CN217158339U

CN217158339U - Cooling device, battery and electric device

Info

Publication number: CN217158339U
Application number: CN202220863711.1U
Authority: CN
Inventors: 胡利军; 侯跃攀
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-09
Anticipated expiration: 2032-04-14

Abstract

The application provides a cooling device, battery and electric installation, cooling device includes: the cooling plate is provided with a wall part and a hollow cavity enclosed by the wall part, and the wall part comprises a top wall and a bottom wall which are arranged oppositely at intervals in the thickness direction of the cooling plate; the supporting component is arranged in the hollow cavity and used for supporting the top wall and the bottom wall, the supporting component comprises a plurality of supporting units which are distributed at intervals, each supporting unit is connected with at least one of the top wall and the bottom wall, and a channel for circulating cooling liquid is formed between every two adjacent supporting units; the support unit comprises a main body part and a crushing part, wherein the main body part and the crushing part are distributed in the thickness direction, and under a preset pressure, the crushing part deforms before the main body part so that the top wall and the bottom wall move at least partially in the direction of approaching each other. The cooling device, battery and electric device that this application embodiment provided can guarantee the free cooling of battery, can absorb the bulging force of battery simultaneously.

Description

Cooling device, battery and electric device

Technical Field

The application relates to the field of batteries, in particular to a cooling device, a battery and an electric device.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components 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.

At current battery, its battery monomer can produce a large amount of heats at the in-process of quick charge-discharge, consequently, in order to guarantee the security performance of battery, need cool off battery monomer through cooling device, guarantee that battery monomer works in suitable temperature range all the time. However, the conventional cooling device cannot absorb the expansion force of the battery cell, and the safety performance of the battery is affected. Therefore, how to improve the safety performance of the battery becomes a problem to be solved urgently.

Disclosure of Invention

In view of the above, the present application provides a cooling device, a battery, and an electric device, which can absorb the expansion force of the battery while ensuring cooling of the battery cell.

In a first aspect, the present application provides a cooling apparatus comprising: the cooling plate is provided with a wall part and a hollow cavity enclosed by the wall part, and the wall part comprises a top wall and a bottom wall which are arranged oppositely at intervals in the thickness direction of the cooling plate; the supporting assembly is arranged in the hollow cavity and used for supporting the top wall and the bottom wall, the supporting assembly comprises a plurality of supporting units which are distributed at intervals, each supporting unit is connected with at least one of the top wall and the bottom wall, and a channel for circulating cooling liquid is formed between every two adjacent supporting units; the support unit comprises a main body part and a crushing part, wherein the main body part and the crushing part are distributed in the thickness direction, and under a preset pressure, the crushing part deforms before the main body part so that the top wall and the bottom wall move at least partially in the direction of approaching each other.

The cooling device that this application embodiment provided, including cooling plate and supporting component, the cooling plate has wall portion and encloses the well cavity that closes formation by wall portion, supporting component sets up in hollow intracavity, supporting component includes a plurality of interval distribution's supporting element, every supporting element is connected with the roof and the diapire of wall portion, form the passageway that is used for the coolant liquid circulation between two adjacent supporting elements, be used for circulating cooling medium, make cooling medium can carry out the heat exchange through wall portion and outside battery monomer, the realization is to the free cooling of battery. Because at least one supporting unit comprises the main body part and the crushing parts which are distributed along the thickness direction, and under the preset pressure, the crushing parts deform before the main body part, so that the top wall and the bottom wall move at least partially along the direction close to each other, when the single battery expands in the working process and the expansion force exceeds the preset pressure, the supporting unit with the crushing parts can deform to absorb the expansion force, and the safety performance of the battery is improved.

In some embodiments, the main body portion and the crush portion are a unitary structure.

Through making main part and conquassation position integral type structural style, do benefit to cooling device's shaping to can guarantee the joint strength between main part and the conquassation portion. The supporting requirement between the top wall and the bottom wall is ensured.

