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

Abstract

The utility model belongs to the technical field of battery manufacturing, and particularly relates to liquid cooling plate manufacturing equipment, a liquid cooling plate, a battery and electric equipment. The liquid cooling plate manufacturing equipment comprises a welding device, the welding device comprises a heat exchange structure, the heat exchange structure comprises a heat exchange plate and a phase change working medium, the heat exchange plate forms a containing space, the phase change working medium is contained in the containing space, and the heat exchange plate is provided with a contact side used for being attached to a liquid cooling plate and an open side deviating from the contact side; and the welding head is used for welding the side, deviating from the heat exchange structure, of the liquid cooling plate. According to the technical scheme, the problem that in the liquid cooling plate welding process, heat cannot be dissipated in time, so that heat is too high, and heat deformation of the liquid cooling plate is caused is solved.

Description

Technical Field

[0001] This application belongs to the technical field of battery manufacturing, and particularly relates to a liquid cooling plate manufacturing device, a liquid cooling plate, a battery, and an electrical equipment. Background Art

[0002] 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 is generated by the battery. In order to quickly remove the heat generated by the battery so that the battery can always be maintained within the normal operating temperature range, therefore, the technology of using a liquid cooling plate for heat dissipation and cooling inside the battery is widely adopted. The liquid cooling plate takes away the heat generated by the battery through the coolant continuously flowing in the flow channels inside the plate, thereby enabling the battery to achieve rapid heat dissipation and cooling.

[0003] In the related art, a liquid cooling plate is formed by welding two plates together to form a coolant flow channel between the two plates. During the welding operation of the two plates, the welding heat acts on the plates. In the related art, generally no heat dissipation measures are taken when the two plates are welded, and heat dissipation is carried out through a simple air-cooling method. However, since the welding heat acts intensively on the welding position of the plates in a short period of time, the air-cooling method cannot dissipate heat in time, which easily causes the plates to undergo thermal deformation, and then the welded liquid cooling plate cannot meet the product requirements. Utility Model Content

[0004] The purpose of this application is to provide a liquid cooling plate manufacturing device, a liquid cooling plate, a battery, and an electrical equipment, aiming to solve the problem that the heat is too high due to the inability to dissipate heat in time during the process of welding the liquid cooling plate, resulting in thermal deformation of the liquid cooling plate.

[0005] To achieve the above object, according to the first aspect of this application, the technical solution adopted is: A liquid cooling plate manufacturing device includes a welding device, and the welding device includes:

[0006] A heat exchange structure, including a heat exchange plate and a phase change working fluid. The heat exchange plate forms an accommodation space, and the phase change working fluid is accommodated in the accommodation space. Among them, the heat exchange plate has a contact side for being arranged in contact with the liquid cooling plate and an open side facing away from the contact side;

[0007] A welding head for welding the side of the liquid cooling plate facing away from the heat exchange structure.

[0008] During the process of manufacturing a liquid cooling plate using this liquid cooling plate manufacturing equipment, a welding operation is performed by a welding device, and thus the liquid cooling plate is formed by welding. During the welding operation, a large amount of heat is generated by the welding head in a short period of 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 facing away from the welding head, therefore, the heat applied by the welding head to the liquid cooling plate can be quickly transferred to the heat exchange plate. And, since the phase change working fluid is contained in the accommodation space, therefore, the phase change working fluid can immediately absorb the heat transferred to the heat exchange plate, and then the phase change working fluid undergoes a phase change, and the heat is exchanged from the open side of the heat exchange plate to the air, thereby realizing timely and rapid heat dissipation during the welding process of the liquid cooling plate, reducing the probability of thermal deformation of the liquid cooling plate, increasing the probability that the welded liquid cooling plate meets the product requirements, and improving the product yield of the liquid cooling plate.

[0009] In some embodiments of the present application, the phase change working fluid is a liquid working fluid that is vaporized by heat, thereby realizing timely and rapid heat dissipation during the welding process of the liquid cooling plate.

