Liquid cooling plate, energy storage device and electric equipment

Abstract

The application discloses a liquid cooling plate, an energy storage device and an electric equipment. The liquid cooling plate comprises a first cooling plate, a second cooling plate, a support and solder. The second cooling plate is arranged in layers with the first cooling plate and is connected in a sealed manner. The support is arranged between the first cooling plate and the second cooling plate and separates a cavity surrounded by the first cooling plate and the second cooling plate into a first flow channel and a second flow channel. The support has a first side facing the first cooling plate and a second side arranged in a reverse direction to the first side along the thickness direction of the liquid cooling plate. The first side and the first cooling plate have a first solder storage structure therebetween, and the second side and the second cooling plate have a second solder storage structure therebetween. The first solder storage structure is in communication with the first flow channel and the second flow channel respectively, and the second solder storage structure is in communication with the first flow channel and the second flow channel respectively. The solder is bonded between the first side and the first cooling plate and between the second side and the second cooling plate and is accommodated in the first solder storage structure and the second solder storage structure.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to a liquid cooling plate, an energy storage device, and an electrical device. Background Technology

[0002] Existing energy storage devices include a battery box and multiple battery modules connected in series within the battery box to increase the power supply capacity of the energy storage device. During charging and discharging, the battery modules inevitably generate heat, which accumulates inside the battery box. To prevent excessively high temperatures inside the battery box, a liquid cooling plate with flow channels is typically installed inside the battery box to exchange heat with the battery box through the flow of fluid within the channels.

[0003] Currently, liquid cooling plates include a first cold plate and a second cold plate stacked on top of each other, and a support member disposed between the first cold plate and the second cold plate. The support member is disposed between the first cold plate and the second cold plate, and the three form a microchannel for fluid flow.

[0004] In related technologies, brazing is typically used to seal the first and second cold plates together, and to fix the support member to both the first and second cold plates. Specifically, a layer of solder is applied to both facing surfaces of the first and second cold plates. The support member is then assembled between the first and second cold plates, with one layer of solder between the support member and the first cold plate, and another layer between the support member and the second cold plate. Next, the assembled liquid-cooled plates are placed in a heated environment to weld the first and second cold plates, the support member to the first cold plate, and the support member to the second cold plate.

[0005] However, excessively high welding temperatures and / or long welding times can cause the base material (including the first cold plate, the second cold plate, and the support components) to melt, leading to an increase in the amount of solder. This can cause solder to accumulate inside the liquid cooling plate, resulting in microchannel blockage and ultimately affecting heat dissipation efficiency. Summary of the Invention

[0006] This application provides a liquid cooling plate, an energy storage device, and an electrical device to improve the problem of solder clogging the flow channel.

[0007] The liquid cooling plate in this embodiment includes:

[0008] First cold plate;

[0009] The second cold plate is stacked and sealed together with the first cold plate;

[0010] A support member is disposed between the first cold plate and the second cold plate, and divides the cavity formed by the first cold plate and the second cold plate into a first flow channel and a second flow channel; the support member has a first side facing the first cold plate and a second side disposed opposite to the first side along the thickness direction of the liquid-cooled plate; a first storage structure is provided between the first side and the first cold plate, and a second storage structure is provided between the second side and the second cold plate; the first storage structure is connected to the first flow channel and the second flow channel respectively, and the second storage structure is connected to the first flow channel and the second flow channel respectively; and

[0011] Solder is bonded between the first side and the first cold plate and between the second side and the second cold plate, and is contained within the first storage structure and the second storage structure.

[0012] In this embodiment, a first material storage structure is provided between the first side of the support member and the first cold plate, and a second material storage structure is provided between the second side of the support member and the second cold plate. During welding, solder can bond between the first side of the support member and the first cold plate, and between the second side of the support member and the second cold plate, thereby fixing the support member to the first and second cold plates. Excess solder can flow into the first and second material storage structures, preventing excess solder from flowing into the first and second flow channels and causing blockage, which would affect the overall heat dissipation efficiency of the liquid cooling plate.

[0013] Optionally, the first storage structure is disposed on the first side of the support member, and the second storage structure is disposed on the second side of the support member.

[0014] In this embodiment of the application, the first and second material storage structures are both disposed on the support member, rather than on the first and second cold plates. This ensures the integrity of the first and second cold plate structures, facilitates the processing of the first and second cold plates by stamping, and improves processing efficiency.

[0015] Optionally, the first storage structure includes at least one first storage trough; the support member includes:

[0016] The body has a first surface facing the first cold plate; and

[0017] Multiple first protrusions are provided on the first surface and arranged side by side along the length of the liquid cooling plate; wherein, a first storage trough is formed between every two adjacent first protrusions, and each first storage trough is connected to the first flow channel and the second flow channel respectively;

[0018] The solder is bonded between the plurality of first protrusions and the first cold plate, and is contained in the first storage tank.

[0019] In this embodiment, the support member has a plurality of first protrusions on its first surface facing the first cold plate, and a first storage groove is formed between every two adjacent first protrusions. Thus, on the first surface of the support member, a structure is formed in which the first protrusions and the first storage groove are alternately arranged along the length of the liquid cooling plate. On the one hand, the welding strength between the support member and the first cold plate is guaranteed; on the other hand, the first storage groove can store excess solder, preventing solder from clogging the first flow channel and / or the second flow channel.

