Liquid-cooling plate assembly, thermal management component, battery, and electric device

Abstract

A liquid-cooling plate assembly, a thermal management component, a battery, and an electric device, which belong to the technical field of batteries. The liquid-cooling plate assembly comprises a heat exchange plate and a current collector, wherein a plurality of cooling channels are formed inside the heat exchange plate; the current collector is connected to an end of the heat exchange plate and is in communication with the plurality of cooling channels; and a first section of one of the current collector and the heat exchange plate is sleeved outside a second section of the other one of the current collector and the heat exchange plate, the first section is made of a transparent material, the second section is made of a light-absorbing material, and the surface of at least one of the first section and the second section facing the other one of the first section and the second section is provided with a connection compensation structure that is not flush with the surface.

Description

Liquid cooling plate assembly, thermal management components, battery and electrical device

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202420837167.2, filed on April 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and more specifically, to a liquid cooling plate assembly, a thermal management component, a battery, and an electrical device. Background Technology

[0004] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. A battery consists of a battery casing and multiple individual battery cells housed within it. With technological advancements, the market demand for fast charging has expanded, placing higher requirements on the battery's thermal management system.

[0005] Currently, liquid cooling plate assemblies are installed on the surface of battery cells to cool the battery cells. The liquid cooling plate assembly includes a heat exchange plate and a current collector connected to the heat exchange plate. In related technologies, both the heat exchange plate and the current collector are made of metal, and they are mostly connected by brazing. The welding quality is difficult to guarantee, and the connection between the heat exchange plate and the current collector is unreliable, which affects the subsequent use of the liquid cooling plate assembly.

[0006] Summary of the Invention

[0007] This application provides a liquid cooling plate assembly, a thermal management component, a battery, and an electrical device, which improves welding quality and thus enhances the connection reliability between the heat exchange plate and the current collector.

[0008] In a first aspect, embodiments of this application provide a liquid-cooled plate assembly, including:

[0009] A heat exchange plate, wherein multiple cooling channels are formed inside the heat exchange plate;

[0010] A heat exchanger is connected to the end of the heat exchange plate and communicates with the plurality of cooling channels;

[0011] In this embodiment, the first segment of one of the current collector and the heat exchange plate is sleeved outside the second segment of the other, and the first segment is made of a transparent material, the second segment is made of a light-absorbing material, and at least one of the first segment and the second segment has a connection compensation structure on the surface facing each other that is not flush with the surface.

[0012] In the above technical solution, by setting a connection compensation structure, the welded structure is formed by its own melting. No new material is introduced at the weld, which reduces welding quality problems such as flux creep and flux contamination caused by brazing, and at the same time improves the connection reliability of the first and second segments.

[0013] In some embodiments, the connection compensation structure extends circumferentially along the inner surface of the first segment, and / or the connection compensation structure extends circumferentially along the outer surface of the second segment.

[0014] In the above technical solution, the connection compensation structure is a closed ring to achieve annular sealing between the first segment and the second segment.

[0015] In some embodiments, the connection compensation structure includes a plurality of structures, which are arranged at intervals along the length of the heat exchange plate.

[0016] In the above technical solution, by setting multiple connection compensation structures, the interlocking connection between the first segment and the second segment can be achieved, further improving the stability and sealing effect of the connection and reducing coolant leakage from the connection between the first segment and the second segment.

[0017] In some embodiments, the first section of the current collector is sleeved on the second section of the heat exchange plate, and the current collector is provided with supporting ribs, which abut against the inner wall of the cooling channel.

[0018] In the above technical solution, by providing supporting ribs that abut against the inner wall of the cooling channel, the deformation of the second section of the heat exchange plate can be reduced.

[0019] In some embodiments, the support ribs include a plurality of ribs, which are spaced apart circumferentially along the inner surface of the first segment, and each of the plurality of cooling channels is provided with at least one of the support ribs.

[0020] In some embodiments, the first segment is provided with a limiting surface for abutting against the outer end face of the second segment.

[0021] In the above technical solution, by setting a limiting surface for stopping against the outer end face of the second segment, the movement of the second segment or the first segment is restricted, thereby protecting the heat exchange plate and the collector.

[0022] In some embodiments, the first section of the current collector is sleeved on the second section of the heat exchange plate;

[0023] The connection compensation structure located in the current collector protrudes from or is recessed into the inner surface of the first segment.

