CN217719809U - Battery and power consumption device - Google Patents

Abstract

The application discloses battery and electric device, battery include a plurality of battery monomer and packing, and a plurality of battery monomer pile up along the first direction, and the free surface of battery includes the curved surface. The filling member is at least partially filled between the curved surfaces of the adjacent battery cells and connected to the curved surfaces. The embodiment of the application can improve the yield of the battery.

Description

Battery and power consumption device

Technical Field

The present application relates to the field of batteries, and in particular, to a battery and a power consumption device.

Background

Batteries are widely used in electronic devices such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.

How to improve the yield of the battery is an important research direction in the battery technology.

SUMMERY OF THE UTILITY MODEL

The application provides a battery and power consumption device, its yields that can improve the battery.

In a first aspect, the present application provides a battery including a plurality of battery cells stacked in a first direction, an outer surface of the battery cells including a curved surface, and a filler. The filling member at least partially fills between the curved surfaces of the adjacent battery cells and is connected to the curved surfaces.

In the technical scheme, the groove structure is formed by surrounding the curved surface of the adjacent battery monomers, the filling piece is filled in the groove structure, the blocking effect on the glue for sticking the side plate and the box body can be achieved, the volume of the glue outside the groove structure is reduced, the pollution phenomenon of the glue on the battery is reduced, and the yield of the battery is improved.

In some embodiments, the outer surface of the battery cell includes two first surfaces oppositely disposed in a first direction and two second surfaces oppositely disposed in a second direction, the first direction being perpendicular to the second direction; the curved surface comprises a first curved surface, and the first surface is connected to the second surface through the first curved surface.

In the technical scheme, the first surface is perpendicular to the second surface, and the first curved surface is connected between the first surface and the second surface, so that the first curved surface plays a role in smooth transition on the first surface and the second surface, and the safety of the battery monomer is improved. And a groove structure is formed between the first curved surfaces of the adjacent single batteries, when the side plates are bonded, glue easily overflows from the groove structure, and the filling piece is filled in the groove structure, so that the volume of the glue overflowing out of the groove structure can be reduced.

In some embodiments, first receiving grooves are formed between the first curved surfaces of the adjacent battery cells, the filling members are filled at two opposite ends of the first receiving grooves in a third direction, and the third direction, the first direction and the second direction are perpendicular to each other.

In above-mentioned technical scheme, fill in the filler in first holding tank at the relative both ends of third direction Z, can form to glue and block the effect, can block that at least part glue overflows to the relative both ends of battery monomer on third direction Z from the middle zone of first holding tank, improve the pollution problem of battery, satisfy the size and the plane degree requirement of battery, improve the yields of battery.

In some embodiments, a first accommodating groove is formed between the first curved surfaces of the adjacent battery cells, and the filling member is filled in at least a part of the bottom of the first accommodating groove.

In the technical scheme, the filling piece is filled at least partial bottom of the first accommodating groove, and the filling piece can form a blocking effect on the glue entering the first surface from the bottom of the first accommodating groove, so that the glue overflowing phenomenon of the glue is reduced, and the water jumping problem of the battery monomer is improved.

In some embodiments, the outer surface of the filler element is flush with the second surface.

In above-mentioned technical scheme, set up the position department of filling member in first holding tank, the filling member can play the effect that stops almost completely to glue, avoids the glue overflow of this department to glue the first surface by a wide margin even, improves the diving problem of battery.

In some embodiments, the outer surface of the battery cell further comprises a top surface and a bottom surface oppositely arranged along a third direction, and the third direction, the first direction and the second direction are perpendicular to each other; the curved surface further comprises a second curved surface, and the first surface is connected to the bottom surface through the second curved surface.

In the technical scheme, the first surface is vertical to the bottom surface, and the second curved surface is connected between the first surface and the bottom surface, so that the second curved surface plays a role in smooth transition on the first surface and the bottom surface, and the safety of the battery monomer is improved. And a groove structure is formed between the second curved surfaces of the adjacent single batteries, when the box body is bonded, glue easily overflows from the groove structure, and the filling piece is filled in the groove structure, so that the volume of the glue overflowing out of the groove structure can be reduced.

In some embodiments, a second accommodating groove is formed between the second curved surfaces of the adjacent battery cells, and the filling member is filled at two opposite ends of the second accommodating groove in the second direction.

