Cold plate, battery and electric device

Abstract

The utility model discloses a cold plate, a battery and a power utilization device, and the cold plate comprises a plate body; the flow channel wall is connected with the plate body, and a part of the flow channel wall is separated from the plate body, so that the flow channel wall is matched with the plate body to form a flow channel; the runner wall and the plate body are of an integrally-formed structure. In the embodiment of the invention, the runner wall and the plate body are integrally formed, so that the cold plate can be manufactured by multiple times of processing, and the manufacturing process of the cold plate is simplified.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a cold plate, a battery and an electrical device. Background Art

[0002] During the use of batteries and other equipment, the battery cells therein will generate a lot of heat. Therefore, it is necessary to dissipate the heat generated by the battery cells to ensure that the battery cells and other components will not get out of control or be damaged due to overheating. In some cases, in order to dissipate the heat of the battery cells, a water cooling plate is added to the battery. The water cooling plate can dissipate the heat of the battery cells, thereby ensuring the normal use of the battery. Since the commonly used water cooling plate is generally composed of an upper and lower plate, one of the plates is usually formed by stamping, casting or die-casting, and the two plates are welded to form a flow channel. However, this method is more complicated to produce and is not conducive to simplified production. Utility Model Content

[0003] The present application provides a cold plate, a battery and an electrical device, aiming to improve the problem that the cold plate is relatively complicated in manufacturing and is not conducive to simplified production.

[0004] In order to achieve the above-mentioned technical effect, a technical solution adopted in the present application is: providing a cold plate, which includes: a plate body; a flow channel wall, which is connected to the plate body and partially spaced from the plate body, thereby cooperating with the plate body to form a flow channel; the flow channel wall and the plate body are an integrally formed structure.

[0005] By forming the flow channel wall and the plate body in one piece, multiple processing steps are avoided to produce the cold plate, the production process of the cold plate is simplified, and the simplified production of the cold plate is facilitated.

[0006] In some embodiments, the flow channel includes an inlet and an outlet, each of the inlets is connected to one end of a plurality of sub-flow channels, and the other ends of the plurality of sub-flow channels are connected to one of the outlets.

[0007] A plurality of sub-channels share one inlet and outlet, which can reduce the number of the overall inlet and outlet of the cold plate, thereby making the inlet and outlet of the cold plate easier to manage and connect to the outside.

[0008] In some embodiments, the sub-channel is semicircular or arcuate in a cross section perpendicular to the plate body.

[0009] The sub-flow channel of this shape can reduce the resistance encountered by the liquid substance during its flow.

[0010] In some embodiments, the channel wall and the plate body are 3D printed structures.

[0011] 3D printing can easily realize the one-piece molding structure of the plate body and the flow channel wall.

[0012] In some embodiments, the cross-section of the flow channel wall is arched.

[0013] The arched flow channel wall can withstand greater pressure and facilitates the realization of semicircular or arcuate sub-flow channels.

[0014] In some embodiments, a plurality of the sub-flow channels are arranged in a first direction, each of the sub-flow channels is disposed along a second direction, and the first direction intersects with the second direction.

[0015] Through this arrangement, different sub-channels correspond to heat dissipation at different positions, which can increase the heat dissipation area.

[0016] In some embodiments, the channel wall of each of the sub-channels includes a plurality of first portions arranged along a third direction, and a second portion communicating with adjacent first portions, wherein the second portion is an arc-shaped structure.

[0017] By reciprocatingly arranging the sub-channels, a larger heat dissipation area can be obtained per unit length.

[0018] In some embodiments, two adjacent first portions are connected to the same position of the plate between the two first portions.

[0019] This arrangement enables the first part of the sub-channels to be closely arranged, thus achieving the best cooling effect.

[0020] In some embodiments, two adjacent first portions are spaced apart from each other.

[0021] This arrangement can provide a larger buffer between adjacent first parts in the sub-flow channels, and can make liquid or other substances in the sub-flow channels have a faster flow rate.

