Cooling mechanism of battery, battery and electric device

Abstract

The utility model discloses a cooling mechanism of a battery, the battery and an electric device. The battery includes: a case having an accommodating space formed therein; the cooling mechanism is arranged in the accommodating space, the cooling mechanism comprises a first shell and a second shell, the first shell is provided with a first deformation part and a pasting part which are arranged along a first direction, the pasting part is configured to be pasted with a battery monomer of the battery, and the deformation direction of the first deformation part is the same as the first direction; the second shell is located on the side, deviating from the battery monomers, of the first shell, and a refrigerant flow channel is defined by the second shell and the first shell; the battery monomers are arranged in the accommodating space, the outer walls of the battery monomers are adhered to the adhering parts, and the first direction is the same as the thickness direction of the battery monomers. According to the embodiment of the invention, the problem that the cooling effect of the battery monomer becomes poor due to dislocation and falling of the battery monomer and the cooling mechanism caused by deformation of the battery monomer can be improved, the cooling effect of the cooling mechanism on the battery monomer can be improved, and the reliability of the battery and the power utilization device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cooling mechanism, a battery and an electrical device. Background Art

[0002] The battery will generate heat during use, and its electrical energy will be converted into heat energy. When the temperature is too high, it will affect the charging and discharging of the battery. Therefore, in order to improve the reliability of the battery, a cooling mechanism is integrated in the existing battery. The cooling mechanism is arranged close to the battery cell to cool the battery cell.

[0003] In order to achieve a better cooling effect, the existing cooling mechanism is connected and fixed to the battery cell by gluing. However, when the battery cell expands and deforms, the battery cell and the cooling mechanism will be misaligned, resulting in debonding between the two, thereby reducing the cooling effect of the cooling mechanism on the battery cell. Utility Model Content

[0004] In view of the above problems, the battery cooling mechanism, battery and electrical device provided in the present application can improve the problem that the battery cell deformation causes it to be misaligned and fall off from the cooling mechanism, thereby causing the cooling effect of the battery cell to deteriorate.

[0005] In the first aspect, the present application provides a battery, which includes: a box body, which forms a accommodating space; a cooling mechanism, which is arranged in the accommodating space, and the cooling mechanism includes: a first shell, which is provided with a first deformation portion and an adhesive portion arranged along a first direction, the adhesive portion is configured to be adhered to a battery cell of the battery, and the deformation direction of the first deformation portion is the same as the first direction; a second shell, which is located on the side of the first shell away from the battery cell, and is surrounded by the first shell to form a refrigerant flow channel; a battery cell, which is arranged in the accommodating space, and the outer wall of the battery cell is adhered to the adhesive portion, and the first direction is the same as the thickness direction of the battery cell. The adhesive portion is configured to be attached to the battery cell in the battery, which can improve the connection stability between the battery cell and the cooling mechanism, and can shorten the heat transfer path between the cooling mechanism and the battery cell, thereby improving the cooling effect of the refrigerant in the refrigerant flow channel on the battery cell; further, the first deformable portion on the first shell has a deformation ability along the first direction in which the first deformable portion and the adhesive portion are arranged, so that when the battery cell is deformed along the first direction, the first shell and the battery cell are deformed synchronously along the first direction through the deformation of the first deformable portion, thereby reducing the pulling force between the adhesive portion and the adhesive area attached to the battery cell, and improving the problem of misalignment and detachment between the two. Therefore, the present application can improve the problem of misalignment and detachment of the battery cell with the cooling mechanism due to deformation of the battery cell, thereby causing the cooling effect of the battery cell to deteriorate, and can improve the cooling effect of the cooling mechanism on the battery cell, thereby improving the reliability of the battery.

[0006] In some embodiments, the battery further includes: a blocking member, which is arranged between the first deformable portion and the adhesive portion along the first direction, and is arranged in contact with the battery cell and the first shell along the arrangement direction of the first shell and the second shell. When adhesive is arranged between the adhesive portion of the first shell and the battery cell, the adhesive easily flows to the first deformable portion, and the adhesive of the first deformable portion will reduce the deformation ability of the first deformable portion after solidification. Therefore, a blocking member is arranged between the adhesive portion and the first deformable portion to prevent the adhesive from entering the first deformable portion through the blocking member.

[0007] In some embodiments, the battery also includes: an adhesive layer, which is arranged between the battery cell and the adhesive portion, and is respectively adhesively connected to the battery cell and the adhesive portion; wherein the thickness of the adhesive layer is greater than or equal to the dimension of the blocking member along the thickness direction of the adhesive layer, and the difference between the thickness of the adhesive layer and the dimension of the blocking member along the thickness direction of the adhesive layer is less than a threshold value, so that the blocking member does not protrude from the side of the adhesive layer toward the battery cell, the connection stability between the adhesive layer and the adhesive portion of the first shell and the battery cell can be improved, and the thickness of the adhesive layer can be reduced to improve the heat transfer efficiency.

[0008] In some embodiments, the projection of the first deformation portion on the battery cell at least partially covers the corner portion between the side wall of the battery cell and the bottom wall of the battery cell. The first deformation portion is arranged corresponding to the corner portion of the battery cell, which can expand the area of ​​the adhesive portion on the cooling mechanism, thereby increasing the adhesion stability between the battery cell and the cooling mechanism, and improving the heat dissipation effect of the cooling mechanism on the battery cell. And when multiple battery cells share the same cooling mechanism, when two adjacent battery cells expand and deform in directions relative to each other, the first deformation portion arranged corresponding to the corner portion of the battery cell can be deformed synchronously with the two adjacent battery cells, so that the first deformation portion can simultaneously reduce the pulling force between the two adjacent battery cells and the corresponding adhesive portion, thereby improving the problem of battery cell misalignment and detachment.

[0009] In some embodiments, the cooling mechanism is located on the bottom wall of the battery cell. The battery cell is arranged flat in the box, and the cooling mechanism is located on the bottom wall of the battery cell, that is, the end wall of the battery cell away from the electrode column, to dissipate heat from the bottom wall of the battery cell.

[0010] In some embodiments, the battery includes at least two battery cells arranged along a first direction, and the first shell is provided with at least three first deformation parts and two adhesive parts, and the three first deformation parts and the two adhesive parts are arranged in a staggered manner along the first direction. The middle area of ​​each battery cell is adhesively arranged with an adhesive part of the first shell, and the two side areas of the battery cell along the first direction are respectively arranged corresponding to the two first deformation parts, and the first deformation part can consume the deformation of the non-adhesive part of the corresponding battery cell and the non-adhesive part of the adjacent battery cell, thereby reducing the pulling force of the battery cell on the adhesive part.

[0011] In some embodiments, the battery further comprises: a bracket, which is arranged in the accommodating space and connected to the box, and the cooling mechanism is mounted on the bracket. The bracket is used to fix the cooling mechanism to the box, which can improve the connection stability of the cooling mechanism and the battery cell to the box, and improve the reliability of the battery; and it is convenient for the heat dissipation of the cooling mechanism, and improves the problem that the cooling mechanism directly dissipates heat from the box or the heat returns to the battery cell through the box, so that the cooling effect of the battery cell can be improved.

