CN220710461U

CN220710461U - Battery, paster structure and power consumption device

Info

Publication number: CN220710461U
Application number: CN202322080726.8U
Authority: CN
Inventors: 兰福泉; 李兴星; 陈旭斌; 李�杰; 张旭
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-04-02
Anticipated expiration: 2033-08-03

Abstract

The embodiment of the utility model provides a battery, a patch structure and an electric device, wherein the battery comprises the patch structure and at least two battery monomers, and the at least two battery monomers are distributed along a first direction and are close to each other; the patch structure is attached to at least two battery monomers; the patch structure is formed with a first region and a second region, the first region having a tensile strength in the first direction greater than a tensile strength of the second region in the first direction. By arranging the first area and the second area with different tensile strengths, the whole patch structure can deform along the acting force under the condition of receiving the stretching acting force, so that the probability that the patch structure is separated from the battery monomer in the process of expanding the battery monomer and the battery monomer cannot be heated is reduced, and the service life of the patch structure is prolonged; so that the components with functionality on the patch structure can be arranged in the first area to reduce the probability of functional damage caused by stretching of the patch structure.

Description

Battery, paster structure and power consumption device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery, a patch structure and an electric device.

Background

The low temperature environment may adversely affect the discharge performance of the battery cell. Therefore, it is necessary to heat the battery cell to improve the operation performance of the battery cell in a low temperature environment.

The patch structure with the heating function is generally applied to the surface of the battery cell, electric energy is converted into heat energy through the patch structure, and the heat is conducted to the battery cell, so that the purpose of heating the battery cell is achieved.

However, the battery cell is heated and then expands due to the temperature rise, so that the patch structure attached to the surface of the battery cell is subjected to tensile force, and the patch structure is deformed and broken, so that the heating purpose cannot be normally achieved.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a patch structure, a battery, and an electric device that can reduce the probability of detachment from a battery cell due to swelling of the battery cell.

In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:

an embodiment of the present utility model provides a battery including:

at least two battery cells which are distributed along a first direction and are close to each other;

The patch structure is attached to at least two battery monomers; the patch structure is formed with a first region and a second region, wherein the tensile strength of the first region in the first direction is greater than that of the second region in the first direction. By arranging the first area and the second area with different tensile strengths, on one hand, the whole patch structure can deform along the acting force under the condition of receiving the stretching acting force, so that the probability that the patch structure is separated from the battery monomer in the process of expanding the battery monomer and the battery monomer cannot be heated is reduced, the probability that the heating sheet is damaged due to overhigh temperature and the fact that the heating sheet is pulled and broken is reduced, and the service life of the patch structure is prolonged; on the other hand, by providing two portions having different tensile strengths, a component having functionality on the patch structure can be provided in the first region to reduce the chance of functional failure due to stretching of the patch structure.

In some embodiments, a part of the first region is located at one side of the second region in the first direction, a part of the first region is located at the other side of the second region in the first direction, and two parts of the first region located at two sides of the second region are integrally formed. So, make all first regions on the paster structure can connect and form integral type structure, be favorable to realizing that the part that has the functionality on the paster structure is arranged in succession along first direction, both be favorable to simplifying the structure of paster structure, be favorable to improving on the paster structure along first direction and a plurality of battery monomer area of contact again.

In some embodiments, the second areas are at least two, and all the second areas are spaced apart along the first direction. In this way, on the one hand, it is advantageous to make each second region be configured corresponding to the arrangement of each battery cell, respectively, so that the stretching of each second region along the first direction is compatible with the expansion of each battery cell along the first direction; on the other hand, it is also convenient that the first region between the adjacent two second regions is arranged corresponding to the battery cell.

In some embodiments, at least a portion of the second region is located between two adjacent ones of the battery cells. Therefore, the contact area between the first area on the patch structure and the battery cell is favorably improved.

In some embodiments, a weak window is formed in the second area, and the weak window is a score or a crack. Therefore, the material on the patch structure is not required to be removed additionally in the preparation process, so that the production process is simplified, the waste is not required to be treated in an additional step, the production efficiency is improved, and the production cost is reduced.

In some embodiments, the weak window extends along a second direction, and the second direction intersects the first direction, so that a gap size formed by separating two side edges of the weak window after the weak window is stretched in the second area is improved, and therefore, the ultimate tensile deformation of the patch structure is increased, and the probability of fracture of the patch structure is reduced.

In some embodiments, at least two weak windows in each second region are provided, and at least two weak windows are spaced along the second direction, so as to further increase the ultimate tensile deformation of the patch structure.

In some embodiments, the separation between at least one end of the frangible window along the second direction and the edge of the patch structure along the second direction is no more than 5mm. Therefore, the overall structural strength of the first area between the edge of the patch structure along the second direction and the weak window is reduced, the extending direction of tearing of the weak window is guided, the weak window can be torn preferentially along the second direction, and the probability that the weak window is torn along other directions to affect the functions of the patch structure is reduced.

In some embodiments, the patch structure further forms a crack stop region disposed on a side of the second region in the second direction to limit tearing of the first region proximate to the second region. The crack-arrest region can reduce the probability of stress concentration at one end of the weak window provided with the crack-arrest region or improve the structural strength of the end, so that the trend that the crack-arrest region is torn to the first region continuously at the end is reduced, the probability of damage to the patch structure caused by tearing of the first region is reduced, and the probability of complete fracture and separation of the patch structure caused by continuous extension of the crack-arrest region is reduced.

In some embodiments, the crack stop region is a score or a slit, the crack stop region is circular arc shaped with the concave side facing the second region;

or, the crack stop area is a round hole. In this way, the chance of the weakened area continuing to tear and extend due to stress concentrations is reduced.

In some embodiments, the radius of the crack arrest region is no more than 5mm. Therefore, the probability of reducing the strength of the whole structure of the patch structure due to the oversized size of the crack-stopping area is reduced, and the probability of breakage of the patch structure due to the fact that the crack-stopping area is torn after the patch structure is stretched is reduced.

