CN218414686U

CN218414686U - Battery cell, battery and power consumption device

Info

Publication number: CN218414686U
Application number: CN202223008594.XU
Authority: CN
Inventors: 牛从酥; 吴宁生; 裴振兴; 李晓伟
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-01-31
Anticipated expiration: 2032-11-11

Abstract

The application relates to the technical field of batteries, and provides a single battery, a battery and an electric device, wherein the single battery comprises a shell, at least two naked battery cores, a first connecting piece and a second connecting piece, wherein the naked battery cores are accommodated in the shell; the first connecting piece is connected to the positive electrode lug of the naked electric core, and the second connecting piece is connected to the negative electrode lug of the naked electric core; wherein, at least two naked electric cores are through first connecting piece and second connecting piece parallel connection, and in each naked electric core of parallel connection, at least two naked electric cores set gradually along the first direction, the thickness direction of the naked electric core of first direction perpendicular to. The application provides a battery monomer can reduce the stack of the bulging force that each naked electric core produced, reduces the holistic inflation volume of battery monomer to effectively improve and pile up the problem that sets up and lead to the bulging force great and then cause the circulation to jump water because of naked electric core.

Description

Battery cell, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a battery monomer, a battery and an electric device.

Background

The battery is widely applied to various fields and can be used for providing electric energy for electric devices, such as electric vehicles, electronic equipment and other electric devices; the battery can also be applied to energy storage systems of hydraulic power, firepower, wind power, solar power stations and the like to store electric energy.

The single battery is the minimum unit of the battery, and in some cases, the single battery is prone to cycle water jumping (i.e., capacity water jumping occurring in the circulation process of the single battery, i.e., significant capacity fading) during the use process, which affects the performance of the single battery.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a single battery, a battery and an electric device, which can solve the technical problem that the performance of the single battery is affected by the occurrence of circulating water jumping easily.

In a first aspect, an embodiment of the present application provides a battery cell, where the battery cell includes:

a housing;

at least two bare cells housed within the housing;

the first connecting piece is connected to the positive electrode lug of the naked electric core; and

the second connecting piece is connected to the negative pole lug of the bare cell;

wherein, at least two naked electric core passes through first connecting piece with second connecting piece parallel connection, and parallel connection each in the naked electric core, at least two naked electric core sets gradually along the first direction, first direction perpendicular to the thickness direction of naked electric core.

The technical scheme in the embodiment of the application at least has the following technical effects or advantages:

according to the battery monomer provided by the embodiment of the application, at least two bare battery cores are connected in parallel through the first connecting piece and the second connecting piece, and compared with series connection, the battery monomer is not easy to lose efficacy due to overhigh voltage, and the stability of the battery monomer is favorably improved; because in each naked electric core of parallel connection, at least two naked electric cores set gradually along the first direction, and the thickness direction of the naked electric core of first direction perpendicular to, can regard as two at least naked electric cores tiling to set up, compare in the thickness direction along naked electric core and pile up the setting, each naked electric core relative dispersion is rather than concentrating on one, can reduce the stack of the bulging force that each naked electric core produced, reduce the holistic swell volume of battery monomer, thereby effectively improve and pile up the problem that the setting leads to the bulging force great and then cause the circulation to jump water because of naked electric core.

In some embodiments, the number of the bare cells is two, the positive electrode tabs of the bare cells are arranged oppositely, and the negative electrode tabs of the bare cells are arranged oppositely; first connecting piece with the second connecting piece all is located two between the naked electric core.

Through adopting above-mentioned technical scheme, arbitrary naked electric core does not all have the condition of piling up, does not have the expansive force of a plurality of naked electric cores and follows the superimposed condition of thickness direction of naked electric core, is difficult for influencing the pole piece that electrolyte soaks naked electric core. Because the anodal utmost point ear of two naked electric cores sets up relatively, the negative pole utmost point ear of two naked electric cores sets up relatively, and first connecting piece and second connecting piece all are located between two naked electric cores, do benefit to and shorten the distance between the anodal utmost point ear of two naked electric cores, the distance between the negative pole utmost point ear of two naked electric cores, and then can reduce the size or the volume of first connecting piece and second connecting piece, thereby reduce the occupation to casing inner space, do benefit to and improve the free energy density of battery.

In some embodiments, the first connecting piece comprises a first connecting part and a second connecting part which are oppositely arranged, and a first transition part which is connected with the first connecting part and the second connecting part in a bent manner; the first connecting part is electrically connected with a positive electrode lug of one bare cell, and the second connecting part is electrically connected with a positive electrode lug of the other bare cell; and/or

The second connecting piece comprises a third connecting part and a fourth connecting part which are oppositely arranged, and a second transition part which is connected with the third connecting part and the fourth connecting part in a bending way; the third connecting portion with one of them the negative pole utmost point ear electric connection of naked electric core, the fourth connecting portion with another the negative pole utmost point ear electric connection of naked electric core.

Through adopting above-mentioned technical scheme, first connecting piece approximately is the U-shaped promptly, and first connecting portion and second connecting portion homoenergetic take place certain deformation relatively first transition portion, more do benefit to with the anodal utmost point ear electric connection of two naked electric cores. The second connecting piece approximately is the U-shaped promptly, and certain deformation takes place for second transition portion for third connecting portion and fourth connecting portion homoenergetic relatively, more do benefit to the negative pole utmost point ear electric connection with two naked electric cores.

In some embodiments, the first transition is disposed outside of a gap formed between two of the bare cells; and/or, the second transition portion is arranged outside a gap formed between the two bare cells.

Through adopting above-mentioned technical scheme, be convenient for first transition portion extend to the outside again in the outside of naked electric core and other part electric connection, need not to set up in addition conductor structure and connect and extend to the outside again after first transition portion, and the second transition portion of being convenient for also need not to set up in addition conductor structure and connect and extend to the outside again after second transition portion in the outside of naked electric core and other part electric connection, does benefit to and simplifies the assembly process.

In some embodiments, the battery cell further comprises a first insulator disposed between the two bare cells; wherein at least a portion of the first insulating member is arranged between the first connecting portion and the second connecting portion; and/or at least part of the first insulating member is arranged between the third connecting part and the fourth connecting part.

Through adopting above-mentioned technical scheme, first insulating part can reduce the possibility that takes place mutual interference and short circuit between two naked electric cores, improves the security performance, and does benefit to and shortens the distance between two naked electric cores as far as possible to improve the free energy density of battery. Because at least part of the first insulating part is arranged between the first connecting part and the second connecting part and/or at least part of the first insulating part is arranged between the third connecting part and the fourth connecting part, the first insulating part can play an insulating and blocking role and is beneficial to improving the structure compactness.

In some embodiments, the number of bare cells is two; wherein one the positive pole utmost point ear and the negative pole utmost point ear of naked electric core all are dorsad another naked electric core.