[0012] In some embodiments, the battery includes at least two cooling mechanisms, and water cooling mechanisms are provided on both sides of the bracket that are arranged opposite to each other, and each cooling mechanism is attached to at least two battery cells. The two cooling mechanisms are installed by one bracket, thereby cooling two groups of at least four battery cells, which can simplify the structure and the installation process and cooling process, and reduce costs.

[0013] In some embodiments, the second shell is provided with a second deformable portion, and the deformation direction of the second deformable portion is the same as the first direction. The second shell is provided with a second deformable portion that can be deformed along the first direction, so that when the first shell is deformed along the first direction, the second shell can also be deformed along the first direction, so that the deformation of the second shell is substantially consistent with that of the first shell, thereby improving the cooling mechanism and the problem of changes in the structure of the refrigerant flow channel, and improving the reliability of the cooling mechanism.

[0014] In some embodiments, the first deformable portion includes a first bending portion. The first bending portion is formed by bending the first shell, and the deformation of the first shell is achieved through the bending structure. This structure is simple and easy to implement, and can make the first shell be made of a material with a certain rigidity, so as to improve the rigidity of the non-deformed area of ​​the first shell and improve its installation stability with the battery cell and other structures.

[0015] In some embodiments, the first bent portion is arranged close to the refrigerant flow channel relative to the adhesive portion, so that the first bent portion does not protrude toward the side of the first shell away from the refrigerant flow channel relative to the adhesive portion, that is, it does not protrude toward the side where the battery cell is arranged. This can shorten the distance between the adhesive portion of the first shell and the battery cell, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency.

[0016] In some embodiments, the bending direction of the first bending portion is toward the coolant flow channel, so that the first bending portion is a recessed portion of the first shell facing the coolant flow channel, and does not protrude from the side of the first shell facing the battery cell, which can shorten the distance between the adhesive portion of the first shell and the battery cell, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency. The bending direction of the first bending portion is toward the coolant flow channel, so that the first bending portion forms a single recessed portion, which can reduce the size of the first bending portion along the first direction and improve the deformation capacity of the first bending portion.

[0017] In some embodiments, the first deformable portion is extended along the second direction, the second direction is perpendicular to the first direction and the third direction, wherein the third direction is the arrangement direction of the first shell and the second shell; the adhesive portion is extended along the second direction. The battery cell, the first shell and the second shell are arranged along the third direction, and the second shell is located between the battery cell and the second shell, so that the first shell serves as a heat absorption surface of the cooling mechanism to transfer the heat of the battery cell to the refrigerant flow channel; the first deformable portion and the adhesive portion on the first shell are arranged along the first direction, and the first deformable portion extends along the second direction perpendicular to the first direction and the third direction to increase the deformation capacity of the first shell along the first direction; the adhesive portion extends along the second direction to increase the adhesive area between the first shell and the battery cell, thereby increasing the connection stability and heat transfer efficiency between the two.

[0018] In the second aspect, the present application provides a cooling mechanism. The cooling mechanism includes: a first shell, provided with a first deformable portion and an adhesive portion arranged along a first direction, the adhesive portion is configured to be adhesively arranged with a battery cell of a battery, and the deformation direction of the first deformable portion is the same as the first direction; a second shell, located on the side of the first shell away from the battery cell, and surrounded by the first shell to form a refrigerant flow channel. The adhesive portion is configured to be adhesively arranged with the battery cell in the battery, which can improve the connection stability between the battery cell and the cooling mechanism, and can shorten the heat transfer path between the cooling mechanism and the battery cell, thereby improving the cooling effect of the refrigerant in the refrigerant flow channel on the battery cell; further, the first deformable portion on the first shell has a deformation ability along the first direction in which the first deformable portion and the adhesive portion are arranged, so that when the battery cell is deformed along the first direction, the first shell and the battery cell are deformed synchronously along the first direction through the deformation of the first deformable portion, thereby reducing the pulling force between the adhesive portion and the adhesive area of ​​the battery cell, and improving the problem of misalignment and detachment between the two. Therefore, the present application can improve the problem that the battery cell deformation causes the battery cell to be misaligned and fall off from the cooling mechanism, thereby causing the cooling effect of the battery cell to deteriorate, and can improve the cooling effect of the cooling mechanism on the battery cell.

[0019] In some embodiments, the second shell is provided with a second deformable portion, and the deformation direction of the second deformable portion is the same as the first direction. The second shell is provided with a second deformable portion that can be deformed along the first direction, so that when the first shell is deformed along the first direction, the second shell can also be deformed along the first direction, so that the deformation of the second shell is substantially consistent with that of the first shell, thereby improving the cooling mechanism and the problem of changes in the structure of the refrigerant flow channel, and improving the reliability of the cooling mechanism.

[0020] In some embodiments, the first deformable portion includes a first bending portion. The first bending portion is formed by bending the first shell, and the deformation of the first shell is achieved through the bending structure. This structure is simple and easy to implement, and can make the first shell be made of a material with a certain rigidity, so as to improve the rigidity of the non-deformed area of ​​the first shell and improve its installation stability with the battery cell and other structures.

[0021] In some embodiments, the first bent portion is arranged close to the refrigerant flow channel relative to the adhesive portion, so that the first bent portion does not protrude toward the side of the first shell away from the refrigerant flow channel relative to the adhesive portion, that is, it does not protrude toward the side where the battery cell is arranged. This can shorten the distance between the adhesive portion of the first shell and the battery cell, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency.

[0022] In some embodiments, the bending direction of the first bending portion is toward the coolant flow channel, so that the first bending portion is a recessed portion of the first shell facing the coolant flow channel, and does not protrude from the side of the first shell facing the battery cell, which can shorten the distance between the adhesive portion of the first shell and the battery cell, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency. The bending direction of the first bending portion is toward the coolant flow channel, so that the first bending portion forms a single recessed portion, which can reduce the size of the first bending portion along the first direction and improve the deformation capacity of the first bending portion.

[0023] In some embodiments, the first bending portion includes a plurality of sub-bending portions connected along a first direction, the sub-bending portions are arranged toward or away from the refrigerant flow channel, and the bending directions of two adjacent sub-bending portions are opposite. The first bending portion is realized by a plurality of sub-bending portions to form a wavy first bending portion, which can reduce the requirements on the material deformation capacity of the first shell.

[0024] In some embodiments, the first deformation portion includes a groove disposed on a side of the first shell away from the refrigerant flow channel. The first deformation portion on the first shell is realized by grooving the first shell to form the groove, which can simplify the process.

[0025] In some embodiments, the first deformable portion is extended along the second direction, the second direction is perpendicular to the first direction and the third direction, wherein the third direction is the arrangement direction of the first shell and the second shell; the adhesive portion is extended along the second direction. The battery cell, the first shell and the second shell are arranged along the third direction, and the second shell is located between the battery cell and the second shell, so that the first shell serves as a heat absorption surface of the cooling mechanism to transfer the heat of the battery cell to the refrigerant flow channel; the first deformable portion and the adhesive portion on the first shell are arranged along the first direction, and the first deformable portion extends along the second direction perpendicular to the first direction and the third direction to increase the deformation capacity of the first shell along the first direction; the adhesive portion extends along the second direction to increase the adhesive area between the first shell and the battery cell, thereby increasing the connection stability and heat transfer efficiency between the two.