In the technical scheme, the filling piece is filled at the two opposite ends of the second accommodating groove in the second direction Y, so that at least part of glue can be prevented from overflowing from the middle area of the second accommodating groove to the two opposite ends of the battery monomer in the second direction Y, the pollution problem of the battery is improved, and the yield of the battery is improved.

In some embodiments, a second accommodating groove is formed between the second curved surfaces of the adjacent battery cells, and the filling member is filled in at least a part of the bottom of the second accommodating groove.

In above-mentioned technical scheme, fill the filling member in the at least partial bottom of second holding tank, the filling member can form the effect of blockking to the glue that overflows to the first surface from the bottom of second holding tank to alleviate the excessive gluey phenomenon of glue, improve the free diving problem of battery.

In some embodiments, the filling member is level with the bottom surface.

In the technical scheme, the filling piece is arranged at the position of the filling piece in the second accommodating groove, the filling piece can almost completely block the glue, the glue at the position is greatly prevented from overflowing to the first surface, and the water jumping problem of the battery is improved.

In some embodiments, the battery further comprises a heat insulation piece, wherein the heat insulation piece is arranged between two adjacent battery cells; the first curved surface is an arc surface, the radius of the first curved surface is 1, the size of the heat insulation piece along the first direction is a, the distance between the heat insulation piece and the plane where the second surface is located is a, the length of the first curved surface along the third direction is 1, and the first direction, the second direction and the third direction are perpendicular to each other; form first holding tank between the free first curved surface of adjacent battery, the volume that the filler was filled in first holding tank is V1, a and satisfies: 0.8[ (1 ^2- × 1^ 2/4) × 2+ a × ] ≦ V1 ≦ 1 [ (1 ^2- × 1^ 2/4) × 2+ a × ] ^ 1.

In the technical scheme, the volume of the filling piece filled in the first accommodating groove is set to be 0.8[ (1-multiplied by 1^ 2/4) × 2+ aX ] } 1 to [ (1 ^ 2-multiplied by 1^ 2/4) × 2+ aX ] } 1, so that the bonding effect of the side plate can be ensured, the glue overflow amount can be greatly reduced, and the water jump problem of a battery monomer can be improved.

In some embodiments, the battery further comprises a heat insulation member, wherein the heat insulation member is arranged between two adjacent battery cells; the second curved surface is the arc surface, and the radius is 2, and the size of heat insulating part along the first direction does, and the heat insulating part is c with the planar interval in bottom surface place, and the length of second direction is 2 along the second curved surface, forms the second holding tank between the free second curved surface of adjacent battery, and the filling is filled in the volume of second holding tank and is V2, c and satisfy: 0.8[ (2 ^2- × 2^ 2/4) × 2+ c × ] ^2 ≦ V2 ≦ [ (2 ^2- × 2^ 2/4) × 2+ c × ] ^ 2.

In the technical scheme, the volume of the filling piece filled in the second accommodating groove is set to be 0.8[ (2 ^ 2-x 2^ 2/4) × 2+ cX ] 2 to [ (2 ^ 2-x 2^ 2/4) × 2+ cX ] 2, so that the adhesive effect of the box body can be ensured, the glue overflow amount can be greatly reduced, and the water jump problem of a battery monomer can be improved.

In some embodiments, the filler is a curable liquid filler.

In the technical scheme, the liquid filler is used for filling, and compared with the solid filler, the liquid filler is not required to be specially customized according to the size, can be flexibly filled according to the requirement, and is convenient to use. Moreover, the liquid filler has better sealing property after being filled and cured, and has obvious blocking effect on glue.

In a second aspect, the present application provides an electrical device, comprising a battery according to any of the embodiments of the first aspect, the battery being configured to provide electrical energy.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a power consuming device according to some embodiments of the present application;

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

fig. 3 is a schematic structural diagram of a battery provided in some embodiments of the present application;

fig. 4 is a partial schematic view of a battery according to some embodiments of the present disclosure;

fig. 5 is a schematic view of another partial structure of a battery according to some embodiments of the present disclosure;

fig. 6 is a schematic structural diagram of a battery provided in some embodiments of the present application during a manufacturing process of a filling member;

FIG. 7 isbase:Sub>A partial cross-sectional view of FIG. 5 at A-A;

fig. 8 is a partial cross-sectional view of fig. 3 at C-C.