Through adopting above-mentioned technical scheme, arbitrary naked electric core does not all have the condition of piling up, does not have the bulging force of a plurality of naked electric cores and follows the superimposed condition of thickness direction of naked electric core, is difficult for influencing the pole piece that electrolyte infiltrated naked electric core. Because the positive pole utmost point ear and the negative pole utmost point ear of arbitrary naked electric core all are in the back of another naked electric core, two naked electric cores can roughly the symmetry set up, and the structure is more regular, the arrangement of other parts of being convenient for.

In some embodiments, in the first direction, the positive electrode tabs of the two bare cells are arranged oppositely, and the negative electrode tabs of the two bare cells are arranged oppositely; along the perpendicular to the second direction of first direction, first connecting piece is located two the one end of naked electric core, the second connecting piece is located two the other end of naked electric core.

Through adopting above-mentioned technical scheme, can further improve the symmetry of two naked electric cores, the anodal utmost point ear electric connection of the first connecting piece of being convenient for and two naked electric cores to and the negative pole utmost point ear electric connection of the second connecting piece of being convenient for and two naked electric cores.

In some embodiments, the number of bare cells is two; one of the naked electric core is a first naked electric core, and the other naked electric core is a second naked electric core; the positive pole utmost point ear and the negative pole utmost point ear of first naked electric core all move towards the naked electric core of second, the positive pole utmost point ear and the negative pole utmost point ear of the naked electric core of second all are carried on the back first naked electric core.

Through adopting above-mentioned technical scheme, be convenient for first connecting piece and the anodal utmost point ear electric connection of two naked electric cores to and the second connecting piece of being convenient for and the negative pole utmost point ear electric connection of two naked electric cores, difficult emergence mutual interference between first connecting piece and the second connecting piece.

In some embodiments, the battery cell further includes at least one first insulating member, and the first insulating member is disposed between two adjacent bare cells; and/or the presence of a gas in the gas,

the battery cell further comprises at least one second insulating piece, at least part of the second insulating piece is arranged between the first connecting piece and the bare cell, and/or at least part of the second insulating piece is arranged between the second connecting piece and the bare cell; and/or the presence of a gas in the gas,

the battery cell further comprises at least one third insulating piece, and the third insulating piece is arranged between the naked battery cell and the inner wall of the shell.

By adopting the technical scheme, the first insulating part can reduce the risks of mutual interference and short circuit between two adjacent naked battery cells; the second insulating part can reduce the risk of mutual interference and short circuit between the first connecting part and the naked electric core, and/or reduce the risk of mutual interference and short circuit between the second connecting part and the naked electric core; the third insulating part can reduce the risk that mutual interference and short circuit take place between naked electric core and the casing.

In some embodiments, the length of the bare cell is greater than or equal to the width of the bare cell; the first direction is parallel to the width direction of naked electric core.

Through adopting above-mentioned technical scheme, two at least naked electric cores set gradually along the width direction of naked electric core promptly for the free length of battery need not to set up the overlength, does benefit to suitable reduction in production manufacturing cost, improves the free stability of battery.

In some embodiments, the housing includes a first opening and a second opening disposed opposite each other, and the battery cell further includes:

the first end cover is arranged on the first opening in a covering mode;

a first electrode terminal disposed on the first end cap;

the second end cover is covered on the second opening; and

a second electrode terminal disposed on the second end cap;

the first connecting piece is electrically connected with the first electrode terminal, and the second connecting piece is electrically connected with the second electrode terminal.

By adopting the technical scheme, the electrodes are respectively led out from the two opposite ends or two opposite sides of the battery cell, so that the arrangement of the first connecting piece and the second connecting piece is facilitated, and the possibility of mutual interference between the first connecting piece and the second connecting piece can be reduced.

In some embodiments, the first connecting piece and the second connecting piece are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the bare cell; the first opening and the second opening are oppositely arranged along the second direction.

By adopting the technical scheme, the distance between the first connecting piece and the first electrode terminal is convenient to shorten, the distance between the second connecting piece and the second electrode terminal is convenient to shorten, the compactness between each part can be improved, and the improvement of the energy density of the battery monomer is facilitated.

In a second aspect, an embodiment of the present application provides a battery, which includes a plurality of battery cells as described in any of the above embodiments.

In a third aspect, an embodiment of the present application provides an electric device, including the battery of the foregoing embodiment, where the battery is used to provide electric energy.

It is understood that, the beneficial effects of the second aspect and the third aspect can be referred to the related description of the first aspect, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or related technologies will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an exploded view of a battery cell in some cases;

FIG. 2 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 3 is an exploded view of a battery according to some embodiments of the present disclosure;

fig. 4 is a schematic structural diagram of a battery cell provided in some embodiments of the present application;

FIG. 5 is an exploded view of the battery cell shown in FIG. 4;

fig. 6 is a schematic structural diagram of a bare cell according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a bare cell according to another embodiment of the present application;

fig. 8 is a schematic structural view of the battery cell shown in fig. 4 after the housing is removed;

FIG. 9 is a schematic structural diagram of a first connector according to some embodiments of the present application;

FIG. 10 is a schematic structural view of a second connector provided in some embodiments of the present application;

fig. 11 is a schematic structural diagram of a battery cell according to another embodiment of the present application;

fig. 12 is an exploded view of the battery cell shown in fig. 11;

fig. 13 is a schematic structural view of the battery cell shown in fig. 11 after the housing is removed;

fig. 14 is a schematic layout diagram of a bare cell of a battery cell according to still other embodiments of the present application;

fig. 15 is a schematic layout diagram of bare cells of a battery cell according to still other embodiments of the present disclosure;

fig. 16 is a schematic diagram of an arrangement of a plurality of battery cells according to some embodiments of the present disclosure.

Wherein, in the figures, the various reference numbers:

01. an electrical core assembly;

10. a battery cell; 11. a housing; 12. a naked battery cell; 121. a positive plate; 122. a negative plate; 123. a diaphragm; 13. a first connecting member; 1201. a positive electrode tab; 14. a second connecting member; 1202. a negative electrode tab; 131. a first connection portion; 132. a second connecting portion; 133. a first transition portion; 141. a third connecting part; 142. a fourth connecting portion; 143. a second transition portion; 15. a first insulating member; 16. a second insulating member; 17. a third insulating member; 1101. a first opening; 1102. a second opening; 181. a first end cap; 191. a first electrode terminal; 182. a second end cap; 192. a second electrode terminal;

100. a battery; 20. a box body; 21. a first portion; 22. a second portion;

1000. a vehicle; 200. a controller; 300. a motor;

A. a first direction; B. a second direction.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting 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 "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the terms "length", "width", "thickness", "inner", "outer", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

The terms "first", "second", etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. For example, the first connecting element and the second connecting element are only used for distinguishing different connecting elements, and the sequence thereof is not limited, and the first connecting element may be named as the second connecting element, and the second connecting element may be named as the first connecting element, without departing from the scope of the various described embodiments. And the terms "first", "second", etc. do not limit the indicated features to be necessarily different.

In the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected," "connecting," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. "plurality" means at least two, i.e., two or more; "multiple" means at least two, that is, two or more than two.

