CN220474817U - Battery cell assembly and battery - Google Patents

Abstract

The application discloses a battery cell assembly and a battery. The cell assembly includes a cell component and an insulating fixing strap. The battery core component comprises at least two battery cores which are arranged side by side, the battery core component comprises a bottom end face, a first side face and a second side face, the first side face and the second side face are perpendicular to the bottom end face, and the first side face and the second side face are respectively positioned on two opposite sides of the battery core component; the insulating fixing belt comprises a first strip-shaped part and a second strip-shaped part, the first strip-shaped part is adhered to and covers the bottom end face, the second strip-shaped part is connected with the first strip-shaped part and perpendicular to the first strip-shaped part, and the second strip-shaped part is adhered and fixed on the first side face and/or the second side face and covers a gap between two adjacent electric cores. The battery cell assembly and the battery can solve the problems that the thickness of the battery cell is easy to increase and the capacity of the battery is easy to reduce in a fixing mode among a plurality of battery cells in the prior art.

Description

Battery cell assembly and battery

Technical Field

The application relates to the technical field of charge and discharge devices, in particular to a battery cell assembly and a battery.

Background

With the rapid development of consumer electronic products, the mobile phone battery is increased in capacity, and simultaneously, the battery is charged rapidly, high in power and power consumption, and the battery cells of the battery are replaced by two or more blocks. When in actual use, the multiple battery cores can be connected in series and parallel according to the needs.

At present, a mode of winding insulating adhesive paper in the thickness direction of the battery cells is generally adopted for fixing a plurality of battery cells, and in the fixing mode, the thickness of an overlapped part of the insulating adhesive paper is relatively thick, so that the capacity of a battery is easily reduced, and the overall thickness of the battery cells is easily increased.

Disclosure of Invention

The main aim of the application is to provide a battery cell assembly and a battery, so as to solve the problems that the thickness of the battery cell is easy to increase and the capacity of the battery is easy to reduce in a fixing mode among a plurality of battery cells in the prior art.

According to one aspect of the present application, there is provided a cell assembly comprising:

the battery cell component comprises at least two battery cells arranged side by side, the battery cell component comprises a bottom end face, a first side face and a second side face, the first side face and the second side face are perpendicular to the bottom end face, and the first side face and the second side face are respectively positioned on two opposite sides of the battery cell component; and

the insulating fixing belt comprises a first strip-shaped part and a second strip-shaped part, the first strip-shaped part is adhered to and covers the bottom end face, the second strip-shaped part is connected with the first strip-shaped part and perpendicular to the first strip-shaped part, and the second strip-shaped part is adhered to and fixed on the first side face and/or the second side face and covers a gap between two adjacent electric cores.

Further, the insulating fixing band comprises insulating gummed paper.

Further, the insulating gummed paper comprises a weak gummed part or a non-gummed part, and the weak gummed part or the non-gummed part is opposite to the gap.

Further, in the X direction, the width H2 of the weak glue portion or the glue-free portion is not smaller than the width H1 of the slit.

Further, the weak glue portion includes perforations; and/or the number of the groups of groups,

the weak glue part comprises at least one section of glue-free area; and/or the number of the groups of groups,

the weak glue part comprises a plurality of glue points, and a glue-free gap area is arranged between two adjacent glue points.

Further, a back adhesive layer is arranged on one side, away from the electric core component, of the second strip-shaped part.

Further, the first strip-shaped portion includes an extension section that extends toward the side surface of the cell element connected to the bottom end surface and is adhesively fixed to the side surface of the cell element connected to the bottom end surface.

Further, when the first strip-shaped portion and the second strip-shaped portion are unfolded in the same plane, the insulating fixing strap comprises at least one cross shape or at least one T shape.

Further, the insulating fixing band comprises a PI band or a PET band.

On the other hand, the application also provides a battery, which comprises the battery cell assembly.