[0020] Optionally, the body has a first side and a second side disposed opposite to each other along the width direction of the liquid cooling plate, the first side forming the inner wall surface of the first flow channel, and the second side forming the inner wall surface of the second flow channel.

[0021] The two end faces of each of the first protrusions are flush with the first side face and the second side face, respectively.

[0022] In this embodiment, the two end faces of each first protrusion are flush with the first side and the second side, respectively. Therefore, the first storage groove formed between any two adjacent first protrusions is equivalent to penetrating the inner wall of the first flow channel and the inner wall of the second flow channel, respectively. Thus, excess solder located on the first side of the body can flow into the first storage groove through one end, and excess solder located on the second side of the body can flow into the second storage groove through the other end, preventing excess solder from accumulating on the first and second sides of the body and thus blocking the first and second flow channels.

[0023] Optionally, the two ends of the first cold plate extend beyond the two end faces of the body;

[0024] The support member further includes two first end protrusions, which protrude from the first surface; a plurality of first protrusions are located between the two first end protrusions, and the plurality of first protrusions and the two first end protrusions are arranged side by side;

[0025] The two outermost first protrusions of the plurality of first protrusions respectively form a second storage trough between the two first end protrusions, and each second storage trough is connected to the first flow channel and the second flow channel respectively; the first storage structure further includes two second storage troughs; wherein, the solder is also bonded between each first end protrusion and the first cold plate, and is also contained in the second storage trough;

[0026] The length of each of the first end protrusions is less than the distance between the first side and the second side.

[0027] In this embodiment, since the length of each first end protrusion is less than the distance between the first side and the second side, at least one end of the first end protrusion does not extend to the side of the body. In other words, at least one of the first side and the second side has an opening between itself and the first end protrusion. The opening facilitates the flow of excess solder on the end face of the body into the second storage tank, preventing excess solder from accumulating on the end face of the body.

[0028] Optionally, the two first end protrusions have two third side surfaces facing away from each other along the length of the liquid cooling plate, and the two third side surfaces are respectively flush with the two end faces of the body.

[0029] Optionally, the two first end protrusions also have two fourth sides facing each other along the length of the liquid cooling plate;

[0030] Each of the first end protrusions has a bevel at both ends along the width direction of the liquid cooling plate. The two bevels of each first end protrusion are respectively connected to the two ends of the fourth side and extend from the fourth side in a direction that moves away from each other and gradually approaches the third side.

[0031] In the embodiments of this application, since the two inclined surfaces of each first end protrusion are respectively connected to the two ends of the fourth side and extend from the fourth side in a direction away from each other and gradually closer to the third side, the slot openings at both ends of the second storage tank along the width direction of the liquid cooling plate form an outward expansion structure to increase the flow area of ​​the second storage tank at the opening, which helps excess solder to flow into the second storage tank.

[0032] Optionally, each of the first end protrusions is further provided with an outer arc surface at both ends along the width direction of the liquid cooling plate;

[0033] One end of each of the two outer arc surfaces is connected to one end of each of the two inclined surfaces away from the fourth side surface, and the other end of each of the two outer arc surfaces is connected to both ends of the third side surface.

[0034] Each of the outer circular arc surfaces is tangent to the inclined surface and the third side surface, respectively.

[0035] According to capillary action, if the liquid surface is curved, it tends to flatten. Therefore, a concave liquid surface exerts a pulling force on the surrounding liquid. Specifically, in this embodiment, since the two ends of the first end protrusion are also provided with outer arc surfaces, the liquid surface of the solder liquid attached to the outer arc surface is a concave liquid surface. Thus, the concave liquid surface exerts a pulling force on the surrounding solder liquid, thereby pulling the solder liquid located on the end face of the body into the second storage tank.

[0036] Optionally, the angle between the inclined surface of each of the first end protrusions and the third side surface is between 30 degrees and 45 degrees.

[0037] Optionally, the two first end protrusions have two fourth sides facing each other along the length of the liquid cooling plate;

[0038] Each of the first protrusions has two fifth sides disposed opposite to each other along the length of the liquid cooling plate, and there is a first distance between the two fifth sides facing each other in two adjacent first protrusions.

[0039] The outermost fifth side of the plurality of first protrusions has a second distance between it and the fourth side of the corresponding first end protrusion;

[0040] The second distance is greater than the first distance.

[0041] In this embodiment, since the first storage tank is used to store solder located on the first side and the second side, and the second storage tank is used not only to store excess solder located on the first side and the second side, but also to store excess solder located on the end face of the body, by designing the second distance to be greater than the first distance, the width of the second storage tank can be greater than the width of the first storage tank, thereby achieving a larger volume of the second storage tank so that the second storage tank can store more solder and avoid the situation where the space inside the second storage tank is full and excess solder cannot flow into the second storage tank.

