CN216958328U - Soft-packaged battery core, battery pack and power utilization device - Google Patents

Abstract

The application discloses laminate polymer core, battery package and power consumption device. The soft package battery cell comprises a main body part, a pole lug and a soft package shell for covering the main body part and at least part of the pole lug, wherein a covering piece is arranged at the side end of the soft package shell, the covering piece is provided with a groove matched with the side end of the soft package battery cell, and the side end of the soft package shell is accommodated in the groove; the cladding piece comprises a third side surface, the third side surface protrudes outwards to form an arc-shaped protrusion, and the arc-shaped protrusion can be matched with an arc-shaped groove on the inner side of the shell. This application realizes that the fixed process that needs of soft-packaged electrical core is few, with low costs.

Description

Soft-packaged battery core, battery pack and power utilization device

Technical Field

The application relates to the field of battery manufacturing, in particular to a soft-package battery core, a battery pack and an electric device.

Background

The battery cell is an electricity storage part in the battery, and the quality of the battery cell directly determines the quality of the rechargeable battery. At present, the battery cell is divided into an aluminum shell battery cell, a soft package battery cell (also called a polymer battery cell) and a cylindrical battery cell.

In the manufacturing process of the battery, the fixation of the cell and the casing (PACK) is generally performed as follows: a plurality of electric cores are piled together, and it is fixed with the casing to realize electric core and casing through the whole encapsulating of casing, but this kind of whole encapsulating mode is with high costs, and weight is big. The shell can be further internally provided with a profile groove, the profile groove is internally glued with a glue to be fixed with the battery cell, the procedures required by the fixing mode are more, and the matching tolerance of the profile groove and the battery cell is difficult to control. In addition, can also set up earlier the support box, electric core is put in the support box and is fixed through the gum bonding, and a plurality of support boxes are fixed or be assembled between/be connected with the casing in groups, but the support box is with high costs. In view of the above, it is necessary to provide a cell fixing solution with low cost and easy operation.

SUMMERY OF THE UTILITY MODEL

The application provides a laminate polymer battery core, battery package and power consumption device to improve the many, the problem with high costs of process that current electric core is fixed needs.

The application provides a soft-packaged battery core, including main part and utmost point ear to and the soft-packaged casing of cladding main part and at least partial utmost point ear. A covering piece is arranged at the side end of the soft package shell, the covering piece is provided with a groove matched with the side end of the soft package cell, and the side end of the soft package shell is accommodated in the groove; the cladding piece comprises a third side surface, the third side surface protrudes outwards to form an arc-shaped protrusion, and the arc-shaped protrusion is matched with the arc-shaped groove on the inner side of the shell.

Optionally, the hardness of the overmold is greater than the hardness of the soft pack housing of the body portion.

Optionally, the battery cell comprises a wound electrode assembly, and the side end of the soft package shell corresponds to the folded edge of the wound electrode assembly; or the soft package battery core comprises a stacked electrode assembly, and the side end of the soft package shell corresponds to the side face of the stacked electrode assembly.

Optionally, the wrapping member and the soft package shell of the soft package battery cell are integrally formed.

Optionally, the covering member is an elastic member made of potting adhesive or nylon.

Optionally, the covering member is an elastic member with an elastic modulus of more than 5 MPa.

Optionally, the wrapping piece further comprises a first side face and a second side face which are relatively parallel, the third side face is connected with the first side face and the second side face, and the groove is arranged between the first side face and the second side face.

Optionally, the wrapping piece further includes a fourth side surface connecting the first side surface and the second side surface and disposed opposite to the third side surface, and the groove is formed in the fourth side surface.

Optionally, the soft pack housing comprises a first side end and a second side end opposite to the first side end; the soft-packaged battery cell comprises: the first wrapping piece is used for wrapping the first side end of the main body part, and the second wrapping piece is used for wrapping the second side end of the soft package shell.

Optionally, the first wrapping member is disposed at a middle position of the first side end, and the second wrapping member is disposed at a middle position of the second side end; or the first wrapping piece comprises an end wrapping piece and a middle wrapping piece which are respectively arranged at two ends and the middle position of the first side end; the second coating piece comprises an end coating piece and a middle coating piece which are respectively arranged at two ends and the middle position of the second side end.

