CN218448207U

CN218448207U - Battery and electric equipment

Info

Publication number: CN218448207U
Application number: CN202221836216.8U
Authority: CN
Inventors: 苗慧敏; 可庆朋
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2023-02-03
Anticipated expiration: 2032-07-15
Also published as: WO2024011881A1

Abstract

The application discloses a battery and a power consumption device. The battery includes: a case comprising a first wall; the battery monomer is accommodated in the box body; the heat management component is accommodated in the box body and used for accommodating media to adjust the temperature of the battery monomer; a buffer disposed between the thermal management component and the first wall; wherein the buffer is provided with a crush portion configured to absorb impact energy of the first wall to the thermal management component by deforming. The battery provided by the application has higher safety.

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

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

In the development of battery technology, how to improve the safety of batteries is a technical problem that needs to be solved urgently in the battery technology.

SUMMERY OF THE UTILITY MODEL

The application provides a battery and consumer, this battery has higher security.

The application is realized by the following technical scheme:

in a first aspect, the present application provides a battery comprising: a case comprising a first wall; the battery monomer is accommodated in the box body; the heat management component is accommodated in the box body and used for accommodating a medium to regulate the temperature of the battery cells; a buffer disposed between the thermal management component and the first wall; wherein the buffer is provided with a crush portion configured to absorb impact energy of the first wall on the thermal management component by deforming.

In the above scheme, through setting up the portion that contracts that bursts, can reduce the structural strength of bolster effectively, improve the energy-absorbing effect of bolster. When external force acts on the first wall, impact energy transferred from the first wall to the interior of the box body acts on the buffer piece, so that the crumple part deforms to absorb the impact energy, the influence of the impact energy on the thermal management part is reduced, the thermal management effect of the thermal management part on the battery cell is guaranteed, and the safety of the battery is further guaranteed.

According to some embodiments of the present application, the cushion has first and second opposing faces in a thickness direction, the first face being connected to the thermal management component; the crush portion includes a first hole formed in the first face.

In the above scheme, the crumple section comprises the first hole formed in the first surface, and the first hole can effectively reduce the structural strength of the buffer member and improve the buffering effect of the buffer member. The impact energy of the first wall to the thermal management component can enable the first hole to collapse and deform in a collapsing mode, so that the influence of the impact energy on the thermal management component is reduced, and the thermal management efficiency of the thermal management component to the battery cell is guaranteed.

According to some embodiments of the present application, the number of the first holes is plural, and the plural first holes are arranged uniformly and at intervals along a length direction and a width direction of the buffer.

In the above scheme, through setting up a plurality of first holes to further reduce the structural strength of bolster, improve the buffering effect of bolster, when receiving impact energy, the bolster can be fast, fully deform, in order to absorb impact energy effectively, guarantee that thermal management part is not influenced.

According to some embodiments of the present application, the crush section further comprises a second aperture formed in the second face.

In the above scheme, through forming the second hole on the second face, can further improve the buffering effect of bolster, when impact energy acted on the bolster, the deformation can be crumpled in the second hole, absorbs impact energy, reduces the influence that the thermal management part received.

According to some embodiments of the application, the first hole and/or the second hole is a blind hole.

In the above scheme, the buffer piece can be made of plastic, and a first hole or a second hole can be quickly formed in the first surface and/or the second surface through a plastic suction process.

According to some embodiments of the present application, the number of the second holes is plural, and the plural second holes are arranged uniformly and at intervals along a length direction and a width direction of the buffer.

In the above-mentioned scheme, through setting up a plurality of second holes to further reduce the structural strength of bolster, improve the buffering effect of bolster. When the thermal management component is impacted, the buffer piece can be quickly and fully deformed so as to effectively absorb the impact energy and ensure that the thermal management component is not affected.

According to some embodiments of the application, a projection of the second aperture on the first face does not overlap with the first aperture.

In the above scheme, second hole and first hole dislocation set can reduce the structural strength of bolster as far as possible, improves buffering effect.

According to some embodiments of the present application, the second hole is located between two adjacent first holes.

In the above scheme, the first holes and the second holes are arranged in a staggered mode so as to fully utilize the first surface and the second surface of the buffer piece, the volume ratio of the crumple part to the buffer piece is increased as much as possible, and the buffering effect of the buffer piece is improved as much as possible.

