Cases, batteries, and electrical equipment

Abstract

This application provides a case (10), a battery (100), and an electrical device, wherein the bottom plate (101) of the case (10) includes a composite plate (1011) and a heat exchange plate (1012), the composite plate (1011) includes a first material portion (10111) formed from a first material and a second material portion (10112) formed from a second material, a portion of the surface of the composite plate (1011) forms a first welded surface (1011a), the first welded surface (1011a) is formed from the first material portion (10111) and a portion of the surface of the heat exchange plate (1012) The first welding surface (1011a) is welded to the second welding surface (1012a). The heat exchange plate (1012) on the second welding surface (1012a) is formed from a third material, and the third material and the first material are of the same type. The case (10) provided by the embodiment of the present application can effectively improve the problem that the difficulty in welding the heat exchange plate (1012) affects the quality of the case (10) by replacing the aluminum plate with a composite plate (1011).

Description

Technical Field

[0001] This application cites Chinese Patent Application No. 202311476012.7, titled "Case, Battery and Electrical Equipment", filed on November 07, 2023, the entire content of which is incorporated herein by reference.

[0002] This application relates to the technical field of case structures, and particularly provides a case, a battery and an electrical equipment.

Background Art

[0003] With the development of power batteries, it has become a development trend for the cases of batteries to achieve a significant reduction in cost by replacing the materials. However, for the heat exchange structure of the case, it is necessary to adopt materials with excellent heat conduction performance. Therefore, the materials of the heat exchange structure and the case are different, and there is a difference in melting point between different materials, making welding difficult, which may affect the overall quality of the case.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An embodiment of this application aims to provide a case, a battery and an electrical equipment to solve the problem in the related art that it is difficult to weld and fix a heat exchange plate.

Means for Solving the Problems

[0005] To achieve the above object, the technical solutions adopted in the embodiments of this application are as follows.

[0006] In a first aspect, an embodiment of the present application provides a case for housing a battery cell, the case including a bottom plate, the bottom plate including a composite plate and a heat exchange plate, the composite plate including a first material portion formed from a first material and a second material portion formed from a second material, a portion of the surface of the composite plate forming a first welded surface, the first welded surface being formed from the first material portion, a portion of the surface of the heat exchange plate forming a second welded surface, the heat exchange plate at the second welded surface being formed from a third material, the third material and the first material being of the same type, and the first welded surface being welded to the second welded surface.

[0007] The beneficial effects of the embodiments of the present application are as follows: The case provided by the embodiments of the present application includes a composite plate and a heat exchange plate as the bottom plate of the case, achieving the objective of cost reduction by replacing the aluminum plate with the composite plate, and at the same time, the third material used to form the second weld surface of the heat exchange plate and the first material used for the first material portion that forms the first weld surface of the composite plate are of the same type, thereby enabling the welding of the first weld surface and the second weld surface, achieving the objective of welding and fixing the heat exchange plate and the composite plate, improving the reliability of the heat exchange plate connection, and thus effectively improving the problem that the difficulty in welding the heat exchange plate affects the quality of the case.

[0008] In some embodiments, the first material component includes at least one of a copper alloy or an aluminum alloy.

[0009] By adopting the above technical proposal, the first material may include at least one of copper alloys or aluminum alloys, and since copper alloys and aluminum alloys have relatively good thermal conductivity, the heat dissipation effect of the bottom plate including the composite plate is better.

[0010] In some embodiments, the first material portion includes a copper alloy layer or an aluminum alloy layer.

[0011] By adopting the above technical proposal, the first welding surface is formed on the surface of the copper alloy layer or aluminum alloy layer, and the second welding surface of the heat exchange plate can be welded to the copper alloy layer or aluminum alloy layer.

[0012] In some embodiments, the second material includes a steel alloy.

[0013] By adopting the above technical proposal, since the cost of steel alloy is lower than that of aluminum alloy or copper alloy, the cost of the bottom plate can be effectively reduced by including steel alloy in the second material part, and further the cost of the case can be reduced.

[0014] In some embodiments, the second material portion includes a steel alloy layer.

[0015] By adopting the above technical proposal, the objective of reducing the cost of composite panels can be effectively achieved by utilizing the steel alloy layer as a partial layer structure of the composite panel.

[0016] In some embodiments, the case further includes a frame, which is integrally molded with a composite panel.

[0017] By adopting the above technical proposal, the frame may be integrally molded with the composite panel, meaning that the frame can adopt a composite structure instead of an aluminum structure, further reducing the cost of the case. At the same time, integral molding of the frame and the composite panel reduces the welding process between the composite panel and the frame, and because the overall integrity of the frame and the composite panel is higher, the overall structural strength of the frame and the composite panel is better.

[0018] In some embodiments, the case further includes a frame, the surface of which a portion forms a third welded surface, the frame at the third welded surface being formed from a fourth material, the fourth material and the first or second material being of the same type, and the third welded surface being welded to the first welded surface.

[0019] By adopting the above technical proposal, the composite panel and the frame can be fixedly connected by welding, thereby increasing the connection strength between the composite panel and the frame and further improving the quality of the case.

[0020] In some embodiments, one side of the composite plate forming the first welded surface is recessed toward the opposing other side to form a first flow guide groove, and the heat exchange plate seals the first flow guide groove to form a flow path.

[0021] By adopting the above technical proposal, the first flow guide groove may be formed in the composite plate, and one side forming the first welding surface may be recessed toward the opposing other side. This allows the first flow guide groove to be sealed and capped to form a flow path so that when the heat exchange plate is welded to the first welding surface, the heat exchange plate can dissipate heat into the inside of the case.

[0022] In some embodiments, one side of the composite panel forming the first welded surface is positioned facing the battery cell.

