Battery cell assembly, battery and electric equipment

Abstract

The utility model discloses a battery cell assembly, a battery and electric equipment, the battery cell assembly comprises a plurality of battery cells, and each battery cell comprises a battery cell body and a tab extending out of the battery cell body; at least one part of the switching piece is positioned between the two tabs, which are close to each other, on the two adjacent battery cells, and the switching piece is used for connecting the two tabs, which are close to each other, on the two adjacent battery cells; the insulating rubber tape is arranged on at least one side of the connection position of the adapter plate and the tab, the insulating rubber tape is provided with a first area, a second area and a third area, the first area is bonded with the battery cell body through a first bonding layer, at least one part of the second area corresponds to the tab, and the third area is connected with the second area through a second bonding layer. And the third area is bonded with the adapter sheet through a second bonding layer, and the second area is non-viscous. The battery cell assembly disclosed by the utility model has the advantage of high safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery core assembly, a battery and an electrical device. Background Art

[0002] In the existing battery production process, such as the square battery production process, the connection position of the connector and the tab is usually protected by adhesive tape to prevent the structure of the connection position from affecting the battery. For example, after ultrasonic welding, the weld mark is protected by adhesive tape to prevent welding slag from falling and causing a short circuit in the winding core. However, the tape in the prior art is easy to pull the tab, for example, during the process of the adapter core assembly, the tape is easy to pull the tab and cause the tab to tear. Utility Model Content

[0003] One purpose of the utility model is to provide a battery core assembly, which can at least solve the technical problem of the tape pulling the tab in the prior art.

[0004] Another object of the present invention is to provide a battery, comprising the above-mentioned battery cell assembly.

[0005] Another object of the present utility model is to provide an electrical device, comprising the above-mentioned battery.

[0006] In order to achieve the above objectives, the utility model provides the following technical solutions.

[0007] According to the first aspect of the utility model, the battery cell assembly includes: a plurality of battery cells, each of the battery cells includes a battery cell body and a pole lug extending out of the battery cell body; a transfer plate, at least a portion of the transfer plate is located between two pole lugs close to each other on two adjacent battery cells, and the transfer plate is used to connect the two pole lugs close to each other on two adjacent battery cells; an insulating tape, the insulating tape is arranged on at least one side of the position where the transfer plate and the pole lug are connected, and a first region, a second region and a third region are provided on the insulating tape, the first region is bonded to the battery cell body through a first adhesive layer, at least a portion of the second region corresponds to the pole lug, the third region is bonded to the transfer plate through a second adhesive layer, and the second region is non-sticky.

[0008] Optionally, the first adhesive layer and / or the second adhesive layer is provided on the insulating tape.

[0009] Optionally, the adapter plate is welded to the pole tab, and a region where the adapter plate and the pole tab are welded has a weld mark, and the second adhesive layer covers the weld mark.

[0010] Optionally, the battery cell body has an outer side surface and an end surface, the outer side surface is an annular surface, and the opening of the annular surface is connected to the end surface, the electrode tab extends out of the end surface, and the first adhesive layer is connected to the end surface and / or the outer side surface.

[0011] Optionally, the outer side surface includes two first side surfaces and two second side surfaces, the two first side surfaces are arranged opposite to each other, the two second side surfaces are arranged opposite to each other, one end of each first side surface is connected to one second side surface, and the other end is connected to another second side surface, the area of ​​the first side surface is larger than the area of ​​the second side surface, and the first adhesive layer is connected to the first side surface.

[0012] Optionally, the insulating tape includes: a first segment, the first segment is connected to the battery body through the first adhesive layer; a second segment, one end of the second segment is connected to the other end of the first segment, the second segment corresponds to the pole ear, and the second segment is spaced apart from at least a portion of the pole ear; a third segment, one end of the third segment is connected to the other end of the second segment, and the third segment is connected to the adapter through the second adhesive layer.

[0013] Optionally, the second segment is arranged to be inclined relative to the first segment and / or the third segment.

[0014] Optionally, the first section includes: a first limb, the first limb is connected to the first side surface through the first adhesive layer; a second limb, the second limb is connected to the end surface through the first adhesive layer, one end of the first limb is connected to one end of the second limb, and there is an angle between the extension direction of the first limb and the extension direction of the second limb.