In the electric core assembly of this application, through insulating fixed band with two piece at least electric core fixed connection together, the equipment simple process, the in-process of bonding fixed electric core part, insulating fixed band does not have the overlapping position, is difficult to increase electric core assembly's thickness, can optimize electric core assembly's thickness direction (the direction of first side to second side) space utilization. In addition, the bottom end surface of the battery cell component is completely covered by the insulating fixing belt, so that a good insulating effect can be achieved, and the capacity of the battery cell component can be maintained to a certain extent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a front view of an insulating fixing band of a battery cell assembly according to an embodiment of the present disclosure when the insulating fixing band is just adhered to a battery cell component;

fig. 2 is a front view of a battery cell assembly according to an embodiment of the present disclosure;

fig. 3 is a rear view of a battery cell assembly according to an embodiment of the present disclosure;

fig. 4 is a front view of a battery cell disclosed in an embodiment of the present application;

fig. 5 is a front view of an alternative embodiment of the disclosed insulating fastening tape of a battery cell assembly as it is being adhered to a battery cell component;

fig. 6 is a perspective view of another electrical core assembly according to an embodiment of the present disclosure;

fig. 7 is a front view of another battery cell assembly disclosed in an embodiment of the present application;

fig. 8 is a rear view of another battery cell assembly disclosed in an embodiment of the present application;

fig. 9 is a schematic structural view of an insulating fixing band adhered to a cell component according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of the insulation fixing strap of FIG. 9 when deployed;

FIG. 11 is a schematic view of another insulating fastening strap (with two cross shapes) according to an embodiment of the present disclosure when deployed;

fig. 12 is a schematic view of another insulation fixing strap (with a cross-shaped and weak glue portion) according to an embodiment of the present disclosure when being unfolded;

fig. 13 is a schematic view of another insulation fixing strap (with two cross-shaped and weak glue portions) according to an embodiment of the present disclosure when being unfolded;

fig. 14 is a schematic view of another insulation fixing strap (with a cross-shaped, weak glue portion and backing glue layer) according to the embodiment of the present application;

fig. 15 is a schematic structural view of another insulating fixing band (with two cross-shaped, weak glue portions and a backing adhesive layer) according to an embodiment of the present disclosure;

fig. 16 is a structural view of another insulating fixing band according to the embodiment of the present application, which is formed by bonding the insulating fixing band to the cell unit;

FIG. 17 is a schematic view of the insulation fixing strap of FIG. 16 when deployed;

FIG. 18 is a schematic view of another insulating fastening strap (with two T-shapes) according to an embodiment of the present disclosure when deployed;

fig. 19 is a schematic view of another insulation fixing strap (with a T-shape and a weak glue portion) according to an embodiment of the present disclosure when being unfolded;

fig. 20 is a schematic structural view of another insulating fixing band (with two T-shaped and weak glue portions) according to an embodiment of the present disclosure when being unfolded.

Wherein the above figures include the following reference numerals:

10. a cell component; 11. a battery cell; 12. a slit; 101. a bottom end surface; 102. a first side; 103. a second side; 20. an insulating fixing band; 21. a first strip-shaped portion; 211. an extension section; 22. a second strip-shaped portion; 221. a weak glue part; 222. and (5) a back adhesive layer.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1 to 8, according to an embodiment of the present application, there is provided a cell assembly including a cell unit 10 and an insulating fixing tape 20.

The cell component 10 includes at least two cells 11 arranged side by side, the cell component 10 includes a bottom end surface 101, a first side surface 102 and a second side surface 103, the first side surface 102 and the second side surface 103 are perpendicular to the bottom end surface 101, and the first side surface 102 and the second side surface 103 are respectively located at two opposite sides of the cell component 10; the insulating fixing band 20 includes a first bar-shaped portion 21 and a second bar-shaped portion 22, the first bar-shaped portion 21 is adhered to and covers the bottom end surface 101, the second bar-shaped portion 22 is connected with the first bar-shaped portion 21 and is perpendicular to the first bar-shaped portion 21, and the second bar-shaped portion 22 is adhered to and fixed to the first side surface 102 and/or the second side surface 103 and covers the gap 12 between two adjacent cells 11. It is to be understood that "the second strip portion 22 is adhesively secured to the first side 102 and/or the second side 103" as described herein means: the second strip portion 22 may be bonded to the first side surface 102, the second side surface 103, or both the first side surface 102 and the second side surface 103.

