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 propped against the battery monomers; the cold plate comprises a plate main body and a wear-resistant layer, a cooling channel is arranged in the plate main body, and the wear-resistant layer is arranged on the outer surface of the plate main body and at least partially located between the plate main body and the battery monomers. According to the technical scheme, the risk of liquid leakage caused by the fact that the cold plate is worn through can be 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, battery devices in related technologies inevitably encounter vibration conditions during use. In such cases, the individual battery cells can easily cause significant friction against the cold plate, leading to the risk of the cold plate being worn through and leaking. Utility Model Content

[0004] The main objective of this application is to provide a battery device designed to reduce the risk of leakage due to wear-through of the cold plate.

[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] The cold plate is located inside the casing and abuts against the individual battery cells;

[0009] The cold plate includes a plate body and a wear-resistant layer. The plate body has a cooling channel inside, and the wear-resistant layer is located on the outer surface of the plate body and is at least partially located between the plate body and the battery cell.

[0010] The battery device of this application comprises a cold plate consisting of a plate body and a wear-resistant layer on the outer surface of the plate body, with the wear-resistant layer at least partially located between the plate body and the battery cells. This allows the cold plate to contact the battery cells through the wear-resistant layer. The wear-resistant layer reduces the coefficient of friction on the outer surface of the cold plate, resulting in lower frictional wear between the battery cells and the cold plate, thereby reducing the risk of the cold plate being worn through and leaking.

[0011] In some embodiments, the wear-resistant layer is made of polyphenylene oxide or polyketimide;

[0012] And / or, define the thickness d1 of the wear-resistant layer, satisfying the relationship: 50μm≤d1≤100μm;

[0013] And / or, the wear-resistant layer and the main body of the plate are bonded together.

[0014] By using polyphenylene oxide or polyketimide as the material for the wear-resistant layer, excellent wear resistance is achieved, further enhancing the wear resistance of the cold-rolled steel sheet. The appropriate thickness of the wear-resistant layer effectively balances the wear resistance and heat dissipation performance of the cold-rolled steel sheet. Adhesive bonding between the wear-resistant layer and the main body of the sheet improves the stability of the connection without damaging the structure of either the wear-resistant layer or the main body.

[0015] In some embodiments, the cold plate further includes an anti-permeability layer, which is disposed between the plate body and the wear-resistant layer;

[0016] Alternatively, the anti-permeability layer can be placed on the inner surface of the main body of the board.

[0017] The anti-permeability layer can block the penetration of coolant, thereby reducing the possibility of coolant in the cooling channel seeping to the outside of the cold plate and causing insulation failure and short circuit.

[0018] In some embodiments, the outer surface of the plate body includes:

[0019] Two end faces, spaced apart from each other, each end face having a liquid outlet connecting to a cooling channel; and

[0020] The side circumferential surface connects the two end faces. When the anti-permeability layer is located between the main body of the board and the wear-resistant layer, both the wear-resistant layer and the anti-permeability layer are located on the side circumferential surface.

[0021] By placing the liquid inlet on the end face and the wear-resistant layer and anti-permeability layer on the side circumferential face, the liquid inlet will not affect the placement of the wear-resistant layer and anti-permeability layer.

[0022] In some embodiments, the impermeable layer covers the entire peripheral surface, and the abrasion-resistant layer covers the entire impermeable layer.

[0023] Covering the entire side and perimeter of the plate with both the anti-permeability layer and the wear-resistant layer can improve the wear resistance and anti-permeability of the cold-rolled plate; at the same time, it can also make the shape of the cold-rolled plate more regular, which in turn makes it easier to process and shape.

[0024] In some embodiments, the cold plate further includes a first adhesive layer disposed between the wear-resistant layer and the anti-permeability layer;

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

[0026] By adding a first adhesive layer, the connection area between the wear-resistant layer and the anti-permeability layer can be increased, thereby improving the stability of the connection between them. Furthermore, it does not damage the structure of the wear-resistant layer or the anti-permeability layer itself. Similarly, by adding a second adhesive layer, the connection area between the anti-permeability layer and the main board body can be increased, thereby improving the stability of the connection between them. Again, it does not damage the structure of the anti-permeability layer or the main board body itself.

[0027] In some embodiments, the first adhesive layer is glue;

[0028] And / or, the second adhesive layer is glue.

[0029] By using adhesive as the first and second bonding layers, it is possible to apply the adhesive directly to the anti-permeability layer and the main body of the board, which improves the convenience of arranging the first and second bonding layers.

