CN216698671U - Battery cell, battery and consumer - Google Patents

Abstract

The application discloses battery monomer, battery and consumer. The battery cell includes: a housing; the first electrode terminal and the second electrode terminal are opposite in polarity and are respectively arranged at two opposite ends of the shell in the first direction; wherein projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction do not overlap. The technical scheme that this application provided can improve the energy density of battery.

Description

Battery cell, battery and consumer

Technical Field

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

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and the electric vehicle becomes an important component 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 development of battery technology, how to improve the energy density of a battery is a technical problem to be solved urgently in the battery technology.

SUMMERY OF THE UTILITY MODEL

The application provides a battery cell, a battery and an electric device, which can improve the energy density of the battery.

In a first aspect, the present application provides a battery cell comprising: a housing; the first electrode terminal and the second electrode terminal are opposite in polarity and are respectively arranged at two opposite ends of the shell in the first direction; wherein projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction do not overlap.

According to the technical scheme of the embodiment of the application, the first electrode terminal and the second electrode terminal are arranged on the shell, so that the projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction are not overlapped, when a plurality of battery cells are connected in series in the first direction, the first electrode terminal of one battery cell and the second electrode terminal of the other battery cell in two adjacent battery cells are mutually dislocated, the dislocated first electrode terminal and the second electrode terminal are not butted with each other in the first direction, the gap size between the two adjacent battery cells is smaller than the length sum of the first electrode terminal and the second electrode terminal in the first direction, the electrode terminals with opposite polarities of the adjacent battery cells are butted with each other in the first direction (the gap size between the two adjacent battery cells is equal to the length sum of the first electrode terminal and the second electrode terminal in the first direction), with a smaller gap. Therefore, when a plurality of battery cells are arranged in a group on one side to form a battery, because a smaller gap exists between two adjacent battery cells, namely, the electrode terminal occupies less space of the battery, the size of the battery can be reduced under the condition of the same number of battery cells, or more battery cells can be arranged in the battery with the same size, and the energy density of the battery is improved.

In some embodiments, projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction are continuously provided.

The relative positions of the first electrode terminal and the second electronic terminal are set, so that the first electrode terminal and the second electrode terminal are continuously arranged in a plane perpendicular to the first direction, when the single batteries are placed on the sides of the single batteries to form a battery, the first electrode terminal of one battery in two adjacent single batteries is lapped on the second electrode terminal of the other battery, the assembly difficulty of the battery is reduced, and the grouping efficiency of the battery is improved.

In some embodiments, the first electrode terminal and the second electrode terminal are magnetic and opposite in magnetism.

Through setting up first electrode terminal and second electrode terminal to have magnetism and magnetism opposite, can be when battery monomer side puts into group and forms the battery for one of them free first electrode terminal of battery in two adjacent battery monomers and the free second electrode terminal magnetic adsorption of another battery guarantee on the one hand that the two has higher connection stability, prevent the two from separating easily, on the other hand, because magnetic force has the effect of guide connection, can reduce the free assembly degree of difficulty of battery, improve the free efficiency of uniting of battery.

In some embodiments, the housing includes a first surface and a second surface opposite to each other in the first direction, the first electrode terminal protrudes from the first surface, the second electrode terminal protrudes from the second surface, and a height of the first electrode terminal protruding from the first surface is equal to a height of the second electrode terminal protruding from the second surface.

Through setting the height of the first electrode terminal and the height of the second electrode terminal to be consistent, when the single batteries are placed on the single battery sides to form a battery, the surfaces of the two adjacent single batteries in the first direction are completely overlapped, so that the size of the gap between the two adjacent single batteries is equal to the size of the first electrode terminal (the second electrode terminal) in the first direction, compared with a scheme that the first electrode terminal is mutually butted with the second electrode terminal in the first direction, the size of the gap between the two adjacent single batteries is reduced by half, and the energy density of the battery is effectively improved.

In some embodiments, the battery cell is a prismatic battery cell; the first direction is a length direction of the battery cell, and projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction are arranged along a width direction or a thickness direction of the battery cell.

The relative positions of the first electrode terminal and the second electronic terminal are set, so that the projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction are arranged along the width direction or the thickness direction of the battery monomer, when the battery monomer is a square battery monomer, the projections are arranged in the determined reference direction (the length direction, the width direction and the thickness direction are all the reference directions capable of being determined) inclined to the battery monomer, the manufacturing difficulty of the battery monomer can be reduced, and the grouping efficiency of the battery monomer is facilitated.