[0023] By adopting the above technical proposal, one side forming the first welded surface of the composite panel is positioned toward the battery cell. As a result, the first flow guide groove, which is recessed toward the other side facing the first welded surface of the composite panel, protrudes toward the outside of the case. The outward protrusion formed by recessing the first flow guide groove effectively reduces the impact on the space inside the case that houses the battery cell.

[0024] In some embodiments, a second flow guide groove is formed as a recess in the heat exchange plate, and the composite plate seals the second flow guide groove to form a flow path.

[0025] By adopting the above technical proposal, a second flow guide groove can be formed recessed in the heat exchange plate. This allows the composite plate to seal the second flow guide groove and form a cooling channel when the heat exchange plate is welded to the first welding surface of the composite plate, thereby allowing the composite plate to dissipate heat into the inside of the case.

[0026] In some embodiments, one side forming the first welding surface of the composite plate is installed facing away from the battery cell.

[0027] By adopting the above technical solution, one side forming the first welding surface of the composite plate is installed facing away from the battery cell, that is, one side forming the first welding surface of the composite plate faces the outside of the case, and the heat exchange plate with the second flow guiding groove recessed is welded to the first welding surface of the composite plate outside the case to form a flow path. Therefore, the protruding structure generated by forming the second flow guiding groove of the heat exchange plate recessed is provided outside the case, and the influence exerted by the protruding structure on the space accommodating the battery cell inside the case can be effectively reduced.

[0028] In some embodiments, the case further includes a cooling water nozzle, the cooling water nozzle includes a water nozzle connection part formed from a fifth material, the fifth material and the first material are of the same type of material, the water nozzle connection part is welded to the first welding surface and communicates with the flow path.

[0029] By adopting the above technical solution, the cooling water nozzle communicates with the flow path and is used to introduce or discharge the cooling liquid into or from the flow path to achieve the purpose of heat exchange and temperature reduction. The cooling water nozzle can be integrally welded to the heat exchange plate to optimize the welding assembly process and reduce the manufacturing process of the case.

[0030] In some embodiments, the thickness of the first material part is M, and 0.05 mm ≤ M ≤ 3 mm.

[0031] By adopting the above technical solution, by setting the thickness of the first material part to be not less than 0.05 millimeter and not more than 3 millimeters, a certain thickness can be formed on the first material part so as to smoothly weld the heat exchange plate and the first welding surface to form a connection.

[0032] In some embodiments, the thickness M of the first material part is 0.1 mm ≤ M ≤ 1.5 mm.

[0033] By adopting the above technical proposal, the first material portion can be further optimized to be between 0.1 mm and 1.5 mm in thickness, based on forming a certain thickness in the first material portion so that the first welding surface can be welded together. This further limits the thickness range of the first material portion to increase the success rate of welding the first welding surface.

[0034] In a second aspect, the embodiment of the present application further provides a battery comprising a battery cell and the case, wherein the battery cell is housed within the case.

[0035] The beneficial effects of the embodiments of the present invention are as follows: The battery provided by the embodiments of the present invention includes the above-mentioned case, and since the case can be made of composite material to reduce costs and the second welding surface of the heat exchange plate can be welded by the first welding surface, the cost of the battery is lower and the product quality of the battery is improved.

[0036] In a third aspect, an embodiment of the present application provides an electrical device that includes the above-mentioned battery, the battery being used to provide electrical energy.

[0037] The beneficial effects of the embodiments of the present invention are as follows: The electrical equipment provided by the embodiments of the present invention includes the above-mentioned battery, and if the cost of the battery is lower, the cost of the electrical equipment is effectively reduced. [Brief explanation of the drawing]

[0038] To more clearly explain the technical concept in the embodiments of this application, the following briefly introduces the drawings that may be used to describe the embodiments or related technologies. Clearly, the drawings in the following description are only a few embodiments of this application, and those skilled in the art can obtain other drawings based on these without any creative work. [Figure 1] This is a schematic diagram of the structure of a vehicle provided by an embodiment of the present invention. [Figure 2] This is an exploded view of the battery provided by the embodiment of the present application. [Figure 3] This is a schematic diagram of the structure of the frame and base plate provided by the embodiment of the present application. [Figure 4] This is a schematic diagram of the connection between the composite panel and the heat exchanger provided by the embodiment of the present application. [Figure 5] This is a cross-sectional view of the connection between the composite panel and the heat exchanger provided by the embodiment of the present application. [Figure 6] This is a cross-sectional view of the connection between another composite panel and a heat exchanger panel provided by an embodiment of the present application. [Modes for carrying out the invention]

[0039] The embodiments of the present application will be described in detail below, and examples of the above embodiments are shown in the drawings, where the same or similar reference numerals throughout the text represent the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended for use in interpreting the present application, and should not be understood as limiting the present application.

[0040] In the description of this application, the directions or positional relationships indicated by terms such as "length," "width," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are directions or positional relationships shown based on the drawings, and are merely for the purpose of facilitating the description and simplification of the description. They do not indicate or imply that the referred device or element must necessarily have a specific direction, be composed of a specific direction, or be operated in a specific direction, and therefore should not be understood as limiting this application.

[0041] Furthermore, the terms “first” and “second” are merely for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the quantity of the technical features being referred to. Accordingly, features designated as “first” and “second” may explicitly or implicitly include one or more such features. In this description, “multiple” means two or more unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise specifically defined and limited, terms such as “attachment,” “connection,” “joining,” and “fixing” should be understood in a broad sense, for example, a fixed connection, a removable connection, or a single unit; a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or an internal communication between two elements or an interaction relationship between two elements. A person skilled in the art may understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0043] Judging from the current market developments, the applications of power batteries are expanding more and more. Power batteries are not only applied to energy storage and power systems such as hydroelectric, thermal, wind, and solar power plants, but are also widely applied to electric transportation methods such as electric bicycles, electric motorcycles, and electric vehicles, as well as to various fields such as military equipment and aerospace. As the application fields of power batteries continue to expand, the market demand for them will also continue to increase.