[0022] In some embodiments, the flow channel walls of the plurality of sub-flow channels are partially connected at the inlet, and the connection position is a gradually contracting structure in the opposite direction of the flow of the contents in the cold plate.

[0023] This structure enables liquid or other substances flowing into the inlet to flow smoothly into different sub-channels.

[0024] In some embodiments, the thickness of the plate body is smaller than the thickness of the channel wall.

[0025] This arrangement enables the channel wall to withstand greater pressure and enhances the overall force-bearing capacity of the cold plate.

[0026] The present application also provides an example of a battery, wherein the battery includes the cold plate as described in any one of the above embodiments.

[0027] By forming the flow channel wall and the plate body in one piece, multiple processing steps are avoided to produce the cold plate, the production process of the cold plate is simplified, and the simplified production of the cold plate is facilitated.

[0028] As described in any of the above examples, the battery also includes a box body and a battery cell, the box body includes a cover body and a box shell, the box shell is used to accommodate the cold plate and the battery cell, the cover body is connected to the box shell to form a accommodating space for accommodating the cold plate and the battery cell, and the cold plate is arranged at the bottom of the box shell opposite to the cover body.

[0029] The cold plate is arranged at the bottom of the box body and directly supports the battery cells, which can ensure the cooling of the battery cells without the need for other supporting components, thereby achieving lightweighting of the cold plate.

[0030] As described in any of the above examples, a side of the plate body of the cold plate away from the flow channel wall abuts against the battery cell, and a side of the flow channel wall of the cold plate away from the plate body abuts against the bottom of the box shell.

[0031] By carrying the battery cells by the plate body, the stability of the battery cells can be ensured, and the battery cells can be in contact with the largest heat dissipation surface, thereby ensuring the heat dissipation effect on the battery cells.

[0032] The present application also provides an example of an electrical device, wherein the electrical device includes a battery as described in any of the above embodiments.

[0033] Through the above method, the cold plate includes a flow channel formed by integrally forming the flow channel wall and the plate body, so that the cold plate can dissipate heat for the battery cells placed in the accommodating space, avoiding multiple processing to make the cold plate, simplifying the production process of the cold plate, facilitating the simplified production of the cold plate, and also avoiding the unreliability and instability of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a simplified schematic diagram of a vehicle according to some embodiments;

[0036] Figure 2 is an exploded view of a battery according to some embodiments;

[0037] Figure 3 is an exploded view of a battery according to some other embodiments;

[0038] Figure 4 is a front structural diagram of a battery according to some embodiments;

[0039] Figure 5 is a schematic diagram of a cross-sectional structure of a cold plate according to some embodiments;

[0040] Figure 6 for Figure 5 A schematic diagram of a local enlarged structure;

[0041] Figure 7 is a schematic diagram of the structure of a cold plate according to some embodiments;

[0042] Figure 8 is a schematic structural diagram of a cold plate according to another embodiment;

[0043] Fig. 9 is a schematic diagram of a top view of a cold plate according to some embodiments;

[0044] Fig.10 for Fig. 9 Schematic diagram of the local enlarged structure in.

[0045] Marking Description:

[0046] Vehicle 1, battery 10, battery cell 20, controller 30, motor 40;

[0047] Box body 11, cover body 111, box shell 112, bottom plate 112a, electrical cavity 11a, current collecting component 12, support beam 114, housing 21, bare battery cell 22;

[0048] Cold plate 50 , plate body 51 , flow channel wall 52 , flow channel 501 , inlet 5011 , outlet 5012 , first portion 521 , second portion 522 , tapered structure 511 . DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0051] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0052] The multiple terms in the examples of this application refer to at least two (including two).

[0053] As mentioned above, it should be emphasized that when the term "includes / comprising" is used in this specification, it is used to clearly indicate the presence of the features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components. As used in this application, the singular forms "a", "an" and "the" also include plural forms, unless the context clearly indicates otherwise.