In some embodiments, the main body portion is a plate-shaped structural body extending in the thickness direction.

The cooling device that this application embodiment provided, through making the main part be the platelike structure body that extends along thickness direction, can improve the bearing capacity of main part, can guarantee simultaneously that the passageway demand that forms between two adjacent supporting units guarantees the smooth and easy nature of coolant circulation.

In some embodiments, the plurality of support units are distributed at intervals along a first direction, the first direction is perpendicular to the thickness direction, each support unit comprises a main body portion and a crushing portion, and in the first direction, the main body portion of one of two adjacent support units is connected with the top wall and the main body portion of the other support unit is connected with the bottom wall.

The cooling device that this application was implemented and is provided, a plurality of supporting element adopt in the mode of first direction interval distribution, do benefit to the support to roof and diapire, guarantee the smooth and easy nature of coolant circulation. And, through making in first direction, the main part of one in two adjacent supporting unit is connected with the roof and the main part of another is connected with the diapire for no matter battery cell's inflation power is used in roof or diapire, the crushing portion quick response of all corresponding supporting unit is crushd, guarantees the absorption to the inflation power.

In some embodiments, the body portion is connected to one of the top wall and the bottom wall and the crush portion abuts the other of the top wall and the bottom wall.

The cooling device that this application embodiment provided, through making the main part be connected with one in roof and the diapire, another butt of conquassation portion and roof and diapire for when free bulging force of battery acted on roof or bottom, conquassation that conquassation portion can be timely and conquassation do benefit to the absorption in the inflation.

In some embodiments, the crush portion is a tubular structure having through-holes therein.

The cooling device that this application embodiment provided, through making conquassation portion be the tubular structure body, make its inside through-hole that has, can reduce the intensity or the bearing capacity of conquassation portion for when battery monomer inflation and act on roof or diapire, roof or diapire can transmit the bulging force to conquassation portion, and some assurance conquassation portion is in advance main part deformation and absorption bulging force under the effect of bulging force, improves the security performance of battery.

In some embodiments, the crushing part is an arc-shaped sheet-shaped body and has two end parts in the circumferential direction of the crushing part, one end part of the crushing part is connected with the main body part, and the other end part is freely arranged.

The cooling device that this application embodiment provided, through making conquassation portion be the arc lamellar body and have two tip in self week, one of them tip and the main part of conquassation portion are connected and another tip freely sets up, make when battery monomer inflation and act on roof or diapire, roof or diapire can transmit the expansive force to conquassation portion, make conquassation portion compressed, its tip that freely sets up takes place the displacement, effectual assurance conquassation portion is earlier than main part deformation and absorption expansive force under the effect of expansive force, improve the security performance of battery.

In some embodiments, the crushing portion is in a flat plate shape and disposed to intersect with the main body portion, and one of the main body portion and the crushing portion is connected to the top wall and the other is connected to the bottom wall.

The cooling device that this application embodiment provided does benefit to the top wall or diapire and bears the crushing portion inclination when the bulging force and changes, and relative main part takes place the slope for top wall and diapire move to the direction that is close to each other in thickness direction, with the absorption bulging force

In some embodiments, the crushing portion has a corrugated plate shape, one end of the crushing portion is connected to the main body portion and the other end is connected to one of the top wall and the bottom wall.

The cooling device that this application embodiment provided is through making the conquassation portion be the corrugated plate form, and the contained angle between two adjacent board units of conquassation portion changes when roof or diapire bear the bulging force for roof and diapire move to the direction that is close to each other in thickness direction, in order to absorb the bulging force.

In some embodiments, the support assembly further includes anti-crushing plates, the anti-crushing plates are arranged in pairs and located in the hollow cavity, each support unit is located between the anti-crushing plates arranged in pairs, the anti-crushing plates are in a flat plate shape, and one end of each anti-crushing plate is connected with the top wall and the other end of each anti-crushing plate is connected with the bottom wall.