[0044] With the development of power batteries, reducing battery costs has become a crucial area of ​​development. In related technologies, cost reduction is mainly achieved by substituting steel for aluminum. Specifically, structures such as the bottom plate and frame of the case use steel instead of conventional aluminum. Since steel is cheaper than aluminum, the cost of using steel in the case is effectively reduced. However, because steel has relatively low heat dissipation properties, the heat dissipation effect of heat exchange structures formed from steel is relatively low. Therefore, heat exchange structures still need to be assembled using materials with relatively good thermal conductivity, such as aluminum or copper. However, because the difference in melting points between different materials is relatively large, it is difficult to form connections in heat exchange structures by welding.

[0045] To solve the connection problem between a heat exchange structure made of a different material and the base plate, a connection space for the heat exchange structure can be pre-designed. Specifically, by creating connection holes in the base plate, the heat exchange structure can be fixed to the base plate through the connection holes using fastening members, thereby forming a connection. Alternatively, an adhesive layer can be left on the base plate beforehand, and the heat exchange structure can be bonded to the base plate by applying the adhesive layer, thereby forming a fixed connection. However, the above method of connection using fastening members requires drilling holes in the base plate, which affects the airtightness and structural strength of the base plate, or, in the method of connection by adhesive fixing, the heat exchange structure may detach due to deterioration of the adhesive layer, further affecting the quality of the case.

[0046] Based on the above considerations, in order to solve the problem of difficulty in welding heat exchange structures made of different materials when adopting a steel case to meet cost reduction needs, the case was designed and composite panels were adopted. By using composite panels, the objective of cost reduction was achieved, and at the same time, since the first material forming the first weld surface of the composite panel and the second material forming the second weld surface of the heat exchange plate are of the same type, the second weld surface of the heat exchange plate and the first weld surface of the composite panel can be welded together. This effectively solves the problem of difficulty in attaching the heat exchange plate due to the inability to weld different materials, and improves the problems of increased material costs due to the connection of heat exchange plates with adhesive or fastening members, the impact on the level of automation in case production, and the impact on the product quality of the case.

[0047] The battery cells disclosed in the embodiments of this application may be used in electrical equipment that uses batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical equipment may include, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, electric scooters, electric vehicles, ships, and aerospace vehicles. Among these, electric toys may include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric boat toys and electric airplane toys, and aerospace vehicles may include airplanes, rockets, space shuttles and spacecraft.

[0048] In the following embodiments, for the sake of explanation, the electrical equipment according to one embodiment of the present application will be described as a vehicle 1000.

[0049] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 provided by some embodiments of the present application, the vehicle 1000 may be a fuel cell vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed in the bottom, front, or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 can function as the operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 controlling the battery 100 to supply power to the motor 300, and is used, for example, to meet the operating power needs of the vehicle 1000 during starting, navigation, and driving.

[0050] In some embodiments of the present invention, the battery 100 can not only function as an operating power source for the vehicle 1000, but can also provide driving force to the vehicle 1000 by replacing or partially replacing fuel or natural gas as a driving power source for the vehicle 1000.

[0051] Referring to Figure 2, which is an exploded view of a battery 100 provided in some embodiments of the present application, the battery 100 comprises a case 10 and a battery cell 20, the battery cell 20 being housed within the case 10. The case 10 is used to provide housing space for the battery cell 20, and the case 10 can employ various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 covering each other, and together the first portion 11 and the second portion 12 defining housing space for housing the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 together define a housing space, and both the first part 11 and the second part 12 may be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the case 10 formed by the first part 11 and the second part 12 may be of various shapes such as a cylinder or a rectangular parallelepiped.

[0052] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in series-parallel, where series-parallel connection means that the multiple battery cells 20 have both series and parallel connections. The multiple battery cells 20 may be directly connected in series, in parallel, or in series-parallel, and the entire assembly of the multiple battery cells 20 is housed in a case 10. Of course, the battery 100 may be in a form in which the multiple battery cells 20 are first connected in series, in parallel, or in series-parallel to form a battery module, and the multiple battery modules are further connected in series, in parallel, or in series-parallel to form the whole, and housed in a case 10. The battery 100 may further include other structures, for example, the battery 100 may further include bus members for realizing electrical connections between the multiple battery cells 20.

[0053] Each battery cell 20 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 20 may be cylindrical, flattened, rectangular, or have other shapes.

[0054] According to some embodiments of the present application, referring to Figures 2 to 6, in a first embodiment, the embodiment of the present application provides a case 10 for housing a battery cell 20, the case 10 includes a bottom plate 101, the bottom plate 101 includes a composite plate 1011 and a heat exchange plate 1012, the composite plate 1011 includes a first material portion 10111 formed from a first material and a second material portion 10112 formed from a second material, the composite plate A portion of the surface of 1011 forms a first welded surface 1011a, which is formed from a first material; a portion of the surface of the heat exchange plate 1012 forms a second welded surface 1012a, the heat exchange plate 1012 on the second welded surface 1012a is formed from a third material, the third material and the first material are of the same type; and the first welded surface 1011a is welded to the second welded surface 1012a.

[0055] Case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 covering each other, and together the first portion 11 and the second portion 12 defining a housing space for housing a battery cell 20.

[0056] In some embodiments, the second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, and the first portion 11 covers the open side of the second portion 12 such that the first portion 11 and the second portion 12 together define a storage space, and in this embodiment, the bottom plate 101 may form the first portion 11, or the bottom plate 101 may be any side plate-like structure of the second portion 12, for example, a side plate-like structure installed opposite the first portion 11.

