CN221150226U - Battery and electric equipment - Google Patents

Abstract

The application discloses a battery and electric equipment. The battery cell group comprises a plurality of battery cells arranged along a first direction, the first binding assembly is used for binding the battery cell group, and at least part of the first binding assembly passes through between two adjacent battery cells. The first binding assembly not only can simplify the assembly process of the battery and improve the assembly efficiency, but also can reduce the cost and improve the reliability of the battery.

Description

Battery and electric equipment

Technical Field

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

Background

Along with the development of new energy technology, the application of the battery is more and more extensive, the battery has higher energy density, higher safety, long service life and environmental protection to the social environment, and the battery has been widely applied to the aspects of passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, power stations, engineering manufacture, intelligent appliances and the like, and simultaneously promotes the technical development and research of communication terminals, medical appliances, energy development and the like.

With the development of battery technology, higher requirements are put on batteries, and if the reliability of the batteries is improved, the batteries become difficult problems in the industry.

Disclosure of utility model

The embodiment of the application provides a battery and electric equipment, which can effectively improve the reliability of the battery.

In a first aspect, an embodiment of the present application provides a battery including a battery cell stack and a first bundling assembly. The battery cell group comprises a plurality of battery cells arranged along a first direction, a first binding assembly is used for binding the battery cell group, and at least part of the first binding assembly passes through between two adjacent battery cells.

Among the above-mentioned technical scheme, set up first binding and bind a plurality of battery monomer and make the technical scheme who makes into groups, cancelled original curb plate, the cost is reduced, saved lateral wall and end plate welded process, simplified assembly process to first binding can hinder the colloid to overflow between the adjacent battery monomer between adjacent battery monomer, reduces the overflow volume of colloid between two adjacent battery monomers, has improved the reliability of battery. The first binding assembly not only can simplify the assembly process of the battery and improve the assembly efficiency, but also can reduce the cost and improve the reliability of the battery.

In some embodiments, the first binding assembly includes a first binding member passing between each adjacent two of the battery cells and a second binding member passing between each adjacent two of the battery cells, the first binding member and the second binding member applying tightening forces to the same battery cell in opposite directions.

According to the technical scheme, the first binding piece passes through every two adjacent battery monomers, the second binding piece passes through every two adjacent battery monomers, the directions of tightening forces applied to the same battery monomer by the first binding piece and the second binding piece are opposite, so that each battery monomer is stressed and balanced, and the integration level of the battery monomer group is improved.

In some embodiments, along the first direction, a projection of the first bundle does not overlap with a projection of the second bundle.

In the technical scheme, the first binding component comprises the first binding piece and the second binding piece which are arranged in a staggered mode, so that the first binding piece and the second binding piece are arranged in a staggered mode, the first binding piece is arranged on one plane, the second binding piece is arranged on the other plane, the possibility that the flatness of the first binding piece or the second binding piece is affected due to the fact that the first binding piece and the second binding piece are avoided mutually is reduced, the damage risk to the insulating film of the battery is reduced, and the reliability of the battery is improved.

In some embodiments, the first tie-down point is located on one side of the battery cell stack in a second direction, and the second tie-down point is located on the other side of the battery cell stack in the second direction, the second direction being perpendicular to the first direction.

In the above technical scheme, the head-tail connection point of the first binding member is located at one side of the battery monomer group along the second direction, tightening of a plurality of battery monomers is facilitated, the integration level of the battery is improved, meanwhile, the first binding member and the second binding member are facilitated to synchronously tighten the battery monomer group at two sides of the battery monomer group, and head-tail connection work of the first binding member and head-tail connection work of the second binding member are synchronously performed, so that the battery grouping efficiency is improved.

In some embodiments, the first binding is end-to-end hot-melt joined and/or the second binding is end-to-end hot-melt joined.