According to some embodiments of the application, the wall thickness between the second hole and the adjacent first hole is D, and 0.5mm ≦ D ≦ 2mm is satisfied.

In the scheme, when the wall thickness D is less than 0.5mm, the structural strength of the buffer part is weaker, and the first hole and the second hole are not easy to form; when the wall thickness D is larger than 2mm, the buffering capacity of the buffering part is weaker, therefore, in the embodiment of the application, the wall thickness D is limited to be not less than 0.5mm and not more than 2mm, the structural strength of the buffering part can be ensured, and meanwhile, the buffering capacity is better, so that the larger impact capacity can be effectively absorbed, and the safety of the heat management part is ensured.

According to some embodiments of the present application, the thickness of the buffer member is H, and H is more than or equal to 5mm and less than or equal to 20mm.

Among the above-mentioned scheme, thickness when the bolster is < 5mm, the buffering effect of bolster is relatively poor, and thickness when the bolster > 20mm can sacrifice the inner space of battery, reduces the energy density of battery, and for this application embodiment, the thickness H restriction of bolster is not less than 5mm and is less than or equal to H and is less than or equal to 20mm, can be when guaranteeing buffering effect for the battery has higher energy density.

According to some embodiments of the present application, the thermal management component comprises a first portion and a second portion that cover each other, the first portion and the second portion forming a flow channel therebetween for receiving a medium; the first portion than the second portion is farther away from the bolster, the first portion with the battery monomer is connected, the second portion with the bolster is connected, the coefficient of heat conductivity of second portion is less than the coefficient of heat conductivity of first portion.

In the above scheme, the thermal conductivity of the second part is smaller than that of the first part, so that the energy of the thermal management component exchanging heat with the outside can be reduced, and the energy loss of the thermal management component is reduced, that is, more energy can act on the battery monomer, and the temperature of the battery monomer is effectively adjusted.

According to some embodiments of the present application, the first portion is a metal piece and the second portion is a plastic piece, a plastic-based composite material piece, or an inorganic non-metallic material piece.

In the scheme, the first part is a metal piece, so that heat exchange can be effectively carried out between a medium in the heat management part and the single battery; the second part is a plastic part, a plastic-based composite material part or an inorganic non-metallic material part, and can effectively reduce heat exchange between the heat management part and the outside so as to save energy. Meanwhile, the second part is a plastic part, a plastic-based composite material part or an inorganic non-metallic material part, and the cost and the density of the second part are lower than those of metal, so that the manufacturing cost and the weight of the thermal management component can be reduced.

According to some embodiments of the present application, the buffer member is a plastic member, and the second portion is welded to the buffer member.

In the above scheme, when the buffer piece is a plastic piece, the buffer piece can be conveniently welded with the second part.

According to some embodiments of the application, a surface of the second part facing the first part is formed with a groove, the first part covering the groove to form the flow channel.

In the scheme, the second part is a plastic part, a plastic-based composite material part or an inorganic non-metallic material part, so that the groove can be conveniently formed on the surface of the second part, the manufacturing cost of the heat management component is reduced, and the manufacturing efficiency of the heat management component is improved.

In a second aspect, the present application further provides an electric device, including the battery of any one of the first aspect, the battery being configured to provide electric energy.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

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

FIG. 2 is a schematic diagram of a cell according to some embodiments of the present disclosure;

FIG. 3 is a schematic structural view of a thermal management component and a buffer according to some embodiments of the present application;

FIG. 4 is an exploded perspective view of a thermal management component and a cushioning member according to some embodiments of the present application;

FIG. 5 is a top view of a buffer according to some embodiments of the present application;

FIG. 6 is a bottom view of a bumper member according to some embodiments of the present application;

FIG. 7 is a schematic view of the internal structure of a buffer according to some embodiments of the present application;

FIG. 8 is a schematic view of a thermal management component in some embodiments of the present application;

FIG. 9 is a schematic view of a second portion of some embodiments of the present application.

Icon: 10-a box body; 10 a-a first body; 10 b-a second body; 101-a first wall; 11-a battery cell; 13-a thermal management component; 130-a first portion; 1301-a through hole; 131-a second portion; 132-a flow channel; 1310-grooves; 14-a buffer; 140-a first side; 141-a second face; 15-a crush section; 150-a first aperture; 151-second hole; 1000-a vehicle; 100-a battery; 200-a controller; 300-motor.