In the application, "and/or" is only one kind of association relation describing the association object, and means that there may be three kinds of relations; for example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It is noted that, in the present application, the words "in some embodiments," "exemplary," "such as," and "like" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "in some embodiments," "exemplary," "e.g.," is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the terms "in some embodiments," "exemplary," "e.g.," and the like, are intended to present relevant concepts in a concrete fashion, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present application. The appearances of the above 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

The battery is widely applied to various fields, can be used for providing electric energy for electric devices, for example, can provide electric energy for electric devices in the field of electric vehicles such as electric bicycles, electric motorcycles and electric automobiles, and can also provide electric energy for electric devices in multiple fields such as military equipment and aerospace; of course, the battery can also be applied to energy storage systems such as hydraulic, thermal, wind and solar power stations. The battery cell is the minimum unit of the battery, and with the improvement of the endurance requirement of the electric device and the improvement of the electric energy storage capacity requirement of the energy storage system, the requirement of the battery cell on the capacity is higher and higher.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an exploded structure of a battery cell in some cases. In order to increase the capacity of the battery cell, a plurality of cell assemblies 01 are generally disposed in the housing of the battery cell, and the cell assemblies 01 are sequentially stacked in the thickness direction thereof. In the process of charging and discharging the single battery, the electric core assembly 01 can generate anode rebound, and generate expansive force along the thickness direction of the electric core assembly 01, and the expansive force is particularly concentrated on the middle position of the electric core assembly 01. And each electric core subassembly 01 piles up the setting along self thickness direction, lead to the expansive force stack of each electric core subassembly 01, the holistic inflation volume that each electric core subassembly 01 formed is great, easily extrude electrolyte or lead to the reduction of pole piece porosity from electric core subassembly 01's pole piece within a definite time, the entering of electrolyte has been hindered, influence the infiltration of electrolyte to the pole piece, lithium phenomenon takes place to separate out easily, cause the free circulation of battery to jump water (the capacity that takes place among the free circulation of battery promptly jumps water, capacity jump water is obvious capacity decay promptly), thereby influence the free security performance of battery, performance such as life.

Based on this, for improving the technical problem that the battery monomer easily takes place the circulation and jump the water, improve the free performance of battery, the inventor is through the research, a battery monomer has been designed, through set up a plurality of naked electric cores that connect in parallel in the free casing of battery, and two at least naked electric cores set gradually along the first direction, the thickness direction of the naked electric core of first direction perpendicular to, two at least naked electric cores set up along the first direction tiling promptly, make each naked electric core disperse relatively and not pile up in one, do benefit to the expansive force dispersion that each naked electric core produced, can reduce the holistic expansive force of battery monomer and inflation volume, thereby effectively improve because of the expansive force great electrolyte that leads to soakage the difficulty to naked electric core, and then cause the problem of circulation jump the water, can improve the free performance of battery.

The battery cell disclosed in the embodiment of the application can be applied to an electric device using a battery as a power supply, and can also be applied to various energy storage systems using a battery as an energy storage element.

By way of example, the powered device may be, but is not limited to, a vehicle, a cell phone, a tablet, a portable device, a laptop, an electric toy, an electric tool, a boat, a spacecraft, and the like. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The electric toy may be a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, etc., but is not limited thereto. The electric tool may be a metal cutting electric tool, a grinding electric tool, a mounting electric tool, a railway electric tool, etc., and may be, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, an electric planer, etc., but is not limited thereto. The spacecraft may be, but is not limited to, an airplane, a rocket, a space shuttle, a spacecraft, and the like. The embodiment of the present application does not specifically limit the above power utilization device.

For convenience of description, the following embodiments are described by taking an electric device of one embodiment of the present application as an example of a vehicle.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be used to supply power to the vehicle 1000. The battery 100 may be disposed at various portions of the vehicle 1000, such as at the bottom, head, or tail of the vehicle 1000.

Alternatively, battery 100 may be used as an operating power source for vehicle 1000 for the circuitry of vehicle 1000, such as for operational power requirements during start-up, navigation, and operation of vehicle 1000. Of course, the battery 100 may also be used as a driving power source for the vehicle 1000, instead of or in part replacing fuel or natural gas to provide driving power for the vehicle 1000.

Optionally, the vehicle 1000 may further include a controller 200 and a motor 300, and the controller 200 may be used to control the battery 100 to supply power to the motor 300.

In order to meet different power use requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series, in parallel, or in series-parallel, and the series-parallel refers to a mixture of series connection and parallel connection. The battery may be a battery pack or a battery module. Alternatively, a plurality of battery cells may be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a battery. That is, a plurality of battery cells may directly constitute a battery, or a battery module may be first constituted and then a battery may be constituted.

Referring to fig. 3, fig. 2 is a schematic diagram illustrating an exploded structure of a battery 100 according to some embodiments of the present disclosure. The battery 100 includes a battery cell 10 and a case 20, and the battery cell 10 is accommodated in the case 20. The case 20 is used to provide a receiving space for the battery cell 10, and the case 20 may have various structures.

In some embodiments, referring to fig. 3, the case 20 may include a first portion 21 and a second portion 22, and the first portion 21 and the second portion 22 are fastened to each other to define a receiving space for receiving the battery cell 10. The shape and configuration of the first and

second portions

21 and 22 may be set according to the shape of the combination of the battery cells 10.

Alternatively, referring to fig. 3, the first portion 21 and the second portion 22 may be both hollow structures with one open side, and the open side of the first portion 21 covers the open side of the second portion 22 to jointly define the accommodating space.

Of course, in other embodiments, the second portion 22 may be a hollow structure with one end open, and the first portion 21 may be a plate-shaped structure, and the first portion 21 covers the open side of the second portion 22 to define a containing space together.

It is understood that the box 20 formed by the first portion 21 and the second portion 22 may have various shapes, such as, but not limited to, a cylinder, a rectangular parallelepiped, etc.

In the case 20, the number of the battery cells 10 may be plural, and a plurality of battery cells 10 may be connected in series, in parallel, or in series-parallel. Optionally, a plurality of battery cells 10 may be directly connected in series, in parallel, or in series-parallel, and then the whole formed by the plurality of battery cells 10 is accommodated in the case 20; of course, a plurality of battery cells 10 may be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a whole and accommodated in the case 20.

It is understood that battery 100 may include other configurations in addition to those described above. For example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 10.

The battery cell 10 refers to the smallest unit constituting the battery 100. The battery cell 10 may be various types of battery cells, for example, the battery cell 10 may be a lithium ion battery cell (a lithium ion secondary battery or a lithium ion primary battery), a lithium sulfur battery cell, a sodium ion battery cell, or a magnesium ion battery cell, but is not limited thereto. The battery cell 10 may have a rectangular parallelepiped shape, a flat shape, or other regular or irregular shapes.

Next, a description will be given of the battery cell 10 provided in the embodiment of the present application.

