CN111129383A

CN111129383A - Flexible battery pack

Info

Publication number: CN111129383A
Application number: CN201911335955.1A
Authority: CN
Inventors: 宋泽铭; 张留华; 何蕾
Original assignee: Jiaxing Jizhan Technology Co Ltd
Current assignee: Jiaxing Jizhan Technology Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-05-08
Anticipated expiration: 2039-12-23
Also published as: CN111129383B

Abstract

The invention discloses a flexible battery pack, comprising: a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly; the battery core assembly comprises at least two battery cores and flexible connecting pieces used for electrically connecting the adjacent battery cores; the protective housing includes two at least main casings and is used for connecting the structure between the shell of adjacent main casing, the main casing is used for the holding and protects electric core, structure can stretch, buckle or twist and be used for protecting between the shell flexible connector. According to the flexible battery pack, the battery cells are connected into the flexible and stretchable battery cell assembly through the flexible connecting piece and then are accommodated in the flexible and stretchable protective shell, so that the flexible battery pack can be stretched, bent, twisted and conductive, the capacity of the battery pack can reach over 100mAh, and the safety is higher.

Description

Flexible battery pack

Technical Field

The invention relates to the technical field of batteries, in particular to a flexible battery pack.

Background

With the rapid development of electronic technology, more and more electronic devices are being developed toward the direction of light weight, thinness and flexibility. The biggest challenge at present is the flexible energy storage power supply product. In the fields of intelligent clothing, flexible electronics, medical equipment, flexible sensors, flexible displays and the like, the flexible battery is urgently needed. The traditional lithium ion battery can not be bent or folded, and even can cause short circuit between the anode and the cathode when the volume change is overlarge, so that thermal runaway is caused, and a serious safety problem is caused.

Currently, companies such as panasonic and NEC have introduced flexible battery products. The current flexible battery uses an ultrathin flexible battery cell, can realize bending and has certain flexibility; but has the following disadvantages: the bending times are limited, and the battery life is lost when the bending times are more; meanwhile, the capacity is low and is between about 1mAh and 100 mAh; moreover, the ultrathin flexible battery cell can only be bent and cannot be stretched or twisted. In addition, the existing flexible battery product lacks external protection, has low safety, and is easy to have safety problems such as puncture and rupture.

Disclosure of Invention

The embodiment of the invention provides a flexible battery pack, which is used for manufacturing the flexible battery pack by using a common inflexible battery cell.

The technical scheme adopted by the invention is as follows:

a flexible battery pack comprising: a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly; the battery core assembly comprises at least two battery cores and flexible connecting pieces used for electrically connecting the adjacent battery cores; the protective housing includes two at least main casings and is used for connecting the structure between the shell of adjacent main casing, the main casing is used for the holding and protects electric core, structure can stretch, buckle or twist and be used for protecting between the shell flexible connector.

In a possible implementation manner, the flexible connecting piece comprises two connecting ends and a connecting line connected between the two connecting ends, and the connecting line is bent for multiple times to form a plane deformation structure or a three-dimensional spring structure. Optionally, an included angle is formed between the plane where the plane deformation structure is located and the extending direction of the two connecting ends. Optionally, the planar deformation structure is an elliptical spiral structure, a circular spiral structure or a corrugated structure; the three-dimensional spring structure is a round, flat or special-shaped spring structure.

In one possible implementation, the side wall of the main housing is provided with an opening allowing the flexible connection member to pass through. Optionally, the main casing is formed by mutually buckling and connecting two box bodies.

In one possible implementation manner, the inter-shell structure comprises a bending limiting sheet and a pulling limiting sheet, the bottom of the main shell is provided with a corresponding bending limiting sheet groove and a corresponding pulling limiting sheet groove, the end of the bending limiting sheet falls into and is slidably limited in the bending limiting sheet groove, and the end of the pulling limiting sheet falls into and is slidably limited in the pulling limiting sheet groove; the main casing body further comprises a spacer arranged at the bottom of the main casing body, the spacer is used for separating the battery cell accommodated in the main casing body from the bottom of the main casing body, and the bending limiting sheet and the pulling limiting sheet are positioned between the spacer and the bottom of the main casing body. Optionally, the bending limiting sheet and the pulling limiting sheet are both in an I-shaped structure, and the width of the bending limiting sheet is greater than that of the pulling limiting sheet.

In a possible implementation manner, the inter-shell structure includes an elastic sheet, an elongated slot is formed on the elastic sheet, a convex body is arranged in the middle of an opening of a side wall of the main shell, a corresponding elastic sheet groove is formed at the bottom of the main shell, the elongated slot of the elastic sheet is sleeved on the convex body, and the end of the elastic sheet falls into and is slidably limited in the elastic sheet groove; the main casing body further comprises a spacer arranged at the bottom of the main casing body, the spacer is used for isolating the battery cell accommodated in the main casing body from the bottom of the main casing body, and the elastic sheet is positioned between the spacer and the bottom of the main casing body. Optionally, a boss is formed in the spring plate groove, and the boss is embedded in the long groove of the spring plate and used for limiting the sliding range of the spring plate.

In a possible implementation manner, the inter-shell structure is a hollow spring, and the flexible connecting body penetrates through a hollow inner cavity of the spring.