[0015] A battery according to an embodiment of the second aspect of the utility model comprises any of the above-mentioned battery cell assemblies.

[0016] The electrical equipment according to the third aspect of the present invention comprises any one of the above-mentioned batteries.

[0017] According to the battery cell assembly of the embodiment of the utility model, it includes: a plurality of battery cells, a transfer sheet and an insulating tape. On the one hand, the insulating tape is arranged on at least one side of the position where the transfer sheet and the pole ear are connected, and the area where the pole ear and the transfer sheet are connected can be protected by adhesive to prevent the structure of the connection area from affecting the safety performance of the battery cell, such as welding marks damaging the battery cell, and welding slag falling causing the battery cell to short-circuit. On the other hand, the second area is a non-sticky area, which can prevent the insulating tape from pulling the pole ear and reduce the probability of the pole ear tearing. For example, the battery cell body is a winding core, and the middle area of ​​the insulating tape is not sticky. One end of the insulating tape is connected to the end face and large surface of the winding core, and the other end is bonded to the transfer sheet, which can alleviate the situation where the transfer sheet is easy to pull the pole ear during the core closing process, causing the pole ear to tear. In this embodiment, by setting the second area as a non-sticky area, the problem of the insulating tape pulling the pole ear, causing the pole ear to tear and fall into the battery cell can be avoided, thereby improving the quality and safety of the battery.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 A structural schematic diagram of a battery cell assembly according to an embodiment of the utility model from one perspective;

[0021] Figure 2 A top view of an insulating tape according to an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a battery cell assembly from another perspective according to an embodiment of the utility model.

[0023] Reference Numbers

[0024] Battery cell assembly 100;

[0025] Battery cell 10;

[0026] Cell body 11; first side surface 111; second side surface 112; end surface 113;

[0027] Tab 12;

[0028] Adapter 20;

[0029] Insulation tape 30;

[0030] First segment 31; first region 311; first limb 312; second limb 313;

[0031] The second segment 32; the second region 321;

[0032] A third section 33 ; a third region 331 . DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0036] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0037] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] The battery cell assembly 100 according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 3 As shown, the battery cell assembly 100 according to the embodiment of the present utility model includes: a plurality of battery cells 10 , a transfer sheet 20 and an insulating tape 30 .

[0040] Specifically, each battery cell 10 includes a battery cell body 11 and a pole ear 12 extending out from the battery cell body 11. At least a portion of the adapter 20 is located between two pole ears 12 that are close to each other on two adjacent battery cells 10. The adapter 20 is used to connect the two pole ears 12 that are close to each other on two adjacent battery cells 10. The insulating tape 30 is arranged on at least one side of the position where the adapter 20 and the pole ear 12 are connected. For example, the thickness direction of the adapter 20 is the up and down direction, and the thickness direction of the pole ear 12 is also the up and down direction. After the adapter 20 and the pole ear 12 are welded, the insulating tape 30 can be located above the welding position or below the welding position. Two insulating tapes 30 can also be used and arranged above and below the welding position at the same time. The specific design can be based on the welding mark position.

[0041] The insulating tape 30 is provided with a first area 311, a second area 321 and a third area 322. The first area 311 is bonded to the battery cell body 11 through a first adhesive layer, at least a portion of the second area 321 corresponds to the pole ear 12, the third area 322 is bonded to the adapter sheet 20 through a second adhesive layer, and the second area 321 is non-sticky.

[0042] In other words, the battery cell assembly 100 according to the embodiment of the utility model is mainly composed of multiple battery cells 10, a transfer sheet 20 and an insulating tape 30, wherein each battery cell 10 may include a battery cell body 11 and a pole ear 12, and the pole ear 12 may extend out of the end of the battery cell body 11.

[0043] Among them, the adapter 20 can realize the connection between two adjacent battery cells 10 that are close to each other. For example, there are two battery cells 10, which are specifically divided into a first battery cell located on the left and a second battery cell located on the right. The pole ear 12 on the right end of the first battery cell is spaced apart from the pole ear 12 on the left side of the second battery cell, and the two are connected through the adapter 20.

