CN216389611U - Battery monomer, battery module, battery package and electric device - Google Patents

Abstract

The application discloses battery monomer, battery module, battery package and electric installation. The battery cell includes: the device comprises a shell, a shell body and a shell body, wherein one side of the shell body is provided with a plane structure, the other side of the shell body is provided with an arc surface structure, and the plane structure and two ends of the arc surface structure are mutually connected to form a whole body with a hollow structure inside; at least one electric core assembly is arranged in the shell and has a gap with the shell. According to the single battery, one side of the shell is designed into the arc-shaped surface structure, the other side of the shell is designed into the plane structure, the internal volume is increased, a gap exists between the electric core component and the shell, and the increased gap can be used for injecting more electrolyte, so that the infiltration effect is improved, the electrolyte injection efficiency is improved, more lithium ions can be supplemented, and the long-term cycle life of the battery is prolonged; on the other hand, the increased clearance can increase the dead volume inside the shell, and the safety of the battery is improved.

Description

Battery monomer, battery module, battery package and electric device

Technical Field

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

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

In the prior art, on one hand, the assembly process of the battery is complex, and particularly, the battery monomer grouping difficulty is high, and the production efficiency is low; in addition, during the use process of charging and discharging, the battery core can bulge to affect the safety performance of the battery, and the safety performance needs to be improved. In addition, the electrolyte is continuously consumed along with the charge and discharge cycles of the battery, and the service life of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

In view of above-mentioned problem, the application provides a battery monomer, battery module, battery package and power consumption device, can realize the directional installation of battery monomer, reduces the degree of difficulty in groups, alleviates the battery life's of the battery safety problem and the electrolyte consumption influence that the inflation in the battery use leads to problem.

In a first aspect, the present application provides a battery cell, comprising: the device comprises a shell, a shell body and a shell body, wherein one side of the shell body is provided with a plane structure, the other side of the shell body is provided with an arc surface structure, and the plane structure and two ends of the arc surface structure are mutually connected to form a whole body with a hollow structure inside; at least one electric core assembly is arranged in the shell and has a gap with the shell.

According to the technical scheme of the embodiment of the application, one side of the shell of the battery is designed into the cambered surface structure, the other side of the shell of the battery is designed into the plane structure, and the shell formed by connecting the cambered surface structure and the plane structure is larger in internal volume compared with a traditional cylindrical shell, so that a gap exists between the electric core component and the shell, and the increased gap can be used for injecting more electrolyte, improving the infiltration effect, improving the liquid injection efficiency, supplementing more lithium ions and prolonging the long-term cycle life of the battery; on the other hand, the increased clearance can increase the dead volume inside the shell, and the safety of the battery is improved.

In some embodiments, the at least one core assembly is a cylindrical core, which is fitted with the arc-shaped structure. Through the free structure of adjustment battery, when improving battery performance, realize the directional installation of cylinder electricity core, reduce the degree of difficulty in groups.

In some embodiments, the gap between the at least one electric core assembly and the housing is filled with an electrolyte. The electrolyte can be used for replenishing lithium ions and prolonging the long-term cycle life of the battery.

In some embodiments, the battery cell further includes a positive electrode assembly and a negative electrode assembly respectively disposed at two ends of the case and adapted to the shape and size of the cross section of the case. Through the shape and the size design with positive pole subassembly and negative pole subassembly and the cross-section adaptation of casing, realize the directional installation of positive pole subassembly and negative pole subassembly, further promote the assembly efficiency of battery.

In some embodiments, the housing is an aluminum shell. The aluminum shell is a battery shell made of aluminum alloy materials and is mainly applied to lithium ion secondary batteries, and the lithium ion secondary batteries are packaged by the aluminum shell because the aluminum shell is lighter in weight and safer than a steel shell.

