CN217114537U

CN217114537U - Battery and power consumption device

Info

Publication number: CN217114537U
Application number: CN202220402615.7U
Authority: CN
Inventors: 曹根; 周严东; 黄银成; 沈圳
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-08-02
Anticipated expiration: 2032-02-25
Also published as: WO2023160111A1

Abstract

The application provides a battery and electric device, belongs to battery technical field. The battery includes: a battery cell; the cooling plate is internally provided with a cooling channel, the cooling plate is provided with at least two bending parts which are parallel to each other, the cooling plate is bent along the bending parts to form at least one U-shaped groove, and the U-shaped groove is used for accommodating the single battery; and the bent part is provided with a rigidity weakening structure so as to weaken the rigidity of the cooling plate at the bent part. Wherein, the rigidity weakening structure that sets up on the kink makes the rigidity intensity of kink position department reduce and be convenient for buckle, and then makes the cooling plate that has the U-shaped groove can form with whole board preparation, does benefit to when reducing the production technology degree of difficulty and improves production efficiency.

Description

Battery and power consumption device

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a battery and an electric device.

Background

With the rise of electric vehicles, batteries of electric vehicles become one of the important indicators for measuring vehicle performance. Since the battery is generally disposed inside the vehicle and the battery packs constituting the battery are densely arranged, the heat generated from the battery is severe. Particularly in the rapid charge state, the temperature of the battery may be higher.

In order to solve the heat dissipation problem of the battery, two main solutions of wind cooling and water cooling are provided at present. Because the heat dissipation efficiency of the water cooling method is higher, more and more electric automobiles tend to adopt the water cooling method to dissipate heat of the battery. However, the water cooling scheme of the battery in the prior art can cause the problem that the structure is complex and the difficulty of the production process is increased while the heat dissipation uniformity is improved.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the embodiments of the present application is to provide a battery and an electric device, so as to solve the technical problem that the water cooling scheme of the battery in the prior art increases the heat dissipation uniformity and at the same time causes a complex structure, which increases the difficulty of the production process.

In a first aspect, the present application provides a battery comprising: a battery cell; the cooling plate is internally provided with a cooling channel, the cooling plate is provided with at least two bending parts which are parallel to each other, the cooling plate is bent along the bending parts to form at least one U-shaped groove, and the U-shaped groove is used for accommodating the single battery; and the bent part is provided with a rigidity weakening structure so as to weaken the rigidity of the cooling plate at the bent part.

The battery heat management device comprises a battery monomer and a cooling plate, wherein a cooling channel is arranged inside the cooling plate, and the cooling channel is used for allowing a medium to pass through so as to realize the battery heat management function. And at least two bending parts which are parallel to each other are arranged on the cooling plate, so that the cooling plate can be bent along the bending parts to form at least one U-shaped groove, the U-shaped groove accommodates the single battery on one hand, and on the other hand, the cooling plate can be enabled to be in contact with more surfaces of the single battery on the other hand, correspondingly, media in the cooling channel can pass through more surfaces of the single battery, and the purpose of improving the heat dissipation uniformity of the single battery is finally achieved. Wherein, the rigidity that sets up weakens the structure on the kink makes the rigidity intensity of kink position department reduce and be convenient for buckle, and then makes the cooling plate that has the U-shaped groove can form with whole board preparation, does benefit to when reducing the production technology degree of difficulty when improving battery product overall structure intensity and improves production efficiency.

In some embodiments, the thickness of the bend is less than the thickness of the cooling plate to form the weakened rigid structure. The thickness of the position of the bent part on the cooling plate is reduced, so that the bent part is convenient to bend due to the fact that the rigidity strength of the position of the bent part is reduced, and the processing difficulty of the bent part is reduced.

In some embodiments, a first recess recessed toward a direction away from the single battery is disposed on a side of the bending portion close to the single battery to reduce a thickness of the bending portion. Based on the purpose that needs bending type becomes the U-shaped groove, the bending type that goes on the cooling plate has the direction restriction, through the setting of first depressed part, can be so that the bending portion on with the battery monomer one side that contacts form sunken reduction in thickness simultaneously to be convenient for bend type becomes the U-shaped groove.