The reference numerals for the specific embodiments are as follows:

1. a vehicle; 2. a battery; 3. a controller; 4. a motor; 5. a box body; 5a, a first tank portion; 5b, a second tank portion; 5c, an accommodating space; 6. a battery cell; 61. a curved surface; 611. a first curved surface; 612. a second curved surface; 62. a first surface; 63. a second surface; 64. a top surface; 65. a bottom surface; 7. a filling member; 81. a first accommodating groove; 82. a second accommodating groove; 9. a thermal insulation member; 10. glue; 11. a side plate; 12. an end plate;

x, a first direction; y, a second direction; z, third direction.

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 and completely 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 obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to 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 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: a exists alone, A and B exist simultaneously, and B exists alone. 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 cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application.

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 one or more 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 pole piece, a negative pole 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 pole mass flow body includes anodal coating district and connects in anodal utmost point ear in anodal coating district, and anodal coating district has anodal active substance layer, and anodal utmost point ear does not coat anodal active substance layer. Taking a lithium ion battery monomer 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 coating area and a negative electrode lug connected to the negative coating area, the negative coating area 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 having a receiving groove formed therein for receiving the electrode assembly. The case may protect the electrode assembly from the outside to prevent foreign substances from outside from affecting the charge or discharge of the electrode assembly.

The shape of the battery cell is diversified, and the battery cell generally includes a curved surface, such as a cylindrical battery cell, a square battery cell, and the like. The square battery cell is generally provided with a curved surface between two mutually perpendicular surfaces, so that safety risks caused by right angles are avoided.

When a plurality of battery cells are assembled into a battery, the plurality of battery cells need to be fixed by matching corresponding side plates on the side surfaces of the plurality of battery cells, and the side plates are generally adhered to the side surfaces of the battery cells by glue. The inventors have found that during the bonding process, the glue used tends to overflow between the side plates and the curved surfaces of two adjacent cells. For example, in a square battery cell, glue easily overflows from between the side plate and the curved surface of two adjacent square battery cells, and the overflowing glue can contaminate the battery cell and parts outside the battery cell, which affects the yield of the battery.

Based on the above considerations, the inventors have conducted extensive studies and designed a battery in which a filling member is disposed between the curved surfaces of the adjacent battery cells and connected to the curved surfaces, so that the filling member can block the glue. Illustratively, the filling member can prevent glue from overflowing to the top and the bottom of the battery cell or the opposite surface of the adjacent battery cell, so that the yield of the battery is improved.

The battery cell described in the embodiment of the present application is suitable for a battery and an electric device using the battery cell.

The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool 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 extending 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 tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and electric 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 power utilization device.

For convenience of explanation, the following embodiments will be described with an electric device as an example of a vehicle. The battery of the present application is described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an electrical device according to some embodiments of the present disclosure.

As shown in fig. 1, a battery 2 is provided inside a vehicle 1, and the battery 2 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, and for example, the battery 2 may serve as an operation power source of the vehicle 1.

The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being adapted to control the battery 2 to power the motor 4, e.g. for start-up, navigation and operational power demands while driving of the vehicle 1.

In some embodiments of the present application, the battery 2 may be used not only as an operating power source of the vehicle 1, but also as a driving power source of the vehicle 1, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1.

Fig. 2 is an exploded schematic view of a battery provided in some embodiments of the present application.

As shown in fig. 2, the battery 2 includes a case 5 and a battery cell 6, and the battery cell 6 is accommodated in the case 5.

The case 5 is used for accommodating the battery cells 6, and the case 5 may have various structures. In some embodiments, the case 5 may include a first case portion 5a and a second case portion 5b, the first case portion 5a and the second case portion 5b cover each other, and the first case portion 5a and the second case portion 5b together define a receiving space 5c for receiving the battery cell 6. The second casing part 5b may be a hollow structure with one open end, the first casing part 5a is a plate-shaped structure, and the first casing part 5a covers the open side of the second casing part 5b to form a casing 5 with a containing space 5 c; the first casing portion 5a and the second casing portion 5b may be hollow structures each having one side opened, and the opening side of the first casing portion 5a may be covered with the opening side of the second casing portion 5b to form the casing 5 having the accommodating space 5c. Of course, the first casing portion 5a and the second casing portion 5b may be various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In order to improve the sealing property after the first casing portion 5a and the second casing portion 5b are connected, a sealing member, such as a sealant or a gasket, may be provided between the first casing portion 5a and the second casing portion 5 b.

