Liquid cooling plate manufacturing device, liquid cooling plate, battery, and electrical device

Abstract

A liquid cooling plate manufacturing device, a liquid cooling plate (200), a battery (300), and an electrical device (400). The liquid cooling plate manufacturing device comprises a welding apparatus (10). The welding apparatus (10) comprises: a heat exchange structure (11), wherein the heat exchange structure (11) comprises a heat exchange plate (111) and a phase change working medium (112), an accommodating space (1111) is formed in the heat exchange plate (111), the phase change working medium (112) is accommodated in the accommodating space (1111), and the heat exchange plate (111) is provided with a contact side (1112) used for being attached to the liquid cooling plate (200), and an open side (1113) facing away from the contact side (1112); and a welding head (12), used for welding the side of the liquid cooling plate (200) facing away from the heat exchange structure (11). The liquid cooling plate manufacturing device can dissipate heat in a timely manner in the process of manufacturing and welding the liquid cooling plate (200), thereby avoiding thermal deformation of the liquid cooling plate (200) caused by excessive heat.

Description

Liquid cooling plate manufacturing equipment, liquid cooling plate, battery and electric device

[0001] The present application claims priority to the Chinese patent application No. 2024207123124, filed on April 8, 2024 in the China Patent Office and entitled "Liquid cooling plate manufacturing equipment, liquid cooling plate, battery and electric device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of battery manufacturing, in particular relates to a liquid cooling plate manufacturing equipment, a liquid cooling plate, a battery and an electric device. BACKGROUND

[0003] Due to the excellent energy storage performance of batteries, batteries have become an indispensable part of the development of new energy technologies. During the charging and discharging process of the battery, a large amount of heat will be generated. In order to quickly take away the heat generated by the battery, so that the battery can always be kept within the normal working temperature range, the technology of using a liquid cooling plate for heat dissipation and cooling in the battery is widely used. The liquid cooling plate takes away the heat generated by the battery through the cooling liquid flowing in the flow channel in the plate, so as to realize rapid heat dissipation and cooling of the battery.

[0004] In the related art, a liquid cooling plate is formed by welding two plates to form a cooling liquid flow channel between the two plates. During the welding operation of the two plates, welding heat acts on the plates. In the related art, the two plates are generally not taken any heat dissipation measures when welding, and are cooled by pure air cooling. However, since the welding heat is concentrated on the welding position of the plate for a short time, the air cooling method cannot dissipate heat in time, which can easily cause thermal deformation of the plate, and then the welded liquid cooling plate cannot meet the product requirements.

[0005] SUMMARY

[0006] The purpose of the embodiments of the present application is to provide a liquid cooling plate manufacturing equipment, a liquid cooling plate, a battery and an electric device, which can solve the problem of thermal deformation of the liquid cooling plate caused by high heat due to the inability to dissipate heat in time during the welding process of the liquid cooling plate.

[0007] The technical solution adopted by the embodiments of the present application is:

[0008] According to the first aspect of the present application, a liquid cooling plate manufacturing equipment is provided, comprising a welding device, the welding device comprising:

[0009] A heat exchange structure comprising a heat exchange plate and a phase change working medium, the heat exchange plate forming an accommodation space, and the phase change working medium being accommodated in the accommodation space, wherein the heat exchange plate has a contact side for abutting against the liquid cooling plate and an open side away from the contact side;

[0010] The welding head is used for welding the side of the liquid cooling plate away from the heat exchange structure.

[0011] In the process of producing the liquid cooling plate by using the liquid cooling plate manufacturing device, the welding operation is performed by the welding device, so that the liquid cooling plate is formed by welding. In the process of performing the welding operation, the welding head generates a large amount of heat in a short time, and the heat acts on the liquid cooling plate. Since the surface of the contact side of the heat exchange plate is attached to the side of the liquid cooling plate away from the welding head, the heat of the welding head acting on the liquid cooling plate can be quickly transferred to the heat exchange plate. And since the phase change working medium is contained in the containing space, the phase change working medium can immediately absorb the heat transferred to the heat exchange plate, and then the phase change working medium changes phase, and the heat is exchanged from the open side of the heat exchange plate to the air, so that the welding process of the liquid cooling plate is cooled in time and quickly, thereby reducing the probability of thermal deformation of the liquid cooling plate, improving the probability of the liquid cooling plate formed by welding to meet the product requirements, and improving the product yield of the liquid cooling plate.

[0012] In some embodiments of the present application, the phase change working medium is a liquid working medium that is vaporized by heat, so that the welding process of the liquid cooling plate is cooled in time and quickly.