[0010] 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 timely and rapid heat dissipation during the welding process of the liquid cooling plate be realized, but also the vaporized gaseous phase change working fluid is condensed into a liquid phase change working fluid by the open side, and then the condensed phase change working fluid flows down again under the action of gravity and continues to absorb the heat generated by welding. And so on in a cycle.

[0011] In some embodiments of the present application, the phase change working fluid is a solid working fluid 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 timely and rapid heat dissipation during the welding process of the liquid cooling plate be realized, but also the vaporized gaseous phase change working fluid is condensed into a liquid phase change working fluid by the open side, and then the condensed phase change working fluid flows down again under the action of gravity and continues to absorb the heat generated by welding. And so on in a cycle.

[0012] In some embodiments of the present application, the phase change working fluid is a solid working fluid that is liquefied or vaporized by heat, and in the direction of gravity, the heat exchange structure is located below the welding head.

[0013] In some embodiments of the present application, the solid phase change working fluid is disposed in close contact with the inner wall of the contact side.

[0014] In some embodiments of the present application, the welding head includes a welding tip and at least two pressing rollers. The pressing rollers are respectively located on both sides of the welding tip, and the pressing rollers are used to simultaneously abut against the liquid cooling plate. The welding tip is used to weld the liquid cooling plate to form a coolant 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 it can abut against the liquid cooling plate when the liquid cooling plate is subjected to the concentrated heat generated by the welding tip, preventing the liquid cooling plate from warping and deforming due to heat.

[0015] 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 tip.

[0016] In some embodiments of the present application, the welding tip is a laser welding tip.

[0017] In some embodiments of the present application, the liquid cooling plate manufacturing device further includes an air inflation device. The air inflation device is used to communicate with the coolant flow channel after welding is completed, and the air inflation device is used to inflate the coolant flow channel to expand the coolant flow channel, and the air inflation device is used to expand the coolant flow channel, thereby improving the flow capacity of the coolant flow channel.

[0018] In some embodiments of the present application, the liquid cooling plate manufacturing device further includes a flow channel forming template. The flow channel forming template is provided with an expansion groove that is consistent with the extending direction of the coolant flow channel. The flow channel forming template covers one side of the liquid cooling plate when the air inflation device inflates the coolant flow channel, and the expansion groove is arranged opposite to the coolant flow channel. In this way, the air inflation of the coolant flow channel of the liquid cooling plate is restricted by the expansion groove of the flow channel forming template, so that the coolant flow channel is uniformly inflated and expanded, so that the liquid cooling plate is not easily torn by air inflation, and the product yield of the liquid cooling plate is improved.

[0019] According to the second aspect of the present application, a liquid cooling plate is provided. Wherein, the liquid cooling plate includes a first cooling plate and a second cooling plate, and the first cooling plate and the second cooling plate are stacked; 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 coolant flow channel is expanded and formed by the air inflation device.

[0020] According to the third aspect of the present application, a battery is provided. Wherein, the battery includes the aforementioned liquid cooling plate.

[0021] According to the second aspect of the present application, an electrical device is provided. Wherein, the electrical device includes the aforementioned battery. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the welding device of the liquid cooling plate manufacturing equipment of the embodiment of the present application for welding the liquid cooling plate;

[0024] Figure 2 For Figure 1 It is an enlarged schematic diagram at position A in

[0025] Figure 3 It is a schematic cross-sectional view of the heat exchange structure with a solid-phase change working medium in the liquid cooling plate manufacturing equipment of the embodiment of the present application;

[0026] Figure 4 It is a schematic cross-sectional view of the heat exchange structure with a liquid-phase change working medium in the liquid cooling plate manufacturing equipment of the embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram of the air inflation device of the liquid cooling plate manufacturing equipment of the embodiment of the present application for inflating and expanding the liquid cooling plate;

[0028] Figure 6 For Figure 5 It is an enlarged schematic diagram at position B in

[0029] Figure 7 It is an exploded schematic diagram of the battery of the embodiment of the present application;

[0030] Figure 8 It is a schematic structural diagram of the electrical equipment of the embodiment of the present application.