[0057] In some other embodiments, both the first portion 11 and the second portion 12 may be hollow structures with one side open, the open side of the first portion 11 covering the open side of the second portion 12, and in this embodiment, the bottom plate 101 may be any side plate-like structure of the first portion 11, for example, a side plate-like structure installed facing the open side, or the bottom plate 101 may be any side plate-like structure of the second portion 12, for example, a side plate-like structure installed facing the open side.

[0058] The bottom plate 101 is an important component of the case 10. The bottom plate 101 may be used to support components such as battery cells 20. At the same time, the heat exchange plate 1012 on the bottom plate 101 is used for heat dissipation through heat exchange, thereby enabling heat dissipation from the inside of the case 10 through heat exchange.

[0059] The base plate 101 includes a composite plate 1011 and a heat exchange plate 1012. The composite plate 1011 refers to a plate structure formed by combining multiple types of materials. For example, thin plates of two or more different materials may be roll-pressed with mechanical pressure to form a composite plate, and two or more structural layers may be bonded together by cold welding or hot welding to form a single unit. In this way, the composite plate 1011 is formed by combining a lower-cost material and a higher-cost metal material. For example, by combining a lower-cost steel alloy and a relatively high-cost aluminum alloy, the resulting composite plate 1011 is less expensive than a structure using aluminum alloy alone. Therefore, the use of the composite plate 1011 can achieve the objective of saving costs.

[0060] The composite panel 1011 includes a first material portion 10111 and a second material portion 10112. The first material portion 10111 is formed from a first material, which includes, but is not limited to, a metallic material (such as copper, iron, or aluminum) or a non-metallic material (such as plastic). The first material portion 10111 may be a structural portion such as a layered portion or a solid portion formed from the first material. Similarly, the second material portion 10112 is formed from a second material, which includes, but is not limited to, a metallic material (such as copper, iron, or aluminum) or a non-metallic material (such as plastic). The second material portion 10112 may be a structural portion such as a layered portion or a solid portion formed from the second material.

[0061] For example, the composite panel 1011 may be a steel-aluminum composite panel, a steel-copper composite panel, or a composite panel formed by pressing plastic with copper or aluminum.

[0062] The heat exchange plate 1012 is welded to the composite plate 1011 and is used to exchange heat with the composite plate 1011 in order to dissipate heat and cool the inside of the case 10.

[0063] A portion of the surface of the heat exchange plate 1012 forms a second welding surface 1012a. Selectively, the heat exchange plate 1012 may be a plate structure made of an aluminum alloy, a copper alloy, or another material with relatively good thermal conductivity. The surface of the plate structure that contacts the first welding surface 1011a to form a weld is the second welding surface 1012a. Alternatively, the heat exchange plate 1012 may be a composite structure, for example, a steel-copper composite, a steel-aluminum composite, or a composite of plastic and copper or aluminum.

[0064] Of these, the heat exchange plate 1012 at the second welding surface 1012a is formed from a third material, and the third material and the first material are of the same type. To understand this, the fact that the third material and the first material are of the same type means that the main material of the third material and the first material is the same. For example, both the third material and the first material may be aluminum alloys, and even if they are of any specific type of aluminum alloy (i.e., there are differences in the metallic components and proportions in the aluminum alloy), they are all the same aluminum alloy material and can be considered to belong to the same type of material. As a result, based on the fact that the third material and the first material are of the same type, the melting points of the first welding surface 1011a and the second welding surface 1012a are approximately the same, and therefore a welded connection can be formed between the first welding surface 1011a and the second welding surface 1012a.

[0065] The term "same type of material" as used below is synonymous with the term "same type of material" used here, and it should be understood that the meaning of "same type of material" will not be repeated in the following context.

[0066] In some specific embodiments, the first material portion 10111 may be an aluminum alloy layer formed from an aluminum alloy, and the second material portion 10112 may be a steel alloy layer formed from a steel alloy, the first welding surface 1011a is formed on the surface of the aluminum alloy layer, and the heat exchange plate 1012 is an aluminum alloy plate, so that the second welding surface 1012a of the heat exchange plate 1012 is also formed from an aluminum alloy, thereby enabling welding between the first welding surface 1011a and the second welding surface 1012a.

[0067] In some other specific embodiments, the first material portion 10111 may be a copper alloy layer formed from a copper alloy, and the second material portion 10112 may be a steel alloy layer formed from a steel alloy, the first welding surface 1011a is formed on the surface of the copper alloy layer, the heat exchange plate 1012 is a copper-aluminum composite plate, the second welding surface 1012a of the heat exchange plate 1012 is formed from a copper alloy, and the portion of the heat exchange plate 1012 other than the second welding surface 1012a is formed from an aluminum alloy, thereby enabling welding between the first welding surface 1011a and the second welding surface 1012a.

[0068] In some other specific embodiments, the first material portion 10111 may be a steel alloy layer formed from a steel alloy, and the second material portion 10112 may be an aluminum alloy layer formed from an aluminum alloy, the first welding surface 1011a is formed on the surface of the steel alloy layer, the heat exchange plate 1012 is a steel-aluminum composite plate, the second welding surface 1012a of the heat exchange plate 1012 is formed from a steel alloy, and the portion of the heat exchange plate 1012 other than the second welding surface 1012a is formed from an aluminum alloy, thereby enabling welding between the first welding surface 1011a and the second welding surface 1012a.

[0069] The case 10 provided by the embodiment of the present application includes a composite plate 101 and a heat exchange plate 1012 in its bottom plate 101. The composite plate 1011 replaces the aluminum plate to achieve cost reduction. At the same time, the third material used to form the second weld surface 1012a of the heat exchange plate 1012 and the first material used for the first material portion 10111 that forms the first weld surface 1011a of the composite plate 1011 are of the same type. This allows the first weld surface 1011a and the second weld surface 1012a to be welded together, achieving the objective of welding and fixing the heat exchange plate 1012 to the composite plate 1011, thereby improving the reliability of the connection of the heat exchange plate 1012. Consequently, the problem of the quality of the case 10 being affected by the adoption of bonding or fastening methods due to the difficulty of welding the heat exchange plate 1012 can be effectively improved.