In some embodiments, the battery cell further comprises at least one explosion-proof structure disposed on the arc-shaped structure. Through the casing both sides with the battery design into different shapes, not only realized the directional installation of battery, also can ensure in addition that certain subassembly on the casing can realize fixed orientation, for example set up explosion-proof structure on the cambered surface structure of casing, and planar structure is used for contacting other subassembly or other battery monomer, use this kind of structure to make explosion-proof structure can keep away from other battery monomer or other subassemblies, make explosion-proof structure's blasting quicker, further promote the security performance of battery, also reduce the influence to other subassemblies.

In some embodiments, the battery cell further comprises at least one vent disposed on the positive electrode assembly and/or the negative electrode assembly. On the basis that the inner space of the shell is increased, exhaust holes can be added to the pole piece assemblies at the two ends of the shell, the exhaust effect of the shell can be effectively improved, and the safety performance of the battery is further improved.

In a second aspect, the present application provides a battery module, including at least two of the above-mentioned battery cells, further including at least one water-cooling plate, set up between the battery cells, every battery cell contacts at least one water-cooling plate through planar structure.

According to the technical scheme of the embodiment of the application, one side of the shell of the battery monomer is provided with the planar structure, the battery monomer is vertically attached to the water cooling plate through the planar structure, the water cooling plate can be made into a plane, a snake-shaped plate with a complex process is not required to be made, the process is simpler, the requirement on the size precision is reduced, the cost of the water cooling plate is reduced, and the cost of the battery module is further reduced; in addition, the difficulty of grouping the battery monomers is also reduced; simultaneously, can not lead to battery monomer can't closely laminate with the water-cooling board because of factors such as snakelike board position, circular arc size are bad when battery monomer is in groups, and sticky interface is more reliable, has promoted battery module's security performance.

In a third aspect, the present application provides an electric device, which includes the battery cell in the above embodiments, and the battery cell is used for providing electric energy. Because the performance of the battery monomer is improved, the stability of the electric device in the use process can also be improved.

In some embodiments, the powered device further comprises: at least two battery cells; the at least one water-cooling plate is arranged between the at least two battery monomers, and each battery monomer is in contact with the at least one water-cooling plate through a plane structure.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not to limit the application.

In the drawings, like parts are designated with like reference numerals, and the drawings are schematic and not necessarily drawn to scale.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one or several embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to such drawings without creative efforts.

Fig. 1 is a schematic diagram of an overall structure of a battery cell grouping in the prior art;

fig. 2 is a schematic cross-sectional view of a battery cell in the prior art;

fig. 3 is a schematic cross-sectional view of a battery cell according to some embodiments of the present disclosure;

fig. 4 is an exploded view of a battery cell according to some embodiments of the present disclosure;

fig. 5 is a schematic view of the overall structure of a battery cell according to some embodiments of the present application;

fig. 6 is a schematic view illustrating an overall structure of a battery module according to some embodiments of the present application;

FIG. 7 is a schematic diagram of the overall structure of a powered device according to some embodiments of the present application;

description of the main reference numerals:

a battery module 100; a battery cell 10; a water-cooling plate 20; a housing 11; an electric core assembly 12; a positive electrode assembly 13; a negative electrode assembly 14; an explosion-proof structure 15; a power consuming device 16; a planar structure 111; a cambered surface structure 112; a gap 113;

the battery module 100 ', the battery cells 10 ', and the water cooling plate 20 ' according to the related art.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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 the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power 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, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The inventor notices that the prior art cylindrical battery core usually adopts a cylindrical shell, and as shown in fig. 1, the battery cells 10 ' need to use the snake-shaped water cooling plates 20 ' when being grouped, and the battery cells 10 ' are stacked up and down. For the single battery 10', the space in the shell is small, the liquid injection time is long, usually 7 hours are needed, and the infiltration effect is poor; the small dead volume can also cause the blocking of a pole piece or a diaphragm, the internal exhaust is not smooth, and the chamber explosion is easily caused by thermal runaway; the battery monomer 10' has no fixed orientation and is randomly oriented; if certain features are required to have a fixed orientation, if an explosion-proof valve or score is required to face outward, circumferential rotation is required for adjustment; in addition, the precision required by the sandwich snake-shaped plate 20' is high, and the process is relatively complex.