[0031] Among them, the reference numerals in the figure:

[0032] 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 tip; 122. Pressing roller;

[0033] 20. Air inflation device;

[0034] 200. Liquid cooling plate;

[0035] 210. First cold plate; 220. Second cold plate; 230. Coolant flow channel; 241. First flow port; 242. Second flow port;

[0036] 300. Battery;

[0037] 310. Box housing; 311. Box main body; 312. Box cover; 313. Assembly space; 320. Battery cell

[0038] 400. Electrical equipment

[0039] 410. Driving motor; 420. Frame; 430. Wheel Detailed implementation manners

[0040] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0042] In addition, terms such as "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0043] In the present application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] Currently, in order to meet the requirements of high endurance, electric vehicles generally use a plurality of battery cells combined into a battery to store and supply electricity through the battery, so as to store a large amount of electricity to ensure high endurance.

[0045] During the charging and discharging process of the battery, a large amount of heat is generated by the battery. In order to quickly remove the heat generated by the battery so that the battery can always be maintained within the normal operating temperature range, therefore, the technology of using a liquid cooling plate for heat dissipation and temperature reduction inside the battery is widely adopted. The liquid cooling plate takes away the heat generated by the battery through the coolant continuously flowing in the flow channels inside the plate, thereby enabling the battery to achieve rapid heat dissipation and temperature reduction.

[0046] In the related art, a liquid cooling plate is formed by welding two plates, thereby forming a coolant flow channel between the two plates. During the welding operation of the two plates, the welding heat acts on the plates. Generally, no heat dissipation measures are taken during the welding of the two plates, and heat dissipation is carried out through a simple air-cooling method. However, since the welding heat acts concentratedly at the welding position of the plates in a short period of time, the air-cooling method cannot dissipate heat in time, so it is easy to cause the plates to undergo thermal deformation, and then the formed liquid cooling plate cannot meet the product requirements.

[0047] Based on the above considerations, the embodiments of the present application provide a liquid cooling plate manufacturing device. Using this liquid cooling plate manufacturing device, the first cold plate and the second cold plate are welded and formed to obtain a liquid cooling plate. During the welding of the liquid cooling plate, when the welding head welds the first cold plate and the second cold plate, the heat exchange structure dissipates heat and reduces the temperature of the liquid cooling plate, thereby preventing the liquid cooling plate from deforming due to the action of concentrated heat during the welding process, increasing the probability that the welded and formed liquid cooling plate meets the product requirements, and improving the product yield of the liquid cooling plate. And, the manufactured liquid cooling plate is used for assembling the battery to dissipate heat and reduce the temperature during the charging and discharging operation of the battery, thereby ensuring that the battery is charged and discharged within the normal operating temperature range. Further, the assembled battery is applied to an electrical device to provide electrical energy for the electrical load on the electrical device.

[0048] As Figures 1 to 4As shown in the figure, an embodiment of the present application provides a liquid cooling plate manufacturing device for manufacturing a liquid cooling plate 200. The liquid cooling plate manufacturing device includes a welding device 10 for performing welding operations in the production process of manufacturing the liquid cooling plate 200. Among them, 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 fluid 112. The heat exchange plate 111 is formed with an accommodation space 1111, and the phase change working fluid 112 is accommodated in the accommodation space 1111. Among them, the heat exchange plate 111 has a contact side 1112 for abutting against the liquid cooling plate 200 and an open side 1113 facing away from the contact side 1112. The welding head 12 is used to abut against one side of the liquid cooling plate 200 facing away from the heat exchange structure 11 and weld the liquid cooling plate 200. Among them, the open side 1113 of the heat exchange plate 111 refers to the 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 heat exchange occurs between the open side 1113 and the air.