In some embodiments, a hollow portion is disposed on the bending portion, and the hollow portion is disposed to penetrate along a thickness direction of the cooling plate to form the weakened rigid structure. The setting of fretwork portion on the kink can effectively reduce the rigidity intensity of kink position department and be convenient for buckle on the one hand, and on the other hand can also alleviate the weight of cooling plate and do benefit to the lightweight that improves whole battery product.

In some embodiments, the U-shaped groove comprises three faces connected in sequence, and the three faces are used for being attached to the battery cell; the cooling channel extends along the directions of the three surfaces in sequence and is arranged inside the cooling plate, and the cooling channel avoids the hollow part. The cooling channel arranged in this way can be arranged on all sides of the U-shaped groove and does not affect the hollow part.

In some embodiments, the number of the U-shaped grooves is multiple, and the opening directions of two adjacent U-shaped grooves are opposite. Through the arrangement, the cooling plate with the same size can be bent to form more U-shaped grooves as much as possible so as to accommodate more battery cells, and therefore the utilization rate of the cooling plate is improved.

In some embodiments, the battery cell includes a first output electrode and a second output electrode, which are disposed at both ends of the battery cell in an extending direction of the bent portion; wherein at least a portion of the first output pole and at least a portion of the second output pole each project from the U-shaped slot in the direction of extension. The first output pole and the second output pole are at least partially exposed out of the U-shaped groove, so that interference of the electric connecting piece and the U-shaped groove is avoided when the electric connecting piece is used for connecting the output stages of the battery units.

In some embodiments, an adhesive is disposed between the battery cell and the U-shaped groove to fix the battery cell. Compared with a mode of fixing by using a connecting piece, the battery monomer is fixed in the U-shaped groove in a bonding mode, so that the space utilization rate is effectively improved, the connection area between the battery monomer and the U-shaped groove is conveniently increased, and the overall strength of a battery product is further improved; meanwhile, the number of parts can be reduced, and the production complexity can be reduced.

In some embodiments, the battery further comprises an upper box body and a lower box body, a containing cavity is formed by enclosing the upper box body and the lower box body, and the cooling plate and the battery cell are contained in the containing cavity; the upper box body is provided with a second sunken part, the second sunken part is sunken towards the direction of the containing cavity, and the projection of the second sunken part and the U-shaped groove on the upper box body is at least partially overlapped. The concave direction of the second concave part faces the accommodating cavity, and the second concave part is at least partially overlapped with the projection of the U-shaped groove on the upper box body, so that the second concave part can be in contact with at least part of the battery monomer and/or at least part of the cooling plate, the heat dissipation area is increased, and the air heat exchange between the inner and outer sides is improved; meanwhile, the rigidity of the upper box body can be improved by the second sunken part, and the electric core is prevented from being flapped or abnormal sound is prevented from being produced by the upper box body.

In a second aspect, the present application provides an electric device, comprising a battery as in the above embodiments, the battery being used for providing electric energy.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

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

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

FIG. 3 is an enlarged view of the point A in FIG. 2;

FIG. 4 is a plan view of a cooling plate according to some embodiments of the present application;

FIG. 5 is an enlarged view of the point B in FIG. 4;

FIG. 6 is a perspective view of a cooling plate in some embodiments of the present application;

FIG. 7 is an enlarged view of the point C in FIG. 6;

FIG. 8 is a front view of a cooling plate in some embodiments of the present application;

FIG. 9 is an enlarged view of FIG. 8 at D;

fig. 10 is an exploded perspective view of a battery according to some embodiments of the present disclosure (including an upper case and a lower case).

The reference numbers in the detailed description are as follows:

1000-a vehicle;

1100-battery, 1200-controller, 1300-motor;

100-cell, 110-first output pole;

200-a cooling plate, 210-a cooling channel, 220-a bending part, 221-a first recess, 222-a hollow part, 230-a U-shaped groove, 231-an opening of the U-shaped groove, 232-a first face, 233-a second face, 234-a third face;

300-upper box, 310-second recess;

400-lower box.

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: a exists alone, A and B exist simultaneously, and B exists alone. 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; either directly or indirectly through intervening media, either internally or in any other relationship. 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.