Referring to fig. 2, since the cylindrical cell of the battery cell 10' uses a cylindrical casing that is also matched to the shape of the cylindrical cell, there is no extra space between the cylindrical cell and the cylindrical casing for injecting the electrolyte. In addition, both sides of the shell are cambered surfaces, and the shell can only be assembled by using a snakelike water cooling plate, and cannot be directionally assembled.

In order to solve the problem that the cylindrical battery cell cannot be directionally installed, the invention aims to provide a novel battery monomer structure and a battery grouping scheme; the battery pack is adjusted based on a traditional cylindrical shell, one side of the cylindrical shell is designed into a plane, on one hand, the directional installation of the battery monomers can be realized, and particularly, when the battery monomers are grouped, the side with the plane is used for contacting a water cooling plate; on the other hand, the space inside the shell is increased, and the increased space can be used for injecting more electrolyte, so that the infiltration effect is improved, and the liquid injection efficiency is improved; the electrolyte which is stored in a large amount can be used for supplementing lithium ions, so that the long-term cycle life of the battery is prolonged; the increased space can increase the dead volume in the shell, and the exhaust effect can be effectively improved by matching with punching of the pole piece assembly, so that the explosion-proof structure can be exploded at the first time; the interlayer water cooling plate between the single batteries can be made into a plane, the process is simpler, the characteristics of circular arc and the like are avoided, a snake-shaped plate is not required to be made, the required precision of the size is reduced, and the cost is reduced; when the battery monomers are grouped, the battery monomers are provided with phases, so that the characteristic orientation can be ensured to be fixed, for example, the explosion-proof structure is upward; battery monomer can not lead to battery monomer and the unable inseparable laminating of water-cooling board because of factors such as snakelike board position degree, circular arc size are bad when in groups, and sticky interface is more reliable, is favorable to promoting the effect of water-cooling board cooling, further promotes the security of battery.

The battery cell disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited thereto. The power supply system who possesses this power consumption device of constitution such as battery monomer, battery that this application is disclosed can be used, like this, is favorable to alleviating and automatically regulated electric core bulging force worsens, and supplementary electrolyte consumes, promotes the stability and the battery life of battery performance.

The embodiment of the application provides an electric device using a battery as a power supply, 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. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

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

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 battery cell 10 or the battery module 100 composed of the battery cells 10 is disposed inside the vehicle, and the battery cell 10 or the battery module 100 may be disposed at the bottom or the head or the tail of the vehicle. The battery cell 10 or the battery module 100 may be used for power supply of a vehicle, for example, the battery cell 10 or the battery module 100 may serve as an operation power source of the vehicle. The vehicle may further include a controller for controlling the battery cell 10 or the battery module 100 to supply power to the motor, for example, for starting, navigation, and operation power demand during driving of the vehicle.

In some embodiments of the present application, the battery cell 10 or the battery module 100 may be used as an operating power source of a vehicle, and may also be used as a driving power source of the vehicle, instead of or in part of fuel or natural gas, to provide driving power for the vehicle.

Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a battery cell 10 according to some embodiments of the present disclosure, in which a dotted line portion is a space occupied by a battery cell assembly 12 in a housing 11, and it can be seen that a gap 113 is added between the battery cell assembly 12 and the housing 11. Referring to the exploded view of the battery cell shown in fig. 4, the battery cell 10 includes a housing 11, a core assembly 12, a positive assembly 13, a negative assembly 14, an explosion-proof structure 15, and other functional components, wherein one side of the housing 11 has a planar structure 111, and the other side has an arc structure 112, and the housing 11 may be made of a material (such as an aluminum alloy) with certain hardness and strength, so that the housing 11 is not easily deformed when being extruded and collided, and the battery cell 10 may have higher structural strength, and the safety performance may be improved; the positive electrode assembly 13 and the negative electrode assembly 14 can be used for being electrically connected with the electric core assembly 12 for outputting or inputting electric energy of the battery cell 10; the explosion-proof structure 15 is used for relieving the pressure inside the shell 11, preventing the single battery 10 from exploding, and improving the safety performance of the single battery 10.