In some embodiments, the second areas are divided into at least two groups, the second areas in each group are arranged at intervals along the first direction, the second areas in each group are arranged along the second direction, in two adjacent groups, a part of the second areas in one group extends to a position between two adjacent second areas in the other group, and the second areas in the two groups are alternately arranged along the first direction. Therefore, the size of the second area in each group is prolonged under the condition that the size of the patch structure along the extending direction of the second area is certain, and the method is beneficial to further increasing the ultimate tensile deformation of the patch structure along the extending direction of the patch structure and reducing the fracture probability of the patch structure while adapting to the arrangement mode of the battery monomers.

In some embodiments, the patch structure includes a substrate and a functional member, the first region and the second region are located on the substrate, the functional member is attached to the substrate, and the functional member is used for heating the battery cell. So, through the cooperation of substrate and function piece, on satisfying the basis that realizes the heating function to the battery monomer, reduced the function piece and taken place tensile and lead to the probability of damage along first direction, reduced the risk of taking place the short circuit between battery monomer and the function piece.

In some embodiments, the number of the substrates is two, two layers of the substrates are stacked, the functional element is sandwiched between two layers of the substrates, and the functional element is disposed in the first area. Therefore, the probability of short circuit caused by direct contact and electrical conduction of the functional piece and other structures in the battery can be further reduced, and meanwhile, the functional piece corresponds to the first area, so that deformation of the functional piece along the first direction is reduced, and the probability of damage of the functional piece due to stretching deformation is reduced.

In some embodiments, the patch structure includes an adhesive member attached to a side surface of one of the layers of the base material facing away from the functional member, so that the patch structure can be adhered to the battery cell.

In some embodiments, the adhesive has an adhesive viscosity of 4N/cm ² To 10N/cm ² . On the one hand, the adhesive part and the base material and the adhesive part and the battery monomer have enough adhesive force so as to reduce the probability of relative sliding between the adhesive part and the base material and between the adhesive part and the battery monomer, and the patch structure is kept in a fixed state; on the other hand, the patch structure is convenient to tear off from a preset installation position so as to facilitate subsequent maintenance and recovery.

In some embodiments, the adhesive member is formed with a third region and a fourth region, the third region having a tensile strength in the first direction that is greater than a tensile strength of the fourth region in the first direction. Therefore, under the action of the stretching force of the battery monomer along the first direction, the fourth area can have larger deformation amount along the first direction compared with the third area, so that the inhibition effect of deformation of the patch structure along the first direction due to the self-adhesion of the adhesive piece is reduced, and the deformation amount of the patch structure along the first direction is improved.

In some embodiments, the third region is attached to the first region, and the fourth region is attached to the second region, so that on one hand, it is beneficial to realize that the second region and the fourth region are synchronously deformed in a stretching manner along the first direction, so that the probability of warping, torsion and other problems of the patch structure in the stretching process due to the constraint of the third region on the second region and the first region on the fourth region is reduced, and the probability of damage to the functional parts is reduced; on the other hand, the second area and the fourth area are beneficial to realizing the same position, same size and same shape on the projection along the thickness direction of the patch structure, and further beneficial to synchronously manufacturing and forming the second area and the fourth area at one time, thereby simplifying the manufacturing process and improving the production efficiency;

And/or the fourth area is a score or a crack, the fourth area extends along a second direction, and the second direction intersects with the first direction, so that the inhibiting effect on the tensile deformation of the patch structure due to the viscosity of the adhesive piece is reduced.

In some embodiments, the patch structure includes a guard member overlying a surface of another layer of the substrate facing away from the functional member, the guard member having a tensile strength in the first direction that is less than a tensile strength of the first region in the first direction. The protective piece plays a certain protective role on the base material, avoids the base material from being directly exposed to cause damage easily, reduces the probability of tearing the base material under smaller stretching acting force, and is beneficial to improving the overall structural strength of the patch structure.

In some embodiments, the adhesion viscosity between the guard and the substrate is no more than 2N/cm ² The protective piece and the base material are not easy to separate.

The embodiment of the utility model also provides a patch structure, wherein a first area and a second area are formed in the patch structure, and the tensile strength of the first area in the first direction is larger than that of the second area in the first direction. By arranging the first area and the second area with different tensile strengths, on one hand, the whole patch structure can deform along the acting force under the condition of receiving the stretching acting force, so that the probability that the patch structure is separated from the battery monomer in the process of expanding the battery monomer and the battery monomer cannot be heated is reduced, the probability that the heating sheet is damaged due to overhigh temperature and the fact that the heating sheet is pulled and broken is reduced, and the service life of the patch structure is prolonged; on the other hand, by providing two portions having different tensile strengths, a component having functionality on the patch structure can be provided in the first region to reduce the chance of functional failure due to stretching of the patch structure.

The embodiment of the utility model also provides an electric device, which comprises the battery in any one of the previous embodiments, wherein the battery is used as a power supply of the electric device. Therefore, the battery monomer is heated and expanded by the patch structure in a low-temperature environment, the probability that a heat transfer path between the patch structure and the battery monomer is damaged due to relative movement between the patch structure and the battery monomer is reduced, and the heating efficiency is improved. The probability of normal power supply of a battery in the power utilization device is improved.

Drawings

FIG. 1 is a schematic view of a vehicle according to an embodiment of the utility model;

FIG. 2 is an exploded view of a battery according to an embodiment of the present utility model;

fig. 3 is a schematic layout diagram of a battery cell and a patch structure according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a battery cell according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a patch structure according to a first embodiment of the present utility model;

FIG. 6 is a schematic diagram of a patch structure according to a second embodiment of the present utility model;

FIG. 7 is a schematic diagram of a patch structure according to a third embodiment of the present utility model;

FIG. 8 is a schematic diagram of a patch structure according to a fourth embodiment of the present utility model;

fig. 9 is a schematic diagram of a patch structure according to a fifth embodiment of the present utility model;

fig. 10 is a schematic view of a patch structure according to a sixth embodiment of the present utility model;

fig. 11 is a schematic view of a patch structure according to a seventh embodiment of the present utility model;

fig. 12 is a schematic view of a patch structure according to an eighth embodiment of the present utility model;

FIG. 13 is an enlarged schematic view of the position A of FIG. 5;

FIG. 14 is an enlarged schematic view of the position B in FIG. 11;

FIG. 15 is a schematic view, partially in section, of a location of a patch structure in accordance with one embodiment of the present utility model;

fig. 16 is a schematic view, partially in section, of another location of a patch structure in accordance with an embodiment of the present utility model.

