.

[0023] Mark in drawing:

[0024] 1, electric core;11, electric core main body;12, pole lug;13, top seal structure;14, pole lug glue;141, first end part;142, second end part;143, bending part;15, side seal structure;16, containing space;

[0025] 2, protection plate assembly;21, first protection plate;22, second protection plate;221, connecting end;

[0026] 3, hot melt adhesive layer;4, silica gel pad;5, foam double-sided adhesive;6, insulating adhesive paper;7, nickel sheet. Specific implementation

[0027] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the following will combine the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described. The described embodiment is a part of the embodiment of the utility model, instead of all the embodiments.

[0028] Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] Reference Figures 1 to 2The battery provided by the embodiment comprises a battery cell 1 and a protection plate assembly 2. The battery cell 1 comprises a battery cell body 11 and a tab 12. The top end of the battery cell body 11 is provided with a top sealing structure 13. The tab 12 is led out from the top end of the battery cell body 11 and passes through the top sealing structure 13 to be exposed outside the top sealing structure 13. The protection plate assembly 2 is arranged on one side of the top sealing structure 13 and is electrically connected with the tab 12. The thickness direction of the protection plate assembly 2 is parallel to the length direction of the battery cell body 11.

[0031] The top sealing structure 13 is in the shape of a plate and is arranged in the length direction of one side surface of the battery cell body 11. The top sealing structure 13 is perpendicular to the top end surface of the battery cell body 11. A space for accommodating the protection plate assembly 2 is formed between the top sealing structure 13 and the top end surface of the battery cell body 11. The protection plate assembly 2 is arranged in the space. The thickness dimension of the battery is not increased, and the length dimension of the battery is not additionally occupied. The space for accommodating the protection plate assembly 2 is fully utilized, and the overall size of the battery is effectively compressed.

[0032] The tab 12 is provided with a tab rubber 14 at the top end position of the top sealing structure 13. The tab rubber 14 comprises a first end portion 141 and a second end portion 142 connected with the first end portion 141. The first end portion 141 is located inside the top sealing structure 13, and the second end portion 142 is located outside the top sealing structure 13. A bending portion 143 is formed at the connection position of the first end portion 141 and the second end portion 142. Although the tab 12 and the tab rubber 14 are both led out from the top end of the top sealing structure 13, the tab 12 and the tab rubber 14 will not increase the length dimension of the battery because the bending portion 143 is just located at the edge position of the top end of the top sealing structure 13. The tab 12 is bent because the tab rubber 14 is in the bent state. It should be noted that the tab rubber 14 and the tab 12 are both bent towards one side of the position where the protection plate assembly 2 is located. Thus, the electrical connection between the tab 12 and the protection plate assembly 2 is facilitated.

[0033] It can be understood that the tab rubber 14 and the tab 12 are in the bent state by arranging the bending portion 143 on the tab rubber 14. The protection plate assembly 2 can be arranged in the space on one side of the top sealing structure 13. The space in the thickness direction of the battery is fully utilized, and the thickness dimension of the battery is not increased. The length dimension of the battery is reduced to the greatest extent because the bending portion 143 is just located at the edge position of the top end of the top sealing structure 13. Thus, the overall occupied space of the battery is effectively reduced. The occupied space of each component at the top end of the battery cell body 11 is reduced by reasonably arranging the positions of the top sealing structure 13, the protection plate assembly 2, the tab 12 and the tab rubber 14. Thus, the internal space of the battery cell body 11 is expanded, and the capacity of the battery is improved. The battery of the embodiment is especially suitable for wearable devices, such as AR glasses, VR glasses and the like.

[0034] In some embodiments, the bending angle of the bending portion 143 is 50°-130°, preferably about 90°, so that the shape of the bending portion 143 tends to be more L-shaped, thereby maximizing the compression of the length dimension of the battery and being more conducive to the reduction of the occupied space of the battery and the improvement of the capacity of the battery.

[0035] The battery of the present embodiment can place the protection plate assembly connected with the tab into the space on the side of the top sealing structure by setting the bending portion on the tab adhesive and making the tab adhesive and the tab in a bent state, thereby making full use of the space in the thickness direction of the battery, reducing the length dimension of the battery without increasing the thickness dimension of the battery, effectively reducing the overall occupied space of the battery, and being more conducive to the improvement of the capacity of the battery. By setting the bending angle of the bending portion, the shape of the bending portion tends to be more L-shaped, thereby maximizing the compression of the length dimension of the battery and being more conducive to the reduction of the occupied space of the battery and the improvement of the capacity of the battery.