In the technical scheme, the head-tail hot melting of the first binding piece can improve the connection stability of the head-tail connection point of the first binding piece, and the head-tail hot melting of the second binding piece can improve the connection stability of the head-tail connection point of the first binding piece.

In some embodiments, an electrode terminal is disposed at one end of the battery cell along a third direction, the first binding assembly binds one end of each battery cell away from the electrode terminal, and the first direction, the second direction, and the third direction are perpendicular to each other.

In the above technical scheme, the first binding assembly binds one end of each battery cell far away from the electrode terminal, can inhibit the colloid from overflowing to the space between two adjacent battery cells, and inhibit the colloid from spreading towards the direction of the battery cell provided with the electrode terminal.

In some embodiments, an electrode terminal is disposed at one end of the battery cells in a third direction, and the first binding assembly binds one end of each of the battery cells remote from the electrode terminal, the third direction being perpendicular to the first direction.

In some embodiments, the battery further comprises a second binding assembly for binding the battery cell group, at least a portion of the second binding assembly passing between two adjacent battery cells; the first binding assembly and the second binding assembly are arranged at intervals along the third direction, and the second binding assembly binds one end, close to the electrode terminal, of each battery cell.

According to the technical scheme, the second binding assembly is arranged on the basis of the first binding assembly, so that the binding stability can be improved, and the stability of the battery monomer group can be improved.

In some embodiments, the second binding assembly includes a third binding member passing between each adjacent two of the battery cells and a fourth binding member passing between each adjacent two of the battery cells, the third binding member and the fourth binding member applying tightening force to the same battery cell in opposite directions.

In some embodiments, the battery cells are rectangular parallelepiped.

In some embodiments, the battery further comprises a box body, the battery cell group is arranged in the box body, and the bottom wall of the box body is connected with the battery cell group through colloid.

In a second aspect, an embodiment of the present application provides an electric device, where the electric device includes a battery provided in any embodiment of the first aspect, and the battery is used to supply power to the electric device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the application;

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

FIG. 3 is an exploded view of a battery cell according to some embodiments of the present application;

fig. 4 is a schematic structural view of a battery according to some embodiments;

Fig. 5 is a schematic view of a battery according to another embodiment of the present application;

Fig. 6 is a schematic view illustrating the structure of a battery according to other embodiments of the present application;

Fig. 7 is a schematic view of a battery according to still other embodiments of the present application.

Icon: 100-cell; 10-battery cell group; 11-battery cells; 111-end caps; 112-an electrode assembly; 113-a housing; 114-electrode terminals; 11 a-a first cell; 11 b-a second battery cell; 11 c-a third cell; 11 d-fourth cell; 11 e-fifth cell; 11 f-sixth battery cell; 11 h-seventh cell; 11 j-eighth battery cell; 11 k-ninth cell; 20-a box body; 21-a first part; 22-a second part; 23-accommodation space; 30-a first strapping assembly; 31-a first tie; 32-a second tie; 40-a second strapping assembly; 41-a third bundle; 42-fourth tie; 1000-vehicle; 200-motor; 300-a controller; x-a first direction; y-a second direction; z-third direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily 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 may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication 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 according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

In the present application, the battery cell may include, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. The battery cells include, but are not limited to, cylinders, flat bodies, rectangular solids, or other shapes, etc. The battery cells generally comprise cylindrical battery cells, square battery cells, soft package battery cells and the like in a packaging mode.

Reference to a battery in accordance with an embodiment 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, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a roll-to-roll structure or a lamination structure, and embodiments of the present application are not limited thereto.

The development of battery technology is taking into consideration various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, and the reliability of the battery.