[0026] In some embodiments, the first shell includes at least two first deformation parts and one adhesive part, and the first deformation parts are provided on both sides of the adhesive part. The first deformation parts are provided on both sides of the adhesive part, so that when the battery cell attached to the adhesive part is deformed in both directions, the deformation in both directions can be consumed by the first deformation parts on both sides of the adhesive part, so that the first shell and the two sides of the battery cell are deformed synchronously, thereby improving the ability of the first shell to deform with the deformation of the battery cell, and further improving the problem of misalignment and falling off of the two.

[0027] In some embodiments, the second deformation portion includes a second bending portion, and the bending direction of the second bending portion is toward the refrigerant flow channel. The second bending portion is formed by bending the second shell, and the deformation of the second shell is achieved through the bending structure. This structure is simple and easy to implement, and can enable the second shell to be implemented with a material with a certain rigidity, so as to improve the rigidity of the non-deformation area of ​​the second shell, and improve its installation stability with the battery cell and other structures. Bending the second bending portion toward the refrigerant flow channel can make the second bending portion a groove of the second shell toward the refrigerant flow channel, without protruding from the side of the second shell away from the first shell, which can reduce the volume of the cooling mechanism and facilitate the assembly of the cooling mechanism with other components of the battery.

[0028] In some embodiments, the second shell is provided with a plurality of second deformation parts spaced apart along the first direction. The deformation directions of the first shell and the second shell are both the first direction, so the second shell is provided with a plurality of second deformation parts spaced apart along the first direction, which can increase the deformation capacity of the second shell along the first direction.

[0029] In the third aspect, the present application provides an electrical device. The electrical device includes the above-mentioned battery. Based on this, the adhesive portion is configured to be attached to the battery cell in the battery, which can improve the connection stability between the battery cell and the cooling mechanism, and can shorten the heat transfer path between the cooling mechanism and the battery cell, thereby improving the cooling effect of the refrigerant in the refrigerant flow channel on the battery cell; further, the first deformable portion on the first shell has a deformation ability along the first direction in which the first deformable portion and the adhesive portion are arranged, so that when the battery cell is deformed along the first direction, the first shell and the battery cell are deformed synchronously along the first direction through the deformation of the first deformable portion, thereby reducing the pulling force between the adhesive portion and the adhesive area attached to the battery cell, and improving the problem of misalignment and detachment between the two. Therefore, the present application can improve the problem of misalignment and detachment of the battery cell with the cooling mechanism due to deformation of the battery cell, thereby causing the cooling effect of the battery cell to deteriorate, and can improve the cooling effect of the cooling mechanism on the battery cell.

[0030] Different from the prior art: the battery provided in the embodiment of the present application includes: a box body and a water-cooling mechanism and a battery cell arranged in the box body, the cooling mechanism includes a first shell and a second shell surrounded by the first shell to form a refrigerant flow channel, and the first shell includes a first deformable portion and an adhesive portion arranged along a first direction, the adhesive portion is configured to be adhesively arranged with the battery cell in the battery, which can improve the connection stability between the battery cell and the cooling mechanism, and can shorten the heat transfer path between the cooling mechanism and the battery cell, thereby improving the cooling effect of the refrigerant in the refrigerant flow channel on the battery cell; further, the first deformable portion on the first shell has a deformation ability along the first direction in which the first deformable portion and the adhesive portion are arranged, so that when the battery cell is deformed along the first direction, the first shell and the battery cell are deformed synchronously along the first direction through the deformation of the first deformable portion, thereby reducing the pulling force between the adhesive portion and the adhesive area on the battery cell where the adhesive connection is made, and improving the problem of misalignment and detachment between the two. Therefore, the embodiments of the present application can improve the problem of poor cooling effect of the battery cell due to displacement and detachment of the battery cell from the cooling mechanism caused by deformation of the battery cell, and can improve the cooling effect of the cooling mechanism on the battery cell, thereby improving the reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0032] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments;

[0033] Figure 2 is a schematic structural diagram of a battery according to one or more embodiments;

[0034] Figure 3 is a schematic structural diagram of a battery cell, a cooling mechanism and a bracket in a battery according to one or more embodiments;

[0035] Figure 4 for Figure 3 a schematic side view of the battery shown;

[0036] Figure 5 for Figure 4 An enlarged schematic diagram of structure A of the battery shown;

[0037] Figure 6 is a schematic structural diagram of a cooling mechanism and a blocking member according to one or more embodiments;

[0038] Figure 7 is a partial structural schematic diagram of a first housing according to one or more embodiments;

[0039] Figure 8 It is a partial structural schematic diagram of a first shell according to one or more embodiments.

[0040] The reference numerals in the specific implementation manner are as follows:

[0041] Vehicle 1000a; battery 100a; controller 200a; motor 300a; housing 10a; first portion 11a; second portion 12a; battery cell 1; cooling mechanism 2; first shell 21; second shell 22; first direction Y; second direction X; third direction Z; first deformation portion 211; adhesive portion 212; second deformation portion 221; blocking member 23; bracket 3; sub-bending portion 30; groove 40; adhesive layer 50. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] With the development of battery technology, batteries are used in more and more fields and are gradually replacing traditional fossil energy in the field of automobile power. Batteries can store chemical energy and controllably convert chemical energy into electrical energy. In recyclable batteries, the active materials can be activated by charging after discharge and continue to be used.

[0050] Generally, a battery includes a shell and a battery cell accommodated in the shell. The battery will generate heat during use, and its electrical energy will be converted into heat energy. When the temperature is too high, it will affect the charging and discharging of the battery. Therefore, in order to improve the reliability of the battery, a cooling mechanism is integrated in the battery. The cooling mechanism is arranged close to the battery cell to cool the battery cell.

[0051] In order to achieve a better cooling effect, the cooling mechanism and the battery cell can be connected and fixed by gluing. However, when the battery cell expands and deforms, the battery cell and the cooling mechanism will be misaligned, resulting in debonding between the two, thereby reducing the cooling effect of the cooling mechanism on the battery cell.

[0052] The bonding area between the battery cell and the cooling mechanism must be guaranteed to meet the thermal management cooling requirements. For example, if the battery cell is set flat in the shell, the cooling mechanism cools the bottom of the battery cell. When the battery cell expands thermally, its bottom and the cooling mechanism will be misaligned, resulting in debonding, which will cause the cooling mechanism to have a poor water cooling effect on the battery cell, making it difficult to improve the reliability of the battery.