[0054] The words "a" and "an" in this specification may mean one, but may also be consistent with the meaning of "at least one" or "one or more". The term "about" generally means plus or minus 10% of the mentioned value, or more specifically plus or minus 5%. The term "or" used in the claims means "and / or" unless it is clearly stated that it refers to only alternative solutions.

[0055] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0056] The battery mentioned in the embodiments disclosed in this application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc. The battery cell is the basic unit in the battery, and can generally be divided into: cylindrical battery cells, square battery cells and soft-pack battery cells according to the packaging method. The following will mainly focus on square battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells in some aspects.

[0057] A battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. Lithium-ion battery cells mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. For example, a lithium-ion battery cell uses an embedded lithium compound as an electrode material. The main common positive electrode materials currently used as lithium-ion batteries are: lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), lithium nickel oxide (LiNiO2) and lithium iron phosphate (LiFePO4). The separator is arranged between the positive electrode sheet and the negative electrode sheet to form a thin film structure with three layers of material. The thin film structure is generally made into an electrode assembly with a desired shape by winding or stacking. For example, the thin film structure of the three layers of material in the cylindrical battery cell is wound into a cylindrical electrode assembly, while the thin film structure in the square battery cell is wound or stacked into an electrode assembly with a roughly rectangular shape.

[0058] Multiple battery cells can be connected in series and / or in parallel via electrode terminals for various applications. In some high-power applications such as electric vehicles, the application of batteries includes three levels: battery cells, battery modules and batteries. The battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery is the final state of the battery system installed in the electric vehicle. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells. The box generally consists of a cover and a box shell, and the box shell generally includes a bottom plate and an outer plate. The outer plate extends from the edge of the bottom plate, generally perpendicular to the bottom plate, and the bottom plate and the outer plate form a containing space with an opening for accommodating battery cells or battery modules. The cover covers the opening of the containing space, is arranged opposite to the bottom plate, and is connected to the outer plate. The box shell and the cover can be detachably connected or sealed. Most of the current batteries are made by assembling various control and protection systems such as battery management systems (BMS) and thermal management components on one or more battery modules. With the development of technology, the battery module level can be omitted, that is, the battery is directly formed by battery cells. Multiple battery cells connected together are called battery modules. This improvement has increased the weight energy density and volume energy density of the battery system while significantly reducing the number of components. The batteries mentioned in this application include battery modules or batteries.

[0059] In some cases, a battery cell includes a shell and two bare cells, and the two bare cells are arranged in the accommodating space of the shell. Since two bare cells are arranged in the shell, it is necessary to equalize the temperature or transfer heat to the two bare cells. Therefore, a temperature equalizing structure or a heat conducting device is usually provided in the shell. The temperature equalizing structure or the heat conducting device will be arranged close to the two bare cells. However, the existing temperature equalizing structure or heat conducting device can only equalize or conduct the heat generated by the two bare cells, and when the heat of the two bare cells is too high, it may cause spontaneous combustion of the bare cells, thereby causing the battery cell to burn or be damaged, and there is a safety hazard.

[0060] In order to solve the problem that the battery cells of two bare cells are prone to spontaneous combustion, which leads to damage to the battery cells and potential safety hazards, it can be noted that the main reason is that the temperature equalization structure or the heat-conducting device can only balance or conduct the heat generated by the two bare cells, but cannot prevent combustion. Therefore, the combustion of the bare cells can be prevented by flame-retardant treatment of the temperature equalization device or the heat-conducting device. For example, a flame retardant can be added to the temperature equalization device or the heat-conducting device to prevent the combustion of the bare cells. Therefore, the heat-conducting device can be configured to include a first heat-conducting member, a second heat-conducting member and a flame retardant, the first heat-conducting member is connected to the second heat-conducting member, and an angle is formed between the first heat-conducting member and the second heat-conducting member; the flame retardant is arranged in the angle. In this way, the flame retardant can prevent the combustion of the bare cells, so that the battery cells are not prone to spontaneous combustion, and the safety effect of using bare cells and battery cells is improved.