In a second aspect, the present application provides a battery comprising: a box body; the battery monomer group is arranged in the box body and comprises a plurality of battery monomers in any one of the first aspect, the battery monomers in the battery monomer group are arranged along the first direction, and the first electrode terminal of one of the battery monomers is connected with the second electrode terminal of the other battery monomer.

According to the technical scheme of the embodiment of the application, the first electrode terminal of one of the two adjacent battery cells and the second electrode terminal of the other battery cell are staggered, the first electrode terminal of one of the two adjacent battery cells is not butted with the second electrode terminal of the other battery cell in the first direction, but is connected with each other in the first direction perpendicular to the first direction, and compared with the scheme that the electrode terminals of the adjacent battery cells, which are opposite in polarity, are butted with each other in the first direction, the gap is smaller, so that more battery cells can be accommodated in a box body with the same size, or the same number of battery cells can be accommodated in a smaller box body, and further the energy density of the battery is improved.

In some embodiments, the first electrode terminal includes a first end surface perpendicular to the first direction and a first side surface perpendicular to the first end surface; the first electrode terminal comprises a second end surface and a second side surface, the second end surface is perpendicular to the first direction, and the second side surface is perpendicular to the second end surface; wherein the first side surface of the first electrode terminal of one of the adjacent two battery cells is connected to the second side surface of the second electrode terminal of the other battery cell.

Two adjacent battery monomers realize the series connection of the two through first side and second side interconnect, adopt the scheme that electrically conductive piece realizes establishing ties, can reduce the assembly degree of difficulty of battery, improve the battery efficiency of uniting.

In some embodiments, the battery includes a plurality of the battery cell groups arranged in a second direction perpendicular to the first direction with a gap between adjacent two of the battery cell groups.

In the second direction, two adjacent battery monomers are arranged at intervals, so that the problem of extrusion deformation caused by expansion of the battery monomers during charging and discharging can be solved, and the safety of the battery is improved.

In some embodiments, the battery further comprises a bus member; the plurality of battery cell groups are connected in series or in parallel through the bus bar member.

By providing the bus member, all the battery cell groups can be electrically connected, so that the battery can effectively output electric energy to supply power to the electric equipment.

In a third aspect, the present application provides a powered device, comprising: an electric equipment body; and the battery according to any one of the second aspect, configured to supply power to the electric device body.

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

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded schematic view of a battery according to some embodiments of the present application;

fig. 3 is a perspective view of a battery cell in some embodiments of the present application;

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

FIG. 5 is a schematic view of a projection of a first electrode terminal and a second electrode terminal in some embodiments of the present application;

fig. 6 is a perspective view of two battery cells connected in series in a first direction in some embodiments of the present application;

FIG. 7 is a schematic view of a battery cell according to some embodiments of the present disclosure;

FIG. 8 is a schematic view of a projection of a first electrode terminal and a second electrode terminal in some embodiments of the present application;

FIG. 9 is a schematic view of a projection of a first electrode terminal and a second electrode terminal of further embodiments of the present application;

fig. 10 is an exploded view of a battery according to some embodiments of the present application.

Icon: 1000-a vehicle; 300-a controller; 200-a motor; 100-a battery; 20-a box body; 21-a first tank portion; 22-a second tank portion;

10-a battery cell; 10A-cell stack; 11-a housing; 110-a first surface; 111-a second surface; 12-a first electrode terminal; 120-a first end face; 121-a first side; 13-a second electrode terminal; 130-a second end face; 131-second side.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 in the description of the application in the present application 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. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification 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 specification. 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.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: there are three cases of A, A and B, and B. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments of the present application, like reference numerals denote like parts, and a detailed description of the same parts is omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

The appearances of "a plurality" in this application are intended to mean more than two (including two).