[0049] During the process of manufacturing the liquid cooling plate 200 using this liquid cooling plate manufacturing device, the welding operation is performed through the welding device 10, and thus the liquid cooling plate 200 is welded and formed. During the welding operation, the welding head 12 generates a large amount of heat in a short period of 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 facing away from the welding head 12, therefore, the heat generated by the welding head 12 acting on the liquid cooling plate 200 can be quickly transferred to the heat exchange plate 111. And, since the phase change working fluid 112 is accommodated in the accommodation space 1111, therefore, the phase change working fluid 112 can immediately absorb the heat transferred to the heat exchange plate 111, and then the phase change working fluid 112 undergoes a phase change, and the heat is exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby realizing 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, increasing the probability that the welded and formed liquid cooling plate 200 meets the product requirements, making the welded liquid cooling plate 200 meet the flatness requirements (that is, the liquid cooling plate 200 is flat and does not warp), and improving the product yield of the liquid cooling plate 200.

[0050] Among them, the phase change working fluid 112 refers to a substance that can change from one form to another after absorbing heat. For example, the phase change working fluid 112 is in a liquid state at room temperature. During the process of the phase change working fluid 112 absorbing heat, the phase change working fluid 112 can change from a liquid state to a gaseous state, that is, the phase change working fluid 112 vaporizes from a liquid state to a gaseous state after being heated. Another example is that the phase change working fluid 112 is in a solid state at room temperature. During the process of the phase change working fluid 112 absorbing heat, the phase change working fluid 112 can change from a solid state to a liquid state, that is, the phase change working fluid 112 melts from a solid state to a liquid state after being heated. Still another example is that the phase change working fluid 112 is in a solid state at room temperature. During the process of the phase change working fluid 112 absorbing heat, the phase change working fluid 112 can change from a solid state to a gaseous state, that is, the phase change working fluid 112 sublimates from a solid state to a gaseous state after being heated.

[0051] In some embodiments of the present application, as Figure 4 shown, the phase change working fluid 112 is a liquid working fluid that vaporizes when heated. During the welding process of the liquid cooling plate 200, the liquid phase change working fluid 112 quickly absorbs the heat generated by welding and then vaporizes into a gaseous state. The gaseous phase change working fluid 112 carries heat and contacts 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 heat dissipation during the welding process of the liquid cooling plate 200, reducing the probability of thermal deformation of the liquid cooling plate 200, increasing the probability that the welded liquid cooling plate 200 meets the product requirements, and improving the product yield of the liquid cooling plate 200.

[0052] Specifically, when the phase change working fluid 112 is a liquid working fluid that vaporizes when heated, the liquid phase change working fluid 112 does not fill the accommodation space 1111 of the heat exchange plate 111, and the part of the accommodation space 1111 not filled with the liquid phase change working fluid 112 is used to accommodate the gaseous phase change working fluid 112 when the phase change working fluid 112 vaporizes. In this way, the vaporized gaseous phase change working fluid 112 can carry heat and diffuse.

[0053] In some embodiments of the present application, when the phase change working fluid 112 is a liquid working fluid that vaporizes when heated, in the direction of gravity, the heat exchange structure 11 is located above the welding head 12. In this way, during the welding process of the liquid cooling plate 200, the liquid phase change working fluid 112 stays on the contact side 1112 under the action of gravity. This enables the phase change working fluid 112 to absorb the heat generated by welding more quickly. And, as Figure 4 shown, Figure 4The hollow arrow indicates the upward direction of the phase change working fluid vaporization. That is to say, the liquid phase change working fluid 112 rapidly absorbs the heat generated by welding and vaporizes into the gaseous phase change working fluid 112 and rises, contacting 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 during the welding process of the liquid cooling plate 200. When the gaseous phase change working fluid 112 after vaporization touches the contact side 1112, the gaseous phase change working fluid 112 transfers heat to the open side 1113. Therefore, the gaseous phase change working fluid 112 releases heat, and thus the gaseous phase change working fluid 112 is condensed into the liquid phase change working fluid 112 by the open side 1113. Then, the condensed phase change working fluid 112 flows down again under the action of gravity and continues to absorb the heat generated by welding. Such a cycle is carried out to realize timely and rapid heat dissipation during the welding process of the liquid cooling plate 200, thereby reducing the probability of thermal deformation of the liquid cooling plate 200, increasing the probability that the welded liquid cooling plate 200 meets the product requirements, and improving the product yield of the liquid cooling plate 200.