[0024] In some embodiments, the first section of the current collector is sleeved on the second section of the heat exchange plate;

[0025] The connection compensation structure located on the heat exchange plate is recessed on the outer surface of the second section.

[0026] In some embodiments, the first section of the current collector is sleeved on the second section of the heat exchange plate;

[0027] The connection compensation structure located in the current collector protrudes from the inner surface of the first section, and the connection compensation structure located in the heat exchange plate is recessed into the outer surface of the second section.

[0028] Thirdly, embodiments of this application provide a thermal management component, including a plurality of liquid cooling plate assemblies as described in any of the above embodiments, wherein the plurality of liquid cooling plate assemblies are arranged side by side and the current collectors of two adjacent liquid cooling plate assemblies are in communication.

[0029] Fourthly, embodiments of this application provide a battery, including a battery cell and a thermal management component as described in any of the above embodiments, wherein the heat exchange plate is disposed between two adjacent battery cells.

[0030] This application provides an electrical device including a battery as described in the above embodiments, the battery being used to provide electrical energy.

[0031] In the above technical solution, by setting an isolation component in the electrode assembly, the powder that may be generated in the bending part during the production process can be isolated, which can effectively reduce the risk of powder falling off the bending part, improve the production yield of the electrode assembly, improve the service life and stability of the electrode assembly, and help improve the service life and stability of the electrical device. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0034] Figure 2 is an exploded view of the battery structure provided in some embodiments of this application;

[0035] Figure 3 is a partial structural schematic diagram of a battery provided in some embodiments of this application;

[0036] Figure 4 is a schematic diagram of the structure of a liquid cooling plate assembly provided in some embodiments of this application;

[0037] Figure 5 is a partial structural schematic diagram of a liquid cooling plate assembly provided in some embodiments of this application;

[0038] Figure 6 is a cross-sectional view at point AA in Figure 5;

[0039] Figure 7 is a schematic diagram of the structure of a current collector provided in some embodiments of this application;

[0040] Figure 8 is a side view of a heat exchange plate provided in some embodiments of this application;

[0041] Figure 9 is a second partial structural schematic diagram of a liquid cooling plate assembly provided in some embodiments of this application;

[0042] Figure 10 is a cross-sectional view at point BB in Figure 9;

[0043] Figure 11 is a partial structural schematic diagram of a heat exchange plate provided in some embodiments of this application.

[0044] Figure label:

[0045] Vehicle 1, battery 10, housing 11, first housing body 111, second housing body 112, battery cell 12;

[0046] Liquid cooling plate assembly 13, heat exchange plate 131, cooling channel 1311, second section 1312, current collector 132, support rib 1321, limiting surface 1322, connecting pipe 1323, first section 1324, connecting compensation structure 133;

[0047] Motor 20, controller 30. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0054] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc., and the embodiments of this application are not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these types either.

[0055] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells or multiple battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] A battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0057] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0058] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. A battery consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, the battery faces high requirements in terms of both safety and cycle life.

[0059] With technological advancements, the market demand for fast battery charging is expanding, placing higher demands on battery thermal management systems. Currently, liquid cooling plate assemblies are installed on the surface of individual battery cells to cool them. These assemblies consist of a heat exchange plate and a current collector connected to the heat exchange plate. In related technologies, both the heat exchange plate and the current collector are made of metal, and they are mostly connected by brazing. This process is prone to welding quality issues such as flux contamination and flux creep, making it difficult to guarantee welding quality. The poor reliability of the connection between the heat exchange plate and the current collector affects the subsequent use of the liquid cooling plate assembly.

[0060] Based on the above considerations, in order to solve the problem of poor connection reliability between the heat exchange plate and the current collector through welding, which affects the subsequent use of the liquid cooling plate assembly, this application designs a liquid cooling plate assembly, including a heat exchange plate and a current collector. The heat exchange plate has multiple cooling channels formed inside. The current collector is connected to the end of the heat exchange plate and communicates with the multiple cooling channels. In this assembly, a first section of one of the current collector and the heat exchange plate is sleeved on the second section of the other. The first section is made of a transparent material, and the second section is made of a light-absorbing material. At least one of the first section and the second section has a connection compensation structure that is not flush with the surface facing each other.