[0030] In some embodiments, the thickness of the wear-resistant layer is equal to the thickness of the anti-permeability layer;

[0031] And / or, the material of the impermeable layer is ethylene-vinyl alcohol copolymer, polypropylene, polyetherimide, polytetrafluoroethylene or polyimide;

[0032] And / or, define the thickness d2 of the impermeable layer, satisfying the relationship: 50μm≤d2≤100μm.

[0033] Setting the thickness of the wear-resistant layer and the anti-permeability layer to be equal ensures that both can achieve suitable thicknesses within a limited range. This material choice for the anti-permeability layer provides high barrier properties against small molecules like water or ethylene glycol, thus improving its ability to prevent coolant penetration within the cooling channels. The thickness of the anti-permeability layer also effectively balances the anti-permeability performance and heat dissipation performance of the cold plate.

[0034] This application also proposes a cold plate configured to abut against a battery cell, the cold plate comprising:

[0035] The main body of the plate has cooling channels inside; and

[0036] The wear-resistant layer is located on the outer surface of the main body of the plate and is at least partially located between the main body of the plate and the battery cell.

[0037] This design of the cold plate allows it to contact the battery cells through the wear-resistant layer. The wear-resistant layer reduces the coefficient of friction on the outer surface of the cold plate, resulting in lower frictional wear from the battery cells and thus reducing the risk of the cold plate being worn through and leaking.

[0038] In some embodiments, the wear-resistant layer is made of polyphenylene oxide or polyketimide;

[0039] And / or, define the thickness d1 of the wear-resistant layer, satisfying the relationship: 50μm≤d1≤100μm;

[0040] And / or, the wear-resistant layer and the main body of the plate are bonded together;

[0041] 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 the end faces are provided with liquid inlets that connect to the cooling channels; the side peripheral face connects the two end faces, and a wear-resistant layer is provided on the side peripheral face and covers the entire side peripheral face;

[0042] And / or, the cold-rolled steel plate also includes an anti-permeability layer, which is disposed between the main body of the plate and the wear-resistant layer; or, the anti-permeability layer is disposed on the inner surface of the main body of the plate.

[0043] And / or, the plate body is provided with a reinforcing plate to divide the cooling channel into at least two side-by-side sub-channels.

[0044] By using polyphenylene oxide or polyketimide as the material for the wear-resistant layer, superior wear resistance is achieved, further enhancing the wear resistance of the cold plate. The thickness of the wear-resistant layer allows for a good balance between wear resistance and heat dissipation. Adhesive bonding between the wear-resistant layer and the main plate improves the stability of the connection without damaging the structure of either. Covering the entire side perimeter with the wear-resistant layer further enhances the wear resistance of the cold plate. An anti-permeability layer prevents coolant penetration, reducing the possibility of coolant seeping out of the cooling channels and causing insulation failure and short circuits. The reinforcing plate increases the structural strength of the main plate, reducing the likelihood of damage from compression. Furthermore, the cooling channels can be divided into at least two parallel sub-channels to ensure even distribution of coolant within the channels, increasing the heat dissipation area and improving cooling efficiency for the individual battery cells.

[0045] This application also proposes an electrical device including the aforementioned battery device. Attached Figure Description

[0046] 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.

[0047] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0048] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0049] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0050] Figure 4 for Figure 2 A partial structural diagram of the battery device;

[0051] Figure 5 for Figure 4 Another perspective view of the intercooler plate;

[0052] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0053] Explanation of icon numbers:

[0054] 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; 32, Wear-resistant layer; 33, Anti-permeability layer; 34, First adhesive layer; 35, Second adhesive layer; 40, Adapter; 41, Liquid inlet; 200, Controller; 300, Motor.

[0055] 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

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] However, battery devices in related technologies inevitably encounter vibration conditions during use, such as when installed in vehicles or other electrical equipment. In such cases, the individual battery cells can easily cause significant friction against the cold plate, leading to the risk of the cold plate being worn through and leaking.

[0063] Therefore, based on the above considerations, in order to solve the problem that the cold plate in the battery device in the related technology is easily worn through by the battery cells and leaks, this application proposes a novel cold plate. The cold plate is configured to include a plate body and a wear-resistant layer located on the outer side of the plate body. This wear-resistant layer reduces the coefficient of friction on the outer surface of the cold plate, thereby enhancing the wear resistance of the cold plate and reducing frictional wear, thus minimizing the occurrence of the cold plate being worn through and leaking.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Please refer to Figure 2 , Figure 2 This 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 abuts against the battery cell 20.

[0069] 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.

