Thermal management assembly, battery and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a thermal management assembly, a battery and an electric device. The heat management assembly comprises at least two straight pipes and at least one bent pipe. Each bent pipe is connected with two adjacent straight pipes, and each bent pipe comprises a bent angle. Wherein at least one bending angle is larger than 180 degrees. According to the heat management assembly provided by the embodiment of the invention, the bending angles larger than 180 degrees are arranged, so that the straight pipes connected by the bending pipes are arranged more tightly, and the pipelines are arranged more densely in the same area. The heat exchange contact area between the heat management assembly and the box body or the battery is increased, and the heat exchange efficiency of the heat management assembly is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and more specifically, relates to a thermal management component, a battery, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the process of charging and discharging, the internal structure of the battery will cause temperature fluctuations due to the charging and discharging of the battery itself, thus affecting the battery's performance. Therefore, it is often necessary to install a thermal management component inside the battery to measure and manage the temperature. However, the current thermal management component has poor ability to manage the temperature of the battery, which results in the battery temperature being unable to be reduced or increased to the normal operating temperature range in a timely manner, causing the battery temperature to be too high or too low, affecting normal operation, and further affecting the use of the vehicle. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a thermal management component, a battery, and an electrical device. The thermal management component reduces the area between two straight tubes connected by the bent tube by setting the bending angle of the bent tube, thereby effectively improving the pipe arrangement density of the thermal management component, making full use of the effective space in the battery, and improving the thermal management effect of the battery. Specifically, the present application includes the following technical solutions.

[0005] On the one hand, the embodiment of the present application discloses a thermal management component, which includes at least two straight tubes and at least one bent tube. Each bent tube connects two adjacent straight tubes, and the bent tube includes a bending angle. Among them, at least one bending angle is greater than 180 degrees.

[0006] By setting a bending angle greater than 180 degrees, the pipe arrangement density within the same area is increased, thereby improving the heat exchange efficiency between the thermal management component and the box or battery.

[0007] In some embodiments, the thermal management assembly includes at least one thermal management component, each thermal management component including a plurality of straight tubes and bent tubes forming a complete fluid circulation.

[0008] At least one thermal management component is provided, and the gap space between adjacent straight pipes is reduced by reasonable close arrangement, so that the pipe arrangement of the thermal management component within the same area is more dense.

[0009] In some embodiments, the thermal management component further includes a water inlet and a water outlet. The water inlet and water outlet of at least one thermal management component that forms a complete fluid cycle are distributed on the same side or different sides of the thermal management component, and / or the water inlets and water outlets of different thermal management components are distributed on the same side or different sides of the thermal management component.

[0010] By distributing the water inlets and outlets of all thermal management components under the thermal management assembly on the same side of the thermal management assembly, it is beneficial to improve the internal space utilization of the battery and increase the battery energy density. By distributing the water inlets and outlets of two thermal management components on the same side of the thermal management components, and distributing the water inlet and outlet of the same thermal management component on the same side of the thermal management component, it is beneficial to adjust the different fluid flow rates in different thermal management components to meet the different heat exchange requirements of the battery. By distributing the water inlet and outlet of the same thermal management component on different sides, the thermal management component can achieve the effect of uniform heat exchange while reducing the long reflux straight pipe, which helps to reduce the manufacturing cost of the thermal management component.

[0011] In some embodiments, the thermal management component further includes at least one straight through pipe, which is arranged to extend from the far end of the straight pipe and the bent pipe arrangement to the water inlet or outlet of the thermal management component.

[0012] By setting a straight-through pipe, the water inlet and the water outlet are set on the same side of the thermal management component. The water inlet and the water outlet only occupy the space on one side of the thermal management component, thereby improving the overall space utilization of the battery.

[0013] In some embodiments, the thermal management assembly includes two thermal management components, the straight tubes and the bent tubes of the two thermal management components are arranged in close contact, and the straight tubes of the two thermal management components extend along the outer sides of the bent tubes respectively.

[0014] By arranging two thermal management components in a nearly symmetrical manner, one thermal management component effectively utilizes the unused area of ​​the other thermal management component, making the pipeline arrangement more dense within the same area, which is beneficial to increasing the heat exchange contact area between the thermal management component and the battery or the box, thereby improving the heat exchange efficiency of the thermal management component.

[0015] In some embodiments, the flow directions of the fluids in the two thermal management components are arranged to flow in opposite directions.

[0016] By setting the flow directions of the fluids in the two thermal management components to be opposite, any section of the closely fitting parts of the two thermal management components can have a uniform temperature outward, so that the battery or the box can be heat exchanged at a uniform temperature.