In a second aspect, the present application provides a battery comprising a cooling device as described above.

In a third aspect, the present application provides an electric device comprising the above battery.

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 other 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 reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

fig. 2 is a partially exploded view of a battery according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a battery cell according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a cooling device according to an embodiment of the present application;

FIG. 5 is an enlarged partial schematic view at A of FIG. 4;

FIG. 6 is an enlarged, fragmentary schematic view of a cooling device provided in accordance with another embodiment of the present application;

FIG. 7 is an enlarged, fragmentary schematic view of a cooling device according to yet another embodiment of the present application;

FIG. 8 is a schematic structural diagram of a cooling device according to yet another embodiment of the present application;

fig. 9 is a partially enlarged schematic view at B in fig. 8.

The reference numerals in the detailed description are as follows:

1000-a vehicle;

100-a battery; 200-a controller; 300-a motor;

10-a box body; 11-a first part; 12-a second part;

20-a battery cell;

21-a housing;

22-end cap; 221-a cover plate; 222-electrode terminals;

23-an electrode assembly; 231-a tab;

30-a cooling device;

31-a cooling plate; 311-top wall; 312-a bottom wall; 313-channel;

32-a support assembly; 321-a support unit; 3211-a main body part; 3212-a crushed portion; 3212 a-through hole; 3212 b-end; 3212 c-plate unit; 322-an anti-crushing plate;

x-thickness direction; y-the first direction.

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.

It should be noted that technical terms or scientific terms used in the embodiments of the present application should be understood as having a common meaning as understood by those skilled in the art to which the embodiments of the present application belong, unless otherwise specified.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing the embodiments of the present application and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. 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 description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

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

The inventor of the present invention has noticed that, in the existing battery, the battery cell generates a large amount of heat during the rapid charging and discharging process, and therefore, in order to ensure the safety performance of the battery, the battery cell needs to be cooled by a cooling device, so as to ensure that the battery cell always operates in a proper temperature range. However, in the existing cooling device, the supporting structure arranged in the cooling device is in a structure form of straight up and straight down, when the battery monomer expands in the charging and discharging process, the deformation space is small, the expansion force cannot be absorbed, and the explosion risk is easy to occur.

In order to alleviate the problem of the expansion force of the battery cells, the applicant has studied and found that the expansion force of the battery lift can be absorbed by deforming the cooling device under a predetermined pressure.

In view of the above, the inventors have conducted extensive studies to solve the problems, and have devised a cooling device including a cooling plate and a support member, the cooling device having a wall portion and a hollow cavity defined by the wall portion, the wall portion including a top wall and a bottom wall which are spaced apart and opposed to each other in a thickness direction of the cooling plate. The supporting assembly is arranged in the hollow cavity and used for supporting the top wall and the bottom wall, the supporting assembly comprises a plurality of supporting units which are distributed at intervals, each supporting unit is connected with at least one of the top wall and the bottom wall, and a channel for circulating cooling liquid is formed between every two adjacent supporting units; the support unit comprises a main body part and a crushing part, wherein the main body part and the crushing part are distributed in the thickness direction, and under a preset pressure, the crushing part deforms before the main body part so that the top wall and the bottom wall move at least partially in the direction of approaching each other.

In such a cooling device, a channel for flowing a cooling liquid is formed between two adjacent support units, and is used for flowing a cooling medium, so that the cooling medium can exchange heat with an external battery cell through the wall portion, thereby cooling the battery cell. Because at least one supporting unit comprises the main body part and the crushing parts which are distributed along the thickness direction, and under the preset pressure, the crushing parts deform before the main body part, so that the top wall and the bottom wall move at least partially along the direction close to each other, when the single battery expands in the working process and the expansion force exceeds the preset pressure, the supporting unit with the crushing parts can deform to absorb the expansion force, and the safety performance of the battery is improved.

