Battery, battery case and electric device

Abstract

Disclosed in the present application are a battery, a battery case and an electric device. The battery comprises a battery case and battery cells. The battery case forms an accommodating space, the battery case comprising a main body and a heat exchange member, wherein the main body comprises a first metal layer and a second metal layer which are stacked, the main body serving as a wall of the accommodating space, and the heat exchange member is welded to the second metal layer; the first metal layer is made of a first material, and the second metal layer and the heat exchange member are made of a second material. The battery cells are arranged in the accommodating space. The first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchange member includes an aluminum heat exchange member; alternatively, the first metal layer includes an aluminum plate layer, the second metal layer includes a steel plate layer, and the heat exchange member includes a steel heat exchange member. The main body is provided with a first aluminum-removed area; the main body further comprises a support beam, which is located in the accommodating space and is welded to the steel plate layer corresponding to the first aluminum-removed area. The present application can simplify the assembly process, improve the stability between the heat exchange member and the main body, and improve the thermal management efficiency of the battery.

Description

Batteries, battery cases and electrical devices

[0001] This application claims priority to Chinese Patent Application No. 2024216279220, filed on July 10, 2024, entitled “Battery, Battery Housing and Electrical Device”, the entirety of which is incorporated herein by reference. [Technical Field]

[0002] This application relates to the field of battery technology, and in particular to a battery, battery housing, and electrical device. [Background Technology]

[0003] With the development of battery technology, batteries are being applied in more and more fields, gradually replacing traditional fossil fuels in areas such as automotive power. Batteries can store chemical energy and controllably convert it into electrical energy. In recyclable batteries, the active materials can be reactivated by charging after discharge, allowing for continued use.

[0004] In related technologies, the battery casing includes a main body and a water-cooling plate, with the water-cooling plate fixed to the main body by applying adhesive. However, due to the long curing time and inconsistent adhesive thickness, this connection method not only complicates the assembly process but also results in poor thermal management efficiency. [Summary of the Invention]

[0005] In view of the above problems, this application provides a battery, a battery housing, and an electrical device to simplify the assembly process, improve the stability between the heat exchange component and the main body, improve the thermal management efficiency of the battery, and thus improve the reliability of the battery and the electrical device.

[0006] In a first aspect, this application provides a battery, which includes a battery housing and battery cells. The battery housing forms a receiving space and includes a body and a heat exchanger. The body includes a first metal layer and a second metal layer stacked together, and the body serves as the wall of the receiving space. The heat exchanger is welded to the second metal layer. The first metal layer is a first material, and the second metal layer and the heat exchanger are second materials. The battery cells are disposed in the receiving space. The first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchanger includes an aluminum heat exchanger; or the first metal layer includes an aluminum plate layer, the second metal layer includes a steel plate layer, and the heat exchanger includes a steel heat exchanger. The body has a first aluminum stripping area and also includes a support beam located within the receiving space and welded to the steel plate layer corresponding to the first aluminum stripping area. The battery housing can be used to install individual battery cells, improving their anti-interference capabilities, safety, and reliability. The heat exchanger can exchange heat with the battery cells inside the housing, further enhancing battery safety and reliability. The main body comprises a first metal layer and a second metal layer stacked together, allowing it to possess the characteristics of both layers. This increases strength while facilitating welding to the heat exchanger, simplifying assembly and enabling automated production. Welding also improves the connection stability between the heat exchanger and the main body, thereby enhancing the battery's thermal management efficiency and reliability. Furthermore, the main body serves as the wall of the containing space, with the heat exchanger welded to its second metal layer, facilitating heat exchange between the heat exchanger and the battery cells within the space, thus improving thermal management efficiency. Additionally, both the second metal layer and the heat exchanger are made of the same material, which facilitates welding, improving welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger and the main body, enhances the thermal management efficiency of the battery, and thus improves the reliability of the battery and the power-consuming device. When the first metal layer includes a steel plate layer and the second metal layer includes an aluminum plate layer, meaning the main body includes stacked steel and aluminum plate layers, the main body possesses not only the high strength and high melting point of steel but also the excellent electrical and thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the main body, thereby enhancing the reliability of the battery housing. When the second metal layer includes a steel plate layer, the first metal layer includes an aluminum plate layer, and the heat exchanger includes a steel heat exchanger, this configuration facilitates welding the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger. Welding the support beam to the steel plate layer strengthens the structure of the main body, thus enabling... Improving the structural stability of the battery box: The support beam is set within the accommodating space formed by the main body, which can limit the position of the battery cells within the accommodating space, thus improving the positional stability of the battery cells and consequently improving the overall stability of the battery; The support beam is welded to the steel plate layer corresponding to the first aluminum stripping area, that is, the welding area is the area on the main body where only the steel plate layer remains. When the aluminum plate layer is located on the side of the main body where the support beam is set, and the steel plate layer is located on the side of the main body away from the support beam, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam and the steel plate layer; When the steel plate layer is located on the side of the main body where the support beam is set, and the aluminum plate layer is located on the side of the main body away from the support beam, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0007] In some embodiments, the first metal layer is disposed facing the receiving space. The first metal layer facing the receiving space means that the second metal layer is disposed on the side of the body away from the receiving space. This facilitates welding the second metal layer to the heat exchanger located outside the receiving space, improving assembly convenience. Furthermore, placing the heat exchanger outside the receiving space reduces the risk of heat exchange medium leaking into the receiving space and affecting the battery cells, thus further improving battery reliability.

[0008] In some embodiments, a limiting portion is formed on the side of the second metal layer facing the heat exchanger, and the heat exchanger is at least partially embedded in the limiting portion. The limiting portion on the side of the second metal layer facing the heat exchanger facilitates the embedding of the heat exchanger in the limiting portion, and the limiting portion can limit the heat exchanger, thereby improving the structural stability of the heat exchanger and the reliability of the lower housing, battery housing, and battery.

[0009] In some embodiments, the limiting portion includes a protrusion. The protrusion has a simple structure and facilitates the limiting of the heat exchange component. As a limiting portion, it is disposed on the side of the second metal layer facing the heat exchange component, thus reinforcing the second metal layer. Therefore, this arrangement allows the limiting portion to both limit the heat exchange component and reinforce the body including the second metal layer. The structure is simple, reduces the manufacturing and assembly process of the lower housing, and improves structural stability.

[0010] In some embodiments, a second metal layer is disposed at least at the bottom of the receiving space. This second metal layer facilitates welding of the heat exchanger to the second metal layer, improving the uniformity and reliability of the welded connection between the heat exchanger and the second metal layer. Furthermore, placing the heat exchanger at the bottom of the receiving space increases the welding area between the heat exchanger and the main body, thereby improving the heat exchange efficiency and connection stability between the heat exchanger and the battery cells within the receiving space, and enhancing the reliability of the battery housing and the battery.

[0011] In some embodiments, the aluminum plate layer is at least disposed at the bottom of the receiving space, and the first aluminum stripping area is at least partially located at the bottom of the receiving space. The fact that the first aluminum stripping area is at least partially located at the bottom of the receiving space means that the welding area is at least partially located at the bottom of the receiving space (for example, in some applications, the welding area may also be located on the side and bottom of the receiving space). This arrangement can increase the welding area between the support beam and the first metal layer, making it easier to fix the support beam and thus improving the structural stability of the support beam.

[0012] In some embodiments, the aluminum plate layer is further disposed on the side of the receiving space, the body is provided with a second aluminum stripping area, the second aluminum stripping area is at least partially located on the side of the receiving space, and the body also includes a suspension beam located on the side of the body away from the receiving space and welded to the steel plate layer corresponding to the second aluminum stripping area. To increase the structural strength of the main body, the suspension beam can be made of steel. The suspension beam facilitates connection with external components to fix the main body, improving the positional stability of the battery box. Furthermore, the suspension beam is located on the side of the main body away from the receiving space, i.e., outside the receiving space, facilitating welding between the suspension beam and the main body. Furthermore, the steel plate layer corresponding to the second aluminum stripping area of ​​the main body is directly welded to the suspension beam, increasing the convenience and reliability of welding between the suspension beam and the steel plate layer. The suspension beam is welded at least to the side of the receiving space, facilitating the fixing of the main body via the suspension beam. Furthermore, the suspension beam is welded to the steel plate layer corresponding to the second aluminum stripping area, i.e., the welding area is the area on the main body where only the steel plate layer remains. Since the melting point of steel is higher than that of aluminum, setting the second aluminum stripping area as the welding area reduces the problem of the aluminum plate layer melting before the steel plate layer during welding. Furthermore, in some application scenarios, when the aluminum plate layer is located on the side of the main body where the suspension beam is located, and the steel plate layer is located on the side of the main body away from the side where the suspension beam is located, the second aluminum stripping area facilitates exposing the steel plate layer, thus facilitating welding between the suspension beam and the steel plate layer.