Description of the reference numerals

A vehicle 1000; a battery 100; a bottom cover 101; a top cover 102; a controller 200; a motor 300;

a battery cell 10; a housing 11; an end cap 12; an electrode terminal 121; an electrode assembly 13;

a patch structure 20; a second region 20a; a first region 20b; a weak window 20c; a crack arrest region 20d; a base material 21; a functional element 22; an adhesive member 23; a third region 23a; a fourth region 23b; guard 24

Detailed Description

It should be noted that, in the case of no conflict, the embodiments of the present utility model and the technical features in the embodiments may be combined with each other, and the detailed description in the specific embodiments should be understood as an explanation of the gist of the present application and should not be construed as undue limitation to the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of embodiments of the present utility model, the technical terms "first," "second," "third," etc. are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present utility model, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present utility model, the technical terms "first direction", "second direction", "lengthwise direction" orientation or positional relationship are based on the orientation or positional relationship shown in fig. 4, and the technical terms "thickness direction" orientation or positional relationship are based on the orientation or positional relationship shown in fig. 14 and 15, merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured, operated or used in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the term "contact" is to be understood in a broad sense as either direct contact or contact across an intermediate layer, as either contact with substantially no interaction force between the two in contact or contact with interaction force between the two in contact.

The following describes embodiments of the present utility model in detail.

Currently, batteries are increasingly used in life and industry. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

In a low-temperature environment, the reaction rate of an electrode surface active substance of a battery monomer in a battery is slowed down, the concentration of ions in the active substance is reduced, the balance potential of the battery is reduced, the internal resistance is increased, the discharge capacity is reduced, and even the phenomena of electrolyte freezing, incapability of discharging the battery monomer and the like can occur under the extremely low temperature condition. It is therefore necessary to heat the battery cells to reduce the adverse effect of low temperature on the discharge capacity of the battery cells.

A patch structure with a heating function is generally adopted to heat the battery cells.

Specifically, the patch structure is attached to the position, which needs to be heated, of the battery cell, and the heating sheet heats and transfers heat to the battery cell so as to heat the battery cell.

In the heating process, the battery monomer is heated and produces expansion deformation, and then exerts tensile effort to the paster structure, can lead to breaking away from between paster structure and the battery monomer and lead to heating efficiency to reduce, has the heat that the heating plate produced unable the effluvium and produces the risk of thermal runaway, can appear the too big and fracture of tensile effort that the paster structure received and then lead to the condition that the heating plate damaged inefficacy even.

An embodiment of the present utility model provides a battery, referring to fig. 4 to 14, the battery includes at least two battery cells 10 and a patch structure 20, where the at least two battery cells 10 are arranged along a first direction and are close to each other; is attached to at least two battery cells 10; the patch structure 20 has a first region 20b and a second region 20a formed therein, the first region 20b having a tensile strength in the first direction greater than the tensile strength of the second region 20a in the first direction.

The battery cell 10 refers to the smallest unit constituting the battery. In the battery, the number of the battery cells 10 may be plural, and the plurality of battery cells 10 may be connected in series, parallel, or series-parallel. The series-parallel connection refers to that the plurality of battery cells 10 are connected in series or in parallel. Of course, the battery may also be a form of forming a battery module by connecting a plurality of battery cells 10 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection.

At least two battery cells 10 are adjacent to each other along the first direction, which means that the battery cells 10 may be spaced apart from each other along the first direction; or may be attached to each other in the first direction.

The patch structure 20 is used for heating the battery cell 10, and releases heat to the battery cell 10 through the patch structure 20, so as to improve the working performance of the battery cell 10 in a low-temperature environment and reduce the probability of damage of the battery cell 10 in the low-temperature environment.

The patch structure 20 is in a sheet-like structure so that the overall structure of the patch structure 20 is more compact.

The patch structure 20 is typically in the form of resistive heating, which converts electrical energy into thermal energy for the purpose of generating heat.

The power source of the patch structure 20 is not limited, for example, the patch structure 20 is electrically connected with the battery cell 10 to directly obtain power from the battery cell 10.

It will be appreciated that the portion of the patch structure 20 that is attached to the battery cell 10 is insulative to reduce the chance of a short circuit due to contact between the battery cell 10 and the patch structure 20.

The patch structure 20 can conduct and spread heat on the battery cell 10 more widely, so that the area of heat diffusion is increased, the heating efficiency of the battery cell 10 is improved, and the probability of thermal runaway caused by empty burning of the patch structure 20 is reduced.

Tensile strength refers to the resistance of a material to maximum uniform plastic deformation.

The specific manner of measuring the tensile strength of the first region 20b and the second region 20a is not limited, for example, a part of the first region 20b or a part of the second region 20a is taken to make a bar-shaped specimen, an original cross-sectional area of the specimen perpendicular to the stretching direction is determined, both ends of the specimen in the stretching direction are fixed to a tensile tester, the specimen is stretched at a constant rate, for example, 1mm/min (millimeter per minute, millimeter/minute) at room temperature of 10 ℃ to 35 ℃, until the specimen breaks, a maximum load is recorded, and the tensile strength of the specimen is calculated according to a tensile strength formula.

It can be appreciated that since the plurality of battery cells 10 are arranged in the first direction, the plurality of battery cells 10 generally have the largest deformation amount in the first direction.

The tensile strength of the first region 20b in the first direction is greater than the tensile strength of the second region 20a in the first direction, that is, the tensile deformation of the second region 20a in the first direction after the expansion of the battery cell 10 is greater than the tensile deformation of the first region 20 b.

According to the patch structure 20 provided by the embodiment of the utility model, by arranging the first area 20b and the second area 20a with different tensile strengths, on one hand, the patch structure 20 as a whole can deform along the acting force under the condition of receiving the tensile acting force, so that the probability that the patch structure 20 is separated from the battery cell 10 in the process of expanding the battery cell 10 and cannot heat the battery cell 10 is reduced, the probability that the patch structure is damaged due to overhigh temperature and the fact that the patch structure is pulled and broken is reduced, and the service life of the patch structure 20 is prolonged; on the other hand, by providing two portions with different tensile strengths, a component having functionality on the patch structure 20 may be provided in the first region 20b to reduce the chance of functional failure due to stretching of the patch structure 20.

