Battery and battery device
By pasting tape on part of the battery ears to provide support, the problem of folding or winding of the ears is solved, and the welding quality and battery yield are improved.
Patent Information
- Application Number
- CN202421058871.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-15
AI Technical Summary
During the battery assembly process, the extreme ears are easily folded or wound, resulting in uneven contact surfaces between the extreme ears and the adapter, resulting in missed welding, reducing the yield rate of the battery.
Apply tape to some areas of the pole ear. The tape can provide support to the pole ear, reducing the probability of the pole ear folding or winding, thereby improving the welding quality of the pole ear and the adapter blade.
By using tape to support the electrode ears, the risk of folding or winding of the electrode ears is significantly reduced, the welding quality of the electrode ears and adapters is improved, and the yield of the battery is enhanced.
Smart Images
Figure CN222515003U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery and a battery device. Background Art
[0002] During the battery assembly process, the battery cell needs to be placed into the battery case and the tabs on the battery cell and the adapter on the battery case need to be welded. However, when the battery cell is placed into the battery case by the robot, the tabs are prone to folding or winding, which will cause the contact surface between the tabs and the adapter to be uneven, resulting in welding leaks during the welding process, thereby reducing the battery yield.
[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0004] The utility model provides a battery, which can improve the technical problem of welding leakage of a pole ear and a switching piece.
[0005] Battery housing;
[0006] At least one adapter sheet, fixed to the battery housing;
[0007] A battery cell, at least partially located in a battery housing, comprising a battery cell body, two tabs connected to opposite sides of the battery cell body, the tabs and the adapter plates being arranged correspondingly, the tabs being welded to the corresponding adapter plates, and the tabs comprising a first extension portion and a second extension portion, the second extension portion being connected to an end of the first extension portion away from the battery cell body;
[0008] The adhesive tape is partially bonded to the side of the first extension portion facing the adapter sheet and partially bonded to the surface of the battery cell body in the adapter sheet and the pole ear that are welded to each other.
[0009] The utility model adheres adhesive tape to a partial area of the pole ear, and the adhesive tape can have a certain supporting effect on the pole ear, so that the arrangement can reduce the probability of the pole ear being folded or wound, and further improve the welding quality of the pole ear and the adapter sheet.
[0010] The utility model also provides a battery device, which comprises the battery mentioned above.
[0011] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing.
[0013] in:
[0014] Figure 1 This is a schematic diagram of the structure of a battery cell in an exemplary embodiment of the battery disclosed herein;
[0015] Figure 2 This is a schematic structural diagram of a battery cell from another perspective in an exemplary embodiment of the battery disclosed herein.
[0016] Description of reference numerals:
[0017] 1. Battery case; 2. Adapter; 3. Battery cell; 31. Battery cell body; 311. First side surface; 312. Second side surface; 32. Tab; 41. First extension portion; 42. Second extension portion; 5. Adhesive tape. DETAILED DESCRIPTION
[0018] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.
[0019] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.
[0020] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.
[0021] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to one or more "upper", "lower", or "inner", "outer" of another element, it can not only be directly connected to the "upper", "lower", "inner", "outer" of another element or elements, but can also be indirectly connected to the "upper", "lower", "inner", "outer" of another element or elements through an intermediate element.
[0022] like Figure 1 , 2 As shown, Figure 1 is a schematic diagram of the structure of a battery cell in an exemplary embodiment of the battery disclosed herein, Figure 2 This is a schematic structural diagram of a battery cell from another perspective in an exemplary embodiment of the battery disclosed herein.
[0023] like Figure 1 , 2 As shown, the battery cell body 31 has a length direction X, a height direction Y, and a thickness direction Z. The height direction of the battery cell body 31 is the direction in which the tab 32 extends out of the battery cell body 31 . The thickness direction Z of the battery cell body is the direction perpendicular to the maximum side of the battery cell body 31 . The length direction X of the battery cell body 31 is the direction perpendicular to the height direction Y and the thickness direction Z of the battery cell body 31 .