The application provides a battery pack, including casing and above-mentioned arbitrary soft packet of electricity core, the inboard arc wall that is equipped with of casing, arc is protruding to be located the arc wall.

The application provides a power consumption device, including load and above-mentioned arbitrary any soft-packaged electrical core, soft-packaged electrical core supplies power for the load.

Optionally, the powered device comprises an electric vehicle or a drone.

In the utility model provides a laminate other laminate polymer core in these two sides of laminate polymer core, battery package and power consumption device, laminate polymer core's side is provided with the cladding piece, and it has first side and the second side of relative parallel, set up the recess with laminate polymer core's side adaptation in these two sides, laminate polymer core is convenient for in these two sides of laminate polymer core behind this cladding piece of side cladding of laminate polymer core because the first side and the second side of cladding piece are parallel relatively. The soft package battery cell fixing device comprises a shell, a plurality of soft package battery cells, a wrapping piece and a wrapping piece, wherein the wrapping piece is wrapped on the soft package battery cells; the third side of cladding piece is outside outstanding, forms the arc protruding, and the arc is protruding to match with the inboard arc wall of casing (for example module casing), can realize the assembly of soft package electricity core with the casing, and is with low costs.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be derived from these drawings by a person skilled in the art.

Fig. 1 is a schematic structural diagram of a soft-package battery cell;

fig. 2 is a schematic structural diagram of a soft-package battery cell according to an embodiment of the present application;

FIG. 3 is a perspective view of the covering of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the covering of FIG. 3;

fig. 5 is a schematic diagram of a plurality of soft-packed cell stacks shown in fig. 2;

fig. 6 is a schematic structural diagram of a soft-package battery cell according to another embodiment of the present application;

FIG. 7 is a perspective view of the covering of FIG. 6;

FIG. 8 is a schematic structural diagram of a housing according to an embodiment of the present application;

fig. 9 is a schematic diagram of a flexible package cell according to an embodiment of the present application after being loaded into a casing;

fig. 10 is a schematic structural diagram of a soft-package cell according to another embodiment of the present application;

fig. 11 is an exploded view of the soft-packaged cell shown in fig. 10.

Detailed Description

The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following embodiments and their technical features may be combined with each other without conflict.

It should be understood that in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions and simplifying the description of the respective embodiments of the present application, and do not indicate or imply that a device or an element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

The flexible-package cell of the present application includes all devices in which electrochemical reactions take place. Illustratively, pouch cells include, but are not limited to, all kinds of primary batteries, secondary batteries, fuel cells, solar cells, and capacitor (e.g., supercapacitor) electrochemical devices. The pouch cell is particularly preferably a lithium secondary battery including, but not limited to, a lithium metal secondary battery, a lithium ion secondary battery, a lithium polymer secondary battery, and a lithium ion polymer secondary battery. The utility model provides a laminate polymer battery core can be battery or battery module, battery module or battery package.

The soft package battery core has the advantages of good safety, light weight, large battery capacity, good cycle performance, small internal resistance, flexible design and the like, and is widely used. Fig. 1 is a schematic structural diagram of a soft-package battery cell. Referring to fig. 1, the flexible package cell 1 includes a main body portion (not shown) and a tab 13, and a flexible package housing 14 covering the main body portion and at least a portion of the tab 13. The soft package shell 14 may include an aluminum-plastic film, the main body portion may include a continuously wound electrode assembly (also called a "jelly roll") sealed in the aluminum-plastic film and an electrolyte, the electrode assembly is led out through a tab 13 at the top of the main body portion, one portion of the tab 13 extends into the soft package shell 14, and the other portion extends out of the soft package shell 14. Although the technical solution of the present application is described by taking a soft package battery as an example in the present application, the application of the technical solution of the present application is not limited to the soft package battery.

Fig. 2 is a schematic structural diagram of a soft-package battery cell according to an embodiment of the present application; FIG. 3 is a perspective view of the covering of FIG. 1; fig. 4 is a schematic cross-sectional view of the covering of fig. 3.

