CN219591517U

CN219591517U - Battery and electric equipment

Info

Publication number: CN219591517U
Application number: CN202321307068.5U
Authority: CN
Inventors: 淡江雷; 唐代春; 杜鑫鑫; 邹钺
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-08-25
Anticipated expiration: 2033-05-26

Abstract

The application discloses a battery and electric equipment, wherein a battery assembly comprises at least two battery monomers, a heat conducting piece and at least one partition piece, the partition piece is arranged between two adjacent battery monomers, the partition piece comprises a heat insulation layer, a first heat conducting layer and a second heat conducting layer, the first heat conducting layer is in heat conducting connection with one of the two adjacent battery monomers, the second heat conducting layer is in heat conducting connection with the other of the two adjacent battery monomers, the heat insulation layer is arranged between the first heat conducting layer and the second heat conducting layer and is connected with the first heat conducting layer and the second heat conducting layer, the battery monomers comprise a plurality of surfaces, the surfaces comprise first surfaces with the largest area, heat insulation surfaces are respectively arranged on the opposite sides of the heat insulation layer, the heat insulation surfaces are opposite to the first surfaces of the adjacent battery monomers, the area ratio of the heat insulation surfaces to the first surfaces is 0.7-1.2, and the heat insulation surfaces are in heat conducting connection with each partition piece. The heat insulating layer blocks heat of two adjacent battery monomers, and heat spreading is reduced.

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

This section provides merely background information related to the present disclosure and is not necessarily prior art.

With the development of new energy, more and more fields adopt new energy as power. The battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like.

In the prior art, a battery generally comprises a plurality of battery cells, and when one battery cell is out of control, the situation that heat is easy to spread among the plurality of battery cells reduces the safety of the battery.

Disclosure of Invention

In view of the above, the present utility model provides a battery that solves the problem of deterioration in safety of the battery due to occurrence of thermal runaway between a plurality of battery cells.

A first aspect of the present utility model proposes a battery comprising:

a battery assembly including at least two battery cells;

the battery pack comprises at least one separator, each separator is arranged between two adjacent battery cells, the separator comprises a heat insulation layer, a first heat conduction layer and a second heat conduction layer, the first heat conduction layer is in heat conduction connection with one of the two adjacent battery cells, the second heat conduction layer is in heat conduction connection with the other of the two adjacent battery cells, the heat insulation layer is arranged between the first heat conduction layer and the second heat conduction layer and is connected with the first heat conduction layer and the second heat conduction layer, the battery cells comprise a plurality of surfaces, the surfaces comprise first surfaces with the largest area, heat insulation surfaces are respectively arranged on two opposite sides of the heat insulation layer, the heat insulation surfaces are opposite to the first surfaces of the adjacent battery cells, and the area ratio of the heat insulation surfaces to the first surfaces is in the range of 0.7-1.2;

And the heat conducting pieces are in heat conducting connection with each partition piece.

According to the battery, the partition piece is arranged between the two adjacent battery monomers, and the two adjacent battery monomers are respectively connected with the heat conduction piece in a heat conduction way by the first heat conduction layer and the second heat conduction layer, so that heat in the use process of the battery monomers can be transferred to the heat conduction piece, and the battery monomers can be operated at safe and stable temperature. Through setting up the insulating layer between first heat-conducting layer and second heat-conducting layer, when a battery monomer takes place thermal runaway, its thermal runaway's heat is blocked by the insulating layer, has reduced the possibility to adjacent battery monomer transfer heat to the condition that takes place thermal spread between the battery monomer has been reduced, has made the security of battery improved effectively.

In addition, through setting for the area ratio of insulating layer and first surface to can make the insulating layer fully cover the region of first surface, can further improve the separation effect to the heat of battery monomer, make the heat spread problem of battery monomer spare obtain further reduction, also further promoted the security of battery.

In some embodiments of the application, the area ratio of the insulating surface to the first surface ranges from 0.8 to 1. Through further setting of the area ratio of the heat insulation layer to the first surface, the covering capacity of the heat insulation layer to the first surface is further increased, so that the blocking effect on the heat of the battery monomer is further improved, the heat spreading problem of the battery monomer piece is further reduced, and the safety of the battery is further improved.

In some embodiments of the present application, the first heat conducting layer has a first heat conducting surface, the first heat conducting surface is in heat conducting connection with the first surface of the battery cell adjacently disposed, and an area ratio of the first heat conducting surface to the first surface ranges from 0.5 to 1.2. The area ratio of the first heat conduction layer to the first surface is set, so that the contact area between the first heat conduction layer and the first surface can be increased, the heat exchange capacity of the first heat conduction layer to the battery monomer can be improved, the possibility of thermal runaway of the battery monomer is further reduced, and the safety of the battery is further improved.

In some embodiments of the present application, the second heat conducting layer has a second heat conducting surface, the second heat conducting surface is in heat conducting connection with the first surface of the battery cell adjacently disposed, and an area ratio of the second heat conducting surface to the first surface ranges from 0.5 to 1.2. The area ratio of the second heat conduction layer to the first surface is set, so that the contact area between the second heat conduction layer and the first surface can be increased, the heat exchange capacity of the second heat conduction layer to the battery monomer can be improved, the possibility of thermal runaway of the battery monomer is further reduced, and the safety of the battery is further improved.

In some embodiments of the application, the area ratio of the first thermally conductive surface to the first surface ranges from 0.8 to 1;

and/or the area ratio of the second heat conducting surface to the first surface is in the range of 0.8-1.

By further setting the area ratio of the first heat conduction layer to the first surface, the contact area between the first heat conduction layer and the first surface is further increased, the heat exchange capacity of the first heat conduction layer to the battery cell is further improved, the possibility of thermal runaway of the battery cell is further reduced, and therefore the safety of the battery is further improved. In addition, by further setting the area ratio of the second heat conduction layer to the first surface, the contact area between the second heat conduction layer and the first surface is further increased, the heat exchange capacity of the second heat conduction layer to the battery cell is further improved, the possibility of thermal runaway of the battery cell is further reduced, and therefore the safety of the battery is further improved.

In some embodiments of the application, the first heat conductive layer has a size a in an arrangement direction of the plurality of battery cells, the a ranging from 0.1mm to 5mm. Through setting up the heat conduction layer in the ascending size of a plurality of battery monomer's range, can make the volume of first heat conduction layer obtain reducing on the basis that first heat conduction layer satisfies battery monomer's heat exchange demand to reduce battery pack's volume, and then can improve battery's space utilization.

In some embodiments of the application, the second heat conductive layer has a size b in an arrangement direction of the plurality of battery cells, and b ranges from 0.1mm to 5mm. Through setting up the heat conduction layer in the ascending size of a plurality of battery monomer's range direction, can make the volume of second heat conduction layer obtain reducing on the basis that the second heat conduction layer satisfies battery monomer's heat exchange demand to reduce battery pack's volume, and then can improve battery's space utilization.