[0061] Based on the above considerations, in order to solve the problem that the battery cells of two bare cells are prone to spontaneous combustion, thereby causing damage to the battery cells and posing a safety hazard, a heat conduction device, a battery cell, a battery and an electrical device are designed.

[0062] For example, Figure 1 As shown, this figure is a simple schematic diagram of a vehicle 1 in which an electrical device according to some embodiments is used. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 10 may be provided inside the vehicle 1, for example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1. And the vehicle 1 may also include a controller 30 and a motor 40. The controller 30 is used to control the battery 10 to power the motor 40, for example, for the working power demand of the vehicle 1 during starting, navigation and driving. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1. The battery 10 referred to hereinafter may also be understood as a battery including a plurality of battery cells 20.

[0063] Figure 2 and Figure 3 1 and 2 show exploded views of a battery 10 according to some embodiments. Figure 2 and Figure 3 As shown, the battery 10 includes a plurality of battery cells 20 and a busbar 12 for electrically connecting the plurality of battery cells 20. In order to protect the battery cells 20 from being invaded or corroded by external liquids or foreign objects, the battery 10 includes a housing 11, which is used to encapsulate the plurality of battery cells and other necessary components, such as Figure 2 and Figure 3 As shown. In some embodiments, the box body 11 may include a cover 111 and a box shell 112, and the battery 10 may further include a support beam 114 extending between the cover 111 and the box shell 112, and the support beam 114 may extend from the bottom plate 112a of the box shell 112 toward the cover 111 in a direction perpendicular to the bottom plate 112a. The cover 111 and the box shell 112 are sealed together to jointly surround and form an electrical cavity 11a for accommodating a plurality of battery cells 20. In some other embodiments, the cover 111 and the box shell 112 may also be combined with each other without being sealed.

[0064] This application also provides an example of a front view of a battery 10. Please refer to Figure 4 , Figure 4 FIG. 1 is a front view of a battery 10 according to some embodiments. Figure 4 As shown, the battery 10 further includes a box body 11 and a battery cell 20. The box body 11 includes a cover 111 and a box shell 112. The box shell 112 is used to accommodate the cold plate 50 and the battery cell 20. The cold plate 50 is arranged at the bottom of the box shell 112 opposite to the cover 111. The cold plate 50 includes a flow channel 501 formed by a flow channel wall 52 and a plate body 51, please refer to the following Figures 5 to 10 As shown further.

[0065] In some examples, the cold plate 50 is located at the bottom of the box 11, and is used to place and carry the battery cell 20. In this example, the cold plate 50 is set at the bottom of the box and directly carries the battery cell 20, which can ensure that the battery cell 20 is cooled without other supporting components, thereby achieving lightweight cold plate 50. In some specific examples, the side of the plate body 51 of the cold plate 50 away from the flow channel wall 52 abuts against the battery cell 20, and the side of the flow channel wall 52 of the cold plate 50 away from the plate body 51 abuts against the bottom of the box shell 112.

[0066] Here, the term "contacting" means contacting but not connected. In this example, the plate 51 is disposed in contact with the battery cell 20, and the flow channel wall 52 is disposed away from the battery cell 20. In other examples, the flow channel wall 52 is disposed close to the battery cell 20 and in contact with the battery cell 20, and the plate 51 is disposed away from the battery 20, so that the fluid in the flow channel wall 52 is in charging contact with the battery cell 20.

[0067] In this example, the plate 51 is a plane, which can well support the battery cell 20, ensuring the stability of the placement of the battery cell 20, thereby ensuring the stability of the battery cell 20. At the same time, since the plate 51 is a part of the flow channel 501, the plate 51 is in full contact with the battery cell 20, and the battery cell 20 is also in full contact with the flow channel 501, thereby ensuring that the battery cell 20 contacts the largest heat dissipation surface, thereby ensuring the heat dissipation effect of the battery cell 20.