[0013] In some embodiments of the present application, in the direction of gravity, the heat exchange structure is located above the welding head. At this time, not only can the welding process of the liquid cooling plate be cooled in time and quickly, but also the gaseous phase change working medium after vaporization is condensed into liquid phase change working medium on the open side, and then the condensed phase change working medium flows down again under the action of gravity and continues to absorb the heat generated by welding. Such a cycle.

[0014] In some embodiments of the present application, the phase change working medium is a solid working medium that is liquefied or vaporized by heat, and in the direction of gravity, the heat exchange structure is located above the welding head. At this time, not only can the welding process of the liquid cooling plate be cooled in time and quickly, but also the gaseous phase change working medium after vaporization is condensed into liquid phase change working medium on the open side, and then the condensed phase change working medium flows down again under the action of gravity and continues to absorb the heat generated by welding. Such a cycle.

[0015] In some embodiments of the present application, the phase change working medium is a solid working medium that is liquefied or vaporized by heat, and in the direction of gravity, the heat exchange structure is located below the welding head.

[0016] In some embodiments of the present application, the solid phase change working medium is attached to the inner wall arranged on the contact side.

[0017] In some embodiments of the present application, the welding head comprises a welding head and at least two pressing rollers, the pressing rollers are respectively located on both sides of the welding head, and the pressing rollers are used to press against the liquid cooling plate at the same time, and the welding head is used to weld the liquid cooling plate to form a cooling liquid flow channel between adjacent welds. In this way, not only can the liquid cooling plate be pressed and positioned to prevent the liquid cooling plate from shifting, but also the liquid cooling plate can be pressed against when it is subjected to the heat concentration effect of the welding head to prevent the liquid cooling plate from being deformed due to heat.

[0018] In some embodiments of the present application, the number of pressing rollers is two, and the two pressing rollers are respectively located on both sides of the welding head.

[0019] In some embodiments of the present application, the welding head is a laser welding head.

[0020] In some embodiments of the present application, the liquid cooling plate manufacturing device further comprises a gas expansion device, the gas expansion device is used to communicate with the cooling liquid flow channel after welding is completed, and the gas expansion device is used to inflate the cooling liquid flow channel to expand the cooling liquid flow channel. By expanding the cooling liquid flow channel using the gas expansion device, the flow capacity of the cooling liquid flow channel is improved.

[0021] In some embodiments of the present application, the liquid cooling plate manufacturing device further comprises a flow channel forming template, the flow channel forming template is provided with an expansion groove consistent with the extension direction of the cooling liquid flow channel, the flow channel forming template covers one side of the liquid cooling plate when the gas expansion device inflates the cooling liquid flow channel, and the expansion groove is arranged opposite to the cooling liquid flow channel. In this way, the cooling liquid flow channel of the liquid cooling plate is inflated and limited by the expansion groove of the flow channel forming template, so that the cooling liquid flow channel is uniformly inflated and expanded, thereby preventing the liquid cooling plate from being cracked by inflation and improving the product yield of the liquid cooling plate.

[0022] According to a second aspect of the present application, a liquid cooling plate is provided. The liquid cooling plate comprises a first cooling plate and a second cooling plate, the first cooling plate and the second cooling plate are arranged in layers; wherein the first cooling plate and the second cooling plate are welded and formed by the aforementioned liquid cooling plate manufacturing device; or the first cooling plate and the second cooling plate are welded and formed by the aforementioned liquid cooling plate manufacturing device, and the cooling liquid flow channel is expanded and formed by the gas expansion device.

[0023] According to a third aspect of the present application, a battery is provided. The battery comprises the aforementioned liquid cooling plate.

[0024] According to a fourth aspect of the present application, an electric device is provided. The electric device comprises the aforementioned battery. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0026] Fig. 1 is a schematic view of a structure in which a welding device of a liquid cooling plate manufacturing apparatus of an embodiment of the present application welds a liquid cooling plate;

[0027] Fig. 2 is an enlarged view of A in Fig. 1;

[0028] Fig. 3 is a schematic view of a cross section of a heat exchange structure in which a phase change working medium is a solid working medium in the liquid cooling plate manufacturing apparatus of the embodiment of the present application;

[0029] Fig. 4 is a schematic view of a cross section of a heat exchange structure in which a phase change working medium is a liquid working medium in the liquid cooling plate manufacturing apparatus of the embodiment of the present application;

[0030] Fig. 5 is a schematic view of a structure in which a gas expansion device of the liquid cooling plate manufacturing apparatus of the embodiment of the present application inflates and expands a liquid cooling plate;

[0031] Fig. 6 is an enlarged view of B in Fig. 5;

[0032] Fig. 7 is an exploded schematic view of a battery of the embodiment of the present application;

[0033] Fig. 8 is a schematic view of a structure of an electrical equipment of the embodiment of the present application.