[0044] Moreover, an insulating tape 30 is provided on at least one side of the position where the adapter 20 and the tab 12 are connected. For example, the thickness directions of the adapter 20 and the tab 12 are respectively in the up and down directions, and the insulating tape 30 is provided on the upper side and / or the lower side of the connection area between the adapter 20 and the tab 12.

[0045] Specifically, the insulating tape 30 is provided with a first area 311, a second area 321 and a third area 322. For example, the insulating tape 30 extends in the left-right direction, and the first area 311, the second area 321 and the third area 322 are arranged in sequence in the left-right direction, and the second area 321 is located between the first area 311 and the third area 322.

[0046] The first region 311 is bonded to the cell body 11 through the first adhesive layer to achieve the connection between the insulating tape 30 and the cell body 11. At least a portion of the second region 321 corresponds to the tab 12, for example, the second region 321 exceeds the outer edge of the tab 12. The third region 322 is bonded to the adapter 20 through the second adhesive layer to achieve the connection between the insulating tape 30 and the adapter 20. In addition, the third region 322 can also prevent the tab 12 from being torn and the broken tab 12 from being inserted into the cell 10 to cause a short circuit.

[0047] It should be noted that in this embodiment, the position of the first adhesive layer and / or the second adhesive layer before bonding is not limited. The first adhesive layer can be located on the insulating tape 30 or on the battery cell body 11, and the second adhesive layer can be located on the insulating tape 30 or on the adapter 20.

[0048] In this embodiment, the battery cell assembly 100 according to the embodiment of the utility model includes: a plurality of battery cells 10, a transfer sheet 20 and an insulating tape 30. On the one hand, the insulating tape 30 is arranged on at least one side of the position where the transfer sheet 20 and the pole ear 12 are connected, and the area where the pole ear 12 and the transfer sheet 20 are connected can be protected by adhesive to prevent the structure of the connection area from affecting the safety performance of the battery cell 10, such as welding marks damaging the battery cell 10, and welding slag falling causing the battery cell 10 to short-circuit. On the other hand, the second area 321 is a non-sticky area, which can prevent the insulating tape 30 from pulling the pole ear 12 and reduce the probability of the pole ear 12 being torn. For example, the battery cell body 11 is a winding core, and the middle area of ​​the insulating tape 30 is not sticky. One end of the insulating tape 30 is connected to the end face 113 and the large face of the winding core, and the other end is bonded to the transfer sheet 20, which can alleviate the situation where the transfer sheet 20 is easy to pull the pole ear 12 during the core closing process, causing the pole ear 12 to tear. In this embodiment, by setting the second area 321 as a non-sticky area, the problem of the insulating tape 30 pulling the tab 12 and causing the tab 12 to tear and fall into the battery cell 10 can be avoided, thereby improving the quality and safety of the battery.

[0049] According to one embodiment of the utility model, the first adhesive layer and / or the second adhesive layer is arranged on the insulating tape 30. When the insulating tape 30 is covered on the structure to be connected, the connection between the insulating tape 30 and the battery cell body 11 or the adapter 20 can be quickly achieved, thereby reducing the installation process and improving the assembly efficiency.

[0050] In some specific embodiments of the present invention, the adapter 20 is welded to the tab 12, for example, the adapter 20 and the tab 12 are welded by ultrasonic welding. In this embodiment, the adapter 20 is welded to the tab 12, which improves the connection firmness and convenience of the adapter 20 and the tab 12. The second adhesive layer covers at least a portion of the area welded between the adapter 20 and the tab 12, for example, after ultrasonic welding, the weld mark is protected by adhesive. In this embodiment, by covering at least a portion of the area welded between the adapter 20 and the tab 12 with the second adhesive layer, it is possible to prevent the welding slag in the welding area from falling and causing the battery cell 10 to short-circuit.

[0051] According to one embodiment of the utility model, the area where the adapter sheet 20 is welded to the tab 12 has a weld mark, and the second adhesive layer covers the weld mark. For example, during the production process of square batteries, the weld mark is covered by the second adhesive layer, which can effectively prevent welding slag from falling and causing a short circuit in the core.