Referring to fig. 2, 3 and 4, an embodiment of the present application provides a wrapping member 2 for wrapping a side end of a soft-packing case 14. For example, the covering member 2 may be covered at a first side end 10 and a second side end 11 of the soft pack case 14, which are opposite to each other. It should be understood that, in some descriptions herein, the side end of the soft packing case 14 may be regarded as the side end of the soft packing cell 1, or the side end of the main body portion.

The above-mentioned cladding member 2 includes: a first side 201 and a second side 202 which are opposite and parallel, and a third side 203 and a fourth side 204 which connect the first side 201 and the second side 202, wherein the fourth side 204 is provided with a groove 200 which is matched with the side end of the soft package shell 14.

After the main body portion is sealed by a soft package casing 14 made of a material such as an aluminum plastic film, and subjected to a formation and rolling process, the surface of the soft package battery cell 1 forms a plane 12. The wrapping member 2 wraps the side surface of the soft package battery cell 1, the plane 12 and the edge of the other plane opposite to the plane 12, the first side end 10 of the soft package shell 14 is accommodated in the groove 200 of the first wrapping member 2, and the second side end 11 of the soft package shell 14 is accommodated in the groove 200 of the second wrapping member 2. When the plurality of soft package cells 1 are stacked, the plane 12 and the other plane opposite to the plane 12 serve as support surfaces.

The pouch cell 1 may include a laminated electrode assembly or a wound electrode assembly. If the pouch cell 1 includes a continuously wound electrode assembly, the side ends of the pouch case 14 correspond to the folded edges of the wound electrode assembly. If the pouch cell 1 includes a stacked electrode assembly, the side end of the pouch case 14 corresponds to the side of the stacked electrode assembly. The sheathing member 2 sheathes at least the folded edges of the wound electrode assembly or the sides of the stacked electrode assembly.

Fig. 5 is a schematic view of a stack of several soft-pack cells with a wrapping as shown in fig. 2. As shown in fig. 5, after the wrapping member 2 is wrapped at both side ends of the flexible package core 1, a module is formed by stacking, and then the module is loaded into a case. Exert certain power through the casing to range upon range of soft-packaged electrical core 1 and compress tightly, its effect is mainly retrained soft-packaged electrical core 1. Optionally, the soft package battery core 1 may have tabs 13 formed on one side, or may have tabs 13 formed on both sides.

Since the first side 201 and the second side 202 of the wrapping member 2 are relatively parallel, it is convenient to stack other soft-package cells 1 on the two sides of the soft-package cell 1. Install in casing 3 after a plurality of cladding have the range upon range of soft-packaged electrical core 1 of cladding 2, fix soft-packaged electrical core 1 through casing 3 and cladding 2, the appropriate extrusion force between cladding 2, can reduce the fixed process that needs of soft-packaged electrical core 1 here and reduce cost.

In one implementation, the hardness of the covering 2 may be greater than the hardness of the soft pack case 14, where the covering 2 can protect the soft pack case 14, and for the laminated soft pack cell 1, the covering 2 may reduce the risk of the soft pack case 14 being damaged by extrusion.

Optionally, the wrapping member 2 and the soft-package battery core 1 are integrally formed. During the plastic-aluminum membrane encapsulation, directly form cladding 2 at two sides of soft-packaged electrical core 1 through integrated into one piece's mode, this step directly forms soft-packaged electrical core 1 that has cladding 2. The covering member 2 may be potting adhesive or nylon plastic or other materials that can be integrally molded with the soft package battery core 1.

Alternatively, the covering 2 may be an elastic member having a certain elasticity. The side end of the soft-package battery cell 1 is coated with the coating member 2, and then a plurality of soft-package battery cells 1 with the coating members 2 are stacked and then are loaded into the shell. Have elastic cladding piece 2 and fill the space at adjacent soft-packaged electrical core 1 edge, both can fix soft-packaged electrical core 1, can provide the protection for soft-packaged electrical core 1 again, produce big external force impact to soft-packaged electrical core 1 when avoiding the casing to rock.