[0070] Referring to Figures 2 to 6, in some embodiments, the first material includes at least one of a copper alloy or an aluminum alloy.

[0071] As can be understood, since copper alloys and aluminum alloys have relatively good thermal conductivity, the first material may include a copper alloy or an aluminum alloy, and in either case, the first material portion 10111 can be given a relatively good heat dissipation effect.

[0072] Since the third material forming the second weld surface 1012a of the heat exchange plate 1012 and the first material are of the same type, the heat exchange plate 1012 at the second weld surface 1012a may be an aluminum alloy or a copper alloy. Since the first weld surface 1011a and the second weld surface 1012a are of the same type, for example, the materials of the first weld surface 1011a and the second weld surface 1012a are both aluminum alloys, the melting points of the first weld surface 1011a and the second weld surface 1012a are approximately the same, and a weld can be formed between the first weld surface 1011a and the second weld surface 1012a.

[0073] The first material forms the first material portion 10111, and selectively, the first material portion 10111 may be a layered structure, for example, a partial layer in the composite plate 1011 such as a single or multilayer aluminum alloy layer, a copper alloy layer, or the first material portion 10111 may be a solid structure, for example, a partial solid in any layer of the composite plate 1011 such as a partial solid of aluminum alloy embedded in a steel alloy layer of the composite plate 1011, a partial solid of copper alloy, etc.

[0074] Referring to Figures 4 to 6, in some embodiments, the first material portion 10111 includes a copper alloy layer or an aluminum alloy layer.

[0075] To make it understandable, a composite panel is a structure formed by pressing multiple types of materials together to create a multilayer structure, of which the first material portion 10111 may be at least one of the layers. For example, the composite panel 1011 may be a steel-aluminum composite panel, in which case the first material portion 10111 is an aluminum alloy layer in the steel-aluminum composite panel, and the first welded surface 1011a may be formed on the surface of the aluminum alloy layer. Similarly, the third material in the second welded surface 1012a of the heat exchanger panel 1012 may be an aluminum alloy, and the second welded surface 1012a may be welded to the first welded surface 1011a formed of the aluminum alloy layer.

[0076] Referring to Figures 2 to 6, in some embodiments, the second material includes a steel alloy.

[0077] As can be understood, since the cost of steel alloys is lower than that of aluminum alloys or copper alloys, the composite plate 1011 formed by combining a second material part 10112 made of steel alloy and a first material part 10111 made of aluminum alloy or copper alloy has a lower cost than the bottom plate 101 made of aluminum alloy or copper alloy. Therefore, the cost of case 10 can be reduced by including the composite plate 1011 in the bottom plate 101.

[0078] The second material forms the second material portion 10112, and in order to selectively replace aluminum with steel and reduce costs, the second material portion 10112 may be a layered structure, for example, a partial layer in the composite plate 1011 such as a single or multilayer steel alloy layer, or the second material portion 10112 may be a solid structure, for example, a partial solid in any layer of the composite plate 1011 such as a partial solid of steel alloy embedded in an aluminum alloy layer in the composite plate 1011.

[0079] Referring to Figures 4 to 6, in some embodiments, the second material portion 10112 includes a steel alloy layer.

[0080] To make it understandable, the composite panel 1011 is a structure formed by pressing multiple materials together to create a multilayer structure, in which the second material portion 10112 may be at least one of the layers. For example, the composite panel 1011 may be a steel-aluminum composite panel, a steel-copper composite panel, etc., in which the second material portion 10112 is a steel alloy layer in the steel-aluminum composite panel or steel-copper composite panel. By forming a steel alloy layer in the composite panel 1011 instead of using an aluminum alloy, the cost of the composite panel 1011 can be effectively reduced, and furthermore, the cost of case 10 using the composite panel 1011 can be effectively reduced.

[0081] Referring to Figures 2 to 6, in some embodiments, the case 10 further includes a frame 102, the frame 102 is integrally molded with the composite panel 1011.

[0082] The frame 102 may be the outer frame structure of the case 10 and have a certain structural strength, providing a certain level of protection and support to components such as the battery cells 20 inside the case 10. As can be understood, the frame 102 may include two or more side beams, and the multiple side beams are connected in sequence to surround and form the frame body portion of the frame 102. Selectively, the frame 102 may be the outer frame portion of the first part 11 of the case 10, or the frame 102 may be the outer frame portion of the second part 12.

[0083] To make it easier to understand, the frame 102 and the composite panel 1011 are integrally molded, meaning that the frame 102 and the composite panel 1011 can be integrally stamped without requiring other fixing processes such as welding or bonding. Furthermore, because the frame 102 and the composite panel 1011 employ integral stamping, the frame 102 and the composite panel 1011 are manufactured from the same material sheet through the stamping process, resulting in the frame 102 and the composite panel 1011 having matching materials, meaning that the frame 102 is also a composite structure.

[0084] By installing them in this manner, the frame 102 and the composite panel 1011 are manufactured by an integral molding process, reducing the welding connection operation between the frame 102 and the composite panel 1011, effectively improving production automation, and reducing labor costs. At the same time, since the frame 102 and the composite panel 1011 are integrally stamped, the material of the frame 102 and the material of the composite panel 1011 match. In other words, the frame 102 also adopts a composite structure, and by replacing the aluminum structure with a composite structure, the cost of the case 10 can be further reduced.

[0085] Referring to Figures 2 to 6, in some embodiments, case 10 further includes a frame 102, a portion of the surface of the frame 102 forming a third weld surface (not shown), the frame 102 at the third weld surface being formed from a fourth material, the fourth material and the first or second material being of the same type, and the third weld surface being welded to the first weld surface 1011a.