[0042] Optionally, the first cold plate includes a first arch and two first welded portions, the two first welded portions being respectively connected to both sides of the first arch along the width direction of the liquid cooling plate;

[0043] The second cold plate includes a second arched portion and two second welded portions, the two second welded portions being respectively connected to both sides of the second arched portion along the width direction of the liquid cooling plate;

[0044] The first arched portion and the second arched portion are positioned correspondingly, and along the thickness direction of the liquid cooling plate, the first arched portion and the second arched portion arch away from each other; the first storage structure is disposed between the first side and the first arched portion, and the second storage structure is disposed between the second side and the second arched portion;

[0045] The two first welded portions correspond to the positions of the two second welded portions, and the solder is also bonded between the corresponding first welded portions and second welded portions.

[0046] In the embodiments of this application, both the first cold plate and the second cold plate include an arched portion and two welded portions, so that both the first cold plate and the second cold plate form a plate-like structure with a central protrusion. The connection between the arched portion and the welded portions can better adapt to the shape of other components in the battery pack, so as to make full use of the space in the battery pack and improve the space utilization rate.

[0047] Optionally, the structure of the first side of the support member is the same as that of the second side, and they are symmetrically arranged in the thickness direction of the liquid cooling plate.

[0048] The energy storage device of this application embodiment includes any of the liquid cooling plates described above.

[0049] The electrical equipment in this application embodiment includes the energy storage device described above, and the energy storage device supplies power to the electrical equipment. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of a residential energy storage system according to an exemplary embodiment.

[0051] Figure 2 This is an exploded schematic diagram of an energy storage device according to an exemplary embodiment.

[0052] Figure 3 This is an exploded view of a liquid cooling plate according to an exemplary embodiment.

[0053] Figure 4 This is a schematic diagram of the structure of a liquid cooling plate according to an exemplary embodiment.

[0054] Figure 5 This is a schematic diagram of the structure of a liquid cooling plate according to another exemplary embodiment.

[0055] Figure 6 yes Figure 3 A schematic diagram of the support component from one perspective.

[0056] Figure 7 yes Figure 3 A schematic diagram of the support components from another perspective.

[0057] Figure 8 yes Figure 6 A magnified view of the area at point X1.

[0058] Figure 9 This is a schematic diagram of the structure of an electrical device according to an exemplary embodiment.

[0059] The reference numerals in the attached figures are explained as follows:

[0060] 1. Energy storage device;

[0061] 2. Power conversion device;

[0062] 3. User load;

[0063] 10. Electrical equipment; 11. Load;

[0064] 200. Box body; 210. Top cover; 220. Bottom shell;

[0065] 400. Battery module; 411. Single cell;

[0066] 600, Liquid-cooled plate; 610, First cold plate; 611, First arched portion; 612, First welded portion; 620, Second cold plate; 621, Second arched portion; 622, Second welded portion; 630, Support member; 630a, First side; 630b, Second side; 630c, Sub-channel; 631, Body; 631a, First surface; 631b, Second surface; 631c, First side surface; 631d 631e, Second side surface; 632, End face; 633a, First convex strip; 634, Fifth side surface; 635, First storage trough; 636, Second convex strip; 637, Third storage trough; 638, Second end convex strip; 639, Fourth storage trough;

[0067] 640. Solder;

[0068] 651. First flow channel; 652. Second flow channel;

[0069] 661. First storage structure; 662. Second storage structure;

[0070] D1, length direction; D2, width direction; D3, thickness direction. Detailed Implementation

[0071] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0072] Since the energy people need is highly time- and space-dependent, in order to make rational use of energy and improve energy efficiency, it is necessary to use a medium or device to store one form of energy in the same way or by converting it into another form of energy, and then release it in a specific form of energy based on future application needs.

[0073] Currently, green energy mainly includes solar energy, wind energy, and hydropower. However, solar and wind energy generally suffer from strong intermittency and large fluctuations, which can cause voltage instability in the green power grid (insufficient electricity during peak demand and excessive electricity during off-peak demand). Unstable voltage can damage the power grid, and therefore may lead to the problem of "curtailment of wind and solar power" due to insufficient electricity demand or insufficient grid capacity.

[0074] To solve the problem of insufficient electricity demand or inadequate grid capacity, we must rely on energy storage devices. These devices convert electrical energy into other forms of energy through physical or chemical means and store it. When needed, the stored energy is converted back into electrical energy and released. Simply put, an energy storage device is like a large "power bank," storing electrical energy when solar and wind power are abundant and releasing it when required.

[0075] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, renewable energy grid-connected energy storage, and user-side energy storage. The corresponding types of energy storage devices include:

[0076] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, enabling load matching of electrical energy in time and space, enhancing the absorption capacity of renewable energy, and playing a significant role in grid system backup, alleviating peak load power supply pressure, and peak regulation and frequency regulation.