Specifically, fig. 5 is a schematic diagram illustrating an overall structure of the battery cell 10 according to some embodiments of the present disclosure. The shape of the housing 11 may be determined according to the specific shape and size of the electric core assembly 12. The material of the housing 11 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

Referring to fig. 6, fig. 6 is a structural diagram of a battery module 100 according to some embodiments of the present disclosure. In the battery module 100, the number of the battery cells 10 may be multiple, and the multiple battery cells 10 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the multiple battery cells 10. The plurality of single batteries 10 can be directly connected in series or in parallel or in series and parallel, and the planar structures 111 of the plurality of single batteries 10 are attached to the water cooling plate 20; of course, the battery cells 10 may also be formed by connecting a plurality of battery cells 10 in series, in parallel, or in series-parallel to form a battery module 100, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a battery pack. The battery module 100 may further include other structures, for example, the battery module 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 10.

Wherein each battery cell 10 may be a secondary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery.

According to some embodiments of the present application, the battery cell 10 provided with reference to fig. 4 includes: the structure comprises a shell 11, wherein one side of the shell 11 is provided with a plane structure 111, the other side of the shell 11 is provided with an arc-shaped structure 112, and the plane structure 111 and two ends of the arc-shaped structure 112 are connected with each other to form a whole with a hollow structure inside; at least one electric core assembly 12 is disposed in the housing 11, and a gap 113 is formed between the electric core assembly and the housing 11, as can be seen from fig. 3, by making one side of the housing 11 into a planar structure 111, the space of the housing 11 is increased compared with a conventional cylindrical housing, and the gap 113 is formed between two sides of the electric core assembly 12 shown in fig. 3 and the housing 11.

Through the technical scheme, on one hand, when the single batteries 10 are grouped, quick directional installation can be realized, only one side with the plane structure 111 is required to be attached to the water cooling plate 20, the position of the single batteries 10 does not need to be adjusted by rotating, and the process difficulty of grouping the single batteries 10 is reduced; in addition, the space increased by the design can be used for injecting more electrolyte, so that the infiltration effect is improved, the electrolyte injection efficiency is improved, more lithium ions can be supplemented, and the long-term cycle life of the single battery 10 is prolonged; on the other hand, the increased gap 113 can increase the dead volume inside the case 11, thereby facilitating the exhaust and pressure relief of the case 11 and improving the safety of the battery cell 10.

It should be noted that, if both sides of the housing 11 are designed to be planar structures, the battery cells 10 can be mounted in an oriented manner, and a square tube battery is formed. Although the grouping process of the square tube batteries is simple, the square tube batteries are closely arranged without gaps 113 during grouping. According to the method of the embodiment of the invention, the planar structure 111 and the arc-shaped structure 112 are combined to form the housing 11 of the battery cell 10, and compared with a square tube battery, the method has the following advantages: a gap 113 is formed between the battery cells 10 of the battery module 100, as shown in fig. 6, the gap 113 may be used to arrange other auxiliary components, such as a sampling assembly for collecting the battery cells 10; if the two sides of the shell 11 are designed to be in a plane structure, the battery is tightly attached to the battery, no space is arranged in the middle, only other spaces can be occupied for arranging auxiliary components, and the capacity of the battery is sacrificed. In short, the structure of the battery cell 10 of the present invention further optimizes the space after grouping, optimizes the layout space in the battery module 100 on the premise of not sacrificing the capacity of the battery cell 10, and reduces the volume of the battery module 100.

In some embodiments, referring to fig. 4, the core assembly 12 of the battery cell 10 is a cylindrical core, and the cylindrical core is fitted with the arc-shaped structure 112. Through the structure of adjustment battery monomer 10, when improving battery performance, realize the directional installation of cylinder electricity core, reduce the degree of difficulty of uniting.

In some embodiments, the gap 113 between the electric core assembly 12 and the housing 11 is filled with an electrolyte. The electrolyte can be used for replenishing lithium ions and prolonging the long-term cycle life of the battery. In addition, the gap 113 between the electric core assembly 12 and the shell 11 is beneficial to improving the injection efficiency of the electrolyte.