[0036] Embodiment 2

[0037] As a further optimization of Embodiment 1, reference is made to Figure 3 The battery further comprises a hot melt adhesive layer 3 arranged between the protection plate assembly 2 and the top end surface of the cell body 11, for fixing the protection plate assembly 2 on the cell body 11 to prevent the protection plate assembly 2 from being deflected or shaken during use or transportation, and to ensure the stable connection between the tab 12 and the protection plate assembly 2. Since the hot melt adhesive layer 3 is formed by melting and then solidifying the hot melt adhesive through heating, it has strong plasticity, and the size and shape of the hot melt adhesive layer 3 can be flexibly set according to actual needs, so it can be applied to protection plate assemblies 2 of different specifications. At the same time, the hot melt adhesive layer 3 has stronger adhesion than ordinary double-sided tape, which can ensure the stability of the connection between the protection plate assembly 2 and the cell body 11.

[0038] In some embodiments, since there is a large gap between the protection plate assembly 2 and the top end surface of the cell body 11, a silica gel pad 4 can be arranged between the hot melt adhesive layer 3 and the top end surface of the cell body 11 to further fill the gap between the protection plate assembly 2 and the cell body 11, further strengthen the connection between the protection plate assembly 2 and the cell body 11, and improve the stability of the electrical connection of the battery.

[0039] As a further optimization, the battery further comprises an insulating tape 6 wrapped on the outside of the battery cell 1 and the protection plate assembly 2, wherein the insulating tape 6 is mainly wrapped on the top end of the battery cell body 11 and the components located at the top end of the battery cell body 11, including the protection plate assembly 2, the tab 12, the tab insulating tape 14 and the top sealing structure 13. On the one hand, the insulating tape 6 can protect the top end of the battery cell body 11 and the components located at the top end of the battery cell body 11, prevent the occurrence of electric leakage or short circuit, and improve the safety of the battery; on the other hand, the insulating tape 6 can further consolidate the connection relationship between the protection plate assembly 2 and the battery cell body 11, and further improve the stability of the battery electrical connection.

[0040] By adopting the combination of the hot melt adhesive layer 3 and the insulating tape 6 to realize the connection and fixation of the protection plate assembly 2 and the battery cell body 11, it can be applied to different types of protection plate assemblies 2, such as SIP plates, combination plates, combinations of soft plates and modules, etc., and has strong applicability.

[0041] Embodiment 3

[0042] As a further optimization of embodiment 1, referring to Figure 4 , the protection plate assembly 2 and the end face of the battery cell body 11 are connected by a foam double-sided tape 5, which is used to fix the protection plate assembly 2 on the battery cell body 11 to prevent the protection plate assembly 2 from tilting or shaking during use or transportation, and to ensure the stable connection of the tab 12 and the protection plate assembly 2. Since the foam double-sided tape 5 has a certain elasticity, it can adaptively change its thickness according to the actual gap distance between the protection plate assembly 2 and the battery cell body 11, thereby playing a filling and connecting role, and has strong applicability.

[0043] As a further optimization, the battery further comprises an insulating tape 6 wrapped on the outside of the battery cell 1 and the protection plate assembly 2, wherein the insulating tape 6 is mainly wrapped on the top end of the battery cell body 11 and the components located at the top end of the battery cell body 11, including the protection plate assembly 2, the tab 12, the tab insulating tape 14 and the top sealing structure 13. The insulating tape 6 can not only protect the top end of the battery cell body 11 and the components located at the top end of the battery cell body 11, improve the safety of the battery, but also further consolidate the connection relationship between the protection plate assembly 2 and the battery cell body 11, and improve the stability of the battery electrical connection.

[0044] By adopting the combination of the foam double-sided tape 5 and the insulating tape 6 to realize the connection and fixation of the protection plate assembly 2 and the battery cell body 11, it can be applied to different types of protection plate assemblies 2, such as SIP plates, combination plates, combinations of soft plates and modules, etc., and has strong applicability.