[0077] (2) Small and medium-sized energy storage cabinets used in commercial and industrial energy storage scenarios (banks, shopping malls, etc.) and small household energy storage boxes used in residential energy storage scenarios primarily operate under the "peak shaving and valley filling" mode. Because there are significant price differences in electricity consumption during peak and off-peak periods, users with energy storage devices typically charge the cabinets / boxes during off-peak hours to reduce costs; during peak hours, they release the stored electricity for use, thus saving on electricity bills. Furthermore, in remote areas and regions prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices effectively provides backup power for users and the power grid, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0078] This explanation will take the residential energy storage scenario in user-side energy storage as an example. Figure 1A residential energy storage system is illustrated, comprising an energy storage device 1, a power conversion device 2 (such as a photovoltaic panel), and user loads 3 (such as streetlights, household appliances, etc.). The energy storage device 1 is a small energy storage box that can be wall-mounted to an outdoor wall. Specifically, the power conversion device 2 can convert solar energy into electrical energy during periods of low electricity prices and store it through the energy storage device 1, then supply it to the user loads 3 during periods of high electricity prices, or supply it to the user loads 3 during power outages / power interruptions.

[0079] In conjunction with the aforementioned energy storage methods using physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage device 1 includes at least one set of chemical batteries. The chemical elements within these batteries serve as the energy storage medium, and the charging and discharging process is achieved through the chemical reactions or changes in the storage medium. Simply put, electrical energy generated from solar or wind power is stored in at least one set of chemical batteries through the chemical reactions or changes in the storage medium. When external power consumption reaches its peak, the stored energy is released through the chemical reactions or changes in the storage medium for use, or transferred to areas with power shortages.

[0080] This application provides an energy storage device 1, which may be, but is not limited to, a battery pack, a battery system, etc. The following explanation uses a battery pack as an example to illustrate the energy storage device 1.

[0081] like Figure 2 As shown, the energy storage device 1 includes a housing 200, a battery module 400, and a liquid cooling plate 600. The battery module 400 is housed within the housing 200, and the liquid cooling plate 600 is disposed within the housing 200 for cooling the battery module 400.

[0082] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0083] The housing 200 may include a top cover 210 and a bottom shell 220, which are connected together to form a cavity for accommodating the battery module 400. The shape of the top cover 210 and the bottom shell 220 when connected may be determined according to the shape of the battery module 400. For example, in the embodiments of this application, the top cover 210 and the bottom shell 220 are connected to form a hollow cuboid, but this is not a limitation.

[0084] As an example, the bottom shell 220 can be plate-shaped, and the top cover 210 is a cuboid shape with an opening. When the top cover 210 and the bottom shell 220 are fastened together, they form a closed chamber for accommodating the battery module 400.

[0085] Of course, in other embodiments, the bottom shell 220 is a cuboid shape with an opening, and the top cover 210 is plate-shaped. Alternatively, both the bottom shell 220 and the top cover 210 are cuboid shapes and each has an opening on one side, with the opening of the bottom shell 220 and the opening of the top cover 210 facing each other, and the bottom shell 220 and the top cover 210, when fastened together, form a closed cavity for accommodating the battery module 400.

[0086] The number of battery modules 400 can be one or more, where multiple means two or more, such as two, three, four, etc.

[0087] Each battery module 400 includes multiple individual battery cells 411 arranged side by side. The individual battery cells 411 can be lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc., and this application embodiment does not limit their form. The individual battery cells can be cylindrical, flat, cuboid, etc., and this application embodiment does not limit their form.

[0088] For a single cell 411, the battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The single cell 411 mainly relies on the movement of metal ions between the positive and negative electrode sheets to operate. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer, and the positive current collector without the positive active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer, and the negative current collector without the negative active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. The separator can be made of PP or PE, etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited to these.

[0089] The liquid cooling plate 600 can be disposed between the bottom surface of the battery module 400 and the bottom shell 220, or between the top surface of the battery module 400 and the top cover 210. When there are multiple battery modules 400, the liquid cooling plate 600 can also be disposed between two adjacent battery modules 400.

[0090] In another embodiment, the liquid cooling plate 600 may also be U-shaped and partially surround the outer periphery of the multiple battery modules 400.

[0091] Of course, in another embodiment, the liquid cooling plate 600 may also be integrated into the bottom shell 220 and / or the top cover 210.

[0092] like Figure 3 and Figure 4 As shown, the liquid cooling plate 600 of this embodiment includes a first cold plate 610, a second cold plate 620, a support member 630, and solder 640. The second cold plate 620 is stacked and sealed to the first cold plate 610. The support member 630 is disposed between the first cold plate 610 and the second cold plate 620, and divides the cavity formed by the first cold plate 610 and the second cold plate 620 into a first flow channel 651 and a second flow channel 652. The support member 630 has a first side 630a facing the first cold plate 610 and a second side 630b disposed opposite to the first side 630a along the thickness direction D3 of the liquid cooling plate 600. A first storage structure 661 is provided between the first side 630a and the first cold plate 610, and a second storage structure 662 is provided between the second side 630b and the second cold plate 620. The first storage structure 661 is connected to the first flow channel 651 and the second flow channel 652 respectively, and the second storage structure 662 is connected to the first flow channel 651 and the second flow channel 652 respectively. Solder 640 is bonded between the first side 630a and the first cold plate 610 and between the second side 630b and the second cold plate 620, and is accommodated in the first storage structure 661 and the second storage structure 662.