Referring to fig. 4 and 5, fig. 4 illustrates a schematic structural diagram of a battery cell 10 according to some embodiments of the present disclosure, and fig. 5 illustrates an exploded structural diagram of the battery cell 10 illustrated in fig. 4. The single battery 10 includes a housing 11, a bare cell 12, a first connecting member 13, and a second connecting member 14; the number of the naked electric cores 12 is generally at least two, and each naked electric core 12 is accommodated in the shell 11; the first connecting piece 13 is connected to the positive electrode tab 1201 of the bare cell 12, and the second connecting piece 14 is connected to the negative electrode tab 1202 of the bare cell 12. Wherein, two at least naked electric core 12 are through first connecting piece 13 and the 14 parallel connection of second connecting piece, and in each naked electric core 12 of parallel connection, two at least naked electric core 12 set gradually along first direction A, the thickness direction c of the naked electric core 12 of first direction A perpendicular to.

It can be understood that casing 11 is the structure that can provide the space for the holding of naked electric core 12 and electrolyte, can be multiple shape, for example cuboid shape, hexagonal prism shape etc. but not limited to this, and the holistic shape that specifically can form according to the combination of each naked electric core 12 sets up. The material of the housing 11 may be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment. The electrolyte filled in the casing 11 soaks each bare cell 12.

The bare cell 12, also referred to as an electrode assembly or a core assembly, is a component of the battery cell 10 in which electrochemical reactions occur. Referring to fig. 6 and 7, fig. 6 shows a schematic structural diagram of a bare cell 12 provided in some embodiments of the present application, and fig. 7 shows a schematic structural diagram of a bare cell 12 provided in other embodiments of the present application. The bare cell 12 may include a positive electrode tab 121, a negative electrode tab 122, and a separator 123 disposed between the positive electrode tab 121 and the negative electrode tab 122. The positive electrode sheet 121, the negative electrode sheet 122 and the diaphragm 123 may be wound to form the bare cell 12 in a winding structure, for example, as shown in fig. 6; the positive electrode tab 121, the negative electrode tab 122, and the separator 123 may also be stacked to form the bare cell 12 in a stacked structure, for example, as shown in fig. 7. The battery cell 10 operates by mainly relying on metal ions to move between the positive electrode tab 121 and the negative electrode tab 122. The positive electrode sheet 121 includes a positive electrode current collector and a positive electrode active material disposed on the positive electrode current collector, and the positive electrode active material may be coated on a surface of the positive electrode current collector. The portion of the positive electrode collector not provided with the positive electrode active material protrudes from the portion provided with the positive electrode active material, and the portions of the positive electrode collectors of the positive electrode sheets 121 not provided with the positive electrode active material are stacked to form a positive electrode tab 1201. The negative electrode tab 122 includes a negative electrode collector and a negative electrode active material disposed on the negative electrode collector, and the negative electrode active material may be coated on a surface of the negative electrode collector. The portion of the negative electrode current collector not provided with the negative electrode active material protrudes from the portion provided with the negative electrode active material, and the portions of the negative electrode current collectors of the negative electrode tabs 122 not provided with the negative electrode active material are stacked to form a negative electrode tab 1202. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like; the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the isolation film may be PP (polypropylene), PE (polyethylene), etc., but is not limited thereto. During the charge and discharge of the battery cell 10, the positive electrode active material and the negative electrode active material are able to react with the electrolyte, and metal ions move between the positive electrode tab 121 and the negative electrode tab 122.

The first connecting member 13 and the second connecting member 14 are both conductive structural members, and may be made of various conductor materials, the material of the first connecting member 13 may be the same as or different from that of the positive electrode tab 1201, and the material of the second connecting member 14 may be the same as or different from that of the negative electrode tab 1202. The first connecting piece 13 and the second connecting piece 14 are both positioned in the shell 11, and the structures of the first connecting piece 13 and the second connecting piece 14 can be the same or different. The first and

second connection members

13 and 14 may be various structures having regular or irregular shapes, such as a bent structure, a sheet structure, a plate structure, a rod structure, etc., but are not limited thereto.

It should be understood that when the quantity of naked electric core 12 is two, then two naked electric cores 12 are parallelly connected through first connecting piece 13 and second connecting piece 14, and two naked electric cores 12 set gradually along first direction A. When the quantity of naked electric core 12 is a plurality of three and three more, can be that each naked electric core 12 all is parallelly connected through first connecting piece 13 and second connecting piece 14, also can be wherein at least two naked electric cores 12 are parallelly connected through first connecting piece 13 and second connecting piece 14, and other naked electric cores 12 are not parallelly connected; in each naked electric core 12 of parallelly connected, can be that each naked electric core 12 all sets gradually along first direction A, also can be wherein two at least naked electric cores 12 set gradually along first direction A, and remaining naked electric core 12 does not set gradually along first direction A.

When the bare cell 12 is in a winding structure, the thickness direction c of the bare cell 12 is substantially the stacking direction of the portion where the stacking thickness is the largest, which is formed by stacking the positive electrode sheet 121, the negative electrode sheet 122, and the separator 123, for example, as shown in fig. 6. When the bare cell 12 has a laminated structure, the thickness direction c of the bare cell 12 is substantially the stacking direction of the positive electrode tab 121, the negative electrode tab 122, and the separator 123, for example, as shown in fig. 7.

By above can know, the battery cell 10 that this application embodiment provided, because a plurality of naked electric core 12 hold in casing 11, do benefit to and improve battery cell 10's capacity and energy density, and two at least naked electric cores 12 are parallelly connected in parallel through first connecting piece 13 and second connecting piece 14, compare in establishing ties, be difficult for leading to the battery cell to lose efficacy because of the voltage is too high, do benefit to the stability and the security performance that improve battery cell 10. Simultaneously, because in each naked electric core 12 of parallelly connected, at least two naked electric cores 12 set gradually along first direction A, and the thickness direction c of the naked electric core 12 of first direction A perpendicular to, can regard as the setting of two at least naked electric cores 12 tiling, compare in the thickness direction c along naked electric core 12 and pile up the setting, each naked electric core 12 relative dispersion rather than concentrating on one, can reduce the stack of the expansibility that each naked electric core 12 produced on the thickness direction c of naked electric core 12, reduce the holistic swelling capacity of battery monomer 10, be difficult for influencing the pole piece of electrolyte infiltration naked electric core 12, thereby effectively improve and lead to the problem that the expansibility is great and then cause the circulation to jump because of naked electric core 12 piles up the setting, can improve battery monomer 10's performance.

In some embodiments, referring to fig. 5 and 8, fig. 8 is a schematic structural diagram of the battery cell 10 shown in fig. 4 after the housing 11 is removed. The number of the naked electric cores 12 is two, the positive pole lugs 1201 of the two naked electric cores 12 are arranged oppositely, and the negative pole lugs 1202 of the two naked electric cores 12 are arranged oppositely; first connecting piece 13 and second connecting piece 14 all are located between two naked electric cores 12.