According to the technical scheme, the embodiment of the invention has the following advantages:

the flexible battery pack uses the island bridge structure, the electric cores are connected into the flexible and stretchable electric core assembly through the flexible connecting piece and then are contained in the flexible and stretchable protective shell, and the characteristics of stretching, bending, twisting and electric conduction are realized.

The flexible battery pack has the advantages of wide bending angle (0-180 degrees), long stretching length (0-300 percent), certain torsion angle (0-90 degrees), capacity of the battery pack capable of reaching more than 100mAh and the like. Experiments prove that the flexible battery pack can be stretched by 60-100mm (0-300%), the stretching frequency is more than million times, the flexible battery pack can be bent by 180 degrees, the bending frequency is more than million times, the flexible battery pack can be twisted by 0-90 degrees, the twisting frequency is more than million times, and the capacity of the battery pack can reach more than 100 mAh.

According to the flexible battery pack, the protective shell can deform along with the battery assembly, and meanwhile, the protection can be provided for the battery cell, so that the flexible battery pack has the performances of resisting vibration, impact, extrusion, falling and the like, and the safety is improved.

The flexible battery pack has strong structural adjustment and strong universality, and can be designed into corresponding structural sizes according to different use conditions to meet the use requirements of customers.

The flexible battery pack has a wide application range. In the wearing field, the flexible battery pack can be arranged in clothes, and deforms along with body movement and continuously supplies power to electric appliances (such as a refrigerating electric appliance, a luminous electric appliance and a heating electric appliance) in the clothes, so that more comfortable clothes wearing experience is provided. Through the cooperation of the flexible battery pack and the flexible screen, the bending, twisting and other characteristics of flexible electronic products (flexible mobile phones and flexible computers) can be realized.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.

FIGS. 1-1 to 1-4 are schematic views showing various possible configurations of a flexible connecting unit according to embodiment 1 of the present invention;

fig. 2-1 is a schematic structural view of a main casing in embodiment 2 of the present invention;

fig. 2-2 is a schematic structural view of a bend limiter in embodiment 2 of the present invention;

2-3 are schematic structural views of a limit tab in embodiment 2 of the invention;

FIGS. 2 to 4 are schematic structural views of a separator in example 2 of the present invention;

fig. 2 to 5 are schematic structural views of two main housings connected by an inter-housing structure in embodiment 2 of the present invention;

fig. 2 to 6 are schematic structural views of a main housing combined by two cases in embodiment 2 of the present invention;

fig. 3-1 is a schematic structural view of a main casing in embodiment 3 of the present invention;

fig. 3-2 is a schematic structural diagram of a spring piece according to embodiment 3 of the present invention;

3-3 is a schematic structural view of a separator in embodiment 3 of the present invention;

fig. 3-4 are schematic structural diagrams of a main housing combined by two cases in embodiment 3 of the present invention;

fig. 4-1 is a schematic structural view of a main casing in embodiment 4 of the present invention;

fig. 4-2 is a schematic structural diagram of a spring piece according to embodiment 4 of the present invention;

FIG. 4-3 is a schematic structural view of a separator in example 4 of the present invention;

fig. 4-4 are schematic structural diagrams of a main housing combined by two cases in embodiment 4 of the present invention;

FIGS. 4 to 5 are schematic views showing the structure of a boss in example 4 of the present invention;

FIG. 5-1 is a schematic structural view of a main casing in embodiment 5 of the present invention;

FIG. 5-2 is a schematic view showing the structure of a spring in embodiment 5 of the present invention;

FIGS. 5 to 3 are schematic views showing the structure of another spring in embodiment 5 of the present invention;

fig. 5-4 are schematic structural views of a main housing combined by two cases in embodiment 5 of the present invention;

fig. 6-1 to 6-3 are schematic views of various possible structures of the flexible battery pack in embodiment 6 of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," and the like in the description and in the claims, and in the above-described drawings, are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The following will explain details by way of specific examples.

To solve the problems of the prior art, the present invention provides a flexible battery pack, comprising: a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly; the battery core assembly comprises at least two battery cores and flexible connecting pieces used for electrically connecting the adjacent battery cores; the protective housing includes two at least main casings and is used for connecting the structure between the shell of adjacent main casing, the main casing is used for the holding and protects electric core, structure can stretch, buckle or twist and be used for protecting between the shell flexible connector.

The flexible battery pack is a stretchable, bendable, twistable, flexible stretchable battery pack with a flexible stretchable protective shell. The flexible stretchable battery pack can be formed by connecting 2 or more than 2 battery cells in a group in a series, parallel or series-parallel combination mode.

The battery core can adopt a disposable battery or a rechargeable battery, the battery type can comprise a lithium ion battery, and the battery form can comprise a soft package battery, a button battery, an aluminum shell battery, a steel shell battery and the like. Particularly, the battery cell can adopt a rigid battery cell, and the flexible battery pack is formed by connecting and combining a flexible connecting piece and a flexible stretchable protective shell. Of course, the battery cell may also adopt flexible electrical property.

The flexible Battery pack may further include a power Management circuit board, i.e., a BMS (Battery Management System) board, of which individual cells may or may not be connected to the BMS board.

The protective housing can be used to protect electric core and BMS, makes flexible group battery have tensile, resistance to compression, resistant falling, resistant deformation, resistant performance such as extrusion.