[0093] In this embodiment, a first storage structure 661 is provided between the first side 630a of the support member 630 and the first cold plate 610, and a second storage structure 662 is provided between the second side 630b of the support member 630 and the second cold plate 620. During welding, solder 640 can join between the first side 630a of the support member 630 and the first cold plate 610, and between the second side 630b of the support member 630 and the second cold plate 620, so that the support member 630 is fixedly connected to the first cold plate 610 and the second cold plate 620. Excess solder 640 can flow into the first storage structure 661 and the second storage structure 662, preventing excess solder 640 from flowing into the first flow channel 651 and the second flow channel 652 and causing flow channel blockage, which would affect the overall heat dissipation efficiency of the liquid cooling plate 600.

[0094] It should be noted that the term "sealed connection" means that after the first cold plate 610 and the second cold plate 620 are connected, coolant cannot leak from the connection point of the first cold plate 610 and the second cold plate 620. In the embodiments of this application, the first cold plate 610 and the second cold plate 620 are welded together.

[0095] In one embodiment, a first storage structure 661 is disposed on a first side 630a of the support member 630, and a second storage structure 662 is disposed on a second side 630b of the support member 630.

[0096] In this embodiment of the application, the first storage structure 661 and the second storage structure 662 are both disposed on the support member 630, and not on the first cold plate 610 and the second cold plate 620. This ensures the integrity of the structure of the first cold plate 610 and the second cold plate 620, and facilitates the processing of the first cold plate 610 and the second cold plate 620 by stamping, thereby improving processing efficiency.

[0097] Of course, in another embodiment, the first storage structure 661 is disposed on the first cold plate 610, and the second storage structure 662 is disposed on the second cold plate 620.

[0098] In another embodiment, the first storage structure 661 is disposed on the first cold plate 610, and the second storage structure 662 is disposed on the support member 630; or, the first storage structure 661 is disposed on the support member 630, and the second storage structure 662 is disposed on the second cold plate 620.

[0099] In another embodiment, the first storage structure 661 can be simultaneously provided in the support member 630 and the first cold plate 610, and the second storage structure 662 can be simultaneously provided in the support member 630 and the second cold plate 620.

[0100] Please continue reading. Figure 3 and Figure 4 The first cold plate 610 includes a first arched portion 611 and two first welded portions 612, which are respectively connected to both sides of the first arched portion 611 along the width direction D2 of the liquid-cooled plate 600. The second cold plate 620 includes a second arched portion 621 and two second welded portions 622, which are respectively connected to both sides of the second arched portion 621 along the width direction D2 of the liquid-cooled plate 600. The positions of the first arched portion 611 and the second arched portion 621 correspond, and along the thickness direction D3 of the liquid-cooled plate 600, the first arched portion 611 and the second arched portion 621 arch away from each other. The first material storage structure 661 is disposed between the first side 630a of the support member 630 and the first arched portion 611, and the second material storage structure 662 is disposed between the second side 630b of the support member 630 and the second arched portion 621; the two first welding portions 612 correspond to the positions of the two second welding portions 622 respectively, and the solder 640 is also joined between the corresponding first welding portions 612 and second welding portions 622.

[0101] In the embodiments of this application, the first cold plate 610 and the second cold plate 620 each include an arched portion and two welded portions, so that the first cold plate 610 and the second cold plate 620 both form a plate-like structure with a central protrusion. The connection between the arched portion and the welded portion can better adapt to the shape of other components in the battery pack, so as to make full use of the space in the battery pack and improve the space utilization rate.

[0102] like Figure 5 As shown, in another embodiment, one of the first cold plate 610 and the second cold plate 620 is a flat plate structure, and the other of the first cold plate 610 and the second cold plate 620 includes an arched portion and two welded portions.

[0103] In one specific embodiment, the first cold plate 610 includes a first arched portion 611 and two first welded portions 612, and the second cold plate 620 has a flat plate structure. The first cold plate 610 covers one side surface of the second cold plate 620, but is not limited thereto.

[0104] like Figure 6 and Figure 7 As shown, the structure of the first side 630a of the support member 630 is the same as that of the second side 630b, and they are symmetrically arranged in the thickness direction D3 of the liquid cooling plate 600.

[0105] Furthermore, the first storage structure 661 includes at least one first storage trough 633, and the second storage structure 662 includes at least one third storage trough 635. The support member 630 includes a body 631, a plurality of first protrusions 632, and a plurality of second protrusions 634. The body 631 has a first surface 631a facing the first cold plate 610 and a second surface 631b facing the second cold plate 620. The first surface 631a and the second surface 631b are disposed facing away from each other in the thickness direction D3 of the liquid cooling plate 600.

[0106] Multiple first protrusions 632 are protruding from the first surface 631a and arranged side by side along the length direction D1 of the liquid cooling plate 600; wherein, a first storage trough 633 is formed between each two adjacent first protrusions 632, and each first storage trough 633 is connected to the first flow channel 651 and the second flow channel 652 respectively; solder 640 is bonded between the multiple first protrusions 632 and the first cold plate 610 and is contained in the first storage trough 633.

[0107] Multiple second protrusions 634 are protruding from the second surface 631b and arranged side by side along the length direction D1 of the liquid cooling plate 600; wherein, a third storage tank 635 is formed between each two adjacent second protrusions 634, and each third storage tank 635 is connected to the first flow channel 651 and the second flow channel 652 respectively; solder 640 is bonded between the multiple second protrusions 634 and the second cold plate 620 and is contained in the third storage tank 635.