In some embodiments, referring to fig. 4, the battery cell 10 further includes a positive electrode assembly 13 and a negative electrode assembly 14 respectively disposed at two ends of the housing 11 and adapted to the shape and size of the cross-section of the housing 11. The positive electrode assembly 13 and the negative electrode assembly 14 each have a connection portion for connecting both electrodes of the electric module 12, and end caps for sealing both ends of the housing 11. By designing the shape and size of the positive electrode assembly 13 and the negative electrode assembly 14 to be matched with the cross section of the shell 11, the positive electrode assembly 13 and the negative electrode assembly 14 are installed in an oriented mode, and the assembly efficiency of the battery cell 10 is further improved.

In some embodiments, the housing 11 is an aluminum shell. The aluminum shell is a battery shell made of aluminum alloy materials and is mainly applied to lithium ion secondary batteries, and the lithium ion secondary batteries are packaged by the aluminum shell because the aluminum shell is heavier and safer than a steel shell. It should be noted that, the selection of the aluminum alloy material is only one of the alternative embodiments of the present invention, and the present invention is not limited to the material of the housing 11. Copper, iron, aluminum, stainless steel, plastic, etc. may also be used.

In some embodiments, the battery cell 10 further includes at least one explosion-proof structure 15 disposed on the arc-shaped structure 112, wherein the explosion-proof structure 15 includes, but is not limited to, a score, an explosion-proof valve. Since a large amount of chemical substances are filled in the battery cell 10, a large amount of mixed gas and liquid may be generated during the charge and discharge of the battery cell 10, and pressure may be continuously accumulated in the case 11. If these pressures are not balanced or released in time, the case 11 is deformed and leaked slightly, and explosion will occur slightly seriously, so an explosion-proof structure capable of exhausting and releasing pressure quickly needs to be arranged to solve the problem of battery self-explosion, for example, a notch is arranged on the case 11 to be used as the explosion-proof structure 15, when the temperature of the internal gas of the battery cell 10 is raised and the pressure in the case 11 reaches a certain threshold value, the notch is desoldered and broken, and the gas in the case 11 is discharged for releasing pressure.

Through designing the casing 11 both sides of battery monomer 10 into different shapes, not only realized the directional installation of battery monomer 10, in addition can also ensure that some subassemblies on the casing 11 can realize fixed orientation, for example set up explosion-proof structure 15 on cambered surface structure 112 of casing 11, and planar structure 111 is used for contacting other subassemblies or other battery monomer 10, use this kind of structure to make explosion-proof structure 15 can keep away from other battery monomer 10 or other subassemblies, make explosion-proof structure 15's blasting quicker, further promote the security performance of battery monomer 10, also reduce the influence to other subassemblies.

In some embodiments, cell 10 further includes at least one vent disposed on positive electrode assembly 13 and/or negative electrode assembly 14. On the basis that 11 inner spaces of casing increase, can increase the exhaust hole on the pole piece subassembly at 11 both ends of casing, can effectively promote 11 exhaust effects of casing, in time to the pressure release in 11 casings, avoid battery monomer 10 inflation and explosion, further promote the free security performance of battery.

According to some other embodiments of the present application, referring to fig. 6, the present application provides a battery module 100 including at least two battery cells 10 shown in fig. 5, and further including at least one water-cooling plate 20 disposed between the battery cells 10, wherein each battery cell 10 contacts the water-cooling plate 20 through a planar structure 111. The water cooling plate 20 is a component for dissipating heat from the single battery 10, and prevents the single battery 10 from being damaged due to an excessively high temperature during operation, and the water cooling plate 20 generally dissipates heat from the single battery 10 in a heat exchange manner, so that stable contact between the water cooling plate 20 and the single battery 10 is crucial.

