Cold plate, battery device and electric equipment

Abstract

The utility model discloses a cold plate, a battery device and electric equipment. The battery device comprises a box body, a battery monomer and the cold plate, the battery monomers are arranged in the box body; the cold plate is arranged in the box body and is configured to cool the battery monomers; the cold plate comprises a plate main body and an anti-permeation layer, a cooling channel is arranged in the plate main body, and the anti-permeation layer is arranged on the plate main body and is configured to block permeation of cooling liquid in the cooling channel. According to the technical scheme, the anti-permeation performance of the cold plate to the cooling liquid can be improved, and the possibility of accidents such as short circuit caused by insulation failure due to permeation of the cooling liquid is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cold plate, a battery device, and an electrical device. Background Technology

[0002] Battery devices generate heat during operation, so they are usually equipped with cooling plates to dissipate the heat generated by the individual battery cells.

[0003] However, in the battery devices of this technology, some of the coolant inside the cold plate may seep to the outside during use, leading to insulation failure and causing accidents such as short circuits. Utility Model Content

[0004] The main objective of this application is to provide a battery device that improves the anti-permeability performance of the cold plate to the coolant, thereby reducing the possibility of coolant leakage leading to insulation failure and short circuits.

[0005] To achieve the above objectives, the battery device proposed in this application includes:

[0006] Box;

[0007] Battery cells, the battery cells are housed inside the casing; and

[0008] Cold plate, which is located inside the housing and is configured to cool individual battery cells;

[0009] The cold plate includes a plate body and an anti-permeability layer. The plate body has cooling channels, and the anti-permeability layer is located in the plate body and is configured to block the penetration of coolant located in the cooling channels.

[0010] The battery device of this application sets the cold plate as including a plate body and an anti-permeability layer located on the plate body. The anti-permeability layer can block the penetration of coolant in the cooling channel located in the plate body, improve the anti-permeability performance of the cold plate to coolant, and reduce the possibility of coolant penetrating to the outside of the cold plate, causing insulation failure and short circuit.

[0011] In some embodiments, the anti-permeability layer is provided on the outer surface of the board body.

[0012] Placing the anti-permeability layer on the outside of the main body of the board improves the convenience of its arrangement.

[0013] In some embodiments, the outer surface of the plate body includes:

[0014] Two end faces, spaced apart from each other, each end face having a liquid outlet connecting to a cooling channel; and

[0015] The side circumferential surface connects the two end faces. The part of the side circumferential surface is positioned opposite to the battery cell, and the anti-permeability layer is located on the side circumferential surface.

[0016] By placing the liquid inlet on the end face and the anti-permeability layer on the side circumferential surface, the liquid inlet will not affect the installation of the anti-permeability layer.

[0017] In some embodiments, the impermeable layer covers the entire peripheral surface.

[0018] Making the anti-permeability layer cover the entire side perimeter of the plate can improve the anti-permeability effect of the cold plate; at the same time, it can also make the shape of the cold plate more regular, which will help improve the convenience of its processing and shaping.

[0019] In some embodiments, the plate body is open at both ends, which have two end faces, to be configured as liquid outlets.

[0020] By setting the plate body open at both ends in the direction of the cooling channel extension, the structure of the plate body can be simplified, which in turn facilitates its processing and shaping.

[0021] In some embodiments, the cold plate further includes a reinforcing plate disposed within the cooling channel and extending along the arrangement direction of the two end faces to divide the cooling channel into at least two side-by-side sub-channels.

[0022] By setting up reinforcing plates, the structural strength of the main body of the plate can be improved, thereby reducing the possibility of it being damaged by compression. At the same time, the cooling channel can be divided into at least two parallel sub-channels so that the coolant can be evenly distributed in various positions within the cooling channel, increasing the heat dissipation area and improving the cooling effect on the battery cells.

[0023] In some embodiments, the impermeable layer is made of ethylene-vinyl alcohol copolymer;

[0024] And / or, define the thickness d of the impermeable layer, satisfying the relationship: 50μm≤d≤100μm;

[0025] And / or, the cold-rolled steel sheet also includes an adhesive layer, which is disposed between the main body of the sheet and the anti-permeability layer.