[0108] In this embodiment, the support member 630 has a plurality of first protrusions 632 protruding from its first surface 631a facing the first cold plate 610. A first storage groove 633 is formed between every two adjacent first protrusions 632. Thus, on the first surface 631a of the support member 630, a structure is formed in which the first protrusions 632 and the first storage grooves 633 are alternately arranged along the length direction D1 of the liquid cooling plate 600. On the one hand, the welding strength between the support member 630 and the first cold plate 610 is guaranteed; on the other hand, the first storage groove 633 can store excess solder 640, preventing the solder 640 from clogging the first flow channel 651 and / or the second flow channel 652.

[0109] Optionally, the body 631 has at least one sub-channel 630c inside, each sub-channel 630c extends along the length direction D1 of the liquid cooling plate 600, and each sub-channel 630c penetrates two end faces 631e of the body 631 that are arranged opposite to each other along the length direction D1 of the liquid cooling plate 600.

[0110] like Figure 3 As shown, the first cold plate 610 and the second cold plate 620 are of equal length, and the lengths of the first cold plate 610 and the second cold plate 620 are greater than the length of the support member 630. The two ends of the first cold plate 610 extend beyond the two end faces 631e of the body 631 in the length direction D1, and the two ends of the second cold plate 620 extend beyond the two end faces 631e of the body 631 in the length direction D1.

[0111] Please continue reading. Figure 6 and Figure 7 The support member 630 also includes two first end protrusions 636, which protrude from the first surface 631a; a plurality of first protrusions 632 are located between the two first end protrusions 636, and the plurality of first protrusions 632 and the two first end protrusions 636 are arranged side by side.

[0112] The two outermost first protrusions 632 of the plurality of first protrusions 632 form a second storage trough 637 between the two first end protrusions 636 respectively, and each second storage trough 637 is connected to the first flow channel 651 and the second flow channel 652 respectively; the first storage structure 661 also includes two second storage troughs 637; wherein, the solder 640 is also joined between each first end protrusion 636 and the first cold plate 610, and is also contained in the second storage trough 637.

[0113] The support member 630 also includes two second end protrusions 638, which protrude from the second surface 631b; a plurality of second protrusions 634 are located between the two second end protrusions 638, and the plurality of second protrusions 634 and the two second end protrusions 638 are arranged side by side.

[0114] The two outermost second protrusions 634 of the plurality of second protrusions 634 form a fourth storage groove 639 between the two second end protrusions 638 respectively, and each fourth storage groove 639 is connected to the first flow channel 651 and the second flow channel 652 respectively; the second storage structure 662 also includes two fourth storage grooves 639; wherein, the solder 640 is also joined between each second end protrusion 638 and the second cold plate 620, and is also contained in the fourth storage groove 639.

[0115] It should be noted that, for the sake of simplicity, the following description will only take the structure of the first side 630a of the support member 630 as an example. The structure of the second side 630b of the support member 630 can be referred to the structure of the first side 630a, and will not be repeated here.

[0116] like Figure 4 and Figure 6 As shown, the body 631 has a first side surface 631c and a second side surface 631d arranged opposite to each other along the width direction D2 of the liquid cooling plate 600. The first side surface 631c forms the inner wall surface of the first flow channel 651, and the second side surface 631d forms the inner wall surface of the second flow channel 652. The two end faces of each first protrusion 632 are flush with the first side surface 631c and the second side surface 631d, respectively.

[0117] In this embodiment, the two end faces of each first protrusion 632 are flush with the first side surface 631c and the second side surface 631d, respectively. Therefore, the first storage groove 633 formed between any two adjacent first protrusions 632 effectively penetrates the inner wall of the first flow channel 651 and the inner wall of the second flow channel 652. Thus, excess solder 640 located on the first side surface 631c of the body 631 can flow into the first storage groove 633 through one end, and excess solder 640 located on the second side surface 631d of the body 631 can flow into the first storage groove 633 through the other end, preventing excess solder 640 from accumulating on the first side surface 631c and the second side surface 631d of the body 631, thereby preventing blockage of the first flow channel 651 and the second flow channel 652.

[0118] like Figure 6 As shown, the two first end protrusions 636 have two third side surfaces 636a facing away from each other along the length direction D1 of the liquid cooling plate 600, and the two third side surfaces 636a are respectively flush with the two end faces 631e of the body 631. The length of each first end protrusion 636 is less than the distance between the first side surface 631c and the second side surface 631d.

[0119] It is understandable that, since the two ends of the first cold plate 610 extend beyond the two end faces 631e of the body 631, some solder 640 will accumulate on the end faces 631e of the body 631, and this part of solder 640 will block the sub-channels 630c inside the body 631.

[0120] In this embodiment, since the length of each first end protrusion 636 is less than the distance between the first side surface 631c and the second side surface 631d, at least one end of the first end protrusion 636 does not extend to the side surface of the body 631. In other words, at least one of the first side surface 631c and the second side surface 631d has an opening between itself and the first end protrusion 636. This opening facilitates the flow of excess solder 640 from the end face 631e of the body 631 into the second storage tank 637, preventing excess solder 640 from accumulating on the end face 631e of the body 631.