[0053] Based on the above considerations, the present application proposes that a cooling mechanism that can adaptively deform along the thickness direction of the battery cell is provided in the battery box, which can improve the problem of dislocation and debonding between the cooling mechanism and the battery cell. Specifically, the battery provided in the embodiment of the present application includes a box, a water cooling mechanism and a battery cell arranged in the box, and the first shell of the cooling mechanism includes a first deformable portion and an adhesive portion arranged along a first direction, and the adhesive portion is configured to be attached to the battery cell in the battery, which can improve the connection stability between the battery cell and the cooling mechanism, and can shorten the heat transfer path between the cooling mechanism and the battery cell, thereby improving the cooling effect of the coolant in the coolant flow channel on the battery cell; further, the first deformable portion on the first shell has a deformation ability along the first direction in which the first deformable portion and the adhesive portion are arranged, so that when the battery cell is deformed along the first direction, the first shell is deformed synchronously with the battery cell along the first direction through the deformation of the first deformable portion, thereby reducing the pulling force between the adhesive portion and the adhesive area of ​​the battery cell, and improving the problem of dislocation and detachment between the two. Therefore, the embodiments of the present application can improve the problem of poor cooling effect of the battery cell due to displacement and detachment of the battery cell from the cooling mechanism caused by deformation of the battery cell, and can improve the cooling effect of the cooling mechanism on the battery cell, thereby improving the reliability of the battery.

[0054] The cooling mechanism of the battery, the battery and the electric device disclosed in the embodiments of the present application can be used in electric devices that use the battery as a power source or various energy storage systems that use the battery as an energy storage element. The electric device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0055] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0056] Please refer to Figure 1 , the vehicle 1000a can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100a is arranged inside the vehicle 1000a, and the battery 100a can be arranged at the bottom, head or tail of the vehicle 1000a. The battery 100a can be used to power the vehicle 1000a, for example, the battery 100a can be used as an operating power source for the vehicle 1000a. The vehicle 1000a may also include a controller 200a and a motor 300a, and the controller 200a is used to control the battery 100a to power the motor 300a, for example, for the starting, navigation and driving power requirements of the vehicle 1000a.

[0057] In some embodiments of the present application, the battery 100a can not only serve as the operating power source of the vehicle 1000a, but also serve as the driving power source of the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.

[0058] In some embodiments, the battery 100a may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0059] The battery 100 a mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0060] In some embodiments, please refer to Figure 2 The battery 100a may be a battery pack, which includes a box body 10a and a battery cell 1, wherein the battery cell 1 or a battery module is accommodated in the box body 10a.

[0061] In some embodiments, the box 10a can be used as a part of the chassis structure of the vehicle 1000a. For example, part of the box 10a can become at least a part of the floor of the vehicle 1000a, or part of the box 10a can become at least a part of the cross beam and longitudinal beam of the vehicle 1000a.

[0062] Please refer to Figure 2 The battery 100a includes a box body 10a and a battery cell 1, and the battery cell 1 is contained in the box body 10a. The box body 10a is used to provide a storage space for the battery cell 1, and the box body 10a can adopt a variety of structures. In some embodiments, the box body 10a may include a first part 11a and a second part 12a, and the first part 11a and the second part 12a cover each other, and the first part 11a and the second part 12a jointly define a storage space for accommodating the battery cell 1. The second part 12a may be a hollow structure with one end open, and the first part 11a may be a plate-like structure, and the first part 11a covers the open side of the second part 12a, so that the first part 11a and the second part 12a jointly define a storage space; the first part 11a and the second part 12a may also be hollow structures with one side open, and the open side of the first part 11a covers the open side of the second part 12a. Of course, the box body 10a formed by the first part 11a and the second part 12a may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0063] In the battery 100a, there can be multiple battery cells 1, and the multiple battery cells 1 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 1 are both connected in series and in parallel. The multiple battery cells 1 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 1 is accommodated in the box 10a; of course, the battery 100a can also be a battery module formed by connecting multiple battery cells 1 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10a. The battery 100a can also include other structures. For example, the battery 100a can also include a converging component for realizing electrical connection between the multiple battery cells 1.

[0064] Among them, the battery 100a also includes a cooling mechanism 2. The cooling mechanism 2 and the battery cell 1 are arranged in the accommodating space of the box body 10a. The outer wall of the battery cell 1 is pasted with the cooling mechanism 2, which not only ensures the stability of the connection between the two, but also shortens the heat transfer path between the battery cell 1 and the cooling mechanism 2 bracket, thereby improving the heat dissipation effect of the cooling mechanism 2 on the battery cell 1 and improving the reliability of the battery cell 1.

[0065] In some embodiments, Figures 2 to 5As shown, the battery 100a includes: a box body 10a, a cooling mechanism 2 and a battery cell 1; wherein the box body 10a forms a accommodating space; the cooling mechanism 2 and the battery cell 1 are arranged in the accommodating space, and the cooling mechanism 2 includes: a first shell 21 and a second shell 22, wherein the first shell 21 is provided with a first deformable portion 211 and an adhesive portion 212 arranged along a first direction Y, the adhesive portion 212 is configured to be adhesively arranged with the battery cell 1 of the battery 100a, and the deformation direction of the first deformable portion 211 is the same as the first direction Y; the second shell 22 is located on the side of the first shell 21 away from the battery cell 1, and the second shell 22 and the first shell 21 are surrounded to form a refrigerant flow channel; the outer wall of the battery cell 1 is adhesively arranged with the adhesive portion 212, and the first direction Y is the same as the thickness direction of the battery cell 1.

[0066] Among them, the first shell 21 and the second shell 22 are connected by welding or the like, and are surrounded to form a refrigerant flow channel to accommodate the refrigerant; the battery cell 1 is glued and connected to the adhesive portion 212 of the first shell 21 to fit the battery cell 1 to the first shell 21 to improve the cooling effect of the battery cell 1; the first deformation portion 211 of the first shell 21 can deform synchronously with the deformation of the battery cell 1.

[0067] For example, when the battery cell 1 is deformed by thermal expansion, the first shell 21 itself can be deformed by expansion and contraction through the deformation of the non-adhesive area, that is, the first deformation portion 211 , and the bonding interface between the first shell 21 and the battery cell 1 will not be misaligned.

[0068] Among them, the thickness direction of the battery cell 1 is the same as the first direction Y, that is, the deformation direction of the first deformation part 211 in the first shell 21, so that when the battery cell 1 expands and deforms along its thickness direction, the first shell 21 is deformed along the thickness direction through the first deformation part 211, so that the two are deformed synchronously, reducing the pulling force between the battery cell 1 and the adhesive part 212 on the first shell 21, and can improve the problem of the cooling mechanism 2 and the battery cell 1 being misaligned and detached due to the deformation caused by the expansion of the battery cell 1.

[0069] The adhesive portion 212 is configured to be attached to the battery cell 1 in the battery 100a, which can improve the connection stability between the battery cell 1 and the cooling mechanism 2, and can shorten the heat transfer path between the cooling mechanism 2 and the battery cell 1, thereby improving the cooling effect of the coolant in the coolant flow channel on the battery cell 1; further, the first deformable portion 211 on the first shell 21 has a deformation ability along the first direction Y where the first deformable portion 211 and the adhesive portion 212 are arranged, so that when the battery cell 1 is deformed along the first direction Y, the first shell 21 and the battery cell 1 are deformed synchronously along the first direction Y through the deformation of the first deformable portion 211, thereby reducing the pulling force between the adhesive portion 212 and the adhesive area attached to the battery cell 1, and improving the problem of misalignment and detachment between the two. Therefore, this embodiment can improve the problem that the battery cell 1 is misaligned and detached from the cooling mechanism 2 due to deformation, thereby causing the cooling effect of the battery cell 1 to deteriorate, and can improve the cooling effect of the cooling mechanism 2 on the battery cell 1, thereby improving the reliability of the battery 100a.