As is well known, two key problems of electric vehicles are safety and endurance, and both of these problems are highlighted in power batteries. To improve endurance, batteries tend to be designed for higher energy densities; the charging time required to fully charge the battery is also increased as the energy density of the battery is increased. In order to shorten the battery charging time, rapid charging (hereinafter, simply referred to as rapid charging) has been carried out. However, although the problem of long battery charging time is solved by the quick charging, the heat generation amount of the tab of the battery cell during the quick charging is several times, dozens of times or even more than that of the tab of the battery cell in a common charging mode, and the heat generation problem of the battery is further aggravated based on the arrangement position of the battery in the electric vehicle.

At present, most of electric automobiles adopt an air cooling mode to dissipate heat of batteries, but the air cooling mode has low heat dissipation efficiency and uneven heat dissipation, and is difficult to prevent dust and drain, and particularly difficult to ensure the heat dissipation effect in hot weather. Therefore, more and more electric automobiles begin to adopt a water cooling method to dissipate heat of the battery.

The applicant has noticed that in the prior art, the cooling water solution for the battery needs to contact as many surfaces of the battery cells as possible through the cooling plate to improve the uniformity of heat dissipation, so that the complexity of the structure of the cooling plate is increased accordingly, and the difficulty of the production process is further increased. Specifically, in prior art to snakelike flat pipe be cooling channel, by a plurality of snakelike flat pipes arrange side by side for water cooling system, as a water cooling scheme, this has just involved the independent processing and the assembly work in later stage to each snakelike flat pipe, and the water cooling system structure under this kind of scheme is complicated and the wholeness is relatively poor, and production procedure is various, production efficiency is low. In order to improve the integrality of the water cooling system, the cooling plate in the form of a whole plate can be directly bent to be processed into a U-shaped groove, and the cooling plate is consistent in rigidity strength and internally provided with a water cooling pipeline, so that the cooling plate is processed in a bending mode with high difficulty.

In order to solve the problem that the cooling plate is not easy to bend, the applicant researches and discovers that a rigidity weakening structure can be arranged at the bent part on the cooling plate, so that the rigidity of the bent part is smaller than that of the position, except the bent part, on the cooling plate, the bent part is convenient to bend to form a U-shaped groove, and finally the aim of reducing the difficulty of the production process of a battery product and improving the production efficiency is fulfilled.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited to. The power supply system with the battery forming power utilization device disclosed by the application can be used, so that the water-cooling plate is convenient to bend, and the purpose of reducing the difficulty of the production process of a battery product and improving the production efficiency is facilitated.

The embodiment of the application provides an electricity utilization device which uses a battery to provide electric energy, and the electricity utilization device 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. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like. For convenience of description, the following embodiments take an example in which a power consuming apparatus according to an embodiment of the present application is a vehicle 1000.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application; fig. 2 is a perspective view of a battery provided in some embodiments of the present application; FIG. 3 is an enlarged view of the point A in FIG. 2; FIG. 4 is a plan view of a cooling plate according to some embodiments of the present application; FIG. 5 is an enlarged view of the point B in FIG. 4; FIG. 6 is a perspective view of a cooling plate in accordance with certain embodiments of the present application; FIG. 7 is an enlarged view of the point C in FIG. 6; FIG. 8 is a front view of a cooling plate in some embodiments of the present application; FIG. 9 is an enlarged view of FIG. 8 at D; fig. 10 is an exploded perspective view of a battery according to some embodiments of the present disclosure (including an upper case and a lower case).

Referring to fig. 1, a vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The interior of the vehicle 1000 is provided with a battery 1100, and the battery 1100 may be provided at the bottom or at the head or tail of the vehicle 1000. The battery 1100 may be used for power supply of the vehicle 1000, and for example, the battery 1100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 1200 and a motor 1300, the controller 1200 being configured to control the battery 1100 to power the motor 1300, for example, for start-up, navigation, and operational power requirements while traveling of the vehicle 1000.

In some embodiments, the battery 1100 may serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, instead of or in part instead of fuel or natural gas, to provide driving power for the vehicle 1000.