[0061] In this liquid-cooled plate assembly, on the one hand, a transparent material is used to make the first section on the outside, and a light-absorbing material is used to make the second section on the inside. The laser beam can pass through the first section and radiate to heat the outer surface of the second section. The heat from the outer surface of the second section is transferred to the inner surface of the first section through thermal conduction, raising the temperature between the first and second sections. This causes a molten pool to form on the surfaces where the first and second sections are in contact. After laser welding, the molten material between the first and second sections solidifies, thus joining the heat exchange plate with the current collector without the need to introduce new flux, reducing welding quality problems such as flux creep and flux contamination caused by brazing. On the other hand, by providing a non-flush connection compensation structure on the surfaces of the first and second sections facing each other, the connection compensation structure melts differently from other surfaces during laser welding, forming an interlocking structure with other parts in shape, further improving the connection reliability of the first and second sections.

[0062] The liquid cooling plate assembly provided in this application embodiment, by setting a connection compensation structure, relies on its own melting to form a welded structure, and does not introduce new materials at the weld, reducing welding quality problems such as flux creep and flux contamination caused by brazing, while improving the connection reliability of the first and second segments.

[0063] The liquid-cooled plate assembly disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. Using the liquid-cooled plate assembly, thermal management components, and battery disclosed in this application improves the applicability of the liquid-cooled plate assembly and reduces its assembly difficulty.

[0064] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0066] Figure 1 shows a schematic diagram of a vehicle 1 according to one embodiment of this application. Vehicle 1 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 motor 20, a controller 30, and a battery 10 can be installed inside vehicle 1. The controller 30 controls the battery 10 to supply power to the motor 20. For example, the battery 10 can be installed at the bottom, front, or rear of vehicle 1. The battery 10 can be used to power vehicle 1. For example, the battery 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0067] To meet different power needs, the battery 10 may include multiple battery cells 12, which may be connected in series, in parallel, or in a mixed manner. Mixed connection refers to a combination of series and parallel connections.

[0068] Figure 2 shows an exploded view of the structure of a battery 10 according to an embodiment of this application. The battery 10 may include a housing 11 and a plurality of battery cells 12, the battery cells 12 being housed within the housing 11. The housing 11 provides assembly space for the battery cells 12, and the housing 11 may employ various structures. In some embodiments, the housing 11 may include a first housing body 111 and a second housing body 112, the first housing body 111 and the second housing body 112 overlapping each other, and the first housing body 111 and the second housing body 112 together defining an assembly space for accommodating the battery cells 12. The second housing body 112 may be a hollow structure open at one end, and the first housing body 111 may be a plate-like structure, the first housing body 111 covering the open side of the second housing body 112, so that the first housing body 111 and the second housing body 112 together define the assembly space; the first housing body 111 and the second housing body 112 may also both be hollow structures open on one side, the open side of the first housing body 111 covering the open side of the second housing body 112. Of course, the box 11 formed by the first box body 111 and the second box body 112 can be of various shapes, such as cylinder, cuboid, etc.

[0069] In battery 10, multiple battery cells 12 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 12 are connected in both series and parallel configurations. Multiple battery cells 12 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 12 is housed within housing 11. Alternatively, battery 10 can also consist of multiple battery cells 12 first connected in series, parallel, or in a mixed configuration to form a battery module, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within housing 11. Battery 10 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 12.

[0070] Each battery cell 12 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 12 can be cylindrical, flat, cuboid, or other shapes.

[0071] According to some embodiments of this application, referring to Figures 3 to 5, Figure 3 is a partial structural schematic diagram of the battery 10 provided in some embodiments of this application. Figure 3 only shows the cooperation form between the liquid cooling plate assembly 13 and the battery cell after multiple liquid cooling plate assemblies 13 are assembled. Figure 4 is a structural schematic diagram of the liquid cooling plate assembly 13 provided in some embodiments of this application. Figure 5 is one of the partial structural schematic diagrams of the liquid cooling plate assembly 13 provided in some embodiments of this application. This application provides a liquid cooling plate assembly 13, which includes a heat exchange plate 131 and a current collector 132.

[0072] Referring to Figures 6, 8, and 10, Figure 6 is a cross-sectional view at point AA in Figure 5, Figure 8 is a side view of a heat exchange plate provided in some embodiments of this application, and Figure 10 is a cross-sectional view at point BB in Figure 9. The heat exchange plate 131 has multiple cooling channels 1311 formed inside; a current collector 132 is connected to the end of the heat exchange plate 131 and communicates with the multiple cooling channels 1311; wherein, a first segment 1324 of one of the current collector 132 and the heat exchange plate 131 is sleeved on the second segment 1312 of the other, and the first segment 1324 is made of a transparent material, while the second segment 1312 is made of a light-absorbing material; at least one of the first segment 1324 and the second segment 1312 has a connection compensation structure 133 that is not flush with the surface on the surfaces facing each other.