[0045] Embodiment 4

[0046] As a further optimization of embodiment 1, referring toFigure 5 The opposite sides of the battery cell body 11 are provided with side sealing structures 15, and the top sealing structure 13 is connected between the opposite two side sealing structures 15, the top of the top sealing structure 13 is flush with the top of the side sealing structure 15, and the accommodation space 16 is formed between the top sealing structure 13 and the side sealing structure 15, and the protection plate assembly 2 is located in the accommodation space 16. The protection plate assembly 2 reasonably utilizes the accommodation space 16 between the top sealing structure 13 and the side sealing structure 15, and the protection plate assembly 2 is placed in the accommodation space 16, which does not increase the thickness size of the battery, and does not need to additionally occupy the length size of the battery, and effectively compresses the overall occupied space of the battery.

[0047] The protection plate assembly 2 comprises a first protection plate 21 and a second protection plate 22 which are sequentially stacked along the length direction of the battery cell body 11, and the second protection plate 22 is electrically connected with the tab 12. It can be understood that the first protection plate 21 and the second protection plate 22 are both arranged parallel to the top end surface of the battery cell body 11 and are both located below the connection end of the tab 12, that is, the tab 12 is connected to the upper part of the second protection plate 22, thereby reasonably reducing the length size of the battery.

[0048] In some embodiments, the battery further comprises a nickel sheet 7, the nickel sheet 7 is in a U shape and is arranged parallel to the top end surface of the battery cell body 11, and the second protection plate 22 is connected with the tab 12 through the nickel sheet 7.

[0049] In the embodiment, the first protection plate 21 is a hard protection plate, and the second protection plate 22 is a soft protection plate, and the second protection plate 22 is formed with a connection end 221 for connecting with an external device, and the connection end 221 is formed by extending the side edge of the second protection plate 22 along the length direction of the battery cell body 11.

[0050] In the utility model, unless there is definite stipulation and limitation, the terms such as "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, can be fixed connection, also can be detachable connection, or integral;Can be mechanical connection, also can be electrical connection;It can be directly connected, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0051] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0052] In the utility model, unless otherwise expressly specified and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] Although the description of the utility model is combined with the above specific embodiments, it is obvious that persons skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A battery, characterized by, The application relates to a battery cell (1) and a protection plate assembly (2), the battery cell (1) comprising a battery cell body (11) and a tab (12), the top end of the battery cell body (11) being provided with a top sealing structure (13), the tab (12) being led out from the top end of the battery cell body (11) and exposed outside the top sealing structure (13) through the top sealing structure (13), the protection plate assembly (2) being arranged on one side of the top sealing structure (13) and electrically connected with the tab (12), and the thickness direction of the protection plate assembly (2) being parallel to the length direction of the battery cell body (11). The tab (12) is provided with a tab rubber (14) corresponding to the top end position of the top sealing structure (13), the tab rubber (14) comprising a first end portion (141) and a second end portion (142) connected with the first end portion (141), the first end portion (141) being located inside the top sealing structure (13), the second end portion (142) being located outside the top sealing structure (13), and a bending portion (143) being formed at the connection position of the first end portion (141) and the second end portion (142).

2. The battery of claim 1, wherein, The bending angle of the bending portion (143) is 50-130 degrees.

3. The battery of claim 1, wherein, The application further comprises a hot melt adhesive layer (3) arranged between the protection plate assembly (2) and the end surface of the battery cell body (11).

4. The battery of claim 3, wherein, The application further comprises a silica gel pad (4) arranged between the hot melt adhesive layer (3) and the end surface of the battery cell body (11).

5. The battery of claim 1, wherein, The protection plate assembly (2) and the end surface of the battery cell body (11) are connected with a foam double-sided adhesive (5).

6. The battery according to any one of claims 3-5, characterized in that, The application further comprises an insulating adhesive paper (6) wrapped on the outside of the battery cell (1) and the protection plate assembly (2).

7. The battery of claim 1, wherein, The opposite two sides of the battery cell body (11) are provided with side sealing structures (15), the top sealing structure (13) is connected between the opposite two side sealing structures (15), an accommodation space (16) is formed between the top sealing structure (13) and the side sealing structures (15), and the protection plate assembly (2) is located in the accommodation space (16).

8. The battery of claim 1, wherein, The protection plate assembly (2) comprises a first protection plate (21) and a second protection plate (22) arranged in sequence along the length direction of the battery cell body (11), and the second protection plate (22) is electrically connected with the tab (12).

9. The battery of claim 8, wherein, The application further comprises a nickel sheet (7) connecting the second protection plate (22) and the tab (12).

10. The battery of claim 8, wherein, The first protection plate (21) is a hard protection plate, the second protection plate (22) is a soft protection plate, and a connecting end (221) for connecting with external equipment is formed on the second protection plate (22).

Images