Furthermore, the flexible battery pack can further comprise a sheath wrapped outside the protective shell, wherein the sheath is made of an elastic material and can return to an original state under the assistance of the sheath after the flexible battery pack is stretched. The outer skin can be made of textile fabric, silica gel, leather, latex and the like, has the performances of elasticity, waterproofness, shock resistance, falling resistance and the like, and can play a role in protecting the flexible battery pack.

The flexible battery pack of the present invention has been generally described above, and the following examples further illustrate the components of the flexible battery pack in detail. It should be understood that the following examples are only for the purpose of facilitating understanding of the present invention, and are not intended to limit the present invention.

[ example 1 ] Flexible connecting piece

Referring to fig. 1-1 to 1-4, optionally, the flexible connecting member includes two connecting ends 11 and a connecting wire 12 connected between the two connecting ends 11, and the connecting wire 12 is bent multiple times to form a planar deformation structure or a three-dimensional spring structure. The two connecting ends 11 are used for connecting two battery cells. The plane deformation structure or the three-dimensional spring structure realizes flexible stretching.

Optionally, the planar deformation structure is a spiral structure such as an elliptical spiral structure, a circular spiral structure, or a corrugated structure, or other similar structures.

Optionally, the three-dimensional spring structure is a circular, flat or special-shaped spring structure.

Optionally, an included angle is formed between the plane where the plane deformation structure is located and the extending direction of the two connecting ends, and the included angle ranges from 0 degree to 180 degrees.

Optionally, the performance requirements of the flexible connector include: electrically connected, stretchable, bendable, twistable, superelastic, etc.

The material of the flexible connecting element should have high conductivity, and optionally, the material may be pure conductive metal, conductive alloy, conductive fiber, conductive rubber, conductive silica gel, conductive plastic, and the like. Preferably, the flexible connecting piece can be made of copper-zinc alloy, copper-nickel alloy and other materials.

Referring to fig. 1-1 to 1-4, several different configurations of flexible connectors are shown, respectively.

In some embodiments, as shown in fig. 1-1, the flexible connection member includes a connection line of an elliptical spiral structure and two connection ends at two ends of the connection line, and the extending directions of the two connection ends form an included angle with the plane of the elliptical spiral structure, thereby forming a flexible connection member of a three-dimensional elliptical spiral structure.

In some embodiments, as shown in fig. 1-2, the flexible connection member includes a connection line of a circular spiral structure and two connection ends at two ends of the connection line, and the extending directions of the two connection ends form an included angle with the plane of the circular spiral structure, so as to form a flexible connection member of a three-dimensional circular spiral structure.

The structures shown in fig. 1-1 and 1-2, collectively referred to as a three-dimensional spiral structure, have a certain included angle between the extending direction of the two connecting ends and the plane of the spiral structure, and the included angle is in the range of 0-180 degrees.

As shown in fig. 1-3, in some embodiments, the flexible connecting element includes a connecting line of a corrugated structure and two connecting ends at two ends of the connecting line, and the extending directions of the two connecting ends form a certain included angle with the plane of the corrugated structure, the included angle is in the range of 0 to 180 degrees, thereby forming a flexible connecting element of a three-dimensional corrugated structure. The wavy line structure simulates the shape when a snake crawls, and can be called as a snake shape, so the structural shape of the flexible connecting piece can also be called as a three-dimensional snake-shaped structure.

As shown in fig. 1-4, in some embodiments, the flexible connection member includes a connection line of a spring structure and two connection ends at two ends of the connection line, wherein the spring structure may be a circular shape, or a flat shape, a square shape, a rectangular shape, a shaped spring, etc., and may be a tension spring or a compression spring according to the function.

In the embodiment of the invention, the flexible connecting piece can be used in an exposed manner, and a protective layer or a coating can also be formed through surface treatment, the protective layer is prepared by electroplating, electrophoresis, spraying, mechanical polishing, chemical treatment, surface heat treatment, PVD, polishing and the like, and the coating can be made of metal, ceramic, glass, resin, plastic and the like. Preferably, the plating layer is formed using a metal material such as zinc, tin, chromium, and nickel.

In the embodiment of the invention, the connecting end of the flexible connecting piece is connected with the electrode of the battery cell, and the connecting mode can be different modes such as welding, contact connection, gluing and the like.

[ example 2 ] protective housing

Referring to fig. 2-1, the protective casing includes at least two main casings 21 and an inter-casing structure for connecting adjacent main casings, where the main casings 21 are used to accommodate and protect the battery cells, and the inter-casing structure can be stretched, bent, or twisted and is used to protect the flexible connecting members.

Alternatively, as shown in fig. 2-1, the main housing 21 includes two cases 210 that are fastened to each other, and the two cases 210 are substantially symmetrical and fastened together to form the hollow main housing 21. The inner space of the main housing 21 is used for accommodating one or more battery cells. The side wall of the main housing 21, or the side wall of the box 210, is provided with an opening 211 allowing the flexible connection member to pass through.

Alternatively, as shown in fig. 2-2 and 2-3, the inter-can structure includes bend-limiting tabs 22 and pull-limiting tabs 23. Optionally, the bending limiting sheet 22 and the pull limiting sheet 23 are both in an i-shaped structure, and the width of the bending limiting sheet 22 is greater than the width of the pull limiting sheet 23. The width of the end portion of the I-shaped structure is larger than that of the middle portion.