[0121] Furthermore, the orthographic projection of the first end protrusion 636 on the first surface 631a is centered on the first surface 631a along the width direction D2 of the liquid cooling plate 600. Thus, both ends of the first end protrusion 636 are provided with openings, which further facilitates the flow of excess solder 640 located on the end face 631e of the body 631 into the second storage tank 637.

[0122] like Figure 6 and Figure 8 As shown, the two first end protrusions 636 also have two fourth side surfaces 636b facing each other along the length direction D1 of the liquid cooling plate 600; each of the two ends of each first end protrusion 636 along the width direction D2 of the liquid cooling plate 600 is provided with a slope 636c, and the two slope surfaces 636c of each first end protrusion 636 are respectively connected to the two ends of the fourth side surface 636b, and extend from the fourth side surface 636b in a direction that moves away from each other and gradually approaches the third side surface 636a.

[0123] In this embodiment of the application, since the two inclined surfaces 636c of each first end protrusion 636 are respectively connected to the two ends of the fourth side surface 636b and extend from the fourth side surface 636b in a direction away from each other and gradually closer to the third side surface 636a, the slot openings at both ends of the second storage tank 637 along the width direction D2 of the liquid cooling plate 600 form an outward expansion structure to increase the flow area of ​​the second storage tank 637 at the opening, which helps excess solder 640 to flow into the second storage tank 637.

[0124] Optionally, the angle α between the inclined surface 636c and the third side surface 636a of each first end protrusion 636 is between 30 degrees and 45 degrees. For example, α is 30 degrees, 35 degrees, 40 degrees, or 45 degrees.

[0125] Please continue reading. Figure 8Each of the first end protrusions 636 is provided with an outer arc surface 636d at both ends along the width direction D2 of the liquid cooling plate 600; one end of each of the two outer arc surfaces 636d is connected to the end of each of the two inclined surfaces 636c away from the fourth side surface 636b, and the other end of each of the two outer arc surfaces 636d is connected to both ends of the third side surface 636a; each outer arc surface 636d is tangent to the inclined surface 636c and the third side surface 636a respectively.

[0126] According to capillary action, if the liquid surface is curved, it tends to flatten. Therefore, a concave liquid surface exerts a pulling force on the surrounding liquid. Specifically, in this embodiment, since the two ends of the first end protrusion 636 are also provided with outer arc surfaces 636d, the liquid surface of the solder 640 liquid attached to the outer arc surface 636d is a concave liquid surface. Thus, the concave liquid surface exerts a pulling force on the surrounding solder 640 liquid, thereby pulling the solder 640 liquid located at the end face 631e of the body 631 into the second storage tank 637.

[0127] like Figure 6 As shown, each first protrusion 632 has two fifth side surfaces 632a arranged opposite to each other along the length direction D1 of the liquid cooling plate 600. There is a first distance L1 between the two fifth side surfaces 632a facing each other in two adjacent first protrusions 632. There is a second distance L2 between the outermost fifth side surface 632a of the plurality of first protrusions 632 and the fourth side surface 636b of the corresponding first end protrusion 636. The second distance L2 is greater than the first distance L1.

[0128] In this embodiment, since the first storage tank 633 is used to store solder 640 located on the first side 631c and the second side 631d, and the second storage tank 637 is used not only to store excess solder 640 located on the first side 631c and the second side 631d, but also to store excess solder 640 located on the end face 631e of the body 631, by designing the second distance L2 to be greater than the first distance L1, the width of the second storage tank 637 can be greater than the width of the first storage tank 633, thereby achieving a larger volume of the second storage tank 637, so that the second storage tank 637 can store more solder 640, avoiding the situation where the space inside the second storage tank 637 is full and excess solder 640 cannot flow into the second storage tank 637.

[0129] It should be noted that the first storage structure 661 and the second storage structure 662 can be the same structure or different structures.

[0130] The total volume of the first storage structure 661 and the second storage structure 662 is greater than the total volume of the first flow channel 651 and the second flow channel 652, thus ensuring that excess solder 640 flows fully into the first storage structure 661 and the second storage structure 662.

[0131] like Figure 9 As shown, this application embodiment also provides an electrical device 10, which includes the energy storage device 1 and the load 11 described in the above embodiment, and the energy storage device 1 supplies power to the load 11.

[0132] Thus, for electrical equipment 10 including the aforementioned energy storage device 1, the stability of the electrical equipment operation can be improved, the probability of the electrical equipment downtime can be reduced, and the safety of the electrical equipment in use can be improved.

[0133] In one embodiment, the load 11 may include, but is not limited to, household appliances, industrial equipment, etc., wherein household appliances may include rice cookers, microwave ovens, ovens, induction cookers, etc.