With continuing reference to fig. 1, and with further reference to fig. 2 and 3, a battery 1100 includes, in accordance with some embodiments of the present application: a battery cell 100; a cooling plate 200, wherein a cooling channel 210 is arranged inside the cooling plate 200 (because the cooling channel 210 is inside the cooling plate 200 and is not easy to be illustrated from the outside, the illustration is directed to the position of the cooling channel 210), at least two bending parts 220 which are parallel to each other are arranged on the cooling plate 200, the cooling plate 200 is bent along the bending parts 220 to form at least one U-shaped groove 230, and the U-shaped groove 230 is used for accommodating the battery cell 100; wherein the bent portion 220 is provided with a rigidity weakening structure to weaken the rigidity of the cooling plate 200 at the bent portion 220.

It should be noted that the battery 1100 disclosed in the embodiment of the present application may be applied not only to energy storage power systems such as hydraulic power, thermal power, wind power, and solar power stations, but also to electric vehicles such as electric bicycles, electric motorcycles, and electric automobiles, and to a plurality of fields such as military equipment and aerospace, and is not limited specifically herein.

Among them, the battery cell 100 is the smallest unit that embodies the conversion of electrical energy and chemical energy. The battery cell 100 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 100 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Specifically, the material of the cooling plate 200 may be aluminum or other materials with good thermal conductivity, which is not limited herein. More specifically, the cooling channels 210 provided inside the cooling plate 200 have the following two embodiments: in the first embodiment, the cooling channels 210 are disposed between two adjacent bent portions 220, and a plurality of cooling channels 210 may be disposed to fill the entire cooling plate 200, or only one cooling channel 210 may be disposed to sequentially fill the entire cooling plate 200 in a serpentine shape. Secondly, the cooling channels 210 sequentially pass through the bending portions 220, a wider cooling channel 210 may be provided to fill the whole cooling plate 200, that is, the whole cooling plate 200 is a hollow structure, or a plurality of cooling channels 210 may be provided to fill the whole cooling plate 200 in a parallel arrangement. The cooling channel 210 extends from one end to the other end of the cooling plate 200, and heat generated in the temperature rising process of the battery cell 100 can be taken away by the cooling medium along the flowing direction, so that the problem of over-high temperature rise during the operation of the battery is effectively solved.

In addition, in the case where only one U-shaped groove 230 is required, only two bent portions 220 parallel to each other need to be provided on the cooling plate 200; in the case where more U-shaped grooves 230 are required, more bent portions 220 need to be provided on the cooling plate 200. It can be seen that the number of the bent portions 220 provided on the cooling plate 200 is positively correlated with the number of the U-shaped grooves 230 to be bent. Further, the number of the U-shaped grooves 230 to be bent is related to the number of the battery cells 100 (i.e., the energy density of the battery), and in order to ensure better heat dissipation uniformity, the number of the U-shaped grooves 230 is increased while the number of the battery cells 100 is increased. One battery cell 100 or a plurality of battery cells 100 may be placed in one U-shaped groove 230.

The battery 1100 of the embodiment of the application includes the battery cell 100 and the cooling plate 200, the cooling channel 210 is arranged inside the cooling plate 200, the cooling channel 210 is used for allowing a medium to pass through, and the battery thermal management function is realized by cooling or heating the medium in the cooling channel 210. Moreover, at least two bending parts 220 parallel to each other are arranged on the cooling plate 200, so that the cooling plate 200 can be bent along the bending parts 220 to form at least one U-shaped groove 230, the U-shaped groove 230 accommodates the battery cell 100 on one hand, and on the other hand, the cooling plate 200 can be made to contact more surfaces of the battery cell 100, accordingly, the medium in the cooling channel 210 can pass through more surfaces of the battery cell 100, and finally, the purpose of improving the heat dissipation uniformity of the battery cell 100 is achieved. Wherein, the rigidity that sets up weakens the structure on the kink 220 makes the rigidity intensity of kink 220 position department reduce and be convenient for buckle, and then makes the cooling plate 200 that has U-shaped groove 230 can form with whole board preparation, compare in the preparation mode that adopts the concatenation to cooling plate 200 among the prior art, on the one hand can reduce the production technology degree of difficulty and do benefit to when improving production efficiency, on the other hand because cooling plate 200 does not have the concatenation seam by whole board preparation, so still improve the torsional rigidity of cooling plate 200 at horizontal plane and perpendicular simultaneously, and then improve battery system overall structure intensity.