In some embodiments of the application, the a ranges from 0.2mm to 3mm;

and/or b is in the range of 0.2mm to 3mm.

Through further setting up the first heat-conducting layer in the ascending size of a plurality of battery monomer's arrangement, can make the volume of first heat-conducting layer obtain further reduction on the basis that first heat-conducting layer satisfies battery monomer's heat exchange demand, realized the further reduction of battery pack's volume, further improved the space utilization of battery. In addition, through further setting up the size of second heat conduction layer in the single orientation of a plurality of battery, can make the volume of second heat conduction layer obtain further reduction on the basis that the heat exchange demand of battery is satisfied to the second heat conduction layer, realized the further reduction of battery pack's volume, further improved the space utilization of battery.

In some embodiments of the application, the thermal insulation layer has a size c in an arrangement direction of the plurality of battery cells, the c ranging from 0.1mm to 5mm. Through setting up the insulating layer in the ascending size of a plurality of battery monomer's arrangement direction, can make the volume of insulating layer obtain reducing on the insulating layer satisfies the elementary heat of battery and carries out the separation on the basis to reduce battery pack's volume, and then can improve battery's space utilization.

In some embodiments of the application, the c ranges from 0.2mm to 3mm. Through further setting up the insulating layer in the ascending size of a plurality of battery monomer's arrangement direction, can make the volume of insulating layer obtain further reduction on the insulating layer satisfies the heat of battery monomer and carries out the separation on the basis, further reduced battery pack's volume to can further improve the space utilization of battery.

In some embodiments of the present application, the connection between the first heat conducting layer and the heat insulating layer is adhesive, clamping, welding or riveting;

and/or the connection mode between the second heat conduction layer and the heat insulation layer is bonding, clamping, welding or riveting.

Through the setting of the fixed mode of being connected between first heat conduction layer and the insulating layer to make joint strength and the stability between first heat conduction layer and the insulating layer obtain improving effectively, reduced the condition of first heat conduction layer and insulating layer separation, make the overall structure intensity of isolator obtain improving. Through the setting of the fixed mode of being connected between second heat conduction layer and the insulating layer to make joint strength and the stability between second heat conduction layer and the insulating layer obtain improving effectively, reduced the condition of second heat conduction layer and insulating layer separation, make the overall structure intensity of isolator obtain further improving.

In some embodiments of the application, the first thermally conductive layer comprises at least one of a copper piece, an aluminum piece, and a graphite piece;

and/or the second heat conduction layer comprises at least one of a copper piece, an aluminum piece and a graphite piece;

and/or the heat insulation layer comprises at least one of foam, ceramic piece and silica aerosol.

Through the setting to first heat conduction layer and second heat conduction layer to make first heat conduction layer and second heat conduction layer can adapt to the free heat exchange demand of different batteries, make heat exchange efficiency can obtain improving. In addition, through setting up the insulating layer for the insulating layer has good heat-insulating properties, thereby can satisfy the thermal-insulated demand of different batteries, make the security of battery obtain promoting effectively.

In some embodiments of the present application, the connection between the first heat conducting layer and the heat conducting member is welding, bonding, riveting or clamping;

and/or the connection mode between the second heat conduction layer and the heat conduction piece is welding, bonding, riveting or clamping.

Through the setting of the fixed mode of being connected to first heat conduction layer and heat conduction spare for the connection stability between first heat conduction layer and the heat conduction spare obtains improving, has reduced the relative heat conduction spare of first heat conduction layer and has become flexible and lead to the problem that the heat transfer effect is impaired. The same through the setting to second heat conduction layer and heat conduction spare connection fixed mode for the connection stability between second heat conduction layer and the heat conduction spare obtains improving, has reduced the relative heat conduction spare of second heat conduction layer and has become flexible and lead to the problem that the heat transfer effect is bad.

A second aspect of the application proposes a powered device comprising a battery according to the above.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Fig. 1 schematically shows a schematic structural diagram of an electrical consumer according to an embodiment of the application;

fig. 2 is a schematic view of the structure of the battery shown in fig. 1;

FIG. 3 is a schematic view of a portion of the structure shown in FIG. 2;

fig. 4 is a partial schematic structural view of the structure shown in fig. 3 (the separator is the first embodiment);

FIG. 5 is a schematic view of the structure of the separator shown in FIG. 4;

fig. 6 is a partial schematic structural view of the structure shown in fig. 3 (the separator is a second embodiment);

FIG. 7 is a schematic view of the structure of the separator shown in FIG. 6;

fig. 8 is a partial schematic structural view of the structure shown in fig. 3 (the separator is the third embodiment and is in a separated state from the heat conductive member);

fig. 9 is a schematic structural view of the separator shown in fig. 8.

The reference numerals are as follows:

1000. a vehicle;

100. a battery; 200. A controller; 300. a motor;

110. a battery assembly;

10. a battery cell;

11. a first surface;

120. a case;

121. a first portion; 122. a second portion;

130. a heat conductive member;

131. a first clamping groove; 132. a second clamping groove;

140. a partition;

141. a first heat conductive layer; 1411. a first flanging; 1412. a first thermally conductive surface; 142. a thermal insulation layer; 1421. a heat insulating surface; 143. a second heat conductive layer; 1431. a second flanging; 1432. a second thermally conductive surface;

x is the arrangement direction of the plurality of battery cells.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the 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 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.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

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

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

In the prior art, a battery generally includes a plurality of battery cells arranged in an internal portion of the battery. In the use, when thermal runaway takes place for a battery monomer, thermal runaway's battery monomer can give adjacent battery monomer with heat transfer to lead to adjacent battery monomer to take place thermal runaway, and then lead to taking place thermal spread between a plurality of battery monomers, easily lead to the incident of battery.

According to the application, the partition piece is arranged between two adjacent battery monomers, the partition piece comprises the heat insulation layer, the first heat conduction layer and the second heat conduction layer are respectively arranged on two opposite sides of the heat insulation layer, one of the two adjacent battery monomers is in heat conduction connection with the heat conduction piece through the first heat conduction layer, and the other battery monomer is connected with the heat conduction piece through the second heat conduction layer, so that heat in the use process of the two adjacent battery monomers can be transferred to the heat conduction piece, and the battery monomers can be operated at safe and stable temperature. Through setting up the insulating layer between first heat-conducting layer and second heat-conducting layer, when a battery monomer takes place thermal runaway, its thermal runaway's heat is blocked by the insulating layer, has reduced the possibility to adjacent battery monomer transfer heat to the condition that takes place thermal spread between the battery monomer has been reduced, has made the security of battery improved effectively.

The battery according to the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the use of the battery. A power supply system including the battery cell, the battery, and the like according to the present application, which constitute the power utilization device, may be used.

The electric equipment using the battery as the power supply in the embodiment of the application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described batteries and electric devices, but may be applied to all batteries including a case and electric devices using the batteries, but for simplicity of description, the following embodiments are described by taking an electric vehicle as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided 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 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present 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.