[0013] In some embodiments, the first metal layer and the second metal layer are cold-rolled structures. The cold rolling process can produce parts with high surface finish, and it can directly shape metal sheets or bars, reducing steps such as cutting and welding. Therefore, it has high material utilization, low waste, high automation, and fast production speed, making it suitable for large-scale production and reducing production costs and time.

[0014] In some embodiments, the body forms a receiving space with an opening, and the battery housing further includes a cover disposed on the body to close the opening. The body forms a receiving space with an opening, through which individual battery cells can be disposed; the cover disposed on the body to close the opening facilitates improved interference resistance of the individual battery cells within the receiving space and enhances protection for the individual battery cells.

[0015] In some embodiments, the heat exchanger includes a serpentine aluminum tube. The serpentine aluminum tube facilitates welding to the second metal layer of the body, facilitates fixation and positioning, and reduces production costs.

[0016] In some embodiments, the thickness of the first metal layer is 0.3–2.3 mm. This configuration can improve the strength of the lower housing to meet various operating conditions while reducing the weight of the main body and facilitating processing.

[0017] In some embodiments, the thickness of the first metal layer is 0.5 to 2.0 mm.

[0018] In some embodiments, the thickness of the second metal layer is 0.03 mm to 1.3 mm. This arrangement facilitates welding between the heat exchanger and the second metal layer.

[0019] In some embodiments, the thickness of the second metal layer is 0.05 mm to 1.0 mm.

[0020] Secondly, this application provides a battery housing, which includes a body and a heat exchanger. The body includes a first metal layer and a second metal layer stacked together. The heat exchanger is welded to the second metal layer. The first metal layer is a first material, and the second metal layer and the heat exchanger are second materials. The body serves as the wall of a receiving space for accommodating individual battery cells. The first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchanger includes an aluminum heat exchanger; or the second metal layer includes a steel plate layer, the first metal layer includes an aluminum plate layer, and the heat exchanger includes a steel heat exchanger. The body has a first aluminum stripping area and a support beam located within the receiving space and welded to the steel plate layer corresponding to the first aluminum stripping area. The battery housing can be used to install individual battery cells, improving their anti-interference capabilities, safety, and reliability. The heat exchanger can exchange heat with the battery cells inside the housing, further enhancing battery safety and reliability. The main body comprises a first metal layer and a second metal layer stacked together, allowing it to possess the characteristics of both layers. This increases strength while facilitating welding to the heat exchanger, simplifying assembly and enabling automated production. Welding also improves the connection stability between the heat exchanger and the main body, thereby enhancing the battery's thermal management efficiency and reliability. Furthermore, the main body serves as the wall of the containing space, with the heat exchanger welded to its second metal layer, facilitating heat exchange between the heat exchanger and the battery cells within the space, thus improving thermal management efficiency. Additionally, both the second metal layer and the heat exchanger are made of the same material, which facilitates welding, improving welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger and the main body, enhances the thermal management efficiency of the battery, and thus improves the reliability of the battery and the power-consuming device. When the first metal layer includes a steel plate layer and the second metal layer includes an aluminum plate layer, meaning the main body includes stacked steel and aluminum plate layers, the main body possesses not only the high strength and high melting point of steel but also the excellent electrical and thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the main body, thereby enhancing the reliability of the battery housing. When the second metal layer includes a steel plate layer, the first metal layer includes an aluminum plate layer, and the heat exchanger includes a steel heat exchanger, this configuration facilitates welding the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger. Welding the support beam to the steel plate layer strengthens the structure of the main body, thus enabling... Improving the structural stability of the battery box: The support beam is set within the accommodating space formed by the main body, which can limit the position of the battery cells within the accommodating space, thus improving the positional stability of the battery cells and consequently improving the overall stability of the battery; The support beam is welded to the steel plate layer corresponding to the first aluminum stripping area, that is, the welding area is the area on the main body where only the steel plate layer remains. When the aluminum plate layer is located on the side of the main body where the support beam is set, and the steel plate layer is located on the side of the main body away from the support beam, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam and the steel plate layer; When the steel plate layer is located on the side of the main body where the support beam is set, and the aluminum plate layer is located on the side of the main body away from the support beam, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0021] Thirdly, this application provides an electrical device comprising: the aforementioned battery. The battery housing can be used to install individual battery cells, improving the anti-interference capability of the battery cells and enhancing their safety and reliability. The heat exchanger can exchange heat with the battery cells within the battery housing, improving the battery's safety and reliability. The body comprises a first metal layer and a second metal layer stacked together, allowing the body to possess the characteristics of both layers. This improves the body's strength while facilitating welding to the heat exchanger, simplifying the assembly process and enabling automated production. Welding also enhances the connection stability between the heat exchanger and the body, thereby improving the battery's thermal management efficiency and reliability. Furthermore, the body serves as the wall of the accommodating space, with the heat exchanger welded to the second metal layer of the body, facilitating heat exchange between the heat exchanger and the battery cells within the accommodating space, thus improving the battery's thermal management efficiency. Additionally, both the second metal layer and the heat exchanger are made of the same material, which facilitates welding, improving welding quality and efficiency. Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger and the main body, enhances the thermal management efficiency of the battery, and thus improves the reliability of the battery and the power-consuming device. When the first metal layer includes a steel plate layer and the second metal layer includes an aluminum plate layer, meaning the main body includes stacked steel and aluminum plate layers, the main body possesses not only the high strength and high melting point of steel but also the excellent electrical and thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the main body, thereby enhancing the reliability of the battery housing. When the second metal layer includes a steel plate layer, the first metal layer includes an aluminum plate layer, and the heat exchanger includes a steel heat exchanger, this configuration facilitates welding the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger. Welding the support beam to the steel plate layer strengthens the structure of the main body, thus enabling... Improving the structural stability of the battery box: The support beam is set within the accommodating space formed by the main body, which can limit the position of the battery cells within the accommodating space, thus improving the positional stability of the battery cells and consequently improving the overall stability of the battery; The support beam is welded to the steel plate layer corresponding to the first aluminum stripping area, that is, the welding area is the area on the main body where only the steel plate layer remains. When the aluminum plate layer is located on the side of the main body where the support beam is set, and the steel plate layer is located on the side of the main body away from the support beam, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam and the steel plate layer; When the steel plate layer is located on the side of the main body where the support beam is set, and the aluminum plate layer is located on the side of the main body away from the support beam, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0022] The battery provided in this application includes a battery housing and battery cells. The battery housing forms a receiving space and includes a body and a heat exchanger. The body includes a first metal layer and a second metal layer stacked together, and the body serves as the wall of the receiving space. The heat exchanger is welded to the second metal layer. The first metal layer is a first material, and the second metal layer and the heat exchanger are second materials. The battery cells are disposed in the receiving space. The first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchanger includes an aluminum heat exchanger; or the first metal layer includes an aluminum plate layer, the second metal layer includes a steel plate layer, and the heat exchanger includes a steel heat exchanger. The body has a first aluminum stripping area and also includes a support beam located within the receiving space and welded to the steel plate layer corresponding to the first aluminum stripping area. The battery housing can be used to install individual battery cells, improving their anti-interference capabilities, safety, and reliability. The heat exchanger can exchange heat with the battery cells inside the housing, further enhancing battery safety and reliability. The main body comprises a first metal layer and a second metal layer stacked together, allowing it to possess the characteristics of both layers. This increases strength while facilitating welding to the heat exchanger, simplifying assembly and enabling automated production. Welding also improves the connection stability between the heat exchanger and the main body, thereby enhancing the battery's thermal management efficiency and reliability. Furthermore, the main body serves as the wall of the containing space, with the heat exchanger welded to its second metal layer, facilitating heat exchange between the heat exchanger and the battery cells within the space, thus improving thermal management efficiency. Additionally, both the second metal layer and the heat exchanger are made of the same material, which facilitates welding, improving welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger and the main body, enhances the thermal management efficiency of the battery, and thus improves the reliability of the battery and the power-consuming device. When the first metal layer includes a steel plate layer and the second metal layer includes an aluminum plate layer, meaning the main body includes stacked steel and aluminum plate layers, the main body possesses not only the high strength and high melting point of steel but also the excellent electrical and thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the main body, thereby enhancing the reliability of the battery housing. When the second metal layer includes a steel plate layer, the first metal layer includes an aluminum plate layer, and the heat exchanger includes a steel heat exchanger, this configuration facilitates welding the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger. Welding the support beam to the steel plate layer strengthens the structure of the main body, thus enabling... Improving the structural stability of the battery box: The support beam is set within the accommodating space formed by the main body, which can limit the position of the battery cells within the accommodating space, thus improving the positional stability of the battery cells and consequently improving the overall stability of the battery; The support beam is welded to the steel plate layer corresponding to the first aluminum stripping area, that is, the welding area is the area on the main body where only the steel plate layer remains. When the aluminum plate layer is located on the side of the main body where the support beam is set, and the steel plate layer is located on the side of the main body away from the support beam, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam and the steel plate layer; When the steel plate layer is located on the side of the main body where the support beam is set, and the aluminum plate layer is located on the side of the main body away from the support beam, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality. [Attached Image Description]