The covering member 2 may be an elastic member made of potting adhesive or nylon. Optionally, the covering member 2 is an elastic member having an elastic modulus of more than 5 MPa. Elastic modulus is greater than 5 MPa's material and makes cladding 2, and these a little cladding 2 cladding are in soft-packaged electrical core 1 and with soft-packaged electrical core 1 pack into the casing after, can exert suitable power through the shell to range upon range of soft-packaged electrical core 1 and compress tightly, retrain soft-packaged electrical core 1. If the elastic modulus is too small, the external impact may not be counteracted, resulting in local deformation and chemical degradation of the aluminum plastic film of the soft package core 1.

Alternatively, the outer side of the covering 2, i.e. the third side 203, may be flat, curved or of another shape.

FIG. 6 is a schematic structural view of a covering 2 according to another embodiment of the present application; FIG. 7 is a perspective view of the covering 2 shown in FIG. 6; FIG. 8 is a schematic structural diagram of a housing according to an embodiment of the present disclosure; fig. 9 is a schematic diagram of the soft package battery 1 according to the embodiment of the present application after being installed in a casing.

In some embodiments, as shown in fig. 7 and 8, the fourth side 204 of the overmold 2 is provided with a groove 200; the third side 203 of the cover 2 protrudes outwards forming an arc-shaped protrusion. The arc-shaped protrusion matches with an arc-shaped slot 31 on the inner side of the housing (also called module housing) 3. As shown in the figure, the inner side of the casing 3 is provided with an arc-shaped slot 31 for assembling the bracket box, and the third side 203 of the core cladding member 2 protrudes outwards to form an arc-shaped protrusion matching with the arc-shaped slot on the inner side of the casing 3.

In some embodiments, the cover 2 may cover only a local position of the soft-pack cell 1, for example, may cover only a middle section of the soft-pack cell 1. For another example, referring to fig. 10 and 11, the covering member 2 may be designed in multiple segments, which respectively cover the end and the middle of the soft packing core 1.

The embodiment of this application still provides a soft-packaged electrical core 1, includes: a wrapper 2 according to any of the preceding claims.

As shown in fig. 2, 5 and 6, the soft package core 1 of the present embodiment includes: a first wrapping member 21 for wrapping the first side end 10 of the soft packing case 14, and a second wrapping member 22 for wrapping the second side end 11 of the soft packing case 14.

Referring to fig. 2 or 6, in some embodiments, the number of the first wrapping member 21 and the second wrapping member 22 may be one, the first wrapping member 21 is disposed at a middle position of the first side end 10 of the soft-package housing 14, and the second wrapping member 22 is disposed at a middle position of the second side end 11 of the soft-package housing 14.

Fig. 9 is a schematic structural diagram of a flexible package cell 1 with a plurality of wrapping members 2 according to yet another embodiment of the present application; fig. 10 is an exploded view of the soft-package battery cell 1 shown in fig. 9.

Referring to fig. 9 and 10 together, in some embodiments, the flexible package core 1 includes three first wrapping members 21 and three second wrapping members 22, the three first wrapping members 21 are respectively disposed at two ends and a middle position of the first side end 10 of the flexible package housing 14, and the three second wrapping members 22 are respectively disposed at two ends and a middle position of the second side end 11 of the flexible package housing 14. The first cladding 21 and the second cladding 22 at the two ends can be called end cladding, and the first cladding 21 and the second cladding 22 at the middle can be called middle cladding.

Optionally, a gasket is further disposed between the plurality of stacked soft package battery cells 1. The gasket can be an insulating elastic gasket and is used for separating the adjacent soft package battery cores 1.

The application also provides a battery pack, for example as shown in fig. 9, including casing 3 and the soft-packaged electrical core 1 of any of the above embodiments, the inboard arc groove 31 that is equipped with of casing 3, the arc of soft-packaged electrical core 1 is protruding to be located in arc groove 31. The battery pack has the pouch cell 1 of any one of the foregoing embodiments, and the battery pack can produce beneficial effects that the pouch cell 1 of the corresponding embodiment has.