Assuming that the first box portion 5a covers the top of the second box portion 5b, the first box portion 5a may also be referred to as an upper box cover, and the second box portion 5b may also be referred to as a lower box cover.

In the battery 2, one or more battery cells 6 may be provided. If there are a plurality of battery cells 6, the plurality of battery cells 6 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to that the plurality of battery cells 6 are connected in series or in parallel. The plurality of battery monomers 6 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 6 is accommodated in the box body 5; of course, a plurality of battery cells 6 may be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a whole and accommodated in the box 5.

Fig. 3 is a schematic structural diagram of a battery according to some embodiments of the present disclosure.

As shown in fig. 3, the battery 2 according to the embodiment of the present disclosure includes a plurality of battery cells 6, two end plates 12, and two side plates 11, where the two end plates 12 are located at two ends of the plurality of battery cells 6, the two side plates 11 are located at two sides of the plurality of battery cells 6, and the two end plates 12 and the two side plates 11 are connected to form a frame structure to fix the plurality of battery cells 6.

In some embodiments, the plurality of battery cells 6 may be electrically connected by a bus member to realize parallel connection, series connection or parallel-series connection of the plurality of battery cells 6.

In some embodiments, a side plate 11 is attached to each battery cell 6, and a glue 10 is applied to a central region of the side plate 11.

In some embodiments, the second case portion 5b of the case 5 is bonded to the bottom of each battery cell 6.

Fig. 4 is a partial structural view of a battery according to some embodiments of the present disclosure, fig. 5 is another partial structural view of a battery according to some embodiments of the present disclosure, and fig. 6 is a structural view of a battery according to some embodiments of the present disclosure during a manufacturing process of the battery, in which a filling member is filled.

As shown in fig. 4 to 6, the battery 2 of the embodiment of the present application includes a plurality of battery cells 6 and a filling member 7, the plurality of battery cells 6 are stacked in a first direction X, and an outer surface of the battery cell 6 includes a curved surface 61. The filling member 7 at least partially fills between the curved surfaces 61 of the adjacent battery cells 6 and is connected to the curved surfaces 61.

The shape of the curved surface 61 is not limited in the embodiment of the present application, and for example, the cross-sectional shape of the curved surface 61 may be a circular arc shape or a parabolic shape.

The filling position of the filling member 7 is not limited in the embodiment of the present application, and the filling member may be filled at both ends of the curved surface 61 of the adjacent battery cell 6, or may be disposed along the entire curved surface 61, or a plurality of filling members 7 may be disposed on the curved surface 61 at intervals.

The material of the filling member 7 is not limited in the embodiment of the present application, and the filling member may be a solid material or a liquid filling material that can be rapidly cured. The filling member 7 is, for example, a moisture-curable reactive polyurethane hot melt adhesive.

The filler piece 7 may be in direct contact with the curved surface 61 or may be indirectly connected to the curved surface 61 by other means.

The curved surface 61 of adjacent battery monomer 6 encloses to establish and forms the groove structure, and filler 7 fills in the groove structure, can play the effect of blockking to glue 10 of pasting curb plate 11 and box 5, and then reduces glue 10 and spills over the volume outside the groove structure, alleviates glue 10 and to the pollution phenomenon of battery 2, has improved the yields of battery 2.

When the battery unit 6 has a plurality of curved surfaces 61, a plurality of pairs of adjacent curved surfaces in adjacent battery units 6 are surrounded to form a plurality of groove structures, and the filling member 7 is filled in at least one of the groove structures.

In some embodiments, the outer surface of the battery cell 6 includes two first surfaces 62 oppositely disposed along a first direction X and two second surfaces 63 oppositely disposed along a second direction Y, the first direction X being perpendicular to the second direction Y; curved surface 61 includes a first curved surface 611, and first surface 62 is connected to second surface 63 by first curved surface 611.

Optionally, the battery cells 6 are square batteries.

The first surface 62 is perpendicular to the second surface 63, and the first curved surface 611 is connected between the first surface 62 and the second surface 63, so that the first curved surface 611 has a smooth transition effect on the first surface 62 and the second surface 63, and the safety of the battery cell 6 is improved. Furthermore, a groove structure is formed between the first curved surfaces 611 of the adjacent battery cells 6, so that the glue 10 easily overflows from the groove structure when the side plates 11 are bonded, and the volume of the glue overflowing to the outside of the groove structure can be reduced by filling the filling material 7 in the groove structure.