So set up, two naked electric cores 12 set gradually along first direction A promptly, and arbitrary naked electric core 12 all does not exist the condition of piling up, also two naked electric cores 12 tiling settings, does not have the bulging force of a plurality of naked electric cores 12 and follows the superimposed condition of the thickness direction c of naked electric core 12, is difficult for influencing the pole piece that naked electric core 12 was infiltrated to electrolyte. Because the positive pole utmost point ear 1201 of two naked electric cores 12 sets up relatively, the negative pole utmost point ear 1202 of two naked electric cores 12 sets up relatively, first connecting piece 13 and second connecting piece 14 all are located between two naked electric cores 12, consequently, the positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of any one naked electric core 12 in two naked electric cores 12 all towards another naked electric core 12, do benefit to and shorten the distance between the positive pole utmost point ear 1201 of two naked electric cores 12, distance between the negative pole utmost point ear 1202 of two naked electric cores 12, and then can reduce the size or the volume of first connecting piece 13 and second connecting piece 14, thereby reduce the occupation to casing 11 inner space, do benefit to improving battery monomer 10's energy density, the size or the reduction of volume of first connecting piece 13 and second connecting piece 14 simultaneously, also do benefit to reducing the barrier effect to electric current, do benefit to improving battery monomer 10's security performance. And, positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of any one naked electric core 12 all towards another naked electric core 12, and two naked electric cores 12 can roughly the symmetry set up, and the structure is more regular, the arrangement of the other parts of the battery monomer 10 of being convenient for, for example the first connecting piece 13 and the symmetrical setting of second connecting piece 14 of being convenient for, the structure of first connecting piece 13 and second connecting piece 14 can be the same, do benefit to the manufacturing.

In addition, compare in a plurality of naked electric core 12 that set up three and more than three, the quantity of naked electric core 12 is two, more does benefit to the parallelly connected between the naked electric core 12, and the length of battery monomer 10 also need not to set up the overlength, does benefit to the production manufacturing cost who reduces battery monomer 10, improves battery monomer 10's stability.

Optionally, in some embodiments, please refer to fig. 5 and fig. 8, the length directions a of the two bare cells 12 are parallel. The length direction a of two naked electric cores 12 parallels indicates, and the length direction a of two naked electric cores 12 is roughly parallel, and not the absolute parallel of injecing should allow to have certain deviation (for example the contained angle between the length direction a of two naked electric cores 12 can be 0 to 10 °) between the length direction a of two naked electric cores 12.

It can be understood that naked electric core 12 can roughly be cuboid shape or flat shape, two liang of mutually perpendicular of length direction an of naked electric core 12, the width direction b of naked electric core 12, the thickness direction c of naked electric core 12. Of course, naked electric core 12 also can be roughly in the shape of a cylinder or an elliptic cylinder, and the length direction a of naked electric core 12 is the axis direction of naked electric core 12 this moment.

It should be noted that, in some other embodiments, the positive electrode tabs 1201 of the two bare cells 12 may also be staggered rather than arranged oppositely; the negative electrode tabs 1202 of the two bare cells 12 may also be staggered.

Optionally, referring to fig. 5, 8 and 9, fig. 9 is a schematic structural diagram of the first connecting member 13 according to some embodiments of the present application. The first connecting member 13 includes a first connecting portion 131 and a second connecting portion 132 disposed opposite to each other, and a first transition portion 133 connected to the first connecting portion 131 and the second connecting portion 132 in a bent manner. The first connecting portion 131 is electrically connected to the positive electrode tab 1201 of one of the bare cells 12, and the second connecting portion 132 is electrically connected to the positive electrode tab 1201 of the other bare cell 12.

It is understood that the first connecting portion 131, the second connecting portion 132 and the first transition portion 133 are all part of the first connecting member 13, and the first connecting portion 131, the second connecting portion 132 and the first transition portion 133 may have various shapes, such as, but not limited to, a sheet shape, a plate shape, a rod shape, etc. The first connection portion 131, the second connection portion 132, and the first transition portion 133 may be integrally formed, or may be connected by separate molding.

So set up, first connecting piece 13 is roughly the U-shaped promptly, first connecting portion 131 and second connecting portion 132 all can take place certain deformation relatively first transition portion 133, distance between first connecting portion 131 and the second connecting portion 132 can be adjusted promptly, in order to have certain nimble volume, more do benefit to first connecting portion 131 and second connecting portion 132 respectively with two naked electric core 12's anodal utmost point ear 1201 electric connection, and first connecting portion 131 and second connecting portion 132 all have certain elasticity relatively first transition portion 133, do benefit to the stability that improves first connecting portion 131 and second connecting portion 132 and two naked electric core 12's anodal utmost point ear 1201 electric connection.

Alternatively, the first connection portion 131 and the first transition portion 133 may be substantially vertically disposed, i.e., the included angle therebetween is substantially 90 ° (some deviation should be allowed, such as between 80 ° and 100 °); the second connecting portion 132 and the first transition portion 133 may be disposed substantially perpendicular, i.e., at an angle of substantially 90 ° therebetween.

Of course, in other embodiments, the included angle between the first connection portion 131 and the first transition portion 133 may be greater than or less than 90 °, and the included angle between the second connection portion 132 and the first transition portion 133 may be greater than or less than 90 °.

Optionally, referring to fig. 5, 8 and 10, fig. 10 shows a schematic structural diagram of the second connecting member 14 according to some embodiments of the present application. The second connecting member 14 includes a third connecting portion 141 and a fourth connecting portion 142 disposed opposite to each other, and a second transition portion 143 connected to the third connecting portion 141 and the fourth connecting portion 142 in a bent manner. The third connection portion 141 is electrically connected to the negative electrode tab 1202 of one of the bare cells 12, and the fourth connection portion 142 is electrically connected to the negative electrode tab 1202 of the other bare cell 12.

It is understood that the third connecting portion 141, the fourth connecting portion 142 and the second transition portion 143 are all part of the second connecting member 14, and the third connecting portion 141, the fourth connecting portion 142 and the second transition portion 143 may have various shapes, such as, but not limited to, a sheet shape, a plate shape, a rod shape, etc. The third connecting portion 141, the fourth connecting portion 142, and the second transition portion 143 may be integrally formed, or may be connected by being separately formed.

So set up, the second connecting piece 14 is roughly the U-shaped promptly, third connecting portion 141 and fourth connecting portion 142 all can take place certain deformation relative to second transition portion 143, the distance between third connecting portion 141 and the fourth connecting portion 142 can be adjusted promptly, in order to have certain flexible volume, more do benefit to third connecting portion 141 and fourth connecting portion 142 respectively with two naked electric core 12's negative pole utmost point ear 1202 electric connection, and third connecting portion 141 and fourth connecting portion 142 all have certain elasticity relative to second transition portion 143, do benefit to and improve third connecting portion 141 and fourth connecting portion 142 and two naked electric core 12's positive pole utmost point ear 1201 electric connection's stability.

Alternatively, the third connecting portion 141 and the second transition portion 143 may be disposed substantially perpendicularly, i.e., the included angle therebetween is substantially 90 °; the fourth connecting portion 142 and the second transition portion 143 may be substantially perpendicular, i.e. the included angle therebetween is substantially 90 °.

Of course, in other embodiments, the included angle between the third connecting portion 141 and the second transition portion 143 may be greater than or less than 90 °, and the included angle between the fourth connecting portion 142 and the second transition portion 143 may be greater than or less than 90 °.