[0086] To make it clear, the third welding surface is used to contact the first welding surface 1011a and form a weld so as to weld and fix the composite plate 1011 and the frame 102.

[0087] In some embodiments, the fourth material and the first material are of the same type, and selectively, the first material may be an aluminum alloy, a copper alloy, or the like, but is not limited to these. Consequently, the fourth material may also be an aluminum alloy, a copper alloy, or the like, but is not limited to these. Exemplarily, the first material portion forming the first welded surface 1011a of the composite panel 1011 is formed from an aluminum alloy, and so the frame 102 also forms a third welded surface from an aluminum alloy material, and therefore the third welded surface of the frame 102 forms a weld with the first welded surface of the composite panel 1011, thereby achieving a fixed connection between the frame 102 and the composite panel 1011.

[0088] In this configuration, the frame 102 may be formed from the fourth material only at the third welded surface, while the parts of the frame 102 other than the third welded surface may be formed from other materials, such as a steel alloy. Thus, the frame 102 may also employ a composite structure, such as a steel-aluminum composite structure or a steel-copper composite structure, and the third welded surface of the frame 102 may be formed from the aluminum alloy in the composite structure. Alternatively, the frame 102 may be formed entirely from the fourth material; for example, the frame 102 may be an aluminum alloy frame or a copper alloy frame.

[0089] In some other embodiments, the fourth material and the second material are of the same type, and the second material may optionally be a steel alloy, plastic, etc., but is not limited to these. Similarly, the fourth material may also be a steel alloy, plastic, etc., but is not limited to these. For example, the second material forming the second material portion 10112 of the composite panel 1011 may be a steel alloy, so that the frame 102 also forms a third welded surface with a steel alloy material, and therefore the third welded surface of the frame 102 forms a weld with the first welded surface 1011a of the composite panel 1011, thereby achieving a fixed connection between the frame 102 and the composite panel 1011.

[0090] In this case, the frame 102 may be formed from the fourth material only at the third welded surface, and the parts of the frame 102 other than the third welded surface may be formed from other materials, such as an aluminum alloy or a copper alloy. Alternatively, the frame 102 may be formed entirely from the fourth material; for example, the frame 102 may be a steel alloy frame.

[0091] Referring to Figures 3, 4, and 6, in some embodiments, one side of the composite plate 1011 that forms the first welded surface 1011a is recessed toward the opposing other side to form the first flow guide groove 10113, and the heat exchange plate 1012 seals the first flow guide groove 10113 to form the flow path 1013.

[0092] To make it understandable, the first flow guide groove 10113 is a groove structure formed on the composite plate 1011 by methods such as stamping or bending, and the number of first flow guide grooves 10113 may be one or more. For example, if there is one first flow guide groove 10113, the first flow guide groove 10113 can be wrapped around and laid out on the composite plate 1011 in order to increase the passage range for the cooling medium and to further enhance the water cooling effect after the flow path 1013 has been formed in the first flow guide groove 10113.

[0093] Of these, the first flow guide groove 10113 is formed such that one side forming the first welded surface 1011a of the composite plate 1011 is recessed toward the opposite end; that is, one side forming the first welded surface 1011a of the composite plate 1011 has a structure that is recessed toward the inside, and the opposite end has a structure that is projected toward the outside.

[0094] The heat exchange plate 1012 is connected to the composite plate 1011, and the first welding surface 1011a and the second welding surface 1012a are welded together, for example by brazing. At this time, the heat exchange plate 1012 seals off the groove portion of the first flow guide groove 10113 to form a flow path 1013. As can be understood, the flow path 1013 is a relatively sealed passage structure formed when the heat exchange plate 1012 seals off the first flow guide groove 10113. The flow path 1013 is used for the passage of a cooling medium, and by using the cooling medium to perform heat exchange in the flow path 1013, the objective of cooling the battery cell 20 housed in the case 10 is achieved.

[0095] By installing it in this manner, one side of the composite plate 1011 that forms the first welding surface 1011a is recessed toward the opposite end to form the first flow guide groove 10113. As a result, when the second welding surface 1012a of the heat exchange plate is welded to the first welding surface 1011a of the composite plate 1011, the heat exchange plate 1012 can seal the first flow guide groove 10113 to form the flow path 1013, allowing the cooling medium to pass through the flow path 1013 and perform a cooling treatment on the inside of the case 10.

[0096] Referring to Figures 2 to 4 and Figure 6, in some embodiments, one side forming the first welded surface 1011a of the composite panel 1011 is positioned toward the battery cell 20.

[0097] To make it easier to understand, when one side of the composite plate 1011 that forms the first welded surface 1011a is recessed toward the opposing other end to form the first flow guide groove 10113, the side of the composite plate 1011 that forms the first welded surface 1011a has a structure that is recessed toward the inside, and the opposing other end has a structure that protrudes toward the outside.

[0098] In this embodiment, one side of the composite plate 1011 that forms the first welded surface 1011a is positioned facing the battery cell 20, that is, the first welded surface 1011a is located inside the case 10, and the second welded surface 1012a of the heat exchange plate 1012 and the first welded surface 1011a of the composite plate 1011 are welded together. As a result, the heat exchange plate 1012 is also located inside the case 10, and when the cooling medium passes through the flow path 1013, heat exchange is formed with the battery cell 20, thereby achieving the purpose of cooling.

[0099] At the same time, of the two opposing sides of the composite plate 1011, the side opposite to the side forming the first welding surface 1011a faces away from the battery cell 20 and towards the outside of the case 10. Therefore, the structure that protrudes outward by forming the first flow guide groove 10113 is also located outside the case 10.