Optionally, as shown in fig. 2-1, the bottom of the box body 210 is provided with a bend-limiting piece groove 212 and a pull-limiting piece groove 213 respectively, the end of the bend-limiting piece 22 falls into and is slidably limited in the bend-limiting piece groove 212, and the end of the pull-limiting piece 23 falls into and is slidably limited in the pull-limiting piece groove 213; since the bending-restricting pieces 22 and the pulling-restricting pieces 23 are slidable, bendable, and twistable with respect to the case body 210, the protective case formed by connecting the bending-restricting pieces 22 and the pulling-restricting pieces 23 to the main case 21 is a flexible and stretchable protective case.

Further, as shown in fig. 2 to 4, the main housing may further include a spacer 24, the spacer 24 is disposed at the bottom of the case 210 and is used for insulating the battery cell accommodated in the main housing from the bottom of the case 210, the bend limiter 22 and the pull limiter tab 23 are located between the spacer 24 and the bottom of the case 210, and the spacer 24 is further used for pressing and fixing the bend limiter tab 22 and the pull limiter tab 23 at the bottom of the case 210.

As shown in fig. 2 to 5, is a schematic structural view of an implementation mode in which two main housings 21 are connected to each other through an inter-housing structure including a bending-restricting piece 22 and a pulling-restricting piece 23.

Further, the two cases 210 forming one main housing 21 can be connected by one or more of the following connection methods, for example: the clamping groove is connected in a structural mode, an adhesive connection mode, an ultrasonic welding connection mode, a resistance welding connection mode, a nail connection mode, an insertion connection mode and the like, and the clamping groove is not limited herein.

Alternatively, as shown in fig. 2 to 6, the connection surfaces of the two cases 210 forming one main housing 21 may adopt a slot structure, wherein a groove is formed on the connection surface of one case 210, a protrusion matching the groove is formed on the connection surface of the other case 210, and the two cases 210 are connected to form the main housing 21 by the groove and the protrusion. Optionally, the card slot structural connection may also be combined with other connection manners, for example, when the card slot structural connection is adopted, glue may be applied to the connection surface of the two box bodies 210 or ultrasonic welding or resistance welding may be performed to connect the two box bodies 210, so as to realize firm connection of the two box bodies 210.

Optionally, the box 210 may be further designed with side bosses 215 for carrying and fixing the spacers, which facilitates the spacers 24 to be glued or welded or otherwise fixed to the main housing 21.

Optionally, the upper and lower bottom surfaces of the main casing 21 both adopt dome structures, or the box body 210 adopts an internal dome structure, that is, the depth of the central area of the bottom of the box body is greater than that of the peripheral area of the bottom, so that a part of cavities are formed between the battery cell and the upper and lower bottom surfaces of the main casing, and the purpose is to prevent the battery cell from being touched due to a small amount of deformation in the pressing process of the battery pack, thereby achieving the purpose of protecting the battery cell.

As described above, the protective case of the present embodiment mainly includes the main case, the bending-limiting piece, the pulling-limiting piece, and the spacer. The main shell is a hollow cube formed by buckling two box bodies, and the side wall of the hollow cube is provided with an opening so that the flexible connector can pass through the opening.

The bottom of the main shell is provided with a groove, so that the bending limiting sheet and the pulling limiting sheet can slide in the groove. The groove can be T-shaped and is matched with the end parts of the I-shaped bending limiting sheet and the pulling limiting sheet. The bending angle, the stretching length and the twisting angle between the main housings can be controlled by adjusting the size of the groove.

The main housing may be made of steel, aluminum, PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene), PC + ABS, ceramic, iron-nickel alloy, nickel-titanium alloy, iron-cobalt alloy, iron-nickel-cobalt alloy, high-speed steel, low alloy steel, glass, plastic, resin, plastic, etc. The preparation process of the main shell can adopt the following processes: metal powder metallurgy, injection molding, machining, stamping or welding processes, and the like.

The main shell can be used in an exposed mode, and surface treatment can also be carried out. The surface treatment process may include surface passivation, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying, etc. The surface treatment material may include teflon, PP, ABS, PC + ABS, glass, ceramic, insulating varnish, resin, plastic, and the like. The surface treatment is used to insulate, wear-resistant, and corrosion-resistant the main housing. Optionally, the surface treatment forms a coating with a thickness of between 10-50 um.

The I-shaped bending limiting sheet can support external materials in the processes of stretching, bending and twisting, so that a deformation space is manufactured for the flexible connector, and the flexible connector is protected from being extruded.

The length of the H-shaped limiting pull piece can be adjusted to control the stretching length of the two adjacent left and right main shells, and the width and the thickness of the limiting pull piece can be adjusted to control the torsion angle of the main shells.

The material of the limiting pull sheet (limiting bend sheet) can be steel, aluminum, PC, ABS, PC + ABS, ceramics, iron-nickel alloy, nickel-titanium alloy, iron-cobalt alloy, iron-nickel-cobalt alloy, high-speed steel, low-alloy steel, glass, plastic, resin, plastics and the like. The preparation process of the limit pull piece can adopt metal powder metallurgy, injection molding, machining, stamping, welding, die casting, etching and the like.