[0054] In some other embodiments of the present application, when the phase change working fluid 112 is a liquid working fluid that vaporizes when heated, in the direction of gravity, the heat exchange structure 11 can also be located below the welding head 12. At this time, the liquid phase change working fluid 112 stays on the open side 1113 under the action of gravity. In this way, during the welding process of the liquid cooling plate 200, the heat generated by welding is transferred to the heat exchange plate 111, and then the liquid phase change working fluid 112 absorbs heat from the heat exchange plate 111, thereby dissipating heat and cooling down the welding process of the liquid cooling plate 200. Compared with the related art where no heat dissipation and cooling measures are taken for the welding process, this embodiment can also reduce the probability of thermal deformation of the liquid cooling plate 200 during the welding process to a certain extent, and then increase the product yield of the liquid cooling plate 200.

[0055] In some embodiments of the present application, as Figure 3 shown, the phase change working fluid 112 is a solid working fluid that liquefies or vaporizes when heated. And, in the direction of gravity, the heat exchange structure 11 is located above the welding head 12. Generally, when the solid phase change working fluid 112 is initially filled into the accommodation space 1111, the solid phase change working fluid 112 is attached and fixed to the inner wall of the contact side 1112. In this way, during the welding process of the liquid cooling plate 200, the solid phase change working fluid 112 rapidly absorbs the heat generated by welding and vaporizes into the gaseous phase change working fluid 112 and rises, Figure 3The hollow arrow indicates the upward direction of the phase change working fluid vaporization and contacts the open side 1113, enabling heat to 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 vaporized gaseous phase change working fluid 112 touches the contact side 1112, the gaseous phase change working fluid 112 transfers heat to the open side 1113. Therefore, the gaseous phase change working fluid 112 releases heat, and thus the gaseous phase change working fluid 112 is condensed into the liquid phase change working fluid 112 by the open side 1113. Then, the condensed phase change working fluid 112 flows down again under the action of gravity and continues to absorb the heat generated by welding. Subsequently, the flowing-down liquid phase change working fluid 112 is vaporized into a gas and rises to the open side 1113. Such a cycle is carried out to achieve timely and rapid heat dissipation during the welding process of the liquid cooling plate 200, thereby reducing the probability of thermal deformation of the liquid cooling plate 200, increasing the probability that the welded liquid cooling plate 200 meets the product requirements, and improving the product yield of the liquid cooling plate 200.

[0056] In some other embodiments of the present application, as Figure 3 shown, the phase change working fluid 112 is a solid working fluid that liquefies or vaporizes when heated. Generally, when the solid phase change working fluid 112 is initially filled into the accommodation space 1111, the solid phase change working fluid 112 is attached and fixed to the inner wall of the contact side 1112. In this embodiment, in the direction of gravity, the heat exchange structure 11 is located below the welding head 12. During the welding process of the liquid cooling plate 200, the solid phase change working fluid 112 quickly absorbs the heat generated by welding and vaporizes into the gaseous phase change working fluid 112. The gaseous phase change working fluid 112 diffuses and touches the open side 1113, enabling heat to 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 vaporized gaseous phase change working fluid 112 touches the contact side 1112, the gaseous phase change working fluid 112 transfers heat to the open side 1113. Therefore, the gaseous phase change working fluid 112 releases heat, and thus the gaseous phase change working fluid 112 is condensed into the liquid phase change working fluid 112 by the open side 1113. At this time, the liquid phase change working fluid 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 fluid 112 continues to absorb heat from the heat exchange plate 111, thereby dissipating heat and cooling down the welding process of the liquid cooling plate 200. Compared with the related art where no heat dissipation and cooling measures are taken during the welding process, this embodiment can also reduce the probability of thermal deformation of the liquid cooling plate 200 during the welding process to a certain extent, and then improve the product yield of the liquid cooling plate 200.