[0100] By installing it in this manner, the protruding structure formed by stamping the first flow guide groove 10113 of the composite plate 1011 can be installed outside the case 10. Compared to a method in which the protruding structure is installed inside the case 10, this effectively reduces the influence of the protruding structure on the internal space of the case 10, and further effectively reduces the influence on the assembly of the battery cell 20.

[0101] Referring to Figures 2 to 5, in some embodiments, a second flow guide groove 10121 is formed as a recess in the heat exchange plate 1012, and the composite plate 1011 seals the second flow guide groove 10121 to form a flow path 1013.

[0102] To make it understandable, the second flow guide groove 10121 is a groove structure formed on the heat exchange plate 1012 by methods such as stamping or bending, and the number of second flow guide grooves 10121 may be one or more. For example, if there is one second flow guide groove 10121, the second flow guide groove 10121 can be wrapped around and laid out on the heat exchange plate 1012 in order to increase the flow range of the cooling medium after the flow path 1013 is formed in the second flow guide groove 10121, and to further effectively enhance the water cooling effect.

[0103] A second flow guide groove 10121 is formed in the heat exchange plate 1012 as a recess. Specifically, one side of the heat exchange plate 1012 that forms the second welding surface 1012a is recessed toward the opposing other side. As a result, when the second welding surface 1012a and the first welding surface 1011a are welded together, the composite plate 1011 can seal the second flow guide groove 10121 and form a flow path 1013.

[0104] By installing it in this manner, a second flow guide groove 10121 can be formed in the heat exchange plate 1012. As a result, when welding the second welding surface 1012a of the heat exchange plate 1012 to the first welding surface 1011a of the composite plate 1011, the side forming the first welding surface 1011a of the composite plate 1011 can be sealed off with the second flow guide groove 10121 to form the flow path 1013, so that the cooling medium passing through the flow path 1013 performs heat exchange cooling on the inside of the case 10.

[0105] Referring to Figures 2 to 5, in some embodiments, one side of the composite panel 1011 that forms the first welded surface 1011a is installed facing away from the battery cell 20.

[0106] To make it easier to understand, one side of the composite panel 1011 that forms the first welded surface 1011a is positioned facing away from the battery cell 20, that is, the first welded surface 1011a is located on the outside of the case 10.

[0107] As a result, when the second welding surface 1012a of the heat exchange plate 1012 is welded to the first welding surface 1011a of the composite plate 1011, the heat exchange plate 1012 is also positioned outside the case 10, and therefore the outward convex structure formed by recessing the second flow guide groove 10121 of the heat exchange plate 1012 is also located outside the case 10.

[0108] By installing it in this manner, the protruding structure formed by stamping the second flow guide groove 10121 of the heat exchange plate 1012 can be installed outside the case 10, effectively reducing the influence of this protruding structure on the internal space of the case 10, and further effectively reducing the influence on the assembly of the battery cell 20.

[0109] Referring to Figures 3 to 6, in some embodiments, case 10 further includes a cooling water nozzle (not shown), the cooling water nozzle including a water nozzle connector formed from a fifth material, the fifth material and the first material being of the same type, the water nozzle connector being welded to the first welded surface 1011a and communicating with the flow path 1013.

[0110] The cooling water nozzle is a valve-type device used to control the opening and closing of the cooling medium and the water flow rate at the inlet and outlet. The cooling water nozzle communicates with the flow path 1013 to control the inflow or outflow of the cooling medium into the flow path.

[0111] The water nozzle connection is the part of the cooling water nozzle that is welded to the first welding surface 1011a. Since the water nozzle connection is formed from a fifth material, and the fifth material and the first material are of the same type, the first material may be a copper alloy or an aluminum alloy, and therefore the fifth material may also be a copper alloy or an aluminum alloy, that is, the water nozzle connection may have a copper alloy structure or an aluminum alloy structure.

[0112] The cooling water nozzles can communicate with any one location in the flow path 1013, and exemplary, the cooling water nozzles can communicate with the ends of the flow path 1013 so that the coolant flows throughout the flow path 1013. There may be two or more cooling water nozzles, and exemplary, if there are two cooling water nozzles, the two cooling water nozzles may be connected to opposite ends of the flow path 1013, with one of the cooling water nozzles being used to introduce the coolant and the other cooling water nozzle being used to discharge the coolant.

[0113] By installing them in this manner, the fifth material forming the water nozzle connection and the first material forming the first welding surface 1011a are of the same type, for example, both being aluminum alloy materials, and the third material forming the third welding surface is also of the same type as the first material. Therefore, when performing the welding process, the water nozzle connection of the cooling water nozzle and the second welding surface 1012a of the heat exchange plate 1012 can be welded integrally, enabling simultaneous welding of the cooling water nozzle and the heat exchange plate 1012 to the composite plate 1011. This optimizes the welding assembly process and reduces the manufacturing steps of the case 10.

[0114] Referring to Figures 2 to 6, in some embodiments, the thickness of the first material portion 10111 is M, where 0.05 mm ≤ M ≤ 3 mm (hereinafter, "mm" will be used instead of millimeters).

[0115] To understand that the composite panel 1011 is formed by roll-pressing multiple types of metal materials under mechanical pressure, and may be a material layer formed by roll-pressing a first material portion 10111 and a second material portion 10112 to form two or more layers, and in some specific embodiments the composite panel 1011 may be roll-pressed to form a two-layer composite structure including a first layer structure formed from the first material portion 10111 and a second layer structure formed from the second material portion 10112, and to understand that the first welded surface 1011a is formed on the surface of the first layer structure.

[0116] By setting the thickness M of the first material portion 10111 to 0.05 mm or more, it is ensured that the first material portion 10111 has sufficient thickness to meet the welding requirements with the heat exchange plate 1012. At the same time, by setting the thickness M of the first material portion 10111 to 3 mm or less, the welding requirements with the first material portion 10111 are met, and by controlling the thickness of the first material portion 10111 to 3 mm or less, the amount of material used for the first material portion 10111 is reduced. This allows for a larger proportion of the lower-cost second material portion 10112, effectively reducing the cost of the composite plate 1011 and further achieving the objective of reducing the cost of case 10.