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments;

[0025] Figure 2 is an exploded structural diagram of a battery according to one or more embodiments;

[0026] Figure 3 is a structural schematic diagram of the lower casing of a battery box according to one or more embodiments;

[0027] Figure 4 is a side view of the embodiment shown in Figure 3;

[0028] Figure 5 is a bottom view of the embodiment shown in Figure 3;

[0029] Figure 6 is another side view of the embodiment shown in Figure 3;

[0030] Figure 7 is another side view of the embodiment shown in Figure 3.

[0031] The reference numerals in the detailed embodiments are as follows:

[0032] Vehicle 1000a, battery 100a, controller 200a, motor 300a, battery cell 1, battery box 10, cover 11, body 12, lower box 121, heat exchanger 13, first metal layer 1211, second metal layer 1212, accommodating space 101, limiting part 30, support beam 122, suspension beam 123.

Detailed Implementation Methods

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0037] In the description of the embodiments of this application, the technical terms "thickness", "bottom", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] In the description of the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] With the development of battery technology, batteries are being applied in more and more fields, gradually replacing traditional fossil fuels in areas such as automotive power. Batteries can store chemical energy and controllably convert it into electrical energy. In recyclable batteries, the active materials can be reactivated by charging after discharge, allowing for continued use.

[0041] In related technologies, the battery casing includes a main body and a water-cooling plate, with the water-cooling plate fixed to the main body by applying adhesive. However, due to the long curing time and inconsistent adhesive thickness, this connection method not only complicates the assembly process but also results in poor thermal management efficiency.

[0042] Based on the above considerations, this application provides a battery housing, a battery, and an electrical device. The battery includes a battery housing and battery cells. The battery housing forms a receiving space and includes a body and a heat exchanger. The body includes a first metal layer and a second metal layer stacked together, and the body serves as the wall of the receiving space. The heat exchanger is welded to the second metal layer. The first metal layer is a first material, and the second metal layer and the heat exchanger are second materials. The battery cells are disposed in the receiving space. The first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchanger includes an aluminum heat exchanger; or the first metal layer includes an aluminum plate layer, the second metal layer includes a steel plate layer, and the heat exchanger includes a steel heat exchanger. The body has a first aluminum stripping area and also includes a support beam located within the receiving space and welded to the steel plate layer corresponding to the first aluminum stripping area. The battery housing can be used to install individual battery cells, improving their anti-interference capabilities, safety, and reliability. The heat exchanger can exchange heat with the battery cells inside the housing, further enhancing battery safety and reliability. The main body comprises a first metal layer and a second metal layer stacked together, allowing it to possess the characteristics of both layers. This increases strength while facilitating welding to the heat exchanger, simplifying assembly and enabling automated production. Welding also improves the connection stability between the heat exchanger and the main body, thereby enhancing the battery's thermal management efficiency and reliability. Furthermore, the main body serves as the wall of the containing space, with the heat exchanger welded to its second metal layer, facilitating heat exchange between the heat exchanger and the battery cells within the space, thus improving thermal management efficiency. Additionally, both the second metal layer and the heat exchanger are made of the same material, which facilitates welding, improving welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger and the main body, enhances the thermal management efficiency of the battery, and thus improves the reliability of the battery and the power-consuming device. When the first metal layer includes a steel plate layer and the second metal layer includes an aluminum plate layer, meaning the main body includes stacked steel and aluminum plate layers, the main body possesses not only the high strength and high melting point of steel but also the excellent electrical and thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the main body, thereby enhancing the reliability of the battery housing. When the second metal layer includes a steel plate layer, the first metal layer includes an aluminum plate layer, and the heat exchanger includes a steel heat exchanger, this configuration facilitates welding the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger. Welding the support beam to the steel plate layer strengthens the structure of the main body, thus enabling... Improving the structural stability of the battery box: The support beam is set within the accommodating space formed by the main body, which can limit the position of the battery cells within the accommodating space, thus improving the positional stability of the battery cells and consequently improving the overall stability of the battery; The support beam is welded to the steel plate layer corresponding to the first aluminum stripping area, that is, the welding area is the area on the main body where only the steel plate layer remains. When the aluminum plate layer is located on the side of the main body where the support beam is set, and the steel plate layer is located on the side of the main body away from the support beam, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam and the steel plate layer; When the steel plate layer is located on the side of the main body where the support beam is set, and the aluminum plate layer is located on the side of the main body away from the support beam, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0043] The battery housing, battery, and electrical device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0044] For ease of explanation, the following embodiments will be described using a vehicle 1000a as an example of an electrical device according to an embodiment of this application.

[0045] Referring to Figure 1, vehicle 1000a can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100a is installed inside vehicle 1000a, which can be located at the bottom, front, or rear of vehicle 1000a. Battery 100a can be used to power vehicle 1000a; for example, battery 100a can serve as the operating power source for vehicle 1000a. Vehicle 1000a may also include a controller 200a and a motor 300a. Controller 200a is used to control the battery 100a to supply power to motor 300a, for example, to meet the power needs of vehicle 1000a during startup, navigation, and driving.

[0046] In some embodiments of this application, the battery 100a can not only serve as the operating power source for the vehicle 1000a, but also as the driving power source for the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.

[0047] In some embodiments, battery 100a may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0048] The battery 100a mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0049] In this embodiment, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can also be a primary battery.

[0050] Battery cells include, but are not limited to, lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-metal hydride battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc.

[0051] In some embodiments, the battery 100a can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0052] In some embodiments, referring to FIG2, the battery 100a can be a battery pack, which includes a battery housing 10 and a battery cell 1, wherein the battery cell 1 or battery module is housed in the battery housing 10.

[0053] In some embodiments, the battery housing 10 may be part of the chassis structure of the vehicle 1000a. For example, a portion of the battery housing 10 may be at least a portion of the floor of the vehicle 1000a, or a portion of the battery housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000a.

[0054] In some embodiments, referring to Figure 2, in battery 100a, there can be multiple battery cells 1, which can be connected in series, parallel, or mixed. Mixed connection means that multiple battery cells 1 are connected in both series and parallel. Multiple battery cells 1 can be directly connected in series, parallel, or mixed together, and then the entire assembly of multiple battery cells 1 is housed within battery housing 10. Alternatively, battery 100a can also consist of multiple battery cells 1 first connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, which is then housed within battery housing 10. Battery 100a may also include other structures; for example, battery 100a may also include a busbar component for realizing electrical connection between multiple battery cells 1.