Fig. 2 shows a schematic structure of a battery 100 according to an embodiment of the present application. In fig. 2, the battery 100 may include a plurality of battery packs 110 and a case 120, and the plurality of battery packs 110 are accommodated inside the case 120. The case 120 is used to house the battery assembly 110 to prevent liquid or other foreign matter from affecting the charge or discharge of the battery cells. The case 120 may have a simple three-dimensional structure such as a rectangular parallelepiped, a cylinder, or a sphere, or may have a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped, a cylinder, or a sphere. The material of the case 120 may be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

To meet different usage power requirements, the battery assembly 110 may include a plurality of battery cells 10, and the battery cells 10 refer to the smallest units constituting the battery assembly. A plurality of battery cells 10 may be connected in series and/or parallel together via electrode terminals for use in various applications. The battery cell 10 may include, but is not limited to, a lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. In addition, the shape of the battery cell includes, but is not limited to, a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc.

In some embodiments, as shown in fig. 2, the case 120 may include a first portion 121 and a second portion 122, the first portion 121 and the second portion 122 being overlapped with each other, the first portion 121 and the second portion 122 together defining a space for accommodating the battery assembly 110. The second part 122 may have a hollow structure with one end opened, the first part 121 may have a plate-shaped structure, and the first part 121 covers the opening side of the second part 122, so that the first part 121 and the second part 122 together define a space for accommodating the battery assembly 110; the first portion 121 and the second portion 122 may be hollow structures with one side open, and the open side of the first portion 121 is covered with the open side of the second portion 122.

In some embodiments of the present application, as shown in fig. 2 to 9, the present application proposes a battery 100, the battery assembly 110 includes at least two battery cells 10, a heat conductive member 130, and at least one separator 140, each separator 140 is disposed between two adjacent battery cells 10, the separator 140 includes a heat insulating layer 142, a first heat conductive layer 141 and a second heat conductive layer 143, the first heat conductive layer 141 is in heat conductive connection with one of the two adjacent battery cells 10, the second heat conductive layer 143 is in heat conductive connection with the other of the two adjacent battery cells 10, the heat insulating layer 142 is disposed between the first heat conductive layer 141 and the second heat conductive layer 143 and is connected to the first heat conductive layer 141 and the second heat conductive layer 143, and the heat conductive member 130 and each separator 140 are in heat conductive connection.

In the present application, the separator 140 refers to a member disposed between two adjacent battery cells 10, and the two adjacent battery cells 10 are spaced apart by the separator 140, wherein the separator 140 includes a first heat conductive layer 141, a heat insulating layer 142, and a second heat conductive layer 143 stacked on each other, and the first heat conductive layer 141 and the second heat conductive layer 143 are disposed on opposite sides of the heat insulating layer 142, respectively, and are not connected, i.e., the first heat conductive layer 141 cannot transfer heat with the second heat conductive layer 143 through the heat insulating layer 142.

The thermally conductive connection of the partition 140 and the thermally conductive member 130 means that the partition 140 and the thermally conductive member 130 are capable of heat transfer, wherein at least one of the first thermally conductive layer 141 and the second thermally insulating layer 142 including the partition 140 is thermally conductive connected with the thermally conductive member 130.

The first heat conductive layer 141 has a heat transfer capability, i.e., heat can be transferred from a side having a high temperature to a side having a low temperature through the first heat conductive layer 141. The heat conductive connection of the first heat conductive layer 141 and the battery cell 10 on one side means that heat transfer can be performed between the first heat conductive layer 141 and the battery cell 10. The first heat conductive layer 141 may be in heat conductive connection with the heat conductive member 130, and the heat conductive connection of the first heat conductive layer 141 with the heat conductive member 130 means that heat transfer between the first heat conductive layer 141 and the heat conductive member 130 is possible.

Likewise, the second heat conductive layer 143 also has heat transfer capability, i.e., heat can be transferred from the side with higher temperature to the side with lower temperature through the first heat conductive layer 141. The heat conductive connection between the second heat conductive layer 143 and the battery cell 10 on the other side means that heat transfer can be performed between the second heat conductive layer 143 and the battery cell 10. The second heat conductive layer 143 may be in heat conductive connection with the heat conductive member 130, and the heat conductive connection between the second heat conductive layer 143 and the heat conductive member 130 means that heat transfer between the second heat conductive layer 143 and the heat conductive member 130 is possible.

In addition, the heat insulating layer 142 is a poor conductor of heat, has a good heat insulating ability, and can block heat by the heat insulating layer 142, so that heat transfer cannot be realized.

The heat conductive member 130, the heat conductive member 130 having a heat transfer capability, and when the first heat conductive layer 141 is connected to the heat conductive member 130, the battery cell 10 thermally connected to the first heat conductive layer 141 can transfer heat between the first heat conductive layer 141 and the heat conductive member 130; when the second heat conductive layer 143 is connected to the heat conductive member 130, the battery cell 10 thermally connected to the second heat conductive layer 143 can transfer heat between the second heat conductive layer 143 and the heat conductive member 130. In the present application, the heat conductive member 130 has heating capacity or cooling capacity, and as an example, the first heat conductive layer 141 and the second heat conductive layer 143 are both in heat conductive connection with the heat conductive member 130, when the temperature of the battery 100 is lower than the use temperature, the heat conductive member 130 can be used for heating, and the first heat conductive layer 141 is used for transferring heat to the battery cell 10 in heat conductive connection therewith, and the second heat conductive layer 143 is used for transferring heat to the battery cell 10 in heat conductive connection therewith, so that the temperature of the battery 100 can be satisfied for efficient operation; when the point meets the requirement of the use temperature; when the temperature of the battery 100 is higher than the use temperature, the cooling may be performed through the heat conductive member 130, and heat of the battery cell 10 thermally connected to the first heat conductive layer 141 is transferred to the heat conductive member 130 through the first heat conductive layer 141, and heat of the battery cell 10 thermally connected to the second heat conductive layer 143 is transferred to the heat conductive member 130 through the second heat conductive layer 143, thereby reducing the temperature of the battery cell 10, so that the temperature of the battery 100 can satisfy efficient operation.

In the present application, the number of battery modules 110 in the battery 100 may be one or a plurality. Taking the number of the battery modules 110 as a plurality of examples, the heat conducting members 130 are plate-shaped members, and the heat conducting members 130 which are plate-shaped members may be arranged between two adjacent battery modules 110 or at the bottom or top of all the battery modules 110.

The heat conductive member 130 may be a semiconductor composite plate (PTC refrigeration plate, etc.) having cooling and heating capabilities to satisfy the use requirements of the battery 100. The heat conductive member 130 may be a plate-like member having a medium flow path, and a heat exchange medium (such as water or an organic solvent) may be circulated in the medium flow path, and the heat exchange medium exchanges heat with the battery cell 10 via the heat conductive member 130 and the heat conductive layer.