[0026] Using ethylene-vinyl alcohol copolymer to make the anti-permeability layer is beneficial to improving the anti-permeability effect of coolant located in the cooling channel; the range of thickness d of the anti-permeability layer can better balance the anti-permeability performance and heat dissipation performance of the cold plate 30; the setting of the adhesive layer is beneficial to improving the stability of the connection between the anti-permeability layer and the plate body, and will not damage the structure of the anti-permeability layer and the plate body itself.

[0027] This application also proposes a cooling plate configured to cool individual battery cells, the cooling plate comprising:

[0028] The main body of the plate has cooling channels inside; and

[0029] An anti-permeability layer is provided on the main body of the plate and is configured to block the penetration of coolant located in the cooling channel.

[0030] The anti-permeability layer can block the penetration of coolant in the cooling channels located in the main body of the plate, improve the anti-permeability performance of the cold plate, and reduce the possibility of coolant seeping to the outside of the cold plate, causing insulation failure and short circuit.

[0031] In some embodiments, the impermeable layer is made of ethylene-vinyl alcohol copolymer, polypropylene, polyetherimide, polytetrafluoroethylene, or polyimide;

[0032] And / or, define the thickness d of the impermeable layer, satisfying the relationship: 50μm≤d≤100μm;

[0033] And / or, the cold-rolled steel plate also includes an adhesive layer, which is disposed between the main body of the plate and the anti-permeability layer;

[0034] And / or, the outer surface of the main body of the plate includes two end faces and a side peripheral face. The two end faces are arranged opposite to each other and spaced apart. The end faces are provided with liquid inlets that connect to the cooling channels. The side peripheral face connects the two end faces. A portion of the side peripheral face is arranged opposite to the battery cell. An anti-permeability layer is provided on the side peripheral face and covers the entire side peripheral face.

[0035] And / or, a reinforcing plate is provided inside the plate body, the reinforcing plate extending along the extension direction of the cooling channel to divide the cooling channel into at least two side-by-side sub-channels.

[0036] The material type of the anti-permeability layer is designed to improve its anti-permeability effect on the coolant located in the cooling channel. The thickness range (d) of the anti-permeability layer effectively balances the anti-permeability and heat dissipation performance of the cold plate. The adhesive layer enhances the stability of the connection between the anti-permeability layer and the plate body without damaging their structures. Placing the liquid inlet on the end face and the anti-permeability layer on the side circumference prevents the inlet from interfering with the anti-permeability layer's placement. Covering the entire side circumference of the plate body with the anti-permeability layer improves the cold plate's anti-permeability effect and allows for a more regular shape, facilitating easier processing. The reinforcing plate increases the structural strength of the plate body, reducing the likelihood of damage from compression. Furthermore, dividing the cooling channel into at least two parallel sub-channels ensures even distribution of coolant within the channel, increasing the heat dissipation area and improving cooling of the battery cells.

[0037] This application also proposes an electrical device including the aforementioned battery device. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0040] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0041] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0042] Figure 4 for Figure 2 A partial structural diagram of the battery device;

[0043] Figure 5 for Figure 4 Another perspective view of the intercooler plate;

[0044] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0045] Explanation of icon numbers:

[0046] 1000, Vehicle; 100, Battery assembly; 10, Housing; 11, Top cover; 12, Bottom shell; 20, Battery cell; 21, End cap; 21a, Electrode terminal; 22, Housing; 23, Electrode assembly; 231, Tab; 30, Cold plate; 31, Plate body; 311, Cooling channel; 3111, Sub-channel; 312, End face; 3121, Liquid inlet; 313, Side circumferential surface; 314, Reinforcing plate; 33, Anti-permeability layer; 35, Adhesive layer; 40, Adapter; 41, Liquid inlet; 200, Controller; 300, Motor.

[0047] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0049] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0052] Batteries are devices used to store electrical energy. They are widely used not only in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields.

[0053] When a battery device is operating, the individual battery cells generate heat. If this heat is too high, it will adversely affect the performance and lifespan of the battery device. Therefore, cooling plates are usually installed inside the battery device to dissipate heat from the individual battery cells.

[0054] However, in the battery devices of the relevant technologies, some of the coolant inside the cold plate will seep to the outside during use. The moisture that seeps out of the coolant will conduct electricity, causing insulation failure and leading to accidents such as short circuits.

