CN219591522U - Insulating film, battery and electric equipment - Google Patents

Abstract

The utility model relates to the field of batteries and discloses an insulating film, a battery and electric equipment, wherein the insulating film comprises a first diaphragm and at least one connecting part fixedly connected with a top cover of the battery; the connecting part is connected to the first edge of the first diaphragm, and the connecting part can be bent relative to the first diaphragm. The insulating film in the embodiment can effectively avoid deformation of the insulating film component which entirely covers the battery core due to the fact that the first film on one side is pulled.

Description

Insulating film, battery and electric equipment

Technical Field

The utility model relates to the field of batteries, in particular to an insulating film, a battery and electric equipment.

Background

At present, square battery, including casing, top cap, electric core and insulating piece, insulating piece cladding is then put into the casing with the electric core on the electric core to realize insulating separation between electric core and the casing.

The battery cell is generally transferred to the battery cell supporting plate through a manipulator, and the manipulator generally comprises a first clamping arm and a second clamping arm, wherein a protruding part is arranged on one of the first clamping arm and the second clamping arm so as to better clamp the battery cell.

The insulating sheet in the prior art is of an integrated structure and comprises a top connecting sheet and large-surface cladding sheets connected to two opposite side edges of the top connecting sheet; after the insulating sheet is coated on the battery cell, when the manipulator is clamped on the battery cell, the bulge on the manipulator can lead to deformation of the large-area coating sheet on one side, and as the existing insulating sheet is integrally formed, the large-area coating sheet on one side can pull the large-area coating sheet on the other side to deform and crumple after deforming, and once the situation occurs, the problems can be caused: (1) The large-surface coating sheet cannot completely coat the large surface of the battery core, so that the battery core and the shell are in large contact to cause the risk of short circuit of the battery; (2) The deformed parts of the large-surface cladding sheets on the two sides are easy to scratch with the shell, so that the manipulator is difficult to put an accurate electric core into the shell; (3) The top connecting piece of the existing insulating film can be correspondingly provided with a pole through hole so as to facilitate the electric connection between the battery core and the pole, so that the edge of the top connecting piece, which is provided with a hole at the pole position, is thinner, and after the large-surface cladding piece is deformed, the thinner part of the edge is easy to break.

In view of this, it is necessary to design an insulating film, a battery and electric equipment to solve the problem that the insulating film on one side will drive the insulating film on the other side to deform and crumple after being pulled.

Disclosure of Invention

The utility model aims to provide an insulating film, a battery and electric equipment, so as to solve the problem that the insulating film on one side can drive the insulating film on the other side to deform and wrinkle after being pulled.

To achieve the purpose, the utility model adopts the following technical scheme:

an insulating film comprises a first diaphragm and at least one connecting part for fixedly connecting with a battery top cover; the first diaphragm is connected with the connecting part;

the connecting part is connected to the first edge of the first diaphragm, and the connecting part can be bent relative to the first diaphragm.

Optionally, a fixing hole is formed in the connecting portion; or the connecting part is provided with a hot melting part for hot melting and fixing on the battery top cover.

Optionally, the insulating film further includes a second membrane;

the first diaphragm is provided with a second edge opposite to the first edge, and the second diaphragm is connected to the second edge.

Optionally, the connecting portion is provided with one, and the connecting portion is connected to the middle portion of the first edge.

Optionally, the connecting portion is provided with a plurality of, and a plurality of connecting portions are arranged on the first edge at intervals.

A battery comprising a cell and at least two insulating films as claimed in any one of the preceding claims;

the battery cell comprises a battery top cover, and connecting parts of all insulating films are fixed on the bottom surface of the battery top cover facing the battery cell; the first membrane is at least partially coated on the side surface of the battery cell.

Optionally, the bottom surface of battery top cap is provided with the arch, connecting portion cover is established through the fixed orifices on the arch.

Optionally, the battery top cover comprises a top cover sheet and a lower plastic, wherein the lower plastic is integrated on the bottom surface of the top cover sheet facing the battery cell, and all the connecting parts are fixed on the lower plastic in a hot-melting way.

Optionally, the battery top cover comprises a top cover plate and lower plastic, the lower plastic is integrated on the bottom surface of the top cover plate facing the battery cell, the lower plastic forms a bulge protruding towards the battery cell direction, and the connecting part is sleeved and fixed on the bulge through a fixing hole.

A powered device comprising a battery as claimed in any one of the preceding claims.

Compared with the prior art, the utility model has the following beneficial effects:

in the utility model, the connecting part of the insulating film is fixedly connected with the battery top cover, and the first diaphragm is coated on the side surface of the battery core after being bent relative to the connecting part; through being provided with two insulating films and cladding the opposite both sides of electric core respectively, because two insulating films cladding position is different and do not link to each other to can effectively avoid one of them first diaphragm to drive the condition of the first diaphragm deformation or the crumple of electric core opposite side after drawing.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would still fall within the scope of the present disclosure without affecting the efficacy or achievement of the present disclosure.