Detailed Description

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

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

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

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

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

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

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

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be rectangular parallelepiped or other shapes, which is not limited in the embodiments of the present application.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and an isolating membrane. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the positive current collector which is not coated with the positive active substance layer protrudes out of the positive current collector which is coated with the positive active substance layer, and the positive current collector which is not coated with the positive active substance layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative pole mass flow body and negative pole active substance layer, and the surface of negative pole mass flow body is scribbled to the negative pole active substance layer, and the negative pole mass flow body protrusion in the negative pole mass flow body of having scribbled the negative pole active substance layer of not scribbling the negative pole active substance layer, and the negative pole mass flow body of not scribbling the negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film may be PP (polypropylene) or PE (polyethylene).

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.

The battery also comprises a box body, one or more battery monomers are arranged in the box body, and the box body plays a role in protecting the battery monomers and avoids the battery monomers from being influenced by external objects.

The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and other performance parameters, and also needs to consider the safety of the battery. For example, thermal runaway of the battery may cause combustion and explosion of the battery, which seriously affects the safety of the battery. Thermal runaway is caused by the fact that the heat generation rate of the battery cells is much higher than the heat dissipation rate, and a large amount of accumulated heat is not dissipated in time.

To improve the safety of the battery, a thermal management component is also typically included in the battery. The heat management component is arranged in the box body. The thermal management component is used for accommodating a medium to regulate the temperature of the battery cells, so that the battery is in a proper temperature range, and higher safety is guaranteed. The medium may be a fluid (liquid) or a gas, and the temperature adjustment refers to heating or cooling of the plurality of battery cells, and the fluid may be referred to as a heat exchange medium. Alternatively, the fluid may be circulated to achieve better temperature regulation. Optionally, the fluid may be water, a mixture of water and glycol, air, or the like. For example, in the case of cooling or temperature reduction of the battery cells, the thermal management component is used for containing a cooling fluid to reduce the temperature of the plurality of battery cells, and at this time, the thermal management component may also be referred to as a cooling component, a cooling system, a cooling plate, or the like, and the contained fluid may also be referred to as a cooling medium or a cooling fluid, and more specifically, may be referred to as a cooling liquid or a cooling gas. When the fluid contained in the thermal management component is cooling water, the thermal management component can also be called a water cooling plate, and the water cooling plate is in contact with the battery cells and can be used for reducing the temperature of the battery cells so as to prevent the battery cells Shan Tire from being out of control. At present, in order to avoid damage to a heat management component caused by external impact, the heat management component is deformed and broken to influence the heat management effect of the heat management component, a buffer piece is arranged between the heat management component and a box body.

Energy conservation and emission reduction are the key of sustainable development of the automobile industry, and for vehicles, the safety of batteries is of great importance. After the vehicle is used for a long time, the battery of the vehicle has a large thermal runaway risk. The inventor researches and discovers that the reason is that impact energy generated during the running process of a vehicle acts on a battery, and the buffer member in the conventional battery has high strength and cannot effectively absorb the impact, so that a thermal management component is damaged, the temperature of a battery cell cannot be effectively regulated, the risk of thermal runaway is increased, and the safety of the battery is influenced.

In view of the above, in order to prevent the thermal management from being damaged by the impact energy and ensure the safety of the battery, the inventors have conducted extensive studies to provide a battery in which a buffer member is provided with a crush portion configured to absorb the impact energy received by the battery by deforming, thereby reducing the impact of the impact energy on the thermal management portion.

The buffer piece is provided with the crumple part, so that external impact energy is absorbed in a deformation mode, the influence of the impact energy on the thermal management component is reduced, and the battery has high safety.

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

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the 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 particularly limit the above electric devices.

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

FIG. 1 is a schematic illustration of a vehicle 1000 according to some embodiments of the present disclosure.

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

Referring to fig. 2 to 4, fig. 2 is a schematic structural diagram of a battery 100 according to some embodiments of the present application, fig. 3 is a schematic structural diagram of a thermal management component 13 and a buffer 14 according to some embodiments of the present application, and fig. 4 is an exploded perspective view of the thermal management component 13 and the buffer 14 according to some embodiments of the present application.