[0070] In some embodiments, the battery 100a further includes: a blocking member 23, which is disposed between the first deformable portion 211 and the adhesive portion along the first direction Y, and is disposed in contact with the battery cell 1 and the first shell 21 along the arrangement direction of the first shell 21 and the second shell 22. When adhesive is disposed between the adhesive portion of the first shell 21 and the battery cell 1, the adhesive is likely to flow to the first deformable portion 211, and the adhesive of the first deformable portion 211 will reduce the deformation ability of the first deformable portion 211 after solidification, so a blocking member is disposed between the adhesive portion and the first deformable portion 211 to prevent the adhesive from entering the first deformable portion 211 through the blocking member 23.

[0071] The blocking member 23 includes a sealing member having a fluid blocking function, such as a plastic member, etc. The side of the blocking member 23 close to the battery cell 1 can also be bonded to the battery cell 1 .

[0072] In some embodiments, the battery 100a also includes: an adhesive layer 50, which is arranged between the battery cell 1 and the adhesive portion 212, and is respectively adhesively connected to the battery cell 1 and the adhesive portion 212; wherein the thickness of the adhesive layer 50 is greater than or equal to the dimension of the blocking member 23 along the thickness direction of the adhesive layer 212, and the difference between the thickness of the adhesive layer 50 and the dimension of the blocking member 23 along the thickness direction of the adhesive layer 212 is less than a threshold value.

[0073] The threshold value may be determined based on the flowability parameter and tension parameter of the adhesive layer 50 and the size of the adhesive portion 212 , so that the adhesive of the adhesive layer 50 will not flow out of the blocking portion 23 .

[0074] This embodiment can prevent the blocking member 23 from protruding from the side of the adhesive layer 50 toward the battery cell 1, and can improve the connection stability between the adhesive layer 50, the adhesive portion 212 of the first shell 21 and the battery cell 1, thereby reducing the thickness of the adhesive layer 50 and improving the heat transfer efficiency.

[0075] Optionally, the thickness of the blocking member 23 , ie, the dimension along the third direction Z, is consistent with the thickness of the adhesive layer between the battery cell 1 and the adhesive portion 212 , so as to improve the stability of the installation of the battery cell 1 .

[0076] In some embodiments, a projection of the first deformation portion 211 on the battery cell 1 at least partially covers a corner portion between a side wall and a bottom wall of the battery cell 1 .

[0077] The corner portion of the battery cell 1 refers to the connection between the outer wall where the battery cell 1 and the cooling mechanism 12 are attached and other outer walls that are not in the same plane as the outer wall. For example, if the cooling mechanism 12 is set at the bottom of the battery cell 1, the projection of the first deformation portion on the battery cell 1 at least partially covers the corner area (such as the R corner) of the bottom wall and the side wall of the battery cell, that is, the first deformation portion 211 is set corresponding to the edge area of ​​the battery cell 1.

[0078] In this embodiment, the first deformable portion 211 is arranged corresponding to the corner of the battery cell 1, which can expand the area of ​​the adhesive portion 212 on the cooling mechanism 2, thereby increasing the adhesive stability between the battery cell 1 and the cooling mechanism 2, and improving the heat dissipation effect of the cooling mechanism 2 on the battery cell 1. When multiple battery cells 1 share the same cooling mechanism, when two adjacent battery cells 1 expand and deform in directions relative to each other, the first deformable portion 211 arranged corresponding to the corner of the battery cell 1 can be deformed synchronously with the two adjacent battery cells 1, so that the first deformable portion 211 can simultaneously reduce the pulling force between the two adjacent battery cells 1 and the corresponding adhesive portion 212, thereby improving the problem of the battery cell 1 being misplaced and falling off.

[0079] In some embodiments, the first deformation portion with a smaller size may not be provided at non-corners, as long as the area of ​​the provided adhesive portion is large enough to ensure the connection stability between the battery cell and the cooling mechanism.

[0080] In some embodiments, the cooling mechanism 2 is located on the bottom wall of the battery cell 1 .

[0081] The battery cell 1 is disposed flat in the box 10 a , and the cooling mechanism 2 is located at the bottom wall of the battery cell 1 , that is, an end wall of the battery cell 1 away from the electrode column, to dissipate heat from the bottom wall of the battery cell 1 .

[0082] Arranging the cooling mechanism 2 on the bottom wall of the battery cell 1 can not only reduce the impact of the cooling mechanism 2 on the electrode column and other components of the battery cell 1, but also make it convenient for multiple battery cells 1 to share the same cooling mechanism 2; and the area of ​​the bottom wall of the battery cell 1 is smaller than the area of ​​its side wall, which can reduce the size of the cooling mechanism 2, thereby reducing the volume of the battery 100a, which is conducive to its miniaturized design.

[0083] In some embodiments, the cooling mechanism 2 may also be located outside the side wall of the battery cell 1 to dissipate heat from the side wall of the battery cell 1. The side wall is an outer wall except for the two end walls of the battery cell 1.

[0084] In some embodiments, the battery 100a includes at least two battery cells 1 arranged along the first direction Y, and the first shell 21 has at least three first deformation portions 211 and two adhesive portions 212, and the three first 211 deformation portions and the two adhesive portions 212 are staggered along the first direction Y.

[0085] The middle area of ​​each battery cell 1 is adhered to an adhesive portion 212 of the first shell 21, and the two side areas of the battery cell 1 along the first direction Y are respectively arranged corresponding to two first deformation portions 211. The first deformation portions 211 can consume the deformation of the non-adhesive portion of the corresponding battery cell 1 and the non-adhesive portion of the adjacent battery cell, thereby reducing the pulling force of the battery cell 1 on the adhesive portion 212 as a whole.

[0086] In some embodiments, the battery 100 a further includes: a bracket 3 disposed in the accommodating space of the box body 10 a and connected to the box body 10 a , and the cooling mechanism 2 is mounted on the bracket 3 .

[0087] By fixing the cooling mechanism 2 to the housing 10a via the bracket 3, the connection stability between the cooling mechanism 2 and the battery cell 1 and the housing 10a can be improved, thereby improving the reliability of the battery 100a; and the heat dissipation of the cooling mechanism 2 can be facilitated, thereby improving the problem that the cooling mechanism 2 directly dissipates heat from the housing 10a or the heat returns to the battery cell 1 through the housing 10a, thereby improving the cooling effect of the battery cell 1.

[0088] In some embodiments, the battery 100 a includes at least two cooling mechanisms 2 , which are respectively disposed on opposite sides of the bracket 3 , and each cooling mechanism 2 is bonded to at least two battery cells 1 .

[0089] The two cooling mechanisms 2 are installed by one bracket 3, thereby cooling two groups of at least four battery cells 1, which can simplify the structure, installation process, cooling process, and reduce costs.

[0090] For other implementations of the cooling mechanism 2 , reference may be made to the above-mentioned embodiments.