[0068] See also Figures 5 to 10 , Figure 5 is a schematic diagram of a cross-sectional structure of a cold plate 50 according to some embodiments. Figure 6 FIG. 5 is a schematic diagram of a partially enlarged structure of a cold plate 50 according to some embodiments. Figure 7 is a schematic diagram of the structure of a cold plate 50 according to some embodiments. Figure 8 FIG. 5 is a schematic structural diagram of a cold plate 50 according to another embodiment. Fig. 9 FIG. 5 is a schematic top view of a cold plate 50 according to some embodiments. Fig.10 The figure is a partially enlarged structural diagram of a cold plate 50 according to some embodiments. The cold plate 50 in the example of the present application is arranged at the bottom of the battery cell 20, and a flow channel 501 is formed on the cold plate 50, through which the liquid flowing in the flow channel 501 circulates, thereby realizing rapid heat dissipation of the battery cell 20, ensuring that the battery and other components will not be out of control or damaged due to overheating.

[0069] The cold plate 50 includes a plate body 51 and a flow channel wall 52. The flow channel wall 52 is connected to the plate body 51 and is partially spaced from the plate body 51, so as to cooperate with the plate body 51 to form a flow channel. In the example of the present application, the flow channel wall 52 and the plate body 51 are an integrally formed structure, thereby avoiding multiple processing to make the cold plate, simplifying the production process of the cold plate, and facilitating the simplified production of the cold plate. In addition, the unreliability and instability of welding are also avoided.

[0070] in, Figure 6 for Figure 5 The cold plate 50 includes a plate body 51 and a flow channel wall 52; the flow channel wall 52 is connected to the plate body 51 and is partially spaced from the plate body 51, thereby forming a flow channel 501 with the plate body 51. In the example of the present application, the flow channel wall 52 and the plate body 51 are an integrally formed structure.

[0071] The plate body 51 is the main structure of the cold plate 50, and the flow channel wall 52 is the branch structure of the cold plate 50. The flow channel wall 52 is formed on the plate body 51, and part of the flow channel wall 52 is spaced apart from the plate body 51. Specifically, both sides of the flow channel wall 52 are connected to the plate body 51, and the middle part of the flow channel wall 52 is spaced apart from the plate body 51, so that the flow channel wall 52 and the plate body 51 form an accommodating cavity, which is the flow channel 501, so that water can flow through the flow channel.

[0072] The plate 51 is preferably a horizontal plane, which can be used to support and place some battery components. The plate 51 is preferably made of metal. Since metal has good thermal conductivity, the heat of the components that are in direct or indirect contact with the plate 51 can be transferred to the flow channel formed by the plate 51 and the flow channel wall 52, and the heat is transferred out through the fluid (such as water, etc.) in the flow channel 501.

[0073] In the example of the present application, the flow channel wall 52 and the plate body 51 are integrally formed, thereby avoiding multiple processing to form the cold plate 50 , simplifying the manufacturing process of the cold plate 50 , and facilitating the simplified production of the cold plate 50 .

[0074] In some examples, the flow channel 501 includes an inlet 5011 and an outlet 5012, which can be referred to as Figures 7 to 10 Each of the inlets 5011 is connected to one end of the plurality of sub-channels 501 , and the other end of the plurality of sub-channels 501 is connected to one of the outlets 5012 .

[0075] Wherein, the flow channel 501 includes a plurality of sub-flow channels 501, and the sub-flow channels 501 are evenly distributed on the entire plate body 51 to form a flow channel. In a specific embodiment, the fluid may be water, the inlet 5011 is specifically a water inlet, and the outlet 5012 is specifically a water outlet. In other embodiments, the fluid may also be other liquids, which are not limited here. In some specific embodiments, each sub-flow channel 501 may be connected to an inlet 5011 and an outlet 5012 respectively, so that each sub-flow channel 501 flows different fluids respectively. In other specific embodiments, a plurality of sub-flow channels 501 are interconnected to form the entire flow channel 501, and a plurality of sub-flow channels 501 share an inlet 5011 and an outlet 5012.