[0017] In some embodiments, the bent tube and the straight tube of the thermal management assembly include at least one flat surface.

[0018] By arranging the bent tube and the straight tube to include at least one flat plane, the heat management component and the heat managed component are in planar contact, thereby increasing the contact area between the two and improving the heat exchange efficiency between the two.

[0019] In some embodiments, the bend angle is greater than 180 degrees and less than 210 degrees.

[0020] By setting a more reasonable bending angle, the pipe arrangement density within the same area is increased, thereby improving the heat exchange efficiency of the thermal management component to the battery.

[0021] In another aspect, an embodiment of the present application further provides a battery, wherein the battery comprises a thermal management component and a housing, wherein the thermal management component is located outside the housing.

[0022] By placing the thermal management component outside the box, the heat is transferred from the battery to the outer wall of the box and then to the thermal management component. Because the outer surface of the box is flat and has no gaps, it is conducive to uniform heat exchange of the internal battery cells.

[0023] In some embodiments, the thermal management component is located at the bottom of the box, and the outer side of the thermal management component is covered with a buffer layer.

[0024] It helps the buffer layer and the box to form a closed space to accommodate the thermal management components. The buffer layer protects the thermal management components from direct collision, allowing the internal thermal management components to effectively dissipate heat to the bottom of the box and the battery cells inside the box.

[0025] In some embodiments, the bent tube and the straight tube of the thermal management assembly have a flat surface facing the box.

[0026] The straight tubes and bent tubes of the thermal management component are in flat contact with the box body, which has a larger contact area than curved contact, effectively improving the heat exchange efficiency of the thermal management component to the box body and internal batteries.

[0027] On the other hand, an embodiment of the present application further provides an electrical device, and a battery is used to provide electrical energy to the electrical device.

[0028] By using the battery in the present application, it helps to improve the thermal management capability of the battery and thus improve the battery life, thereby improving the battery life performance of the electrical device.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 A schematic diagram of the structure of an electric device in some embodiments of the present application;

[0032] Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0033] Figure 3 A schematic diagram of the structure of a thermal management component in some embodiments of the present application;

[0034] Figure 4 for Figure 3 A partial enlarged view of part I;

[0035] Figure 5 A schematic diagram of the structure of another thermal management component according to some embodiments of the present application;

[0036] Figure 6 A schematic diagram of the structure of another thermal management component according to some embodiments of the present application;

[0037] Figure 7 for Figure 2 The battery shown is a partial cross-sectional view in the AA direction;

[0038] Figure 8 This is a schematic diagram of the three-dimensional structure of the thermal management component of some embodiments of the present application.

[0039] Description of reference numerals:

[0040] Electric device 1, battery 2, controller 3, motor 4;

[0041] Box body 21, battery cell 22, thermal management component 23, buffer layer 24;

[0042] A first portion 211, a second portion 212; a thermal management component 231;

[0043] Straight pipe 2311, bent pipe 2312, bending angle 2313, water inlet 2314, water outlet 2315, straight pipe 2316;

[0044] Tangent 2313a, endpoint 2313b, perpendicular line 2313c. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0054] As the battery's charge and discharge cycle progresses, the battery temperature will be too high or too low, which will cause irreversible damage to the battery. Therefore, a thermal management component is needed to manage the battery temperature. The thermal management component exchanges heat with the battery to dissipate or heat the battery to achieve the appropriate battery operating temperature and maximize battery performance.

[0055] The thermal management component includes a fluid pipeline, and heat exchange with the battery is achieved through the flow of fluid in the fluid pipeline. The more fluid pipelines that the battery surface is in contact with, the more battery heat is taken away by the fluid in the pipeline in the same period of time, and the higher the efficiency of heat exchange. Generally, thermal management components often perform thermal management on one surface or two opposite surfaces of the battery due to space utilization reasons. Therefore, how to increase the area of ​​the fluid pipeline that can be contacted with the same battery surface area has become one of the research topics for improving the heat exchange efficiency of the thermal management component to the battery.

[0056] However, due to the limitation of pipeline size, a straight fluid pipeline is generally not used to cover the entire surface of a battery, so the pipeline needs to be bent to increase the density of pipeline arrangement within a certain area. Generally, the pipeline is bent 180 degrees to form a parallel arrangement structure for reciprocating fluid flow. However, when the pipeline bending angle is 180 degrees, there is a large gap between the two adjacent parallel straight pipes connected by the bent pipe, which makes the arrangement of fluid pipelines under the battery surface of the same area less.