[0091] In some embodiments, the second shell 22 is provided with a second deformation portion 221 , and the deformation direction of the second deformation portion 221 is the same as the first direction Y.

[0092] The second shell 22 of this embodiment is provided with a second deformation portion 221 that can be deformed along the first direction Y, so that when the first shell 21 is deformed along the first direction Y, the second shell 22 can also be deformed along the first direction Y, so that the deformation of the second shell 22 is roughly consistent with that of the first shell 21, thereby improving the cooling mechanism 2 and the refrigerant flow channel structure changes and other problems, and improving the reliability of the cooling mechanism 2.

[0093] In some embodiments, the first deformation portion 211 includes a first bending portion.

[0094] In this embodiment, the first shell 21 is bent to form the first bending portion, and the first shell 21 is deformed by the bending structure. This structure is simple and easy to implement, and the first shell 21 can be made of a material with a certain rigidity, so as to improve the rigidity of the non-deformed area of ​​the first shell 21 and improve its installation stability with the battery cell 1 and other structures.

[0095] In other embodiments, the first deformation portion may also be implemented by using a deformation material with deformation ability, or by thinning a partial area of ​​the first shell having a certain rigidity and flexibility to implement the first deformation portion, and so on.

[0096] In some embodiments, the first bent portion is arranged close to the refrigerant flow channel relative to the adhesive portion 212, so that the first bent portion does not protrude toward the side of the first shell 21 away from the refrigerant flow channel relative to the adhesive portion, that is, it does not protrude toward the side where the battery cell 1 is arranged. This can shorten the distance between the adhesive portion of the first shell 21 and the battery cell 1, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency.

[0097] In some embodiments, the bending direction of the first bending portion is toward the refrigerant flow channel.

[0098] The bending direction of the first bending portion is directed toward the coolant flow channel, so that the first bending portion is a recessed portion of the first shell 21 facing the coolant flow channel, and does not protrude from the side of the first shell 21 facing the battery cell 1, which can shorten the distance between the adhesive portion 212 of the first shell 21 and the battery cell 1, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency. The bending direction of the first bending portion is directed toward the coolant flow channel, so that the first bending portion forms a single recessed portion, which can reduce the size of the first bending portion along the first direction and improve the deformation capacity of the first bending portion.

[0099] Of course, the thickness of the adhesive layer needs to meet the adhesive strength requirement between the adhesive portion 212 and the battery cell 1 .

[0100] The number, shape, size and number of bending points of the first bending portions can be set based on the deformation amount of the battery cell 1 .

[0101] In some embodiments, the first deformable portion 211 is extended along the second direction X, and the second direction X is perpendicular to the first direction Y and the third direction Z, wherein the third direction Z is the arrangement direction of the first shell 21 and the second shell 22; the adhesive portion 212 is extended along the second direction X. The battery cell 1, the first shell 21 and the second shell 22 are arranged along the third direction Z, and the second shell 22 is located between the battery cell 1 and the second shell 22, so that the first shell 21 serves as the heat absorption surface of the cooling mechanism 2 to transfer the heat of the battery cell 1 to the refrigerant flow channel; the first deformable portion 211 and the adhesive portion 212 on the first shell 21 are arranged along the first direction Y, and the first deformable portion 211 extends along the second direction X perpendicular to the first direction Y and the third direction Z, so as to increase the deformation ability of the first shell 21 along the first direction Y; the adhesive portion 212 extends along the second direction X, so as to increase the adhesive area between the first shell 21 and the battery cell 1, thereby increasing the connection stability and heat transfer efficiency between the two.

[0102] In some embodiments, the cooling mechanism 2 may be connected to the second portion 12a, and the second portion 12a may be provided with a plurality of battery cell groups (eg, Figure 3 shown).

[0103] In some embodiments, Figure 3-6 As shown, the cooling mechanism 2 includes: a first shell 21 and a second shell 22, wherein the first shell 21 is provided with a first deformation portion 211 and an adhesive portion 212 arranged along a first direction Y, the adhesive portion 212 is configured to be adhered to the battery cell 1 of the battery 100a, and the deformation direction of the first deformation portion 211 is the same as the first direction Y; the second shell 22 is located on the side of the first shell 21 away from the battery cell 1, and the second shell 22 and the first shell 21 are surrounded to form a refrigerant flow channel.

[0104] Among them, the first shell 21 and the second shell 22 are connected by welding or the like, and are surrounded to form a refrigerant flow channel to accommodate the refrigerant; the battery cell 1 is glued and connected to the adhesive portion 212 of the first shell 21 to fit the battery cell 1 to the first shell 21 to improve the cooling effect of the battery cell 1; the first deformation portion 211 of the first shell 21 can deform synchronously with the deformation of the battery cell 1.

[0105] For example, when the battery cell 1 is deformed by thermal expansion, the first shell 21 itself can be deformed by expansion and contraction through the deformation of the non-adhesive area, that is, the first deformation portion 211 , and the bonding interface between the first shell 21 and the battery cell 1 will not be misaligned.

[0106] The adhesive portion 212 is configured to be attached to the battery cell 1 in the battery 100a, which can improve the connection stability between the battery cell 1 and the cooling mechanism 2, and can shorten the heat transfer path between the cooling mechanism 2 and the battery cell 1, thereby improving the cooling effect of the coolant in the coolant flow channel on the battery cell 1; further, the first deformable portion 211 on the first shell 21 has a deformation ability along the first direction Y where the first deformable portion 211 and the adhesive portion 212 are arranged, so that when the battery cell 1 is deformed along the first direction Y, the first shell 21 and the battery cell 1 are deformed synchronously along the first direction Y through the deformation of the first deformable portion 211, thereby reducing the pulling force between the adhesive portion 212 and the adhesive area attached to the battery cell 1, and improving the problem of misalignment and detachment between the two. Therefore, this embodiment can improve the problem that the battery cell 1 is misaligned and detached from the cooling mechanism 2 due to the deformation of the battery cell 1, thereby causing the cooling effect of the battery cell 1 to deteriorate, and can improve the cooling effect of the cooling mechanism 2 on the battery cell 1.

[0107] In some embodiments, the second shell 22 is provided with a second deformation portion 221 , and the deformation direction of the second deformation portion 221 is the same as the first direction Y.

[0108] The second shell 22 of this embodiment is provided with a second deformation portion 221 that can be deformed along the first direction Y, so that when the first shell 21 is deformed along the first direction Y, the second shell 22 can also be deformed along the first direction Y, so that the deformation of the second shell 22 is roughly consistent with that of the first shell 21, thereby improving the cooling mechanism 2 and the refrigerant flow channel structure changes and other problems, and improving the reliability of the cooling mechanism 2.

[0109] In some embodiments, the first deformation portion 211 includes a first bending portion.

[0110] In this embodiment, the first shell 21 is bent to form the first bending portion, and the first shell 21 is deformed by the bending structure. This structure is simple and easy to implement, and the first shell 21 can be made of a material with a certain rigidity, so as to improve the rigidity of the non-deformed area of ​​the first shell 21 and improve its installation stability with the battery cell 1 and other structures.

[0111] In other embodiments, the first deformation portion may also be implemented by using a deformation material with deformation ability, or by thinning a partial area of ​​the first shell having a certain rigidity and flexibility to implement the first deformation portion, and so on.