Generally, the battery includes the box and holds a plurality of battery monomer in the box, and the in-process of battery group, battery monomer bond with the diapire of box through the colloid generally, but the colloid solidifies and needs certain time, and under the effect of battery monomer gravity, the colloid can be toward the single edge diffusion of battery and spill to the single side of battery, spill to the clearance department between two adjacent batteries and influence the reliability of battery. Specifically, the colloid overflows to the gap between two adjacent batteries, and the colloid can squeeze the large surface of the battery monomer to prevent the battery monomer from expanding, so that the wettability of the electrolyte is affected to cause lithium precipitation. The colloid that overflows solidifies the back and has sharp-pointed corner, and there is stress concentration in corner and the single casing of battery, can break the insulating film of battery single periphery and break the insulating layer between single and the end plate. In addition, the colloid overflows to the clearance department between two adjacent batteries and also can adjacent influence the single interval of battery, makes original interval widen, leads to the electrode terminal of single battery to misplace with the junction on the pencil division board.

In view of this, in order to solve the problem of glue overflow when the battery cells are adhered to the case, the embodiment of the application provides a technical scheme that the battery comprises a binding assembly for binding a plurality of battery cells, and at least part of the binding assembly passes through between two adjacent battery cells. Through setting up the subassembly of binding, bind the subassembly and not only can bind the battery monomer and make a plurality of battery monomers make into groups but also can restrain the degree that the colloid overflowed between two adjacent battery monomers, make the colloid little overflow or not spill to between two adjacent battery monomers.

The technical scheme described by 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 fuel 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; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric equipment in particular.

For convenience of description, the following embodiments take the electric device as the vehicle 1000 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application, a battery 100 is disposed in the vehicle 1000, and the battery 100 may be disposed at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000.

The vehicle 1000 may also include a controller 300 and a motor 200, the controller 300 being configured to control the battery 100 to power the motor 200, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

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

In some embodiments, referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application, and the battery 100 includes a plurality of battery cells 11. The plurality of battery cells 11 may be connected in series, parallel or series-parallel. The series-parallel connection refers to that the plurality of battery cells 11 are connected in series or in parallel.

In some embodiments, the battery 100 may further include a bus bar (not shown), through which the plurality of battery cells 11 may be electrically connected to each other, so as to realize serial connection, parallel connection, or a series-parallel connection of the plurality of battery cells 11.

The bus member may be a metal conductor such as copper, iron, aluminum, steel, aluminum alloy, or the like.

In some embodiments, battery 100 may further include a case 20, case 20 for accommodating battery cell 11. The case 20 may include a first portion 21 and a second portion 22, and the first portion 21 and the second portion 22 are overlapped with each other to define an accommodating space 23 for accommodating the battery cell 11. Of course, the connection between the first portion 21 and the second portion 22 may be sealed by a sealing element (not shown), which may be a sealing ring, a sealant, or the like.

The first portion 21 and the second portion 22 may have various shapes, such as a rectangular parallelepiped, a cylinder, and the like. The first portion 21 may be a hollow structure with one side opened, and the second portion 22 may be a hollow structure with one side opened, and the open side of the second portion 22 is closed to the open side of the first portion 21, so that the case 20 having the accommodating space 23 is formed. Of course, the first portion 21 may be a hollow structure with one side open, the second portion 22 may be a plate-like structure, and the second portion 22 may be covered on the open side of the first portion 21 to form the case 20 having the accommodation space 23.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 11 according to some embodiments of the present application, and the battery cell 11 may include a case 113, an electrode assembly 112, an end cap 111, and other functional components.

The case 113 is a member for accommodating the electrode assembly 112, and the case 113 may have a hollow structure having one end opened, or the case 113 may have a hollow structure having both ends opened. The material of the housing 113 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The housing 113 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc. Illustratively, in fig. 3, the housing 113 is rectangular parallelepiped.

The end cap 111 is a member that covers the opening of the case 113 to isolate the internal environment of the battery cell 11 from the external environment. The end cap 111 covers the opening of the case 113, and the end cap 111 and the case 113 together define a sealed space for accommodating the electrode assembly 112, the electrolyte, and other functional components. The shape of the end cover 111 may be adapted to the shape of the housing 113, for example, the housing 113 is a cuboid structure, the end cover 111 is a rectangular plate structure adapted to the housing 113, for example, the housing 113 is a cylindrical structure, and the end cover 111 is a circular plate structure adapted to the housing 113. The material of the end cap 111 may also be various, and the end cap 111 may be a metal material, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 111 may be the same as or different from the material of the housing 113.