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

The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above power utilization device.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described battery and electric equipment, but may be applied to all batteries including a box and electric equipment using the battery.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The 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 battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

In some embodiments 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 for the vehicle 1000.

Referring to fig. 2, fig. 2 is a partially exploded view of a battery 100 according to some embodiments of the present disclosure. The battery 100 includes a case 10, a battery cell 20, and a cooling device 30, and the battery cell 20 and the cooling device 30 are accommodated in the case 10. The case 10 is used to provide a receiving space for the battery cells 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 together define a receiving space 13 for receiving the battery cell 20. The second part 12 may be a hollow structure with one open end, the first part 11 may be a plate-shaped structure, and the first part 11 covers the open side of the second part 12, such that the first part 11 and the second part 12 together define the accommodating space 13. The first portion 11 and the second portion 12 may be both hollow structures with one side open, and the open side of the first portion 11 may cover the open side of the second portion 12. Of course, the case 10 formed by the first and

second portions

11 and 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, the number of the battery cells 20 may be multiple, and the multiple battery cells 20 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the multiple battery cells. The plurality of battery cells may be directly connected in series or in parallel or in series-parallel, and the whole body formed by the plurality of battery cells is accommodated in the case 10. Of course, the battery 100 may also be formed by connecting a plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a whole, and the whole is accommodated in the box 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells.

Wherein each battery cell 20 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 20 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 3, fig. 3 is an exploded schematic view of a battery cell 20 according to some embodiments of the present disclosure. The battery cell 20 refers to the smallest unit constituting the battery. The battery cell 20 includes a case 21, a cap assembly 22, and an electrode assembly 23.

The case 21 is a component for fitting the cap assembly 22 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to house the electrode assembly 23, an electrolyte, and other components. The housing 21 and the cap assembly 22 may be separate components, and an opening may be formed in the housing 21, and the cap assembly 22 may cover the opening at the opening to form an internal environment of the battery cell 20. Without limitation, the cover assembly 22 and the housing 21 may be integrated, and specifically, the cover assembly 22 and the housing 21 may form a common connecting surface before other components are inserted into the housing, and when it is necessary to seal the inside of the housing 21, the cover assembly 22 covers the housing 21. The housing 21 may be of various shapes and various sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the case 21 may be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 21 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

The top cap assembly 22 refers to a member that covers an opening of the case 21 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the cap assembly 22 may be adapted to the shape of the housing 21 to fit the housing 21. Alternatively, the top cap assembly 22 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the top cap assembly 22 is not easily deformed when being impacted, the battery cell 20 can have a higher structural strength, and the safety performance can be improved. Functional components such as the electrode terminal 222, the cap plate 221, etc. may be included on the cap assembly 22. The electrode terminal 222 may be used to electrically connect with the electrode assembly 23 for outputting or inputting electric energy of the battery cell 20. The material of the top cover assembly 22 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in the embodiments of the present invention.

The electrode assembly 23 is a part in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 may be contained within the case 21. The electrode assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portion of the electrode assembly 23, and the portions of the positive and negative electrode tabs having no active material each constitute a tab 231. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery, the positive and negative active materials react with the electrolyte, and the tab 231 is connected to the electrode terminal 222 to form a current loop. During the charge and discharge of the electrode assembly 23, gas is generated, so that the case expands.

A cooling device 30 may be provided in the case 10 for contacting and heat-exchanging with the battery cells 20 to cool the battery cells 20. Also, the cooling device 30 is deformable under a predetermined pressure to absorb an expansion force generated by the expansion of the battery cell 20.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a cooling device according to an embodiment of the present application, and fig. 5 is an enlarged schematic view of a portion a in fig. 4.