[0112] In some embodiments, the first bent portion is arranged close to the refrigerant flow channel relative to the adhesive portion 212, so that the first bent portion does not protrude toward the side of the first shell 21 away from the refrigerant flow channel relative to the adhesive portion, that is, it does not protrude toward the side where the battery cell 1 is arranged. This can shorten the distance between the adhesive portion of the first shell 21 and the battery cell 1, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency.

[0113] In some embodiments, the bending direction of the first bending portion is toward the refrigerant flow channel.

[0114] The bending direction of the first bending portion is directed toward the coolant flow channel, so that the first bending portion is a recessed portion of the first shell 21 facing the coolant flow channel, and does not protrude from the side of the first shell 21 facing the battery cell 1, which can shorten the distance between the adhesive portion 212 of the first shell 21 and the battery cell 1, thereby reducing the thickness of the adhesive layer and improving the heat transfer efficiency. The bending direction of the first bending portion is directed toward the coolant flow channel, so that the first bending portion forms a single recessed portion, which can reduce the size of the first bending portion along the first direction and improve the deformation capacity of the first bending portion.

[0115] Of course, the thickness of the adhesive layer needs to meet the adhesive strength requirement between the adhesive portion 212 and the battery cell 1 .

[0116] The number, shape, size and number of bending points of the first bending portions can be set based on the deformation amount of the battery cell 1 .

[0117] In some embodiments, Figure 7 As shown, the first bending portion includes a plurality of sub-bending portions 30 connected along a first direction Y. The sub-bending portions 30 are arranged toward or away from the refrigerant flow channel, and the bending directions of two adjacent sub-bending portions 30 are opposite. The first bending portion is realized by a plurality of sub-bending portions 30 to form a wavy first bending portion, which can reduce the requirements on the material deformation capacity of the first shell 21.

[0118] In some embodiments, Figure 8 As shown, the first deformation part 211 includes a groove 40 disposed on the side of the first shell 21 away from the refrigerant flow channel. The first deformation part 211 on the first shell 21 is realized by digging a groove 40 in the first shell 21, which can simplify the process.

[0119] In one embodiment, if Figure 3-6 As shown, the first deformation portion 211 is extended along the second direction X, and the second direction X is perpendicular to the first direction Y and the third direction Z, wherein the third direction Z is the arrangement direction of the first shell 21 and the second shell 22; the adhesive portion 212 is extended along the second direction X.

[0120] The battery cell 1, the first shell 21 and the second shell 22 are arranged along the third direction Z, and the second shell 22 is located between the battery cell 1 and the second shell 22, so that the first shell 21 serves as the heat absorption surface of the cooling mechanism 2 to transfer the heat of the battery cell 1 to the refrigerant flow channel; the first deformation portion 211 and the adhesive portion 212 on the first shell 21 are arranged along the first direction Y, and the first deformation portion 211 extends along the second direction X perpendicular to both the first direction Y and the third direction Z to increase the deformation ability of the first shell 21 along the first direction Y; the adhesive portion 212 extends along the second direction X to increase the adhesive area between the first shell 21 and the battery cell 1, thereby increasing the connection stability and heat transfer efficiency between the two.

[0121] In some embodiments, the first shell 21 includes at least two first deformable portions 211 and one adhesive portion 212 , and the first deformable portions 211 are disposed on both sides of the adhesive portion 212 .

[0122] The first deformation portion 211 is provided on both sides of the adhesive portion 212, so that when the battery cell 1 adhered to the adhesive portion 212 is deformed from the middle to both sides, the deformation in two directions can be consumed by the first deformation portions 211 on both sides of the adhesive portion 212, so that the first shell 21 and the two sides of the battery cell 1 are deformed synchronously, thereby improving the ability of the first shell 21 to deform with the deformation of the battery cell 1, and further improving the problem of misalignment and detachment of the two.

[0123] In some embodiments, the second deformable portion 221 includes a second bending portion, and the bending direction of the second bending portion is toward the refrigerant flow channel.

[0124] In this embodiment, the second bending portion is formed by bending the second shell 22, and the deformation of the second shell 22 is achieved through the bending structure. This structure is simple and easy to implement, and can make the second shell 22 made of a material with a certain rigidity, so as to improve the rigidity of the non-deformed area of ​​the second shell 22 and improve its installation stability with the battery cell 1 and other structures. The bending direction of the second bending portion is directed toward the refrigerant flow channel, so that the second bending portion is a groove of the second shell 22 facing the refrigerant flow channel, and does not protrude from the side of the second shell 22 away from the first shell 21, which can reduce the volume of the cooling mechanism 2 and facilitate the assembly of the cooling mechanism 2 with other components of the battery 100a.

[0125] In other embodiments, the second deformation portion may also be implemented by using a deformation material with deformation ability, or by thinning a partial area of ​​the second shell having a certain rigidity and flexibility to implement the second deformation portion, and so on.

[0126] In other embodiments, the second deformation portion may also be Figure 7 , Figure 8 And other structures.

[0127] The number, shape, size, and number of bending points of the second bending portions can be set based on the deformation of the battery cell 1 and the deformation of the first shell 21 .

[0128] In other embodiments, the bending direction of the second bending portion may also be away from the refrigerant flow channel.

[0129] In some embodiments, the second housing 22 is provided with a plurality of second deformation portions 221 spaced apart along the first direction Y.

[0130] The deformation directions of the first shell 21 and the second shell 22 are both the first direction Y, so the second shell 22 is provided with a plurality of second deformation parts 221 arranged at intervals along the first direction Y, which can increase the deformation capacity of the second shell 22 along the first direction Y.

[0131] Optionally, the second deformation portion 221 is extended along the second direction X, which can increase the deformation capacity of the second shell 22 along the first direction Y.

[0132] In other embodiments, the second shell can be made of deformable material without the need for a bending design.

[0133] The first shell 21 and the second shell 22 can be made of a material with good heat dissipation and can be bent, such as aluminum, stainless steel, etc.

[0134] In some embodiments, the cooling mechanism 2 includes: a first shell 21 and a second shell 22, wherein the first shell 21 is provided with a first deformable portion 211 and an adhesive portion 212, and the second shell 22 is provided with a second deformable portion 221; wherein the first deformable portion 311 is a first bending portion concave toward the coolant flow channel, and the second deformable portion 221 is a second bending portion concave toward the coolant flow channel; the first deformable portion 211 and the adhesive portion 212 are arranged along the thickness direction of the battery 100a, that is, the first direction Y, and the first deformable portion 211, the adhesive portion 212 and the second deformable portion 221 are all extended along the second direction X. The deformation direction of the first deformable portion 211 and the deformation direction of the second deformable portion 221 are both the first direction Y.

[0135] A blocking member 23 is disposed between the first bending portion and the pasting portion 212 to prevent the adhesive from flowing into the first bending portion.

[0136] In order to increase the area of ​​the adhesive portion 212 , the non-bending area of ​​the first shell 21 except for the blocking member 23 is configured as the adhesive portion 212 .

[0137] Wherein, the bending direction of the first bending portion and the bending direction of the second bending portion are both toward the refrigerant flow channel.