[0055] Therefore, based on the above considerations, in order to solve the problem that some of the coolant in the cold plate of the battery device in the related technology may seep to the outside, leading to insulation failure and causing short circuits and other accidents, this application proposes a novel cold plate. This cold plate is configured to include a plate body and an anti-permeability layer, so as to improve the anti-permeability performance of the cold plate against coolant penetration, thereby reducing the possibility of coolant seepage leading to insulation failure and short circuits and other accidents.

[0056] Furthermore, it should be noted that the cold plate proposed in this application can be applied to battery devices, which can serve as power sources for electrical equipment. These electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0057] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0058] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0059] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0060] Please refer to Figure 2 , Figure 2This is an exploded view of a battery device 100 provided in some embodiments of this application. In one embodiment of this application, the battery device 100 includes a housing 10, a battery cell 20, and a cold plate 30. The battery cell 20 and the cold plate 30 are both disposed inside the housing 10, and the cold plate 30 is provided with a cooling channel 311 and is configured to cool the battery cell 20.

[0061] The housing 10 provides space for the battery cells 20, serving to support and protect them. The housing 10 may include a top cover 11 and a bottom shell 12 that overlap each other, collectively defining the space for accommodating the battery cells 20. Both the top cover 11 and the bottom shell 12 may be hollow structures with an opening on one side, with the opening side of the top cover 11 fitting over the opening side of the bottom shell 12. Alternatively, the top cover 11 may be a plate structure. Furthermore, the housing 10 formed by the top cover 11 and the bottom shell 12 can have various shapes, such as a cylinder or a cuboid.

[0062] The battery cell 20 can be used to store electrical energy. The number of battery cells 20 can be at least two, and these at least two battery cells 20 can be connected in series, parallel, or in a mixed configuration to form a module. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Therefore, the battery device 100 may also include other structures, such as a busbar, for realizing the electrical connection between at least two battery cells 20. Furthermore, to improve the energy density of the battery device 100, at least two battery cells 20 can be stacked in one direction to form a module, and the battery device 100 can stack at least two modules in another intersecting direction. In addition, the battery cell 20 can be a secondary battery or a primary battery. A secondary battery refers to a battery that can be recharged after the battery cell 20 has been discharged, allowing the active materials to be activated and reused. Further, the battery cell 20 can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Additionally, the battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0063] The cold plate 30 can be used to form a cooling channel 311, through which coolant flows to cool and dissipate heat from the battery cells 20. The cold plate 30 can extend along the stacking direction of the battery cells 20, so that one cold plate 30 can cool and dissipate heat from at least two battery cells 20, thereby reducing the number of cold plates 30 required. Furthermore, to improve the heat dissipation effect on the battery cells 20, some cold plates 30 can be located between the housing 10 and the modules formed by stacking some battery cells 20, while other cold plates 30 can be located between two modules formed by stacking battery cells 20.

[0064] Please refer to Figure 3 , Figure 3This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up a battery device 100. In one embodiment of this application, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0065] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0066] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0067] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the electrode terminals 21a to form a current loop.

[0068] The structure of the cold plate 30 proposed in this application will be explained and illustrated below with examples:

[0069] Please refer to the reference. Figure 2 as well as Figures 4 to 6 The cold plate 30 includes a plate body 31 and an anti-permeability layer 33. The plate body 31 is provided with a cooling channel 311. The anti-permeability layer 33 is provided on the outer surface of the plate body 31 and is configured to block the penetration of coolant located in the cooling channel 311.

[0070] The plate body 31 can serve as the main structure of the cold plate 30, forming a cooling channel 311 through which coolant flows, thereby removing the heat generated by the battery cell 20 during operation. The coolant can be water, or a mixture of water and ethylene glycol, etc.; this application does not limit the type of coolant. Furthermore, as described above, the plate body 31 can be an elongated plate structure extending along at least the stacking direction of the battery cell 20. In this case, the shape of the cold plate 30 can be rectangular in the stacking direction of the cold plate 30 and the battery cell 20. In a cross-section perpendicular to the extension direction of the plate body 31, the cross-section of the plate body 31 can be rectangular, or it can be oblong, etc. In this case, the cooling channel 311 can be extended along the direction of the plate body 31, making the extension shape of the cooling channel 311 simpler, thus improving the ease of its processing and forming. Furthermore, in some embodiments, the cross-sectional shape of the cooling channel 311 is the same as that of the plate body 31, so that the wall thickness of the plate body 31 can be more uniform, thereby improving the utilization rate of the space inside the plate body 31. Of course, in other embodiments, the cooling channel 311 can also be extended along a fold line or arc within the plate body 31, and this application does not limit the extension shape of the cooling channel 311. In addition, the material of the plate body 31 can be polyphenylene sulfide, so that when the coolant contains chemical substances, the plate body 31 can have good chemical corrosion resistance and improve its service life; at the same time, it also makes the plate body 31 have good extrusion processing performance, thereby improving its processing convenience. Of course, in other embodiments, the material of the plate body 31 can also be polyphenylene sulfide, etc., and this application does not limit the material of the plate body 31. In addition, the plate body 31 can also be provided with a liquid outlet 3121 as described below, so that the coolant can enter and exit the cooling channel 311.