In some embodiments, the thickness of the bent portion 220 is less than the thickness of the cooling plate 200 to form a rigid weakened structure. Specifically, the thickness of the bent portion 220 may be reduced by performing thinning on both front and back side surfaces in a direction perpendicular to the cooling plate 200, and for example, the thinning may be performed on either one side surface or both side surfaces of the cooling plate 200. The thickness of the bent portion 220 on the cooling plate 200 is reduced to reduce the rigidity of the bent portion 220, so that the bent portion 220 is easy to bend, and the processing difficulty of the bent portion 220 is reduced. In addition, the angle of the cooling plate 200 after being bent along the bent portion 220 may be adjustable, and the bent angle may be 90 ° in order to achieve three-sided water cooling of the battery.

It is understood that forming the U-shaped groove 230 imposes a limitation on the bending direction of the cooling plate 200. In view of the above, in some embodiments, referring to fig. 4 and 5, the first recess 221 recessed in a direction away from the single battery 100 is disposed on a side of the bent portion 220 close to the single battery 100, so as to reduce the thickness of the bent portion 220. Through the arrangement of the first recess 221, the thickness of the bent portion 220 can be reduced while forming a recess on the side contacting the battery cell 100, thereby facilitating the bending formation of the U-shaped groove 230. The first concave portion 221 may have a concave shape such as a circular arc, a semicircular shape, or even a triangular shape, which is not limited herein.

In some embodiments, referring to fig. 6 and 7, a hollow portion 222 is disposed on the bending portion 220, and the hollow portion 222 is disposed through the cooling plate 200 in a thickness direction thereof to form a rigid weakening structure.

The number of the hollow portions 222 disposed on the bending portion 220 is not limited, and one or more hollow portions 222 may be disposed on one bending portion 220. When only one hollow portion 222 is disposed on the bending portion 220, the hollow portion 222 may be disposed at the middle position of the bending portion 220 to reduce the strength of the middle position of the bending portion 220 for facilitating bending. A hollow portion 222 can be optionally disposed at any position on the bending portion 220; when the bending portion 220 is provided with a plurality of hollow portions 222, the plurality of hollow portions 222 can be uniformly distributed on the bending portion 220 (i.e. the distance between two adjacent hollow portions 222 is fixed), so as to balance the strength of all positions on the whole bending portion 220. Of course, the plurality of hollow portions 222 may be randomly distributed on the bending portion 220 (i.e., the distance between two adjacent hollow portions 222 is not fixed), and the distribution manner of the hollow portions 222 is not specifically limited herein. The shape of the hollow portion 222 includes, but is not limited to, a square, a rectangle, a diamond, a circle, an oval, and the like. The plurality of hollow portions 222 may have the same shape or different shapes.

The arrangement of the hollow portion 222 on the bending portion 220 can effectively reduce the rigidity of the position of the bending portion 220 for facilitating bending, and can also reduce the weight of the cooling plate 200 for improving the light weight of the whole battery product.

In some embodiments, as shown in fig. 8 and 9, the U-shaped groove 230 includes three surfaces (a first surface 232, a second surface 233, and a third surface 234) connected in series, and the three surfaces are used to be attached to the battery cell 100, and when a cooling medium enters the cooling plate 200, the cooling medium takes internal heat of the battery cell 100 through the cooling channel 210. The cooling channel 210 is extended in the direction sequentially passing through the three surfaces and disposed inside the cooling plate 200, and the cooling channel 210 avoids the hollow portion 222.

When the number of the battery cells 100 is large, a plurality of battery cells 100 may be packaged in the form of a battery module to improve the integrity of the battery system. Each battery module includes a plurality of battery cells 100, and the plurality of battery cells 100 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plurality of battery cells 100. The battery modules can be multiple, and the multiple battery modules can be connected in series or in parallel or in series-parallel, wherein the series-parallel refers to the series connection or the parallel connection of the multiple battery modules. The cooling plate 200 can be bent to form one or more U-shaped grooves 230 according to the design of the number of the battery modules, and the cooling channel 210 thus formed can pass through all the surfaces of the U-shaped grooves 230 without affecting the hollow-out portion 222, so as to realize water cooling on three surfaces of the battery.