The battery 100 includes a case 10, a battery cell 11, a thermal management member 13, and a buffer 14. The housing 10 includes a first wall 101. The battery cell 11 is accommodated in the case 10. A thermal management member 13 is accommodated in the case 10 to accommodate a medium to regulate the temperature of the battery cell 11. The buffer 14 is provided between the thermal management component 13 and the first wall 101. Wherein the cushion 14 is provided with a crushed portion 15, the crushed portion 15 being configured to absorb impact energy of the first wall 101 to the thermal management member 13 by deforming.

The case 10 is a member capable of accommodating the battery cells 11 to provide protection to the battery cells 11. The case 10 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc. Referring to fig. 2, the case 10 may include a first body 10a and a second body 10b, and the first body 10a and the second body 10b cover each other to define a receiving cavity, which may receive one, two, or more battery cells 11. The first body 10a may be a lower case of the cabinet 10, and the second body 10b may be a top cover of the cabinet 10.

The first wall 101 is a wall portion of the case 10, and the first wall 101 may be a bottom wall, a top wall, or a side wall of the case 10. In some embodiments, when the battery 100 is applied to the vehicle 1000, the first wall 101 may be a bottom wall of the box 10, and when the vehicle 1000 is running, the battery 100 is mainly impacted by the bottom of the vehicle 1000, i.e., the main impact energy is applied to the inside of the box 10 from the bottom wall of the box 10.

The thermal management member 13 is a member provided in the case 10, and may perform heat exchange with the battery cells 11 through a medium to control temperature; for example, the thermal management component 13 may be a component containing a fluid, and the thermal management component 13 may be configured to exchange heat with the battery cell 11 through the fluid to regulate the temperature of the battery cell 11, so as to ensure the safety of the battery cell 11. For example, the thermal management component 13 may be a water-cooled plate, and the fluid contained in the thermal management component is a cooling liquid, on one hand, heat generated by the battery cell 11 due to charging and discharging can be carried away by the cooling liquid with a temperature lower than that of the battery cell 11, and on the other hand, the thermal management component 13 may also be used to heat the battery cell 11 by the fluid with a temperature higher than that of the battery cell 11, which is not limited in the embodiment of the present application. In some embodiments, there is one thermal management component 13 corresponding to each battery cell 11, and in other embodiments, there is one thermal management component 13 corresponding to a plurality of battery cells 11, which is not limited in this application.

The buffer 14 is a member provided between the thermal management member 13 and the first wall 101. By providing the crush portion 15 in the cushion member 14, the strength of the cushion member 14 can be reduced, the ability of the cushion member 14 to deform when being subjected to a force can be improved, and the risk that the cushion member 14 cannot deform when being subjected to an impact due to high strength is reduced, and thus impact energy is transmitted to the thermal management member 13. In some embodiments, the buffers 14 correspond to the thermal management components 13 one to one, and the projection of the buffers 14 on the first wall 101 can cover the projection of the thermal management components 13 on the first wall 101, so that the protection effect on the thermal management components 13 can be ensured.

In the above configuration, by providing the crush portion 15, the structural strength of the cushion member 14 can be effectively reduced, and the energy absorption effect of the cushion member 14 can be improved. When an external force acts on the first wall 101, the impact energy transferred from the first wall 101 to the inside of the case 10 acts on the buffer 14, so that the crumple section 15 deforms to absorb the impact energy, the influence of the impact energy on the thermal management component 13 is reduced, the thermal management component 13 is ensured to be capable of effectively regulating the temperature of the battery cell 11, the risk of thermal runaway of the battery cell 11 is reduced, and the safety of the battery 100 is further ensured.

Referring to fig. 5, fig. 5 is a top view of the buffer 14 according to some embodiments of the present application. The cushion member 14 has a first surface 140 and a second surface 141 opposed to each other in the thickness direction, and the first surface 140 is connected to the thermal management member 13. The crush portion 15 includes a first hole 150 formed in the first face 140.

The buffer 14 may have a plate shape and the first face 140 may completely abut the surface of the thermal management component 13 facing the first wall 101. The first hole 150 is a hole structure formed on the first surface 140, and can effectively reduce the structural strength of the buffer 14 and improve the buffering capacity of the buffer 14.