[0071] The anti-permeability layer 33 can be used to block the permeation of coolant in the cooling channel 311, reducing the risk of coolant leakage and subsequent electrical short circuit. The anti-permeability layer 33 can be disposed on the inner surface of the plate body 31, or it can be disposed on the outer surface of the plate body 31.

[0072] The technical solution of this application sets the cold plate 30 as including the plate body 31 and the anti-penetration layer 33 located on the plate body 31. The anti-penetration layer 33 can block the penetration of coolant in the cooling channel 311 located in the plate body 31, improve the anti-penetration performance of the cold plate to the coolant 30, and reduce the possibility of coolant penetrating to the outside of the cold plate 30, causing insulation failure and short circuit.

[0073] In one embodiment of this application, the anti-permeability layer 33 is disposed on the outer surface of the plate body 31.

[0074] In this embodiment, the anti-permeability layer 33 is disposed on the outside of the plate body 31, so that the arrangement of the anti-permeability layer 33 is not affected by the size of the space in the cooling channel 311 of the plate body 31, thereby improving the convenience of arranging the anti-permeability layer 33.

[0075] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the outer surface of the plate body 31 includes two end faces 312 and a side peripheral face 313. The two end faces 312 are arranged at intervals relative to each other, and the end faces 312 are provided with liquid inlets 3121 that connect to the cooling channel 311. The side peripheral face 313 connects the two end faces 312, and the anti-permeability layer 33 is provided on the side peripheral face 313.

[0076] When the plate body 31 extends along the stacking direction of at least two battery cells 20 as described above, the two end faces 312 can be located at both ends in the extending direction of the plate body 31, while the side peripheral face 313 is located between the two end faces 312. The side peripheral face 313 can include two opposing large faces and two opposing small faces. The large faces can be used to abut against the battery cells 20, and the small faces can be used to connect the two large faces. When the cross-sectional shape of the plate body 31 is rectangular as described above, both the large and small faces can be planar. When the cross-sectional shape of the body is oblong as described above, the large faces can be planar, while the small faces can be curved. Furthermore, the plate body 31 can be provided with an opening on the side where the end faces 312 are located to form a liquid inlet 3121, thereby simplifying the structure of the plate body 31 and improving the ease of its processing and molding.

[0077] In this embodiment, the liquid inlet 3121 is disposed on the end face 312, while the anti-permeability layer 33 is disposed on the side peripheral face 313. This ensures that the liquid inlet 3121 does not affect the placement of the anti-permeability layer 33. Simultaneously, it also ensures that the battery cell 20 and the housing 10, corresponding to the larger surface of the side peripheral face 313 of the main body 31, do not affect the liquid inlet and outlet at the liquid inlet 3121, and facilitates a compact installation arrangement between the cold plate 30 and the battery cell 20. Of course, this application is not limited to this. In other embodiments, the liquid inlet 3121 may also be disposed on a smaller surface of the side peripheral face 313, or, when the larger surface of the side peripheral face 313 is larger than the side surface of the battery cell 20, the liquid inlet 3121 may be disposed at a position offset from the battery cell 20 within the larger surface of the side peripheral face 313.

[0078] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the impermeable layer 33 covers the entire peripheral surface 313.

[0079] In this embodiment, the anti-permeability layer 33 is configured to cover the entire side peripheral surface 313 of the plate body. On the one hand, this improves the anti-permeability effect of the cold plate 30; on the other hand, it makes the shape of the cold plate 30 more regular, thereby improving the convenience of its processing and forming. Of course, this application is not limited to this. In other embodiments, the anti-permeability layer 33 may only cover a portion of the side peripheral surface 313 of the plate body, for example, only covering the large surface of the side peripheral surface 313.