[0073] Referring to Figure 8, multiple cooling channels 1311 extend along the length of the heat exchange plate 131 and are arranged side by side along the width of the heat exchange plate 131. The cooling channels 1311 are used for the flow of coolant, which can be water, ethanol or other coolants.

[0074] The collector 132 has a collection space, and the collector 132 also has an inlet and an outlet for the coolant to flow in and out. The collector 132 is connected to the heat exchange plate 131.

[0075] The collector 132 is disposed at the end of the heat exchange plate 131, and the collection space of the collector 132 is connected to multiple cooling channels 1311.

[0076] Referring to Figure 4, the heat exchanger 132 may include two heat exchangers 132, which are disposed at both ends of the heat exchange plate 131 along the length direction.

[0077] The collector 132 can be fitted outside the heat exchange plate 131, or the heat exchange plate 131 can be fitted outside the collector 132. The specific choice can be made according to the actual application.

[0078] One of the collectors 132 and the heat exchange plate 131 located in the outer ring has a first section 1324, and the one of the collectors 132 and the heat exchange plate 131 located in the inner ring has a second section 1312.

[0079] The first segment 1324 on the outer ring is made of a transparent material so that the laser beam passes through the first segment 1324 to radiate and heat the second segment 1312 on the inner ring. The second segment 1312 on the inner ring is made of a light-absorbing material so that the laser beam radiates and heats the outer surface of the second segment 1312, thereby raising the temperature between the first segment 1324 and the second segment 1312. This causes the opposing surfaces of the first segment 1324 and the second segment 1312 and the connecting compensation structure 133 to melt, thereby connecting the first segment 1324 and the second segment 1312.

[0080] The material of the first segment 1324 and the second segment 1312 can be one or more of polypropylene, polyamide, polyphthalamide and polyphenylene sulfide. The first segment 1324 can be a transparent part made of one or more of the above materials, and the second segment 1312 can be a light absorber made of one or more of the above materials.

[0081] The connecting compensation structure 133 is not flush with the surface it is located on. The connecting compensation structure 133 can protrude from the surface or be recessed into the surface, depending on the actual processing conditions and usage scenario. The connecting compensation structure 133 and the surface it is located on can be integrally formed and connected.

[0082] The laser beam radiates and heats the outer surface of the second segment 1312, causing the opposing surfaces of the first segment 1324 and the second segment 1312, as well as the connecting compensation structure 133, to melt. The degree of melting of the connecting compensation structure 133 differs from that of other planes, and it forms an interlocking structure with other solidified materials in terms of shape. At the same time, the connecting compensation structure 133 and its plane are integrally formed, while the connection method of other areas except for the connection between the connecting compensation structure 133 and its plane is to join after the molten pool cools and solidifies. That is, there are two connection methods on the opposing surfaces of the first segment 1324 and the second segment 1312. The connection forces of the two connection methods are different and staggered, which further improves the connection reliability of the first segment 1324 and the second segment 1312.

[0083] The connection compensation structure 133 can be installed in at least the following three locations:

[0084] Firstly, the connecting compensation structure 133 is disposed on the inner surface of the first segment 1324 facing the second segment 1312. The connecting compensation structure 133 is not flush with the inner surface of the first segment 1324. The connecting compensation structure 133 can protrude from or be recessed into the inner surface of the first segment 1324.

[0085] Secondly, the connecting compensation structure 133 is disposed on the outer surface of the second segment 1312 facing the first segment 1324. The connecting compensation structure 133 is not flush with the outer surface of the second segment 1312. The connecting compensation structure 133 can protrude from or be recessed into the outer surface of the second segment 1312.

[0086] Third, the first segment 1324 and the second segment 1312 are provided with a connecting compensation structure 133 on their surfaces facing each other. The connecting compensation structure 133 can protrude from or be recessed into its surface.