[0055] In some embodiments, as shown in FIG2, the battery 100a includes a battery housing 10 and a battery cell 1. The battery housing 10 forms a receiving space. As shown in FIGS. 3 and 4, the battery housing 10 includes a body 12 and a heat exchanger 13. The body 12 includes a first metal layer 1211 and a second metal layer 1212 stacked together, and the body 12 serves as the wall of the receiving space 101. The heat exchanger 13 is welded to the second metal layer 1212. The first metal layer 1211 is a first material, and the second metal layer 1212 and the heat exchanger 13 are... The second material is used; the battery cell 1 is disposed in the accommodating space 101; wherein, the first metal layer 1211 includes a steel plate layer, the second metal layer 1212 includes an aluminum plate layer, and the heat exchanger 13 includes an aluminum heat exchanger; or the second metal layer 1212 includes a steel plate layer, the first metal layer 1211 includes an aluminum plate layer, and the heat exchanger 13 includes a steel heat exchanger; wherein, the body 12 is provided with a first aluminum stripping area, and the body 12 also includes a support beam 122, the support beam 122 is located in the accommodating space 101, and is welded to the steel plate layer corresponding to the first aluminum stripping area.

[0056] The battery housing 10 provides space for the individual battery cells 1 and can have various structures and shapes. The main body 12 serves as the wall of the space 101, and the heat exchange component 13 is welded to the second metal layer 1212 of the main body 12, facilitating heat exchange between the heat exchange component 13 and the individual battery cells 1 within the space. Specifically, the aluminum heat exchange component 13 refers to a heat exchange component 13 made of aluminum-containing materials; the steel plate layer refers to a plate layer made of steel-containing materials; and the aluminum plate layer refers to a plate layer made of aluminum-containing materials. Specifically, the first aluminum-peeled area refers to the area on the main body 12 where only the steel plate layer remains, i.e., the welding area between the support beam 122 and the steel plate layer is located in the first aluminum-peeled area of ​​the main body 12. It should be noted that the steel plate layer can be either the first metal layer 1211 or the second metal layer 1212, and there is no specific limitation.

[0057] It should be noted that the specific shape of the body is not limited. For example, in some embodiments, as shown in Figure 2, the body 12 includes a lower housing 121, which forms a receiving space to accommodate the battery cell 1. In other embodiments, the body 12 can also be a cover or an upper housing covering the opening of the receiving space as a wall of the receiving space. That is, the heat exchanger 13 can be welded to the wall of the receiving space 101 (i.e., the second metal layer 1212 of the body 12). The heat exchanger 13 can be disposed in the lower housing, upper housing, or cover of the battery housing 10, etc., and is not specifically limited. The specific position of the heat exchanger 13 can be adjusted according to the usage requirements and the specific structural shape of the battery housing 10. Similarly, the specific structural shape of the battery housing 10 is not limited, and it can be, for example, a cylinder, a cuboid, etc.

[0058] The heat exchanger 13 is welded to the second metal layer 1212, which facilitates a fixed connection between the heat exchanger 13 and the body 12. The welding process can form a molten body, which, after solidification, can connect the heat exchanger 13 and the second metal layer 1212. This not only improves the stability between the heat exchanger 13 and the second metal layer 1212, but also improves the sealing performance between them, thereby enhancing the reliability of the battery housing 10 and the battery 100a.

[0059] In some embodiments, the heat exchanger 13 and the second metal layer 1212 can be connected by friction stir welding (FSW), furnace brazing or laser welding.

[0060] Among them, FSW heats the joint surface through stirring and rotational friction, resulting in relatively uniform energy input and applicability to a variety of materials; moreover, FSW is low in cost, high in production efficiency, and environmentally friendly; FSW controls the welding effect by adjusting parameters such as rotational speed and axial force, making it less prone to welding defects and resulting in high welding strength.

[0061] Furnace brazing is a metal joining process that uses filler metal (switch filler metal) to join two or more metal parts together at a high temperature. A key characteristic of brazing is that it does not melt the workpiece material itself; instead, the bond between the metals is achieved through the melting of the filler metal. The melting point of the brazing filler metal is usually lower than that of the workpieces being joined. The furnace brazing process typically includes steps such as surface preparation, filler metal selection, assembly, heating, holding, and cooling. Specifically, firstly, the welding area of ​​the workpiece needs to be cleaned to remove oil, rust, and other impurities to ensure the brazing filler metal can effectively wet the metal surface. Next, a suitable brazing filler metal is selected based on the workpiece material and required mechanical properties; the composition of the filler metal affects its melting point, fluidity, strength, and corrosion resistance. Next, the workpieces to be welded are placed in the brazing furnace or fixed using clamps, ensuring the brazing filler metal is correctly positioned at the joint to complete assembly. Next, the workpieces and brazing filler metal are placed in the brazing furnace and heated to a temperature slightly above the melting point of the filler metal but below the melting point of the workpiece to achieve melting and flow of the filler metal. Finally, after reaching the required temperature, it is held for a certain time to ensure the filler metal fully wets the workpiece surface and fills the joint, and then slowly cooled to prevent thermal stress in the workpiece. Furnace brazing can join different types of metals without damaging the workpiece and can process multiple workpieces at the same time, making it suitable for mass production. Furnace brazing can achieve high-quality joints, making it particularly suitable for applications requiring high strength and sealing, and it is relatively inexpensive.

[0062] In some embodiments, when using furnace brazing to achieve the soldering setup, 4-series solder wires or solders can be selected. These solders are widely used in electronic connections requiring high thermal and electrical conductivity due to their high electrical conductivity and good mechanical properties. A typical 4-series solder composition is 40% silver, 30% copper, and 30% tin, and this ratio can be adjusted according to different application requirements. For example, some 4-series solders may have trace amounts of other elements, such as phosphorus (P), antimony (Sb), or cadmium (Cd), added to improve solder wettability, wetting speed, or other properties.

[0063] Laser welding is a process that uses a high-energy-density laser beam as a heat source to join metals or other materials. This technology offers many advantages, including high precision, high speed, low deformation, and the ability to weld on a wide variety of materials, including carbon steel, stainless steel, aluminum, copper, titanium, and their alloys. The basic process of laser welding typically includes focusing the laser beam, material melting and evaporation, filler material, cooling, and solidification. Specifically, the laser beam emitted by the laser is focused onto a very small spot through a lens or mirror to achieve high energy density, allowing the laser beam to rapidly heat the material surface to a molten state. Further, the focused laser beam irradiates the workpiece, causing localized melting or even evaporation of the material, forming pores. As the laser beam moves, the molten material forms a weld pool. Further, in some laser welding processes, filler material may be added to help form the weld. The filler material is melted and mixed with the base material to strengthen the weld joint. Finally, after the laser beam is removed, the weld pool begins to cool and gradually solidify, forming the weld. The cooling process can be controlled or natural, depending on the welding process and the characteristics of the workpiece. Common types of laser welding include conduction laser welding, penetration laser welding, deep penetration welding, and surface welding. Laser welding enables non-contact processing, reduces mechanical stress and deformation of workpieces, and has a high welding speed, making it suitable for automated production lines. Furthermore, laser welding can achieve welding in various positions such as flat welding, vertical welding, horizontal welding, and overhead welding, and the welding process is controllable, making it easy to achieve process monitoring and quality control. It can achieve precision welding and is suitable for processing micro parts and complex structures.

[0064] The heat exchanger 13 is a component or assembly for heat exchange. It may include a multi-channel structure that utilizes a liquid or gaseous medium for heat exchange, including a multi-channel or finned structure capable of active or passive heat exchange. The heat exchanger 13 may also be configured to regulate the temperature of the battery 100a by controlling the temperature of the heat exchanger 13 itself or the medium contained within it. The heat exchanger 13 can heat the battery 100a or cool it down based on actual needs. The heat exchanger 13 may be made of a material with good thermal conductivity, such as aluminum or an aluminum alloy. The shape of the heat exchanger 13 can be designed according to its placement location, and may be a shape suitable for sufficient heat exchange, such as a flat, elongated cuboid.

[0065] The first metal layer 1211 and the second metal layer 1212 can be combined into one piece by explosive composite method, such as explosive rolling composite, rolling composite, etc., to form a composite plate as the body 12. Of course, in some embodiments, the first metal layer 1211 and the second metal layer 1212 can also be stacked in other ways, which are not limited.

[0066] The first material and the second material are different in composition, and their melting points differ significantly, for example, the difference is greater than or equal to 200°C, making welding between the two materials difficult. By stacking a second metal layer 1212 made of the second material on the first metal layer 1211 made of the first material, the second metal layer 1212 can be easily welded to the heat exchanger 13, which is also made of the second material, thereby achieving welding between the heat exchanger 13 and the body 12.