[0057] In order to further increase the density of fluid pipe arrangement under the battery surface of the same area, the embodiment of the present application reduces the gap space between pipes at the same bending radius by bending the pipes of the thermal management component more than 180 degrees, thereby increasing the pipe arrangement density of the thermal management component within the same area, improving the heat exchange efficiency of the thermal management component to the battery, and facilitating the management of the battery temperature so that it can work in a suitable temperature environment.

[0058] The thermal management component disclosed in the embodiments of the present application can be used in batteries or other systems that require necessary temperature regulation.

[0059] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0060] For the convenience of description, the following embodiments are described by taking an electrical device 1 according to an embodiment of the present application as an example.

[0061] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the electric device 1 of some embodiments of the present application. The electric device 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The battery 2 can not only be used as an operating power source for the electric device 1, but also as a driving power source for the electric device 1, replacing or partially replacing fuel or natural gas to provide driving power for the electric device 1. When the battery 2 is used as a driving power source, the battery 2 can be arranged at the bottom, head or tail of the electric device 1. The controller 3 is used to control the battery 2 to supply power to the motor 4, and the motor 4 is used to drive the wheels.

[0062] Please refer to Figure 2 , Figure 2 The schematic diagram of the exploded structure of the battery 2 according to some embodiments of the present application is as follows. The battery 2 includes a housing 21 , a battery cell 22 and a thermal management component 23 .

[0063] Among them, the box body 21 is used to provide a storage space for the battery cell 22 and other components, and the box body 21 can adopt a variety of structures. In some embodiments, the box body 21 may include a first part 211 and a second part 212, and the first part 211 and the second part 212 cover each other, and the first part 211 and the second part 212 jointly define a storage space. Optionally, the first part 211 and the second part 212 can be hollow structures with one side open, and the open side of the first part 211 covers the open side of the second part 212. Optionally, the second part 212 can also be a hollow structure with one end open, and the first part 211 can be a plate-like structure, and the first part 211 covers the open side of the second part 212. The box body 21 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0064] There can be multiple battery cells 22, and multiple battery cells 22 can be connected in series, in parallel, or in series and parallel in the box 21 to form a battery 2 with a certain capacity and voltage. Multiple battery cells 22 can be directly connected in series, in parallel, or in series and parallel, and then the whole formed by multiple battery cells 22 is accommodated in the box 21.

[0065] The thermal management component 23 can be directly arranged outside the box 21 to perform heat exchange with the box 21, and then perform heat exchange with the battery cell 22 through the box 21. The thermal management component 23 can also be arranged inside the box 21 to directly perform heat exchange with the battery cell 22. When the thermal management component 23 is arranged inside the box 21, it can be arranged at the top of the battery cell 22, between the battery cells 22, between the battery cell 22 and the side wall of the box 21, or at the bottom of the battery cell 22 to adjust the temperature of the battery 2.

[0066] The present application embodiment discloses a thermal management component 23, see Figure 3 The thermal management component 23 includes at least two straight tubes 2311 and at least one bent tube 2312. Each bent tube 2312 connects two adjacent straight tubes 2311, and the bent tube 2312 includes a bending angle 2313. At least one bending angle 2313 is greater than 180 degrees.

[0067] The thermal management component 23 may be a component that adjusts the temperature of the housing 21 or the battery cell 22, including cooling the battery 2 or heating it. The thermal management component 23 may include a thermal management component 231 including a plurality of pipes for heat exchange with the battery cell 22, a current collector structure for collecting the fluids in the plurality of pipes, and a heat exchange medium inlet and outlet structure connected to an external device. The thermal management component 23 may include water cooling, air cooling and other structures in terms of different forms of fluid; may include a pipe structure or a plate structure in terms of different forms of structure; and may also include active thermal management or passive thermal management and other structures in terms of different forms of control.

[0068] According to one embodiment of the present application, the thermal management component 23 includes a straight tube 2311 and a bent tube 2312. By setting the bent tube 2312 to connect the two straight tubes 2311, the pipe arrangement density is increased. The straight tube 2311 can be a part of the pipe structure of the thermal management component 23. The straight tube 2311 contacts the box 21 or the battery cell 22 through the internal liquid medium or gas medium and performs heat exchange. The straight tube 2311 can be made of a material with good thermal conductivity such as metal or alloy. The straight tube 2311 can be a straight pipe, which can be made by an integral molding process such as extrusion and injection molding, or by a non-integrated molding process such as welding and splicing. The straight tube 2311 can be a flat pipe. A flat pipe is conducive to reducing the height space occupied, and a flat pipe side is conducive to increasing the contact area with the plane of the box 21 and the battery cell 22. The straight tube 2311 can also be a shape similar to a flat pipe, a cuboid, etc. that is suitable for full contact for heat exchange.