The cooling device 30 provided by the embodiment of the application includes a cooling plate 31 and a support assembly 32, the cooling plate 31 has a wall portion and a hollow cavity enclosed by the wall portion, and in the thickness direction X of the cooling plate 31, the wall portion includes a top wall 311 and a bottom wall 312 which are spaced and oppositely disposed. The supporting assembly 32 is disposed in the hollow cavity and is used for supporting the top wall 311 and the bottom wall 312, the supporting assembly 32 includes a plurality of supporting units 321 distributed at intervals, each supporting unit 321 is connected to at least one of the top wall 311 and the bottom wall 312, and a channel 313 for circulating a cooling liquid is formed between two adjacent supporting units 321. At least one supporting unit 321 includes a main body portion 3211 and a crushing portion 3212 distributed along the thickness direction X, and under a predetermined pressure, the crushing portion 3212 deforms prior to the main body portion 3211, so that the top wall 311 and the bottom wall 312 move at least partially in a direction approaching each other.

Alternatively, the cooling plate 31 may be circular, elliptical, or polygonal.

Alternatively, the number of the supporting units 321 included in the supporting assembly 32 may be set according to the size of the cooling plate 31. The plurality of supporting units 321 may be distributed at intervals in a direction intersecting the thickness direction X.

Alternatively, each supporting unit 321 may be connected only to the top wall 311 or only to the bottom wall 312, and of course, each supporting unit 321 may be connected to the top wall 311 and the bottom wall 312 respectively.

Alternatively, one of the support units 321 may include the main body portion 3211 and the crush portion 3212 distributed in the thickness direction X, and of course, two or more of the support units 321 may include the main body portion 3211 and the crush portion 3212 distributed in the thickness direction X. Alternatively, all the supporting units 321 of the plurality of supporting units 321 may include the main body portion 3211 and the crushed portions 3212 distributed in the thickness direction X.

Alternatively, the crush portion 3212 deforms prior to the main portion 3211 under a predetermined pressure, which is understood to mean that the strength or load-bearing capacity of the main portion 3211 is greater than that of the crush portion 3212, so that the crush portion 3212 is more easily deformed relative to the main portion 3211 when subjected to an equal pressure.

When the cooling device 30 provided by the embodiment of the application is used for the battery 100, the cooling device can be in contact with the battery cell 20 through the top wall 311 or the bottom wall 312, a channel 313 for circulating a cooling liquid is formed between two adjacent supporting units 321, and is used for circulating a cooling medium, so that the cooling medium can exchange heat with the external battery cell 20 through the wall part, and the cooling of the battery cell 20 is realized. Because at least one supporting unit 321 comprises a main body part 3211 and a crushing part 3212 distributed along the thickness direction X, and under a predetermined pressure, the crushing part 3212 deforms before the main body part 3211 so as to move the top wall 311 and the bottom wall 312 at least partially in a direction toward each other, so that when the battery cell 20 expands during operation and the expansion force exceeds a predetermined pressure, the supporting unit 321 with the crushing part 3212 can deform to absorb the expansion force and improve the safety performance of the battery, and because the main body part 3211 has a certain size in the thickness direction X, the supporting unit 321 will not be crushed as a whole when bearing the predetermined pressure, thereby ensuring the circulation requirement of the cooling medium and further ensuring the cooling requirement.

In some alternative embodiments, the body portion 3211 and the crushed portion 3212 are a unitary structure. Alternatively, the main body portion 3211 and the crushed portion 3212 may be integrally formed by casting or the like.

The cooling device 30 provided by the embodiment of the application is in an integrated structure form of the main body portion 3211 and the crushing portion 3212, so that the cooling device 30 is favorably formed, and the connection strength between the main body portion 3211 and the crushing portion 3212 can be ensured. Ensuring the need for support between the top wall 311 and the bottom wall 312.

In some alternative embodiments, the main body portion 3211 is a plate-shaped structural body extending in the thickness direction X.