The application also provides an electric device, which comprises the soft package battery cell 1 or the battery pack according to any embodiment of the application.

Since the electronic device has the pouch cell 1 or the battery pack of any one of the foregoing embodiments, the electronic device can produce the beneficial effects of the pouch cell 1 or the battery pack of the corresponding embodiments.

The embodiment of the present application is not limited to the specific expression of the electric device of the present application. In some scenarios, the powered devices of the present application include, but are not limited to: notebook computers, pen-input computers, mobile computers, electronic book players, cellular phones, portable facsimile machines, portable copiers, portable printers, headphones, video recorders, liquid crystal televisions, portable cleaners, portable CD players, mini-discs, transceivers, electronic notebooks, calculators, memory cards, portable recorders, radios, backup power supplies, motors, automobiles, motorcycles, mopeds, bicycles, lighting fixtures, toys, game machines, clocks, electric tools, flashlights, cameras, large household batteries, lithium ion capacitors, and the like.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent structural changes made by using the contents of the specification and the drawings are included in the scope of the present application.

Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element, and that elements, features, or elements having the same designation in different embodiments may or may not have the same meaning as that of the other elements, and that the particular meaning will be determined by its interpretation in the particular embodiment or by its context in further embodiments.

In addition, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well. The terms "or" and/or "are to be construed as inclusive or meaning any one or any combination. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

Claims (12)

1. A soft package battery cell comprises a main body part, a pole lug and a soft package shell covering the main body part and at least part of the pole lug, and is characterized in that,

a wrapping piece is arranged at the side end of the soft package shell, a groove matched with the side end of the soft package battery cell is formed in the wrapping piece, and the side end of the soft package shell is accommodated in the groove;

the cladding piece comprises a third side surface, the third side surface protrudes outwards to form an arc-shaped protrusion, and the arc-shaped protrusion can be matched with an arc-shaped groove on the inner side of the shell.

2. The flexible package cell of claim 1, wherein the durometer of the overmold is greater than the durometer of the flexible package housing of the body portion.

3. The flexible-package cell according to claim 1, comprising a wound electrode assembly, wherein the side end of the flexible-package housing corresponds to the folded edge of the wound electrode assembly; or, the soft package battery core comprises a laminated electrode assembly, and the side end of the soft package shell corresponds to the side face of the laminated electrode assembly.

4. The flexible-package battery cell according to claim 1, characterized in that the wrapping member is integrally formed with a flexible-package casing of the flexible-package battery cell.

5. The soft-package battery cell according to claim 1, wherein the covering member is an elastic member made of potting adhesive or nylon.

6. The flexible packaging core according to any one of claims 1 to 5, characterized in that the wrapping member is an elastic member with an elastic modulus of more than 5 MPa.

7. The soft-package cell of claim 1, wherein the wrapping further comprises first and second opposing parallel sides, wherein the third side connects the first and second sides, and wherein the recess is disposed between the first and second sides.

8. The flexible package cell of claim 1, wherein the flexible package housing comprises a first lateral end and a second lateral end opposite the first lateral end; the soft-packaged battery cell comprises: and the first wrapping piece is used for wrapping the first side end of the soft package shell, and the second wrapping piece is used for wrapping the second side end of the soft package shell.

9. The flexible packaging core according to claim 8, wherein the first wrapping member is disposed at a middle position of the first side end, and the second wrapping member is disposed at a middle position of the second side end; alternatively, the first and second electrodes may be,

the first wrapping piece comprises an end wrapping piece and a middle wrapping piece which are respectively arranged at two ends and the middle position of the first side end; the second covering piece comprises an end covering piece and a middle covering piece which are respectively arranged at two ends and the middle position of the second side end.

10. A battery pack, comprising a housing and the flexible package core of any one of claims 1 to 9, wherein an arc-shaped groove is formed inside the housing, and the arc-shaped protrusion is located in the arc-shaped groove.

11. An electrical device comprising a load and the pouch of any one of claims 1 to 9 or the battery pack of claim 10, the pouch or the battery pack supplying power to the load.

12. The powered device of claim 11, wherein the powered device comprises an electric vehicle or a drone.

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