Note that a plurality of battery cells 100 may be provided in each U-shaped groove 230 in both the extending direction of the bent portion 220 (i.e., the longitudinal direction of the U-shaped groove 230) and the direction penetrating the U-shaped groove 230 (i.e., the width direction of the U-shaped groove 230). However, in order to ensure a good heat dissipation effect, in some embodiments, 1 to 3 battery cells 100 are placed in the width direction of each U-shaped groove 230, and specifically, 1 to 3 battery cells 100 are disposed in the U-shaped groove 230 in a manner that the large surfaces of the battery cells 100 are attached to each other. In the embodiment, 2 battery cells 100 are placed, so that three surfaces of the U-shaped groove 230 are in contact with three surfaces of the 2 rows of battery cells 100, thereby achieving three-surface water cooling of the battery and solving the problem of over-high temperature of the conventional battery system.

With continued reference to FIG. 8, when multiple U-shaped slots 230 are desired, in some embodiments, the multiple U-shaped slots 230 may be formed in the cooling plate 200 by bending in a staggered pattern, i.e., with the openings 231 of two adjacent U-shaped slots in opposite directions. With the above arrangement, the cooling plate 200 of the same size can be bent to form a larger number of U-shaped grooves 230 as much as possible to accommodate a larger number of battery cells 100, thereby improving the utilization rate of the cooling plate 200. In other embodiments, the plurality of U-shaped grooves 230 may also be formed on the cooling plate 200 by bending in a sequential arrangement manner, that is, the openings 231 of the plurality of U-shaped grooves are aligned, and a transition region is formed between two adjacent U-shaped grooves 230, and the transition region is not used for disposing the battery cell 100.

In some embodiments, with continued reference to fig. 2, the battery cell 100 includes a first output electrode 110 and a second output electrode (not shown in the figures for viewing angle reasons), the first output electrode 110 and the second output electrode being disposed at both ends of the battery cell 100 along the extending direction of the bending part 220; wherein at least a portion of the first output pole 110 and at least a portion of the second output pole both project from the U-shaped slot 230 in the direction of extension.

By providing that at least a portion of the first and

second output poles

110 and 230 protrude from the U-shaped groove 230, interference of the electrical connection members with the U-shaped groove 230 is prevented when the output stages of the respective battery cells 100 are connected using the electrical connection members (not shown). Moreover, after the cooling plate realizes water cooling of three sides of the battery cell 100, the cooling plate approaches more sides of the battery cell 100, and the cooling medium passes through the cooling channel 210, so that heat of the battery cell 100 can be rapidly taken away, the temperature of the battery cell 100 cannot be too high, and the temperature of the electrical connector connected with the battery cell 100 cannot be too high. The electrical connector is used to electrically connect a plurality of battery modules, and thus a plurality of battery cells 100 in a battery module. The electrical connection may in particular be a bus bar component.

There are various ways of fixing the battery cell 100 in the U-shaped groove 230, such as bonding, riveting, welding, and fixing by a connector. In some embodiments, the battery cell 100 may be fixed in the U-shaped groove 230 of the cooling plate 200 by applying an adhesive to the contact surface of the battery cell 100 and the U-shaped groove 230.

Alternatively, the adhesive may be a structural adhesive, a thermal conductive adhesive, or the like, wherein the structural adhesive has high strength, and the thermal conductive adhesive facilitates heat exchange. Compared with a mode of fixing by using a connecting piece, the battery monomer 100 is fixed in the U-shaped groove 230 in a bonding mode, so that the space utilization rate is effectively improved, the connection area between the battery monomer 100 and the U-shaped groove 230 is increased conveniently, and the overall strength of a battery product is improved; meanwhile, the number of parts can be reduced, and the production complexity can be reduced.

In some embodiments, the battery 1100 further includes a battery box for providing a receiving space for the battery cells 100 and the cooling plate 200, and the battery box may take various structures. Referring to fig. 10, the battery box specifically includes an upper box 300 and a lower box 400, a receiving cavity is defined between the upper box 300 and the lower box 400, and the cooling plate 200 and the battery cell 100 are received in the receiving cavity. The upper case 300 is provided with a second concave portion 310, the second concave portion 310 is concave toward the accommodating cavity, and the projection of the second concave portion 310 and the U-shaped groove 230 on the upper case 300 at least partially overlap.