Fig. 1 is a schematic structural diagram of an insulating film according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an insulating film according to a second embodiment of the present utility model;

fig. 3 is a schematic view of an installation structure of an insulating film and a battery top cover according to a third embodiment of the present utility model;

fig. 4 is a schematic view of an installation structure of an insulating film and another battery top cover according to a third embodiment of the present utility model;

fig. 5 is a schematic view showing an expanded structure of two insulating films in the third embodiment of the present utility model;

fig. 6 is a schematic view of an installation structure of an insulating film and a battery top cover according to a fourth embodiment of the present utility model.

Illustration of: 1. a first membrane; 2. a connection part; 21. a fixing hole; 22. a hot melt section; 3. a second membrane; 4. a battery top cover; 41. a protrusion; 401. a top cover sheet; 402. and (5) lower plastic.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, the technical solutions in the embodiments of the present utility model are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Example 1

The embodiment of the utility model provides an insulating film, which can be beneficial to better cover an electric core by the insulating film, and the problem that the insulating film is deformed and wrinkled as a whole after the insulating film on one side surface is pulled is avoided.

Referring to fig. 1, the insulating film includes a first membrane 1 and at least one connecting portion 2 for fixedly connecting with a battery top cover 4, wherein the first membrane 1 is connected with the connecting portion 2; the connecting portion 2 is connected to the first edge of the first membrane 1, and the connecting portion 2 can be bent with respect to the first membrane 1.

Specifically, the bending portion may be a connection portion between the first membrane 1 and the connection portion 2, or an edge portion where the connection portion 2 is connected to the first membrane 1, or a first edge where the connection portion 2 is connected to the first membrane 1.

In this embodiment, the connection part 2 is provided with a fixing hole 21, and the connection part 2 can be fixedly connected with the top cover through the fixing hole 21, so as to ensure that the insulating film is fixed on the battery cell. Wherein the fixing hole 21 may be provided as one; further, the fixing holes 21 may be provided in two or more; the fixing holes 21 are preferably provided in at least two to promote stability of the insulating film fixed to the top cover 4.

It should also be noted that the connection 2 can also be fixedly connected to the battery top cover 4 by other means, such as by means of an intermediate connection, a welded connection, an adhesive connection, a clamping connection, or the like. Wherein the clamping connection means that one end of the connection part 2 is clamped by the battery top cover 4.

When the battery core needs to be coated, the battery core is coated by at least two insulating films. For example, the first film of one insulating film is used for coating one large surface of the battery cell, and the insulating film of the other insulating film is used for coating the other large surface of the battery cell, so that a good coating effect on the battery cell is formed. Wherein, the connecting part 2 of two insulating films is fixedly connected with the top cover of the battery cell. When the two insulating films are coated on the battery core, the two insulating films are separated from each other, so that deformation or wrinkling caused by the involvement can be effectively avoided.

The term "large surface" as used herein refers to the side surface with the largest area on the cell.

Optionally, the insulating film further comprises a second membrane 3; the first membrane 1 is provided with a second edge opposite the first edge, to which the second membrane 3 is connected. Specifically, the second membrane 3 is used for coating one side of the bottom of the battery cell. Preferably, the second membrane 3 is provided with a penetration hole for passing the electrolyte; when the explosion-proof valve of the battery core is arranged on the battery top cover 4, the penetrating hole arranged on the second diaphragm 3 can suck electrolyte at the bottom of the battery shell into the bare battery core; when the explosion-proof valve of electricity core sets up the bottom at the casing, then can not be provided with the infiltration hole, need be provided with the hole of dodging this moment and keep away the explosion-proof valve in order to avoid the sky, dodging the hole in this embodiment and be waist shape hole, dodging the hole and still can set up to oval hole or other shape's through-holes.

It should be further noted that the two second membranes 3 at the bottom can be connected to the bottom of the battery cell by welding, or can be fixed by being respectively pressed by the bottom of the battery cell.

Optionally, the first membrane 1 is provided with an adhesive coating, by means of which the first membrane 1 can be adhered to the large side or other side of the cell. In particular, since the battery cell is immersed in the electrolyte for a long period of time, the adhesion effect of the first film sheet 1 is actually unstable and easily falls off, and therefore, the connection portion 2 must be provided to connect the battery top cover 4, thereby achieving a better fixing effect on the insulating film.

Alternatively, the connecting portion 2 is provided with one, and the connecting portion 2 is connected in the middle of the first edge. Alternatively, the connecting parts 2 are provided in a plurality, and the connecting parts 2 are arranged on the first edge at intervals. The number of the connection parts 2 may be determined according to the desired connection fixing effect, i.e., if one connection part 2 can well fix the insulating film on the battery top cover 4, only one connection part may be provided. When the insulating film is easily detached from the battery top cover after the connection of one connection part 2 and the battery top cover 4, it is necessary to appropriately increase the number of connection parts 2.