[0134] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0135] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0136] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0137] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0138] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A liquid-cooled plate, characterized in that, include: First cold plate; The second cold plate is stacked and sealed together with the first cold plate; A support member is disposed between the first cold plate and the second cold plate, and divides the cavity formed by the first cold plate and the second cold plate into a first flow channel and a second flow channel. The support member has a first side facing the first cold plate and a second side disposed opposite to the first side along the thickness direction of the liquid cooling plate. A first storage structure is provided between the first side and the first cold plate, and a second storage structure is provided between the second side and the second cold plate. The first storage structure is connected to the first flow channel and the second flow channel respectively, and the second storage structure is connected to the first flow channel and the second flow channel respectively. as well as Solder is bonded between the first side and the first cold plate and between the second side and the second cold plate, and is contained within the first and second storage structures to prevent excess solder from flowing into the first and second flow channels.

2. The liquid cooling plate according to claim 1, characterized in that, The first storage structure is located on the first side of the support member, and the second storage structure is located on the second side of the support member.

3. The liquid cooling plate according to claim 2, characterized in that, The first storage structure includes at least one first storage tank; the support member includes: The body has a first surface facing the first cold plate; and Multiple first protrusions are provided on the first surface and arranged side by side along the length of the liquid cooling plate; wherein, a first storage trough is formed between every two adjacent first protrusions, and each first storage trough is connected to the first flow channel and the second flow channel respectively; The solder is bonded between the plurality of first protrusions and the first cold plate, and is contained in the first storage tank.

4. The liquid cooling plate according to claim 3, characterized in that, The body has a first side and a second side disposed opposite to each other along the width direction of the liquid cooling plate. The first side constitutes the inner wall surface of the first flow channel, and the second side constitutes the inner wall surface of the second flow channel. The two end faces of each of the first protrusions are flush with the first side face and the second side face, respectively.

5. The liquid cooling plate according to claim 3, characterized in that, The two ends of the first cold plate extend beyond the two end faces of the body, respectively; The support member further includes two first end protrusions, which protrude from the first surface; a plurality of first protrusions are located between the two first end protrusions, and the plurality of first protrusions and the two first end protrusions are arranged side by side; The two outermost first protrusions of the plurality of first protrusions respectively form a second storage trough between the two first end protrusions, and each second storage trough is connected to the first flow channel and the second flow channel respectively; the first storage structure further includes two second storage troughs; wherein, the solder is also bonded between each first end protrusion and the first cold plate, and is also contained in the second storage trough; The length of each of the first end protrusions is less than the distance between the first side and the second side.

6. The liquid cooling plate according to claim 5, characterized in that, The two first end protrusions have two third side surfaces facing away from each other along the length of the liquid cooling plate, and the two third side surfaces are respectively flush with the two end faces of the body.

7. The liquid cooling plate according to claim 6, characterized in that, The two first end protrusions also have two fourth side surfaces facing each other along the length of the liquid cooling plate; Each of the first end protrusions has a bevel at both ends along the width direction of the liquid cooling plate. The two bevels of each first end protrusion are respectively connected to the two ends of the fourth side and extend from the fourth side in a direction that moves away from each other and gradually approaches the third side.

8. The liquid cooling plate according to claim 7, characterized in that, Each of the first end protrusions also has an outer arc surface at both ends along the width direction of the liquid cooling plate; One end of each of the two outer arc surfaces is connected to one end of each of the two inclined surfaces away from the fourth side surface, and the other end of each of the two outer arc surfaces is connected to both ends of the third side surface. Each of the outer circular arc surfaces is tangent to the inclined surface and the third side surface, respectively.

9. The liquid cooling plate according to claim 7, characterized in that, The angle between the inclined surface of each of the first end protrusions and the third side surface is between 30 degrees and 45 degrees.

10. The liquid-cooled plate according to claim 5, characterized in that, The two first end protrusions have two fourth sides facing each other along the length of the liquid cooling plate; Each of the first protrusions has two fifth sides disposed opposite to each other along the length of the liquid cooling plate, and there is a first distance between the two fifth sides facing each other in two adjacent first protrusions. The outermost fifth side of the plurality of first protrusions has a second distance between it and the fourth side of the corresponding first end protrusion; The second distance is greater than the first distance.

11. The liquid-cooled plate according to any one of claims 1 to 10, characterized in that, The first cold plate includes a first arched portion and two first welded portions, the two first welded portions being respectively connected to both sides of the first arched portion along the width direction of the liquid cooling plate; The second cold plate includes a second arched portion and two second welded portions, the two second welded portions being respectively connected to both sides of the second arched portion along the width direction of the liquid cooling plate; The first arched portion and the second arched portion are positioned correspondingly, and along the thickness direction of the liquid cooling plate, the first arched portion and the second arched portion arch away from each other; the first storage structure is disposed between the first side and the first arched portion, and the second storage structure is disposed between the second side and the second arched portion; The two first welded portions correspond to the positions of the two second welded portions, and the solder is also bonded between the corresponding first welded portions and second welded portions.

12. The liquid-cooled plate according to any one of claims 1 to 10, characterized in that, The structure of the first side of the support member is the same as that of the second side, and they are symmetrically arranged in the thickness direction of the liquid cooling plate.

13. An energy storage device, characterized in that, Includes the liquid cooling plate as described in any one of claims 1 to 12.

14. An electrical appliance, characterized in that, The device includes the energy storage device of claim 13, wherein the energy storage device supplies power to the electrical equipment.

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