[0034] In the drawings, various reference numerals refer to:

[0035] 10, welding device; 11, heat exchange structure; 111, heat exchange plate; 1111, accommodation space; 1112, contact side; 1113, open side; 112, phase change working medium; 12, welding head; 121, welding head; 122, pressing roller;

[0036] 20, gas expansion device;

[0037] 200, liquid cooling plate;

[0038] 210, first cooling plate; 220, second cooling plate; 230, cooling liquid flow channel; 241, first flow channel opening; 242, second flow channel opening;

[0039] 300, battery;

[0040] 310, box shell; 311, box main body; 312, box cover; 313, assembly space; 320, battery cell;

[0041] 400, electrical equipment;

[0042] 410, drive motor; 420, vehicle frame; 430, vehicle wheel. DETAILED DESCRIPTION

[0043] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set to" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implying the number of technical features.

[0045] At present, in order to meet the requirement of high endurance capability, electric vehicles generally use multiple battery monomers to form a battery, and store large amount of electricity through the battery to ensure high endurance capability.

[0046] In the process of charging and discharging of the battery, a large amount of heat will be generated. In order to quickly take away the heat generated by the battery so that the battery can always be kept within the normal working temperature range, the technology of using liquid cooling plate for heat dissipation and cooling in the battery is widely used. The liquid cooling plate takes away the heat generated by the battery through the continuously flowing cooling liquid in the flow channel in the plate, so that the battery realizes rapid heat dissipation and cooling.

[0047] In the related art, a liquid cooling plate is formed by welding two plates to form a cooling liquid flow channel between the two plates. In the process of welding the two plates, welding heat acts on the plates. The two plates are generally not taken any heat dissipation measures when welding, and are cooled by pure air cooling. However, since the welding heat is concentrated on the welding position of the plate for a short time, the air cooling cannot dissipate heat in time, thus easily leading to thermal deformation of the plate, and then leading to that the welded liquid cooling plate cannot meet the product requirements.

[0048] Based on the above considerations, the embodiments of the present application provide a liquid cooling plate manufacturing device, which is used to weld a first cooling plate and a second cooling plate to form a liquid cooling plate. During the welding process of the liquid cooling plate, when the first cooling plate and the second cooling plate are welded by the welding head, the heat exchange structure cools the liquid cooling plate by heat dissipation, thereby preventing the liquid cooling plate from deforming due to the concentrated heat during the welding process, improving the probability of the welded liquid cooling plate meeting the product requirements, and improving the product yield of the liquid cooling plate. Moreover, the manufactured liquid cooling plate is used to assemble a battery to cool the battery during charging and discharging, so as to ensure that the battery works at a normal working temperature range. Further, the assembled battery is applied to an electrical equipment to provide power for the electrical load on the electrical equipment.

[0049] In order to illustrate the technical solutions provided by the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0050] As shown in FIGS. 1-4, the embodiments of the present application provide a liquid cooling plate manufacturing device for preparing a liquid cooling plate 200. The liquid cooling plate manufacturing device includes a welding device 10 for welding operation in the production process of preparing the liquid cooling plate 200. The welding device 10 includes a heat exchange structure 11 and a welding head 12. The heat exchange structure 11 includes a heat exchange plate 111 and a phase change working medium 112, the heat exchange plate 111 forms an accommodation space 1111, and the phase change working medium 112 is accommodated in the accommodation space 1111. The heat exchange plate 111 has a contact side 1112 for abutting against the liquid cooling plate 200 and an open side 1113 opposite to the contact side 1112, and the welding head 12 is used to abut against one side of the liquid cooling plate 200 away from the heat exchange structure 11 and weld the liquid cooling plate 200. The open side 1113 of the heat exchange plate 111 refers to a larger area side of the heat exchange plate 111 that does not contact the liquid cooling plate 200. Generally, the open side 1113 is directly exposed to the air, and the open side 1113 exchanges heat with the air.

[0051] In the process of manufacturing the liquid cooling plate 200 by using the liquid cooling plate manufacturing device, the welding operation is performed by the welding device 10, so that the liquid cooling plate 200 is formed by welding. In the process of performing the welding operation, the welding head 12 generates a large amount of heat in a short time, and the heat acts on the liquid cooling plate 200. Since the surface of the contact side 1112 of the heat exchange plate 111 is attached to the side of the liquid cooling plate 200 away from the welding head 12, the heat acting on the liquid cooling plate 200 can be quickly transferred to the heat exchange plate 111. Since the phase change working medium 112 is contained in the containing space 1111, the phase change working medium 112 can immediately absorb the heat transferred to the heat exchange plate 111, and then the phase change working medium 112 changes phase, and the heat is exchanged from the open side 1113 of the heat exchange plate 111 to the air, so that the welding process of the liquid cooling plate 200 is timely and quickly cooled, thereby reducing the probability of thermal deformation of the liquid cooling plate 200, improving the probability that the liquid cooling plate 200 formed by welding meets the product requirements, and making the liquid cooling plate 200 after welding meet the flatness requirement (i.e. the liquid cooling plate 200 is flat and does not warp), thereby improving the product yield of the liquid cooling plate 200.