[0067] The battery housing 10 of this embodiment can be used to install battery cells 1, which can improve the anti-interference ability of battery cells 1 and improve the safety and reliability of battery cells 1; the heat exchanger 13 can exchange heat with the battery cells 1 inside the battery housing 10, improving the safety and reliability of battery 100a; the body 12 includes a first metal layer 1211 and a second metal layer 1212 stacked together, which allows the body 12 to have the characteristics of both the first metal layer 1211 and the second metal layer 1212, which can improve the strength of the body 12 while facilitating welding connection with the heat exchanger 13, and simplifying the assembly. The assembly process facilitates automated production, and welding improves the connection stability between the heat exchanger 13 and the body 12, thereby improving the thermal management efficiency and reliability of the battery 100a. Furthermore, since the body 12 serves as the wall of the accommodating space 101, the second metal layer 1212 of the heat exchanger 13 is welded to the body 12, which facilitates heat exchange between the heat exchanger 13 and the battery cell 1 within the accommodating space 101, thereby improving the thermal management efficiency of the battery 100a. Furthermore, since the second metal layer 1212 and the heat exchanger 13 are both made of the same material, welding is easier and improves welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger 13 and the body 12, enhances the thermal management efficiency of the battery 100a, and thus improves the reliability of the battery 100a and the power supply device. When the first metal layer 1211 includes a steel plate layer and the second metal layer 1212 includes an aluminum plate layer, that is, the body 12 includes a stacked steel plate layer and an aluminum plate layer, the body 12 not only possesses the high strength and high melting point of steel, but also the excellent electrical conductivity, thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the body 12, and thus improves the reliability of the battery housing 10. When the second metal layer 1212 includes a steel plate layer, the first metal layer 1211 includes an aluminum plate layer, and the heat exchanger 13 includes a steel heat exchanger, this configuration facilitates the welding of the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger 13. Welding the support beam to the steel plate layer strengthens the structure of the body 12, thus improving the reliability of the battery housing. 10. Structural stability: The support beam 122 is set within the accommodating space 101 formed by the body 12. The support beam 122 can limit the position of the battery cell 1 within the accommodating space 101, thus improving the positional stability of the battery cell 1 and consequently improving the overall stability of the battery 100a. The support beam 122 is welded to the steel plate layer corresponding to the first aluminum stripping area, i.e., the welding area is the area on the body 12 where only the steel plate layer remains. When the aluminum plate layer is located on the side of the body 12 where the support beam 122 is set, and the steel plate layer is located on the side of the body 12 away from the support beam 122, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam 122 and the steel plate layer. When the steel plate layer is located on the side of the body 12 where the support beam 122 is set, and the aluminum plate layer is located on the side of the body 12 away from the support beam 122, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0068] In some embodiments, a protective layer may also be provided on the heat exchanger 13. This protective layer may include at least one of an insulation layer, a protective layer, a buffer layer, and a sealing layer.

[0069] In some embodiments, in order to increase the structural strength of the body 12, the support beam 122 may be configured as a steel support beam 122.

[0070] In some embodiments, as shown in FIG3, the first metal layer 1211 is disposed toward the receiving space 101.

[0071] In some application scenarios, the body 12 includes a first metal layer 1211 and a second metal layer 1212 stacked together. The first metal layer 1211 is disposed on the side of the body 12 close to the receiving space 101 and facing the receiving space 101.

[0072] The first metal layer 1211 is disposed facing the receiving space 101, that is, the second metal layer 1212 is disposed on the side of the body 12 away from the receiving space 101, which facilitates the welding of the second metal layer 1212 to the heat exchanger 13 located outside the receiving space 101, thereby improving assembly convenience; and by disposing of the heat exchanger 13 outside the receiving space 101, the risk of heat exchange medium in the heat exchanger 13 leaking into the receiving space 101 and affecting the battery cell 1 can be reduced, thus further improving the reliability of the battery 100a.

[0073] Of course, in some embodiments, the first metal layer can also be disposed away from the receiving space, that is, the second metal layer is disposed towards the receiving space, the first metal layer is located outside the receiving space, and the heat exchange component is welded to the side of the second metal layer away from the first metal layer. That is, the heat exchange component can be welded into the receiving space formed by the body, thereby improving the heat exchange efficiency between the heat exchange component and the battery cell in the receiving space. Moreover, being disposed in the receiving space facilitates the improvement of the reliability and anti-interference of the aluminum heat exchange component.

[0074] In some embodiments, as shown in Figures 4 and 5, a limiting portion 30 is formed on the side of the second metal layer 1212 facing the heat exchanger 13, and the heat exchanger 13 is at least partially embedded in the limiting portion 30.

[0075] The second metal layer 1212 forms a limiting part 30 on the side facing the heat exchanger 13, which facilitates the heat exchanger 13 to be embedded in the limiting part 30. The limiting part 30 can limit the heat exchanger 13, thereby improving the structural stability of the heat exchanger 13 and improving the reliability of the body 12, the battery box 10 and the battery 100a.

[0076] In some embodiments, the limiting part 30 and the second metal layer 1212 are integrally formed, such as by stamping, which simplifies the production and assembly process; the limiting part 30 is formed from the second metal layer 1212, which reduces the number of parts and lowers the assembly complexity. Of course, in other embodiments, the limiting part can be fixed to the side of the second metal layer facing the heat exchanger by welding or bonding.

[0077] It should be noted that the number and arrangement of the limiting parts 30 are not limited. The arrangement or number of the limiting parts 30 can be set based on the shape and structure of the heat exchanger 13, as long as the limiting of the heat exchanger 13 can be achieved. For example, the limiting of the heat exchanger 13 can be achieved by snap-fit ​​limiting.

[0078] In some embodiments, as shown in Figures 4 and 5, the limiting portion 30 includes a protrusion.

[0079] The limiting part 30 includes a protrusion. The protrusion has a simple structure and facilitates the limiting of the heat exchanger 13. The protrusion, being a limiting part, is located on the side of the second metal layer 1212 facing the heat exchanger 13. Therefore, the protrusion also strengthens the second metal layer 1212, thus reinforcing the body 12 including the second metal layer 1212. This arrangement allows the limiting part 30 to both limit the heat exchanger 13 and strengthen the body 12 including the second metal layer 12. The structure is simple, reduces the manufacturing and assembly process of the body 12, and improves structural stability.

[0080] Specifically, the protrusions can increase local stiffness, specifically increasing the local cross-sectional stiffness of the bottom of the body 12 (i.e., the bottom of the receiving space 101), making this area less prone to bending deformation. For example, when the bottom of the body 12 is subjected to external pressure, the protrusions can more effectively resist compression, thus protecting the body 12 from damage due to excessive deformation. Furthermore, the protrusions can alter the stress distribution, allowing pressure to concentrate at the top of the protrusions, reducing stress in other areas of the bottom of the body 12, thereby reducing the risk of material fatigue and breakage. Moreover, the protrusions can enhance the compressive strength of the body 12, enabling the bottom of the body 12 to withstand greater compressive loads, helping to delay the occurrence of local buckling instability. Buckling refers to the phenomenon of a material losing stability and suddenly deforming under compressive loads; the presence of the protrusions can improve the bottom of the body 12's resistance to buckling. Therefore, the protrusions can improve the overall stability and durability of the body 12.

[0081] In one application scenario, the limiting part 30 includes multiple protrusions, and a limiting groove is formed between the multiple protrusions. The limiting groove can be locked in place with the heat exchanger 13. In another application scenario, the limiting part includes one protrusion, and the heat exchanger forms a limiting groove. The limiting groove and the protrusion can be locked in place. Specifically, the number, shape, arrangement, and limiting method of the protrusions are not limited. As long as the limiting of the heat exchanger is achieved, the protrusions can also be used to strengthen the structure of the main body and improve the overall stability of the lower housing.

[0082] In one application scenario, protrusions can be formed by stamping the second metal layer 1212 toward the heat exchanger 13, etc., without being specifically limited.

[0083] In one application scenario, a protrusion can be formed on the side of the body 12 facing the heat exchanger 13 (for example, the body 12 is formed by combining the first metal layer 1211 and the second metal layer 1212 to form a composite plate, and then the protrusion is formed by stamping), so as to limit the heat exchanger 13 and strengthen the structure of the body 12.

[0084] In some embodiments, the second metal layer 1212 is disposed at least at the bottom of the receiving space 101.