[0069] The bent tube 2312 may be a bent pipe structure in the thermal management component 23, with two straight tubes 2311 connected at both ends. The thermal management component 23 includes a plurality of straight tubes 2311 and bent tubes 2312 arranged in sequence. The bent tube 2312 changes the arrangement direction of the pipes in the thermal management component 23 by bending, thereby increasing the density of pipes in a fixed shape space. The bent tube 2312 may also contact and exchange heat with the housing 21 or the battery cell 22 through an internal fluid medium. The bent tube 2312 may be made of the same material with good thermal conductivity as the straight tube 2311, and the same material facilitates unified processing and manufacturing of the pipes. The bent tube 2312 may be a structure obtained by bending the straight tube 2311. The bent tube 2312 may be in the shape of an arc, which is convenient for bending at a larger angle without cracking.

[0070] like Figure 4 As shown, the bending angle 2313 can be the bending angle of the bending tube 2312 between two adjacent straight tubes 2311. The bending angle 2313 can be the angle formed by the intersection of the perpendicular lines 2313c made by the tangent lines 2313a at both ends of the bending tube 2312 at the two end points 2313b, that is, the angle of the arc formed by the bending tube 2312. The bending angle 2313 can be an angle greater than 180 degrees. The two adjacent straight tubes 2311 connected by the bending tube 2312 where the 180-degree bending angle 2313 is located are in a parallel state, similar to a U shape. Due to the limitations of pipeline materials and sizes, if the bending radius of the pipeline is too small, defects such as wrinkles and cracks will occur. Therefore, when the normal bending is 180 degrees, there will be a large gap between the pipelines, so that the length of the pipeline that can be stacked under the limited battery pack is limited. Under the same bending radius, when the bending angle 2313 is less than 180 degrees, the gap between the straight tubes 2311 will be larger, making the pipeline arrangement density lower.

[0071] By setting the bending angle 2313 greater than 180 degrees, the straight tubes 2311 connected to the bent tube 2312 at the bending angle 2313 are arranged more closely, and the pipes in the same area are arranged more densely, which is beneficial to increase the heat exchange contact area between the thermal management component 23 and the box 21 or the battery cell 22, and is beneficial to improve the heat exchange efficiency of the thermal management component 23.

[0072] In some embodiments, Figure 3 The thermal management assembly 23 includes at least one thermal management component 231 , and each thermal management component 231 includes a plurality of straight tubes 2311 and bent tubes 2312 that form a complete fluid circulation.

[0073] The thermal management component 231 may be a component used to control the temperature of an object by contacting it for heat exchange. A thermal management assembly 23 includes at least one thermal management component 231. The thermal management component 231 may be a complete flow channel composed of a straight pipe 2311, a bent pipe 2312, and a straight pipe 2311 connected in sequence. The thermal management component 231 may include a pipeline structure that uses a liquid medium or a gas medium for heat exchange, and may be a pipeline structure that actively performs heat exchange. The thermal management component 231 may control the temperature of itself or the medium contained therein to regulate the temperature of the battery 2. When the control temperature is higher than that of the battery 2, the battery 2 is heated and heated, and when the control temperature is lower than that of the battery 2, the battery 2 is cooled and cooled. The thermal management component 231 may be made of a material with good thermal conductivity, such as a metal or an alloy. The thermal management component 231 may be a flat pipe or other shape suitable for full contact for heat exchange. Optionally, such as Figure 3 As shown, when the thermal management assembly 23 includes two thermal management components 231, the two thermal management components 231 are properly arranged to make use of each other's unusable free space, thereby placing more pipes in the same area.

[0074] By providing at least one thermal management component 231 including a straight tube 2311 and a bent tube 2312, the thermal management component 23 has more arrangement and combination modes to improve space utilization. When the thermal management component 23 has more than two thermal management components 231, the unused gap space between the straight tubes 2311 and the straight tubes 2311 can be reduced by reasonable close arrangement, so that the pipeline arrangement of the thermal management component 231 in the same area is more dense, which is conducive to increasing the heat exchange contact area with the box 21 or the battery cell 22, and improving the heat exchange efficiency of the thermal management component 23.

[0075] In some embodiments, Figure 3The thermal management component 23 further includes a water inlet 2314 and a water outlet 2315, and the water inlet 2314 and the water outlet 2315 of at least one thermal management component 231 that forms a complete fluid cycle are distributed on the same side or different sides of the thermal management component 23, and / or the water inlets 2314 and the water outlets 2315 of different thermal management components 231 are distributed on the same side or different sides of the thermal management component 23.