[0057] In some embodiments of the present application, as Figure 2As shown, the welding head 12 includes a welding tip 121 and at least two pressing rollers 122. The welding tip 121 is used to weld the liquid cooling plate 200 to form a coolant flow channel 230 between adjacent weld seams. The pressing rollers 122 are respectively located on both sides of the welding tip 121, and during the process of the welding tip 121 performing welding operations on the liquid cooling plate 200, the pressing rollers 122 located on both sides of the welding tip 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 tip 121 abut and press the liquid cooling plate 200, which can not only perform pressing and positioning on the liquid cooling plate 200 to prevent the liquid cooling plate 200 from shifting, thereby ensuring that the welding position of the welding tip 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 concentrated heat generated by the welding tip 121, preventing the liquid cooling plate 200 from warping and deforming due to heat.

[0058] In some embodiments of the present application, as Figure 2 shown, the number of pressing rollers 122 is two, and the two pressing rollers 122 are respectively located on both sides of the welding tip 121. That is to say, the welding tip 121 and the two pressing rollers 122 are arranged in a left-middle-right arrangement, and the welding tip 121 is located in the middle position between the two pressing rollers 122. During the process of the welding tip 121 performing welding operations on the liquid cooling plate 200, the two pressing rollers 122 located on both sides of the welding tip 121 are used to simultaneously abut against the liquid cooling plate 200. In this way, it can not only perform pressing and positioning on the liquid cooling plate 200 to prevent the liquid cooling plate 200 from shifting, thereby ensuring that the welding position of the welding tip 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 concentrated heat generated by the welding tip 121, preventing the liquid cooling plate 200 from warping and deforming due to heat.

[0059] In some embodiments of the present application, the welding tip 121 includes but is not limited to a laser welding tip, that is, laser welding is performed on the liquid cooling plate 200 to form a shape. Among them, "laser welding" is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source, and is an important aspect of the application of laser material processing technology. The welding process belongs to the 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. By controlling 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 to the precision welding of micro and small parts.

[0060] According to the second aspect of the present application, a liquid cooling plate 200 is provided. As Figure 1 、 Figure 2 、 Figure 5 and Figure 6As shown, the liquid cooling plate 200 includes a first cold plate 210 and a second cold plate 220, and the first cold plate 210 and the second cold plate 220 are stacked. Then, the first cold plate 210 and the second cold plate 220 are welded by a welding device 10 of a liquid cooling plate manufacturing device, so that the first cold plate 210 and the second cold plate 220 are compositely formed into the liquid cooling plate 200, and a coolant flow channel 230 for the coolant to flow and fill is formed.

[0061] Since the channel cross-section of the coolant flow channel 230 of the liquid cooling plate 200 formed by stacking and welding the first cold plate 210 and the second cold plate 220 is small, that is, the flow capacity of the coolant flow channel 230 is small, therefore, in some embodiments of the present application, such as Figure 5 and Figure 6 As shown, the liquid cooling plate manufacturing equipment also includes an air expansion device 20, which is used to expand the coolant flow channel 230, thereby improving the flow capacity of the coolant flow channel 230. Among them, the air expansion device 20 is used to communicate with the coolant flow channel 230 after welding is completed, and the air expansion device 20 is used to blow air into the coolant flow channel 230 to expand the coolant flow channel 230, so that the coolant flow channel 230 is expanded by air expansion, thereby improving the flow capacity of the coolant flow channel 230. That is, the flow rate of the coolant that is allowed to flow through the coolant flow channel 230 per unit time becomes larger, so that the coolant flowing in the coolant 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 within the normal operating temperature range for charging and discharging.

[0062] Furthermore, during the process of the gas expansion device 20 expanding the coolant flow channel 230, the force of the gas acting on the inner wall of the coolant flow channel 230 is relatively slow, gentle and uniform. Therefore, the risk of the weld between the first cold plate 210 and the second cold plate 220 being instantly cracked can be greatly reduced by expanding the coolant flow channel 230 with gas through the gas expansion device 20. In this way, the liquid cooling plate 200 can be better protected and the product yield of the liquid cooling plate 200 can be improved.