[0052] According to one embodiment of the utility model, the battery cell body 11 has an outer side surface and an end surface 113, the outer side surface is an annular surface, and the opening of the annular surface is connected to the end surface 113, for example, the left side of the outer side surface has an opening, and the end surface 113 is located at the opening position. In addition, the pole ear 12 extends out of the end surface 113, and the first adhesive layer connects the end surface 113 and / or the outer side surface, which is conducive to the rapid connection between the insulating tape 30 and the battery cell body 11. In addition, by covering at least a portion of the end surface 113 and / or the outer side surface with the insulating tape 30, it is also possible to avoid the broken pole ear 12 from being inserted into the battery cell 10 when the pole ear 12 is torn to cause a short circuit.

[0053] In some specific embodiments of the present invention, the outer side surface includes two first side surfaces 111 and two second side surfaces 112, the two first side surfaces 111 are arranged opposite to each other, the two second side surfaces 112 are arranged opposite to each other, one end of each first side surface 111 is connected to one second side surface 112, and the other end is connected to another second side surface 112, the area of ​​the first side surface 111 is larger than the area of ​​the second side surface 112, and the first adhesive layer is connected to the first side surface 111. In other words, the insulating tape 30 is connected to the large surface of the battery body 11, the connection area is large, and the connection is strong.

[0054] According to an embodiment of the utility model, before the insulating tape 30, the battery cell 10 and the adapter 20 are assembled, the insulating tape 30 is in the shape of a long strip, and the first area 311, the second area 321 and the third area 322 are sequentially arranged along the length direction of the insulating tape 30. For example, the insulating tape 30 extends in the left-right direction, the first area 311 is located on the left side of the second area 321, and the third area 322 is located on the right side of the second area 321. In this embodiment, by adopting the insulating tape 30 in the shape of a long strip, and sequentially arranging the first area 311, the second area 321 and the third area 322 along the length direction of the insulating tape 30, it is convenient to process the insulating tape 30, and can be combined with the arrangement characteristics of the battery cell body 11, the tab 12 and the adapter 20. The insulating tape 30 is a flexible part. During assembly, the first area 311, the second area 321 and the third area 322 automatically correspond to the corresponding structure, thereby improving the convenience and firmness of the insulating tape 30 connecting the adapter 20 and the battery cell body 11.

[0055] According to one embodiment of the utility model, the insulating tape 30 includes: a first segment 31, a second segment 32 and a third segment 33, the first segment 31 is connected to the battery body 11 through a first adhesive layer, one end of the second segment 32 is connected to the other end of the first segment 31, the second segment 32 corresponds to the pole ear 12, the second segment 32 is spaced apart from at least a part of the pole ear 12, one end of the third segment 33 is connected to the other end of the second segment 32, and the third segment 33 is connected to the adapter 20 through a second adhesive layer.

[0056] In this embodiment, the second segment 32 corresponds to the tab 12 , and the second segment 32 is spaced apart from at least a portion of the tab 12 , which can further prevent the insulating tape 30 from pulling the tab 12 and causing the tab 12 to tear.

[0057] In some specific embodiments of the present invention, the second segment 32 is tilted relative to the first segment 31 and / or the third segment 33. It can be understood that the outer side surface and the end surface 113 have spatial position differences, for example, the length direction of the outer side surface extends along the X-axis direction, the height direction of the end surface 113 extends along the Z-axis direction, the tab 12 extends along the X-axis direction, and the tab 12, the end surface 113 and the outer side surface have position differences in three-dimensional space. The corresponding first segment 31 and the third segment 33 are also prone to have spatial position differences. Therefore, in this embodiment, by adopting the second segment 32 to be tilted, it is beneficial for the second segment 32 to connect the first segment 31 and the third segment 33 located at different heights.

[0058] According to an embodiment of the utility model, the first segment 31 includes: a first limb 312 and a second limb 313, the first limb 312 is connected to the first side surface 111 through the first adhesive layer, the second limb 313 is connected to the end surface 113 through the first adhesive layer, one end of the first limb 312 is connected to one end of the second limb 313, and an angle is formed between the extension direction of the first limb 312 and the extension direction of the second limb 313. In this embodiment, by connecting the first segment 31 to the end surface 113 of the battery cell 10 and the large surface of the battery cell 10 at the same time, the connection firmness between the insulating tape 30 and the battery cell 10 can be improved.