Specifically, the cell unit 10 in the present embodiment may include two cells 11 (see fig. 1 to 3 and 6 to 8), may include three cells 11 (see fig. 5), and may include more than three cells 11. In the embodiment, the battery cells 11 are arranged in a rectangular parallelepiped, and when the battery cell assembly is actually assembled, the first strip-shaped portion 21 of the insulating fixing strap 20 is adhered and fixed to the bottom end surface 101 of the battery cell member 10 assembled by at least two battery cells 11 and covers the bottom end surface 101, and at this time, the first strip-shaped portion 21 can fixedly connect at least two battery cells 11 together from the bottom end surface 101 of the battery cell member 10. At the same time, the second strip 22 is adhesively secured to the first side 102 and/or the second side 103 of the cell element 10 and covers the gap 12 between two adjacent cells 11, in which case the second strip 22 can adhesively secure two adjacent cells 11 together from the first side 102 and/or the second side 103.

In the electric core assembly, at least two electric cores 11 are fixedly connected together through the insulating fixing belt 20, the assembly process is simple, the insulating fixing belt 20 does not have an overlapped part in the process of bonding and fixing the electric core component 10, the thickness of the electric core assembly is not easy to increase, and the space utilization rate of the thickness direction (the direction from the first side surface 102 to the second side surface 103) of the electric core assembly can be optimized. In addition, the insulating fixing tape 20 completely covers the bottom end face 101 of the cell unit 10, thereby achieving a good insulating effect and maintaining the capacity of the cell unit to a certain extent.

Optionally, the insulating fixing band 20 in this embodiment includes insulating adhesive paper, where the insulating adhesive paper is a relatively thin insulating layer, and when the cells 11 are actually connected, adhesive is disposed on the insulating adhesive paper, and then the insulating adhesive paper is adhered and fixed between two adjacent cells 11, so that the cell component 10 can be fixed. The thickness of the insulating adhesive paper is not more than 10mm, so that the battery cell component 10 can be effectively fixed, and the overall thickness of the battery cell component is not easy to increase.

The insulating fixing tape 20 in the present embodiment may be a PI (polyimide) tape or a PET (polyethylene terephthalate, commonly known as polyester resin) tape, for example. PI is one of the varieties with the best heat resistance in the existing engineering plastics, and some varieties can bear the high temperature of 290 ℃ for a long time and 490 ℃ for a short time, and in addition, the mechanical property, fatigue resistance, flame resistance, dimensional stability and electrical property are all good, the molding shrinkage is small, the oil resistance, general acid and organic solvent are resistant to alkali, the abrasion resistance and the abrasion resistance are good, and the cell component 10 can be effectively fixed. PET is a milky or pale yellow highly crystalline polymer with a smooth and glossy surface. The PET has the advantages of good creep resistance, fatigue resistance, abrasion resistance and dimensional stability, small abrasion loss, high hardness, maximum toughness in thermoplastic plastics, good electrical insulation performance, small influence of temperature, poor corona resistance, capability of fixing the cell component 10 and good insulation performance. Of course, in other embodiments of the present application, the insulating fixing band 20 may be a rubber band, etc., and any other modifications under the concept of the present application are within the scope of the present application.