In this application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, and the embodiment of the present application is not limited thereto. The battery cells are generally divided into three types in an encapsulation manner: the battery pack comprises a cylindrical battery monomer, a square battery monomer and a soft package battery monomer, and the embodiment of the application is not limited to the above.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing a plurality of battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode piece, a negative electrode piece and a separator. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece comprises a positive current collector and a positive active substance layer, and the positive active substance layer is coated on the surface of the positive current collector; the positive current collector comprises a positive current collecting part and a positive electrode lug, wherein the positive current collecting part is coated with a positive active substance layer, and the positive electrode lug is not coated with the positive active substance layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece comprises a negative pole current collector and a negative pole active substance layer, and the negative pole active substance layer is coated on the surface of the negative pole current collector; the negative current collector comprises a negative current collecting part and a negative electrode lug, wherein the negative current collecting part is coated with a negative active material layer, and the negative electrode lug is not coated with the negative active material layer. The material of the negative electrode current collector may be copper, the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may be carbon, silicon, or the like. The material of the spacer may be PP (polypropylene) or PE (polyethylene).

The battery cell further includes a case for accommodating the electrode assembly, the case being provided with an electrode lead-out hole for mounting an electrode terminal, the electrode terminal being electrically connected to a tab of the electrode assembly through a current collecting member to enable charging and discharging of the electrode assembly, the electrode terminal connected to the positive tab may be referred to as a positive electrode terminal, and the electrode terminal connected to the negative tab may be referred to as a negative electrode terminal.

At present, from the development of market conditions, electric vehicles become an important component of sustainable development of the automobile industry. The battery supplies energy for the travel of the vehicle body and the operation of various electrical components in the vehicle body. The energy density of the battery is a main factor influencing the endurance of the electric vehicle, and therefore how to improve the energy density of the battery is a technical problem to be solved urgently in the battery technology.

At present, in a scheme that a battery is formed by grouping battery cells in a side-discharge manner, a plurality of battery cells are connected in series in a row along a first direction, a plurality of rows of battery cells are stacked in a row along a second direction, the first direction can be the length direction of the battery cells, and the second direction is perpendicular to the first direction. In each row of battery cells, the positive electrode terminal of one battery cell and the negative electrode terminal of the other battery cell in two adjacent battery cells are butted with each other in the first direction to realize the electrical connection of the two battery cells. However, the positive electrode terminal and the negative electrode terminal are butted in the first direction (the end surfaces of the positive electrode terminal and the negative electrode terminal in the first direction are butted with each other), a gap with a size of two electrode terminals is formed between two adjacent single batteries, so that the two electrode terminals occupy a larger space of the battery, and further, the energy density of the battery is affected.

In view of this, in order to improve the energy density of the battery, the inventors have conducted extensive studies to design a battery cell including a case, and first and second electrode terminals having opposite polarities. The first electrode terminal and the second electrode terminal are respectively arranged at two opposite ends of the shell in the first direction. Wherein projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction do not overlap.

When a plurality of battery cells are connected in series in the first direction, the first electrode terminal of one battery cell and the second electrode terminal of the other battery cell in two adjacent battery cells are staggered so as not to butt against each other in the first direction, the size of a gap between the two adjacent battery cells is smaller than the sum of the lengths of the first electrode terminal and the second electrode terminal in the first direction, and the electrode terminals with opposite polarities of the two adjacent battery cells butt against each other in the first direction (the size of the gap between the two adjacent battery cells is equal to the sum of the lengths of the first electrode terminal and the second electrode terminal in the first direction), so that the gap is smaller. Therefore, when a plurality of battery cells are arranged in a group on the side to form a battery, because a small gap is formed between two adjacent battery cells, and the occupation of the electrode terminal to the battery space is small, compared with the scheme that the electrode terminals with opposite polarities are butted with each other in the first direction, the volume of the battery can be reduced under the condition of the same number of battery cells, or more battery cells can be arranged in the battery with the same volume, and the energy density of the battery is further improved.

The technical scheme described in the embodiment of the application is suitable for the battery and the electric equipment using the battery.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.

For convenience of explanation, the following embodiments will be described by taking an electric device as an example of a vehicle.

FIG. 1 is a schematic block diagram of a vehicle 1000 according to some embodiments of the present application.

The vehicle 1000 may be provided with a controller 300, a motor 200, and a battery 100 inside, the controller 300 being configured to control the battery 100 to supply power to the motor 200. For example, the battery 100 may be provided at the bottom or the head or tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operation power supply of the vehicle 1000 for a circuit system of the vehicle 1000, for example, for power demand for operation in starting, navigation, and running of the vehicle 1000. In another embodiment of the present application, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas, to provide driving power to the vehicle 1000.