In the battery 100 of the present application, all the battery cells 10 in each battery assembly 110 are arranged in a row, the separator 140 is disposed between two adjacent battery cells 10, and the two adjacent battery cells 10 are respectively connected with the heat conducting member 130 in a heat conducting manner by using the first heat conducting layer 141 and the second heat conducting layer 143, so that heat in the use process of the battery cells 10 can be transferred to the heat conducting member 130, and the battery cells 10 can be operated at a safe and stable temperature.

By providing the heat insulating layer 142 between the first and second heat conductive layers 141 and 143, when thermal runaway occurs in one battery cell 10, the heat of the thermal runaway is blocked by the heat insulating layer 142, reducing the possibility of transferring heat to the adjacent battery cell 10, thereby reducing the occurrence of thermal runaway between the battery cells 10, and effectively improving the safety of the battery 100.

In some embodiments of the present application, as shown in fig. 2, 6 and 8, the battery cell 10 includes a plurality of surfaces, the plurality of surfaces includes a first surface 11 with the largest area, opposite sides of the insulating layer 142 are respectively provided with an insulating surface 1421, the insulating surface 1421 is disposed opposite to the first surface 11 of the adjacent battery cell 10, and the area ratio of the insulating surface 1421 to the first surface 11 ranges from 0.7 to 1.2.

The first surface 11 having the largest area means that the first surface 11 is one of the surfaces of the battery cell 10, and the area of the first surface 11 is larger than the area of any other surface.

The heat insulating surface 1421 being disposed opposite to the first surface 11 means that the heat insulating surface 1421 is disposed parallel to the first surface 11 and opposite to the first surface 11 (i.e., an overlapping region is provided between the heat insulating surface 1421 and the first surface 11 in the arrangement direction of the plurality of battery cells 10). By arranging the heat insulating surface 1421 and the first surface 11, when the battery cell 10 exchanges heat, most of heat of the battery cell 10 is transferred through the first surface 11, so that the heat insulating effect on the battery cell 10 can be improved by arranging the heat insulating surface 1421 and the first surface 11 of the battery cell 10 opposite to each other, and the situation that adjacent battery cells 10 are spread by heat can be further reduced.

In the present application, the area of the insulating surface 1421 may be greater than, equal to, or less than the area of the first surface 11, and when the area of the insulating surface 1421 is greater than the area of the first surface 11, the projection of the first surface 11 formed on the insulating surface 1421 completely falls within the area of the insulating surface 1421 in the arrangement direction of the plurality of battery cells 10; when the area of the insulating surface 1421 is equal to the area of the first surface 11, the projection of the first surface 11 on the insulating surface 1421 also falls completely within the area of the insulating surface 1421 along the arrangement direction of the plurality of battery cells 10; when the area of the insulating surface 1421 is smaller than the area of the first surface 11, the projection of the insulating surface 1421 formed on the first surface 11 falls entirely within the area of the first surface 11 along the arrangement direction of the plurality of battery cells 10.

It should be understood that when the area ratio of the insulating surface 1421 to the first surface 11 is smaller than 0.7, the difference between the insulating surface 1421 and the first surface 11 is larger, and the shielding position of the insulating surface 1421 to the first surface 11 is smaller, so that when the battery cell 10 performs heat transfer through the first surface 11, the heat-resisting effect of the insulating surface 1421 to the battery cell 10 is poor; when the area ratio of insulating surface 1421 to first surface 11 is greater than 1.2, insulating surface 1421 has a large volume, which tends to reduce the space utilization in battery 100.

In addition, by setting the area ratio of the insulating surface 1421 to the first surface 11 to be in the range of 0.7-1.2 (including two end points), the insulating surface 1421 can sufficiently cover the area of the first surface 11, the heat blocking effect on the battery cell 10 can be further improved, the problem of heat spreading of the battery cell 10 is further reduced, and the safety of the battery 100 is further improved.

It should be noted that in the present application, the area ratio of the insulating surface 1421 to the first surface 11 may be 0.7, 0.75, 0.81, 0.85, 0.9, 0.95, 1.1, 1.5, 1.2.

The shape of the insulating surface 1421 may be the same as or different from the shape of the first surface 11. In the present application, the shape of the insulating surface 1421 is identical to the shape of the first surface 11 of the battery cell 10.

In some embodiments of the application, the area ratio of insulating surface 1421 to first surface 11 ranges from 0.8 to 1. By further setting the area ratio of the heat insulating surface 1421 to the first surface 11, the covering capability of the heat insulating surface 1421 to the first surface 11 is further increased, so that the heat blocking effect on the battery cell 10 is further improved, the heat spreading problem of the battery cell 10 is further reduced, and the safety of the battery 100 is further improved.

It should be noted that in the present application, the area ratio of the insulating surface 1421 to the first surface 11 may be 0.8, 0.84, 0.91, 0.96, 1.

In some embodiments of the present application, the first heat conducting layer 141 has a first heat conducting surface 1412, the first heat conducting surface 1412 is in heat conducting connection with the first surface 11 of the battery cell 10 disposed adjacently, and the area ratio of the first heat conducting surface 1412 to the first surface 11 is in the range of 0.5-1.2.

In the present application, the area of the first heat conducting surface 1412 may be greater than, equal to, or less than the area of the first surface 11, and when the area of the first heat conducting surface 1412 is greater than the area of the first surface 11, the projection of the first surface 11 formed on the first heat conducting surface 1412 falls entirely within the area of the first heat conducting surface 1412 along the arrangement direction of the plurality of battery cells 10; when the area of the first heat conducting surface 1412 is equal to the area of the first surface 11, the projection formed by the first surface 11 on the first heat conducting surface 1412 also falls completely within the area of the first heat conducting surface 1412 along the arrangement direction of the plurality of battery cells 10; when the area of the first heat conducting surface 1412 is smaller than the area of the first surface 11, the projection of the first heat conducting surface 1412 formed on the first surface 11 falls completely within the area of the first surface 11 along the arrangement direction of the plurality of battery cells 10.

It should be understood that when the area ratio of the first heat conducting surface 1412 to the first surface 11 is smaller than 0.5, the difference between the first heat conducting surface 1412 and the first surface 11 is larger, and the contact area between the first heat conducting surface 1412 and the first surface 11 is smaller, so that when the battery cell 10 performs heat transfer through the first surface 11, the heat conducting effect of the first heat conducting surface 1412 on the battery cell 10 is poor; when the area ratio of first heat conducting surface 1412 to first surface 11 is greater than 1.2, the volume of first heat conducting surface 1412 is large, which tends to reduce the space utilization within battery 100.

In addition, by setting the area ratio of the first heat conducting surface 1412 to the first surface 11 to be in the range of 0.5-1.2 (including two end points, the contact area between the first heat conducting surface 1412 and the first surface 11 can be increased, so that the heat exchange capacity of the first heat conducting surface 1412 to the battery cell 10 can be improved, the possibility of thermal runaway of the battery cell 10 can be reduced, and the safety of the battery 100 can be further improved.