In the battery cell 11, the end caps 111 may be one or two. If the shell 113 is a hollow structure with one end forming an opening, one end cover 111 is correspondingly arranged; if the housing 113 has a hollow structure with openings formed at both ends, two end caps 111 are correspondingly disposed, and the two end caps 111 are respectively covered on the two openings of the housing 113.

Embodiments of the present application provide a battery 100 capable of reducing the amount of gel overflowing between two adjacent battery cells 11, and a specific structure of the battery 100 will be described in detail with reference to the accompanying drawings.

Referring to fig. 4 and 5, fig. 4 is a schematic structural view of a battery 100 to which some embodiments are applied; fig. 5 is a schematic view illustrating a structure of a battery 100 according to another view angle of some embodiments of the present application.

The embodiment of the application provides a battery 100, and the battery 100 comprises a battery cell group 10 and a first binding assembly 30. The battery cell group 10 includes a plurality of battery cells 11 arranged along a first direction X, the first binding assembly 30 is used to bind the battery cell group 10, and at least a portion of the first binding assembly 30 passes between two adjacent battery cells 11.

The shape of the battery cell 11 includes, but is not limited to, a rectangular parallelepiped, a cylindrical body, and the like. Illustratively, in fig. 4 and 5, the battery cells 11 are rectangular parallelepiped, the thickness direction of the battery cells 11 is parallel to the first direction X, a plurality of battery cells 11 are arranged along the thickness direction of the battery cells 11, and the top of the battery cells 11 is provided with electrode terminals 114.

The first binding assembly 30 is a member for binding the plurality of battery cells 11 to group the plurality of battery cells 11. The first strapping assembly 30 may be a strap, the material of which may be metal, rubber, plastic, etc. The first binding assembly 30 may be used to bind one end of the battery cell 11, which is remote from the electrode terminal 114, and may also be used to bind the middle of the battery cell 11.

At least a portion of the first binding assembly 30 passes between two adjacent battery cells 11, meaning that at least a portion of the first binding assembly 30 passes around between two adjacent battery cells 11. Illustratively, as shown in fig. 1, the first binding assembly 30 may pass around between every two adjacent battery cells 11, i.e., between two adjacent battery cells 11, with the first binding assembly 30 passing through. Of course, it is not required that the first binding assembly 30 passes between two adjacent battery cells 11 in other embodiments, that is, only passes between two adjacent battery cells 11 with severe glue overflow, and some portions of the battery cells 11 that do not need to be adhered to the case 20 by glue may not pass through the first binding member 31.

In the related art, a plurality of battery cells 11 are generally restrained in groups by welding end plates and side plates to enclose a space.

Compared with the technical scheme that a plurality of battery monomers 11 are restrained to be grouped through welding of the end plate and the side plate, the technical scheme that the first binding piece 31 binds a plurality of battery monomers 11 to be grouped is adopted, the side plate is omitted, the cost is reduced, the procedure of welding the side wall and the end plate is omitted, the assembly process is simplified, the first binding piece 31 can prevent the colloid from overflowing between the adjacent battery monomers 11 through between the adjacent battery monomers 11, the overflowing amount of the colloid between the two adjacent battery monomers 11 is reduced, and the reliability of the battery 100 is improved.

The first binding assembly 30 not only simplifies the assembly process of the battery 100 and improves the assembly efficiency, but also reduces the cost and improves the reliability of the battery 100.

Referring to fig. 5, in some embodiments, the first binding assembly 30 includes a first binding member 31 passing between each adjacent two of the battery cells 11 and a second binding member 32 passing between each adjacent two of the battery cells 11, the first binding member 31 and the second binding member 32 applying a tightening force to the same battery cell 11 in opposite directions.