Fig. 2 is an exploded schematic view of a battery 100 according to some embodiments of the present application. As shown in fig. 2, the battery 100 includes a case 20 and the battery cell 10, and the battery cell 10 is accommodated in the case 20.

The case 20 is used to accommodate the battery cells 10, and the case 20 may have various structures. In some embodiments, the case 20 may include a first case portion 21 and a second case portion 22, the first case portion 21 and the second case portion 22 cover each other, and the first case portion 21 and the second case portion 22 jointly define a receiving space for receiving the battery cell 10. The second casing part 22 may be a hollow structure with one open end, the first casing part 21 is a plate-shaped structure, and the first casing part 21 covers the open side of the second casing part 22 to form the casing 20 with a containing space; the first casing portion 21 and the second casing portion 22 may be hollow structures with one side open, and the open side of the first casing portion 21 may cover the open side of the second casing portion 22 to form the casing 20 having the accommodating space. Of course, the first casing portion 21 and the second casing portion 22 may be various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In order to improve the sealing property after the first casing portion 21 and the second casing portion 22 are connected, a sealing structure, such as a sealant or a sealing ring, may be provided between the first casing portion 21 and the second casing portion 22.

Assuming that the first box portion 21 covers the top of the second box portion 22, the first box portion 21 may also be referred to as an upper box cover, and the second box portion 22 may also be referred to as a lower box 20.

In the battery 100, the battery cell 10 may be plural. The plurality of battery cells 10 are arranged in a group, the plurality of battery cells 10 are connected in series in a row along a first direction, and the plurality of rows of battery cells 10 are stacked in a row along a second direction. The first direction may be a length direction of the battery cell 10, and the second direction is perpendicular to the first direction. The plurality of rows of single cells 10 may be connected in series or in parallel or in series-parallel by a bus member (not shown), and the series-parallel refers to both series connection and parallel connection among the plurality of single cells 10. The bus members may be one or more, each for electrically connecting at least two rows of the battery cells 10.

According to some embodiments of the present disclosure, please refer to fig. 3 to 5, fig. 3 is a perspective view of a battery cell 10 in some embodiments of the present disclosure, fig. 4 is a schematic view of the battery cell 10 in some embodiments of the present disclosure, and fig. 5 is a schematic view of a projection of a first electrode terminal 12 and a second electrode terminal 13 in some embodiments of the present disclosure. The battery cell 10 includes a case 11, a first electrode terminal 12 and a second electrode terminal 13 having opposite polarities. The first electrode terminal 12 and the second electrode terminal 13 are respectively provided at opposite ends of the case 11 in the first direction. Wherein projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction do not overlap. The first direction is indicated by reference X in the figure.

The first electrode terminal 12 may be a member to which a tab of an electrode assembly of the battery cell 10 is connected, and when the first electrode terminal 12 is connected with a negative tab of the electrode assembly, the first electrode terminal 12 may be referred to as a negative electrode terminal or a negative electrode post; when the first electrode terminal 12 is connected to a positive tab of the electrode assembly, the first electrode terminal 12 may be referred to as a positive electrode terminal or a positive electrode post.

The second electrode terminal 13 may be a member to which a tab of an electrode assembly of the battery cell 10 is connected, and when the second electrode terminal 13 is connected with a negative tab of the electrode assembly, the second electrode terminal 13 may be referred to as a negative electrode terminal or a negative electrode post; when the second electrode terminal 13 is connected to a positive tab of the electrode assembly, the second electrode terminal 13 may be referred to as a positive electrode terminal or a positive electrode post.

The polarities of the first electrode terminal 12 and the second electrode terminal 13 are opposite, which means that when the first electrode terminal 12 is a positive electrode terminal, the second electrode terminal 13 is a negative electrode terminal; or, when the first electrode terminal 12 is a negative electrode terminal, the second electrode terminal 13 is a positive electrode terminal. When a plurality of battery cells 10 are placed in a group to form the battery 100, the first electrode terminal 12 of one battery cell 10 of the adjacent two battery cells 10 is electrically connected to the second electrode terminal 13 of the other battery cell 10 in the first direction.

Projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction do not overlap, as shown in fig. 5, projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction do not overlap, that is, projections including the first electrode terminal 12 and the second electrode terminal 13 are adjacent, or the first electrode terminal 12 and the second electrode terminal 13 are spaced apart from each other, so that the first electrode terminal 12 and the second electrode terminal 13 are spatially displaced from each other.