In some embodiments, the first accommodating grooves 81 are formed between the first curved surfaces 611 of the adjacent battery cells 6, and the filling members 7 are filled at two opposite ends of the first accommodating grooves 81 in the third direction Z, where the third direction Z, the first direction X and the second direction Y are perpendicular to each other.

The filling volume of the filling member 7 is not limited in the embodiment of the present application, and when the filling member is filled at both ends, the filling member can be filled in the end portion of the first accommodating groove 81, or can be partially filled in the end portion of the first accommodating groove 81. When the filling material is partially filled in the end portion of the first receiving groove 81, the filling material 7 is filled in the bottom portion of the first receiving groove 81. This is provided to prevent the glue 10 from overflowing from the bottom of the first receiving groove 81.

In the embodiment of the present application, the filling members 7 are filled in the two opposite ends of the first accommodating groove 81 in the third direction Z, and the filled volumes at the two ends may be equal or different.

The glue 10 flowing to the top of the battery cell 6 causes the problem of poor welding quality or super high height of the battery 2, and the glue 10 flowing to the bottom of the battery cell 6 causes the problem of poor heat conduction effect or poor bottom flatness of the battery 2. In view of this, the inventor fills the filling members 7 in the two opposite ends of the first receiving groove 81 in the third direction Z, so as to form a blocking effect on the glue 10, and block at least a portion of the glue 10 from overflowing from the middle area of the first receiving groove 81 to the two opposite ends of the battery cell 6 in the third direction Z, that is, the top and the bottom of the battery cell 6 in fig. 4, thereby improving the pollution problem of the battery 2, meeting the requirements on the size and the flatness of the battery 2, and improving the yield of the battery 2.

In some embodiments, the first receiving groove 81 is formed between the first curved surfaces 611 of the adjacent battery cells 6, and the filling member 7 is filled in at least a part of the bottom of the first receiving groove 81.

The inventor finds that after the glue 10 overflows from the bottom of the first accommodating groove 81 to the first surface 62 and is solidified, a hard block is formed on the first surface 62, the battery cell 6 expands during charge and discharge cycles, the existence of the hard block can form a force effect on the expanded battery cell 6, and the existence of stress can cause the water jump problem of the battery cell 6.

In view of this, the inventor fills the filling member 7 in at least a part of the bottom of the first receiving groove 81, and the filling member 7 can block the glue 10 entering the first surface 62 from the bottom of the first receiving groove 81, so as to reduce the glue overflow phenomenon of the glue 10 and improve the water jump problem of the battery cell 6.

In some embodiments, the outer surface of the filler element 7 is level with the second surface 63.

The outer surface of the filling member 7 is flush with the second surface 63 in the embodiment of the present application, which means that the outer surface of the filling member 7 is located on the same plane as the second surface 63.

The outer surface of the filling member 7 is flush with the second surface 63, so that the filling member 7 can almost completely block the glue 10 at the position where the filling member 7 is disposed in the first receiving groove 81, thereby greatly preventing the glue 10 from overflowing to the first surface 62, and improving the water jump problem of the battery 2.

When the filling members 7 are filled in the two opposite ends of the first accommodating groove 81 in the third direction Z, the filling members 7 almost completely block the glue 10 that is about to overflow to the top or the bottom of the single battery 6 along the first accommodating groove 81, so as to significantly improve the glue overflow phenomenon and improve the yield of the battery 2.

Further alternatively, the filling member 7 is filled in the first receiving groove 81.

In some embodiments, the outer surface of the battery cell 6 further includes a top surface 64 and a bottom surface 65 oppositely disposed along a third direction Z, the first direction X, and the second direction Y being perpendicular to each other. The curved surface 61 further includes a second curved surface 612, and the first surface 62 is connected to the bottom surface 65 by the second curved surface 612.

Optionally, the battery cells 6 are square batteries.

The first surface 62 is perpendicular to the bottom surface 65, and the second curved surface 612 is connected between the first surface 62 and the bottom surface 65, so that the second curved surface 612 performs a smooth transition function on the first surface 62 and the bottom surface 65, and the safety of the battery cell 6 is improved. Moreover, since the groove structure is formed between the second curved surfaces 612 of the adjacent battery cells 6, the glue 10 is easily overflowed from the groove structure when the case 5 is bonded, and the filler 7 is filled in the groove structure, thereby reducing the volume of the glue which overflows to the outside of the groove structure.