[0087] In this liquid-cooled plate assembly 13, a first segment 1324 located on the outer side is made of a transparent material, and a second segment 1312 located on the inner side is made of a light-absorbing material. The laser beam can pass through the first segment 1324 and radiate heat the outer surface of the second segment 1312. The heat from the outer surface of the second segment 1312 is transferred to the inner surface of the first segment 1324 through thermal conduction, raising the temperature between the first segment 1324 and the second segment 1312. This causes a molten pool to form on the contact surfaces of the first segment 1324 and the second segment 1312. After laser welding is completed, the first segment 1324... The material melted between section 24 and section 1312 solidifies, thereby joining the heat exchange plate 131 with the collector 132, avoiding welding quality problems such as flux creep caused by brazing. On the other hand, by providing a connection compensation structure 133 that is not flush with the surface on the surface facing each other in at least one of the first section 1324 and the second section 1312, the connection compensation structure 133 melts differently from other surfaces during laser welding, and forms an interlocking structure with other parts in shape, further improving the connection reliability between the heat exchange plate 131 and the collector 132.

[0088] The liquid cooling plate assembly 13 provided in this application embodiment, by setting a connection compensation structure 133, relies on its own melting to form a welded structure, and no new material is introduced at the weld, which reduces welding quality problems such as flux creep and flux contamination caused by brazing, while improving the connection reliability between the heat exchange plate 131 and the current collector 132.

[0089] In some embodiments, referring to Figures 7 and 11, the connecting compensation structure 133 extends circumferentially along the inner surface of the first segment 1324, and / or, the connecting compensation structure 133 extends circumferentially along the outer surface of the second segment 1312.

[0090] Among them, the connecting compensation structure 133 is a closed ring to achieve the annular seal of the first section 1324 and the second section 1312.

[0091] In this embodiment, the laser welding method can include a variety of methods. For example, laser welding can be spot welding, in which the laser beam moves along the extension direction of the connection compensation structure 133; or, laser welding can be annular laser welding, in which the sleeved first segment 1324 and second segment 1312 are placed in a welding device, the welding device having an annular beam adapted to it, and the annular beam moves along the length direction of the heat exchange plate 131.

[0092] In some embodiments, referring to Figures 6, 10 and 11, the connection compensation structure 133 includes a plurality of such structures, which are arranged at intervals along the length of the heat exchange plate 131.

[0093] In this embodiment, there can be two or more connection compensation structures 133, such as four or six. By setting multiple connection compensation structures 133, the interlocking connection between the first segment 1324 and the second segment 1312 can be achieved, further improving the stability and sealing effect of the connection and reducing the leakage of coolant from the connection between the first segment 1324 and the second segment 1312.

[0094] In some embodiments, referring to Figures 6, 7 and 10, the first section 1324 of the current collector 132 is sleeved on the second section 1312 of the heat exchange plate 131, and the current collector 132 is provided with a support rib 1321, which abuts against the inner wall of the cooling channel 1311.

[0095] In this embodiment, the first segment 1324 and the second segment 1312 are interference-fitted. Since the first segment 1324 is sleeved on the outside of the second segment 1312, the inner surface of the first segment 1324 exerts a compressive force on the second segment 1312, and the second segment 1312 tends to deform. By providing a support rib 1321 that abuts against the inner wall of the cooling channel 1311, the deformation of the second segment 1312 of the heat exchange plate 131 can be reduced.

[0096] At least a portion of the support rib 1321 is located within the first segment 1324. When the first segment 1324 is fitted onto the second segment 1312, at least a portion of the support rib 1321 extends into the cooling channel 1311 and abuts against the inner wall of the cooling channel 1311.

[0097] In some embodiments, referring to FIG7, the support ribs 1321 include a plurality of support ribs 1321, which are arranged circumferentially at intervals along the inner surface of the first segment 1324, and each of the plurality of cooling channels 1311 is provided with at least one support rib 1321.

[0098] Each cooling channel 1311 may be provided with one support rib 1321, or two or more support ribs 1321 may be provided, and at least part of the side wall of the support rib 1321 abuts against the inner wall of the cooling channel 1311.

[0099] In some embodiments, the sidewall of the support rib 1321 conforms to the inner wall of the cooling channel 1311 to further reduce the deformation of the second section 1312 of the heat exchange plate 131.

[0100] In some embodiments, along the width direction of the heat exchange plate 131, a support rib 1321 is provided at the end of the cooling channel 1311, and the support rib 1321 is similar in shape to the end cooling channel 1311; two support ribs 1321 are provided in the other cooling channels 1311, which are distributed vertically, and the two support ribs 1321 are respectively supported on opposite sides in the thickness direction of the cooling channel 1311.

