Battery and battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery device, the battery comprises a battery cell, an adhesive tape and an easy-to-tear part, the battery cell comprises a battery cell body and a tab, the battery cell body comprises a first side surface and a second side surface, the first side surface is the largest side surface of the battery cell body, and the second side surface is intersected with the first side surface; the tab is connected to one side, on the second side surface, of the battery cell body; the adhesive tape comprises a first bonding part and a second bonding part, the first bonding part is bonded to the tab, and the second bonding part is bonded to the first side surface; the easy-to-tear part is connected to the second bonding part, and the bonding strength of the easy-to-tear part and the battery cell body is smaller than that of the adhesive tape and the battery cell body. According to the battery, the adhesive tape can be conveniently torn off from the battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and a battery device. Background Technology

[0002] Adhesive tape is attached between the tabs and the cell body to insulate and secure the tabs. However, during cell recycling, the grippers have difficulty lifting the tape, making it difficult to tear it off.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] This invention provides a battery that improves upon the technical problem of the difficulty in disassembling battery cells.

[0005] The battery includes:

[0006] Battery cells, which include:

[0007] The battery cell body includes a first side and a second side. The first side is the largest side of the battery cell body, and the second side intersects with the first side.

[0008] The electrode tab is connected to one side of the second side of the battery cell body;

[0009] The tape includes a first adhesive portion and a second adhesive portion, wherein the first adhesive portion is adhered to the electrode tab and the second adhesive portion is adhered to the first side surface;

[0010] The easy-tear part is connected to the second adhesive part. The adhesive strength between the easy-tear part and the battery cell body is less than the adhesive strength between the tape and the battery cell body.

[0011] This invention features an easy-tear section at one end of the tape that is adhered to the largest side of the battery cell body. The grippers can easily start the tape through the easy-tear section, thus making it easy for the grippers to tear the tape off.

[0012] This utility model also provides a battery device, which includes the battery described above.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0014] To better understand this disclosure, reference may be made to the embodiments shown in the following figures. Components in the figures are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of this disclosure. Additionally, related elements or components may have different arrangements as known in the art. Furthermore, in the figures, the same reference numerals denote the same or similar components in various figures.

[0015] in:

[0016] Figure 1 This is a schematic diagram of the structure of a battery cell in an exemplary embodiment of the battery disclosed herein;

[0017] Figure 2 This is a schematic diagram of the battery cell from another perspective in an exemplary embodiment of the battery disclosed herein;

[0018] Figure 3 This is a schematic diagram of the structure of a battery cell in another exemplary embodiment of the battery disclosed herein.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Battery cell body; 11. First side; 12. Second side; 2. Tab; 3. Adhesive tape; 31. First adhesive part; 32. Second adhesive part; 321. First side; 4. Tearable part. Detailed Implementation

[0021] The technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this 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 this disclosure.

[0022] In the description of this disclosure, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more associated listed items. In particular, references to “the / described” object or “a” object are also intended to indicate one of a possible plurality of such objects.

[0023] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. 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. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0024] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this disclosure are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this disclosure. It should also be understood that, in the context of an element or feature being connected to one or more "upper," "lower," "inner," or "outer" elements, it can be directly connected to one or more "upper," "lower," "inner," or "outer" elements, or indirectly connected to one or more "upper," "lower," "inner," or "outer" elements through intermediate elements.

[0025] like Figure 1 , 2 As shown, Figure 1 This is a schematic diagram of the cell structure in an exemplary embodiment of the battery disclosed herein. Figure 2 This is a schematic diagram of the battery cell from another perspective in an exemplary embodiment of the battery disclosed herein.

[0026] The battery includes: a battery cell, an adhesive tape 3, and an easy-tear part 4. The battery cell includes a battery cell body 1 and a tab 2. The battery cell body 1 includes a first side 11 and a second side 12. The first side 11 is the largest side 11 of the battery cell body 1, and the second side 12 intersects with the first side 11. The tab 2 is connected to one side of the battery cell body on the second side 12. The adhesive tape 3 includes a first adhesive part 31 and a second adhesive part 32. The first adhesive part 31 is bonded to the tab 2, and the second adhesive part 32 is bonded to the first side 11. The easy-tear part 4 is connected to the second adhesive part 32. The adhesive strength between the easy-tear part 4 and the battery cell body is less than the adhesive strength between the adhesive tape 3 and the battery cell body.