[0070] 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, the battery cell 20 can be a secondary battery or a primary battery. A secondary battery is a battery that can be recharged after discharge to activate the active materials and continue to be used. 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.

[0071] 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.

[0072] Please refer to Figure 3 , Figure 3 This 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The structure of the cold plate 30 proposed in this application will be explained and illustrated below with examples:

[0077] Please refer to the reference. Figure 2 as well as Figures 4 to 6 The cold plate 30 includes a plate body 31 and a wear-resistant layer 32. The plate body 31 is provided with a cooling channel 311. The wear-resistant layer 32 is provided on the outer surface of the plate body 31 and is at least partially located between the plate body 31 and the battery cell 20.

[0078] 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 length 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 inside 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 flow out of the cooling channel 311.

[0079] The wear-resistant layer 32 can be used to reduce the coefficient of friction on the outer surface of the plate body 31, thereby reducing wear between the cold plate 30 and the battery cell 20. The wear-resistant layer 32 can be provided only in the area of ​​the plate body 31 that abuts against the battery cell 20, or it can be further provided in other positions on the plate body 31.

[0080] The technical solution of this application configures the cold plate 30 as including a plate body 31 and a wear-resistant layer 32 located on the outer surface of the plate body 31, with the wear-resistant layer 32 at least partially located between the plate body 31 and the battery cell 20, allowing the cold plate 30 to contact the battery cell 20 through the wear-resistant layer 32. The wear-resistant layer 32 reduces the coefficient of friction on the outer surface of the cold plate 30, resulting in lower frictional wear from the battery cell 20 on the cold plate 30, thereby reducing the risk of the cold plate 30 being worn through and leaking liquid.

[0081] In one embodiment of this application, the wear-resistant layer 32 may be made of polyphenylene oxide.

[0082] In this embodiment, the wear-resistant layer 32 is made of polyphenylene oxide, which gives it superior wear resistance, thereby further improving the wear resistance of the cold plate 30. Simultaneously, the wear-resistant layer 32 also possesses good electrical insulation properties, thus helping to reduce the occurrence of leakage and short-circuit faults.

[0083] Of course, this application is not limited to this. In one embodiment of this application, the material of the wear-resistant layer 32 can also be polyketimide. In this case, the wear-resistant layer 32 can also have excellent wear resistance. At the same time, the wear-resistant layer 32 can also have good barrier properties, so as to reduce the possibility of coolant in the cooling channel 311 penetrating to the outside of the cold plate 30 and causing insulation failure and short circuit. Alternatively, in some embodiments, the wear-resistant layer 32 can also be polytetrafluoroethylene, ultra-high molecular weight polyethylene, or wear-resistant rubber, etc. This application does not limit the material type of the wear-resistant layer 32.

[0084] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the thickness d1 of the wear-resistant layer 32 is defined to satisfy the relationship: 50μm≤d1≤100μm.

[0085] In this embodiment, the thickness d1 of the wear-resistant layer 32 is set to between 50μm and 100μm. This ensures that the thickness of the wear-resistant layer 32 is not too small, which would affect the wear-resistant protection effect on the main body 31; at the same time, it also ensures that the thickness of the wear-resistant layer 32 is not too large, which would affect the heat transfer effect generated by the battery cell 20 during operation. That is, this setting of the thickness range of the wear-resistant layer 32 can better balance the wear resistance and heat dissipation performance of the cold plate 30. The thickness d1 of the wear-resistant layer 32 can be 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, or 100μm, or any value within the above range.

[0086] In one embodiment of this application, the wear-resistant layer 32 and the plate body 31 are bonded together.

[0087] In this embodiment, the wear-resistant layer 32 and the main body 31 are bonded together, which increases the connection area between them and thus improves the stability of the connection between the wear-resistant layer 32 and the main body 31. Furthermore, it does not damage the structure of the wear-resistant layer 32 and the main body 31 themselves. Of course, in other embodiments, the wear-resistant layer 32 can also be fixed with screws; this application does not limit the connection method between the wear-resistant layer 32 and the main body 31.

[0088] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the cold plate 30 further includes an anti-permeability layer 33, which is disposed between the plate body 31 and the wear-resistant layer 32.

[0089] In this embodiment, the anti-permeability layer 33 acts as a barrier to coolant penetration, reducing the possibility of coolant seeping out of the cooling channel 311 and causing insulation failure and short circuit due to the cold plate 30. Furthermore, by placing the anti-permeability layer 33 between the plate body 31 and the wear-resistant layer 32, the anti-permeability layer 33 is also located on the outer side of the plate body 31, thus improving the convenience of its placement. Of course, this application is not limited to this; in other embodiments, the anti-permeability layer 33 can also be placed on the inner surface of the plate body 31, i.e., within the cooling channel 311.