[0076] In this embodiment, multiple sub-channels 501 share one inlet 5011 and one outlet 5012, which can reduce the number of the entire inlet 5011 and outlet 5012 of the cold plate 50, thereby making the inlet 5011 and outlet 5012 of the cold plate 50 easier to manage and connect to the outside.

[0077] In some examples, the sub-channel 501 is semicircular or arcuate in a cross section perpendicular to the plate body 51 .

[0078] When the plate 51 is placed horizontally (or transversely), the cross section of the sub-channel 501 refers to the cross section in the vertical (longitudinal) direction. Figure 6 A schematic diagram of a partially enlarged structure in . Among them, a figure composed of a chord and its corresponding arc is called a bow. The channel wall 52 forms the arc of the bow-shaped sub-channel 501, and the plate body 51 forms the chord of the bow-shaped sub-channel 501. Alternatively, the channel wall 52 forms a semicircular arc of the semicircular sub-channel 501, and the plate body 51 forms the diameter of the semicircular sub-channel 501. Among them, the difference between a semicircle and a bow is whether the connection between the arc-shaped channel wall 52 and the plate body 51 is perpendicular. If the channel wall 52 is connected perpendicularly to the plate body 51, a semicircular sub-channel 501 is formed. If the channel wall 52 is not perpendicularly connected to the plate body 51 (that is, a cosine connection), an arched sub-channel 501 is formed.

[0079] Specifically, the channel wall 52 of the semicircular or arcuate sub-channel 501 has fewer corners in the water flow direction, which can reduce the resistance encountered by liquid substances (such as water) during flow, and can also reduce the wear of the channel wall 52 in the water flow direction.

[0080] In some examples, the channel wall 52 and the plate body 51 are 3D printed structures.

[0081] Among them, 3D printing technology is to build objects by stacking materials layer by layer through computer-generated three-dimensional models. Compared with traditional industrial manufacturing, 3D printing does not require molds or large production lines.

[0082] In this embodiment, the 3D printing can conveniently realize the integrated structure of the plate body 51 and the flow channel wall 52. Compared with other non-integrated structures, the integrated structure can simplify the manufacturing process of the cold plate, which is conducive to the simplified production of the cold plate.

[0083] In some embodiments, the cross section of the flow channel wall 52 is arched.

[0084] Please refer to Figure 6 As shown, the cross section refers to the cross section perpendicular to the plane direction of the plate body 51. Among them, the two ends of the flow channel wall 52 are fixedly connected to the plate body 51, the middle part of the sub-flow channel 501 is spaced apart from the plate body 51, and at the farthest position from the plate body 51, the distance between the sub-flow channel 501 and the plate body 51 gradually increases from the two ends to the middle part. The two ends of the flow channel wall 52 are fixedly connected to the plate body 51, the middle part of the sub-flow channel 501 is spaced apart from the plate body 51, and at the farthest position from the plate body 51, the distance between the sub-flow channel 501 and the plate body 51 gradually increases from the two ends to the middle part. The plate body 51 is a plane at the position corresponding to the sub-flow channel 501, and the flow channel wall 52 and the plate body 51 form a semicircular sub-flow channel 501. In some embodiments, the arch includes a curved surface and an inclined surface, the two ends of the flow channel wall 52 are inclined surfaces, intersecting with the plate body 51, and the middle part of the flow channel wall 52 is a curved surface. If the arched inclined surface intersects the plate body 51 perpendicularly, the flow channel wall 52 and the plate body 51 form a semicircular flow channel. If the arched inclined surface intersects the plate body 51 obliquely, the flow channel wall 52 and the plate body 51 form an arcuate flow channel 501. The flow channel wall 52 forms the arcuate portion of the arcuate flow channel 501, and the plate body 51 forms the chord portion of the arcuate flow channel 501.

[0085] In this embodiment, the arched flow channel 52 can withstand greater pressure and facilitates the realization of a semicircular or arcuate sub-flow channel 501.