[0027] In this exemplary embodiment, an easy-tear portion 4 is provided at one end of the tape that is adhered to the largest side of the battery cell body 1. The gripper can easily start the tape 3 through the easy-tear portion 4, thereby making it easy for the gripper to tear the tape off.

[0028] In this exemplary embodiment, as Figure 1 , 2 As shown, the tear-off portion 4 can be attached to the first side 11. The tear-off portion 4 does not increase the volume of the battery cell body 1 excessively. It should be understood that in other exemplary embodiments, the tear-off portion 4 may not be attached to the battery cell body; for example, there may be a gap between the tear-off portion 4 and the battery cell body, and correspondingly, the adhesive strength between the tear-off portion 4 and the battery cell body is 0.

[0029] In this exemplary embodiment, even if the tear-off portion 4 is attached to the first side 11, the adhesive strength between the tear-off portion 4 and the battery cell body can be 0. This arrangement facilitates the grippers to peel off the tape 3 starting from the tear-off portion 4. It should be understood that in other exemplary embodiments, the adhesive strength between the tear-off portion 4 and the battery cell body 1 can also be greater than 0.

[0030] In this exemplary embodiment, as Figure 1 , 2 As shown, the adhesive strength between tape 3 and tab 2 can be 1.5 N / cm to 2.8 N / cm. For example, the adhesive strength between tape 3 and tab 2 can be equal to 1.5 N / cm, 1.6 N / cm, 1.7 N / cm, 1.8 N / cm, 1.9 N / cm, 2 N / cm, 2.1 N / cm, 2.2 N / cm, 2.3 N / cm, 2.4 N / cm, 2.5 N / cm, 2.6 N / cm, 2.7 N / cm, 2.8 N / cm, etc. If the adhesive strength between tape 3 and tab 2 is too high, tape 3 will be difficult to tear off tab 2; if the adhesive strength between tape 3 and tab 2 is too low, tape 3 will easily detach from tab 2, thus affecting the insulation and fixation of tab 2. This exemplary embodiment sets the bonding strength between the tape 3 and the tab 2 to an appropriate value, which can reduce the risk of the tape 3 falling off and at the same time make it easy to tear off the tape 3.

[0031] In this exemplary embodiment, as Figure 1 , 2 As shown, the tear-off portion 4 and the tape 3 are integrally formed. For example, the tear-off portion 4 can be the portion of the tape substrate that is not coated with adhesive. It should be understood that in other exemplary embodiments, the tear-off portion 4 and the tape 3 can also be separate components. For example, the tear-off portion 4 can be adhered to the tape 3.

[0032] In this exemplary embodiment, as Figure 1 , 2 As shown, the tear-off portion 4 is connected to the end of the second adhesive portion 32 away from the first adhesive portion 31. This arrangement facilitates the grippers tearing the tape 3 starting from the tear-off portion 4.

[0033] In this exemplary embodiment, as Figure 1 , 2 As shown, the second adhesive portion 32 is connected to a tear-off portion 4. It should be understood that in other exemplary embodiments, such as Figure 3 The diagram shown is a structural schematic of a battery cell in another exemplary embodiment of the battery disclosed herein. The battery may include multiple tear-off portions 4, which are connected to the end of the second adhesive portion 32 away from the first adhesive portion 31, and the multiple tear-off portions 4 connected to the same second adhesive portion 32 are spaced apart. The multiple tear-off portions 4 make it easier for the grippers to grasp the starter.

[0034] In this exemplary embodiment, as Figure 3 As shown, the second adhesive portion 32 is connected to two tear-off portions 4. It should be understood that in other exemplary embodiments, the second adhesive portion 32 may also be connected to other numbers of tear-off portions 4.

[0035] In this exemplary embodiment, as Figure 1 , 2 As shown in Figure 3, the second adhesive portion 32 includes a first side 321 away from the first adhesive portion 31, and the easy-tear portion 4 is at least partially connected to the end of the first side 321. This arrangement facilitates the easy-tear portion 4 to be torn off the tape 3 starting from the end of the first side 321.

[0036] In this exemplary embodiment, as Figure 1 , 2 As shown in Figure 3, the battery cell includes two tabs 2: a positive tab and a negative tab. Correspondingly, the battery includes two pieces of adhesive tape 3, which are respectively bonded to the positive tab and the negative tab.

[0037] It should be noted that a battery comprises a cell and an electrolyte, and is the smallest unit capable of electrochemical reactions such as charging and discharging. A cell refers to a unit formed by winding or laminating stacked portions, which include a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarities of the first and second electrodes can be interchanged. Both the first and second electrodes are coated with active materials.