It should be noted that, in the present application, the area ratio of the first heat conducting surface 1412 to the first surface 11 may be 0.5, 0.55, 0.6, 0.65, 0.75, 0.81, 0.85, 0.9, 0.95, 1.1, 1.5, 1.2.

The shape of the first heat conductive surface 1412 may be the same as or different from the shape of the first surface 11. In the present application, the shape of the first heat conducting surface 1412 is identical to the shape of the first surface 11 of the battery cell 10.

In addition, the first heat conducting surface 1412 and the first surface 11 of the battery cell 10 may be abutted together, or may be connected together by a heat conducting adhesive.

In some embodiments of the present application, the area ratio of the first thermally conductive surface 1412 to the first surface 11 ranges from 0.8 to 1. By further setting the area ratio of the first heat conducting surface 1412 to the first surface 11, the contact area between the first heat conducting surface 1412 and the first surface 11 is further increased, the heat exchange capability of the first heat conducting surface 1412 to the battery cell 10 is further improved, the possibility of thermal runaway of the battery cell 10 is further reduced, and the safety of the battery 100 is further improved.

It should be noted that, in the present application, the area ratio of the first heat conducting surface 1412 to the first surface 11 may be 0.8, 0.84, 0.91, 0.96, 1.

In some embodiments of the present application, the second heat conducting layer 143 has a second heat conducting surface 1432, the second heat conducting surface 1432 is in heat conducting connection with the first surface 11 of the battery cell 10 adjacently disposed, and the area ratio of the second heat conducting surface 1432 to the first surface 11 ranges from 0.5 to 1.2.

In the present application, the area of the second heat conducting surface 1432 may be greater than, equal to, or smaller than the area of the first surface 11, and when the area of the second heat conducting surface 1432 is greater than the area of the first surface 11, the projection formed by the first surface 11 on the second heat conducting surface 1432 completely falls within the area of the second heat conducting surface 1432 along the arrangement direction of the plurality of battery cells 10; when the area of the second heat conducting surface 1432 is equal to the area of the first surface 11, along the arrangement direction of the plurality of battery cells 10, the projection formed by the first surface 11 on the second heat conducting surface 1432 also falls completely within the area of the second heat conducting surface 1432; when the area of the second heat conducting surface 1432 is smaller than the area of the first surface 11, the projection of the second heat conducting surface 1432 formed on the first surface 11 falls completely within the area of the first surface 11 along the arrangement direction of the plurality of battery cells 10.

It should be understood that when the area ratio of the second heat conducting surface 1432 to the first surface 11 is smaller than 0.5, the difference between the second heat conducting surface 1432 and the first surface 11 is larger, and the contact area between the second heat conducting surface 1432 and the first surface 11 is smaller, so that when the battery cell 10 performs heat transfer through the first surface 11, the heat conducting effect of the second heat conducting surface 1432 on the battery cell 10 is poor; when the area ratio of the second heat conducting surface 1432 to the first surface 11 is greater than 1.2, the volume of the second heat conducting surface 1432 is large, which tends to reduce the space utilization within the battery 100.

In addition, by setting the area ratio of the second heat conducting surface 1432 to the first surface 11 to be in the range of 0.5 to 1.2 (including two end points, the contact area between the second heat conducting surface 1432 and the first surface 11 can be increased, so that the heat exchanging capability of the second heat conducting surface 1432 to the battery cell 10 can be improved, the possibility of thermal runaway of the battery cell 10 can be reduced, and the safety of the battery 100 can be further improved.

It should be noted that in the present application, the area ratio of the second heat conducting surface 1432 to the first surface 11 may be 0.5, 0.55, 0.6, 0.65, 0.75, 0.81, 0.85, 0.9, 0.95, 1.1, 1.5, 1.2.

The shape of the second heat conducting surface 1432 may be the same as or different from the shape of the first surface 11. In the present application, the shape of the second thermally conductive surface 1432 is identical to the shape of the first surface 11 of the battery cell 10.

In addition, the second heat conducting surface 1432 and the first surface 11 of the battery cell 10 may be abutted together, or may be connected together by a heat conducting glue.

In some embodiments of the application, the area ratio of the second thermally conductive surface 1432 to the first surface 11 is in the range of 0.8-1. By further setting the area ratio of the second heat conducting surface 1432 to the first surface 11, the contact area between the second heat conducting surface 1432 and the first surface 11 is further increased, the heat exchange capability of the second heat conducting surface 1432 to the battery cell 10 is further improved, the possibility of thermal runaway of the battery cell 10 is further reduced, and the safety of the battery 100 is further improved.

It should be noted that in the present application, the area ratio of the second heat conducting surface 1432 to the first surface 11 may be 0.8, 0.84, 0.91, 0.96, 1.

In some embodiments of the present application, the first heat conductive layer 141 has a size a in the range of 0.1mm to 5mm in the arrangement direction of the plurality of battery cells 10.

The arrangement direction of the plurality of batteries 100 means that the plurality of batteries 100 are arranged in an array, and the array direction is the arrangement direction of the plurality of batteries 100, as shown in fig. 3, and x is the arrangement direction of the plurality of batteries 100 in fig. 3.

In the arrangement direction of the plurality of batteries 100, the first heat conductive layer 141 has a first preset size, as shown in fig. 5, a is represented as the first preset size in fig. 5, and when a is less than 0.1mm, the first heat conductive layer 141 has a smaller size, and the heat exchange capability thereof is weak, so that it is difficult to satisfy the heat exchange requirement of the battery cell 10; when a is greater than 5mm, the size of the first heat conductive layer 141 is large, which increases the overall structure of the battery assembly 110, and tends to cause the internal space utilization of the battery 100 to be lowered.

By setting the range of a to 0.1mm to 5mm, the volume of the first heat conductive layer 141 can be reduced on the basis that the first heat conductive layer 141 satisfies the heat exchange requirement of the battery cell 10, thereby reducing the volume of the battery assembly 110 and further improving the space utilization of the battery 100.

It should be noted that in the present application, the value of a may be 0.1mm, 0.15mm, 0.21mm, 0.25mm, 0.3mm, 0.4mm, 1mm, 2mm, 2.5mm, 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm.

In some embodiments of the application, a ranges from 0.2mm to 3mm. By further setting the dimensions of the first heat conductive layer 141 in the arrangement direction of the plurality of battery cells 10, the volume of the first heat conductive layer 141 can be further reduced on the basis that the first heat conductive layer 141 satisfies the heat exchange requirements of the battery cells 10, thereby realizing further reduction of the volume of the battery assembly 110 and further improving the space utilization rate of the battery 100.

It should be noted that in the present application, the value of a may be 0.2mm, 0.26mm, 0.31mm, 0.41mm, 1.1mm, 2.1mm, 2.6mm, 3mm.

In some embodiments of the present application, the second heat conductive layer 143 has a size b in the range of 0.1mm to 5mm in the arrangement direction of the plurality of battery cells 10.