[0101] It should be noted that, since the support rib 1321 has a certain thickness, the upper and lower walls of the support rib 1321 in the other cooling channels 1311 correspond one-to-one with the upper and lower sides of the cooling channels 1311, and the side walls of the support rib 1321 abut against at least a portion of the side walls of the cooling channels 1311.

[0102] In some embodiments, the first segment 1324 is provided with a limiting surface 1322 for abutting against the outer end face of the second segment 1312.

[0103] Referring to Figures 6, 7, and 10, the limiting surface 1322 is disposed between the first segment 1324 and the supporting rib 1321. When the first segment 1324 is fitted onto the second segment 1312, the second segment 1312 is located between the first segment 1324 and the supporting rib 1321. The outer end face of the second segment 1312 abuts against the limiting surface 1322 to restrict the second segment 1312 or the first segment 1324 from continuing to move, thereby protecting the heat exchange plate 131 and the collector 132.

[0104] In some embodiments, during laser welding, the molten material can flow along the gap between the outer end face of the second segment 1312 and the limiting surface 1322, and after solidification, the outer end face of the second segment 1312 and the limiting surface 1322 are combined to further improve the sealing effect and connection stability between the heat exchange plate 131 and the current collector 132.

[0105] In some embodiments, the first section 1324 of the current collector 132 is sleeved on the second section 1312 of the heat exchange plate 131, and the connection compensation structure 133 may have at least the following structural forms.

[0106] Firstly, the connecting compensation structure 133 located in the current collector 132 protrudes from the inner surface of the first segment 1324, and the outer surface of the second segment 1312 is a planar structure.

[0107] In this embodiment, after the molten material solidifies, it joins with the outer surface of the second section 1312, connecting the heat exchange plate 131 and the current collector 132. The protruding connection compensation structure 133 and other structures in the molten pool have different connection forces due to different melting degrees, forming a double interlocking effect and improving the stability of the connection.

[0108] Secondly, the connection compensation structure 133 located in the current collector 132 is recessed into the inner surface of the first segment 1324.

[0109] In this embodiment, the molten material flows into the recessed area to form an interlocking structure, increasing the stability of the connection between the heat exchange plate 131 and the current collector 132.

[0110] Third, the connection compensation structure 133 located on the heat exchange plate 131 is recessed on the outer surface of the second section 1312.

[0111] In this embodiment, a recessed connection compensation structure 133 is provided on the outer surface of the second section 1312 of the heat exchange plate 131, which makes the processing less difficult.

[0112] Fourth, the connection compensation structure 133 located in the current collector 132 protrudes from the inner surface of the first section 1324, and the connection compensation structure 133 located in the heat exchange plate 131 is recessed into the outer surface of the second section 1312.

[0113] In this embodiment, on the one hand, the molten material flows into the recessed area, which can reduce the overflow of molten material, improve the flatness of the surface of the liquid cooling plate assembly 13, and facilitate assembly with the battery cell 12; on the other hand, after the molten material solidifies, it joins the opposing surfaces of the first segment 1324 and the second segment 1312, connecting the heat exchange plate 131 and the current collector 132. The protruding connection compensation structure 133 and the recessed connection compensation structure have different melting degrees and connection forces than other structures in the molten pool, forming a double interlocking effect, which further improves the stability of the connection.

[0114] In the liquid cooling plate assembly 13 with this structure, by setting the connection compensation structure 133, the welded structure is formed by its own melting. No new material is introduced at the weld, which reduces welding quality problems such as flux creep and flux contamination caused by brazing. At the same time, it improves the connection reliability of the first segment 1324 and the second segment 1312.

[0115] According to some embodiments of this application, this application also provides a thermal management component, which includes a plurality of liquid cooling plate assemblies 13 as described in any of the above embodiments. The plurality of liquid cooling plate assemblies 13 are arranged side by side, and the current collectors 132 of two adjacent liquid cooling plate assemblies 13 are connected.

[0116] Referring to Figures 3 and 7, a connecting pipe 1323 is provided on the current collector 132, and multiple heat exchange plates 131 are arranged at intervals. Adjacent heat exchange plates 131 are connected by the connecting pipe 1323, and the battery cell 12 is arranged between adjacent heat exchange plates 131.