The specific role of the functional components present on the patch structure 20 is not limited, such as heating to heat the battery cell 10.

The battery provided by the embodiment of the utility model can be used for, but is not limited to, an energy storage power supply system, a vehicle, a ship or an aircraft and other electric devices. The power supply provided by the embodiment of the utility model has high volume energy density and reliable high sealing performance, so that the occupied space can be reduced or higher total energy can be provided/stored in a limited space, and the situation that the battery cannot work normally due to poor dust and water resistance is avoided, so that the use reliability of an energy storage power supply system and an electric device can be improved.

The battery provided by the embodiment of the utility model can be used as a battery pack in groups. The battery pack can also be used in, but not limited to, energy storage power systems, vehicles, boats or aircraft, and other electrical devices. The use of a battery pack can provide a higher total energy. Moreover, the battery pack is formed by arranging a plurality of grouped batteries in the sealed box body, thereby having more reliable dustproof and waterproof performance, and being applicable to scenes where the use environment is worse, moist and even immersed.

The embodiment of the utility model provides an electric device comprising the battery or the battery pack for providing electric energy, wherein the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

In the following embodiments, for convenience of explanation, the electric device according to an embodiment of the present application will be described by taking the vehicle 1000 as an example. The following description refers to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a vehicle 1000 according to an embodiment of the utility model. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. As shown in fig. 1, the battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present utility model, battery 100 may be used not only as an operating power source for vehicle 1000, but also as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Fig. 2 and 3 are exploded perspective views of a battery 100 according to an embodiment of the present utility model. As shown in fig. 2 and 3, the battery 100 includes a bottom cover 101, a top cover 102, and at least one battery cell 10, the top cover 102 covering over the bottom cover 101, thereby forming an accommodating space between the bottom cover 101 and the top cover 102 for placing the battery cell 10.

In the battery 100, the number of the battery cells 10 may be plural, and the plural battery cells 10 may be connected in series, parallel, or series-parallel, and series-parallel refers to both of the plural battery cells 10 being connected in series and parallel. The plurality of battery cells 10 can be directly connected in series or in parallel or in series-parallel, and then the whole body formed by the plurality of battery cells 10 is placed in the accommodating space formed by the bottom plate 1 and the cover body 2; of course, the battery 100 may be a battery module formed by connecting a plurality of battery cells 10 in series or parallel or series-parallel connection, and a plurality of battery modules are connected in series or parallel or series-parallel connection to form a whole and are accommodated in an accommodating space formed by the bottom cover 101 and the top cover 102. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 10.

In the embodiment of the present utility model, the battery cell 10 may be a secondary battery, and the secondary battery refers to the battery cell 10 that can be continuously used by activating the active material in a charging manner after the battery cell 10 is discharged.

The battery cell 10 may be a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, or the like, which is not limited by the embodiment of the utility model.

The battery cell 10 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charge and discharge of the battery cell 10, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the electrode assembly is provided with tabs (not shown) that can conduct current away from the electrode assembly. The tab includes a positive tab and a negative tab.

In some embodiments, the battery cell 10 may include a housing. The case is used to encapsulate the electrode assembly, the electrolyte, and the like. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), an aluminum-plastic film or the like.

As an example, the battery cell 10 may be a cylindrical battery cell 10, a prismatic battery cell 10, a pouch battery cell 10, or other shaped battery cells 10, and the prismatic battery cell 10 includes a square-case battery cell 10, a blade-shaped battery cell 10, a polygonal-prismatic battery, such as a hexagonal-prismatic battery, etc., without particular limitation in this application.

In some embodiments, as shown in fig. 3, the case includes a case 11 and an end cap 12, the case 11 is provided with an opening, and the end cap 12 closes the opening to form a closed space for accommodating the electrode assembly, electrolyte, and the like. The housing may be provided with one or more openings. One or more end caps may also be provided.

In some embodiments, as shown in fig. 3, at least one electrode terminal 121 is provided on the case, and the electrode terminal 121 is electrically connected to a tab (not shown). The electrode terminal 121 may be directly connected to the tab, or may be indirectly connected to the tab through a switching member. The electrode terminal 121 may be provided on the end cap 12 or may be provided on the case 11.

The following describes the battery in detail in some embodiments of the present utility model.

The relative positional relationship between the first region 20b and the second region 20a is not limited.

Referring to fig. 4 to 6, a part of the first region 20b is located at one side of the second region 20a in the first direction, a part of the first region 20b is located at the other side of the second region 20a in the first direction, and two parts of the first region 20b located at both sides of the second region 20a are integrally formed. That is, a part of the first region 20b is located at one end of the second region 20a perpendicular to the first direction to be integrally formed with the parts of the first region 20b located at both sides of the second region 20a in the first direction.

In this way, all the first areas 20b on the patch structure 20 can be connected to form an integrated structure, which is beneficial to realizing that the functional parts on the patch structure 20 are continuously arranged along the first direction, thereby being beneficial to simplifying the structure of the patch structure 20 and improving the contact area between the patch structure 20 and the plurality of battery cells 10 along the first direction.

It is understood that the arrangement of the second regions 20a is positioned in conformity with the arrangement of the respective battery cells 10.

Referring to fig. 4 to 12, the second regions 20a are exemplarily provided in at least two, and all the second regions 20a are spaced apart in the first direction. In this way, on the one hand, it is advantageous to make each second region 20a be configured corresponding to the arrangement of each battery cell 10, respectively, so that the stretching of each second region 20a in the first direction is compatible with the expansion of each battery cell 10 in the first direction; on the other hand, it is also convenient that the first region 20b between the adjacent two second regions 20a is arranged corresponding to the battery cell 10.

It will be appreciated that the region between two adjacent cells 10 requires less heating heat than the other regions.

In some embodiments, referring to fig. 4, at least a portion of the second region 20a is located between two adjacent cells 10. In this way, the contact area between the first region 20b on the patch structure 20 and the battery cell 10 is advantageously increased.

The specific manner in which the tensile strength of the second regions 20a in the first direction is achieved to be less than the tensile strength of the first regions 20b in the first direction is not limited.

Referring to fig. 5 to 12, for example, a weak window 20c is formed in the second region 20a, and the weak window 20c is a score or crack.