In the arrangement direction of the plurality of batteries 100, the second heat conductive layer 143 has a second preset size, as shown in fig. 5, b is represented as a second preset size in fig. 5, and when b is less than 0.1mm, the second heat conductive layer 143 has a smaller size, and the heat exchange capability thereof is weak, so that it is difficult to satisfy the heat exchange requirement of the battery cell 10; when b is greater than 5mm, the second heat conductive layer 143 has a large size, which increases the overall structure of the battery assembly 110, and tends to lower the internal space utilization of the battery 100.

By setting the range of b to 0.1mm to 5mm, the volume of the second heat conductive layer 143 can be reduced on the basis that the second heat conductive layer 143 satisfies the heat exchange requirement of the battery cell 10, thereby reducing the volume of the battery assembly 110 and further improving the space utilization of the battery 100.

It should be noted that in the present application, the value of b may be 0.1mm, 0.15mm, 0.21mm, 0.25mm, 0.3mm, 0.4mm, 1mm, 2mm, 2.5mm, 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm.

In some embodiments of the application, b ranges from 0.2mm to 3mm. Through further setting up the size of second heat conduction layer 143 in the range direction of a plurality of battery cell 10, can make the volume of second heat conduction layer 143 obtain further reduction on the basis that second heat conduction layer 143 satisfies the heat exchange demand of battery cell 10, realize the further reduction of battery pack 110's volume, further improved battery 100's space utilization.

It should be noted that in the present application, the value of b may be 0.2mm, 0.26mm, 0.31mm, 0.41mm, 1.1mm, 2.1mm, 2.6mm, 3mm.

In some embodiments of the present application, the thermal insulation layer 142 has a size c in the range of 0.1mm to 5mm along the arrangement direction of the plurality of battery cells 10.

In the arrangement direction of the plurality of batteries 100, the heat insulation layer 142 has a third preset size, as shown in fig. 5, c is represented as the third preset size in fig. 5, and when c is less than 0.1mm, the heat insulation layer 142 has a smaller size, and has weaker heat insulation capacity, so that it is difficult to meet the heat insulation requirements between the battery cells 10; when c is greater than 5mm, the larger size of the insulating layer 142 may increase the overall structure of the battery assembly 110, which may easily result in lower internal space utilization of the battery 100.

By setting the range of c to 0.1mm to 5mm, the volume of the heat insulating layer 142 can be reduced on the basis that the heat insulating layer 142 satisfies the heat of the battery cell 10 for blocking, thereby reducing the volume of the battery assembly 110 and further improving the space utilization rate of the battery 100.

It should be noted that in the present application, the value of c may be 0.1mm, 0.15mm, 0.21mm, 0.25mm, 0.3mm, 0.4mm, 1mm, 2mm, 2.5mm, 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm.

In some embodiments of the application, c ranges from 0.2mm to 3mm. By further setting the dimensions of the insulating layer 142 in the arrangement direction of the plurality of battery cells 10, the volume of the insulating layer 142 can be further reduced on the basis that the insulating layer 142 satisfies the heat of the battery cells 10 for blocking, and the volume of the battery assembly 110 can be further reduced, so that the space utilization rate of the battery 100 can be further improved.

It should be noted that in the present application, the value of c may be 0.2mm, 0.26mm, 0.31mm, 0.41mm, 1.1mm, 2.1mm, 2.6mm, 3mm.

In some embodiments of the present application, the connection between the first heat conductive layer 141 and the heat insulating layer 142 is adhesive, clamping, welding or riveting.

The first heat conducting layer 141 is connected with the heat insulating layer 142, and an integral structure is formed between the first heat conducting layer 141 and the heat insulating layer 142 through connection, so that the relative position between the first heat conducting layer 141 and the heat insulating layer 142 in the use process is reduced, and the heat conduction and heat insulation effects on the battery cell 10 are improved.

The first heat conducting layer 141 and the heat insulating layer 142 have various connection and fixation modes:

for example, the first heat conducting layer 141 and the heat insulating layer 142 are connected and fixed by an adhesive, and the manner of connecting and fixing the adhesive has a simple structure and is convenient to implement, so that the manufacturing cost can be effectively reduced.

For another example, the first heat conducting layer 141 and the heat insulating layer 142 are connected and fixed by a buckle, and the first heat conducting layer 141 and the heat insulating layer 142 can form a detachable structure in a clamping and fixing manner, so that when one of the first heat conducting layer 141 and the heat insulating layer 142 needs to be replaced, the separate replacement can be realized, and the replacement cost is further reduced.

For another example, the first heat conducting layer 141 and the heat insulating layer 142 are welded and fixed, so that the welded and fixed structure has high strength and good stability, and the displacement of the first heat conducting layer 141 relative to the heat insulating layer 142 can be effectively reduced.

For another example, the first heat conducting layer 141 and the heat insulating layer 142 are fixed by riveting or screw connection, and the riveting or screw connection and fixation manner also has the performance of high structural strength and good stability, and can effectively reduce the displacement of the first heat conducting layer 141 relative to the heat insulating layer 142.

In some embodiments of the present application, the connection between the second heat conductive layer 143 and the heat insulating layer 142 is adhesive, clamping, welding or riveting.

The second heat conduction layer 143 is connected with the heat insulation layer 142, and an integral structure is formed between the second heat conduction layer 143 and the heat insulation layer 142 through connection, so that the relative position between the second heat conduction layer 143 and the heat insulation layer 142 in the use process is reduced, and the heat conduction and heat insulation effects on the battery cell 10 are improved.

The second heat conducting layer 143 and the heat insulating layer 142 have various connection and fixation modes:

for example, the second heat conducting layer 143 and the heat insulating layer 142 are connected and fixed by an adhesive, and the manner of connecting and fixing by the adhesive has a simple structure and is convenient to implement, so that the manufacturing cost can be effectively reduced.

For example, the second heat conducting layer 143 and the heat insulating layer 142 are connected and fixed through a buckle, and a detachable structure is formed between the second heat conducting layer 143 and the heat insulating layer 142 in a clamping and fixing mode, so that when one of the second heat conducting layer 143 and the heat insulating layer 142 needs to be replaced, the other heat conducting layer can be replaced independently, and replacement cost is reduced.

For another example, the second heat conducting layer 143 and the heat insulating layer 142 are fixed by welding, so that the structure strength and stability of the welding and fixing mode are high, and the displacement of the second heat conducting layer 143 relative to the heat insulating layer 142 can be effectively reduced.

For another example, the second heat conducting layer 143 and the heat insulating layer 142 are fixed by riveting or screw connection, and the riveting or screw connection and fixation mode also has the performance of high structural strength and good stability, and can effectively reduce the displacement of the second heat conducting layer 143 relative to the heat insulating layer 142.

In some embodiments of the present application, the first heat conductive layer 141 includes at least one of a copper member, an aluminum member, and a graphite member.