The first binding member 31 passes between each adjacent two of the battery cells 11, that is, the adjacent two battery cells 11 have a gap therebetween, and the first binding member 31 passes through the gap between the adjacent two battery cells 11. The second binding member 32 passes between each adjacent two of the battery cells 11, i.e., with a gap between the adjacent two of the battery cells 11, and the second binding member 32 passes at the gap between the adjacent two of the battery cells 11.

The opposite directions of the tightening force applied to the same battery cell 11 by the first binding member 31 and the second binding member 32 mean that one battery cell 11 receives two opposite directions of force so as to be balanced.

Illustratively, to facilitate distinguishing the first bundle 31 from the second bundle 32, the second bundle 32 is shown in phantom in FIG. 5, and accordingly, another solid line is the first bundle 31. Illustratively, as shown in fig. 5, the battery cell stack 10 includes nine battery cells 11, which are a first battery cell 11a, a second battery cell 11b, a third battery cell 11c, a fourth battery cell 11d, a fifth battery cell 11e, a sixth battery cell 11f, a seventh battery cell 11h, an eighth battery cell 11j, and a ninth battery cell 11k, respectively. The first binding member 31 passes through between every two adjacent battery cells 11, and after the first binding member 31 is tightened in an end-to-end connection manner, a closed loop can be formed, and the first battery cell 11a, the third battery cell 11c, the fifth battery cell 11e, the seventh battery cell 11h and the ninth battery cell 11k are located in the closed loop formed by the first binding member 31. The second binding member 32 passes between every two adjacent battery cells 11, and after the second binding member 32 is tightened in an end-to-end connection manner, a further closed loop can be formed, and the first battery cell 11a, the third battery cell 11c, the fifth battery cell 11e, the seventh battery cell 11h and the ninth battery cell 11k are positioned in the closed loop formed by the second binding member 32. The first cell 11a, the third cell 11c, the fifth cell 11e, the seventh cell 11h, and the ninth cell 11k are located both within the closed loop formed by the first tie 31 and within the closed loop formed by the second tie 32. So that the first binding member 31 applies a tightening force to the first battery cell 11a in the B direction while the second binding member 32 applies a tightening force to the first battery cell 11a in the a direction, the a direction and the B direction being opposite, the first battery cell 11a receives the tightening forces in both opposite directions to maintain balance.

Similarly, the third battery cell 11c, the fifth battery cell 11e, the seventh battery cell 11h, and the ninth battery cell 11k are also subjected to tightening forces in opposite directions of the a direction and the B direction, thereby maintaining balance. Since the first binding member 31 and the second binding member 32 cross between the adjacent battery cells 11, the first binding member 31 applies a tightening force to the second battery cell 11B in the a direction, and the second binding member 32 applies a tightening force to the second battery cell 11B in the B direction, the second battery cell 11B can be balanced, and similarly, the fourth battery cell 11d, the sixth battery cell 11f, and the eighth battery cell 11j can be balanced under the action of the first binding member 31 and the second binding member 32.

The first binding member 31 passes through between every two adjacent battery cells 11, the second binding member 32 passes through between every two adjacent battery cells 11, and the direction of tightening force applied by the first binding member 31 and the second binding member 32 to the same battery cell 11 is opposite, so that each battery cell 11 is in stress balance, and the integration level of the battery cell group 10 is improved.

Of course, in other embodiments, as shown in fig. 6, fig. 6 is a schematic structural diagram of a battery 100 according to other embodiments of the present application. One binding member may be used to bind a plurality of battery cells 11 by passing between each adjacent battery cell 11 in the forward direction and passing in the reverse direction, and one binding member may pass through the a side of the battery cell 11 and the B side of the battery cell 11, and the same binding member applies a tightening force to the same battery cell 11 in two opposite directions of the a direction and the B direction, and at this time, the first binding member 30 has only one end-to-end connection point. Whereas, in the embodiment in which the first strapping assembly 30 includes the first and second strapping members 31 and 32, the first strapping assembly 30 has two end-to-end connection points.