In other embodiments, the battery box includes an upper box and a lower box, and in one embodiment, the upper box 300 and the lower box 400 cover each other, and the upper box 300 and the lower box 400 together define a receiving space. In another embodiment, the lower case 400 may have a hollow structure with one open end, the upper case 300 may have a plate-shaped structure, and the upper case 300 covers the open side of the lower case 400, such that the upper case 300 and the lower case 400 together define a receiving space. In another embodiment, the upper case 300 and the lower case 400 may be both hollow structures with one side open, and the open side of the upper case 300 may be covered with the open side of the lower case 400. Note that, the second recess 310 may be provided in either the upper case 300 or the lower case 400, or the second recess 310 may be provided in both the upper case 300 and the lower case 400, according to actual requirements. Of course, the battery case formed by the upper case 300 and the lower case 400 may have various shapes, for example, a cylindrical body, a rectangular parallelepiped, and the like.

Since the depression direction of the second depression part 310 faces the accommodating cavity, and the second depression part 310 at least partially coincides with the projection of the U-shaped groove 230 on the upper case 300, the second depression part can be in contact with at least part of the battery cell 100 and/or at least part of the cooling plate 200, so that the heat dissipation area is increased, and the heat exchange between the inside air and the outside air is improved; meanwhile, the second recess 310 may also improve the rigidity of the upper case 300, and prevent the upper case 300 from slapping the battery cell or generating abnormal sound. In other embodiments, the second concave portion 310 may be completely overlapped with the projection of the U-shaped groove 230 on the upper case 300, so as to further improve the heat dissipation effect. In addition, the lower case 400 bears the weight of the whole battery product, and can be manufactured by bending and welding a sheet metal part, or stamping and welding the sheet metal part, or casting aluminum alloy, or die casting aluminum alloy, and the like.

The embodiment of the present application further provides an electric device, which includes the battery 1100 as in the above embodiments, and the battery 1100 is used for providing electric energy.

It is understood that the powered device can be, but is not limited to, a cell phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a boat, a spacecraft, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A battery, comprising:

a battery cell;

the cooling plate is internally provided with a cooling channel, the cooling plate is provided with at least two bending parts which are parallel to each other, the cooling plate is bent along the bending parts to form at least one U-shaped groove, and the U-shaped groove is used for accommodating the single battery;

and the bent part is provided with a rigidity weakening structure so as to weaken the rigidity of the cooling plate at the bent part.

2. The battery according to claim 1, wherein the bent portion has a thickness smaller than that of the cooling plate to form the weakened structure.

3. The battery according to claim 2, wherein a first recess recessed toward a direction away from the battery cell is disposed on a side of the bent portion close to the battery cell to reduce a thickness of the bent portion.

4. The battery according to claim 1 or 2, wherein a hollowed-out portion is provided on the bent portion, and the hollowed-out portion is provided to penetrate in a thickness direction of the cooling plate to form the weakened structure.

5. The battery of claim 4, wherein the U-shaped groove comprises three faces connected in sequence, and the three faces are used for being attached to the battery cell;

the cooling channel extends along the directions of the three surfaces in sequence and is arranged inside the cooling plate, and the cooling channel avoids the hollow part.

6. The battery according to claim 1, wherein the number of the U-shaped grooves is plural, and the opening directions of two adjacent U-shaped grooves are opposite.

7. The battery according to claim 1, wherein the battery cell comprises a first output electrode and a second output electrode, and the first output electrode and the second output electrode are disposed at two ends of the battery cell in the extending direction of the bent portion;

wherein at least a portion of the first output pole and at least a portion of the second output pole each project from the U-shaped slot in the direction of extension.

8. The battery of claim 1, wherein an adhesive is disposed between the battery cell and the U-shaped groove to secure the battery cell.

9. The battery of claim 1, further comprising an upper case and a lower case, wherein a containing cavity is defined between the upper case and the lower case, and the cooling plate and the battery cell are contained in the containing cavity;

the upper box body is provided with a second sunken part, the second sunken part is sunken towards the direction of the containing cavity, and the projection of the second sunken part and the U-shaped groove on the upper box body is at least partially overlapped.

10. An electric device comprising a battery as claimed in any one of claims 1 to 9 for providing electric energy.