In the above embodiment, the crumple section 15 includes the first hole 150 formed on the first surface 140, so as to effectively reduce the structural strength of the cushion 14 and improve the buffering effect of the cushion 14. The impact energy of the first wall 101 to the thermal management component 13 can make the first hole 150 collapse and deform, thereby reducing the impact energy on the thermal management component 13 and ensuring the thermal management efficiency of the thermal management component 13 to the battery cell 11.

In other embodiments, the crumple section 15 can include a cavity formed inside the buffer 14, i.e., the buffer 14 has a hollow structure, and the middle of the buffer 14 has a vacuum shape, so that when the buffer is subjected to impact energy, the surface of the buffer 14 can be quickly deformed inward to absorb the impact. In other embodiments, the crumple section 15 may include a cavity formed inside the buffer 14 and a support member disposed in the cavity, that is, the buffer 14 is a hollow structure, the middle of the buffer 14 is vacuum-shaped, and the plurality of support members are formed inside the buffer 14, so that when the buffer is subjected to impact energy, the surface of the buffer 14 can be rapidly deformed inward, and the support members are deformed, thereby absorbing the impact. Meanwhile, the supporting part is arranged, so that the supporting requirement of the buffer part can be met.

According to some embodiments of the present application, as shown in fig. 5, the number of the first holes 150 is plural, and the plural first holes 150 are uniformly and alternately arranged along the length direction and the width direction of the buffer 14.

In some embodiments, the cross-section of the buffer 14 may be rectangular (i.e., the buffer 14 may be cuboid), which buffer 14 may accommodate the thermal management component 13 in the shape of a cuboid. In some embodiments, the plurality of first holes 150 can be uniformly spaced along the length direction and the width direction of the buffer 14, so that the buffer 14 can be uniformly stressed and deformed when receiving impact energy.

In the above scheme, through setting up a plurality of first holes 150 to further reduce the structural strength of bolster 14, improve the buffering effect of bolster 14, when receiving impact energy, bolster 14 can be fast, fully deformed, so as to absorb impact energy effectively, guarantee that thermal management part 13 is not influenced.

In other embodiments, the buffer 14 may be circular to accommodate a circular thermal management component 13 (circular in cross-section). In some such embodiments, the first plurality of holes 150 are evenly spaced about the central axis of the bumper 14.

Referring to fig. 6, fig. 6 is a bottom view of the buffer 14 according to some embodiments of the present application. The crush portion 15 further includes a second hole 151 formed in the second face 141.

The second hole 151 is a hole structure formed on the second surface 141, and can reduce the structural strength of the buffer 14, so that the buffer 14 is deformed to absorb impact energy when being impacted.

In the above-described embodiment, the second holes 151 are formed in the second surface 141, so that the cushioning effect of the cushion material 14 can be further improved, and when impact energy acts on the cushion material 14, the second holes 151 can be deformed by collapsing, thereby absorbing the impact energy and reducing the influence on the heat management member 13.

According to some embodiments of the present application, please refer to fig. 7, and fig. 7 is a schematic view illustrating an internal structure of the buffer 14 according to some embodiments of the present application. The first hole 150 and/or the second hole 151 are blind holes.

"first hole 150 and/or second hole 151 are blind holes," meaning that in some embodiments, first hole 150 is a blind hole; in some embodiments, second hole 151 is a blind hole; in some embodiments, first bore 150 and second bore 151 are both blind bores.

When the first hole 150 is a blind hole, one end of the first hole 150 penetrates the first surface, and the other end of the first hole 150 does not penetrate the second surface. When the second hole 151 is a blind hole, one end of the second hole 151 penetrates the second surface, and the other end of the second hole 151 does not penetrate the first surface.

In some embodiments, the buffer 14 may be made of plastic, such as polypropylene (PP) or Polycarbonate (PC), and has a good buffering capacity, a low cost and a low density. In some embodiments, the first hole 150 and/or the second hole 151 can be easily formed in the buffer 14 by forming a blind hole through a plastic suction process (the principle is to form a blind hole by vacuum-absorbing a flat plastic hard sheet on the surface of a mold after heating the hard sheet to be soft and cooling the hard sheet).

In the above scheme, the buffer 14 may be made of a plastic material, and the first hole 150 or the second hole 151 may be quickly formed on the first surface 140 and/or the second surface 141 by a plastic suction process.

According to some embodiments of the present application, as shown in fig. 6, the number of the second holes 151 is plural, and the plural second holes 151 are uniformly and alternately arranged along the length direction and the width direction of the buffer 14.