[0052] The phase change working medium 112 refers to a substance that can change from one form to another form after absorbing heat. For example, the phase change working medium 112 is in a liquid state at room temperature, and during the process of absorbing heat, the phase change working medium 112 can change from a liquid state to a gaseous state, i.e. the phase change working medium 112 is gasified from a liquid state to a gaseous state after being heated. For another example, the phase change working medium 112 is in a solid state at room temperature, and during the process of absorbing heat, the phase change working medium 112 can change from a solid state to a liquid state, i.e. the phase change working medium 112 is liquefied from a solid state to a liquid state after being heated. For another example, the phase change working medium 112 is in a solid state at room temperature, and during the process of absorbing heat, the phase change working medium 112 can change from a solid state to a gaseous state, i.e. the phase change working medium 112 is gasified from a solid state to a gaseous state after being heated.

[0053] In some embodiments of the present application, as shown in FIG. 4, the phase change working medium 112 is a liquid working medium that is gasified by heat. During the welding process of the liquid cooling plate 200, the liquid phase change working medium 112 quickly absorbs the heat generated by welding, and then is gasified into a gaseous state. The gaseous phase change working medium 112 carries heat to contact the open side 1113 of the heat exchange plate 111, so that the heat can be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby realizing timely and rapid cooling of the welding process of the liquid cooling plate 200, thereby reducing the probability of thermal deformation of the liquid cooling plate 200, improving the probability that the liquid cooling plate 200 formed by welding meets the product requirements, and improving the product yield of the liquid cooling plate 200.

[0054] Specifically, when the phase change working medium 112 is a liquid phase working medium that is gasified by heat, the liquid phase phase change working medium 112 does not fill the containing space 1111 of the heat exchange plate 111, and the part of the containing space 1111 that is not filled by the liquid phase phase change working medium 112 is used to contain the gaseous phase change working medium 112 when the phase change working medium 112 is gasified. In this way, the gaseous phase change working medium 112 after gasification can carry heat and spread.

[0055] In some embodiments of the present application, when the phase change working medium 112 is a liquid phase working medium that is gasified by heat, in the direction of gravity, the heat exchange structure 11 is located above the welding head 12, so that, in the process of welding the liquid cooling plate 200, the liquid phase phase change working medium 112 stays at the contact side 1112 under the action of gravity. This makes the phase change working medium 112 more quickly absorb the heat generated by welding. As shown in FIG. 4, the hollow arrows in FIG. 4 show the upward direction of the gasification of the phase change working medium, that is, the liquid phase phase change working medium 112 quickly absorbs the heat generated by welding and is gasified into gaseous phase change working medium 112, which rises and contacts the open side 1113, so that heat can be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby achieving timely and rapid heat dissipation for the welding process of the liquid cooling plate 200. When the gaseous phase change working medium 112 after gasification touches the contact side 1112, the gaseous phase change working medium 112 transfers heat to the open side 1113, so the gaseous phase change working medium 112 releases heat, and the gaseous phase change working medium 112 is condensed into liquid phase phase change working medium 112 by the open side 1113. Then, the condensed phase change working medium 112 flows down again under the action of gravity and continues to absorb the heat generated by welding. This cycle achieves timely and rapid heat dissipation for the welding process of the liquid cooling plate 200, thereby reducing the probability of thermal deformation of the liquid cooling plate 200, improving the probability that the welded liquid cooling plate 200 meets product requirements, and improving the product yield of the liquid cooling plate 200.

[0056] In some embodiments of the present application, when the phase change working medium 112 is a liquid phase working medium that is gasified by heat, in the direction of gravity, the heat exchange structure 11 is located above the welding head 12, so that, in the process of welding the liquid cooling plate 200, the liquid phase phase change working medium 112 stays at the contact side 1112 under the action of gravity. This makes the phase change working medium 112 more quickly absorb the heat generated by welding. As shown in FIG. 4, the hollow arrows in FIG. 4 show the upward direction of the gasification of the phase change working medium, that is, the liquid phase phase change working medium 112 quickly absorbs the heat generated by welding and is gasified into gaseous phase change working medium 112, which rises and contacts the open side 1113, so that heat can be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby achieving timely and rapid heat dissipation for the welding process of the liquid cooling plate 200. When the gaseous phase change working medium 112 after gasification touches the contact side 1112, the gaseous phase change working medium 112 transfers heat to the open side 1113, so the gaseous phase change working medium 112 releases heat, and the gaseous phase change working medium 112 is condensed into liquid phase phase change working medium 112 by the open side 1113. Then, the condensed phase change working medium 112 flows down again under the action of gravity and continues to absorb the heat generated by welding. This cycle achieves timely and rapid heat dissipation for the welding process of the liquid cooling plate 200, thereby reducing the probability of thermal deformation of the liquid cooling plate 200, improving the probability that the welded liquid cooling plate 200 meets product requirements, and improving the product yield of the liquid cooling plate 200.