The weakening window 20c refers to a slit in the patch structure 20. It will be appreciated that upon expansion of the battery cell 10, the two side edges of the weak window 20c move in a first direction toward each other and form a gap under the action of tensile force, so that the second region 20a is entirely deformed in the first direction.

The score refers to a slit formed by cutting a sharp object such as a blade through the surface of the patch structure 20 so that a portion of the patch structure 20 in the thickness direction thereof is split to form a slit without penetration.

The slit means a penetrating slit formed by cutting or the like in the patch structure 20.

It will be appreciated that the score or slit is in contact with the side edges without voids in the state where the patch structure 20 is not subjected to tensile forces as the battery cells 10 expand.

The weak window 20c takes the form of a score or crack such that the portion between the two side edges of the weak window 20c does not need to be removed during the formation of the weak window 20 c. In this way, the material on the patch structure 20 does not need to be removed additionally in the preparation process, so that the production process is simplified, the waste is treated without additional steps, the production efficiency is improved, and the production cost is reduced.

It will be appreciated that the direction of extension of the frangible window 20c is compatible with the direction of extension of the patch structure 20.

Illustratively, referring to fig. 5, the frangible window 20c extends in a second direction that intersects the first direction.

The patch structure 20 extends along the first direction, that is, the extending direction of the patch structure 20 is perpendicular to the extending direction of the weak window 20c, which is favorable to improving the size of a gap formed by separating the weak window 20c between two side edges of the second region 20a after stretching, thereby increasing the ultimate tensile deformation of the patch structure 20 and reducing the probability of fracture of the patch structure 20.

The ultimate tensile deformation of the patch structure 20 refers to the maximum dimension of the patch structure 20 that can be stretch deformed in the direction of the tensile force without breaking.

It will be appreciated that in some embodiments, the length direction of the patch structure 20 is the first direction.

The length direction of the patch structure 20, i.e. the direction of the dimension having the largest value among the three-dimensional outline dimensions of the patch structure 20. Since the patch structure 20 has the largest dimension in the length direction, the patch structure 20 has the largest deformation amount in the length direction.

The specific number of the weak windows 20c in each second region 20a is not limited.

In some embodiments, referring to fig. 5, 7, 9 and 11, only one weak window 20c is provided in each second region 20a, so that the weak window 20c can be formed at one time, thereby simplifying the production process and improving the production efficiency.

In other embodiments, referring to fig. 6, 8, 10 and 12, at least two of the weak windows 20c in each of the second regions 20a are provided, and the at least two weak windows 20c are spaced apart along the second direction. Each of the weak windows 20c is capable of creating a void under a tensile force to serve the purpose of deforming the patch structure 20 in a first direction; meanwhile, in the case where the stretching force is large, the weak windows 20c are torn at both ends in the second direction, and at least part of the weak windows 20c are communicated with each other, so that it is advantageous to further increase the ultimate tensile deformation of the patch structure 20.

It will be appreciated that in the case of a relatively high tensile force, there is a stress concentration in the frangible window 20c and further tearing may occur causing the frangible window 20c to continue to elongate in its direction of extension.

In some embodiments, referring to fig. 13 and 14, the spacing between at least one end of the frangible window 20c in the second direction and the edge of the patch structure 20 in the second direction is no more than 5mm (millimeters), i.e., l.ltoreq.5 mm.

In this way, the overall structural strength of the first region 20b between the edge of the patch structure 20 along the second direction and the weak window 20c is reduced, and the extending direction of the weak window 20c that is torn is guided, so that the weak window 20c can be torn preferentially along the second direction, and the probability that the weak window 20c tears along other directions to affect the functioning of the patch structure 20 is reduced.

The specific value of the spacing between the edge of the patch structure 20 in the second direction and the weakening window 20c is not limited, e.g. 1mm, 2mm, 3mm, 4mm, 5mm etc.

In some embodiments, referring to fig. 5, 6, 13 and 14, the patch structure 20 further forms a crack-stop region 20d, and the crack-stop region 20d is disposed on one side of the second region 20a in the second direction to limit tearing of the first region 20b adjacent to the second region 20 a.

The crack-arrest region 20d can reduce the probability of stress concentration at one end of the weak window 20c provided with the crack-arrest region 20d or improve the structural strength of the end, so that the tendency of the crack-arrest region 20d to continuously tear to the first region 20b at the end is reduced, the probability of damage to the patch structure 20 caused by the tearing of the first region 20b is reduced, and the probability of complete fracture and separation of the patch structure 20 caused by the continuous extension of the crack-arrest region 20d is reduced.

It will be appreciated that the crack arrest region 20d may be in direct communication with the frangible window 20 c; or alternatively, the two may be spaced apart from each other and then communicate with the crack stopper region 20d after the weak window 20c is torn.

The specific structural form of the crack stopper region 20d is not limited.

In some embodiments, referring to fig. 12, the crack-stop region 20d is a score or a crack, the crack-stop region 20d is arc-shaped and has a concave side facing the second region 20a, and in a state that the weak region is subjected to a tensile force along the first direction, the force can be uniformly distributed on an edge of the crack-stop region 20d away from the weak region, so that the probability that the weak region continues to tear and extend due to stress concentration is reduced.

The manufacturing process of the crack stop region 20d may be the same as or different from the manufacturing process of the weak window 20 c.

The arc angle of the crack stopper region 20d is not limited, and may be 90 °, 120 °, 180 °, 360 °, or the like. It will be appreciated that in embodiments where the radius of the crack stop region 20d is 360 °, the crack stop region 20d does not extend through the patch structure 20.

In other embodiments, referring to fig. 14, the crack-stopper region 20d is a circular hole, the circular hole penetrates through the patch structure 20, and in a state that the patch structure 20 receives a tensile force, the force can be uniformly distributed on the edge of the hole wall of the crack-stopper circular hole, so that the probability that the crack-stopper region 20d continues to tear and extend due to stress concentration is reduced.

The manufacturing process of the circular hole is not limited, and for example, a circular and hollow cutter is used to penetrate the patch structure 20 in the thickness direction of the patch structure 20, and then the cutter is pulled out, thereby forming a circular hole on the patch structure 20. The hollow cutters are capable of directly carrying away material removed from the patch structure 20, avoiding the need to additionally remove the removed material from the patch structure 20, which is advantageous in reducing manufacturing process steps.