Further, the insulating adhesive paper in this embodiment includes a weak adhesive portion 221 or an adhesive-free portion (not shown in the figure), and the weak adhesive portion 221 or the adhesive-free portion is disposed opposite to the slit 12. It can be understood that the weak glue portion 221 in this embodiment refers to a portion of the insulating glue paper with weaker adhesion than other portions, and the non-glue portion refers to a portion of the insulating glue paper with no glue. In this embodiment, the weak glue portion 221 or the glue-free portion is disposed on the insulating glue paper, and the weak glue portion 221 or the glue-free portion is opposite to the gap 12 between the two adjacent cells 11, that is, at the gap 12, the insulating glue paper has no adhesion force or weak adhesion force with the cells 11, so that when the cell assembly is subjected to torsion, abnormal noise of the cell assembly can be improved or eliminated.

Alternatively, the width of the weak glue portion 221 or the glue-free portion is not smaller than the width of the slit 12 along the X direction, so that the adhesion force between the insulating glue paper at the slit 12 and the battery cell 11 can be effectively weakened. In the actual production process, the width of the weak glue portion 221 may be designed according to needs, which is not specifically limited in this application.

In the present application, the weak glue portion 221 may be formed in various manners, for example, the weak glue portion 221 includes a perforation, and the perforation is processed on the insulating glue paper at a position opposite to the slit 12, so that the adhesive force of the insulating glue paper at the position opposite to the slit 12 can be weakened, and the weak glue portion 221 can be formed; for another example, the weak glue portion 221 includes at least one section of glue-free area, that is, the structure of the application may be that the adhesive force of the part of the insulating glue paper opposite to the gap 12 can be weakened by arranging at least one section of glue-free area on the part of the insulating glue paper opposite to the gap 12, so that the weak glue portion 221 can be formed; for another example, the weak glue portion 221 includes a plurality of glue points, and a glue-free gap area is formed between two adjacent glue points, that is, the structure of the present application may also be used to glue the position opposite to the gap 12 on the insulating glue paper, and make the two adjacent glue points have glue-free gap areas, that is, no glue gap, so as to weaken the adhesive force of the position opposite to the gap 12 on the insulating glue paper, and further form the weak glue portion 221. Of course, in other embodiments of the present application, the weak glue portion 221 may be formed by changing the thickness of the glue on the insulating glue paper at the portion corresponding to the slit 12, and any other modification forms under the concept of the present application are within the scope of the present application.

Further, the second strip-shaped portion 22 in this embodiment is provided with a back adhesive layer 222 on a side facing away from the battery core 10, and the battery core assembly in this embodiment and the machine cabin structure for mounting the battery core assembly are conveniently fixed together by the action of the back adhesive layer 222, so as to improve the reliability of the battery. Alternatively, the first strip portion 21 and the second strip portion 22 in the present application may be integrally formed, or may be separately formed and then adhered together, so long as other deformation modes under the concept of the present application are all within the scope of the present application.

Further, the first bar-shaped portion 21 in the present embodiment includes an extension 211, and the extension 211 extends toward the side of the cell element 10 connected to the bottom end face 101 and is adhesively fixed to the side of the cell element 10 connected to the bottom end face 101. That is, the width and length of the first strip-shaped portion 21 in this embodiment are larger than the width and length of the bottom end surface 101 of the cell member 10, so that after the first strip-shaped portion 21 is adhered to the bottom end surface 101, the extension section 211 on the first strip-shaped portion 21 can be coated on the side surface of the cell member 10 contacting the bottom end surface 101, so that the fixing strength of the insulating fixing strap 20 to the cell member 10 can be further improved.

Referring to fig. 9 to 20, the insulating fixing band 20 includes at least one cross shape or at least one T shape when the first and second bar portions 21 and 22 are spread out in the same plane in the present embodiment. As shown in fig. 10 to 15, when the first strip-shaped portion 21 and the second strip-shaped portion 22 are spread out in the same plane, the insulating fixing band 20 may include a cross shape, or may include two or more cross shapes, so as to facilitate adhesion and fixing of more battery cells 11 together, and the second strip-shaped portion 22 is adhered to both the first side 102 and the second side 103 of the battery cell member 10. As shown in fig. 16 to 20, when the first and second bar portions 21 and 22 are spread out in the same plane, the insulating fixing band 20 may include one T-shape, or may include two or more T-shapes, so as to facilitate adhesion and fixing of more battery cells 11 together, and only one surface of the first and second side surfaces 102 and 103 of the battery cell member 10 is adhered with the second bar portion 22. The insulating adhesive paper in the shape of a cross and a T is generally in a U shape in the attached state, and the second strip-shaped part 22 acts on the front and back surfaces of the cell element 10 to perform fixing and insulating functions.