When the connecting portion 2 is provided with one, the connecting portion 2 is arranged in the middle of the first edge, so as to promote the fixing effect of the connecting portion 2 as much as possible.

Example two

Unlike the first embodiment, as shown in fig. 2, in the present embodiment, the connection part 2 is provided with a heat-fusible part 22 for heat-fusing to be fixed to the battery top cover 4. That is, the connection part 2 is thermally fused to the battery top cover 4 by the thermal fusion part 22, thereby fixing the connection part 2 to the battery top cover 4.

Example III

Referring to fig. 3, 4 and 5, the present embodiment discloses a battery including a cell and at least two insulating films as described in any of the above embodiments.

The battery cell comprises a battery top cover 4, and connecting parts 2 of all insulating films are fixed on the bottom surface of the battery top cover 4 facing the battery cell; the first membrane 1 is at least partially coated on the side of the cell.

Optionally, the bottom surface of the battery top cover 4 is provided with a protrusion 41, and the connection part 2 is sleeved on the protrusion 41 through the fixing hole 21, so that the connection part 2 and the battery top cover 4 are fixedly connected.

The battery includes a battery cell and a housing, the battery cell is accommodated in the housing, and the battery cell includes a battery top cover 4 and a bare cell. The battery top cover 4 is provided with a position for connecting the insulating film. The shell can be a hollow structure with one side open or a hollow structure with two sides open. The housing may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

The battery cell of the embodiment of the utility model can comprise one or more bare battery cells, wherein the bare battery cells comprise a positive pole piece, a negative pole piece and a diaphragm. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The separator may be made of PP (polypropylene) or PE (polyethylene).

Example IV

Unlike the third embodiment, referring to fig. 6, in the present embodiment, the battery top cover 4 includes a top cover plate 401 and a lower plastic 402, the lower plastic 402 is integrated on the bottom surface of the top cover plate 401 facing the battery core, and all the connection parts 2 are fixed on the lower plastic 402 by hot melting, so as to realize the fixed connection between the connection parts 2 and the battery top cover 4.

Example five

The battery used by the electric equipment is one of the above embodiments, and the main design points of the utility model are that the structure of the insulating film is improved, and the assembly relationship between the insulating film and the battery is not repeated for other structures of the electric equipment, such as the electric connection part and the mechanical structure part of the electric equipment.

The electric equipment can be an automobile, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the utility model does not limit the electric equipment in particular.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The insulating film is characterized by comprising a first film (1) and at least one connecting part (2) for fixedly connecting with a battery top cover (4), wherein the first film (1) is connected with the connecting part (2);

the connecting part (2) is connected to the first edge of the first membrane (1), and the connecting part (2) can be bent relative to the first membrane (1).

2. An insulating film according to claim 1, characterized in that the connecting portion (2) is provided with a fixing hole (21); alternatively, the connecting part (2) is provided with a heat-fusible part (22) for heat-fusing and fixing to the battery top cover (4).

3. The insulating film according to claim 1, further comprising a second membrane (3);

the first membrane (1) is provided with a second edge opposite to the first edge, to which the second membrane (3) is connected.

4. An insulating film according to claim 1, characterized in that the connection portion (2) is provided with one, the connection portion (2) being connected in the middle of the first edge.

5. An insulating film according to claim 1, characterized in that the connecting portions (2) are provided in a number, and that the connecting portions (2) are arranged at intervals on the first edge.

6. A battery comprising a cell and at least two insulating films according to any one of claims 1 to 5;

the battery cell comprises a battery top cover (4), and connecting parts (2) of all insulating films are fixed on the bottom surface of the battery top cover (4) facing the battery cell; the first membrane (1) is at least partially coated on the side surface of the battery cell.

7. The battery according to claim 6, wherein the bottom surface of the battery top cover (4) is provided with a protrusion (41), and the connecting portion (2) is sleeved on the protrusion (41) through the fixing hole (21).

8. The battery according to claim 6, characterized in that the battery top cover (4) comprises a top cover sheet (401) and a lower plastic (402), the lower plastic (402) being integrated on the bottom surface of the top cover sheet (401) facing the battery cells, all connections (2) being heat-fused to the lower plastic (402).

9. The battery according to claim 6, wherein the battery top cover (4) comprises a top cover sheet (401) and a lower plastic (402), the lower plastic (402) is integrated on the bottom surface of the top cover sheet (401) facing the battery cell, the lower plastic (402) forms a protrusion (41) protruding towards the battery cell, and the connecting part (2) is sleeved and fixed on the protrusion (41) through a fixing hole (21).

10. A powered device comprising a battery as claimed in any one of claims 6-9.