[0080] Please refer to the reference. Figure 4 and Figure 5 The plate body 31 is open at both ends with two end faces 312, which are configured as liquid outlets 3121.

[0081] The open design, or the area of ​​the liquid inlet 3121 and the cross-sectional area of ​​the cooling channel 311 are equal, makes the plate body 31 form a ring structure.

[0082] In this embodiment, the plate body 31 is set with open ends at both ends in the extension direction of the cooling channel 311 to form liquid outlets 3121, which makes the structure of the plate body 31 simpler and thus facilitates its processing and forming.

[0083] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, a reinforcing plate 314 is provided inside the plate body 31 and extends along the arrangement direction of the two end faces 312 to divide the cooling channel 311 into at least two side-by-side sub-channels 3111.

[0084] In this embodiment, the reinforcement plate 314 can, on the one hand, improve the structural strength of the plate body 31, thereby reducing the possibility of it being damaged by compression. On the other hand, it can also divide the cooling channel 311 into at least two parallel sub-channels 3111, so that the coolant is evenly distributed in various positions within the cooling channel 311, increasing the heat dissipation area and improving the cooling effect on the battery cell 20.

[0085] Please refer to the reference. Figure 2 , Figure 4 as well as Figure 5In one embodiment of this application, the battery device 100 may further include an adapter 40, which may be installed on the end face 312 of the plate body 31 so that the liquid passage 41 inside the adapter 40 may communicate with the open liquid passage 3121 on the end face 312 of the plate body 31. In this case, coolant in the liquid passage 41 of one adapter 40 can enter at least two parallel sub-channels 3111 through the liquid passage 3121 at one end of the plate body 31, and then flow out through the liquid passage 3121 at the other end of the plate body 31. Furthermore, to simplify the cooling pipe arrangement, the adapters 40 on the same end of each cold plate 30 within the battery device 100 may be connected by pipes.

[0086] In one embodiment of this application, the anti-permeability layer 33 is made of ethylene-vinyl alcohol copolymer.

[0087] In this embodiment, an ethylene-vinyl alcohol copolymer is used to make the anti-permeability layer 33, while the coolant is typically water or a mixture of water and ethylene glycol. In this case, the ethylene-vinyl alcohol copolymer has high barrier properties against small molecules of water or ethylene glycol, thereby improving the anti-permeability effect on the coolant located within the cooling channel 311. Of course, in other embodiments, the anti-permeability layer 33 can also be made of polypropylene, polyetherimide, polytetrafluoroethylene, or polyimide, etc. This application does not limit the material type of the anti-permeability layer 33.

[0088] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the thickness d of the anti-permeability layer 33 is defined to satisfy the relationship: 50μm≤d≤100μm.

[0089] In this embodiment, setting the thickness d of the anti-permeability layer 33 to 50μm to 100μm ensures that the thickness of the anti-permeability layer 33 is not too small, which would affect the anti-permeability effect on the main body 31; at the same time, it also ensures that the thickness of the anti-permeability layer 33 is not too large, which would affect the heat transfer effect generated by the battery cell 20 during operation. That is, setting the thickness range of the anti-permeability layer 33 in this way can better balance the anti-permeability performance and heat dissipation performance of the cold plate 30. The thickness d of the anti-permeability layer 33 can be 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, or 100μm, or any value within the above range.

[0090] Please refer to the reference. Figure 5 and Figure 6 The cold plate 30 also includes an adhesive layer 35, which is disposed between the plate body 31 and the anti-permeability layer 33.

[0091] In this embodiment, by providing an adhesive layer 35, the anti-permeability layer 33 and the board body 31 are bonded together, which increases the connection area between the two and thus improves the stability of the connection between the anti-permeability layer 33 and the board body 31. Moreover, it does not damage the structure of the anti-permeability layer 33 and the board body 31 themselves.

[0092] In one embodiment of this application, the adhesive layer 35 can be an adhesive, such as a polar plastic, a silane coupling agent, or a siloxane coupling agent, so that it can be directly coated on the board body 31, thereby improving the convenience of arranging the adhesive layer 35. Of course, this application is not limited to this; in other embodiments, the adhesive layer 35 can also be double-sided adhesive.