In some embodiments, referring to fig. 13 and 14, the radius of the crack-stopper region 20d is no more than 5mm, i.e., R is less than or equal to 5mm, and the crack-stopper region 20d is sized appropriately, which reduces the chance of the crack-stopper region 20d being oversized and resulting in a reduced overall structural strength of the patch structure 20, and reduces the chance of the crack-stopper region 20d tearing after stretching of the patch structure 20 and resulting in breakage of the patch structure 20.

The specific value of the radius of the circular hole is not limited, for example, 2mm, 3mm, 4mm, 5mm, etc.

The specific arrangement of the second regions 20a is not limited.

In some embodiments, referring to fig. 7 and 8, the second regions 20a are plural, the plural second regions 20a are divided into at least two groups, and the second regions 20a in each group are arranged at intervals along the first direction, and the groups are arranged along the second direction. In this way, the arrangement manner of the plurality of second areas 20a is better adapted to the different arrangement manners of the battery cells 10, so that the patch structure 20 can still meet the heating requirement of the battery cells 10 and the deformability requirement of the patch structure 20 after the battery cells 10 expand under the condition that the different arrangement manners of the battery cells 10 are met.

It can be understood that, referring to fig. 7 and 8, the dimensions of the second regions 20a in each group along the extending direction are the same, and the two ends of the second regions 20a in each group are flush along the first direction, so as to simplify the manufacturing process of the second regions 20a in the same group and improve the production efficiency.

In some embodiments, referring to fig. 7 and 8, each second region 20a in at least two adjacent sets is aligned with each other. That is, the arrangement direction of the second regions 20a of each group is the same, and the pitch between the second regions 20a within each group is the same. Alignment of the second regions 20a with each other means that the second regions 20a in two adjacent groups are on the same line. In this way, the manufacturing process of each group of the second regions 20a is facilitated to be simplified, and at the same time, it is facilitated to be adapted to the arrangement manner in which the plurality of battery cells 10 are stacked.

In some embodiments, referring to fig. 9 and 10, the second regions 20a are plural, the plural second regions 20a are divided into at least two groups, the second regions 20a in each group are arranged at intervals along the first direction, the second regions are arranged along the second direction between the groups, in two adjacent groups, a portion of the second regions 20a in one group extends between two adjacent second regions 20a in the other group, and the second regions 20a in the two groups are alternately arranged along the first direction. In this way, the size of the second region 20a in each group is prolonged under the condition that the size of the patch structure 20 along the extending direction of the second region 20a is fixed, so that the ultimate tensile deformation of the patch structure 20 along the extending direction is further increased while the arrangement mode of the battery cells 10 is adapted, and the fracture probability of the patch structure 20 is reduced.

It will be appreciated that the patch structure 20 has different portions therein to satisfy the different functions of the patch structure 20.

For example, referring to fig. 15, the patch structure 20 includes a substrate 21 and a functional element 22, the first region 20b and the second region 20a are located on the substrate 21, the functional element 22 is attached to the substrate 21, and the functional element 22 is used to heat the battery cell 10.

The function member 22 serves to generate heat to heat the battery cell 10. The functional element 22 is in a sheet-like structure to make the overall structure of the patch structure 20 more compact.

The functional element 22 is typically in the form of resistive heating, which converts electrical energy into thermal energy for the purpose of generating heat.

The source of electrical energy for the functional element 22 is not limited, for example, the functional element 22 is electrically connected with the battery cell 10 to directly obtain electrical energy from the battery cell 10.

The base material 21 has insulation properties.

In this way, through the cooperation of the substrate 21 and the functional piece 22, on the basis of satisfying and realizing the heating function to the battery cell 10, reduced the probability that the functional piece 22 takes place to stretch and lead to damaging along first direction, reduced the risk that takes place the short circuit between battery cell 10 and the functional piece 22.

In some implementations, referring to fig. 15, the number of the substrates 21 is two, two substrates 21 are stacked and the functional element 22 is sandwiched between the two substrates 21, and the functional element 22 is disposed in the first region 20b. In this way, the probability of short circuit caused by direct contact and electrical conduction between the functional element 22 and other structures in the battery can be further reduced, and meanwhile, the functional element 22 corresponds to the first area 20b, so that the deformation of the functional element 22 along the first direction is reduced, and the probability of damage to the functional element 22 due to stretching deformation is reduced.

In the projection along the thickness direction of the patch structure 20, the projection of the functional element 22 is located within the projection range of the first region 20b, so as to reduce the risk of the functional element 22 being exposed after the patch structure 20 is subjected to a stretching force.

The thickness direction of the patch structure 20 refers to a direction perpendicular to the extending direction of the patch structure 20.

The specific type of material of the substrate 21 is not limited, and may be, for example, at least one of a polyimide film, an aluminum nitride ceramic film, a zinc oxide ceramic film, and a boron nitride ceramic film.

The specific type of the functional member 22 is not limited, and for example, a metal foil or the like is used to attach and fix the base material 21 and the functional member 22 by a high-temperature heat-sealing process. The specific type of metal of the metal foil is not limited, for example copper.

The specific manner in which the patch structure 20 is implemented for attachment is not limited.

Referring to fig. 15 and 16, the patch structure 20 further includes an adhesive member 23, and the patch structure 20 includes the adhesive member 23, wherein the adhesive member 23 is attached to a surface of one of the base materials 21 facing away from the functional member 22.

The adhesive member 23 has an adhesive property so that the patch structure 20 can be adhered to the battery cell 10.

The adhesive member 23 has adhesiveness on both sides in the thickness direction of the patch structure 20 so that adhesion between the adhesive member 23 and the base material 21 and adhesion between the adhesive member 23 and the battery cell 10 are enabled.

The specific type of the adhesive member 23 is not limited, and for example, a nonwoven fabric is used as the base material 21, and an acrylic adhesive is coated on both sides, and a foam base material 21 is coated on both sides with an acrylic adhesive.