[0086] In some examples, a plurality of sub-channels 501 are arranged in a first direction, each sub-channel 501 is disposed along a second direction, and the first direction intersects the second direction.

[0087] Please refer to Figure 7-Figure 9The first direction and the second direction may intersect each other perpendicularly or at an angle. The first direction and the second direction are on the same plane, specifically, they may be two directions of the plane of the plate 51. In one embodiment, the first direction is horizontal, and the second direction is vertical.

[0088] In this embodiment, by arranging a plurality of sub-channels 501 along the first direction and arranging each sub-channel 501 along the second direction, different sub-channels 501 can dissipate heat at different positions, thereby increasing the heat dissipation area.

[0089] In some examples, the channel wall 52 of each sub-channel 501 includes a plurality of first portions 521 arranged along the third direction, and a second portion 522 communicating with adjacent first portions 521 , and the second portion 522 is an arc-shaped structure.

[0090] Please refer to Figure 5 As shown, the third direction intersects with the plane formed by the first direction and the second direction. Specifically, the third direction may be a direction perpendicular to the plane of the plate body 51. The first portion 521 of the flow channel wall 52 intersects and connects with the plate body 51. The second portion 522 is spaced apart from the plate body 51.

[0091] In this embodiment, the reciprocating sub-channels can correspond to a larger heat dissipation area per unit length.

[0092] In some examples, the first portions 521 of two adjacent sub-channels 501 are connected to the same position of the plate 51 between the first portions 521 of the two sub-channels 501 .

[0093] Please refer to Figure 7 As shown, the channel walls 52 of two adjacent sub-channels 501 are tightly connected.

[0094] In this embodiment, this arrangement allows the first portion of the sub-channels 501 to be closely arranged, so that two adjacent sub-channels 501 are separated by a channel wall, thereby increasing the arrangement space of the sub-channels 501 and achieving the best cooling effect.

[0095] In some examples, two adjacent first portions 521 are spaced apart from each other.

[0096] Please refer to Figure 8 As shown, the first parts 521 of the flow channel walls 52 of two adjacent sub-flow channels 501 are arranged at different positions of the plate body 51 at intervals. That is, the flow channel walls 52 of two adjacent sub-flow channels 501 are arranged at intervals.

[0097] In this embodiment, this arrangement can provide a larger buffer between adjacent first portions in the sub-channels, and can allow liquid or other substances in the sub-channels to have a faster flow rate.

[0098] In some examples, the channel walls 52 of the plurality of sub-channels 501 are partially connected at the inlet 5011 , and the connection position is a tapered structure 511 in the opposite direction of the flow of the contents in the cold plate 50 .

[0099] For details, please refer to Fig.10 , Fig.10 for Fig. 9 The partial enlarged view of the dotted line portion. The sub-channel located near the inlet 5011 is partially connected to the sub-channel 501 located far from the inlet 5011 (such as Fig. 9 The flow direction of the contents in the cold plate 50 refers to the flow direction of the fluid, that is, the direction of the liquid inlet shown by the arrow, and the reverse direction refers to the direction away from the flow of the fluid, forming a counter-flow with the fluid and diverting the fluid. Among them, the side of the gradually contracting structure 511 close to the inlet 5011 is a pointed tip.

[0100] In this embodiment, the tapered structure 511 can well divert the liquid at the liquid inlet, so that the liquid or other substances flowing into the inlet can flow smoothly into different sub-channels.

[0101] In some embodiments, the thickness of the plate 51 is smaller than the thickness of the channel wall 52 .

[0102] Since the channel wall 52 is arc-shaped, the contact area between the channel wall 52 and the fluid is larger, forming the main part of the channel 501 , so that the channel wall 52 is impacted more by the fluid than the plate body 51 .

[0103] In this embodiment, by making the thickness of the flow channel wall 52 greater than the thickness of the plate body 51 , the flow channel wall 52 can withstand greater pressure and impact force of the fluid, thereby enhancing the overall force bearing capacity of the cold plate 50 .