[0090] In one embodiment of this application, the anti-permeability layer 33 is made of ethylene-vinyl alcohol copolymer.

[0091] 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.

[0092] 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. When the anti-permeability layer 33 is disposed between the plate body 31 and the wear-resistant layer 32, both the wear-resistant layer 32 and the anti-permeability layer 33 are disposed on the side peripheral face 313.

[0093] 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.

[0094] In this embodiment, the liquid inlet 3121 is disposed on the end face 312, while the wear-resistant layer 32 and the anti-permeability layer 33 are disposed on the side peripheral face 313. This ensures that the liquid inlet 3121 does not affect the placement of the wear-resistant layer 32 and 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.

[0095] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the anti-permeability layer 33 covers the entire side peripheral surface 313, and the wear-resistant layer 32 covers the entire anti-permeability layer 33.

[0096] In this embodiment, both the anti-permeability layer 33 and the wear-resistant layer 32 cover the entire side peripheral surface 313 of the plate body. This improves the wear resistance and anti-permeability of the cold plate 30 and makes its shape more regular, thus facilitating its processing and forming. However, this application is not limited to this. In other embodiments, the anti-permeability layer 33 and the wear-resistant layer 32 may only cover a portion of the side peripheral surface 313 of the plate body, for example, only the larger surface area of ​​the side peripheral surface 313.

[0097] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the cold plate 30 further includes a first adhesive layer 34, which is disposed between the wear-resistant layer 32 and the anti-permeability layer 33.

[0098] In this embodiment, by providing a first adhesive layer 34 to bond the wear-resistant layer 32 and the anti-permeability layer 33, the connection area between the two can be increased, thereby improving the stability of the connection between the wear-resistant layer 32 and the anti-permeability layer 33. Moreover, it does not damage the structure of the wear-resistant layer 32 and the anti-permeability layer 33 themselves.

[0099] Similarly, please refer to the following: Figure 5 and Figure 6 In one embodiment of this application, the cold plate 30 further includes a second adhesive layer 35, which is disposed between the anti-permeability layer 33 and the plate body 31 to increase the connection area between the anti-permeability layer 33 and the plate body 31, thereby improving the stability of the connection between the anti-permeability layer 33 and the plate body 31. Moreover, it does not damage the structure of the anti-permeability layer 33 and the plate body 31 themselves.

[0100] In one embodiment of this application, the first adhesive layer 34 and the second adhesive layer 35 can be adhesives, such as polar plastics, silane coupling agents, or siloxane coupling agents, so that they can be directly coated on the anti-permeability layer 33 and the main body 31, respectively, thereby improving the convenience of arranging the first adhesive layer 34 and the second adhesive layer 35. Of course, this application is not limited to this; in other embodiments, the first adhesive layer 34 and the second adhesive layer 35 can also be double-sided adhesive.

[0101] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the thickness d2 of the anti-permeability layer 33 is defined to satisfy the relationship: 50μm≤d2≤100μm.

[0102] In this embodiment, the thickness d2 of the anti-permeability layer 33 is set to between 50μm and 100μm. This 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, this setting of the thickness range of the anti-permeability layer 33 can better balance the anti-permeability performance and heat dissipation performance of the cold plate 30. The thickness d2 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.

[0103] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the thickness of the wear-resistant layer 32 is equal to the thickness of the anti-permeability layer 33.

[0104] In this embodiment, the thicknesses of the wear-resistant layer 32 and the anti-permeability layer 33 are set to be equal, so that both can have a suitable thickness within a limited thickness range. Of course, this application is not limited to this; in other embodiments, the thickness of the wear-resistant layer 32 may also be set to be greater than or less than the thickness of the anti-permeability layer 33.

[0105] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, a reinforcing plate 314 is provided in the plate body 31 to divide the cooling channel 311 into at least two side-by-side sub-channels 3111.

[0106] 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.

[0107] Please refer to the reference. Figure 2 , Figure 4 as well as Figure 5 In 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.