In some embodiments, the buffer 14 may be square, and the square buffer 14 may accommodate the square thermal management component 13. In some embodiments, the plurality of second holes 151 can be uniformly spaced along the length direction and the width direction of the buffer 14, so that the buffer 14 can be uniformly stressed and deformed when receiving impact energy.

In the above scheme, through setting up a plurality of second holes 151 to further reduce the structural strength of bolster 14, improve the buffering effect of bolster 14, when receiving impact energy, bolster 14 can be fast, fully deformed, so as to absorb impact energy effectively, guarantee that thermal management part 13 is not influenced.

In other embodiments, the buffer 14 may be circular to accommodate a circular thermal management component 13 (circular in cross-section). In some such embodiments, the plurality of second holes 151 are evenly spaced about the central axis of the buffer 14.

According to some embodiments of the present application, please refer to fig. 7, a projection of the second hole 151 on the first surface 140 does not overlap with the first hole 150.

The expression "the projection of the second hole 151 on the first surface 140 does not overlap with the first hole 150" may mean that the second hole 151 and the first hole 150 are disposed in a staggered manner, and are independent from each other and do not interfere with each other.

In the above-described embodiment, the second hole 151 and the first hole 150 are disposed in a staggered manner, so that the structural strength of the cushion member 14 can be reduced as much as possible, and the cushion effect can be improved.

According to some embodiments of the present application, the second holes 151 are located between two adjacent first holes 150.

"the second hole 151 is located between two adjacent first holes 150", which may mean that there is one second hole 151 between two adjacent first holes 150, and there is one first hole 150 before two adjacent second holes 151. That is, it can be said that the first holes 150 and the second holes 151 are arranged to be staggered with each other.

In the above solution, the first holes 150 and the second holes 151 are arranged in a staggered manner, so as to fully utilize the first surface 140 and the second surface 141 of the buffer 14, and increase the volume ratio of the crumple section 15 to the buffer 14 as much as possible, so as to improve the buffering effect of the buffer 14 as much as possible.

According to some embodiments of the present application, please refer to FIG. 7, the wall thickness between the second hole 151 and the adjacent first hole 150 is D, which satisfies 0.5mm ≦ D ≦ 2mm.

The wall thickness D between the second hole 151 and the adjacent first hole 150 may be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 1mm, 1.1mm, 1.2mm … 1.8.8 mm, 1.9mm, or 2mm.

In the above scheme, when the wall thickness D is less than 0.5mm, the structural strength of the buffer 14 is weak, and the first hole 150 and the second hole 151 are not easily formed (the smaller the wall thickness is, the higher the requirement on the processing accuracy of the first hole 150 and the second hole 151 is); when the wall thickness D is larger than 2mm, the buffer capacity of the buffer part 14 is weaker, for this reason, in the embodiment of the application, the wall thickness D is limited to be not less than 0.5mm and not more than 2mm, and the buffer part 14 has better buffer capacity while ensuring the structural strength so as to effectively absorb larger impact capacity and ensure the safety of the heat management part 13.

According to some embodiments of the present application, in conjunction with FIG. 7, the thickness of the buffer 14 is H, satisfying 5mm ≦ H ≦ 20mm.

The thickness of the buffer 14 may refer to the dimension of the buffer 14 in the direction from the first wall 101 to the thermal management component 13. The thickness H of the buffer 14 may be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm … mm, 16mm, 17mm, 18mm, 19mm, or 20mm.

In the above-mentioned scheme, thickness when bolster 14 < 5mm, the buffering effect of bolster 14 is relatively poor, thickness when bolster 14 > 20mm, can sacrifice battery 100's inner space, reduces battery 100's energy density, and for this reason in this application embodiment, the restriction of bolster 14's thickness H is 5mm and is less than or equal to H and is less than or equal to 20mm for battery 100 has higher energy density when guaranteeing buffering effect.

Referring to fig. 8, fig. 8 is a schematic view of a thermal management component 13 according to some embodiments of the present application. The thermal management component 13 comprises a first part 130 and a second part 131 that are fitted to each other, between which first part 130 and second part 131 a flow channel 132 is formed for accommodating a medium.

The first portion 130 is farther from the buffer member 14 than the second portion 131, the first portion 130 is connected to the battery cell 11, the second portion 131 is connected to the buffer member 14, and the thermal conductivity of the second portion 131 is smaller than that of the first portion 130.