In some embodiments, along the first direction X, the projection of the first bundle 31 does not overlap with the projection of the second bundle 32.

The projection of the first binding member 31 does not overlap with the projection of the second binding member 32, i.e., the first binding member 31 and the second binding member 32 are disposed in a staggered manner on a plane perpendicular to the first direction X.

As shown in fig. 4, the first binding member 31 and the second binding member 32 are disposed offset from each other in the vertical direction.

The projection of the first binding member 31 and the projection of the second binding member 32 do not overlap, and thus the arrangement can reduce the possibility that the first binding member 31 interferes with the second binding member 32.

For better binding effect, the binding member usually has a certain width and hardness, if one binding member is used, the binding member needs to be inclined to avoid each other when the binding member passes through a part between adjacent battery cells 11, so that the binding member is bent, the flatness of the binding member is affected, and the insulating film on the battery cells 11 is easily damaged due to stress concentration between the bending position or edge of the binding member and the shell 113 of the battery cell 11. The first binding assembly 30 comprises the first binding member 31 and the second binding member 32 which are arranged in a staggered manner, so that the first binding member 31 and the second binding member 32 are arranged in a staggered manner, the first binding member 31 is arranged on one plane, the second binding member 32 is arranged on the other plane, the possibility that the flatness of the first binding member 31 or the second binding member 32 is affected due to the fact that the first binding member 31 and the second binding member 32 are mutually avoided is reduced, the risk of damage to an insulating film of the battery cell 11 is reduced, and the reliability of the battery 100 is improved.

Referring to fig. 5, in some embodiments, the end-to-end connection point of the first binding member 31 is located at one side of the battery cell stack 10 in the second direction Y, and the end-to-end connection point of the second binding member 32 is located at the other side of the battery cell stack 10 in the second direction Y, which is perpendicular to the first direction X.

The end-to-end connection point of the first binding member 31 means that the first binding member 31 has two free ends, one of which is a head end and the other of which is a tail end, and the first binding member 31 can tighten the plurality of battery cells 11 after being connected end-to-end, thereby assisting the battery cells 11 to be grouped. Correspondingly, the second binding member 32 also has two free ends, one of which is a head end and the other of which is a tail end, and the second binding member 32 can tighten the plurality of battery cells 11 after being connected head to tail, thereby assisting the battery cells 11 to be grouped. The battery cells 11 are grouped under the action of the first and second binding members 31 and 32.

The end-to-end connection point of the first binding member 31 is located at one side of the battery cell group 10 in the second direction Y, that is, the end-to-end connection point of the first binding member 31 and the end-to-end connection point of the second binding member 32 are located at opposite sides of the battery cell group 10, respectively, and the end-to-end connection point of the first binding member 31 and the end-to-end connection point of the second binding member 32 are not located at the same side of the battery cell group 10.

The first direction X is the direction of arranging the battery cells 11, the second direction Y is the direction perpendicular to the first direction X, the head-to-tail connection point of the first binding member 31 is located at one side of the battery cell group 10 along the second direction Y, tightening of the plurality of battery cells 11 is facilitated, the integration level of the battery 100 is improved, meanwhile, the battery cell group 10 is synchronously tightened at two sides of the battery cell group 10 by the first binding member 31 and the second binding member 32, and the head-to-tail connection work of the first binding member 31 and the head-to-tail connection work of the second binding member 32 are synchronously performed, so that the grouping efficiency of the battery 100 is improved.

In some embodiments, the first bundle 31 is heat-fused end-to-end, or the second bundle 32 is heat-fused end-to-end.

In some embodiments, the first bundle 31 is heat-staked end-to-end, and the second bundle 32 is heat-staked end-to-end.