The first heat conductive layer 141 may be formed by one of a copper member, an aluminum member, and a graphite member, or may be formed by any two or three of the copper member, the aluminum member, and the graphite member together. In the present application, the first heat conductive layer 141 is formed by one of a copper member, an aluminum member, and a graphite member.

When the first heat conducting layer 141 is a copper part, the heat conducting performance of the first heat conducting layer 141 of the copper part is better, so that the heat conducting efficiency between the first heat conducting layer 141 and the battery cell 10 can be improved.

When the first heat conductive layer 141 is an aluminum product, the cost of the first heat conductive layer 141 of the aluminum product is low, and the manufacturing cost of the first heat conductive layer 141 can be effectively reduced, so that the manufacturing cost of the battery 100 can be effectively reduced.

When the first heat conducting layer 141 is a graphite member, the cost of the first heat conducting layer 141 of the graphite member is low, and the heat conducting performance is better, so that the manufacturing cost of the first heat conducting layer 141 can be effectively reduced on the basis of reducing the first heat conducting layer 141, and the manufacturing cost of the battery 100 can be effectively reduced.

Through the arrangement of the first heat conduction layer 141, the first heat conduction layer 141 can adapt to the heat exchange requirements of different battery cells 10, so that the heat exchange efficiency can be improved.

In some embodiments of the present application, the second thermally conductive layer 143 includes at least one of a copper member, an aluminum member, and a graphite member.

The second heat conductive layer 143 may be formed by one of a copper member, an aluminum member, and a graphite member, may be formed by any two of a copper member, an aluminum member, and a graphite member (formed by joining two materials), or may be formed by any three of a copper member, an aluminum member, and a graphite member (formed by joining three materials). In the present application, the second heat conductive layer 143 is formed of one of a copper member, an aluminum member, and a graphite member.

When the second heat conduction layer 143 is a copper part, the heat conduction performance of the second heat conduction layer 143 of the copper part is better, so that the heat conduction efficiency between the second heat conduction layer 143 and the battery cell 10 can be improved.

When the second heat conductive layer 143 is an aluminum member, the second heat conductive layer 143 of the aluminum member has low cost, and the manufacturing cost of the second heat conductive layer 143 can be effectively reduced, so that the manufacturing cost of the battery 100 can be effectively reduced.

When the second heat conducting layer 143 is a graphite member, the cost of the second heat conducting layer 143 of the graphite member is low, and the heat conducting performance is better, so that the manufacturing cost of the second heat conducting layer 143 can be effectively reduced on the basis of reducing the second heat conducting layer 143, and the manufacturing cost of the battery 100 can be effectively reduced.

Through the arrangement of the second heat conduction layer 143, the second heat conduction layer 143 can adapt to the heat exchange requirements of different battery cells 10, so that the heat exchange efficiency can be improved.

In some embodiments of the present application, the insulating layer 142 includes at least one of foam, ceramic, and silica aerosol.

The heat insulating layer 142 may be formed by one of foam, ceramic, and silica aerosol, or may be formed by any two of foam, ceramic, and silica aerosol (formed by joining two materials), or may be formed by any three of foam, ceramic, and silica aerosol (formed by joining three materials). In the present application, the insulating layer 142 is formed by one of foam, ceramic, and silica aerosol.

When the heat insulating layer 142 is foam, the foam is low in manufacturing cost, and the manufacturing cost of the battery 100 can be effectively reduced.

When the heat insulating layer 142 is a ceramic member, the ceramic member has a good heat insulating effect, and the heat insulating effect between two adjacent battery cells 10 can be effectively improved.

When the heat insulating layer 142 is a silica aerosol, the silica aerosol also has a good heat insulating effect, and can effectively improve the heat insulating effect between two adjacent battery cells 10.

Through setting up insulating layer 142 for insulating layer 142 has good heat-insulating properties, thereby can satisfy the thermal-insulated demand of different batteries 100, make the security of battery 100 obtain effectively promoting.

In some embodiments of the present application, the first heat conductive layer 141 and the heat conductive member 130 have various connection manners, including but not limited to welding, bonding, riveting or clamping.

For example: in the present application, as shown in fig. 4 and 5, the first heat conductive layer 141, the second heat conductive layer 143 and the heat insulating layer 142 are all rectangular structures, and are stacked and formed into a sandwich structure, the first heat conductive layer 141 and the second heat conductive layer 143 are respectively connected with two adjacent battery cells 10 in a heat conduction manner, and simultaneously the first heat conductive layer 141 and the second heat conductive layer 143 are also respectively connected with the heat conductive member 130 in a heat conduction manner, wherein the end parts of the stacked positions of the first heat conductive layer 141, the second heat conductive layer 143 and the heat insulating layer 142 are abutted against the heat conductive member 130, and the first heat conductive layer 141 is fixedly connected with the heat conductive member 130 by welding, soldering, riveting or the like, so that the connection strength between the first heat conductive layer 141 and the heat conductive member 130 is improved.

For example: as shown in fig. 6 and 7, a first flange 1411 may be disposed at an end portion of the first heat conductive layer 141 connected to the heat conductive member 130, where the first flange 1411 abuts against the heat conductive member 130, and the first flange 1411 is welded to the heat conductive member 130 by welding, soldering, riveting, or the like, so that a contact area between the first heat conductive layer 141 and the heat conductive member 130 can be increased by providing the first flange 1411, thereby improving a fixing strength between the first heat conductive layer 141 and the heat conductive member 130, and further improving a connection stability between the partition 140 and the heat conductive member 130.

For example: as shown in fig. 8 and 9, the heat conducting member 130 is provided with a first clamping groove 131, one end of the first heat conducting layer 141 is inserted into the first clamping groove 131, and the first heat conducting layer 141 and the notch of the first clamping groove 131 are welded and fixed by welding, riveting or clamping, so as to improve the connection strength and stability between the partition member 140 and the heat conducting member 130.

Through the setting of the fixed mode of being connected to first heat conduction layer 141 and heat conduction spare 130 for the connection stability between first heat conduction layer 141 and the heat conduction spare 130 obtains improving, has reduced the problem that first heat conduction layer 141 becomes flexible and leads to the heat transfer effect to be poor relative heat conduction spare 130.

In some embodiments of the present application, the second heat conductive layer 143 and the heat conductive member 130 have a plurality of connection manners, including but not limited to welding, bonding, riveting or clamping.

For example: as shown in fig. 4 and 5, in the present application, the first heat conductive layer 141, the second heat conductive layer 143 and the heat insulating layer 142 are all rectangular structures, and are stacked to form a sandwich structure, the first heat conductive layer 141 and the second heat conductive layer 143 are respectively connected with two adjacent battery cells 10 in a heat conduction manner, and simultaneously the first heat conductive layer 141 and the second heat conductive layer 143 are also respectively connected with the heat conductive member 130 in a heat conduction manner, wherein the end parts of the stacked positions of the first heat conductive layer 141, the second heat conductive layer 143 and the heat insulating layer 142 are abutted against the heat conductive member 130, and the second heat conductive layer 143 is fixedly connected with the heat conductive member 130 by welding, riveting or the like, so that the connection strength between the second heat conductive layer 143 and the heat conductive member 130 is improved.