The first portion 130 and the second portion 131 are closed over each other to form an enclosure capable of containing a medium.

The first portion 130 is in contact with the battery cell 11 to effect heat exchange between the surface temperature of the battery cell 11 and the medium in the thermal management member 13. The first portion 130 has a large thermal conductivity to effectively transfer heat from the surface of the battery cell 11 to the medium or to effectively transfer heat from the medium to the battery cell 11.

The second portion 131 is a portion of the thermal management component 13 away from the battery cell 11, and the second portion 131 has a small thermal conductivity coefficient, and has a heat preservation effect, so that heat exchange between the medium and heat outside the battery 100 is reduced.

In the above scheme, the thermal conductivity of the second portion 131 is smaller than the thermal conductivity of the first portion 130, so that the energy for heat exchange between the thermal management component 13 and the outside can be reduced, the energy loss of the thermal management component 13 is reduced, that is, more energy can act on the battery cell 11, and the temperature of the battery cell 11 can be effectively adjusted.

According to some embodiments of the present application, the first portion 130 is a metal member and the second portion 131 is a plastic member, a plastic-based composite material member, or an inorganic non-metallic material member.

The first portion 130 may be made of a metal material such as aluminum, aluminum alloy, copper, or copper alloy. The second portion 131 may be made of a material with a relatively low thermal conductivity, such as a plastic member, a plastic-based composite material member, or an inorganic non-metallic material.

In the above solution, the first portion 130 is a metal member, and can effectively exchange heat between the medium in the thermal management component 13 and the battery cell 11; the second part 131 is a plastic part, a plastic-based composite material part or an inorganic non-metallic material part, and has good heat preservation capability. Meanwhile, the second portion 131 is a plastic part, a plastic-based composite material part, or an inorganic non-metallic material part, which has a lower cost and a lower density than metals, so that the manufacturing cost and weight of the thermal management component 13 can be reduced.

According to some embodiments of the present application, the buffer 14 is a plastic member, and the second portion 131 is welded to the buffer 14.

In some embodiments, the buffer 14 is a plastic part, the second portion 131 is a plastic part, a plastic-based composite material part, or an inorganic non-metallic material part, and the buffer 14 and the second portion 131 can be welded by hot plate welding to achieve the connection between the thermal management component 13 and the buffer 14.

In some embodiments, the first portion 130 and the second portion 131 may be adhesively attached.

In the above embodiment, when the buffer 14 is made of plastic, the buffer 14 can be easily welded to the second portion 131.

According to some embodiments of the present application, please refer to fig. 8 and 9, fig. 9 is a schematic diagram of the second portion 131 in some embodiments of the present application. The surface of the second portion 131 facing the first portion 130 is formed with a groove 1310, and the first portion 130 covers the groove 1310 to form the flow channel 132.

The groove 1310 is a groove structure formed on the second portion 131 facing the first portion 130, and when the first portion 130 covers the second portion 131, the first portion 130 can cover the groove 1310 to form the flow channel 132 capable of passing a medium.

Referring to fig. 9, on the surface of the second portion 131, a groove 1310 may be provided in a winding shape. Referring to fig. 8, two through holes 1301 may be formed on the surface of the first portion 130, and the two through holes 1301 can communicate with the flow passage 132 to serve as a medium inlet and a medium outlet of the thermal management member 13, respectively. Media can enter the channel 132 from the media inlet and exit the channel 132 from the media outlet.

In the above scheme, since the second portion 131 is a plastic part, a plastic-based composite material part, or an inorganic non-metallic material part, the groove 1310 can be conveniently formed on the surface thereof, so as to reduce the manufacturing cost of the thermal management component 13 and improve the manufacturing efficiency of the thermal management component 13.

According to some embodiments of the present application, the present application further provides a powered device, the powered device comprising the above-described battery 100, the battery 100 being configured to provide electrical energy.

According to some embodiments of the present application, a battery 100 is provided, and referring to fig. 2 to 9, the battery 100 includes a case 10, a battery cell 11, a thermal management component 13, and a buffer 14.