Alternatively, the main body portion 3211 may be a strip-shaped structure as a whole. The body portion 3211 may have an equal cross-sectional structure in the thickness direction X, or may have a variable cross-sectional structure. As long as it can be ensured that the predetermined pressure is not required to be crushed.

The cooling device 30 provided by the embodiment of the application can improve the bearing capacity of the main body portion 3211 by making the main body portion 3211 be a plate-shaped structure extending along the thickness direction X, and meanwhile, can ensure the requirement of the channel 313 formed between two adjacent supporting units 321, thereby ensuring the smoothness of the circulation of the cooling medium.

As shown in fig. 4 and 5, in some optional implementations, the supporting units 321 are distributed at intervals along a first direction Y, the first direction Y is perpendicular to the thickness direction X, each supporting unit 321 includes a main body portion 3211 and a crushing portion 3212, and in the first direction Y, the main body portion 3211 of one of the two adjacent supporting units 321 is connected to the top wall 311 and the main body portion 3211 of the other is connected to the bottom wall 312.

Alternatively, the first direction Y may be understood as a width direction of the cooling plate 31, and the interval between two adjacent supporting units 321 may be the same or different.

Alternatively, the main body portion 3211 of one of the two adjacent supporting units 321 is connected to the top wall 311 and the main body portion 3211 of the other is connected to the bottom wall 312, that is, the crushing portion 3212 of one of the two adjacent supporting units 321 faces one side of the top wall 311 and the crushing portion 3212 of the other supporting unit 321 faces one side of the bottom wall 312.

In the cooling device 30 provided by the embodiment of the present application, the plurality of supporting units 321 are spaced in the first direction Y, which is beneficial to supporting the top wall 311 and the bottom wall 312, and ensures the smoothness of the circulation of the cooling medium. Moreover, by connecting the main body portion 3211 of one of the two adjacent support units 321 to the top wall 311 and connecting the main body portion 3211 of the other to the bottom wall 312 in the first direction Y, the crush portion 3212 of the corresponding support unit 321 is crushed in quick response regardless of whether the expansion force of the battery cell 20 acts on the top wall 311 or the bottom wall 312, ensuring absorption of the expansion force.

In some optional embodiments, the main body portion 3211 is connected to one of the top wall 311 and the bottom wall 312, and the crushing portion 3212 abuts the other of the top wall 311 and the bottom wall 312.

Alternatively, the main body portion 3211 and one of the top wall 311 and the bottom wall 312 may be fixedly connected, for example, welded or integrally connected to one of the top wall 311 and the bottom wall 312. The crushed portions 3212 may press directly against the other of the top wall 311 or the bottom wall 312.

In the cooling device 30 provided in the embodiment of the present application, the main body portion 3211 is connected to one of the top wall 311 and the bottom wall 312, and the crushing portion 3212 abuts against the other of the top wall 311 and the bottom wall 312, so that when the expansion force of the battery cell 20 acts on the top wall 311 or the bottom, the crushing portion 3212 can be crushed in time, and the expansion force is absorbed favorably.

As shown in fig. 4 and 5, in some alternative embodiments, the crushing portion 3212 is a tubular structure, and the crushing portion 3212 has a through hole 3212a therein.

Alternatively, the crushing portions 3212 may be round tubes, oval tubes, or polygonal tubular structures.

Alternatively, the main body portion 3211 may be connected to the outer peripheral surface of the crushed portion 3212.

The cooling device 30 provided by the embodiment of the application, through making the crushing portion 3212 be the tubular structure, make its inside have through-hole 3212a, can reduce the intensity or the bearing capacity of crushing portion 3212, make when battery cell 20 expands and acts on roof 311 or diapire 312, roof 311 or diapire 312 can transmit the expanding force to crushing portion 3212, make crushing portion 3212 compressed, through-hole 3212a takes place the deformation, effectual assurance is crushing portion 3212 deformation and absorption expanding force before main part 3211 under the effect of expanding force, improve the security performance of battery.