[0057] In some embodiments of the present application, as shown in FIG. 3, the phase change working medium 112 is a solid-state working medium that is liquefied or gasified by heat. And, in the direction of gravity, the heat exchange structure 11 is located above the welding head 12. Generally, when the solid-state phase change working medium 112 is initially filled into the containing space 1111, the solid-state phase change working medium 112 is in contact with the inner wall of the contact side 1112. In this way, during the welding process of the liquid cooling plate 200, the solid-state phase change working medium 112 rapidly absorbs the heat generated by welding and gasifies into gaseous phase change working medium 112, which rises, as shown by the hollow arrow in FIG. 3, and contacts the open side 1113, so that heat can be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby achieving timely and rapid heat dissipation during the welding process of the liquid cooling plate 200. When the gaseous phase change working medium 112 after gasification touches the contact side 1112, the gaseous phase change working medium 112 transfers heat to the open side 1113, so the gaseous phase change working medium 112 releases heat, and the gaseous phase change working medium 112 is condensed into liquid phase change working medium 112 by the open side 1113. Then, the condensed phase change working medium 112 flows down again under the action of gravity and continues to absorb the heat generated by welding, and then the flowing liquid phase change working medium 112 is gasified to rise to the open side 1113. Such a cycle is repeated, thereby achieving timely and rapid heat dissipation during the welding process of the liquid cooling plate 200, reducing the probability of thermal deformation of the liquid cooling plate 200, improving the probability that the welded liquid cooling plate 200 meets product requirements, and improving the product yield of the liquid cooling plate 200.

[0058] In some embodiments of the present application, as shown in FIG. 3, the phase change working medium 112 is a solid-state working medium that is liquefied or gasified by heat. Generally, when the solid-state phase change working medium 112 is initially filled into the containing space 1111, the solid-state phase change working medium 112 is in contact with the inner wall of the contact side 1112. In this embodiment, the heat exchange structure 11 is located below the welding head 12 in the direction of gravity. During the welding process of the liquid cooling plate 200, the solid-state phase change working medium 112 quickly absorbs the heat generated by welding and is gasified into gaseous phase change working medium 112, which diffuses and touches the open side 1113, so that heat can be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby achieving timely and rapid heat dissipation during the welding process of the liquid cooling plate 200. When the gaseous phase change working medium 112 after gasification touches the contact side 1112, the gaseous phase change working medium 112 transfers heat to the open side 1113, so that the gaseous phase change working medium 112 releases heat, and the gaseous phase change working medium 112 is condensed into liquid phase change working medium 112 by the open side 1113. At this time, the liquid phase change working medium 112 stays on the open side 1113 under the action of gravity. Then, the heat generated by welding is transferred to the heat exchange plate 111, and the liquid phase change working medium 112 continues to absorb heat from the heat exchange plate 111, thereby cooling the liquid cooling plate 200 during the welding process. Compared with the related art, which does not take any measures to cool the welding process, the present embodiment can reduce the probability of thermal deformation of the liquid cooling plate 200 during the welding process to some extent, thereby improving the product yield of the liquid cooling plate 200.

[0059] In some embodiments of the present application, as shown in FIG. 2, the welding head 12 includes a welding head 121 and at least two pressing rollers 122. The welding head 121 is used to weld the liquid cooling plate 200 to form a cooling liquid flow channel 230 between adjacent welds. The pressing rollers 122 are respectively located on both sides of the welding head 121, and during the welding operation of the welding head 121 on the liquid cooling plate 200, the pressing rollers 122 located on both sides of the welding head 121 are used to simultaneously abut against the liquid cooling plate 200. In this way, the pressing rollers 122 located on both sides of the welding head 121 abut and press the liquid cooling plate 200, which not only can position the liquid cooling plate 200 and prevent the liquid cooling plate 200 from shifting, thereby ensuring that the welding position of the welding head 121 on the liquid cooling plate 200 is always correct, but also can abut against the liquid cooling plate 200 when the liquid cooling plate 200 is subjected to the heat concentration effect of the welding head 121, thereby preventing the liquid cooling plate 200 from being deformed due to heat.