[0138] The battery cell 1 is disposed flat in the box 10 a , and the cooling mechanism 2 is located at the bottom wall of the battery cell 1 , that is, an end wall of the battery cell 1 away from the electrode column, to dissipate heat from the bottom wall of the battery cell 1 .

[0139] The projection of the first deformation portion 211 on the battery cell 1 at least partially covers the corner portion (such as the R corner) of the outer wall of the battery cell 1 .

[0140] In some embodiments, the battery 100a includes: two cooling mechanisms 2 and four groups of battery cells 1, each group of battery cells 1 is arranged along the second direction X; the two cooling mechanisms 2 are respectively arranged on two opposite sides of the bracket 3, and each cooling mechanism 2 is pasted to two groups of battery cells 1 arranged along the first direction Y.

[0141] The first housing 21 is provided with three first deformable portions 211 and two adhesive portions 212, and the three first 211 deformable portions and the two adhesive portions 212 are staggered along the first direction Y. The middle area of ​​each battery cell 1 is adhesively arranged with an adhesive portion 212, and the two side areas of the battery cell 1 along the first direction Y are respectively arranged corresponding to the two first deformable portions 211. The first deformable portions 211 can consume the deformation of the non-adhesive portion of the corresponding battery cell 1 and the non-adhesive portion of the adjacent battery cell, thereby reducing the pulling force of the battery cell 1 on the adhesive portion 212 as a whole.

[0142] Water may be provided in the refrigerant flow channel of the cooling mechanism 2 to achieve the water cooling function of the cooling mechanism 2. Of course, other refrigerants may also be provided in the refrigerant flow channel, which is not specifically limited.

[0143] The present application further proposes an electrical device, which includes a battery. The introduction of the electrical device can refer to the above-mentioned embodiment. Based on this, it is possible to improve the problem that the battery cell is misaligned and detached from the cooling mechanism due to the deformation of the battery cell, thereby causing the cooling effect of the battery cell to deteriorate. The cooling effect of the cooling mechanism on the battery cell can be improved, thereby improving the reliability of the battery and the electrical device.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: The battery comprises: A box body is formed with a receiving space; A cooling mechanism is arranged in the accommodating space, and the cooling mechanism comprises: A first housing is provided with a first deformable portion and an adhesive portion arranged along a first direction, wherein the adhesive portion is configured to be attached to a battery cell of the battery, and the deformation direction of the first deformable portion is the same as the first direction; A second shell is located on a side of the first shell away from the battery cell and is surrounded by the first shell to form a refrigerant flow channel; A battery cell is arranged in the accommodation space, an outer wall of the battery cell is adhered to the adhesive portion, and the first direction is the same as a thickness direction of the battery cell.

2. The battery according to claim 1, characterized in that The battery also includes: The blocking member is disposed between the first deformation portion and the adhesive portion along the first direction, and is disposed in contact with the battery cell and the first shell along the arrangement direction of the first shell and the second shell.

3. The battery according to claim 2, characterized in that The battery also includes: An adhesive layer is disposed between the battery cell and the adhesive portion, and is adhesively connected to the battery cell and the adhesive portion respectively; The thickness of the adhesive layer is greater than or equal to the dimension of the blocking member along the thickness direction of the adhesive layer, and the difference between the thickness of the adhesive layer and the dimension of the blocking member along the thickness direction of the adhesive layer is less than a threshold value.

4. The battery according to claim 1, characterized in that A projection of the first deformation portion on the battery cell at least partially covers a corner portion between a side wall of the battery cell and a bottom wall of the battery cell.

5. The battery according to claim 4, characterized in that The cooling mechanism is located on the bottom wall of the battery cell.

6. The battery according to claim 1, characterized in that The battery includes at least two battery cells arranged along the first direction, the first shell is provided with at least three first deformation parts and two adhesion parts, and the three first deformation parts and the two adhesion parts are arranged in a staggered manner along the first direction.

7. The battery according to claim 1, characterized in that The battery also includes: The bracket is arranged in the accommodating space and connected to the box body, and the cooling mechanism is installed on the bracket.

8. The battery according to claim 7, characterized in that The battery comprises at least two cooling mechanisms, and the cooling mechanisms are arranged on two opposite sides of the bracket, and each cooling mechanism is bonded to at least two battery cells.

9. The battery according to any one of claims 1 to 8, characterized in that: The second shell is provided with a second deformation portion, and the deformation direction of the second deformation portion is the same as the first direction.

10. The battery according to any one of claims 1 to 8, characterized in that: The first deformation portion includes a first bending portion.

11. The battery according to claim 10, characterized in that The first bending portion is arranged relative to the sticking portion and close to the refrigerant flow channel.

12. The battery according to claim 11, characterized in that The bending direction of the first bending portion is toward the refrigerant flow channel.

13. The battery according to any one of claims 1 to 8, characterized in that: The first deformation portion is extended along a second direction, the second direction is perpendicular to the first direction and a third direction, wherein the third direction is an arrangement direction of the first shell and the second shell; The sticking portion is extended along the second direction.

14. A battery cooling mechanism, characterized in that: The cooling mechanism comprises: A first housing is provided with a first deformable portion and an adhesive portion arranged along a first direction, wherein the adhesive portion is configured to be attached to a battery cell of the battery, and the deformation direction of the first deformable portion is the same as the first direction; The second shell is located on a side of the first shell away from the battery cell and is surrounded by the first shell to form a cooling medium flow channel.

15. The cooling mechanism according to claim 14, characterized in that: The second shell is provided with a second deformation portion, and the deformation direction of the second deformation portion is the same as the first direction.

16. The cooling mechanism according to claim 14 or 15, characterized in that: The first deformation portion includes a first bending portion.

17. The cooling mechanism according to claim 16, characterized in that: The first bending portion is arranged relative to the sticking portion and close to the refrigerant flow channel.

18. The cooling mechanism according to claim 17, characterized in that: The bending direction of the first bending portion is toward the refrigerant flow channel.

19. The cooling mechanism according to claim 17, characterized in that: The first bending portion includes a plurality of sub-bending portions connected along the first direction. The sub-bending portions are arranged toward or away from the refrigerant flow channel, and the bending directions of two adjacent sub-bending portions are opposite.

20. The cooling mechanism according to claim 14 or 15, characterized in that: The first deformation portion includes a groove arranged on a side of the first shell away from the refrigerant flow channel.

21. The cooling mechanism according to claim 14, characterized in that: The first deformation portion is extended along a second direction, the second direction is perpendicular to the first direction and a third direction, wherein the third direction is an arrangement direction of the first shell and the second shell; The sticking portion is extended along the second direction.

22. The cooling mechanism according to claim 21, characterized in that: The first shell includes at least two first deformation parts and one adhesion part, and the first deformation parts are disposed on both sides of the adhesion part.

23. The cooling mechanism according to claim 15, characterized in that: The second deformable portion includes a second bending portion, and a bending direction of the second bending portion is toward the refrigerant flow channel.

24. The cooling mechanism according to claim 15, characterized in that: The second shell is provided with a plurality of second deformation parts spaced apart along the first direction.

25. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 1 to 13.

Images