Optionally, referring to fig. 8, the first transition portion 133 is disposed outside a gap formed between two bare cells 12; the second transition portion 143 is arranged outside the gap formed between the two bare cells 12.

With such an arrangement, the first transition part 133 is electrically connected with other components (for example, the first electrode terminal 191 of the battery cell 10) at the outer side of the bare cell 12, and it is not necessary to additionally provide a conductor structure to connect the first transition part 133 and then extend to the outside, which is beneficial to simplifying the assembly process; the second transition portion 143 is electrically connected to other components (e.g., the second electrode terminal 192 of the battery cell 10) at the outer side of the bare cell 12, and it is not necessary to additionally provide a conductor structure to connect the second transition portion 143 and then extend to the outside, which is beneficial to simplifying the assembly process.

Of course, in some other embodiments, one of the first transition portion 133 and the second transition portion 143 may be disposed outside the gap formed between the two bare cells 12, and the other may not be disposed outside the gap formed between the two bare cells 12 (i.e., located in the gap formed between the two bare cells 12).

Optionally, referring to fig. 5 and 8, the battery cell 10 further includes a first insulating member 15, and the first insulating member 15 is disposed between the two bare cells 12. At least a portion of the first insulating member 15 is disposed between the first connection portion 131 and the second connection portion 132, and at least a portion of the first insulating member 15 is disposed between the third connection portion 141 and the fourth connection portion 142.

It is understood that the first insulating member 15 is a structural member having an insulating function, and may be a structural member made of various insulating materials (such as, but not limited to, plastics, etc.), such as, but not limited to, a sheet structure, a plate structure, etc. The number of the first insulating members 15 may be one or more, and when the number of the first insulating members 15 is plural, the respective first insulating members 15 may be connected or disconnected.

So set up, first insulating part 15 can reduce the possibility of taking place mutual interference and short circuit between two naked electric cores 12, improves the security performance, and because of the existence of first insulating part 15, does benefit to and shortens as far as possible the distance between two naked electric cores 12 to improve battery cell 10's energy density. Since at least a portion of the first insulating member 15 is disposed between the first connection portion 131 and the second connection portion 132, and at least a portion of the first insulating member 15 is disposed between the third connection portion 141 and the fourth connection portion 142, the first insulating member 15 can perform an insulating and blocking function, and is also beneficial to improving the structural compactness, thereby improving the energy density of the battery cell 10.

Of course, in other embodiments, the first insulating member 15 may not be arranged between at least one of the first connection portion 131 and the second connection portion 132, and the third connection portion 141 and the fourth connection portion 142.

It should be noted that the structures of the first connecting member 13 and the second connecting member 14 are not limited to this. In other embodiments, at least one of the first connecting member 13 and the second connecting member 14 may have a plate-like structure or a rod-like structure.

In the above-mentioned embodiment, two naked electric cores 12 have been introduced, and the positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of any one naked electric core 12 all face to the condition of another naked electric core 12, but naked electric core 12's the mode of arranging is not limited to this.

In other embodiments, please refer to fig. 11 to 13, fig. 11 illustrates a front view structural schematic diagram of a battery cell 10 according to another embodiment of the present application, fig. 12 illustrates an exploded structural schematic diagram of the battery cell 10 illustrated in fig. 11, and fig. 13 illustrates a structural schematic diagram of the battery cell 10 illustrated in fig. 11 after the housing 11 is removed. The quantity of naked electric core 12 is two, and positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of one of them naked electric core 12 all are back to another naked electric core 12.

So set up, two naked electric cores 12 set gradually along first direction A promptly, and arbitrary naked electric core 12 does not all have the condition of piling up, also two naked electric cores 12 tiling settings, does not have the expansive force of a plurality of naked electric cores 12 and follows the superimposed condition of thickness direction c of naked electric core 12, is difficult for influencing the pole piece that naked electric core 12 was infiltrated to electrolyte. Because positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of any one naked electric core 12 all set up to another naked electric core 12 dorsad, two naked electric cores 12 can roughly the symmetry, and the structure is more regular, the arrangement of other parts of being convenient for, for example, be convenient for first connecting piece 13 and second connecting piece 14 symmetry setting, first connecting piece 13 and second connecting piece 14's structure can be the same, do benefit to the manufacturing.

Optionally, in some embodiments, please refer to fig. 12 and 13, in the first direction a, the positive electrode tabs 1201 of the two bare cells 12 are disposed opposite to each other, and the negative electrode tabs 1202 of the two bare cells 12 are disposed opposite to each other. Along the second direction B of perpendicular to first direction A, first connecting piece 13 is located the one end of two naked electric cores 12, and second connecting piece 14 is located the other end of two naked electric cores 12.

It can be understood that the positive electrode tabs 1201 of the two bare cells 12 are arranged oppositely, that is, the positive electrode tabs 1201 of the two bare cells 12 are arranged away from each other in the first direction a, and the positions in the second direction B are approximately consistent; similarly, the negative electrode tabs 1202 of two bare cells 12 are oppositely arranged, and the negative electrode tabs 1202 of two bare cells 12 are far away from each other in the first direction a, and the positions in the second direction B are approximately consistent. Wherein, second direction B is perpendicular to first direction a and the thickness direction c of naked electric core 12. First connecting piece 13 is located two naked electric cores 12 same one end on second direction B promptly, and second connecting piece 14 is located two naked electric cores 12 same other ends on second direction B promptly.

So set up, can further improve the symmetry of two naked electric cores 12, the anodal utmost point ear 1201 electric connection of the first connecting piece 13 of being convenient for and two naked electric cores 12 to and the negative pole utmost point ear 1202 electric connection of the second connecting piece 14 of being convenient for and two naked electric cores 12.

Of course, in some other embodiments, the positive electrode tabs 1201 of the two bare cells 12 may also be staggered from each other in the second direction B, rather than being disposed oppositely; the negative electrode tabs 1202 of the two bare cells 12 may also be staggered from each other in the second direction B.

Alternatively, referring to fig. 12 and 13, the first connecting member 13 may include a first connecting portion 131 and a second connecting portion 132 that are oppositely disposed, and a first transition portion 133 that is connected to the first connecting portion 131 and the second connecting portion 132 in a bending manner. First connecting portion 131, second connecting portion 132 and first transition portion 133 all lie in the holistic outside or the periphery that two naked electric cores 12 formed promptly, first connecting portion 131 and the anodal utmost point ear 1201 electric connection of one of them naked electric core 12, second connecting portion 132 and the anodal utmost point ear 1201 electric connection of another naked electric core 12, first transition portion 133 lies in the same one end of two naked electric cores 12.

The second connecting member 14 includes a third connecting portion 141 and a fourth connecting portion 142 disposed opposite to each other, and a second transition portion 143 connected to the third connecting portion 141 and the fourth connecting portion 142 in a bent manner. Third connecting portion 141, fourth connecting portion 142 and second transition portion 143 all are located the holistic outside or the periphery that two naked electric cores 12 formed promptly, and third connecting portion 141 and one of them naked electric core 12's negative pole utmost point ear 1202 electric connection, fourth connecting portion 142 and another naked electric core 12's negative pole utmost point ear 1202 electric connection, and second transition portion 143 is located two naked electric cores 12 with the other end.