[0063] In some embodiments of the present application, the liquid cooling plate manufacturing device further includes a runner forming template (not shown), and the runner forming template is provided with an expansion groove that is consistent with the trend of the coolant runner 230 (that is, the extension direction of the expansion groove is consistent with the extension direction of the coolant runner 230). Moreover, when the air inflation device 20 inflates the coolant runner 230, the runner forming template covers one side of the liquid cooling plate 200, and the expansion groove is disposed opposite to the coolant runner 230. When performing the air inflation operation on the coolant runner 230 of the liquid cooling plate 200, the inflated part of the liquid cooling plate 200 will be received into the expansion groove. When the inflated part abuts against the groove wall of the expansion groove, the coolant runner 230 stops further expanding. In this way, the coolant runner 230 is uniformly inflated and expanded, that is, the channel apertures at various positions of the coolant runner 230 after inflation and expansion are the same. Moreover, by restricting the air inflation of the coolant runner 230 of the liquid cooling plate 200 through the expansion groove of the runner forming template, the liquid cooling plate 200 is not easily torn by air inflation, and the product yield of the liquid cooling plate 200 is improved. Among them, only one runner forming template needs to be prepared in this embodiment, and there is no need to manufacture two runner forming templates for clamping and assembling the liquid cooling plate 200, thereby saving the mold opening cost. That is to say, when assembling the welded liquid cooling plate 200 by using the runner forming template, one side surface of the liquid cooling plate 200 is placed on the workbench surface of the air inflation device 20, then the runner forming template is stacked on the liquid cooling plate 200, and then the runner forming template is fixedly connected to the workbench surface of the air inflation device 20, so that the runner forming template presses and fixes the liquid cooling plate 200 on the workbench surface of the air inflation device 20, and then the coolant runner 230 is inflated and expanded.

[0064] In the liquid cooling plate 200 provided by the present application, as Figure 1 、 Figure 2 、 Figure 5 and Figure 6 shown, the first cold plate 210 and the second cold plate 220 of the liquid cooling plate 200 are welded and formed by the aforementioned liquid cooling plate manufacturing device. Moreover, the coolant runner 230 is expanded and formed by the air inflation device of the aforementioned liquid cooling plate manufacturing device.

[0065] The embodiments of the present application adopt the following design scheme for manufacturing the liquid cooling plate 200 by using the liquid cooling plate manufacturing device:

[0066] The accommodation space 1111 of the heat exchange plate 111 is filled with a liquid phase change working medium 112 that is vaporized by heat (the phase change working medium 112 is in a liquid state at room temperature), but the liquid phase change working medium 112 does not completely fill the accommodation space 1111. When welding the liquid cooling plate 200, the arrangement order of the various components of the welding device 10 and the liquid cooling plate 200 from top to bottom is the heat exchange structure 11, the liquid cooling plate 200, and the welding head 12. In this way, the liquid phase change working medium 112 stays on the contact side 1112 under the action of gravity, enabling the phase change working medium 112 to more quickly absorb the heat generated by welding. 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 vaporizes into a gaseous phase change working medium 112 and rises, contacting the open side 1113, enabling the heat to be exchanged from the open side 1113 of the heat exchange plate 111 to the air, thereby realizing timely and rapid heat dissipation during the welding process of the liquid cooling plate 200. When the gaseous phase change working medium 112 after vaporization 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 is condensed into a 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. This cycle repeats. In the embodiment of the present application, the first cold plate 210 and the second cold plate 220 are welded by a laser welding head. And, during the welding process, pressing rollers 122 are respectively arranged on both sides of the laser welding head, which can not only 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 concentrated heat generated by the welding head 121, preventing the liquid cooling plate 200 from warping and deforming due to heat. Further, after welding the liquid cooling plate 200, the coolant flow channel 230 obtained by welding is inflated by an air inflation device 20, improving the flow capacity of the coolant flow channel 230.