Referring to fig. 6, fig. 6 is a perspective view illustrating two battery cells 10 connected in series in a first direction according to some embodiments of the present disclosure. By arranging the opposing positions of the first electrode terminal 12 and the second electrode terminal 13 such that the projections of the first electrode terminal 12 and the second electrode terminal 13 in the plane perpendicular to the first direction do not overlap, when the plurality of battery cells 10 are connected in series in the first direction, the first electrode terminal 12 of one battery cell 10 and the second electrode terminal 13 of the other battery cell 10 in two adjacent battery cells 10 are displaced from each other so as not to butt against each other in the first direction, such that the size of the gap between two adjacent battery cells 10 is smaller than the sum of the lengths of the first electrode terminal 12 and the second electrode terminal 13 in the first direction, and the electrode terminals of opposite polarity of the adjacent battery cells 10 butt against each other in the first direction (the size of the gap between two adjacent battery cells 10 is equal to the sum of the lengths of the first electrode terminal 12 and the second electrode terminal 13 in the first direction), with a smaller gap. Therefore, when a plurality of the battery cells 10 are arranged in a group on one side to form the battery 100, since the adjacent two battery cells 10 have a small gap therebetween, that is, the electrode terminals occupy a small space of the battery 100, and therefore, in the case of an equal number of the battery cells 10, the volume of the battery 100 can be reduced, or more battery cells 10 can be provided in the battery 100 having the same volume, and the energy density of the battery 100 can be improved.

According to some embodiments of the present application, as shown in fig. 5, projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction are continuously disposed.

"continuously disposed" means that the projections of the first electrode terminal 12 and the second electrode terminal 13 are closely adjacent to each other without a gap therebetween.

By arranging the relative positions of the first electrode terminal 12 and the second electronic terminal, the projections of the first electrode terminal 12 and the second electrode terminal 13 in the plane perpendicular to the first direction are continuously arranged, when the single batteries 10 are placed on one side to form the battery 100, the first electrode terminal 12 of one single battery 10 of the two adjacent single batteries 10 is lapped on the second electrode terminal 13 of the other single battery 10, the assembly difficulty of the battery 100 is reduced, and the grouping efficiency of the battery 100 is improved.

Alternatively, in other embodiments of the present application, projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction are spaced apart from each other. If the projections of the two are spaced from each other on a plane perpendicular to the first direction, when the two battery cells 10 are connected in series along the first direction, the first electrode terminal 12 and the second electrode terminal 13 of one of the battery cells 10 are misaligned and have a gap, and therefore, a conductive member is required to be assembled to fill the gap to electrically connect the two battery cells 10.

According to some embodiments of the present application, the first electrode terminal 12 and the second electrode terminal 13 have magnetic properties and are opposite in magnetic properties.

The first electrode terminal 12 and the second electrode terminal 13 have magnetism, which means that the first electrode terminal 12 and the second electrode terminal 13 may be made of a magnetic material, or the first electrode terminal 12 and the second electrode terminal 13 have a magnetic structure. The opposite magnetism means that when two battery cells 10 are connected in series in a first direction, since the magnetism of the first electrode terminal 12 of one of the battery cells 10 is opposite to the magnetism of the second electrode terminal 13 of the other battery cell 10, the two may be attracted to each other.

Through setting up first electrode terminal 12 and second electrode terminal 13 to have magnetism and magnetism opposite, can put into a group at a plurality of battery monomer 10 sides and form battery 100, make the first electrode terminal 12 of one of them battery monomer 10 in two adjacent battery monomers 10 and the second electrode terminal 13 magnetic adsorption of another battery monomer 10, guarantee on the one hand that the two have higher connection stability, prevent that the two from separating easily, on the other hand, because magnetic force has the effect of guide connection, can reduce the assembly degree of difficulty of battery monomer 10, improve battery monomer 10's group efficiency.

Alternatively, in the above-mentioned embodiment, the two battery cells 10 may form a stable connection relationship through a magnetic force, and in other embodiments, the connection stability between the battery cells 10 may be improved by welding, or the connection stability between the first electrode terminal 12 and the second electrode terminal 13 of the two battery cells 10 may be improved, for example, welding is performed on a surface where the first electrode terminal 12 of one battery cell 10 of the two adjacent battery cells 10 and the second electrode terminal 13 of the other battery cell 10 contact each other. In other embodiments, the connection stability between the battery cells 10, or the connection stability between the first electrode terminal 12 and the second electrode terminal 13 of two battery cells 10, may be improved in other manners, for example, a fixing sleeve is disposed between the first electrode terminal 12 of one battery cell 10 and the second electrode terminal 13 of the other battery cell 10 of two adjacent battery cells 10 to fix the first electrode terminal 12 and the second electrode terminal 13.