[0060] In some embodiments of the present application, as shown in FIG. 2, the number of the pinch rollers 122 is two, and the two pinch rollers 122 are respectively located on the two sides of the welding head 121, that is, the welding head 121 and the two pinch rollers 122 are arranged in a left-middle-right manner, and the welding head 121 is located in the middle position of the two pinch rollers 122. During the welding operation of the welding head 121 on the liquid cooling plate 200, the two pinch rollers 122 located on the two sides of the welding head 121 are used to simultaneously abut against the liquid cooling plate 200, so that not only the liquid cooling plate 200 can be positioned and pressed tightly to prevent the liquid cooling plate 200 from shifting, thereby ensuring that the welding position of the welding head 121 on the liquid cooling plate 200 is always correct, but also the liquid cooling plate 200 can be abutted against when the liquid cooling plate 200 is subjected to the heat concentration effect of the welding head 121, thereby preventing the liquid cooling plate 200 from being deformed due to heat.

[0061] In some embodiments of the present application, the welding head 121 includes but is not limited to a laser welding head, that is, the liquid cooling plate 200 is formed by laser welding. Wherein, the "laser welding" is a kind of high-efficiency and precise welding method using high-energy density laser beam as heat source, which is one of important aspects of laser material processing technology application, and the welding process belongs to heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction, and by controlling the parameters such as the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied in precise welding of micro and small parts.

[0062] According to the second aspect of the present application, a liquid cooling plate 200 is provided. As shown in FIGS. 1, 2, 5 and 6, the liquid cooling plate 200 includes a first cooling plate 210 and a second cooling plate 220, and the first cooling plate 210 and the second cooling plate 220 are stacked. Then, the welding device 10 of the liquid cooling plate manufacturing equipment is used to weld the first cooling plate 210 and the second cooling plate 220, so that the first cooling plate 210 and the second cooling plate 220 are formed into the liquid cooling plate 200, and a cooling liquid flow channel 230 for flowing and filling the cooling liquid is formed.

[0063] Since the channel section of the cooling liquid flow channel 230 of the liquid cooling plate 200 which is laminated and welded is small, that is, the flow capacity of the cooling liquid flow channel 230 is small, in some embodiments of the present application, as shown in FIGS. 5 and 6, the liquid cooling plate manufacturing equipment further comprises a gas expansion device 20, which is used to expand the cooling liquid flow channel 230 to improve the flow capacity of the cooling liquid flow channel 230. Wherein, the gas expansion device 20 is used to communicate with the cooling liquid flow channel 230 after welding is completed, and the gas expansion device 20 is used to inflate the cooling liquid flow channel 230 to expand the cooling liquid flow channel 230, so that the cooling liquid flow channel 230 is expanded by the gas expansion method, and the flow capacity of the cooling liquid flow channel 230 is improved. That is, the flow of the cooling liquid allowed to flow through the cooling liquid flow channel 230 per unit time is larger, so that the cooling liquid flowing in the cooling liquid flow channel 230 can take away more heat generated by the battery 300 during charging and discharging, so that the battery 300 can always be kept in the normal working temperature range to charge and discharge.

[0064] And in the process of expanding the cooling liquid flow channel 230 by the gas expansion device 20, the force of the gas acting on the inner wall of the cooling liquid flow channel 230 is relatively slow, soft and uniform. Therefore, inflating and expanding the cooling liquid flow channel 230 by the gas expansion device 20 can greatly reduce the risk of instantaneous cracking of the weld between the first cold plate 210 and the second cold plate 220. In this way, the liquid cooling plate 200 can be well protected, and the product yield of the liquid cooling plate 200 can be improved.

[0065] In some embodiments of the present application, the liquid cooling plate manufacturing device further comprises a flow channel forming die (not shown) provided with an expansion groove consistent with the running direction of the cooling liquid flow channel 230 (i.e., the extension direction of the expansion groove is consistent with the extension direction of the cooling liquid flow channel 230). Moreover, the flow channel forming die covers one side of the liquid cooling plate 200 when the inflation device 20 inflates the cooling liquid flow channel 230, and the expansion groove is arranged opposite to the cooling liquid flow channel 230. When the inflation operation is performed on the cooling liquid flow channel 230 of the liquid cooling plate 200, the inflated part of the liquid cooling plate 200 is accommodated in the expansion groove, and when the inflated part hits the groove wall of the expansion groove, the inflation of the cooling liquid flow channel 230 stops. In this way, the cooling liquid flow channel 230 is uniformly inflated, that is, the channel aperture of each position of the inflated cooling liquid flow channel 230 is consistent. Moreover, the inflation of the cooling liquid flow channel 230 of the liquid cooling plate 200 is limited by the expansion groove of the flow channel forming die, so that the liquid cooling plate 200 is not easily cracked by inflation, and the product yield of the liquid cooling plate 200 is improved. In this embodiment, only one flow channel forming die needs to be prepared, and two flow channel forming dies are not needed to clamp and assemble the liquid cooling plate 200, thereby saving the mold opening cost. That is, when the flow channel forming die is used to assemble the welded liquid cooling plate 200, one side surface of the liquid cooling plate 200 is placed on the workbench surface of the inflation device 20, then the flow channel forming die is stacked on the liquid cooling plate 200, and then the flow channel forming die is connected and fixed with the workbench surface of the inflation device 20, so that the flow channel forming die tightly fixes the liquid cooling plate 200 on the workbench surface of the inflation device 20, and then the cooling liquid flow channel 230 is inflated.