[0104] In some specific application scenarios, the battery monomer of two bare cells is prone to spontaneous combustion, which may cause damage to the battery monomer and pose a safety hazard. The battery monomer 20 of the present application includes two bare cells 22, a shell 21 and a cold plate 50. The bare cells 22 and the cold plate 50 are arranged in the shell 21. The cold plate 50 includes a plate body 51 and a flow channel wall 52; the flow channel wall 52 is connected to the plate body 51 and is partially spaced from the plate body 51, thereby forming a flow channel 501 with the plate body 51. The fluid in the flow channel 501 can dissipate heat from the battery monomer 20, which can prevent the occurrence of natural phenomena of the bare cells in the battery monomer 20 and prevent them from burning, thereby making the battery monomer 20 less likely to spontaneously combust and improving safety effects. At the same time, the flow channel wall 52 and the plate body 51 in the cold plate 50 are integrally formed by 3D printing, thereby avoiding multiple processing to make the cold plate 50, simplifying the production process of the cold plate 50, and facilitating the simplified production of the cold plate 50. At the same time, the multiple sub-channels are separated only by partitions with arched cross-sections, so that the plate body 51 of the cold plate 50 contacts the battery cell 20, thereby improving the stress condition of the cold plate 50. The multiple sub-channels 501 are tightly connected, thereby increasing the density of the channel 501 and achieving lightweight cold plate.

[0105] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A cold plate, characterized in that: The cold plate comprises: plate body; a flow channel wall, the flow channel wall being connected to the plate body and partially spaced from the plate body, thereby cooperating with the plate body to form a flow channel; The flow channel wall and the plate body are an integrally formed structure.

2. The cold plate according to claim 1, characterized in that The flow channel includes an inlet and an outlet, each of the inlets is connected to one end of a plurality of sub-flow channels, and the other ends of the plurality of sub-flow channels are connected to one of the outlets.

3. The cold plate according to claim 2, characterized in that The sub-flow channel is semicircular or arcuate in a cross section perpendicular to the plate body.

4. The cold plate according to claim 3, characterized in that The flow channel wall and the plate body are 3D printed structures.

5. The cold plate according to any one of claims 2 to 4, characterized in that The cross section of the flow channel wall is arched.

6. The cold plate according to claim 5, characterized in that A plurality of the sub-flow channels are arranged in a first direction, each of the sub-flow channels is arranged along a second direction, and the first direction intersects with the second direction.

7. The cold plate according to claim 6, characterized in that The channel wall of each of the sub-channels includes a plurality of first portions arranged along a third direction, and a second portion communicating with adjacent first portions, wherein the second portion is an arc-shaped structure.

8. The cold plate according to claim 7, characterized in that Two adjacent first parts are connected to the same position of the plate body between the two first parts.

9. The cold plate according to claim 7, characterized in that Two adjacent first parts are arranged at an interval.

10. The cold plate according to any one of claims 6 to 9, characterized in that The flow channel walls of the plurality of sub-flow channels are partially connected at the inlet, and the connection position is a gradually contracting structure along the opposite direction of the flow of the contents in the cold plate.

11. The cold plate according to claim 10, characterized in that The thickness of the plate body is smaller than the thickness of the flow channel wall.

12. A battery, characterized in that: The battery comprises a cold plate as claimed in any one of claims 1-10.

13. The battery according to claim 12, characterized in that The battery also includes a box body and a battery cell. The box body includes a cover body and a box shell. The box shell is used to accommodate the cold plate and the battery cell. The cover body is connected to the box shell to form an accommodating space for accommodating the cold plate and the battery cell. The cold plate is arranged at the bottom of the box shell opposite to the cover body.

14. The battery according to claim 13, characterized in that A side of the plate body of the cold plate away from the flow channel wall abuts against the battery cell, and a side of the flow channel wall of the cold plate away from the plate body abuts against the bottom of the box shell.

15. An electrical device, characterized in that: The electrical device comprises a battery as claimed in any one of claims 12 to 14.

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