According to some embodiments of the present application, as shown in fig. 4, the housing 11 includes a first surface 110 and a second surface 111 opposite to each other along the first direction, the first electrode terminal 12 protrudes from the first surface 110, the second electrode terminal 13 protrudes from the second surface 111, and a height of the first electrode terminal 12 protruding from the first surface 110 is equal to a height of the second electrode terminal 13 protruding from the second surface 111.

The first surface 110 is a surface connected to the first electrode terminal 12, and the first electrode terminal 12 protrudes from the first surface 110. The second surface 111 is a surface connected to the second electrode terminal 13, and the second electrode terminal 13 protrudes from the second surface 111.

By setting the height of the first electrode terminal 12 and the height of the second electrode terminal 13 to be the same, when the battery cells 10 are placed in a group to form the battery 100, the surfaces of the two adjacent battery cells 10 in the first direction can be completely overlapped, so that the size of the gap between the two adjacent battery cells 10 is equal to the size of the first electrode terminal 12 (the second electrode terminal 13) in the first direction, and compared with a scheme in which the first electrode terminal 12 is butted with the second electrode terminal 13 in the first direction, the size of the gap between the two adjacent battery cells 10 is reduced by half, thereby effectively improving the energy density of the battery 100.

Please combine fig. 7 and 8, according to some embodiments of the present application. Fig. 7 is a schematic view of a battery cell 10 according to some embodiments of the present disclosure, and fig. 8 is a schematic view of a projection of a first electrode terminal 12 and a second electrode terminal 13 according to some embodiments of the present disclosure. The battery cell 10 is a square battery cell 10. The first direction is a length direction of the battery cell 10, and projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction are arranged in a width direction or a thickness direction of the battery cell 10.

Referring to fig. 3, the length direction, the width direction, and the thickness direction of the battery cell 10 are perpendicular to each other, and in the drawing, the length direction of the battery cell 10 is denoted by reference numeral X, the width direction is denoted by reference numeral Z, and the thickness direction is denoted by reference numeral Y. Among the length, width and thickness of the battery cells 10, the length is the largest of the three dimensions, and in the battery cell 10 side-put grouping scheme, the battery cells 10 are arranged in series along the length direction. The battery cell 10 has two opposite surfaces in the thickness direction, the two surfaces are large surfaces of the battery cell 10, and the large surface refers to a surface having the largest area of the battery cell 10.

By arranging the relative positions of the first electrode terminal 12 and the second electronic terminal, the projections of the first electrode terminal 12 and the second electrode terminal 13 in the plane perpendicular to the first direction are arranged along the width direction (as shown in fig. 5) or the thickness direction (as shown in fig. 8) of the single battery 10, and when the single battery 10 is a square single battery 10, compared with the arrangement in the determined reference direction (the length direction, the width direction and the thickness direction are all the determinable reference directions) of the single battery 10, the manufacturing difficulty of the single battery 10 can be reduced, and the grouping efficiency of the single battery 10 is facilitated.

Alternatively, in other embodiments, as shown in fig. 9, fig. 9 is a schematic view of a projection of the first electrode terminal 12 and the second electrode terminal 13 in other embodiments of the present application. A projection of the first electrode terminal 12 in a plane perpendicular to the first direction may be a ring shape, and a projection of the second electrode terminal 13 in a plane perpendicular to the first direction may be a shape filling the ring shape. For example, when the projection of the first electrode terminal 12 in the plane perpendicular to the first direction is a circular ring, the projection of the second electrode terminal 13 in the plane perpendicular to the first direction may be a circular shape filled in the circular ring.

According to some embodiments of the present application, there is also provided a battery 100, and in conjunction with fig. 10, fig. 10 is an exploded schematic view of the battery 100 according to some embodiments of the present application. The battery 100 includes a case 20 and a battery cell group 10A. The battery cell group 10A is disposed in the case 20, the battery cell group 10A includes a plurality of battery cells 10 described above, the plurality of battery cells 10 in the battery cell group 10A are arranged along a first direction, and the first electrode terminal 12 of one battery cell 10 of two adjacent battery cells 10 is connected to the second electrode terminal 13 of another battery cell 10.