[0117] Referring to Figures 2 to 6, in several embodiments, the thickness M of the first material portion 10111 is 0.1 mm ≤ M ≤ 1.5 mm.

[0118] To make it easier to understand, in order to further optimize the connection strength between the composite panel 1011 and the heat exchange panel 1012, and to optimize the cost of the composite panel 1011, the thickness M of the first material portion 10111 is set to 0.1 mm or more and 1.5 mm or less. This results in better welding strength between the first welded surface 1011a formed on the first material portion 10111 and the second welded surface 1012a of the heat exchange panel 1012, while effectively controlling the cost of the composite panel 1011.

[0119] Exemplary, in some specific embodiments, case 10 includes a frame 102, a composite panel 1011, and a heat exchange panel 1012, wherein the heat exchange panel 1012 is selected from an aluminum material plate, and the composite panel 1011 includes a first material portion 10111 formed from an aluminum alloy and a second material portion 10112 formed from a steel alloy, wherein the first material portion 10111 can form an aluminum layer structure, and the second material portion 10112 can form a steel layer structure, that is, the composite panel 1011 is a steel-aluminum composite panel formed by roll pressing a steel plate and an aluminum plate, and the first welded surface 1011a is formed on the surface of the aluminum layer structure At the same time, the frame 102 may be made of a steel-aluminum composite material, so that the frame 102 and the composite plate 1011 may be integrally stamped and molded from the same steel-aluminum composite material, the second welding surface 1012a of the heat exchange plate 1012 and the first welding surface 1011a of the composite plate 1011 are welded to form the bottom plate 101, and the space between the heat exchange plate 1012 and the composite plate 1011 surrounds the flow path 1013, the case 10 further includes an aluminum alloy water nozzle, the aluminum alloy water nozzle may be integrally welded to the heat exchange plate 1012 and the first welding surface 1011a of the composite plate 1011 in order to reduce the welding process.

[0120] Referring to Figures 2 and 3, in a second embodiment, the present invention further provides a battery 100 comprising a battery cell 20 and the case 10, wherein the battery cell 20 is housed within the case 10. The battery 100 employs any of the cases 10 described in the above embodiments, and their description is omitted here.

[0121] Referring to Figures 1 and 2, in a third embodiment, the present invention further provides an electrical device comprising the battery 100, the battery 100 being used to provide electrical energy. The electrical device may be any of the electrical devices described in the above embodiments, for example, a vehicle 1000, the description of which is omitted here.

[0122] The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, and improvements made without departing from the spirit and principles of the present application should all be included within the scope of the claims. [Explanation of Symbols]

[0123] 1000 vehicles 100 batteries 200 controllers 300 motor 10 cases 11 Part 1 12. Part 2 20 battery cells 101 Bottom plate 1011 Composite board 1011a First welding surface 10111 First Material Section 10112 Second Material Section 10113 First flow guide groove 1012 Heat exchange plate 1012a Second welding surface 10121 Second flow guide groove 1013 Flow channel 102 frames

Claims

1. A case for housing a battery cell, wherein the case is The present invention relates to a base plate, the base plate comprising a composite plate and a heat exchange plate, the composite plate comprising a first material portion formed from a first material and a second material portion formed from a second material, a portion of the surface of the composite plate forming a first welded surface, the first welded surface being formed from the first material portion, a portion of the surface of the heat exchange plate forming a second welded surface, the heat exchange plate at the second welded surface being formed from a third material, the third material and the first material being of the same type, and the first welded surface being welded to the second welded surface. case.

2. The case according to claim 1, characterized in that the first material includes at least one of a copper alloy or an aluminum alloy.

3. The case according to claim 2, characterized in that the first material portion includes a copper alloy layer or an aluminum alloy layer.

4. The case according to claim 1, characterized in that the second material includes a steel alloy.

5. The case according to claim 4, characterized in that the second material portion includes a steel alloy layer.

6. The case according to claim 1, wherein the case further includes a frame, the frame being integrally molded with the composite panel.

7. The case according to claim 1, further comprising a frame, wherein a portion of the surface of the frame forms a third welded surface, the frame at the third welded surface is formed of a fourth material, the fourth material and the first or second material are of the same type, and the third welded surface is welded to the first welded surface.

8. The case according to claim 1, characterized in that one side of the composite plate forming the first welded surface is recessed toward the opposing other side to form a first flow guide groove, and the heat exchange plate seals the first flow guide groove with a cap to form a flow path.

9. The case according to claim 8, characterized in that one side of the composite panel forming the first welded surface is installed facing the battery cell.

10. The case according to claim 1, characterized in that a second flow guide groove is formed in the heat exchange plate as a recess, and the composite plate seals the second flow guide groove with a cap to form a flow path.

11. The case according to claim 10, characterized in that one side of the composite panel forming the first welded surface is installed facing away from the battery cell.

12. The case according to claim 8, further comprising a cooling water nozzle, the cooling water nozzle comprising a water nozzle connector formed from a fifth material, wherein the fifth material and the first material are of the same type, and the water nozzle connector is welded to the first welded surface and communicates with the flow path.

13. The case according to claim 1, characterized in that the thickness of the first material portion is M, and 0.05 mm ≤ M ≤ 3 mm.

14. The case according to claim 13, characterized in that the thickness M of the first material portion is 0.1 mm ≤ M ≤ 1.5 mm.

15. A battery comprising a battery cell and a case according to any one of claims 1 to 14, wherein the battery cell is housed in the case.

16. An electrical device comprising the battery described in claim 15, wherein the battery is used to provide electrical energy.

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