For example: as shown in fig. 6 and 7, a second flange 1431 may be disposed at an end portion of the second heat conductive layer 143 connected to the heat conductive member 130, where the second flange 1431 abuts against the heat conductive member 130, and the second flange 1431 is welded to the heat conductive member 130 by welding, soldering, riveting, or the like, and by disposing the second flange 1431, a contact area between the second heat conductive layer 143 and the heat conductive member 130 can be increased, so that a fixing strength between the second heat conductive layer 143 and the heat conductive member 130 can be improved, and a connection stability between the partition 140 and the heat conductive member 130 can be improved.

For example: as shown in fig. 8 and 9, the heat conducting member 130 is provided with a second clamping groove 132, one end of the second heat conducting layer 143 is inserted into the second clamping groove 132, and the second heat conducting layer 143 is welded and fixed with the notch of the second clamping groove 132 by welding, soldering, riveting or clamping, so as to improve the connection strength and stability between the partition member 140 and the heat conducting member 130.

Through the setting of the fixed mode of being connected to second heat conduction layer 143 and heat conduction spare 130 for the connection stability between second heat conduction layer 143 and the heat conduction spare 130 obtains improving, has reduced the problem that second heat conduction layer 143 becomes flexible and leads to the heat transfer effect to be poor relative heat conduction spare 130.

As shown in fig. 1, the present application also proposes a powered device comprising a battery 100 according to the above.

The electric equipment has the battery 100, and the beneficial effects of the battery 100 are the same as those of the battery 100, and the application is not repeated here.

In an embodiment of the present application, as shown in fig. 2 to 9, the present application proposes a battery 100, the battery 100 including a battery assembly 110, a separator 140, and a heat conductive member 130, the heat conductive member 130 being disposed at the bottom of a case 120 of the battery 100, the number of the battery assemblies 110 being plural, the plurality of the battery assemblies 110 being disposed on the heat conductive member 130 in an arrangement. Each battery assembly 110 comprises at least two battery cells 10 arranged in an arrangement manner, a partition 140 is arranged between the two battery cells 10 arranged adjacently, the partition 140 comprises a heat insulation layer 142, a first heat conduction layer 141 and a second heat conduction layer 143, the first heat conduction layer 141 and the second heat conduction layer 143 are respectively arranged on two opposite sides of the heat insulation layer 142, one of the two battery cells 10 arranged adjacently is in heat conduction connection with the first heat conduction layer 141, the other of the two battery cells 10 arranged adjacently is in heat conduction connection with the second heat conduction layer 143, and the first heat conduction layer 141 and the second heat conduction layer 143 are in heat conduction connection with the heat conduction piece 130.

Further, the battery cell 10 includes a plurality of surfaces including the first surface 11 with the largest area, and the insulating surface 1421 of the insulating layer 142 is disposed opposite to the first surface 11 of the adjacent battery cell 10, and the area ratio of the insulating surface 1421 to the first surface 11 is 1.

Further, the area ratio of the first heat conducting surface 1412 to the first surface 11 of the first heat conducting layer 141 is 1.

Further, the area ratio of the second heat conducting surface 1432 of the second heat conducting layer 143 to the first surface 11 is 1.

Further, the first heat conductive layer 141 has a size of 0.2mm in the arrangement direction of the plurality of battery cells 10.

Further, the second heat conductive layer 143 has a size of 0.2mm in the arrangement direction of the plurality of battery cells 10.

Further, the thermal insulation layer 142 has a size of 0.2mm in the arrangement direction of the plurality of battery cells 10.

Further, the first heat conductive layer 141 and the heat insulating layer 142 are connected by adhesion, and the second heat conductive layer 143 and the heat insulating layer 142 are connected by adhesion.

Further, the first heat conducting layer 141 is an aluminum piece, the second heat conducting layer 143 is an aluminum piece, and the heat insulating layer 142 is a ceramic piece.

Further, the first heat conductive layer 141 and the heat conductive member 130 are connected by welding, and the second heat conductive layer 143 and the heat conductive member 130 are also connected by welding.

In the battery 100 of the present application, the separator 140 is disposed between two adjacent battery cells 10, and the two adjacent battery cells 10 are respectively connected with the heat conducting member 130 by using the first heat conducting layer 141 and the second heat conducting layer 143, so that heat in the use process of the battery cells 10 can be transferred to the heat conducting member 130, and the battery cells 10 can be operated at a safe and stable temperature. By providing the heat insulating layer 142 between the first and second heat conductive layers 141 and 143, when thermal runaway occurs in one battery cell 10, the heat of the thermal runaway is blocked by the heat insulating layer 142, reducing the possibility of transferring heat to the adjacent battery cell 10, thereby reducing the occurrence of thermal runaway between the battery cells 10, and effectively improving the safety of the battery 100.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery, the battery comprising:

a battery assembly including at least two battery cells;

2. The battery of claim 1, wherein the area ratio of the insulating surface to the first surface ranges from 0.8 to 1.

3. The battery of claim 2, wherein the first thermally conductive layer has a first thermally conductive surface in thermally conductive connection with the first surface of the adjacently disposed battery cell, the area ratio of the first thermally conductive surface to the first surface being in the range of 0.5-1.2.

4. The battery of claim 3, wherein the second thermally conductive layer has a second thermally conductive surface in thermally conductive connection with the first surface of the adjacently disposed battery cell, the area ratio of the second thermally conductive surface to the first surface being in the range of 0.5-1.2.

5. The battery of claim 4, wherein the area ratio of the first thermally conductive surface to the first surface is in the range of 0.8 to 1;

6. The battery of claim 1, wherein the first thermally conductive layer has a size a in the arrangement direction of the at least two battery cells, the a being in the range of 0.1mm to 5mm.

7. The battery of claim 6, wherein the second thermally conductive layer has a size b in the arrangement direction of the at least two battery cells, the b being in the range of 0.1mm to 5mm.

8. The battery of claim 7, wherein a ranges from 0.2mm to 3mm;

and/or b is in the range of 0.2mm to 3mm.

9. The battery of claim 1, wherein the thermal insulation layer has a size c in the arrangement direction of the at least two battery cells, the c being in the range of 0.1mm to 5mm.

10. The battery of claim 9, wherein c ranges from 0.2mm to 3mm.

11. The battery of claim 1, wherein the first thermally conductive layer is bonded, clamped, welded or riveted to the insulating layer;

12. The battery of claim 1, wherein the first thermally conductive layer comprises at least one of a copper piece, an aluminum piece, and a graphite piece;

13. The battery of claim 1, wherein the first heat conductive layer is connected to the heat conductive member by welding, bonding, riveting or clamping;

14. A powered device comprising a battery according to any one of claims 1 to 13.