The box 20 may include a first box portion 21 and a second box portion 22, the second box portion 22 may be a hollow structure with one end open, the first box portion 21 is a plate-shaped structure, and the first box portion 21 covers the open side of the second box portion 22 to form the box 20 having an accommodating space. The battery cell group 10A is disposed in the accommodation space.

Since the first electrode terminal 12 of one battery cell 10 and the second electrode terminal 13 of the other battery cell 10 of the adjacent two battery cells 10 are misaligned with each other, the first electrode terminal 12 of one of the battery cells 10 does not abut against the second electrode terminal 13 of the other battery cell 10 in the first direction, but are connected to each other in a direction perpendicular to the first direction, and have a smaller gap than a scheme in which the electrode terminals of the adjacent battery cells 10, which have opposite polarities, are butted against each other in the first direction (the size of the gap between the adjacent two battery cells 10 is equal to the sum of the lengths of the first electrode terminal 12 and the second electrode terminal 13 in the first direction), so that the case 20 of the same specification can accommodate more battery cells 10, or the same number of battery cells 10 can be accommodated in a smaller case 20, thereby increasing the energy density of the battery 100.

According to some embodiments of the present application, as shown in fig. 4, the first electrode terminal 12 includes a first end surface 120 and a first side surface 121, the first end surface 120 being perpendicular to the first direction, the first side surface 121 being perpendicular to the first end surface 120; the first electrode terminal 12 includes a second end surface 130 and a second side surface 131, the second end surface 130 is perpendicular to the first direction, and the second side surface 131 is perpendicular to the second end surface 130; wherein the first side surface 121 of the first electrode terminal 12 of one battery cell 10 of the two adjacent battery cells 10 is connected with the second side surface 131 of the second electrode terminal 13 of the other battery cell 10.

The first end surface 120 is an end surface of the first electrode terminal 12 in the first direction, that is, when the battery cells 10 are connected in series with each other in the first direction, the first end surface 120 is a surface closest to the adjacent battery cell 10. The second end face 130 is an end face of the second electrode terminal 13 in the first direction, that is, when the battery cells 10 are connected in series with each other in the first direction, the second end face 130 is a face closest to the adjacent battery cell 10.

The first side surface 121 is a surface connected to the second side surface 131 of the other battery cell 10, and the second side surface 131 is a surface connected to the first side surface 121 of the other battery cell 10.

Two adjacent single batteries 10 are connected with each other through the first side surface 121 and the second side surface 131 to realize series connection of the two single batteries, and compared with a scheme that the first electrode terminal 12 and the second electrode terminal 13 between the two adjacent single batteries 10 are spaced from each other to realize series connection by adopting a conductive piece, the assembly difficulty of the battery 100 can be reduced, and the grouping efficiency of the battery 100 is improved.

According to some embodiments of the present application, as shown in fig. 10, the battery 100 includes a plurality of battery cell groups 10A arranged in a second direction perpendicular to the first direction with a gap between adjacent two battery cell groups 10A.

When the battery cells 10 are square battery cells 10, the second direction may be a thickness direction of the battery cells 10, in which case, in the second direction, an opposite surface between two adjacent battery cells 10 is a large surface of the battery cell 10, and a surface of the battery 100 that is most subjected to expansion deformation during charging and discharging is a large surface. The two adjacent battery cell groups 10A have a gap therebetween, which means that the two adjacent battery cells 10 have a gap therebetween in the second direction, that is, are arranged at intervals.

In the second direction, two adjacent single batteries 10 are arranged at intervals, so that the problem of extrusion deformation caused by expansion of the single batteries 10 during charging and discharging can be solved, and the safety of the battery 100 can be improved.

Alternatively, in the second direction, the surfaces of the battery cells 10 on both sides facing the inner wall of the first case portion 21 are fixedly connected with the inner wall of the first case portion 21, and the fixed connection relationship may be bonding, so as to ensure the stability of the battery cells 10 in the case 20 by bonding the battery cells 10 to the inner wall of the first case portion 21.

According to some embodiments of the present application, the battery 100 further includes a bus member (not shown in the drawings). The plurality of battery cell groups 10A are connected in series or in parallel by the bus member.