In some embodiments, the second receiving grooves 82 are formed between the second curved surfaces 612 of the adjacent battery cells 6, and the filling members 7 are filled at two opposite ends of the second receiving grooves 82 in the second direction Y.

The embodiment of the present application does not limit the filling volume of the filling member 7, and when the filling member is filled at both ends, the filling member can be filled in the end portion of the second receiving groove 82, or partially filled in the end portion of the second receiving groove 82. When the filling member is partially filled in the end portion of the second receiving groove 82, the filling member 7 is filled in the bottom portion of the second receiving groove 82. This is provided to prevent the glue 10 from overflowing from the bottom of the second receiving groove 82.

The filling members 7 in the embodiment of the present application are filled at two opposite ends of the second receiving groove 82 in the second direction Y, and the filled volumes at the two ends may be equal or different.

The filling members 7 are filled at two opposite ends of the second accommodating groove 82 in the second direction Y, so that at least part of the glue 10 can be prevented from overflowing from the middle area of the second accommodating groove 82 to two opposite ends of the single battery 6 in the second direction Y, the pollution problem of the battery 2 is improved, and the yield of the battery 2 is improved.

In some embodiments, the second receiving grooves 82 are formed between the second curved surfaces 612 of the adjacent battery cells 6, and the filling member 7 is filled in at least a part of bottoms of the second receiving grooves 82.

Alternatively, the area and shape of the cross section of the filler 7 perpendicular to the second direction Y are the same everywhere.

The inventor finds that after the glue 10 overflows from the bottom of the second accommodating groove 82 to the first surface 62 and is solidified, a hard block is formed on the first surface 62, the battery cell 6 expands during charge and discharge cycles, the existence of the hard block can form a force effect on the expanded battery cell 6, and the existence of stress can cause the water jump problem of the battery cell 6.

In view of this, the inventor fills the filling member 7 in at least a part of the bottom of the second receiving groove 82, and the filling member 7 can form a blocking effect on the glue 10 overflowing from the bottom of the second receiving groove 82 to the first surface 62, so as to reduce the glue overflow phenomenon of the glue 10 and improve the water jump problem of the battery cell 6.

In some embodiments, the filling member 7 is level with the bottom surface 65.

The outer surface of the filling member 7 is flush with the bottom surface 65 in the embodiment of the present application, which means that the outer surface of the filling member 7 and the bottom surface 65 are located on the same plane.

The outer surface of the filling member 7 is flush with the bottom surface 65, so that the filling member 7 can almost completely block the glue 10 at the position where the filling member 7 is disposed in the second receiving groove 82, thereby greatly preventing the glue 10 from overflowing to the first surface 62, and improving the water jump problem of the battery 2.

When the filling member 7 is filled in the two opposite ends of the second receiving groove 82 in the second direction Y, the filling member 7 almost completely blocks the glue 10 that is about to overflow to the outside of the second receiving groove 82 along the second direction Y, so as to significantly improve the glue overflow phenomenon.

Further alternatively, the filling member 7 fills the second receiving groove 82.

Fig. 7 isbase:Sub>A partial cross-sectional view atbase:Sub>A-base:Sub>A of fig. 5, and fig. 8 isbase:Sub>A partial cross-sectional view at C-C of fig. 3.

Referring to fig. 7 and 8, in some embodiments, the battery 2 further includes a heat insulation member 9, and the heat insulation member 9 is disposed between two adjacent battery cells 6. The first curved surface 611 is an arc surface, the radius of the first curved surface is 1, the size of the heat insulation piece 9 along the first direction X is a, the distance between the heat insulation piece 9 and the plane where the second surface 63 is located is a, the length of the first curved surface 611 along the third direction Z is 1, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. First accommodating grooves 81 are formed between the first curved surfaces 611 of the adjacent battery cells 6, and the volume of the filling member 7 filled in the first accommodating grooves 81 is V1, a, and satisfies: 0.8[ (1- × 1^ 2/4) × 2+ a × ] × 1 is less than or equal to V1 and less than or equal to [ (1 ^2- × 1^ 2/4) × 2+ a × ] ×.1. Wherein a is more than or equal to 0.

The heat insulation piece 9 is arranged between the two adjacent single batteries 6, and the heat insulation piece 9 can reduce the heat transfer between the two adjacent single batteries 6, reduce the mutual influence of the heat generated by the two adjacent single batteries 6 and maintain the normal cycle performance of the single batteries 6.