[0066] In the liquid cooling plate 200 provided by the present application, as shown in FIGS. 1, 2, 5 and 6, the first cooling plate 210 and the second cooling plate 220 of the liquid cooling plate 200 are welded and formed by the liquid cooling plate manufacturing device described above. Moreover, the cooling liquid flow channel 230 is expanded and formed by the inflation device of the liquid cooling plate manufacturing device.

[0067] The liquid cooling plate manufacturing device of the present application is designed as follows when the liquid cooling plate 200 is manufactured by the liquid cooling plate manufacturing device:

[0068] The containing space 1111 of the heat exchange plate 111 is filled with the phase change working medium 112 in liquid state (the phase change working medium 112 is in liquid state at room temperature) which is heated and vaporized, but the phase change working medium 112 in liquid state does not fill the containing space 1111. When the liquid cooling plate 200 is welded, the components of the welding device 10 and the liquid cooling plate 200 are arranged from top to bottom in the order of the heat exchange structure 11, the liquid cooling plate 200 and the welding head 12, so that the phase change working medium 112 in liquid state stays at the contact side 1112 under the action of gravity, so that the phase change working medium 112 can more quickly absorb the heat generated by welding. During the welding process of the liquid cooling plate 200, the phase change working medium 112 in liquid state quickly absorbs the heat generated by welding and vaporizes into the phase change working medium 112 in gaseous state which rises and contacts the open side 1113, so that the heat can be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby realizing timely and rapid heat dissipation of the welding process of the liquid cooling plate 200. When the phase change working medium 112 in gaseous state after vaporization touches the contact side 1112, the phase change working medium 112 in gaseous state transfers heat to the open side 1113, so that the phase change working medium 112 in gaseous state is condensed into the phase change working medium 112 in liquid state by the open side 1113. Then, the condensed phase change working medium 112 flows down again under the action of gravity and continues to absorb the heat generated by welding. Such a cycle is repeated. The embodiment of the present application welds the first cooling plate 210 and the second cooling plate 220 by a laser welding head, and during the welding process, the laser welding head is provided with a pressing roller 122 on each side, which not only can press and position the liquid cooling plate 200 to prevent the liquid cooling plate 200 from shifting, thereby ensuring that the welding position of the welding head 121 on the liquid cooling plate 200 is always correct, but also can resist the liquid cooling plate 200 when the liquid cooling plate 200 is subjected to the heat concentration effect of the welding head 121, thereby preventing the liquid cooling plate 200 from being deformed by heat. Further, after the liquid cooling plate 200 is welded, the gas inflation device 20 is used to inflate and expand the cooling liquid flow channel 230 obtained by welding, thereby improving the flow capacity of the cooling liquid flow channel 230.

[0069] According to a third aspect of the present application, a battery 300 is provided, as shown in FIG. 7, which comprises the liquid cooling plate 200 and a plurality of battery cells 320 as described above. As shown in FIG. 7, the battery 300 comprises a box shell 310 and the battery cells 320, the box shell 310 is formed with an assembly space 313, wherein the box shell 310 comprises a box body 311 and a box cover 312, the box cover 312 covers the opening of the box body 311 to form a sealed assembly space 313. The liquid cooling plate 200 is installed at the bottom of the assembly space 313, and the battery cells 320 are installed in the assembly space 313 and arranged in contact with the liquid cooling plate 200. The corresponding cooling liquid inlet pipe communicates with the first flow port 241 of the liquid cooling plate 200 after passing through the box shell 310, so as to transport the cooling liquid into the cooling liquid flow channel 230 of the liquid cooling plate 200. The cooling liquid flows to fill the cooling liquid flow channel 230, and then the cooling liquid is output from the second flow port 242. The cooling liquid circulates in this way to achieve heat dissipation and cooling of the battery 300 during charging and discharging. In this battery 300, the liquid cooling plate 200 is arranged in direct contact with the battery cells 320, so that the heat generated by the battery cells 320 during charging and discharging can be directly and rapidly transferred to the liquid cooling plate 200, and then the cooling liquid of the liquid cooling plate 200 carries away the heat during continuous flow, thereby achieving heat dissipation and cooling of the battery 300 during charging and discharging. The liquid cooling effect is obvious, and the working temperature of the battery 300 during charging and discharging is prevented from being too high to affect normal work.