[0059] The present invention further provides a battery, which includes the battery cell assembly 100 in any of the above embodiments. Since the battery cell assembly 100 has the advantage of high safety, the battery in the embodiment of the present invention also has the same advantage, which will not be elaborated here.

[0060] The utility model also provides an electric device, which includes a battery in any of the above embodiments. The electric device includes a battery in any of the above embodiments. Since the battery has the advantage of high safety, the electric device in the utility model embodiment also has the same advantage, which will not be described in detail here.

[0061] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery cell assembly (100), characterized in that: include: A plurality of battery cells (10), each of the battery cells (10) comprising a battery cell body (11) and a tab (12) extending out of the battery cell body (11); A transfer sheet (20), at least a portion of which is located between two mutually adjacent pole ears (12) on two adjacent battery cells (10), and the transfer sheet (20) is used to connect the two mutually adjacent pole ears (12) on two adjacent battery cells (10); An insulating tape (30), wherein the insulating tape (30) is arranged on at least one side of the position where the adapter (20) and the pole ear (12) are connected, and a first region (311), a second region (321) and a third region (331) are provided on the insulating tape (30), wherein the first region (311) is bonded to the battery cell body (11) through a first adhesive layer, at least a portion of the second region (321) corresponds to the pole ear (12), and the third region (331) is bonded to the adapter (20) through a second adhesive layer, and the second region (321) is non-sticky.

2. The battery cell assembly (100) according to claim 1, characterized in that: The first adhesive layer and / or the second adhesive layer are provided on the insulating tape (30).

3. The battery cell assembly (100) according to claim 1, characterized in that: The adapter plate (20) is welded to the pole tab (12), and a welding mark is formed in the area where the adapter plate (20) and the pole tab (12) are welded, and the second adhesive layer covers the welding mark.

4. The battery cell assembly (100) according to claim 1, characterized in that: The battery cell body (11) has an outer side surface and an end surface (113); the outer side surface is an annular surface, and the opening of the annular surface is connected to the end surface (113); the pole ear (12) extends out of the end surface (113); and the first adhesive layer is connected to the end surface (113) and / or the outer side surface.

5. The battery cell assembly (100) according to claim 4, characterized in that: The outer side surface comprises two first side surfaces (111) and two second side surfaces (112); the two first side surfaces (111) are arranged opposite to each other, and the two second side surfaces (112) are arranged opposite to each other; one end of each first side surface (111) is connected to one second side surface (112), and the other end is connected to another second side surface (112); the area of ​​the first side surface (111) is greater than the area of ​​the second side surface (112); and the first adhesive layer is connected to the first side surface (111).

6. The battery cell assembly (100) according to claim 5, characterized in that: The insulating tape (30) comprises: A first section (31), wherein the first section (31) is connected to the battery cell body (11) via the first adhesive layer; a second segment (32), one end of the second segment (32) being connected to the other end of the first segment (31), the second segment (32) corresponding to the pole lug (12), and the second segment (32) being spaced apart from at least a portion of the pole lug (12); A third segment (33), one end of the third segment (33) is connected to the other end of the second segment (32), and the third segment (33) is connected to the adapter sheet (20) via the second adhesive layer.

7. The battery cell assembly (100) according to claim 6, characterized in that: The second segment (32) is arranged to be inclined relative to the first segment (31) and / or the third segment (33).

8. The battery cell assembly (100) according to claim 7, characterized in that: The first section (31) comprises: A first limb (312), the first limb (312) being connected to the first side surface (111) via the first adhesive layer; A second limb (313), wherein the second limb (313) is connected to the end surface (113) via the first adhesive layer, one end of the first limb (312) is connected to one end of the second limb (313), and an angle is formed between an extension direction of the first limb (312) and an extension direction of the second limb (313).

9. A battery, characterized in that: It comprises the battery cell assembly (100) described in any one of claims 1 to 8.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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