[0085] In some applications, the first metal layer 1211 can be first stamped into a basin to form a steel body and a receiving space 101. Then, a second metal layer 1212 is cold-rolled at the bottom of the receiving space 101 to form a body 12 including the stacked first metal layer 1211 and the second metal layer 1212. This allows the second metal layer 1212 to be positioned at the bottom of the receiving space 101, facilitating the welding of the heat exchanger 13 to the second metal layer 1212, thus achieving a fixed connection between the heat exchanger 13 and the body 12. It should be noted that the second metal layer 1212 can be located on the side of the body 12 closer to the receiving space 101 or on the side of the body 12 away from the receiving space 101; the specific location is not limited.

[0086] In some embodiments, a first metal layer and a second metal layer stacked together form a composite plate, and the composite plate is stamped into a basin to form a basin-shaped body and a receiving space. The second metal layer is disposed at the bottom and side of the receiving space.

[0087] In some embodiments, the composite plate may first undergo partial aluminum stripping treatment in the surrounding area, and then be stamped into a basin to form a basin-shaped body and a receiving space, so that the second metal layer is disposed at the bottom of the receiving space.

[0088] In some embodiments, the heat exchanger 13 completely covers the bottom of the body 12, that is, the projection of the heat exchanger 13 on the plane where the bottom of the body 12 is located completely covers the bottom of the body 12, which can increase the connection area between the heat exchanger 13 and the second metal layer 1212 of the body 12 and improve the heat exchange effect.

[0089] The heat exchanger 13 is located at the bottom of the accommodating space 101. In one application scenario, the heat exchanger can be located on the inner side of the bottom of the accommodating space, that is, on the side of the main body close to the accommodating space. In another application scenario, as shown in Figure 4, the heat exchanger 13 can also be located on the outer side of the bottom of the accommodating space 101, that is, on the side of the main body 12 away from the accommodating space 101. The specific location is not limited.

[0090] The second metal layer 1212 is disposed at least at the bottom of the accommodating space 101, which facilitates the welding of the heat exchanger 13 to the second metal layer 1212. This improves the uniformity and reliability of the welding connection between the heat exchanger 13 and the second metal layer 1212, and also facilitates the placement of the heat exchanger 13 at the bottom of the accommodating space 101, thereby increasing the welding area between the heat exchanger 13 and the body 12. Therefore, it can improve the heat exchange efficiency and connection stability between the heat exchanger 13 and the battery cell 1 in the accommodating space 101, and improve the reliability of the battery box 10 and the battery 100a.

[0091] In some embodiments, the body 12 forms a receiving space 101 with an opening, and the battery housing 10 further includes a cover 11, which is disposed on the body 12 to close the opening.

[0092] The main body 12 forms a receiving space 101 with an opening, through which the battery cell 1 can be placed in the receiving space 101; furthermore, the battery box 10 also includes a cover 11, which is placed on the main body 12 to close the opening, thereby improving the anti-interference ability of the battery cell 1 in the receiving space 101 and improving the protection of the battery cell 1.

[0093] In one application scenario, the cover 11 and the body 12 overlap, and together they define a space for accommodating the battery cell 1. The body 12 can be a hollow structure with one open end, and the cover 11 can be a plate-like structure. The cover 11 covers the open side of the body 12, so that the cover 11 and the body 12 together define the accommodating space 101. In another application scenario, as shown in Figure 2, both the cover 11 and the body 12 can be hollow structures with one open end, and the open side of the cover 11 covers the open side of the body 12. Of course, the battery box 10 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0094] Of course, in some embodiments, the second metal layer may be disposed only on the side of the accommodating space, and the heat exchanger is welded to the second metal layer to achieve a fixed connection with the body.

[0095] In some embodiments, the accommodating space includes a plurality of spaced subspaces, and the body includes a plurality of heat exchange elements. The plurality of heat exchange elements can be respectively disposed corresponding to the bottom of the plurality of subspaces, that is, the plurality of heat exchange elements can be respectively welded to the second metal layer of the body corresponding to the bottom of the plurality of subspaces, and a single heat exchange element is used to perform heat exchange with the corresponding subspace.

[0096] In some embodiments, as shown in FIG3, an aluminum plate layer is at least disposed at the bottom of the receiving space 101, and a first aluminum stripping area is at least partially located at the bottom of the receiving space 101.

[0097] The first aluminum stripping area is located at least partially at the bottom of the receiving space 101, that is, the welding area is located at least partially at the bottom of the receiving space 101 (for example, in some application scenarios, the welding area may also be located on the side and bottom of the receiving space 101). This arrangement can increase the welding area between the support beam 122 and the first metal layer 1211, which facilitates the fixing of the support beam 122 and thus improves the structural stability of the support beam 122.

[0098] In some embodiments, other components on which the battery 100a is disposed may also be supported on the support beam 122.

[0099] In some embodiments, the first aluminum stripping area may be located only on the side of the receiving space, that is, the welding area is located only on the side of the receiving space, and the specific location is not limited.

[0100] In some embodiments, the body 12 may include a plurality of support beams 122 located within the receiving space 101 to further enhance the limiting effect on the battery cell 1 and improve the structural reinforcement effect on the body 12. The number and arrangement of the support beams 122 can be adjusted as needed, and are not specifically limited.

[0101] In some embodiments, the support beam 122 can also be fixedly connected to the body 12 by means of pasting, snap-fitting, bolting, etc., and the specific method is not limited.

[0102] In some embodiments, the support beam 122 can be integrally formed with the body 12 through processes such as extrusion molding, and the specific details are not limited.

[0103] In some embodiments, the support beam 122 may include at least one of an expansion beam, a central crossbeam, or a side beam. The side of the body 12 near the receiving space 101 includes an end region, a side region, and a central region enclosed by the end region and the side region. The expansion beam is connected to the end region of the body 12, and the central region is used to form the receiving space 101. The central crossbeam may be welded to the central region of the body 12 near the receiving space 101, and both ends of the central crossbeam may be connected to the side beam, for example, by welding, riveting, fastening, gluing, etc.

[0104] The central crossbeam enhances the support provided by the supporting beams to the main body 12, thereby increasing the structural strength of the main body 12 and the battery box 10. Furthermore, it divides the accommodating space into multiple sub-spaces, reducing interference between individual battery cells 1 located in different sub-spaces and improving the containment function of the battery cells 1. Therefore, the central crossbeam improves the reliability of the battery box 10 and the battery 100a.

[0105] The expansion beam and the frame beam can serve as the main energy-absorbing components of the battery box 10, which is crucial for the stable and reliable operation of the battery box 10 and the battery 100a.

[0106] In some embodiments, the number, shape, or arrangement of the central crossbeams is not limited and can be adjusted accordingly based on application needs.

[0107] In some embodiments, as shown in Figures 4, 5, and 6, an aluminum plate layer is also disposed on the side of the receiving space 101, and the body 12 is provided with a second aluminum stripping area, which is at least partially located on the side of the receiving space 101. The body 12 also includes a suspension beam 123, which is located on the side of the body 12 away from the receiving space 101 and is welded to the steel plate layer corresponding to the second aluminum stripping area.

[0108] Specifically, the second aluminum-stripping area refers to the area on the body 12 where only the steel plate layer remains, i.e., the welding area between the suspension beam 123 and the steel plate layer is located in the second aluminum-stripping area of ​​the body 12. It should be noted that the steel plate layer can be either the first metal layer 1211 or the second metal layer 1212, and there is no specific limitation.

[0109] To increase the structural strength of the main body 12, the suspension beam 123 can be made of steel. The suspension beam 123 facilitates connection with external components to fix the main body 12, thereby improving the positional stability of the battery box 10. Furthermore, the suspension beam 123 is located on the side of the main body 12 away from the receiving space 101, that is, the suspension beam 123 is located outside the receiving space 101, which facilitates the welding of the suspension beam 123 to the main body 12. Furthermore, the steel plate layer corresponding to the second aluminum stripping area of ​​the main body 12 is directly welded to the suspension beam 123, which can increase the convenience and reliability of welding between the suspension beam 123 and the steel plate layer. The suspension beam 123 is welded at least on the side of the receiving space 101, which facilitates the fixing of the main body 12 through the suspension beam 123. Furthermore, the suspension beam 123 is welded to the steel plate layer corresponding to the second aluminum stripping area, that is, the welding area is the area on the main body 12 where only the steel plate layer remains. Since the melting point of steel is higher than that of aluminum, setting the second aluminum stripping area as the welding area can reduce the problem caused by the aluminum plate layer melting before the steel plate layer during welding.