It is understood that the crushing portion 3212 is a tubular structure, and the crushing portion 3212 has a through hole 3212a therein only in an optional manner, but is not limited to the above manner.

Referring to fig. 6, fig. 6 is a partially enlarged schematic view of a cooling device according to another embodiment of the present application. In some optional embodiments, the crushing portion 3212 is an arc-shaped sheet and has two end portions 3212b in its own circumferential direction, one end portion 3212b of the crushing portion 3212 is connected to the main body portion 3211 and the other end portion 3212b is freely disposed.

Alternatively, the arc angle of the crushed portions 3212 may be greater than 180 °. Alternatively, the crushing portion 3212 may be in the form of a hook as a whole.

According to the cooling device 30 provided by the embodiment of the application, the crushing portion 3212 is an arc-shaped sheet-shaped body and has two end portions 3212b in the circumferential direction, one end portion 3212b of the crushing portion 3212 is connected with the main body portion 3211 and the other end portion 3212b is freely arranged, so that when the battery cell 20 expands and acts on the top wall 311 or the bottom wall 312, the top wall 311 or the bottom wall 312 can transmit the expansion force to the crushing portion 3212, the crushing portion 3212 is compressed, the freely arranged end portion 3212b displaces, the crushing portion 3212 is effectively ensured to deform and absorb the expansion force before the main body portion 3211 under the effect of the expansion force, and the safety performance of the battery is improved.

Referring to fig. 7, fig. 7 is a partially enlarged schematic view of a cooling device according to another embodiment of the present application. In some alternative embodiments, the crushing portion 3212 is in a flat plate shape and intersects the main body portion 3211, and one of the main body portion 3211 and the crushing portion 3212 is connected to the top wall 311 and the other is connected to the bottom wall 312.

That is, the crushing portion 3212 and the main body portion 3211 may have a plate-like structure and be disposed to intersect each other. Alternatively, the main body portion 3211 may extend in the thickness direction X, and the crushed portions 3212 may be provided in a direction intersecting the thickness direction X.

In the cooling device 30 according to the embodiment of the present application, the crushing portions 3212 are arranged to intersect the main body portion 3211 in a flat plate shape, and one of the main body portion 3211 and the crushing portions 3212 is connected to the top wall 311 and the other is connected to the bottom wall 312, so that when the top wall 311 or the bottom wall 312 receives an expansion force, the inclination angle of the crushing portion 3212 changes, and the top wall 311 and the bottom wall 312 incline with respect to the main body portion 3211, and the top wall 311 and the bottom wall 312 move in the direction of approaching each other in the thickness direction X to absorb the expansion force.

Referring to fig. 8 and 9, fig. 8 is a schematic structural diagram of a cooling device according to still another embodiment of the present application, and fig. 9 is an enlarged schematic view of a portion at B in fig. 8. In some alternative embodiments, the crushing portion 3212 has a corrugated plate shape, and one end of the crushing portion 3212 is connected to the main body portion 3211 and the other end is connected to one of the top wall 311 and the bottom wall 312.

Alternatively, the corrugated plate shape may be understood as including a plurality of plate units 3212c, the plurality of plate units 3212c being disposed one after another in the thickness direction X, adjacent two plate units 3212c intersecting.

In the cooling device 30 provided in the embodiment of the present application, the crushing portions 3212 are corrugated, and when the top wall 311 or the bottom wall 312 receives an expansion force, an included angle between two adjacent plate units 3212c of the crushing portions 3212 changes, so that the top wall 311 and the bottom wall 312 move in the thickness direction X toward each other to absorb the expansion force.

Referring to fig. 8 and 9, in some optional embodiments, in the cooling device 30 provided in the embodiment of the present application, the supporting assembly 32 further includes crush-preventing plates 322, the crush-preventing plates 322 are disposed in pairs and located in the hollow cavity, each supporting unit 321 is located between the crush-preventing plates 322 disposed in pairs, the crush-preventing plates 322 are in a flat plate shape, and one end of each crush-preventing plate 322 is connected to the top wall 311 and the other end is connected to the bottom wall 312.