The pull limiting sheet (bend limiting sheet) can be used in an exposed state or can be subjected to surface treatment, and the surface treatment process can comprise surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying and the like. The surface treatment material may include teflon, PP, ABS, PC + ABS, glass, ceramic, insulating varnish, resin, plastic, and the like. Optionally, the surface treatment forms a coating on the surface having a thickness of between 10-50 um.

The pull limiting sheet (bending limiting sheet) is used for limiting the stretching and bending degree, and the flexible connector can be protected. The required performance of the limiting pull sheet (bending limiting sheet) is superelasticity, and preferably, iron-nickel alloy, iron-carbon alloy, nickel sheets and the like can meet higher requirements.

The spacing block can prevent electric core and flexible connector and main casing body contact, closely links to each other with main casing inner wall bulge simultaneously and produces the airtight recess in four sides and provides the activity space for limit bent piece and limit pulling-on piece.

The material of the spacer can be steel, aluminum, PC, ABS, PC + ABS, ceramic, iron-nickel alloy, nickel-titanium alloy, iron-cobalt alloy, iron-nickel-cobalt alloy, high-speed steel, low alloy steel, glass, plastic, resin, plastic and the like. The preparation process of the isolating sheet can adopt metal powder metallurgy, injection molding, machining, stamping, welding, die casting, etching and the like.

The spacer can be used in an exposed state or subjected to surface treatment, and the surface treatment process can comprise surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying and the like. The surface treatment material may include teflon, PP, ABS, PC + ABS, glass, ceramic, insulating varnish, resin, plastic, and the like.

Further, the outside of the flexible and stretchable protective shell can be wrapped by the outer skin, and the outer skin has elasticity, waterproofness, shock resistance and falling resistance. The outer skin material can be textile fabric, silica gel, leather, latex, etc.

[ example 3 ] protective housing

Referring to fig. 3-1, the protective casing includes at least two main casings 31 and an inter-casing structure for connecting adjacent main casings, where the main casings 31 are used to accommodate and protect the battery cells, and the inter-casing structure can be stretched, bent, or twisted and is used to protect the flexible connecting members.

Alternatively, as shown in fig. 3-1, the main housing 31 includes two cases 310 that are fastened to each other, and the two cases 310 are substantially symmetrical and fastened together to form the hollow main housing 31. The inner space of the main housing 31 is used for accommodating one or more battery cells. The side wall of the main housing 31, or the side wall of the box 310, is provided with an opening 311 for allowing the flexible connection member to pass through.

As shown in fig. 3-2, the inter-shell structure includes a spring plate 32. Optionally, an elongated slot 321 is disposed in the middle of the elastic sheet 32, a convex body 312 is disposed in the middle of the opening 311 of the side wall of the box body 310, a corresponding elastic sheet groove 313 is disposed at the bottom of the box body 310, the elongated slot 321 of the elastic sheet 32 is sleeved on the convex body 312, and the end of the elastic sheet 32 falls into and is slidably limited in the elastic sheet groove 313; since the elastic piece 32 is slidable, bendable, and twistable with respect to the case 310, the protective case formed by connecting the elastic piece 32 to the main case 31 is a flexible and stretchable protective case.

Further, as shown in fig. 3-3, the main casing may further include a spacer 34, the spacer 34 is disposed at the bottom of the case 310, the spacer 34 is used for separating the battery cell accommodated in the main casing from the bottom of the case 310, the elastic sheet 32 is located between the spacer 34 and the bottom of the case 310, and the spacer 24 is further used for pressing and fixing the elastic sheet 32 at the bottom of the case 310.

Further, the two cases 310 forming one main housing 31 can be connected by one or more of the following connection methods, for example: the clamping groove is connected in a structural mode, an adhesive connection mode, an ultrasonic welding connection mode, a resistance welding connection mode, a nail connection mode, an insertion connection mode and the like, and the clamping groove is not limited herein.

Alternatively, as shown in fig. 3 to 4, the connection surfaces of the two cases 310 forming one main housing 31 may adopt a slot structure, wherein a groove is formed on the connection surface of one case 310, a protrusion matching with the groove is formed on the connection surface of the other case 310, and the two cases 310 are connected with each other to form the main housing 31. Optionally, the card slot structural connection may also be combined with other connection manners, for example, when the card slot structural connection is adopted, glue may be applied to the connection surface of the two box bodies 310, or ultrasonic welding or resistance welding may be performed to connect the two box bodies 310, so as to realize firm connection of the two box bodies 310.

Optionally, as shown in fig. 3-1, the box body 310 may be further designed with side bosses 315 for carrying and securing the spacers, which facilitates the spacers 34 to be glued or welded or otherwise secured to the main housing 31.

Optionally, the upper and lower bottom surfaces of the main casing 31 both adopt dome structures, or the box body 310 adopts an internal dome structure, that is, the depth of the central area of the bottom of the box body is greater than that of the peripheral area of the bottom, so that a part of cavities are formed between the battery cell and the upper and lower bottom surfaces of the main casing, and the purpose is to prevent the battery cell from being touched due to a small amount of deformation in the pressing process of the battery pack, thereby achieving the purpose of protecting the battery cell.