[0076] The water inlet 2314 and the water outlet 2315 can be parts connected to the external heat exchange medium at both ends of the pipe of the thermal management component 231. Optionally, the water inlet 2314 can be connected to a continuous curved pipe, and then connected to the water outlet 2315 through a long straight pipe; similarly, the water inlet 2314 can also be connected to a long straight pipe, and then connected to the water outlet 2315 through a continuous curved pipe. A thermal management component 231 can have a water inlet 2314 and a water outlet 2315. All water inlets 2314 and water outlets 2315 of the thermal management component 231 constitute the water inlet 2314 and water outlet 2315 of the thermal management component 23. The water inlet 2314 and the water outlet 2315 can be regular shapes such as circles, squares or rectangles, or irregular shapes such as incomplete circles and quasi-circular shapes. The water inlet 2314 and the water outlet 2315 can have the same shape for easy processing and manufacturing. The water inlet 2314 can be connected to a plurality of straight pipes 2311 and bent pipes 2312 in sequence, and then connected to the water outlet 2315, to form a complete pipeline for fluid circulation so as to exchange heat with the outside. Optionally, when cooling, the fluid temperature at the water inlet 2314 is relatively low. After the heat exchange of the complete pipeline, the fluid temperature in the pipeline continues to rise, and the fluid temperature at the water outlet 2315 will be higher than the fluid temperature at the water inlet 2314.

[0077] The continuous bent pipe refers to a pipe formed by connecting a plurality of bent pipes 2312 in the order of bent pipe 2312 , straight pipe 2311 , bent pipe 2312 , etc. The long straight pipe is the same as the straight pipe 2316 .

[0078] Alternatively, if Figure 3 As shown, by arranging the water inlets 2314 and water outlets 2315 of all the thermal management components 231 under the thermal management assembly 23 to be distributed on the same side of the thermal management assembly 23, the thermal management assembly 23 only needs to be connected to a multi-channel current collector, and then connected to the external water channel through the current collector. This arrangement only occupies space on one side of the battery 2. Without affecting the heat exchange efficiency, it is beneficial to improve the internal space utilization of the battery 2 and increase the energy density of the battery 2.

[0079] Alternatively, if Figure 5As shown, by setting the water inlets 2314 and water outlets 2315 of the two thermal management components 231 not on the same side of the thermal management components 231, the water inlet 2314 and water outlet 2315 of one thermal management component 231 are set on one side of the thermal management component 23, and the water inlet 2314 and water outlet 2315 of the other thermal management component 231 are set on the other side of the thermal management component 23. This is conducive to adjusting the different fluid flow rates in different thermal management components 231 to meet different heat exchange requirements of the battery 2.

[0080] Alternatively, if Figure 6 As shown, by arranging the water inlet 2314 and the water outlet 2315 of the same thermal management component 231 not on the same side, the thermal management component 231 can achieve the effect of uniform heat exchange while reducing the long reflux straight pipe, which helps to reduce the manufacturing cost of the thermal management component 231.

[0081] In some embodiments, Figure 3 The heat management component 231 further includes at least one straight pipe 2316 , which is arranged to extend from the far end of the straight pipe 2311 and the bent pipe 2312 to the water inlet 2314 or the water outlet 2315 of the heat management component 23 .

[0082] The straight pipe 2316 can be a pipe extending from the far end of the straight pipe 2311 and the bent pipe 2312 to the water inlet 2314 or the water outlet 2315 of the thermal management component 23, and is a part of the thermal management component 231 together with the straight pipe 2311 and the bent pipe 2312. Both ends of the straight pipe 2316 can be connected to the bent pipe 2312, and then connected to the straight pipe 2311. The straight pipe 2316 can be arranged close to the bent pipe 2312 to increase the space utilization of the thermal management component 23. The bending angle 2313 of the bent pipe 2312 connected at both ends of the straight pipe 2316 can be 90 degrees or other angles less than or equal to 180 degrees. The straight pipe 2316 can be made of a material with good thermal conductivity, such as metal and alloy. The straight pipe 2316 can be a flat pipe or other shape suitable for full contact for heat exchange. Optionally, as Figure 3 As shown, the fluid flows in from the water inlet 2314, passes through the continuous straight pipe 2311 and the bent pipe 2312, then flows into the straight pipe 2316, and then passes through a short section of the bent pipe 2312 and the straight pipe 2311 to flow to the water outlet 2315. In addition, the water inlet 2314 and the water outlet 2315 can be replaced, and the fluid first passes through the straight pipe 2316 and then flows to the continuous straight pipe 2311 and the bent pipe 2312.