[0024] The battery includes: a battery case 1, at least one adapter 2, a battery cell 3, and a tape 5, wherein the adapter 2 is fixed on the battery case 1; the battery cell 3 is at least partially located in the battery case 1, and the battery cell 3 includes a battery cell body 31, two pole ears 32 connected to opposite sides of the battery cell body 31, the pole ears 32 and the adapter 2 are correspondingly arranged, the pole ears 32 are welded to the corresponding adapter 2, and the pole ears 32 include a first extension portion 41 and a second extension portion 42, and the second extension portion 42 is connected to an end of the first extension portion 41 away from the battery cell body 31; in the adapter 2 and the pole ears 32 welded to each other, the tape 5 is partially bonded to the side of the first extension portion 41 facing the adapter 2, and partially bonded to the surface of the battery cell body 31.
[0025] In this exemplary embodiment, the tape 5 is attached to a partial area of the pole lug 32 . The tape 5 can provide a certain support to the pole lug 32 . This arrangement can reduce the probability of the pole lug 32 being folded or wound, thereby improving the welding quality between the pole lug 32 and the adapter 2 .
[0026] In this exemplary embodiment, Figure 1 , 2As shown, in the mutually bonded tab 32 and tape 5, in the extension direction of the tab 32 from the battery body 31, the ratio of the extension dimension h1 of the portion of the tape 5 that exceeds the battery body 31 to the total extension dimension h2 of the tape 5 is 8% to 50%. For example, h1 / h2 can be equal to 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc. If h1 / h2 is too large, h1 is too large, and the size of the remaining second extension portion 42 of the tab 32 is too small, which will affect the welding area of the tab 32 and the adapter 2, and further affect the flow area of the tab 32; if h1 / h2 is too small, h1 is too small, the support effect of the tape 5 on the tab 32 is weak, and the tab 32 is easy to be folded and wound. In this exemplary embodiment, h1 / h2 is set to a suitable value, which can reduce the risk of folding and winding of the pole tab 32 while ensuring the flow area of the pole tab 32 .
[0027] It should be noted that the extension size of the portion of the tape 5 that exceeds the cell body 31 is the size of the portion of the tape 5 that exceeds the cell body 31 in the height direction Y of the cell body after the tab with the tape attached is flattened in the height direction Y of the cell body. The total extension size of the tape 5 is the size of the tape 5 in the height direction Y of the cell body after the tab with the tape attached is flattened in the height direction Y of the cell body.
[0028] In this exemplary embodiment, Figure 1 , 2 As shown, in the mutually bonded pole ear 32 and tape 5, in the extending direction of the pole ear 32 from the battery cell body 31, the extension dimension h1 of the portion of the tape 5 extending beyond the battery cell body 31 is 3mm-15mm. For example, the extension dimension h1 of the portion of the tape 5 extending beyond the battery cell body 31 can be equal to 3mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc.
[0029] In this exemplary embodiment, Figure 1 , 2 As shown, in the extension direction of the tab 32 from the battery body 31, the total extension size of the tape 5 is 30mm-50mm. For example, the total extension size of the tape 5 can be equal to 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm, etc.
[0030] In this exemplary embodiment, Figure 1 , 2As shown, in the mutually bonded pole tab 32 and tape 5, the extension dimension s1 of the tape 5 in the first direction is greater than the extension dimension s2 of the pole tab 32 in the first direction; and both sides of the tape 5 in the first direction are arranged beyond the pole tab 32, and the first direction is perpendicular to the extension direction of the pole tab 32 from the battery cell body 31. This arrangement can improve the supporting effect of the tape 5 on the pole tab.
[0031] It should be noted that the extension of the tape 5 in the first direction is the size of the tape 5 perpendicular to the height direction Y of the battery body and the thickness direction of the tape after the tab with the tape attached is flattened along the height direction Y of the battery body. Similarly, the extension of the tab 32 in the first direction is the size of the tab perpendicular to the height direction Y of the battery body and the thickness direction of the tab after the tab is flattened along the height direction Y of the battery body.