[0038] In this exemplary embodiment, the battery can be a lithium-ion battery. It should be understood that in other exemplary embodiments, the battery can also be a nickel-cadmium battery, a nickel-metal hydride battery, a lithium polymer battery, a sodium-ion battery, a solid-state battery, etc.

[0039] In this exemplary embodiment, the battery can be a square battery, that is, the battery can be a square prism battery. A square prism battery mainly refers to a prism shape, but it is not strictly limited that each side of the prism must be a straight line in a strict sense, and the corners between the sides are not necessarily right angles, but can be rounded.

[0040] The battery can be a wound battery, which is a core obtained by winding a first electrode, a second electrode with the opposite electrical charge to the first electrode, and a separator between the first and second electrodes.

[0041] The battery can be a stacked battery, which is not only convenient to assemble, but also allows for the production of longer batteries. Specifically, the cell is a stacked cell, which has a first electrode, a second electrode with the opposite electrical charge to the first electrode, and a separator between the first and second electrodes, thereby stacking multiple pairs of first and second electrodes to form a stacked cell.

[0042] In this exemplary embodiment, the battery device is a battery module or a battery pack.

[0043] The battery module includes multiple batteries, which can be prismatic batteries. The battery module may also include end plates and side plates for fixing the multiple batteries.

[0044] The battery pack consists of multiple batteries and a housing, which is used to hold the multiple batteries in place.

[0045] It should be noted that the battery pack includes batteries, and there can be multiple batteries housed within the casing. Alternatively, the multiple batteries can be assembled into a battery module and then installed within the casing. Or, the multiple batteries can be directly housed within the casing, meaning there is no need to group them together; the casing itself can be used to secure the batteries.

[0046] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0047] The accompanying drawings in this disclosure only illustrate the structures involved in this disclosure; other structures can be referred to with common design. Unless otherwise specified, the embodiments and features described in these embodiments can be combined to obtain new embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

[0048] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is defined only by the appended claims.

Claims

1. A battery, characterized in that: The battery comprises: A battery cell, the battery cell comprising: A battery cell body (1), the battery cell body (1) comprising a first side surface (11) and a second side surface (12), the first side surface (11) being the largest side surface (11) of the battery cell body (1), and the second side surface (12) intersecting with the first side surface (11); A pole ear (2) connected to one side of the battery cell body on the second side surface (12); An adhesive tape (3), the adhesive tape (3) comprising a first adhesive portion (31) and a second adhesive portion (32), the first adhesive portion (31) being bonded to the tab (2), and the second adhesive portion (32) being bonded to the first side surface (11); The easy-tear portion (4) is connected to the second adhesive portion (32), and the adhesive strength between the easy-tear portion (4) and the battery cell body is smaller than the adhesive strength between the adhesive tape (3) and the battery cell body (1).

2. The battery according to claim 1, characterized in that The easy-tear portion (4) is attached to the first side surface (11).

3. The battery according to claim 1, characterized in that The bonding strength between the easy-to-tear portion (4) and the battery cell body (1) is 0.

4. The battery according to claim 1, characterized in that The bonding strength between the adhesive tape (3) and the tab (2) is 1.5 N / cm-2.8 N / cm.

5. The battery according to claim 1, characterized in that The easy-tear portion (4) and the adhesive tape (3) are integrally arranged, or the easy-tear portion (4) and the adhesive tape (3) are separately arranged.

6. The battery according to any one of claims 1 to 5, characterized in that: The easy-to-tear portion (4) is connected to an end of the second adhesive portion (32) away from the first adhesive portion (31).

7. The battery according to claim 6, characterized in that The battery comprises a plurality of the easy-to-tear portions (4), wherein the plurality of the easy-to-tear portions (4) are connected to an end of the second adhesive portion (32) away from the first adhesive portion (31), and the plurality of the easy-to-tear portions (4) connected to the same second adhesive portion (32) are arranged at intervals.

8. The battery according to claim 6, characterized in that The second adhesive portion (32) comprises a first side edge (321) away from the first adhesive portion (31), and the easy-tear portion (4) is at least partially connected to an end portion of the first side edge (321).

9. The battery according to any one of claims 1 to 5, characterized in that: The battery is a quadrangular prism battery.

10. A battery device, characterized in that: The battery device comprises the battery according to any one of claims 1 to 9.

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