[0108] Please refer to the reference. Figure 2 as well as Figures 4 to 6In one embodiment of this application, the cold plate 30 includes a plate body 31 and a wear-resistant layer 32. The plate body 31 is provided with a cooling channel 311, and the wear-resistant layer 32 is disposed on the outer surface of the plate body 31 and is at least partially located between the plate body 31 and the battery cell 20. The wear-resistant layer 32 is made of polyphenylene oxide or polyketimide; the thickness d1 of the wear-resistant layer 32 is defined to satisfy the relationship: 50μm≤d1≤100μm; the cold plate 30 also includes an anti-permeability layer 33, which is disposed between the plate body 31 and the wear-resistant layer 32; 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 relatively spaced apart, and the end faces 312 are provided with liquid outlets 3121 that connect to the cooling channel 311; the side peripheral face 313 connects the two end faces 312. When the anti-permeability layer 33 is disposed between the plate body 31 and the wear-resistant layer 32, both the wear-resistant layer 32 and the anti-permeability layer 33 are disposed on the side peripheral face 313. The anti-permeability layer 33 covers the entire side peripheral face 313, and the wear-resistant layer 32 covers the entire anti-permeability layer 33. The cold plate 30 also includes a first adhesive layer 34, which is disposed between the wear-resistant layer 32 and the anti-permeability layer 33; the cold plate 30 also includes a second adhesive layer 35, which is disposed between the anti-permeability layer 33 and the plate body 31. The first adhesive layer 34 is glue; the second adhesive layer 35 is glue. The anti-permeability layer 33 is made of ethylene-vinyl alcohol copolymer; the thickness d2 of the anti-permeability layer 33 is defined to satisfy the relationship: 50μm≤d2≤100μm. The plate body 31 is provided with a reinforcing plate 314 to divide the cooling channel 311 into at least two parallel sub-channels 3111.

[0109] 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 is disposed inside the housing and abuts against the battery cell; The cold plate includes a plate body and a wear-resistant layer. The plate body has a cooling channel inside. The wear-resistant layer is disposed on the outer surface of the plate body and is at least partially located between the plate body and the battery cell.

2. The battery device as claimed in claim 1, characterized in that, The wear-resistant layer is made of polyphenylene oxide or polyketide-imide; And / or, define the thickness d1 of the wear-resistant layer to satisfy the relationship: 50μm≤d1≤100μm; And / or, the wear-resistant layer and the plate body are bonded together.

3. The battery device as described in claim 1 or 2, characterized in that, The cold plate also includes an anti-permeability layer, which is disposed between the plate body and the wear-resistant layer; Alternatively, the anti-permeability layer may be disposed on the inner surface of the main body of the plate.

4. The battery device as claimed in claim 3, 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 The side circumferential surface connects the two end faces. When the anti-permeability layer is disposed between the plate body and the wear-resistant layer, both the wear-resistant layer and the anti-permeability layer are disposed on the side circumferential surface.

5. The battery device as claimed in claim 4, characterized in that, The impermeable layer covers the entire side circumferential surface, and the wear-resistant layer covers the entire impermeable layer.

6. The battery device as claimed in claim 4, characterized in that, The cold plate further includes a first adhesive layer, which is disposed between the wear-resistant layer and the anti-permeability layer; And / or, the cold plate further includes a second adhesive layer, which is disposed between the anti-permeability layer and the plate body.

7. The battery device as claimed in claim 6, characterized in that, The first adhesive layer is glue; And / or, the second adhesive layer is glue.

8. The battery device as claimed in claim 3, characterized in that, The thickness of the wear-resistant layer is equal to the thickness of the anti-permeability layer; And / or, the material of the impermeable layer is ethylene-vinyl alcohol copolymer, polypropylene, polyetherimide, polytetrafluoroethylene or polyimide; And / or, define the thickness d2 of the impermeable layer to satisfy the relationship: 50μm≤d2≤100μm.

9. A cold plate configured to abut against a battery cell, characterized in that, The cold plate includes: The plate body, wherein a cooling channel is provided within the plate body; and A wear-resistant layer is disposed on the outer surface of the plate body and is at least partially located between the plate body and the battery cell.

10. The cold plate as described in claim 9, characterized in that, The wear-resistant layer is made of polyphenylene oxide or polyketide-imide; And / or, define the thickness d1 of the wear-resistant layer to satisfy the relationship: 50μm≤d1≤100μm; And / or, the wear-resistant layer and the plate body are bonded together; 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, the wear-resistant layer is provided on the side peripheral face and covers the entire side peripheral face; And / or, the cold plate further includes an anti-permeability layer, which is disposed between the plate body and the wear-resistant layer; or, the anti-permeability layer is disposed on the inner surface of the plate body; And / or, the plate body is provided with a reinforcing plate to divide the cooling channel into at least two side-by-side sub-channels.

11. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 8.

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