[0067] According to the third aspect of the present application, a battery 300 is provided, as Figure 7 shown, the battery 300 includes the liquid cooling plate 200 as described above and a plurality of battery cells 320. As Figure 7As shown, the battery 300 includes a case 310 and battery cells 320. The case 310 forms an assembly space 313. Among them, the case 310 includes a case body 311 and a case cover 312. The case cover 312 covers the opening of the case body 311 to form a sealed assembly space 313. The liquid cooling plate 200 is installed at the bottom of the assembly space 313. The battery cells 320 are installed in the assembly space 313 and are in contact with the liquid cooling plate 200. The corresponding coolant input pipe passes through the case 310 and is communicated with the first flow port 241 of the liquid cooling plate 200, so as to convey coolant into the coolant flow channel 230 of the liquid cooling plate 200. The coolant flows to fill the coolant flow channel 230, and then the coolant is output from the second flow port 242. The coolant circulates in this way, so as to dissipate heat and cool down the battery 300 during the charging and discharging process. In this battery 300, the liquid cooling plate 200 is directly in contact with the battery cells 320, so that the heat generated by the battery cells 320 during the charging and discharging process can be directly and quickly transferred to the liquid cooling plate 200. Then, the coolant of the liquid cooling plate 200 takes away the heat during the continuous flowing process, so as to dissipate heat and cool down the battery 300 during the charging and discharging process. The liquid cooling effect is obvious, and it prevents the working temperature of the battery 300 from being too high during the charging and discharging process and affecting the normal operation.

[0068] According to the fourth aspect of the present application, an electrical device 400 is provided, such as Figure 8 shown. Among them, the electrical device 400 includes the battery 300 as described above, uses the battery 300 for charging and energy storage, and uses the battery 300 for discharging to provide electrical energy for the electrical load of the electrical device 400.

[0069] The electrical device 400 includes but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecrafts, etc. Among them, the electric toy can include but is not limited to fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include but is not limited to airplanes, rockets, space shuttles, and spaceships, etc.

[0070] In the embodiment of the present application, the electrical device 400 is an electric vehicle, such as Figure 8 shown. The battery 300 is installed on the vehicle frame 420 of the electric vehicle. Using the battery 300 provided by the embodiment of the present application to supply power to the drive motor 410 (i.e., the electrical load of the electrical device 400) of the electric vehicle, the drive motor 410 drives the wheels 430 to rotate, so that the electric vehicle can run normally.

[0071] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A liquid cooling plate manufacturing device, characterized in that, Comprising a welding device, the welding device includes: A heat exchange structure, including a heat exchange plate and a phase change working medium. The heat exchange plate forms an accommodation space, and the phase change working medium is 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 facing away from the contact side; A welding head for welding the side of the liquid cooling plate facing 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 vaporizes when heated.

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 liquefies or vaporizes when heated, and in the direction of gravity, the heat exchange structure is located above the welding head.

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 liquefies or vaporizes when heated, and in the direction of gravity, the heat exchange structure is located below the welding head.

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

7. The liquid cooling plate manufacturing equipment according to any one of claims 1-5, characterized in that: The welding head includes a welding tip and at least two pressing rollers. The pressing rollers are respectively located on both sides of the welding tip, and the pressing rollers are used to simultaneously abut against the liquid cooling plate, and the welding tip is used to weld the liquid cooling plate so as to form a coolant flow channel between adjacent welds.

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

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

10. The liquid cooling plate manufacturing equipment according to claim 7, characterized in that: The liquid cooling plate manufacturing equipment further includes an air inflation device. The air inflation device is used to communicate with the coolant flow channel after welding, and the air inflation device is used to inflate 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 further includes a flow channel forming template. The flow channel forming template 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 inflation device inflates the coolant flow channel, and the expansion groove is arranged opposite to the coolant flow channel.

12. A liquid cooling plate, characterized in that, Including a first cold plate and a second cold plate, 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 1-11; or The first cold plate and the second cold plate are formed by welding through the liquid-cooled plate manufacturing equipment described in claim 10 or 11, and the coolant flow channels are formed by expanding through the air inflation device.

13. A battery, characterized in that, It includes the liquid-cooled plate described in claim 12.

14. An electrical device, characterized in that, It includes the battery described in claim 13.

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