As described above, the protective case of the present embodiment mainly includes the main case, the elastic sheet, and the spacer. The main shell is a hollow cube formed by buckling two box bodies, and the side wall of the hollow cube is provided with an opening so that the flexible connector can pass through the opening.

The bottom of the main shell is provided with a groove, so that the elastic sheet can slide in the groove. The bending angle, the stretching length and the twisting angle between the main housings can be controlled by adjusting the size of the groove. The side wall of the main shell can be provided with a convex boss structure to limit the sliding range of the elastic sheet.

The main shell can be used in an exposed state or can be subjected to surface treatment, and the surface treatment process can comprise surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying and the like. The surface treatment material may include teflon, PP, ABS, PC + ABS, glass, ceramic, insulating varnish, resin, plastic, and the like.

The middle of the elastic sheet is provided with one or more hollowed-out elongated slots. The flexible stretchable connector can support the outer material during stretching, bending and twisting, and a deformation space is formed for the flexible stretchable connector to protect the flexible stretchable connector from being squeezed. The elastic sheet can control the stretching length and the bending angle of the main shell body by adjusting the length and the length of the hollow elongated slot, and can control the torsion angle of the main shell body by adjusting the width, the thickness and the width of the hollow elongated slot.

The spring plate can be made of steel, aluminum, PC, ABS, PC + ABS, ceramic, iron-nickel alloy, nickel-titanium alloy, iron-cobalt alloy, iron-nickel-cobalt alloy, high-speed steel, low-alloy steel, glass, plastic, resin, plastic and the like. The preparation process of the limit pull piece can adopt metal powder metallurgy, injection molding, machining, stamping, welding, die casting, etching and the like.

The elastic sheet can be used in an exposed state or subjected to surface treatment, and the surface treatment process can be surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying or the like. The surface treatment material can be Teflon, PP, ABS, PC + ABS, glass, ceramic, insulating paint, resin, plastic or the like.

The spacer can be used in an exposed state or subjected to surface treatment, and the surface treatment process can be surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying and the like. The surface treatment material can be Teflon, PP, ABS, PC + ABS, glass, ceramic, insulating paint, resin, plastic and the like.

[ example 4 ] protective housing

This example is based on a modification of example 3.

As shown in fig. 4-1, the protective casing includes at least two main casings 41 and an inter-casing structure for connecting adjacent main casings, where the main casings 41 are used for accommodating and protecting the battery cells, and the inter-casing structure can be stretched, bent, or twisted and is used for protecting the flexible connecting members.

Optionally, the main housing 41 includes two cases 410 that are fastened to each other, and the two cases 410 are substantially symmetrical and fastened together to form the hollow main housing 41. The inner space of the main housing 41 is used for accommodating one or more battery cells. The side walls of the main housing 41 or the side walls of the box 410 are provided with openings 411 allowing the flexible connectors to pass through.

As shown in fig. 4-2, the inter-shell structure includes a spring 42. Optionally, an elongated slot 421 is disposed in the middle of the elastic sheet 42, a protrusion 412 is disposed in the middle of the opening 411 of the side wall of the box body 410, a corresponding elastic sheet groove 413 is disposed at the bottom of the box body 410, the elongated slot 421 of the elastic sheet 42 is sleeved on the protrusion 412, and the end of the elastic sheet 42 falls into and is slidably limited in the elastic sheet groove 413; since the elastic piece 42 is slidable, bendable, and twistable with respect to the case 410, the protective case formed by connecting the main case 41 with the elastic piece 42 is a flexible and stretchable protective case.

Further, as shown in fig. 4-3, the main casing may further include a spacer 44, the spacer 44 is disposed at the bottom of the case 410, the spacer 44 is used for separating the battery cell accommodated in the main casing from the bottom of the case 410, the elastic sheet 42 is located between the spacer 44 and the bottom of the case 410, and the spacer 44 is further used for pressing and fixing the elastic sheet 42 at the bottom of the case 410.

Further, the two cases 410 forming one main housing 41 can be connected by one or more of the following connection methods, for example: the clamping groove is connected in a structural mode, an adhesive connection mode, an ultrasonic welding connection mode, a resistance welding connection mode, a nail connection mode, an insertion connection mode and the like, and the clamping groove is not limited herein.

As shown in fig. 4-4, the card slot structure connection is taken as an example: the connection surface of the two cases 410 forming one main case 41 may adopt a slot structure, wherein the connection surface of one case 410 is provided with a groove, the connection surface of the other case 410 is provided with a protrusion matching with the groove, and the two cases 410 are connected with each other through the groove and the protrusion to form the main case 41. Optionally, the card slot structural connection may be combined with other connection modes, for example, when the card slot structural connection is adopted, glue may be applied to the connection surface of the two cartridges 410, or ultrasonic welding or resistance welding may be performed to connect the two cartridges 410, so as to realize firm connection of the two cartridges 410.

Further, a boss 414 is formed in the spring plate groove 413, and the number of the bosses 414 may be one or two or more. In application, the boss 414 is embedded in the long groove 421 of the elastic sheet 42 for limiting the sliding range of the elastic sheet 42.

Alternatively, the boss 414 may or may not be connected to the lower end of the boss 412. For example, the boss 414 may be a semi-cylindrical structure coupled to the lower end of the boss 412.