In other embodiments, referring to fig. 14, fig. 14 shows a schematic layout of two bare cells 12 of a battery cell 10 provided in other embodiments of the present application. Naked electric core 12's quantity is two, defines one of them naked electric core 12 and is first naked electric core, and another naked electric core 12 is the naked electric core of second. The positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of first naked electric core all face towards the naked electric core of second, and the positive pole utmost point ear 1201 and the negative pole utmost point ear 1202 of the naked electric core 12 of second all are first naked electric core dorsad.

So set up, compare in the same condition of end of anodal utmost point ear 1201 and the negative pole utmost point ear 1202 orientation of two naked electric cores 12, and the anodal utmost point ear 1201 of two naked electric cores 12 sets up in opposite directions, the negative pole utmost point ear 1202 of two naked electric cores 12 sets up in opposite directions, be convenient for first connecting piece 13 and the anodal utmost point ear 1201 electric connection of two naked electric cores 12, and be convenient for second connecting piece 14 and the negative pole utmost point ear 1202 electric connection of two naked electric cores 12, difficult mutual interference that takes place between first connecting piece 13 and the second connecting piece 14.

In order to improve the safety performance of the battery cell 10, in some embodiments, referring to fig. 5, 8, 12 and 13, the battery cell 10 further includes at least one first insulating member 15, and the first insulating member 15 is disposed between two adjacent bare cells 12. The battery cell 10 further includes at least one second insulating member 16, at least a portion of the first insulating member 15 is disposed between the first connecting member 13 and the bare cell 12, and/or at least a portion of the first insulating member 15 is disposed between the second connecting member 14 and the bare cell 12. The battery cell 10 further includes at least one third insulating member 17, and the third insulating member 17 is disposed between the bare cell 12 and the inner wall of the casing 11.

It is understood that the first insulating member 15, the second insulating member 16 and the third insulating member 17 are all structural members having an insulating function, and may be structural members made of various insulating materials (such as, but not limited to, plastics, etc.), such as, but not limited to, sheet structures, plate structures, etc. The shape and configuration of the first, second and

third insulators

15, 16 and 17 may be the same or different.

With such an arrangement, the first insulating member 15 can reduce the risk of mutual interference and short circuit between two adjacent bare cells 12; the second insulating part 16 can reduce the risk of mutual interference and short circuit between the first connecting part 13 and the positive plate or the negative plate of the bare cell 12, and reduce the risk of mutual interference and short circuit between the second connecting part 14 and the positive plate or the negative plate of the bare cell 12; the third insulating member 17 can reduce the risk of mutual interference and short circuit between the bare cell 12 and the casing 11.

Optionally, please refer to fig. 5 and 12, when the number of bare cell 12 is two, one side of any bare cell 12 facing away from another bare cell 12 is provided with a third insulating member 17, so as to improve the insulating effect between bare cell 12 and casing 11.

Of course, in other embodiments, one or more of the first insulator 15, the second insulator 16, and the third insulator 17 may not be provided. For example, when the housing 11 is an insulating housing or an insulating layer is provided on the inner surface of the housing 11, the third insulating member 17 may not be provided. For example, when an insulating layer is disposed on a local outer surface of the first connecting member 13, the second insulating member 16 may not be disposed between the first connecting member 13 and the bare cell 12; when the local outer surface of the second connecting member 14 is provided with the insulating layer, the second insulating member 16 may not be provided between the second connecting member 14 and the bare cell 12.

In some embodiments, referring to fig. 5, 12, and 14, the length of the bare cell 12 is greater than or equal to the width of the bare cell 12; first direction a is parallel to the width direction b of naked electric core 12.

Can understand, naked electric core 12 length is naked electric core 12 along length direction a's size, naked electric core 12 width is naked electric core 12 along width direction b's size, naked electric core 12 thickness is naked electric core 12 along thickness direction c's size promptly naked electric core 12. The thickness of naked electric core 12 is usually less than the length of naked electric core 12.

So set up, two at least naked electric core 12 set gradually along the width direction b of naked electric core 12 promptly, compare in the length direction a along naked electric core 12 set gradually, do benefit to the holistic length that reduces each naked electric core 12 and form for the length of battery monomer 10 need not to set up the overlength, does benefit to suitable reduction production manufacturing cost, improves the stability of battery monomer 10.

It should be noted that, in some other embodiments, please refer to fig. 15, where fig. 15 shows a schematic arrangement diagram of two bare cells 12 of the battery cell 10 provided in some other embodiments of the present application, and the first direction a may be parallel to the length direction a of the bare cells 12, that is, at least two bare cells 12 are sequentially arranged along the length direction a of the bare cells 12.

In some embodiments, referring to fig. 5, 8, 12 and 13, the housing 11 includes a first opening 1101 and a second opening 1102 disposed opposite to each other. The battery cell 10 further includes a first end cap 181, a first electrode terminal 191, a second end cap 182, and a second electrode terminal 192. The first cap 181 is disposed to cover the first opening 1101, and the first electrode terminal 191 is disposed on the first cap 181. The second end cap 182 is disposed over the second opening 1102, and the second electrode terminal 192 is disposed on the second end cap 182. The first connecting element 13 is electrically connected to the first electrode terminal 191, and the second connecting element 14 is electrically connected to the second electrode terminal 192.

It is understood that the housing 11 is a structure with two open ends and a hollow interior, so as to form a first opening 1101 and a second opening 1102 at two ends. The first end cap 181 is a member that can be fitted to the first opening 1101 of the housing 11 to seal the first opening 1101, and the second end cap 182 is a member that can be fitted to the second opening 1102 of the housing 11 to seal the second opening 1102. The first end cap 181 may have a shape that matches the shape of the outer edge of the first opening 1101, and the second end cap 182 may have a shape that matches the shape of the outer edge of the second opening 1102; for example, the housing 11 has a rectangular parallelepiped structure, the first opening 1101 and the second opening 1102 are both rectangular openings, and the first end cap 181 and the second end cap 182 are both substantially rectangular plate-shaped structures. The first end cap 181 and the second end cap 182 may be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc., but not limited thereto, the materials of the first end cap 181 and the second end cap 182 may be the same as or different from the material of the housing 11.

The first electrode terminal 191 and the second electrode terminal 192 are each a structure for drawing out an electrode of the battery cell 10, so that the battery cell 10 forms a current loop with an external component. The first and

second electrode terminals

191 and 192 may be structural members of various shapes capable of conducting electricity, such as a column structure (which may be a cylindrical structure or a prism structure), a plate structure, and the like, but are not limited thereto. The first electrode terminal 191 may serve as a positive electrode terminal, and the second electrode terminal 192 may serve as a negative electrode terminal.