[0083] Under the condition that the pipelines of the thermal management component 23 are densely arranged, the water inlet 2314 and the water outlet 2315 are arranged on the same side of the thermal management component 23 by setting the straight pipe 2316. Therefore, only one multi-channel current collector is needed to realize the circulation between the thermal management component 23 and the external water circuit, and the multi-channel current collector only occupies the space on one side of the thermal management component 23, thereby improving the overall space utilization of the battery 2. The water inlet 2314 and the water outlet 2315 on one side also facilitate the arrangement of the water inlet and outlet 2315 of the electrical device 1.

[0084] In some embodiments, Figure 3 The thermal management assembly 23 includes two thermal management components 231 , the straight tubes 2311 of the two thermal management components 231 are arranged in close contact with the bent tubes 2312 , and the straight tubes 2316 of the two thermal management components 231 extend along the outer sides of the bent tubes 2312 .

[0085] When a single thermal management component 23 is bent, it is limited by the elastic modulus of the material. To avoid cracking, the two straight tubes 2311 connected by the bent tube 2312 cannot be closely attached, and the bent tube 2312 and the two connected straight tubes 2311 will surround an unused area. In order to further utilize this area, two thermal management components 231 are arranged in a nearly symmetrical manner, wherein the straight tubes 2311 of different thermal management components 231 are arranged in close proximity to the straight tubes 2311, and the bent tubes 2312 are arranged in close proximity to the bent tubes 2312. The straight tubes 2316 of the two thermal management components 231 are arranged on the outside, respectively, close to their respective bent tubes 2312.

[0086] By arranging two thermal management components 231 in a nearly symmetrical arrangement, one thermal management component 231 effectively utilizes the unused area of ​​the other thermal management component 231. This makes the pipeline arrangement more dense within the same area, which is beneficial to increase the heat exchange contact area between the thermal management component 23 and the battery 2, thereby improving the heat exchange efficiency of the thermal management component 23.

[0087] In some embodiments, Figure 3 The flow directions of the fluids in the two heat management components 231 are set to flow in opposite directions.

[0088] Opposite flow may refer to the opposite flow direction of the fluid in the two thermal management components 231. The two thermal management components 231 include a section where the two components are closely fitted, the section is continuously bent and is nearly symmetrically distributed. In any section of the pipe that fits together, the flow direction of the fluid in the pipes of the two thermal management components 231 may be opposite. Optionally, as Figure 3As shown, when the thermal management component 23 cools down the battery 2, the low-temperature fluid flows from the water inlet 2314 of one thermal management component 231 through the fitting part of the two components. The fluid continues to heat up during this process, and finally flows to the water outlet 2315 through the straight pipe 2316. At the same time, the low-temperature fluid flows from the water inlet 2314 of another thermal management component 231 through the straight pipe 2316, and then flows to the fitting part of the two components. During this process, the temperature slowly rises, and then flows to the water outlet 2315. The two components in any section of the tightly fitting part have an average temperature that is a combination of a higher temperature and a lower temperature. Conversely, the same is true when the thermal management component 23 heats up the battery 2.

[0089] By setting the flow directions of the fluids in the two thermal management components 231 to be opposite, any section of the tightly fitted parts of the two thermal management components 231 can have a uniform temperature outward, so that the battery 2 can be heat exchanged at a uniform temperature to ensure the stability of various performances of the battery 2.

[0090] In some embodiments, Figure 3 , 7 , 8. The bent tube 2312 and the straight tube 2311 in the thermal management component 23 include at least one flat surface.

[0091] The flat plane is one of the outer surfaces of the thermal management component 23 , and is also one of the outer surfaces of the bent tube 2312 and the straight tube 2311 .

[0092] The flat plane may be a surface for contacting the heat-managed component 231. Compared with the curved surface contact, the flat surface contact can have a larger contact area with the heat-managed component 231. In the heat-management component 231, the flat planes of the bent tube 2312 and the straight tube 2311 may face the same side, both facing the side in contact with the heat-managed component 231.

[0093] By arranging the bent tube 2312 and the straight tube 2311 to include at least one flat plane, the thermal management component 23 and the thermally managed component 231 are in planar contact, thereby increasing the contact area between the two and improving the heat exchange efficiency between the two.

[0094] In some embodiments, Figure 3 , 4 The bending angle 2313 is greater than 180 degrees and less than 210 degrees.

[0095] After further research, it was found that when the bending angle 2313 is 180-210 degrees, the bending effect is better. When the bending angle 2313 is too large, it is easy to cause the wall thickness of the bent tube 2312 to be thinned, resulting in the inability to withstand the pressure of the liquid inside the pipeline of the thermal management component 231. The pipeline arrangement of the thermal management component 231 will be more dense, and the arrangement of the thermal management assembly 23 composed of multiple thermal management components 231 will also be more dense.