[0110] Furthermore, in some application scenarios, when the aluminum plate layer is located on the side of the body 12 where the suspension beam 123 is set, and the steel plate layer is located on the side of the body 12 away from the side where the suspension beam 123 is set, the setting of the second aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the suspension beam 123 and the steel plate layer.

[0111] In some embodiments, the second aluminum stripping area may also be located only at the bottom of the receiving space, that is, the welding area between the suspension beam and the steel plate layer is located only at the bottom of the receiving space, without being specifically limited.

[0112] In some embodiments, the body 12 may include a plurality of suspension beams 123 located on the side of the receiving space 101, which can improve the convenience of fixing the body 12 by means of the suspension beams 123. The number and arrangement of the suspension beams 123 can be adjusted as needed, and no specific limitation is made.

[0113] In some embodiments, the suspension beam can also be fixedly connected to the body 12 by means of pasting, snap-fitting, bolting, etc., and the specific method is not limited.

[0114] In some embodiments, the suspension beam may be integrally formed with the main body through processes such as extrusion molding, and the specific details are not limited.

[0115] In some embodiments, the body 12 further includes a bottom protective plate, which is stacked on the side of the heat exchanger 13 facing away from the second metal layer 1212. This facilitates improved impact resistance of the body 12 and the heat exchanger 13, and enables protection of the body 12, the heat exchanger 13, and the battery housing 10.

[0116] In some embodiments, the second metal layer 1212 is disposed away from the receiving space 101, the heat exchanger 13 is welded to the second metal layer 1212 of the body 12, and the bottom guard plate is stacked on the side of the heat exchanger 13 away from the second metal layer 1212. This allows the bottom guard plate to be disposed outside the receiving space 101 (e.g., at the bottom outside the receiving space 101), improving the protection and impact resistance of the bottom guard plate for the battery box 10. In other embodiments, the bottom guard plate may also be disposed at the bottom inside the receiving space 101, and the specific placement is not limited.

[0117] In some embodiments, the bottom cover plate is fixedly connected to the bottom of the body 12, thereby achieving a stacked arrangement on the side of the heat exchanger 13 opposite to the second metal layer 1212. In other embodiments, the bottom cover plate can be directly fixedly connected to the side of the heat exchanger 13 opposite to the second metal layer. It should be noted that the fixing method of the bottom cover plate is not limited. For example, it can be connected to the bottom of the body 12 and / or the side of the heat exchanger 13 opposite to the second metal layer by means of adhesive, welding, bolt fixing, etc. It can also be a detachable connection method such as snap-fit, which facilitates the maintenance and replacement of the bottom cover plate or the heat exchanger 13.

[0118] In some embodiments, the bottom cover may cover the entire bottom of the body 12. For example, the side edges of the bottom cover are flush with the side edges of the bottom of the body 12; in some embodiments, the projection of the bottom cover on the bottom of the body 12 overlaps the projection of the heat exchanger 13 on the bottom of the body 12.

[0119] In some embodiments, the body 12 further includes a pressure sensor disposed on the side of the underbody shield away from the heat exchanger 13 or on the side of the underbody shield close to the heat exchanger 13. In one application scenario, the electrical device is a vehicle 1000a. The pressure sensor can provide quantifiable pressure detection for the bottom safety of the vehicle 1000a. When encountering bottom scraping, impact, or other conditions, the pressure sensor has the function of monitoring and feedback on the applied load, and can monitor and determine the damage. This can assist the driver in making reasonable judgments on the handling plan of the vehicle 1000a and the body 12, thereby improving the safety of the vehicle in dealing with bottom safety conditions.

[0120] In some embodiments, the bottom cover includes an upper bottom cover and a lower bottom cover, with the pressure sensor disposed between the upper bottom cover and the lower bottom cover. Thus, the bottom cover and the pressure sensor form a sandwich structure, with the pressure sensor being covered by both the upper and lower bottom cover, preventing it from being exposed and damaged by collisions with other objects.

[0121] In some embodiments, an adhesive layer can be provided between the upper and lower plates of the bottom guard plate to improve the sealing effect and reduce the risk of the pressure sensor coming into contact with external interference factors such as liquid.

[0122] In some embodiments, the first metal layer 1211 and the second metal layer 1212 are cold-rolled structures.

[0123] Specifically, the first metal layer 1211 and the second metal layer 1212 are stacked by cold rolling. Cold rolling is a metal processing technology that facilitates the joining of dissimilar materials. Typically, metal materials are compressed at room temperature by a pair of rollers to change their shape and size. This process results in parts with high surface finish, and cold rolling can directly shape metal sheets or bars, reducing steps such as cutting and welding. Therefore, it has high material utilization, low waste, high automation, and fast production speed, making it suitable for large-scale production and reducing production costs and time.

[0124] In some embodiments, the heat exchanger 13 includes a serpentine aluminum tube.

[0125] The heat exchanger 13 includes a serpentine aluminum tube, which facilitates welding to the second metal layer 1212 of the body 12, facilitates fixing and limiting, and can reduce production costs.

[0126] In some embodiments, the heat exchanger may also include a water-cooled plate, etc., and there is no specific limitation.

[0127] In some embodiments, the thickness of the first metal layer 1211 is 0.3 to 2.3 mm. This configuration can improve the strength of the body 12 to meet various working conditions while reducing the weight of the body 12 and facilitating processing.

[0128] In some embodiments, the thickness of the first metal layer 1211 may also be 0.3-2mm, 0.4-1mm or 0.8-2mm, etc. For example, the thickness of the first metal layer 1211 may be 0.3mm, 0.4mm, 0.45mm, 0.5mm, 0.52mm, 0.7mm, 0.9mm, 1mm, 1.2mm, 1.5mm, 1.56mm, 1.7mm, 1.9mm, 2mm, 2.1mm or 2.3mm, etc.

[0129] In some embodiments, the thickness of the first metal layer 1211 is 0.5 to 2.0 mm.

[0130] In some embodiments, the thickness of the first metal layer 1211 may also be 0.9-2 mm, 0.5-1 mm or 1-2 mm, etc. For example, the thickness of the first metal layer 1211 may be 0.5 mm, 0.58 mm, 0.6 mm, 0.95 mm, 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 1.95 mm or 2 mm, etc.

[0131] The type of material included in the first metal layer 1211 is not limited. For example, the first metal layer may include DC01 steel, a typical cold-rolled low-carbon steel with good formability and weldability. Its carbon content is low, generally not exceeding 0.12%, which gives it good plasticity and toughness. The yield strength of DC01 steel is approximately 275 MPa, and its tensile strength is approximately 370-500 MPa. Due to its excellent cold working ability and cost-effectiveness, DC01 steel is widely used in industrial fields requiring cold forming.

[0132] For example, the first metal layer 1211 may include DC56 steel, which is also a cold-rolled low-carbon steel, but with a slightly higher carbon content, typically between 0.05% and 0.15%. This steel also has good formability and weldability, but due to the increased carbon content, its strength is slightly higher than that of DC01 steel. The yield strength of DC56 steel is typically around 370 MPa, and its tensile strength is approximately 470-630 MPa. DC56 steel is commonly used in applications requiring higher strength and hardness.

[0133] In some embodiments, the thickness of the second metal layer 1212 is 0.03 mm to 1.3 mm. This arrangement facilitates welding between the heat exchanger 13 and the second metal layer 1212.

[0134] In some embodiments, the thickness of the second metal layer 1212 may also be 0.03-1mm, 0.05-1mm or 1-1.3mm, etc. For example, the thickness of the second metal layer 1212 may be 0.03mm, 0.05mm, 0.06mm, 0.1mm, 0.25mm, 0.35mm, 0.4mm, 0.6mm, 1mm, 1.15mm, 1.12mm or 1.3mm, etc.

[0135] In some embodiments, the thickness of the second metal layer 1212 is 0.05 mm to 1.0 mm.

[0136] In some embodiments, the thickness of the second metal layer 1212 may also be 0.06-1mm, 0.07-1mm, or 0.05-0.9mm, for example, the thickness of the second metal layer 1212 may be 0.05mm, 0.08mm, 0.2mm, 0.395mm, 0.5mm, 0.55mm, 0.65mm, 0.71mm, 0.8mm, 0.95mm, or 1mm, etc.