In the technical scheme of the embodiment of the application, because one side of the shell 11 of the single battery 10 is provided with the planar structure 111, the single battery 10 is vertically attached to the water cooling plate 20 through the planar structure 111, the water cooling plate 20 can be made into a plane, and a serpentine plate with a complex process is not required to be made, so that the process is simpler, the requirement on the dimensional accuracy is reduced, the cost of the water cooling plate 20 is reduced, and the cost of the battery module 100 is further reduced; in addition, the difficulty of grouping the battery cells 10 is also reduced; meanwhile, when the single battery 10 is in a group, the single battery 10 cannot be tightly attached to the water cooling plate 20 due to the poor positions of the snake-shaped plate and the arc size and other factors, the adhesive interface is more reliable, and the safety performance of the battery module 100 is improved.

According to other embodiments of the present application, referring to fig. 7, an electric device 16 is provided, which includes the battery cell 10 in the above embodiments, and the battery cell 10 is used for providing electric energy. Due to the improved performance of the battery cell 10, the stability of the electric device 16 during the use process can also be improved.

According to some embodiments of the present application, the powered device 16 further comprises: at least two battery cells 10; at least one water-cooling plate 20 is disposed between at least two battery cells 10, and each battery cell 10 contacts the water-cooling plate 20 through the planar structure 111. The battery module 100 composed of the battery cells 10 in the above embodiment can also be used to supply power to the electric device 16.

Through the technical scheme, by changing the structure of the shell 11 of the single battery, the single battery 10 is vertically attached to the water cooling plate 20 through the plane structure 111, the water cooling plate 20 can be made into a plane, a snake-shaped plate with a complex process is not required to be made, the process is simpler, the requirement on the size precision is reduced, the cost of the water cooling plate is reduced, and the cost of the battery module 100 is further reduced; in addition, the difficulty of grouping the battery cells 10 is also reduced; meanwhile, when the battery monomer 10 is in a group, the battery monomer cannot be tightly attached to the water cooling plate 20 due to the factors such as the position of the snake-shaped plate and the poor size of the circular arc, the adhesive interface is more reliable, the heat dissipation effect of the water cooling plate 20 is better, and the safety of the battery module 100 is improved. This also further improves the safety and stability of the powered device 16 during use.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (11)

1. A battery cell, comprising:

the shell (11), one side of the shell (11) is provided with a plane structure, the other side of the shell is provided with an arc surface structure (112), and the plane structure (111) and two ends of the arc surface structure (112) are connected with each other to form a whole with a hollow structure inside;

at least one electric core assembly (12) is arranged in the shell (11) and has a gap (113) with the shell (11).

2. The battery cell according to claim 1, characterized in that the at least one core assembly (12) is a cylindrical core which fits with the arc-shaped structure (112).

3. The battery cell according to claim 1, characterized in that a gap (113) between the at least one cell assembly (12) and the housing (11) is filled with an electrolyte.

4. The battery cell according to claim 1, further comprising a positive electrode assembly (13) and a negative electrode assembly (14) respectively disposed at both ends of the case (11) and adapted to the shape and size of the cross-section of the case (11).

5. The battery cell according to claim 1, characterized in that the housing (11) is an aluminum housing.

6. The battery cell according to any of claims 1-5, characterized in that the battery cell further comprises at least one explosion-proof structure (15) arranged on the arc-shaped structure (112).

7. The battery cell according to claim 4, further comprising at least one vent hole disposed on the positive electrode assembly (13) and/or the negative electrode assembly (14).

8. A battery module comprising at least two battery cells according to any one of claims 1 to 7, and further comprising at least one water-cooled plate (20) disposed between the battery cells, each of the battery cells contacting the at least one water-cooled plate (20) through the planar structure (111).

9. A battery pack comprising at least two battery modules according to claim 8 connected in series or in parallel or in series-parallel.

10. An electric consumer, characterized in that the electric consumer comprises a battery cell according to any one of claims 1-8 for providing electric energy.

11. The powered device of claim 10, further comprising:

at least two of the battery cells;

at least one water-cooling plate (20) disposed between at least two of the battery cells, each of the battery cells contacting the at least one water-cooling plate through the planar structure (111).

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