The head-to-tail heat fusion of the first binding member 31 can improve the connection stability of the head-to-tail connection point of the first binding member 31, and the head-to-tail heat fusion of the second binding member 32 can improve the connection stability of the head-to-tail connection point of the first binding member 31.

In some embodiments, the battery cells 11 are provided with electrode terminals 114 at one end along the third direction Z, and the first binding assembly 30 binds one end of each battery cell 11 away from the electrode terminals 114, where the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

Illustratively, as shown in fig. 4, the top of the battery cells 11 is provided with an electrode terminal 114 in the vertical direction, and the first binding assembly 30 binds the bottom of each battery cell 11.

The end that the battery monomer 11 kept away from electrode terminal 114 is the one end that battery monomer 11 and the box 20 of battery 100 pass through the colloid and connect, and the first subassembly 30 that bindes the one end that every battery monomer 11 kept away from electrode terminal 114 can restrain the colloid and hold the volume that overflows between two adjacent battery monomers 11, restrains the colloid to be equipped with electrode terminal 114's direction to battery monomer 11 and creep.

In some embodiments, the battery cells 11 are provided with electrode terminals 114 at one end thereof in a third direction Z, which is perpendicular to the first direction X, and the first binding assembly 30 binds one end of each battery cell 11 remote from the electrode terminals 114.

Referring to fig. 7, fig. 7 is a schematic view of a battery 100 according to still other embodiments of the present application. In some embodiments, the battery 100 further includes a second binding assembly 40, the second binding assembly 40 being configured to bind the battery cell group 10, at least a portion of the second binding assembly 40 passing between two adjacent battery cells 11; wherein the first binding assembly 30 is spaced apart from the second binding assembly 40 in the third direction Z, and the second binding assembly 40 binds one end of each battery cell 11 near the electrode terminal 114.

The second binding assembly 40 is provided on the basis of the first binding assembly 30, so that binding stability can be improved, and stability of the battery cell pack 10 can be improved.

The function of the second binding member 32 is the same as that of the first binding member 31, and will not be described here.

With continued reference to fig. 7, in some embodiments, the second binding assembly 40 includes a third binding member 41 that passes between each adjacent two of the battery cells 11 and a fourth binding member 42 that passes between each adjacent two of the battery cells 11, the third binding member 41 and the fourth binding member 42 applying a tightening force to the same battery cell 11 in opposite directions.

That is, the third and fourth bundles 41 and 42 may be wound in the same manner as the first and second bundles 31 and 32.

The second binding assembly 40 includes the arrangement of the first binding member 31 and the second binding member 32, so that the first binding member 31 and the second binding member 32 are arranged in a staggered manner, and therefore, the third binding member 41 is arranged on one plane, the fourth binding member 42 is arranged on the other plane, the possibility that the third binding member 41 and the fourth binding member 42 influence the flatness of the third binding member 41 or the fourth binding member 42 due to mutual avoidance is reduced, the risk of damage to the insulating film of the battery cell 11 is reduced, and the reliability of the battery 100 is improved.

In some embodiments, the battery cells 11 are rectangular parallelepiped, and the first binding assembly 30 is beneficial to improve the flatness of the battery cell stack 10, especially the rectangular parallelepiped battery cell stack 10.

In some embodiments, the battery 100 further includes a case 20, the battery cell stack 10 is disposed in the case 20, and a bottom wall of the case 20 is connected to the battery cell stack 10 through a glue (not shown in the drawings).

The embodiment of the application also provides electric equipment, which comprises the battery 100 provided by any embodiment, wherein the battery 100 is used for supplying power to the electric equipment.