The specific shape of the heat insulation member 9 is not limited in the embodiments of the present application, and may be a plate shape, a block shape, or another shape.

The dimension of the heat insulator 9 in the first direction X in the embodiment of the present application is the dimension of the heat insulator 9 in the first direction X after being assembled in the battery 2.

The filling member 7 is filled in the first receiving groove 81, and if the filling amount is too large, the filling member 7 protrudes from the first receiving groove 81, so that the side plate 11 is not firmly adhered to the second surface 63 due to uneven surface during adhesion. If the filling amount is too small, a large amount of glue 10 may overflow from the first receiving groove 81 to the first surface 62, causing a problem of water jumping of the battery cell 6. In view of this, the inventor sets the volume of the first accommodating groove 81 filled with the filling member 7 to be 0.8[ (1- × 1^ 2/4) × 2+ a × ] × 1 to [ (1 ^2- × 1^ 2/4) × 2+ a × ] 1, which can not only ensure the bonding effect of the side plate 11, but also greatly reduce the glue overflow amount and improve the water jump problem of the battery cell 6.

In some embodiments, the battery 2 further includes a thermal insulator 9, and the thermal insulator 9 is disposed between two adjacent battery cells 6. Second curved surface 612 is the arc surface, and the radius is 2, and the size of heat insulating part 9 along first direction X does, and the interval that heat insulating part 9 and bottom surface 65 place the plane is c, and the length of second curved surface 612 along second direction Y is 2, forms second holding tank 82 between the second curved surface 612 of adjacent battery monomer 6, and the volume that filler 7 filled in second holding tank 82 is V2, c and satisfy: 0.8[ (2 ^2- × 2^ 2/4) × 2+ c × ] ^2 ≦ V2 ≦ [ (2 ^2- × 2^ 2/4) × 2+ c × ] ^ 2. Wherein c is more than or equal to 0.

If the filling amount of the filling member 7 filled in the second receiving groove 82 is too large, the filling member 7 protrudes from the second receiving groove 82, so that the surface of the box 5 is uneven during the bonding process, and the bonding with the bottom surface 65 is not firm. If the filling amount is too small, a large amount of glue 10 may overflow from the second accommodating groove 82 to the first surface 62, causing a significant problem of water jumping of the battery cell 6. In view of this, the volume of the second accommodation groove 82 filled with the filling element 7 is set to be 0.8[ (2 ^ 2-x 2^ 2/4) × 2+ cX ] } 2 to [ (2 ^ 2-x 2^ 2/4) × 2+ cX ] } 2, so that the adhesive effect of the box body 5 can be ensured, the glue overflow amount can be greatly reduced, and the water jump problem of the battery monomer 6 can be improved.

In some embodiments, the filler 7 is a curable liquid filler.

Adopt liquid filler to fill, for solid filler, need not to customize according to the size specially, can fill according to the demand is nimble, and it is comparatively convenient to use. Moreover, the liquid filler has better sealing property after filling and curing, and has obvious blocking effect on the glue 10.

The embodiment of the present application does not limit the specific material of the filling member 7, and for example, the filling member 7 is a moisture curing reaction type polyurethane hot melt adhesive.

The embodiment of the present application further provides an electric device, which includes the above battery 2, and the battery 2 is used for providing electric energy.

According to some embodiments of the present disclosure, referring to fig. 4 to 6, a battery 2 provided herein includes a plurality of battery cells 6 and a filling member 7, the plurality of battery cells 6 are stacked along a first direction X, and an outer surface of the battery cell 6 includes a curved surface 61. The filling member 7 at least partially fills between the curved surfaces 61 of the adjacent battery cells 6 and is connected to the curved surfaces 61. The outer surface of the battery cell 6 includes two first surfaces 62 oppositely disposed in the first direction X and two second surfaces 63 oppositely disposed in the second direction Y, the first direction X being perpendicular to the second direction Y; the curved surface 61 includes a first curved surface 611, and the first surface 62 is connected to the second surface 63 by the first curved surface 611. First accommodating grooves 81 are formed between the first curved surfaces 611 of the adjacent battery cells 6, the filling members 7 are filled in at least partial bottoms of the first accommodating grooves 81, and the third direction Z, the first direction X and the second direction Y are perpendicular to each other.