[0117] In the thermal management component of this structure, a plurality of liquid cooling plate assemblies 13 as described in any of the above embodiments are provided. The liquid cooling plate assembly 13 forms a welded structure by itself through the connection compensation structure 133. No new material is introduced at the weld, which reduces welding quality problems such as flux creep and flux contamination caused by brazing. At the same time, it improves the connection reliability between the heat exchange plate 131 and the current collector 132.

[0118] According to some embodiments of this application, this application also provides a battery 10, including a battery cell 12 and a thermal management component as described in the above embodiments, wherein a heat exchange plate 131 is disposed between two adjacent battery cells 12.

[0119] According to the embodiment of the present application, the battery 10 is equipped with a thermal management component, which includes a liquid cooling plate assembly 13. The liquid cooling plate assembly 13 is equipped with a connection compensation structure 133 and forms a welded structure by its own melting. No new material is introduced at the weld, which reduces welding quality problems such as flux creep and flux contamination caused by brazing. At the same time, it improves the connection reliability of the first segment 1324 and the second segment 1312.

[0120] According to some embodiments of this application, this application also provides an electrical device including a battery 10 as described above, the battery 10 being used to provide electrical energy.

[0121] The electrical device according to the embodiments of this application includes a liquid cooling plate assembly 13. The liquid cooling plate assembly 13 forms a welded structure by itself through the setting of a connection compensation structure 133. No new material is introduced at the weld, which reduces welding quality problems such as flux creep and flux contamination caused by brazing. At the same time, it improves the connection reliability between the heat exchange plate 131 and the current collector 132.

[0122] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0123] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid-cooled plate assembly, characterized in that, include: A heat exchange plate, wherein multiple cooling channels are formed inside the heat exchange plate; A heat exchanger is connected to the end of the heat exchange plate and communicates with the plurality of cooling channels; In this embodiment, the first segment of one of the current collector and the heat exchange plate is sleeved outside the second segment of the other, and the first segment is made of a transparent material, the second segment is made of a light-absorbing material, and at least one of the first segment and the second segment has a connection compensation structure on the surface facing each other that is not flush with the surface.

2. The liquid-cooled plate assembly according to claim 1, characterized in that, The connection compensation structure extends circumferentially along the inner surface of the first segment, and / or the connection compensation structure extends circumferentially along the outer surface of the second segment.

3. The liquid-cooled plate assembly according to claim 1 or 2, characterized in that, The connection compensation structure includes multiple structures, which are arranged at intervals along the length of the heat exchange plate.

4. The liquid-cooled plate assembly according to any one of claims 1-3, characterized in that, The first section of the current collector is sleeved on the second section of the heat exchange plate, and the current collector is provided with supporting ribs, which abut against the inner wall of the cooling channel.

5. The liquid-cooled plate assembly according to claim 4, characterized in that, The supporting ribs include a plurality of ribs, which are spaced apart circumferentially along the inner surface of the first segment, and each of the plurality of cooling channels is provided with at least one of the supporting ribs.

6. The liquid-cooled plate assembly according to any one of claims 1-5, characterized in that, The first segment is provided with a limiting surface for abutting against the outer end face of the second segment.

7. The liquid-cooled plate assembly according to any one of claims 1-5, characterized in that, The first section of the current collector is sleeved on the second section of the heat exchange plate; The connection compensation structure located in the current collector protrudes from or is recessed into the inner surface of the first segment.

8. The liquid-cooled plate assembly according to any one of claims 1-5, characterized in that, The first section of the current collector is sleeved on the second section of the heat exchange plate; The connection compensation structure located on the heat exchange plate is recessed on the outer surface of the second section.

9. The liquid-cooled plate assembly according to any one of claims 1-5, characterized in that, The first section of the current collector is sleeved on the second section of the heat exchange plate; The connection compensation structure located in the current collector protrudes from the inner surface of the first section, and the connection compensation structure located in the heat exchange plate is recessed into the outer surface of the second section.

10. A thermal management component, characterized in that, It includes a plurality of liquid cooling plate assemblies as described in any one of claims 1-9, wherein the plurality of liquid cooling plate assemblies are arranged side by side and the current collectors of two adjacent liquid cooling plate assemblies are in communication.

11. A battery, characterized in that, It includes a battery cell and a thermal management component as described in claim 10, wherein the heat exchange plate is disposed between two adjacent battery cells.

12. An electrical appliance, characterized in that, Includes the battery as described in claim 11, the battery being used to provide electrical energy.

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