The case 10 includes a first wall 101, and the first wall 101 is a bottom wall of the case 10. The battery cell 11, the thermal management component 13 and the buffer 14 are arranged in the box body 10, the buffer 14 is arranged between the thermal management component 13 and the first wall 101, and the battery cell 11 is arranged on the surface of the thermal management component 13, which is far away from the buffer 14.

The thermal management component 13 comprises a first part 130 and a second part 131 that are fitted to each other, between which first part 130 and second part 131 a flow channel 132 is formed for accommodating a medium. The first portion 130 is connected to the battery cell 11, and the first portion 130 is a metal member having a relatively high thermal conductivity and a relatively good thermal conductivity. The second portion 131 is connected with the buffer 14, the second portion 131 is made of a non-metal material or a composite material, for example, the second portion 131 is an injection-molded PP plate or a thermosetting material molded plate, and the second portion 131 has a small thermal conductivity and a good heat-insulating property. A recess 1310 may be formed in the surface of the second portion 131 facing the first portion 130 to form the flow channel 132 for the medium to flow when the first portion 130 is covered and bonded to the second portion 131. The media flows into the thermal management component 13 from the media inlet of the first portion 130 and out of the media outlet of the first portion 130.

The buffer member 14 is a buffer plate made of thermoplastic, such as PP, PC, etc., and has the characteristics of low strength and good toughness, and the buffer member 14 is welded to the second portion 131 of the thermal management member 13 by hot plate welding. The thickness H of the buffer 14 is 5-20mm. The cushion 14 is provided with the crumple section 15, the crumple section 15 includes a plurality of first holes 150 and a plurality of second holes 151 formed on the cushion 14 by a plastic suction process, and the first holes 150 and the second holes 151 are blind holes. The first holes 150 are uniformly disposed on the first surface of the buffer 14, and the second holes 151 are uniformly disposed on the second surface of the buffer 14. The first holes 150 and the second holes 151 are alternately arranged in a staggered manner, and the wall thickness D between each second hole 151 and the adjacent first hole 150 is 0.5mm-2mm.

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

Claims

1. A battery, comprising:

a case comprising a first wall;

the battery monomer is accommodated in the box body;

the thermal management component is accommodated in the box body and used for accommodating media to adjust the temperature of the battery cells;

a buffer disposed between the thermal management component and the first wall;

wherein the buffer is provided with a crush portion configured to absorb impact energy of the first wall on the thermal management component by deforming.

2. The battery according to claim 1,

the buffer piece is provided with a first surface and a second surface which are opposite in the thickness direction, and the first surface is connected with the thermal management component;

the crush portion includes a first hole formed in the first face.

3. The battery according to claim 2,

the number of the first holes is multiple, and the first holes are uniformly and alternately arranged along the length direction and the width direction of the buffer piece.

4. The battery according to claim 3,

the crush portion further includes a second aperture formed in the second face.

5. The battery according to claim 4,

the first hole and/or the second hole are/is a blind hole.

6. The battery according to claim 4,

the quantity of second hole is a plurality of, and is a plurality of the second hole is followed length direction and the width direction of bolster are even and interval ground is arranged.

7. The battery according to claim 6,

the projection of the second aperture on the first face does not overlap the first aperture.

8. The battery according to claim 7,

the second hole is positioned between two adjacent first holes.

9. The battery according to claim 8,

the wall thickness between the second hole and the adjacent first hole is D, and D is more than or equal to 0.5mm and less than or equal to 2mm.

10. The battery according to claim 1,

the thickness of the buffer piece is H, and H is more than or equal to 5mm and less than or equal to 20mm.

11. The battery according to any one of claims 1 to 10,

the heat management component comprises a first part and a second part which are mutually covered, and a flow passage is formed between the first part and the second part and is used for accommodating a medium;

the first portion than the second portion is farther away from the bolster, the first portion with the battery monomer is connected, the second portion with the bolster is connected, the coefficient of heat conductivity of second portion is less than the coefficient of heat conductivity of first portion.

12. The battery according to claim 11,

the first part is a metal piece, and the second part is a plastic piece, a plastic-based composite material piece or an inorganic non-metallic material piece.

13. The battery according to claim 12,

the buffer piece is a plastic piece, and the second part is welded with the buffer piece.

14. The battery according to claim 11,

the surface of the second part facing the first part is formed with a groove, and the first part covers the groove to form the flow channel.

15. An electrical device comprising a battery as claimed in any one of claims 1 to 14 for providing electrical energy.