In some embodiments, the adhesive attachment 23 has an adhesive viscosity of 4N/cm ² (Newton per square centimetre cattle)Per square centimeter) to 10N/cm ² . The adhesion viscosity of the adhesive member 23 is within the interval, on one hand, enough adhesion force is provided between the adhesive member 23 and the base material 21 and between the adhesive member 23 and the battery cell 10, so that the probability of relative sliding between the adhesive member 23 and the base material 21 and between the adhesive member 23 and the battery cell 10 is reduced, and the patch structure 20 is kept in a fixed state; on the other hand, the patch structure 20 is easily removed from the intended installation location for subsequent repair and recycling.

The specific value of the adhesion viscosity of the adhesive member 23 is not limited, for example, 4N/cm ² 、5N/cm ² 、6N/cm ² 、8N/cm ² 、10N/cm ² Etc.

In some embodiments, referring to fig. 15 and 16, the adhesive member 23 is formed with a third region 23a and a fourth region 23b, the tensile strength of the third region 23a in the first direction being greater than the tensile strength of the fourth region 23b in the first direction. In this way, under the action of the tensile force of the battery cell 10 along the first direction, the fourth region 23b can have a larger deformation amount along the first direction than the third region 23a, so that the inhibition effect of deformation of the patch structure 20 along the first direction due to the self-adhesion of the adhesive piece 23 is reduced, and the deformation amount of the patch structure 20 along the first direction is improved.

The specific arrangement positions of the third region 23a and the fourth region 23b are not limited.

For example, referring to fig. 15 and 16, the third region 23a is attached to the first region 20b, and the fourth region 23b is attached to the second region 20 a. Thus, on one hand, the synchronous stretching deformation of the second region 20a and the fourth region 23b along the first direction is facilitated, the probability of warping, torsion and other problems of the patch structure 20 in the stretching process due to the constraint of the third region 23a on the second region 20a and the constraint of the first region 20b on the fourth region 23b is reduced, and the probability of damage to the functional piece 22 due to the warping and torsion is reduced; on the other hand, the second region 20a and the fourth region 23b are advantageously positioned identically, sized identically, and shaped identically on the projection along the thickness direction of the patch structure 20, and further advantageously manufactured simultaneously at one time to form the second region 20a and the fourth region 23b, thereby simplifying the manufacturing process and improving the production efficiency.

The specific form of the fourth region 23b is not limited.

For example, referring to fig. 16, the fourth region 23b is a score or crack, and the fourth region 23b extends in a second direction that intersects the first direction. After the expansion of the battery cell 10, the both side edges of the fourth region 23b are sealed off from contact and form a gap under the action of the tensile force, so that the adhesive member 23 is integrally deformed in the direction of the tensile force. In this way, the suppressing effect of the tensile deformation of the patch structure 20 due to the tackiness of the adhesive member 23 itself is reduced.

In this way, it is convenient to reduce the generation of waste materials during the process of preparing the fourth region 23b, improve the manufacturing efficiency, and reduce the manufacturing cost; at the same time, it is convenient for the fourth region 23b to have the maximum deformation amount in the first direction.

In some embodiments, referring to fig. 14 and 15, the patch structure 20 includes a protective member 24, where the protective member 24 covers a surface of the other layer of the substrate 21 facing away from the functional member 22, and the protective member 24 has a tensile strength in the first direction that is less than the tensile strength of the first region 20b in the first direction.

The protective piece 24 plays a certain protective role on the base material 21, avoids the base material 21 from being directly exposed and being easy to damage, reduces the probability of tearing the base material 21 under smaller stretching acting force, and is beneficial to improving the overall structural strength of the patch structure 20.

It will be appreciated that the guard 24 is capable of elastic deformation in the direction of the stretching force under the influence of the stretching force, i.e. the guard 24 will shrink to a dimension before it is not subjected to the stretching force after the stretching force is released.

It will be appreciated that the guard 24 is a membranous structure.

The specific material of the guard 24 is not limited, and may be PET (polyethylene glycol terephthalate, polyethylene terephthalate) or the like.

In some embodiments, the adhesion viscosity between the guard 24 and the substrate 21 is no more than 2N/cm ² So that separation between the guard 24 and the substrate 21 is less likely to occur.

The specific value of the adhesion viscosity between the shield 24 and the substrate 21 is not limited, for example, 1N/cm ² 、2N/cm ² Etc.

Referring to fig. 4 to 16, a battery according to an embodiment of the present utility model is described as follows:

the battery comprises a patch structure 20 and at least two battery cells 10, wherein the at least two battery cells 10 are distributed along a first direction and are close to each other, the patch structure 20 is attached to the at least two battery cells 10, the patch structure 20 comprises a base material 21, a functional piece 22, an adhesion piece 23 and a protection piece 24, a first area 20b and a second area 20a are positioned on the base material 21, the tensile strength of the first area 20b in the first direction is larger than that of the second area 20a in the first direction, part of the first area 20b is positioned on one side of the second area 20a in the first direction, part of the first area 20b is positioned on the other side of the second area 20a in the first direction, two parts of the first area 20b positioned on two sides of the second area 20a are of an integral structure, the second area 20a is at least two, all the second areas 20a are distributed at intervals along the first direction, at least part of the second area 20a is positioned between the adjacent two battery cells 10, a window 20c is formed in the second area, the window 20c is a notch or crack, the window 20c extends along the second direction, part of the window 20c extends along the second direction, the second direction is positioned at least exceeds the radius of the crack stop area 20d, the crack stop area 20 mm is formed at the second end of the crack stop area 20d, and the crack stop area is not along the second direction, the crack stop area is positioned along the radius of the second crack stop area 5mm, and the crack stop edge 5mm is formed at least is not along the crack stop edge 5mm; the functional pieces 22 are used for heating the battery cell 10, the number of the base materials 21 is two, the two layers of base materials 21 are overlapped, the functional pieces 22 are clamped between the two layers of base materials 21, the functional pieces 22 are arranged in the first area 20b, the adhesive piece 23 is attached to the surface of one side of the base material 21, which is far away from the functional pieces 22, and the adhesive viscosity of the adhesive piece 23 is 4N/cm ² To 10N/cm ² The adhesive member 23 is formed with a third region 23a and a fourth region 23b, the tensile strength of the third region 23a in the first direction is greater than the tensile strength of the fourth region 23b in the first direction, the third region 23a is aligned with the firstThe region 20b is attached, the fourth region 23b is attached to the second region 20a, the fourth region 23b is a score or crack, the fourth region 23b extends along the second direction, the protective member 24 covers one side surface of the other layer of the base material 21 facing away from the functional member 22, the tensile strength of the protective member 24 in the first direction is smaller than that of the first region 20b in the first direction, and the adhesion viscosity between the protective member 24 and the base material 21 is not more than 2N/cm ² 。

Referring to fig. 5 to 16, a first region 20b and a second region 20a are formed in the patch structure 20, and the tensile strength of the first region 20b in the first direction is greater than the tensile strength of the second region 20a in the first direction. Thus, on the basis that the patch structure 20 can be deformed in a stretching manner in the first direction under the action of the stretching force, the two parts with different tensile strengths are arranged, so that the functional parts on the patch structure 20 can be arranged in the first area 20b, and the probability of functional damage caused by stretching of the patch structure 20 is reduced.