Optionally, as shown in fig. 4-5, the boss 414 may be designed to have a size larger at the upper end than at the lower end to form a boss locking structure, so as to prevent the elastic sheet 42 from falling out during the sliding process. Moreover, the side surface of the boss 414 from the lower end to the upper end can adopt a rounded transition structure, so as to avoid being stuck in the sliding process. A rounded transition structure means that the size changes gradually without abrupt changes. Moreover, the top surface of the boss 414 may also be used to carry and secure the spacer 44, making it easier to secure the spacer 44.

Optionally, the case 410 may be further designed with side projections 415 for carrying and securing the spacers, which facilitates the spacers 44 to be glued or welded or otherwise secured to the main housing 41.

Optionally, the case 410 is of an internal dome structure, that is, the depth of the central area of the bottom is greater than that of the peripheral area of the bottom, so that a part of cavity is formed between the battery cell and the upper and lower bottom surfaces of the main case, and the purpose that the battery pack deforms a little in the pressing process so as not to touch the battery cell is achieved, and the purpose of protecting the battery cell is achieved.

[ example 5 ] protective housing

Referring to fig. 5-1, the protective casing includes at least two main casings 51 and an inter-casing structure for connecting adjacent main casings, where the main casings 51 are used for accommodating and protecting the battery cells, and the inter-casing structure can be stretched, bent, or twisted and is used for protecting the flexible connecting member.

Alternatively, as shown in fig. 5-1, the main housing 51 includes two cases 510 that are fastened to each other, and the two cases 510 are substantially symmetrical and fastened together to form the hollow main housing 51. The inner space of the main housing 51 is used for accommodating one or more battery cells. The side walls of the main housing 51, or the side walls of the box 510, are provided with openings 511 for allowing the flexible connectors to pass through.

As shown in fig. 5-2, the inter-shell structure includes a hollow spring 52, and the flexible connector passes through the hollow lumen of the spring 52. The spring 52 may be a square, rectangular spring.

As shown in fig. 5-3, the spring 52 may also be a circular spring.

Of course, the spring 52 may take other shapes.

Further, the two cases 510 forming one main housing 51 can be connected by one or more of the following connection methods, for example: the clamping groove is connected in a structural mode, an adhesive connection mode, an ultrasonic welding connection mode, a resistance welding connection mode, a nail connection mode, an insertion connection mode and the like, and the clamping groove is not limited herein.

Alternatively, as shown in fig. 5-4, the connection surfaces of the two cases 510 forming one main housing 51 may adopt a slot structure, wherein a groove is formed on the connection surface of one case 510, a protrusion matching with the groove is formed on the connection surface of the other case 510, and the two cases 510 are connected to form the main housing 51 by the groove and the protrusion. Optionally, the card slot structural connection may be combined with other connection modes, for example, when the card slot structural connection is adopted, glue may be applied to the connection surface of the two box bodies 510 or ultrasonic welding or resistance welding may be performed to connect the two box bodies 510, so as to realize firm connection of the two box bodies 510.

Optionally, the box 510 may be further designed with side projections 515 for carrying and fixing the spacers, which facilitates the adhesion or welding or other fixing of the spacers 54 to the main housing 51.

Optionally, the upper and lower bottom surfaces of the main casing 51 all adopt dome structures, or the box 510 adopts an internal dome structure, that is, the depth of the central area of the bottom of the box is greater than that of the peripheral area of the bottom, so that a part of cavities are formed between the battery cell and the upper and lower bottom surfaces of the main casing, and the purpose is to prevent the battery cell from being touched due to a small amount of deformation in the pressing process of the battery pack, thereby achieving the purpose of protecting the battery cell.

The main shell can be made of steel, aluminum, PC, ABS, PC + ABS, ceramic, iron-nickel alloy, nickel-titanium alloy, iron-cobalt alloy, iron-nickel-cobalt alloy, high-speed steel, low alloy steel, glass, plastic, resin, plastic and the like. The main shell can be prepared by metal powder metallurgy, injection molding, machining, stamping, welding and the like.

The main shell can be used in a naked way or can be subjected to surface treatment, and the surface treatment process can be surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying and the like. The surface treatment material can be Teflon, PP, ABS, PC + ABS, glass, ceramic, insulating paint, resin, plastic and the like.

The spring is connected between the main housings and the flexible connector passes through the interior of the spring. The spring can support external materials in the stretching, bending and twisting processes, so that a deformation space is manufactured for the flexible connector, and the flexible connector is protected from being extruded. The spring can control the stretching length and the bending angle of the main shell by adjusting the length, and can control the torsion angle of the main shell by adjusting the width and the wire diameter.

The spring can be made of steel, aluminum, PC, ABS, PC + ABS, ceramic, iron-nickel alloy, nickel-titanium alloy, iron-cobalt alloy, iron-nickel-cobalt alloy, high-speed steel, low-alloy steel, glass, plastic, resin, plastic and the like. The spring can be prepared by metal powder metallurgy, injection molding, machining, stamping, welding, die casting, etching and the like.

The spring can be used in an exposed state or subjected to surface treatment, and the surface treatment process can be surface passivation treatment, spraying, electrophoresis, powder spraying, plastic spraying, paint baking, oil spraying, ceramic spraying and the like. The surface treatment material can be Teflon, PP, ABS, PC + ABS, glass, ceramic, insulating paint, resin, plastic and the like.