[0096] By setting a more reasonable bending angle 2313, the pipe arrangement density within the same area is increased, thereby improving the heat exchange efficiency of the thermal management component 23 to the battery 2. The thermal management component 231 where the straight pipe 2311 and the bent pipe 2312 are located is more convenient to process.

[0097] The bending radius may refer to half of the sum of the bending radii of the inner side and the outer side of the pipe when the pipe is bent. The bending radius is affected by the thickness, hardness, and elastic modulus of the pipe. Generally, the greater the thickness, hardness, or elastic modulus of the pipe, the greater the bending radius. The smaller the bending radius, the smaller the space between the two straight pipes 2311 connected by the bending pipe 2312. While ensuring that the thermal conductivity of the thermal management component 231 is good, a material with a smaller thickness, smaller hardness, and smaller elastic modulus is selected to obtain a suitable bending radius.

[0098] The outer diameter of the bending tube 2312 may be the distance from the center of the bending tube 2312 to the outer wall of the bending tube 2312. The larger the outer diameter of the bending tube 2312, the greater the bending difficulty of the bending tube 2312, and the greater the bending radius. The gap between the two straight tubes 2311 connected by the bending tube 2312 is also greater.

[0099] The thickness is the distance from the outer wall of the pipe of the heat management component 231 to the inner wall of the pipe. The pipe thickness of the straight pipe 2311 and the bent pipe 2312 can be the same, which is convenient for processing and manufacturing together. The same pipe thickness is also conducive to uniform heat exchange of various parts of the battery 2. The smaller the pipe thickness, the smaller the bending radius.

[0100] Optionally, the outer diameter of the bent tube 2312 may be greater than or equal to 23 mm, the bending radius may be between 30 mm and 40 mm, and the bending thickness may be greater than 0.6 mm, so that the thermal management component 231 can make the bending angle 2313 of the pipe greater than 180 degrees without causing cracks in the pipe.

[0101] On the other hand, the present application embodiment also provides a battery 2, such as Figure 2 The battery 2 includes a thermal management component 23 and a housing 21. The thermal management component 23 is located outside the housing 21.

[0102] The box 21 may be a container for accommodating the battery cell 22 to protect the battery cell 22 from external collision. The side of the box 21 in contact with the thermal management component 23 is made of a material with good thermal conductivity, such as aluminum, copper or other metals or corresponding alloys.

[0103] The thermal management component 23 is located outside the box 21. Because the thermal management component 23 is limited by the bending radius and has a large gap space, the battery cells 22 that are directly in contact with the pipe of the thermal management component 23 will dissipate heat or heat up faster, while the battery cells 22 that are in contact with the gap space can only dissipate heat or heat up through the air, so that the direct contact between the thermal management component 23 and the battery 2 will cause uneven heat exchange. Compared with the thermal management component 23 with a layer of plate-like structure wrapped around the pipe, the outer periphery of the pipe of the thermal management component 23 in the embodiment of the present application is not wrapped with an additional plate-like structure, but uses the outer wall structure of the box 21 as a heat transfer medium to transfer the heat in the fluid pipe of the thermal management component 23 to the box 21, and then evenly exchange heat with the battery cells 22 through the box 21. In this way, the structure of the thermal management component 23 can be effectively simplified, saving materials while improving space utilization.

[0104] By arranging the thermal management component 23 outside the box 21, the thermal management component 231 first contacts the outer wall of the box 21 for heat exchange, and then the outer wall of the box 21 contacts the internal battery cells 22 for heat exchange. Using the outer wall of the box 21 as a heat transfer medium is conducive to uniform heat exchange of the internal battery cells 22. In addition, such a design can also simplify the structure of the thermal management component 23, and can make the flat box 21 structure support and fix the battery cells 22.

[0105] In some embodiments, Figure 2 , 7 The heat management component 23 is located at the bottom of the box body 21 , and the outer side of the heat management component 23 is covered with a buffer layer 24 .

[0106] The buffer layer 24 is a component disposed outside the water-cooled plate to protect the water-cooled plate from impact. The buffer layer 24 and the box body 21 form a storage space, which contains the battery cell 22 and the thermal management component 23. The buffer layer 24 can be a plate-like component with a buffering and protective function, such as a foam board, or a colloid that adheres the thermal management component 231 of the thermal management component 23 to the bottom of the outer side of the box body 21. The buffer layer 24 can be a plate-like structure with a groove, and the groove fits the pipe structure of the thermal management component 23, so that the buffer layer 24, the thermal management component 23 and the surface of the box body 21 are tightly attached.