In some embodiments, a portion of the first region 20b is located on one side of the second region 20a in the first direction, a portion of the first region 20b is located on the other side of the second region 20a in the first direction, and two portions of the first region 20b located on both sides of the second region 20a are integrally formed. In this way, all the first areas 20b on the patch structure 20 can be connected to form an integrated structure, which is beneficial to realizing that the functional parts on the patch structure 20 are continuously arranged along the first direction, thereby being beneficial to simplifying the structure of the patch structure 20 and improving the contact area between the patch structure 20 and the plurality of battery cells 10 along the first direction.

In some embodiments, a weakened window 20c is formed in the second region 20a, the weakened window 20c being a score or crack. In this way, the weak window 20c is formed without removing a portion between both side edges of the weak window 20 c. In this way, the material on the patch structure 20 does not need to be removed additionally in the preparation process, so that the production process is simplified, the waste is treated without additional steps, the production efficiency is improved, and the production cost is reduced.

The embodiment of the utility model also provides an electric device, which comprises the battery in any one of the previous embodiments, wherein the battery is used as a power supply of the electric device. In this way, the battery cell 10 is heated and expanded by the patch structure 20 in a low-temperature environment, so that the probability of damage to a heat transfer path between the patch structure 20 and the battery cell 10 due to relative movement between the patch structure 20 and the battery cell 10 is reduced, and the heating efficiency is improved. The probability of normal power supply of a battery in the power utilization device is improved.

The various embodiments/implementations provided herein may be combined with one another without conflict.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery, comprising:

the patch structure is attached to at least two battery monomers; the patch structure is formed with a first region and a second region, wherein the tensile strength of the first region in the first direction is greater than that of the second region in the first direction.

2. The battery according to claim 1, wherein a part of the first region is located on one side of the second region in the first direction, a part of the first region is located on the other side of the second region in the first direction, and two parts of the first region located on both sides of the second region are integrally formed.

3. The battery of claim 2, wherein the second regions are provided in at least two, all of the second regions being spaced apart along the first direction.

4. A battery according to claim 3, wherein at least part of the second region is located between two adjacent cells.

5. The battery of claim 1, wherein a window of weakness is formed in the second region, the window of weakness being a score or a crack.

6. The battery of claim 5, wherein the frangible window extends in a second direction, the second direction intersecting the first direction.

7. The battery of claim 6, wherein at least two of said weakened windows in each of said second areas are provided, at least two of said weakened windows being spaced apart along said second direction.

8. The battery of claim 6, wherein a spacing between at least one end of the frangible window in the second direction and an edge of the patch structure in the second direction is no more than 5mm.

9. The battery of any one of claims 6-8, wherein the patch structure further forms a crack stop region disposed on a side of the second region in the second direction to limit tearing of the first region proximate the second region.

10. The battery of claim 9, wherein the crack stop region is a score or a slit, the crack stop region being rounded and concave side facing the second region;

or, the crack stop area is a round hole.

11. The cell of claim 10, wherein the radius of the crack stop region is no more than 5mm.

12. The battery according to claim 1, wherein the second regions are plural, the plural second regions are divided into at least two groups, the second regions in each group are arranged at intervals in the first direction, the second regions in each group are arranged in the second direction, a part of the second regions in one group extends between two adjacent second regions in the other group in adjacent two groups, and the second regions in the two groups are alternately arranged in the first direction.

13. The battery of claim 1, wherein the patch structure comprises a substrate and a functional element, the first region and the second region being located on the substrate, the functional element being attached to the substrate, the functional element being for heating the battery cell.

14. The battery of claim 13, wherein the number of substrates is two, two layers of the substrates are stacked and the functional element is sandwiched between two layers of the substrates, the functional element being disposed in the first region.

15. The battery of claim 14, wherein the patch structure includes an adhesive member attached to a side surface of one of the layers of the substrate facing away from the functional element.

16. The battery of claim 15, wherein the adhesive has an adhesive viscosity of 4N/cm ² To 10N/cm ² 。

17. The battery of claim 15, wherein the adhesive is formed with a third region and a fourth region, the third region having a tensile strength in the first direction that is greater than a tensile strength of the fourth region in the first direction.

18. The battery of claim 17, wherein the third region is attached to the first region and the fourth region is attached to the second region;

and/or the fourth region is a score or a crack, the fourth region extends along a second direction, and the second direction intersects the first direction.

19. The battery of claim 15, wherein the patch structure includes a guard member overlying a surface of another layer of the substrate facing away from the functional member, the guard member having a tensile strength in the first direction that is less than a tensile strength of the first region in the first direction.

20. The battery of claim 19, wherein an adhesion viscosity between the guard and the substrate is no more than 2N/cm ² 。

21. The utility model provides a paster structure for laminate in at least two along the battery monomer that the first direction was arranged and be close to each other, its characterized in that, be formed with first region and second region in the paster structure, first region is in first direction's tensile strength is greater than the second region is in first direction's tensile strength.

22. The patch construct of claim 21, wherein a portion of the first region is located on one side of the second region in the first direction, a portion of the first region is located on the other side of the second region in the first direction, and two portions of the first region located on opposite sides of the second region are of unitary construction.

23. A patch structure as claimed in claim 21 or claim 22, wherein a window of weakness is formed in the second region, the window of weakness being a score or a slit.

24. An electric device comprising the battery of any one of claims 1 to 20 as a power source for the electric device.