[0032] In this exemplary embodiment, Figure 1 , 2 As shown, in the mutually bonded pole ear 32 and the adhesive tape 5, the ratio of the extension dimension s3 of the adhesive tape 5 on one side of the first direction beyond the pole ear 32 to the extension dimension s1 of the adhesive tape 5 in the first direction is 5% to 30%. For example, s3 / s1 can be equal to 5%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, etc. If s3 / s1 is too large, s3 is too large, and the adhesive tape 5 is easy to interfere with the battery housing 1; if s3 / s1 is too small, s3 is too small, and the supporting effect of the adhesive tape 5 on the pole ear 32 is not obvious. In this exemplary embodiment, s3 / s1 is set to a suitable size, which can not only ensure the supporting effect of the tape 5 on the tab 32 , but also reduce the risk of interference between the tape 5 and the battery housing 1 .
[0033] It should be noted that the extension dimension s3 of the tape 5 in the first direction beyond the pole lug 32 and the extension dimension of the tape 5 in the first direction are, after the pole lug attached with the tape is flattened along the height direction Y of the battery body, the dimension of the part of the tape 5 that exceeds the pole lug 32 in the first direction is perpendicular to both the height direction Y of the battery body and the thickness direction of the tape.
[0034] In this exemplary embodiment, Figure 1 , 2 As shown, in the mutually bonded pole lug 32 and tape 5, the extension dimension s3 of the tape 5 beyond the pole lug 32 in the first direction is 2.5 mm-15 mm. For example, the extension dimension of the tape 5 beyond the pole lug 32 in the first direction can be equal to 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc.
[0035] In this exemplary embodiment, Figure 1 , 2 As shown, the extension dimension s1 of the adhesive tape 5 in the first direction is 30 mm-55 mm. For example, the extension dimension s1 of the adhesive tape 5 in the first direction can be equal to 30 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, 41 mm, 42 mm, 43 mm, 44 mm, 45 mm, 46 mm, 47 mm, 48 mm, 49 mm, 50 mm, 55 mm, etc.
[0036] In this exemplary embodiment, Figure 1 , 2 As shown, the cell body 31 includes a first side surface 311 and a second side surface 312, the tab 32 is connected to the first side surface 311, the second side surface 312 intersects with the first side surface 311, and a portion of the adhesive tape 5 is bonded to the second side surface 312. This arrangement can improve the bonding strength between the adhesive tape 5 and the cell body 31.
[0037] In this exemplary embodiment, Figure 1 , 2 As shown, the second side surface 312 is the largest side surface of the battery cell body. It should be understood that in other exemplary embodiments, the second side surface 312 may also be other smaller side surfaces of the battery cell body. In addition, the tape may also be at least partially attached to the first side surface 311 .
[0038] In this exemplary embodiment, Figure 1 , 2 As shown, the tab 32 can be welded through the second extension portion 42 and the adapter 2. The tab 32 and the second extension portion 42 can be welded by laser welding, ultrasonic welding, or resistance welding.
[0039] In this exemplary embodiment, Figure 1 , 2 As shown, adhesive tape is attached to both tabs 32 in the battery cell. It should be understood that in other exemplary embodiments, adhesive tape may be attached to only one tab.
[0040] In this exemplary embodiment, the two tabs 32 may be a positive tab and a negative tab respectively, and at least one adapter 2 may be electrically connected to a pole in the battery or to the battery housing. Figure 1 , 2 As shown, the adapter plate 2 can be fixed to the inner side of the largest side wall in the battery housing. In other exemplary embodiments, the adapter plate 2 can also be fixed to other parts of the battery housing.
[0041] It should be noted that a battery includes a cell and an electrolyte, and a battery is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion includes a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material.
[0042] In this exemplary embodiment, the battery may be a lithium-ion battery. It should be understood that in other exemplary embodiments, the battery may also be a nickel-cadmium battery, a nickel-metal hydride battery, a lithium polymer battery, a sodium-ion battery, a solid-state battery, etc.
[0043] In this exemplary embodiment, the battery can be a square battery, that is, the battery can be a quadrangular prism battery. The quadrangular prism battery mainly refers to a battery with a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.
[0044] In other exemplary embodiments, the battery may be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end surfaces and a curved surface located between the two circular end surfaces.
[0045] The battery may be a wound battery, that is, a first pole piece, a second pole piece having electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding core.
[0046] The battery can also be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.
[0047] The exemplary embodiment further provides a battery device, which is a battery module or a battery pack.