Through the above arrangement, the top wall 311 and the bottom can be supported by the pair of the anti-crushing plates 322, and the cooling plate 31 is prevented from being crushed when the borne expansion force of the cooling device 30 is too large, so that the time of the top wall 311 and the bottom wall 312 always has intervals, the smoothness of the circulation of the cooling medium is ensured, and the cooling requirement of the cooling device 30 on the battery cell 20 is further ensured.

In another aspect, the present application provides a battery including the cooling device 30 of the above embodiments.

The battery according to the embodiment of the present application, including the cooling device 30 according to each of the above embodiments, can ensure the cooling demand for the battery cell 20, and when the battery cell 20 expands and the expansion force exceeds the predetermined pressure that the crushing portion 3212 can bear, the crushing portion 3212 is crushed before the main portion 3211, thereby ensuring the absorption of the expansion force and improving the safety performance of the entire battery.

In another aspect, an embodiment of the present application further provides an electric device, including the battery of each of the above embodiments.

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 cooling apparatus, comprising:

the cooling plate is provided with a wall part and a hollow cavity enclosed by the wall part, and the wall part comprises a top wall and a bottom wall which are arranged at intervals and oppositely in the thickness direction of the cooling plate;

the supporting assembly is arranged in the hollow cavity and used for supporting the top wall and the bottom wall, the supporting assembly comprises a plurality of supporting units which are distributed at intervals, each supporting unit is connected with at least one of the top wall and the bottom wall, and a channel for circulating cooling liquid is formed between every two adjacent supporting units;

wherein at least one of the support units comprises a main body portion and a crushing portion distributed along the thickness direction, and the crushing portion deforms prior to the main body portion under a predetermined pressure to move the top wall and the bottom wall at least partially in a direction to approach each other.

2. The cooling device according to claim 1, wherein the main body portion and the crush portion are of an integral structure.

3. The cooling device according to claim 1, wherein the main body portion is a plate-shaped structural body extending in the thickness direction.

4. The cooling device according to claim 3, wherein a plurality of the support units are spaced apart in a first direction perpendicular to the thickness direction, each of the support units includes the main body portion and the crushed portion, and in the first direction, the main body portion of one of adjacent two of the support units is connected to the top wall and the main body portion of the other is connected to the bottom wall.

5. The cooling device according to any one of claims 1 to 4, wherein the main body portion is connected to one of the top wall and the bottom wall, and the crush portion abuts against the other of the top wall and the bottom wall.

6. The cooling device according to claim 5, wherein the crushed portion is a tubular structure having a through hole therein.

7. The cooling device according to claim 5, wherein the crushed portion is an arc-shaped sheet-like body having two end portions in a circumferential direction thereof, one of the end portions of the crushed portion is connected to the main body portion and the other end portion is freely disposed.

8. The cooling device according to any one of claims 1 to 4, wherein the crush portion has a flat plate shape and is provided intersecting with the main body portion, and one of the main body portion and the crush portion is connected to the top wall and the other is connected to the bottom wall.

9. The cooling device according to any one of claims 1 to 4, wherein the crushed portion has a corrugated plate shape, one end of the crushed portion is connected to the main body portion and the other end is connected to one of the top wall and the bottom wall.

10. The cooling device according to any one of claims 1 to 4, wherein the support assembly further comprises crush-proof plates, the crush-proof plates are arranged in pairs and located in the hollow cavity, each support unit is located between the crush-proof plates arranged in pairs, the crush-proof plates are in flat plate shapes, and one ends of the crush-proof plates are connected with the top wall and the other ends of the crush-proof plates are connected with the bottom wall.

11. A battery comprising a cooling device according to any one of claims 1 to 10.

12. An electric device comprising the battery of claim 11.