[ example 6 ] Flexible Battery pack

Referring to fig. 6-1, based on the above multiple possible implementations, in an embodiment of the present invention, the flexible battery pack may include: a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly; the cell assembly comprises at least two cells 60 and flexible connectors 10 for electrically connecting adjacent cells; the protective casing 20 includes at least two main casings 21 and an inter-casing structure for connecting adjacent main casings, where the main casings 21 are used to house and protect the battery cells 60, and the inter-casing structure can be stretched, bent, or twisted and is used to protect the flexible connecting member 10. The inter-shell structure includes, for example, bend-restraining tabs 22 and pull-restraining tabs 23.

Referring to fig. 6-2, based on the above multiple possible implementations, in an embodiment of the present invention, the flexible battery pack may include: a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly; the cell assembly comprises at least two cells 60 and flexible connectors 10 for electrically connecting adjacent cells; the protective casing 30 includes at least two main casings 31 and an inter-casing structure for connecting adjacent main casings, where the main casings 31 are used for accommodating and protecting the battery cells 60, and the inter-casing structure can be stretched, bent, or twisted and is used for protecting the flexible connecting member 10. The inter-shell structure comprises, for example, spring blades 32.

Referring to fig. 6-3, based on the above multiple possible implementations, in an embodiment of the present invention, the flexible battery pack may include: a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly; the cell assembly comprises at least two cells 60 and flexible connectors 10 for electrically connecting adjacent cells; the protective casing 50 includes at least two main casings 51 and an inter-casing structure for connecting adjacent main casings, where the main casings 51 are used for accommodating and protecting the battery cells 60, and the inter-casing structure can be stretched, bent, or twisted and is used for protecting the flexible connecting member 10. The inter-housing structure comprises, for example, a spring 52.

It should be noted that the structures shown in fig. 6-1 to 6-3 are for illustration only and are not intended to limit the present invention.

In summary, the embodiment of the invention provides a flexible battery pack. According to the technical scheme, the embodiment of the invention has the following advantages:

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; those of ordinary skill in the art will understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A flexible battery, comprising:

a flexible, stretchable electrical core assembly and a flexible, stretchable protective case for housing the electrical core assembly;

the battery core assembly comprises at least two battery cores and flexible connecting pieces used for electrically connecting the adjacent battery cores;

the protective housing includes two at least main casings and is used for connecting the structure between the shell of adjacent main casing, the main casing is used for the holding and protects electric core, structure can stretch, buckle or twist and be used for protecting between the shell flexible connector.

2. The flexible battery pack of claim 1,

the flexible connecting piece comprises two connecting ends and a connecting wire connected between the two connecting ends, and the connecting wire is bent for multiple times to form a plane deformation structure or a three-dimensional spring structure.

3. The flexible battery pack of claim 2,

the plane where the plane deformation structure is located and the extending direction of the two connecting ends form an included angle.

4. The flexible battery pack of claim 2,

the plane deformation structure is an elliptical spiral structure, a circular spiral structure or a corrugated line structure;

the three-dimensional spring structure is a round, flat or special-shaped spring structure.

5. The flexible battery according to any one of claims 1-4,

the side wall of the main shell is provided with an opening allowing the flexible connecting piece to pass through.

6. The flexible battery pack of claim 5,

the structure between the shells comprises a bending limiting sheet and a pulling limiting sheet, the bottom of the main shell is provided with a corresponding bending limiting sheet groove and a corresponding pulling limiting sheet groove, the end part of the bending limiting sheet falls into and is slidably limited in the bending limiting sheet groove, and the end part of the pulling limiting sheet falls into and is slidably limited in the pulling limiting sheet groove;

the main casing body further comprises a spacer arranged at the bottom of the main casing body, the spacer is used for separating the battery cell accommodated in the main casing body from the bottom of the main casing body, and the bending limiting sheet and the pulling limiting sheet are positioned between the spacer and the bottom of the main casing body.

7. The flexible battery pack of claim 6,

the bending limiting sheet and the pulling limiting sheet are both of I-shaped structures, and the width of the bending limiting sheet is larger than that of the pulling limiting sheet.

8. The flexible battery pack of claim 5,

the shell structure comprises an elastic sheet, an elongated slot is arranged on the elastic sheet, a convex body is arranged in the middle of an opening of the side wall of the main shell, a corresponding elastic sheet groove is arranged at the bottom of the main shell, the elongated slot of the elastic sheet is sleeved on the convex body, and the end part of the elastic sheet falls into and is limited in the elastic sheet groove in a sliding manner;

the main casing body further comprises a spacer arranged at the bottom of the main casing body, the spacer is used for isolating the battery cell accommodated in the main casing body from the bottom of the main casing body, and the elastic sheet is positioned between the spacer and the bottom of the main casing body.

9. The flexible battery pack of claim 8,

a boss is formed in the elastic sheet groove and embedded into the long groove of the elastic sheet to limit the sliding range of the elastic sheet.

10. The flexible battery pack of claim 5,

the shell-to-shell structure is a hollow spring, and the flexible connecting body penetrates through a hollow inner cavity of the spring.