With such an arrangement, since the first opening 1101 and the second opening 1102 are oppositely arranged, the first end cap 181 and the second end cap 182 are also oppositely arranged, which is beneficial to leading out electrodes from two opposite ends or two opposite sides of the single battery 10, compared with the case of only arranging one opening or arranging two adjacent openings, the arrangement of the first connecting piece 13 and the second connecting piece 14 is convenient, the possibility of mutual interference between the first connecting piece 13 and the second connecting piece 14 can be reduced, and the safety and the stability of the single battery 10 can be improved.

Optionally, in some embodiments, please refer to fig. 5, fig. 8, fig. 12, and fig. 13, the first connecting member 13 and the second connecting member 14 are disposed at an interval along a second direction B, and the second direction B is perpendicular to the first direction a and the thickness direction c of the bare cell 12. The first opening 1101 and the second opening 1102 are oppositely disposed along the second direction B.

With this arrangement, the arrangement direction of the first connecting member 13 and the second connecting member 14 is substantially the same as the arrangement direction of the first opening 1101 and the second opening 1102, so that the distance between the first connecting member 13 and the first electrode terminal 191 is shortened, and the distance between the second connecting member 14 and the second electrode terminal 192 is shortened, which can improve the compactness between the components, and further, is beneficial to improving the energy density of the single cell 10.

Alternatively, referring to fig. 5, 8, 12 and 13, the first transition portion 133 of the first connecting member 13 may be electrically connected to the first electrode terminal 191, and may be directly connected or indirectly connected through an intermediate conductive member. The second transition portion 143 of the second connecting member 14 may be electrically connected to the second electrode terminal 192, directly or indirectly through an intermediate conductive member.

Of course, in other embodiments, the first connecting member 13 and the second connecting member 14 may be spaced apart along the second direction B, and the first opening 1101 and the second opening 1102 are oppositely disposed along the first direction a.

It should be noted that in other embodiments, only one of the first opening 1101 and the second opening 1102 may be provided, and correspondingly, only one of the first end cap 181 and the second end cap 182 may be provided.

The embodiment of the present application further provides a battery, which includes a plurality of battery cells 10 according to any one of the above embodiments. The battery may be any one of the batteries described in the above embodiments, such as the battery 100 shown in fig. 3, and will not be described herein.

In some embodiments, the number of the battery cells 10 is multiple, and the multiple battery cells 10 are stacked in the thickness direction c of the battery cells 10, and fig. 16 is a schematic structural diagram exemplarily illustrating the stacking of the multiple battery cells 10.

It is understood that a plurality of battery cells 10 are stacked in the thickness direction c of the battery cell 10, that is, the battery cell 10 is laid flat (that is, the battery cell 10 is placed on another battery cell 10 or another object in the thickness direction c thereof, that is, the battery cell 10 is placed on another battery cell 10 or another object with the largest area facing downward), and are stacked one on another.

With such an arrangement, the requirement that the battery cell 10 is required to be laid down can be met, and the contact area between the battery cell 10 laid down and external objects (such as a cooling plate, a box body and the like) is large, which is beneficial to improving the heat dissipation effect. Under some circumstances, adopt the battery monomer that electric core subassembly stacked the setting, easy because of the expansibility is great leads to analysing lithium and causing the circulation to jump, especially when battery monomer lies and places, the expansibility of battery monomer's electric core subassembly along self thickness direction is roughly the same with the gravity direction, changes the battery monomer circulation and jumps. And the battery monomer 10 that this application embodiment provided, owing to reduced the holistic inflation volume of battery monomer 10, improved and piled up the problem that sets up and lead to the bulging force great and then cause the circulation to jump water because of naked electric core 12, can be adapted to the scheme that battery monomer 10 laid down and set up betterly.

The embodiment of the application also provides an electric device, which comprises the battery of any one of the embodiments, wherein the battery is used for providing electric energy. The electric device may be any one of the electric devices described in the above embodiments, such as the vehicle 1000 shown in fig. 2, and will not be described herein again.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A battery cell, comprising:

a housing;

at least two bare cells housed within the housing;

wherein, at least two naked electric core is through first connecting piece with second connecting piece parallel connection, and parallel connection each in the naked electric core, at least two naked electric core sets gradually along the first direction, first direction perpendicular to the thickness direction of naked electric core.

2. The battery cell according to claim 1, wherein the number of the bare cells is two, and positive electrode tabs of the two bare cells are arranged oppositely, and negative electrode tabs of the two bare cells are arranged oppositely; first connecting piece with the second connecting piece all is located two between the naked electric core.

3. The battery cell of claim 2,

the first connecting piece comprises a first connecting part and a second connecting part which are arranged oppositely, and a first transition part which is connected with the first connecting part and the second connecting part in a bending way; the first connecting part is electrically connected with a positive electrode lug of one bare cell, and the second connecting part is electrically connected with a positive electrode lug of the other bare cell; and/or the presence of a gas in the gas,

4. The battery cell of claim 3, wherein the first transition is disposed outside of a gap formed between two bare cells; and/or the presence of a gas in the atmosphere,

the second transition portion is arranged outside a gap formed between the two bare cells.

5. The battery cell of claim 4, further comprising a first insulator disposed between the two bare cells;

wherein at least a portion of the first insulator is disposed between the first connection portion and the second connection portion; and/or at least part of the first insulating member is arranged between the third connecting part and the fourth connecting part.

6. The battery cell of claim 1, wherein the bare cells are two in number, and wherein a positive tab and a negative tab of one of the bare cells are both facing away from the other bare cell.

7. The battery cell of claim 6, wherein in the first direction, positive tabs of the two bare cells are arranged opposite to each other, and negative tabs of the two bare cells are arranged opposite to each other; along the perpendicular to the second direction of first direction, first connecting piece is located two the one end of naked electric core, the second connecting piece is located two the other end of naked electric core.

8. The battery cell of claim 1, wherein the number of bare cells is two; one of the naked electric core is a first naked electric core, and the other naked electric core is a second naked electric core; the positive pole utmost point ear and the negative pole utmost point ear of first naked electric core all move towards the naked electric core of second, the positive pole utmost point ear and the negative pole utmost point ear of the naked electric core of second all are carried on the back first naked electric core.

9. The battery cell according to any one of claims 1 to 8, further comprising at least one first insulating member, wherein the first insulating member is disposed between two adjacent bare cells; and/or the presence of a gas in the atmosphere,

10. The battery cell of any of claims 1-8, wherein the length of the bare cell is greater than or equal to the width of the bare cell; the first direction is parallel to the width direction of the naked electric core.

11. The battery cell of any of claims 1-8, wherein the housing includes first and second oppositely disposed openings, the battery cell further comprising:

the first end cover is arranged on the first opening in a covering mode;

a first electrode terminal disposed on the first end cap;

the second end cover is covered on the second opening; and

a second electrode terminal disposed on the second end cap;

12. The battery cell of claim 11, wherein the first and second connectors are spaced apart along a second direction, the second direction being perpendicular to the first direction and the thickness direction of the bare cell; the first opening and the second opening are oppositely arranged along the second direction.

13. A battery comprising a plurality of cells according to any one of claims 1 to 12.

14. An electrical device comprising a battery as claimed in claim 13 for providing electrical energy.