[0070] According to a fourth aspect of the present application, a power consuming device 400 is provided, as shown in FIG. 8. The power consuming device 400 comprises the battery 300 as described above, and the battery 300 is used for charging and energy storage, and the battery 300 is used for discharging to provide power for the power consuming load of the power consuming device 400.

[0071] The power consuming device 400 includes but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include but is not limited to a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include but is not limited to an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0072] In the embodiments of the present application, the power consuming device 400 is an electric vehicle, as shown in FIG. 8, the battery 300 is installed on the frame 420 of the electric vehicle. The battery 300 provided by the embodiments of the present application is used to supply power to the driving motor 410 (i.e. the power consuming load of the power consuming device 400) of the electric vehicle, so that the driving motor 410 drives the wheels 430 to rotate, so that the electric vehicle can normally travel.

[0073] The above merely provides optional embodiments of the present application, but not for limiting the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc., made within the principles and technical scope of the present application, should be included in the scope of the claims of the present application.

Claims

1. A liquid cooling plate manufacturing device, characterized in that: A welding device is provided, comprising: A heat exchange structure comprising a heat exchange plate and a phase change medium, wherein the heat exchange plate forms a receiving space, and the phase change medium is received in the receiving space, wherein the heat exchange plate has a contact side for being disposed in contact with the liquid cooling plate and an open side facing away from the contact side; The welding head is used to weld the side of the liquid cooling plate away from the heat exchange structure.

2. The liquid cooling plate manufacturing equipment according to claim 1, characterized in that: The phase-change working medium is a liquid working medium that is vaporized by heat.

3. The liquid cooling plate manufacturing equipment according to claim 2, characterized in that: In the direction of gravity, the heat exchange structure is located above the welding head.

4. The liquid cooling plate manufacturing equipment according to claim 1, characterized in that: The phase-change working medium is a solid working medium that is liquefied or gasified when heated, and the heat exchange structure is located above the welding head in the direction of gravity.

5. The liquid cooling plate manufacturing equipment according to claim 1, characterized in that: The phase-change working medium is a solid working medium that is liquefied or gasified when heated, and the heat exchange structure is located below the welding head in the direction of gravity.

6. The liquid cooling plate manufacturing equipment according to claim 4 or 5, characterized in that: The solid phase-change working medium is arranged against the inner wall of the contact side.

7. The liquid cooling plate manufacturing equipment according to any one of claims 1 to 6, characterized in that: The welding head includes a welding head and at least two pressing rollers, the pressing rollers are respectively located on both sides of the welding head, and the pressing rollers are used to simultaneously press against the liquid cooling plate. The welding head is used to weld the liquid cooling plate so that a cooling liquid flow channel is formed between adjacent welds.

8. The liquid cooling plate manufacturing equipment according to claim 7, characterized in that: There are two pressing rollers, and the two pressing rollers are respectively located on both sides of the welding head.

9. The liquid cooling plate manufacturing equipment according to claim 7, characterized in that: The welding head is a laser welding head.

10. The liquid cooling plate manufacturing equipment according to any one of claims 7 to 9, characterized in that: The liquid cooling plate manufacturing equipment further includes an air expansion device, which is used to communicate with the coolant flow channel after welding is completed, and is used to blow air into the coolant flow channel to expand the coolant flow channel.

11. The liquid cooling plate manufacturing equipment according to claim 10, characterized in that: The liquid cooling plate manufacturing equipment also includes a flow channel forming template, which is provided with an expansion groove consistent with the extension direction of the coolant flow channel. The flow channel forming template covers one side of the liquid cooling plate when the air expansion device blows air into the coolant flow channel, and the expansion groove is arranged directly opposite to the coolant flow channel.

12. A liquid cooling plate, characterized in that: The first cold plate and the second cold plate are stacked. Wherein, the first cold plate and the second cold plate are welded and formed by the liquid cooling plate manufacturing equipment according to any one of claims 1 to 11; or The first cold plate and the second cold plate are formed by welding using the liquid cooling plate manufacturing equipment according to claim 10 or 11, and the cooling liquid flow channel is expanded by the gas expansion device.

13. A battery, characterized in that: Comprising the liquid cooling plate of claim 12.

14. An electrical device, characterized in that: Comprising the battery of claim 13.

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