The outer surface of the battery cell 6 further includes a top surface 64 and a bottom surface 65 oppositely disposed along a third direction Z, the first direction X and the second direction Y being perpendicular to each other. The curved surface 61 further includes a second curved surface 612, and the first surface 62 is connected to the bottom surface 65 by the second curved surface 612. The second accommodating grooves 82 are formed between the second curved surfaces 612 of the adjacent battery cells 6, and the filling members 7 are filled in at least partial bottoms of the second accommodating grooves 82.

The filling member 7 is a hot melt adhesive, and when filling, firstly, a desktop three-axis CCD recognition system is adopted to perform positioning recognition on the first accommodating groove 81 and the second accommodating groove 82. Then, the corresponding volume of the filling member 7 is uniformly applied to the first receiving groove 81 and the second receiving groove 82 using a pneumatic precision hot melt adhesive valve.

While the present application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and in particular, features shown in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but rather to cover all embodiments falling within the scope of the appended claims.

Claims (13)

1. A battery, comprising:

a plurality of battery cells stacked in a first direction, an outer surface of the battery cells including a curved surface; and

and the filling member is at least partially filled between the curved surfaces of the adjacent battery cells and connected to the curved surfaces.

2. The battery of claim 1, wherein the outer surfaces of the battery cells comprise two first surfaces disposed opposite each other in the first direction and two second surfaces disposed opposite each other in a second direction, the first direction being perpendicular to the second direction;

the curved surface comprises a first curved surface, and the first surface is connected to the second surface through the first curved surface.

3. The battery as claimed in claim 2, wherein a first receiving groove is formed between the first curved surfaces of the adjacent battery cells, and the filling member is filled at two opposite ends of the first receiving groove in a third direction, wherein the third direction, the first direction and the second direction are perpendicular to each other.

4. The battery of claim 2, wherein a first receiving groove is formed between the first curved surfaces of the adjacent battery cells, and the filling member is filled in at least a part of the bottom of the first receiving groove.

5. The cell defined in any one of claims 2-4, wherein the outer surface of the filler is flush with the second surface.

6. The battery of claim 2, wherein the outer surface of the battery cell further comprises a top surface and a bottom surface disposed opposite each other along a third direction, the first direction, and the second direction being perpendicular in pairs;

the curved surface further comprises a second curved surface, and the first surface is connected to the bottom surface through the second curved surface.

7. The battery according to claim 6, wherein a second receiving groove is formed between the second curved surfaces of the adjacent battery cells, and the filling member is filled at two opposite ends of the second receiving groove in the second direction.

8. The battery as claimed in claim 6, wherein a second receiving groove is formed between the second curved surfaces of the adjacent battery cells, and the filling member is filled in at least a part of a bottom of the second receiving groove.

9. The cell defined in any one of claims 6-8, wherein the filler is flush with the bottom surface.

10. The battery according to claim 2,

the battery pack further comprises a heat insulation piece, wherein the heat insulation piece is arranged between two adjacent battery monomers;

the first curved surface is an arc surface, the radius of the first curved surface is 1, the size of the heat insulation piece along a first direction is a, the distance between the heat insulation piece and the plane where the second surface is located is a, the length of the first curved surface along a third direction is 1, and the first direction, the second direction and the third direction are perpendicular to each other; form first holding tank between the first curved surface of adjacent battery monomer, the filler fill in the volume of first holding tank is V1, a and satisfies:

0.8[(𝑟1^2−𝜋×𝑟1^2/4)×2+a×𝑏]*𝐵1≤V1≤[(𝑟1^2−𝜋×𝑟1^2/4)×2+a×𝑏]*𝐵1。

11. the battery according to claim 6,

the battery pack further comprises a heat insulation piece, wherein the heat insulation piece is arranged between two adjacent battery monomers;

the second curved surface is the arc surface, and the radius is 2, the size of heat insulating part along first direction does, the heat insulating part with the planar interval in bottom surface place is c, the second curved surface is followed the length of second direction is 2, and is adjacent the battery is free form the second holding tank between the second curved surface, the filling member fill in the volume of second holding tank is V2, c and satisfies:

0.8[(𝑟2^2−𝜋×𝑟2^2/4)×2+c×𝑏]*𝐵2≤V2≤[(𝑟2^2−𝜋×𝑟2^2/4)×2+c×𝑏]*𝐵2。

12. the cell defined in claim 1, wherein the filler is a curable liquid filler.

13. An electrical device comprising a battery according to any of claims 1 to 12 for providing electrical energy.

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