[0048] The battery module includes a plurality of batteries, which may be square batteries, and the battery module may further include end plates and side plates, which are used to fix the plurality of batteries. The batteries may be cylindrical batteries, which may be arranged on a support plate to form a battery module.
[0049] The battery pack includes a plurality of batteries and a box body, and the box body is used to fix the plurality of batteries.
[0050] It should be noted that the battery pack includes a battery, and the battery may be multiple, and the multiple batteries are arranged in the box. Among them, the multiple batteries can be installed in the box after forming a battery module. Alternatively, the multiple batteries can be directly arranged in the box, that is, there is no need to group the multiple batteries, and the box is used to fix the multiple batteries.
[0051] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing what is disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and embodiments are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.
[0052] The drawings in the present disclosure only relate to the structures involved in the present disclosure, and other structures may refer to the usual design. In the absence of conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other to obtain new embodiments. It should be understood by those of ordinary skill in the art that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and should be included in the scope of the claims of the present disclosure.
[0053] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A battery, characterized in that: The battery comprises: Battery housing (1); At least one adapter sheet (2) fixed on the battery housing (1); A battery cell (3), at least partly located in the battery housing (1), the battery cell (3) comprising a battery cell body (31), and two pole ears (32) connected to opposite sides of the battery cell body (31), the pole ears (32) and the adapter sheet (2) being arranged correspondingly, the pole ears (32) being welded to the corresponding adapter sheet (2), and the pole ears (32) comprising a first extension portion (41) and a second extension portion (42), the second extension portion (42) being connected to an end of the first extension portion (41) away from the battery cell body (31); The adhesive tape (5) is partially bonded to the side of the first extension portion (41) facing the adapter sheet (2) and the pole lug (32) that are welded to each other, and partially bonded to the surface of the battery cell body (31).
2. The battery according to claim 1, characterized in that In the mutually bonded pole lug (32) and the adhesive tape (5), in the extension direction of the pole lug (32) from the battery cell body (31), the ratio of the extension dimension of the adhesive tape (5) exceeding the battery cell body (31) to the total extension dimension of the adhesive tape (5) is 8% to 50%.
3. The battery according to claim 2, characterized in that In the mutually bonded pole lug (32) and the adhesive tape (5), in the extension direction of the pole lug (32) from the battery cell body (31), the extension dimension of the adhesive tape (5) beyond the battery cell body (31) is 3 mm to 15 mm; And / or, in the direction in which the pole ear (32) extends from the battery cell body (31), the total extension dimension of the adhesive tape (5) is 30 mm to 50 mm.
4. The battery according to claim 1, characterized in that In the mutually bonded pole lug (32) and the adhesive tape (5), an extension dimension of the adhesive tape (5) in a first direction is greater than an extension dimension of the pole lug (32) in the first direction; Furthermore, both sides of the adhesive tape (5) in the first direction are arranged beyond the pole lugs (32), and the first direction and the extension direction of the pole lugs (32) from the battery cell body (31) are perpendicular.
5. The battery according to claim 4, characterized in that In the mutually bonded pole lug (32) and the adhesive tape (5), the ratio of the extension dimension of the adhesive tape (5) on one side in the first direction beyond the pole lug (32) to the extension dimension of the adhesive tape (5) in the first direction is 5% to 30%.
6. The battery according to claim 5, characterized in that In the mutually bonded pole lug (32) and the adhesive tape (5), the extension dimension of the adhesive tape (5) beyond the pole lug (32) in the first direction is 2.5 mm to 15 mm; And / or, the extension dimension of the adhesive tape (5) in the first direction is 30 mm-55 mm.
7. The battery according to any one of claims 1 to 6, characterized in that: The battery cell body (31) comprises a first side surface (311) and a second side surface (312), the pole ear (32) is connected to the first side surface (311), the second side surface (312) intersects with the first side surface (311), and a partial structure of the adhesive tape (5) is bonded to the second side surface (312).
8. The battery according to any one of claims 1 to 6, characterized in that: The battery is a quadrangular prism battery.
9. The battery according to any one of claims 1 to 6, characterized in that: The pole tab (32) is welded to the adapter plate (2) via the second extension portion (42).
10. A battery device, characterized in that: The battery device comprises the battery according to any one of claims 1 to 9.