The embodiment of the application further provides a battery 100, where the battery 100 includes a battery cell group 10, a first binding assembly 30 and a second binding assembly 40, the battery cell group 10 includes a plurality of battery cells 11 arranged along a first direction X, the battery cells 11 are rectangular parallelepiped, and a thickness direction of the battery cells 11 is parallel to the first direction X. The battery cells 11 are provided with electrode terminals 114 at one side thereof in the third direction Z, the first binding assembly 30 is used for binding one end of each battery cell 11, which is far away from the electrode terminals 114, and the second binding assembly 40 is used for binding one end of each battery cell 11, which is provided with the electrode terminals 114. The first binding assembly 30 includes a first binding member 31 passing between each adjacent two of the battery cells 11 and a second binding member 32 passing between each adjacent two of the battery cells 11, the direction of tightening force applied to the same one of the battery cells 11 by the first binding member 31 and the second binding member 32 being opposite. The second binding assembly 40 includes a third binding member 41 passing between each adjacent two of the battery cells 11 and a fourth binding member 42 passing between each adjacent two of the battery cells 11, the direction of tightening force applied to the same one of the battery cells 11 by the third binding member 41 and the fourth binding member 42 being opposite. Along the third direction Z, the first binding member 31 is disposed offset from the second binding member 32, and the third binding member 41 is disposed offset from the fourth binding member 42. The end-to-end connection point of the first binding member 31 is located at one side of the battery cell stack 10 in the second direction Y, and the end-to-end connection point of the second binding member 32 is located at one side of the battery cell stack 10 in the second direction Y. The end-to-end connection point of the third binding member 41 is located at the same side of the battery cell stack 10 as the end-to-end connection point of the first binding member 30, and the end-to-end connection point of the fourth binding member 42 is located at the same side of the battery cell stack 10 as the end-to-end connection point of the second binding member 40.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

The above embodiments are only for illustrating the technical solution of the present application, and are not intended to limit the present application, and various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (12)

1. A battery, comprising:

a battery cell group including a plurality of battery cells arranged in a first direction,

And the first binding assembly is used for binding the battery cell groups, and at least part of the first binding assembly passes through between two adjacent battery cells.

2. The battery of claim 1, wherein the first binding assembly includes a first binding member that passes between each adjacent two of the battery cells and a second binding member that passes between each adjacent two of the battery cells, the first binding member and the second binding member applying tightening forces to the same battery cell in opposite directions.

3. The battery of claim 2, wherein a projection of the first bundle does not overlap with a projection of the second bundle along the first direction.

4. The battery of claim 3, wherein the first tie-down point is located on one side of the battery cell stack in a second direction, and the second tie-down point is located on the other side of the battery cell stack in the second direction, the second direction being perpendicular to the first direction.

5. The battery of claim 2, wherein the first binding is end-to-end hot-melt connected and/or the second binding is end-to-end hot-melt connected.

6. The battery according to claim 4, wherein an electrode terminal is provided at one end of the battery cells in a third direction, the first binding assembly binds one end of each of the battery cells away from the electrode terminal, and the first direction, the second direction, and the third direction are perpendicular to each other.

7. The battery according to claim 1, wherein an end of the battery cells in a third direction is provided with an electrode terminal, the first binding assembly binds an end of each of the battery cells away from the electrode terminal, the third direction being perpendicular to the first direction.

8. The battery of claim 7, wherein the battery further comprises:

A second binding assembly for binding the battery cell groups, at least part of the second binding assembly passing between two adjacent battery cells;

The first binding assembly and the second binding assembly are arranged at intervals along the third direction, and the second binding assembly binds one end, close to the electrode terminal, of each battery cell.

9. The battery of claim 8, wherein the second binding assembly includes a third binding member that passes between each adjacent two of the battery cells and a fourth binding member that passes between each adjacent two of the battery cells, the third binding member and the fourth binding member applying tightening forces to the same battery cell in opposite directions.

10. The battery of any one of claims 1-9, wherein the cells are rectangular parallelepiped.

11. The battery of any one of claims 1-9, wherein the battery further comprises:

The battery cell group is arranged in the box body, and the bottom wall of the box body is connected with the battery cell group through colloid.

12. A powered device comprising a battery as claimed in any one of claims 1-11.