The bus member is a member connecting the first electrode terminal 12 and the second electrode terminal 13 at the end of the battery cell group 10A such that the plurality of battery cell groups 10A are connected in series or in parallel with each other, and is used for charging and discharging the battery 100 to the outside to supply power to the outside. By providing the bus bar member, all the battery cell groups 10A can be electrically connected so that the battery 100 can efficiently output electric energy to supply power to the electric devices.

According to some embodiments of the present application, the present application also provides a powered device comprising a powered device body and a battery 100 according to the above description, the battery 100 being for supplying power to the powered device body.

Please refer to fig. 3-10, according to some embodiments of the present application. The present application provides a battery 100, the battery 100 including a case 20 and a plurality of battery cell groups 10A. The battery cell group 10A is disposed in the case 20 and protected by the case 20. The plurality of battery cell groups 10A are arranged in the second direction with a gap between two adjacent battery cell groups 10A. The battery cell group 10A includes a plurality of battery cells 10 arranged in a first direction. The battery cell 10 is a prismatic battery cell 10, and the battery cell 10 includes a case 11 and first and second electrode terminals 12 and 13 having opposite polarities. The first electrode terminal 12 and the second electrode terminal 13 are provided at opposite ends of the case 11 in the first direction. Wherein the projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction are continuously disposed, and the projections of the first electrode terminal 12 and the second electrode terminal 13 in a plane perpendicular to the first direction are arranged in the width direction or the thickness direction of the battery cell 10. In the battery cell group 10A, the first electrode terminal 12 of one battery cell 10 of the adjacent two battery cells 10 is overlapped with the second electrode terminal 13 of the other battery cell 10 in a staggered manner in the first direction to be connected in series with each other. Because the first electrode terminals 12 and the second electrode terminals 13 are overlapped in a staggered manner, compared with a scheme that the electrode terminals of the adjacent single batteries 10 with opposite polarities are butted with each other in the first direction, a smaller gap is formed between the two adjacent single batteries 10, so that the same size of the case 20 can accommodate more single batteries 10, or the same number of single batteries 10 can be accommodated in the smaller case 20, and the energy density of the battery 100 is further improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A battery cell, comprising:

a housing;

the first electrode terminal and the second electrode terminal are opposite in polarity and are respectively arranged at two opposite ends of the shell in the first direction;

wherein projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction do not overlap.

2. The battery cell of claim 1,

projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction are continuously provided.

3. The battery cell of claim 1,

the first electrode terminal and the second electrode terminal have magnetism and are opposite in magnetism.

4. The battery cell of claim 1,

the shell comprises a first surface and a second surface which are opposite to each other along the first direction, the first electrode terminal protrudes out of the first surface, the second electrode terminal protrudes out of the second surface, and the height of the first electrode terminal protruding out of the first surface is equal to the height of the second electrode terminal protruding out of the second surface.

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

the battery monomer is a square battery monomer;

the first direction is a length direction of the battery cell, and projections of the first electrode terminal and the second electrode terminal in a plane perpendicular to the first direction are arranged along a width direction or a thickness direction of the battery cell.

6. A battery, comprising:

a box body;

a battery cell group disposed in the box, the battery cell group including a plurality of battery cells according to any one of claims 1 to 5, the plurality of battery cells in the battery cell group being arranged along the first direction, and the first electrode terminal of one of the adjacent two battery cells being connected to the second electrode terminal of the other battery cell.

7. The battery according to claim 6,

the first electrode terminal includes a first end surface perpendicular to the first direction and a first side surface perpendicular to the first end surface;

the first electrode terminal comprises a second end surface and a second side surface, the second end surface is perpendicular to the first direction, and the second side surface is perpendicular to the second end surface;

wherein the first side surface of the first electrode terminal of one of the adjacent two battery cells is connected to the second side surface of the second electrode terminal of the other battery cell.

8. The battery according to claim 6,

the battery comprises a plurality of battery monomer groups arranged along a second direction, the second direction is perpendicular to the first direction, and a gap is formed between every two adjacent battery monomer groups.

9. The battery according to claim 8,

the battery further includes a bus member;

the plurality of battery cell groups are connected in series or in parallel through the bus bar member.

10. An electrical device, comprising:

an electric equipment body; and

the battery according to any one of claims 6 to 9, for supplying power to the electric device body.

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