[0107] The thermal management component 23 is arranged at the bottom of the box 21, and the buffer layer 24 is covered on the outside of the thermal management component 23. The buffer layer 24 and the box 21 form a storage space to accommodate the thermal management component 23. The buffer layer 24 protects the thermal management component 23 from direct collision, so that the internal thermal management component 231 can effectively dissipate heat from the bottom of the box 21 and the internal battery cells 22.

[0108] In some embodiments, Figure 2 , 7 8. The side of the bent tube 2312 and the straight tube 2311 of the thermal management component 23 facing the box body 21 is a flat surface.

[0109] like Figure 7 As shown, optionally, there may be three straight tubes 2311 of the thermal management assembly 23 under one battery cell 22 .

[0110] By setting the side of the bent tube 2312 and the straight tube 2311 facing the box body 21 to be a flat plane, the straight tube 2311 and the bent tube 2312 of the thermal management component 23 are in planar contact with the box body 21, and the contact area is larger than that of the curved surface contact, which effectively improves the heat exchange efficiency of the thermal management component 23 to the box body 21 and the internal battery cells 22.

[0111] In some embodiments, Figure 1 As shown, the embodiment of the present application further provides an electric device 1 , and the battery 2 is used to provide electric energy to the electric device 1 .

[0112] The electrical device 1 may be a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery vehicle, an electric car, a ship, a spacecraft, etc.

[0113] By using the battery 2 in the present application, it helps to improve the thermal management capability of the battery 2 and thus improve the battery life of the battery 2, thereby improving the battery life performance of the electrical device 1.

[0114] According to some embodiments of the present application, Figure 2 , 3 As shown in Figures 4, 7 and 8, the present application provides a thermal management component 23, which includes two thermal management components 231. The thermal management component 231 includes a plurality of straight tubes 2311 and bent tubes 2312. The bending angle 2313 of the bent tubes 2312 can be greater than 180 degrees and less than 210 degrees.

[0115] The thermal management component 23 is located outside the box body 21 . The outside of the thermal management component 23 is covered with a buffer layer 24 . The side of the bent tube 2312 and the straight tube 2311 of the thermal management component 23 facing the box body 21 is a flat plane.

[0116] By providing a bending tube 2312 with an angle greater than 180 degrees and less than 210 degrees, the plurality of thermal management components 23 can be reasonably densely arranged in a basically symmetrical structure without the bending tube 2312 being prone to cracking, thereby improving the space utilization of the thermal management components 23 .

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A thermal management component, characterized in that: include: At least two straight pipes, and at least one bent tube, each of which connects two adjacent straight tubes, and the bent tube includes a bending angle, Wherein, at least one of the bending angles is greater than 180 degrees.

2. The thermal management assembly of claim 1, wherein: The thermal management assembly includes at least one thermal management component, and each of the thermal management components includes a plurality of the straight tubes and the bent tubes forming a complete fluid circulation.

3. The thermal management assembly of claim 2, wherein: The thermal management component also includes a water inlet and a water outlet; the water inlet and the water outlet of at least one of the thermal management components that form a complete fluid circulation are distributed on the same side or different sides of the thermal management component, and / or the water inlets and the water outlets of different thermal management components are distributed on the same side or different sides of the thermal management component.

4. The thermal management assembly of claim 3, wherein: The thermal management component further includes at least one straight-through pipe, which is arranged to extend from the far end of the straight pipe and the bent pipe to the water inlet or the water outlet of the thermal management component.

5. The thermal management assembly of claim 4, wherein: The thermal management assembly includes two thermal management components, the straight tubes of the two thermal management components are arranged in close contact with the bent tube, and the straight tubes of the two thermal management components extend along the outer sides of the bent tubes respectively.

6. The thermal management assembly according to any one of claims 2 to 5, wherein: The flow directions of the fluids in the two heat management components are arranged to flow in opposite directions.

7. The thermal management assembly according to any one of claims 1 to 6, wherein: The bent tube and the straight tube in the thermal management assembly include at least one flat surface.

8. The thermal management assembly according to any one of claims 1 to 7, wherein: The bending angle is greater than 180 degrees and less than 210 degrees.

9. A battery, characterized in that: include: The thermal management assembly according to any one of claims 1 to 8; and The heat management component is located outside the box.

10. The battery according to claim 9, wherein The thermal management component is located at the bottom of the box, and the outer side of the thermal management component is covered with a buffer layer.

11. The battery according to claim 9 or 10, wherein: The bent tube and the straight tube of the thermal management component have a flat surface facing the box body.

12. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 9 to 11, wherein the battery is used to provide electrical energy to the electrical device.

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