[0093] Please refer to the reference. Figure 2 as well as Figures 4 to 6 In one embodiment of this application, the cold plate 30 includes a plate body 31 and an anti-permeability layer 33. The plate body 31 has a cooling channel 311. The anti-permeability layer 33 is disposed on the plate body 31 and configured to block the permeation of coolant located within the cooling channel 311. The anti-permeability layer 33 is disposed on the outer surface of the plate body 31. The outer surface of the plate body 31 includes two end faces 312 and a side peripheral face 313. The two end faces 312 are spaced apart from each other and have liquid inlets 3121 communicating with the cooling channel 311. The side peripheral face 313 connects the two end faces 312, and a portion of the side peripheral face 313 is disposed opposite to the battery cell 20. The anti-permeability layer 33 is disposed on the side peripheral face 313. The anti-permeability layer 33 covers the entire side peripheral face 313. The plate body 31 is open at both ends where the two end faces 312 are located, configured as liquid inlets 3121. The cold plate 30 also includes a reinforcing plate 314, which is disposed within the cooling channel 311 and extends along the arrangement direction of the two end faces 312 to divide the cooling channel 311 into at least two parallel sub-channels 3111. The anti-permeability layer 33 is made of ethylene-vinyl alcohol copolymer; the thickness d of the anti-permeability layer 33 is defined to satisfy the relationship: 50μm≤d≤100μm; the cold plate 30 also includes an adhesive layer 35, which is disposed between the plate body 31 and the anti-permeability layer 33.

[0094] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: Box; A battery cell, wherein the battery cell is disposed within the housing; as well as A cold plate, which is disposed inside the housing and configured to cool the individual battery cells; The cold plate includes a plate body and an anti-permeability layer. The plate body has a cooling channel, and the anti-permeability layer is disposed in the plate body and configured to block the penetration of coolant located in the cooling channel.

2. The battery device as claimed in claim 1, characterized in that, The anti-permeability layer is provided on the outer surface of the main body of the plate.

3. The battery device as claimed in claim 2, characterized in that, The outer surface of the plate body includes: Two end faces, the two end faces being arranged opposite each other at a distance, each end face having a liquid passage connecting to the cooling channel; and A side peripheral surface, which connects the two end faces, is partially disposed opposite to the battery cell, and the anti-permeability layer is disposed on the side peripheral surface.

4. The battery device as claimed in claim 3, characterized in that, The impermeable layer covers the entire peripheral surface.

5. The battery device as claimed in claim 3, characterized in that, The plate body is open at both ends, which are provided with the two end faces, to serve as the liquid inlets.

6. The battery device as claimed in claim 5, characterized in that, The cold plate also includes a reinforcing plate, which is disposed within the cooling channel and extends along the arrangement direction of the two end faces to divide the cooling channel into at least two side-by-side sub-channels.

7. The battery device according to any one of claims 1 to 6, characterized in that, The impermeable layer is made of ethylene-vinyl alcohol copolymer, polypropylene, polyetherimide, polytetrafluoroethylene, or polyimide; And / or, define the thickness d of the impermeable layer to satisfy the relationship: 50μm≤d≤100μm; And / or, the cold plate further includes an adhesive layer disposed between the plate body and the anti-permeability layer.

8. A cold plate, configured to cool individual battery cells, characterized in that, The cold plate includes: The plate body, wherein a cooling channel is provided within the plate body; and An anti-permeability layer is disposed on the plate body and configured to block the penetration of coolant located in the cooling channel.

9. The cold plate as described in claim 8, characterized in that, The anti-permeability layer is made of ethylene-vinyl alcohol copolymer; And / or, define the thickness d of the impermeable layer to satisfy the relationship: 50μm≤d≤100μm; And / or, the cold plate further includes an adhesive layer, which is disposed between the plate body and the anti-permeability layer; And / or, the outer surface of the plate body includes two end faces and a side peripheral face, the two end faces are arranged opposite to each other and spaced apart, the end faces are provided with liquid inlets communicating with the cooling channel; the side peripheral face connects the two end faces, a portion of the side peripheral face is arranged opposite to the battery cell, the anti-permeability layer is provided on the side peripheral face and covers the entire side peripheral face; And / or, the plate body is provided with a reinforcing plate, which extends along the extension direction of the cooling channel to divide the cooling channel into at least two side-by-side sub-channels.

10. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 7.

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