According to the above description, it can be known that the battery cell assembly of the present application can make the fixing between the battery cells and simultaneously give consideration to the insulation performance, and simultaneously reduce the space occupied by the structural insulation fixing belt 20 and improve the space utilization rate in the thickness direction of the battery cell assembly. The maximum benefit of the thickness of the battery core component is achieved under the condition of the same battery thickness, and meanwhile, the manufacturing process can be simplified, and the production efficiency is improved. Meanwhile, the battery cell assembly can improve and eliminate abnormal sounds generated when multiple serial-parallel batteries are subjected to torsion, the local double faced adhesive tape design can fix the battery pack, and the reliability of the batteries and the whole machine is improved.

On the other hand, the embodiment of the application also provides a battery, which comprises the battery cell assembly, so that the battery comprises all the technical effects of the battery cell assembly. Since the technical effects of the cell assembly have been described in detail in the foregoing, a detailed description thereof is omitted herein.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A cell assembly, comprising:

the battery cell component (10), the battery cell component (10) comprises at least two battery cells (11) which are arranged side by side, the battery cell component (10) comprises a bottom end face (101), a first side face (102) and a second side face (103), the first side face (102) and the second side face (103) are perpendicular to the bottom end face (101), and the first side face (102) and the second side face (103) are respectively positioned on two opposite sides of the battery cell component (10); and

the insulation fixing belt (20), the insulation fixing belt (20) comprises a first strip-shaped part (21) and a second strip-shaped part (22), the first strip-shaped part (21) is adhered to and covered on the bottom end face (101), the second strip-shaped part (22) is connected with the first strip-shaped part (21) and perpendicular to the first strip-shaped part (21), and the second strip-shaped part (22) is adhered to and fixed on the first side face (102) and/or the second side face (103) and covers gaps (12) between two adjacent electric cores (11).

2. The cell assembly of claim 1, wherein the insulating fixing strip (20) comprises insulating glue.

3. The cell assembly according to claim 2, wherein the insulating adhesive paper comprises a weak adhesive part (221) or an adhesive-free part, and the weak adhesive part (221) or the adhesive-free part is arranged opposite to the gap (12).

4. A cell assembly according to claim 3, wherein the width H2 of the weak glue portion (221) or the glue-free portion is not smaller than the width H1 of the slit (12) in the X-direction.

5. A cell assembly according to claim 3, wherein the weak glue portion (221) comprises perforations; and/or, the weak glue portion (221) comprises at least one section of glue-free area; and/or the number of the groups of groups,

the weak glue part (221) comprises a plurality of glue points, and a glue-free gap area is arranged between two adjacent glue points.

6. The cell assembly according to claim 1, characterized in that the side of the second strip-shaped part (22) facing away from the cell element (10) is provided with a backing adhesive layer.

7. The cell assembly according to claim 1, wherein the first strip-shaped part (21) comprises an extension (211), the extension (211) extending towards the side of the cell element (10) connected to the bottom end face (101) and being adhesively fixed to the side of the cell element (10) connected to the bottom end face (101).

8. The cell assembly according to any one of claims 1 to 7, wherein the insulating fixing band (20) comprises at least one cross shape or at least one T-shape when the first strip-shaped portion (21) and the second strip-shaped portion (22) are spread out in the same plane.

9. The cell assembly according to any of claims 1 to 7, wherein the insulating fixing band (20) comprises PI or PET band.

10. A battery characterized in that it comprises the cell assembly of any one of claims 1 to 9.