[0137] The type of material included in the second metal layer 1212 is not limited. For example, the second metal layer 1212 may include 1050 aluminum, whose main alloying element is aluminum, containing trace amounts of impurities such as iron and silicon. Its aluminum content is at least 99.5%, conforming to the standards of the Aluminum Association (AA), and belongs to the 1xxx series aluminum alloys. 1050 aluminum has good electrical and thermal conductivity; its electrical conductivity is second only to copper and silver, while its thermal conductivity is better than most other metals. Therefore, it is often used in products such as wires and cables, radiators, and conductive supports. 1050 aluminum also has good machinability and weldability, and can be processed into various shapes through extrusion, rolling, casting, etc. In addition, it also has good corrosion resistance, remaining stable in most environments and not easily rusting.

[0138] For example, the second metal layer 1212 may include 3-series aluminum, which is an aluminum alloy with manganese as the main alloying element. A typical example is 3003 aluminum, in which the manganese content is about 1.0-1.5%. This alloy has good corrosion resistance, machinability, and weldability; compared with pure aluminum, the strength of 3-series aluminum alloys is improved; and the addition of manganese can improve the corrosion resistance of aluminum alloys, enabling them to resist corrosion from the atmosphere, fresh water, and certain chemical media; 3-series aluminum alloys are easy to process and can be made into various profiles through rolling, extrusion, forging, and other processes; 3-series aluminum alloys have good weldability and can be welded using various methods, such as gas shielded welding, resistance welding, and spot welding.

[0139] In some embodiments, the battery housing 10 includes a body 12 and a heat exchanger 13. The body 12 includes a first metal layer 1211 and a second metal layer 1212 stacked together. The heat exchanger 13 is welded to the second metal layer 1212. The first metal layer 1211 is a first material, and the second metal layer 1212 and the heat exchanger 13 are second materials. The body 12 serves as the wall of the accommodating space 101, which is used to accommodate the battery cell 1. The first metal layer 1211 includes a steel plate layer, the second metal layer 1212 includes an aluminum plate layer, and the heat exchanger 13 includes an aluminum heat exchanger. Alternatively, the second metal layer 1212 includes a steel plate layer, the first metal layer 1211 includes an aluminum plate layer, and the heat exchanger 13 includes a steel heat exchanger. The body 12 is provided with a first aluminum stripping area. The body 12 also includes a support beam 122 located within the accommodating space 101 and welded to the steel plate layer corresponding to the first aluminum stripping area.

[0140] The battery housing 10 of this embodiment can be used to install battery cells 1, which can improve the anti-interference ability of battery cells 1 and improve the safety and reliability of battery cells 1; the heat exchanger 13 can exchange heat with the battery cells 1 inside the battery housing 10, improving the safety and reliability of battery 100a; the body 12 includes a first metal layer 1211 and a second metal layer 1212 stacked together, which allows the body 12 to have the characteristics of both the first metal layer 1211 and the second metal layer 1212, which can improve the strength of the body 12 while facilitating welding connection with the heat exchanger 13, and simplifying the assembly. The assembly process facilitates automated production, and welding improves the connection stability between the heat exchanger 13 and the body 12, thereby improving the thermal management efficiency and reliability of the battery 100a. Furthermore, since the body 12 serves as the wall of the accommodating space 101, the second metal layer 1212 of the heat exchanger 13 is welded to the body 12, which facilitates heat exchange between the heat exchanger 13 and the battery cell 1 within the accommodating space 101, thereby improving the thermal management efficiency of the battery 100a. Furthermore, since the second metal layer 1212 and the heat exchanger 13 are both made of the same material, welding is easier and improves welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger 13 and the body 12, enhances the thermal management efficiency of the battery 100a, and thus improves the reliability of the battery 100a and the power supply device. When the first metal layer 1211 includes a steel plate layer and the second metal layer 1212 includes an aluminum plate layer, that is, the body 12 includes a stacked steel plate layer and an aluminum plate layer, the body 12 not only possesses the high strength and high melting point of steel, but also the excellent electrical conductivity, thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the body 12, and thus improves the reliability of the battery housing 10. When the second metal layer 1212 includes a steel plate layer, the first metal layer 1211 includes an aluminum plate layer, and the heat exchanger 13 includes a steel heat exchanger, this configuration facilitates the welding of the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger 13. Welding the support beam to the steel plate layer strengthens the structure of the body 12, thus improving the reliability of the battery housing. 10. Structural stability: The support beam 122 is set within the accommodating space 101 formed by the body 12. The support beam 122 can limit the position of the battery cell 1 within the accommodating space 101, thus improving the positional stability of the battery cell 1 and consequently improving the overall stability of the battery 100a. The support beam 122 is welded to the steel plate layer corresponding to the first aluminum stripping area, i.e., the welding area is the area on the body 12 where only the steel plate layer remains. When the aluminum plate layer is located on the side of the body 12 where the support beam 122 is set, and the steel plate layer is located on the side of the body 12 away from the support beam 122, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam 122 and the steel plate layer. When the steel plate layer is located on the side of the body 12 where the support beam 122 is set, and the aluminum plate layer is located on the side of the body 12 away from the support beam 122, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0141] In some embodiments, the electrical device includes the battery 100a described above. Based on this, the battery housing 10 of this embodiment can be used to install individual battery cells 1, improving the anti-interference capability of the individual battery cells 1 and enhancing their safety and reliability; the heat exchanger 13 can exchange heat with the individual battery cells 1 within the battery housing 10, improving the safety and reliability of the battery 100a; the body 12 includes a first metal layer 1211 and a second metal layer 1212 stacked together, enabling the body 12 to possess the characteristics of both the first metal layer 1211 and the second metal layer 1212, thus improving the body 12's strength while facilitating welding connection with the heat exchanger 13, and simplifying the connection. The assembly process facilitates automated production, and welding improves the connection stability between the heat exchanger 13 and the body 12, thereby improving the thermal management efficiency and reliability of the battery 100a. Furthermore, since the body 12 serves as the wall of the accommodating space 101, the second metal layer 1212 of the heat exchanger 13 is welded to the body 12, which facilitates heat exchange between the heat exchanger 13 and the battery cell 1 within the accommodating space 101, thereby improving the thermal management efficiency of the battery 100a. Furthermore, since the second metal layer 1212 and the heat exchanger 13 are both made of the same material, welding is easier and improves welding quality and efficiency.Therefore, this embodiment simplifies the assembly process, facilitates automated production, improves the stability between the heat exchanger 13 and the body 12, enhances the thermal management efficiency of the battery 100a, and thus improves the reliability of the battery 100a and the power supply device. When the first metal layer 1211 includes a steel plate layer and the second metal layer 1212 includes an aluminum plate layer, that is, the body 12 includes a stacked steel plate layer and an aluminum plate layer, the body 12 not only possesses the high strength and high melting point of steel, but also the excellent electrical conductivity, thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration improves the reliability of the body 12, and thus improves the reliability of the battery housing 10. When the second metal layer 1212 includes a steel plate layer, the first metal layer 1211 includes an aluminum plate layer, and the heat exchanger 13 includes a steel heat exchanger, this configuration facilitates the welding of the steel heat exchanger to the steel plate layer, and the steel heat exchanger improves the structural reliability of the heat exchanger 13. Welding the support beam to the steel plate layer strengthens the structure of the body 12, thus improving the reliability of the battery housing. 10. Structural stability: The support beam 122 is set within the accommodating space 101 formed by the body 12. The support beam 122 can limit the position of the battery cell 1 within the accommodating space 101, thus improving the positional stability of the battery cell 1 and consequently improving the overall stability of the battery 100a. The support beam 122 is welded to the steel plate layer corresponding to the first aluminum stripping area, i.e., the welding area is the area on the body 12 where only the steel plate layer remains. When the aluminum plate layer is located on the side of the body 12 where the support beam 122 is set, and the steel plate layer is located on the side of the body 12 away from the support beam 122, the setting of the first aluminum stripping area facilitates the exposure of the steel plate layer, thus facilitating the welding of the support beam 122 and the steel plate layer. When the steel plate layer is located on the side of the body 12 where the support beam 122 is set, and the aluminum plate layer is located on the side of the body 12 away from the support beam 122, since the melting point of steel is higher than that of aluminum, setting the first aluminum stripping area as the welding area can reduce the welding problems caused by the aluminum plate layer melting before the steel plate layer during welding, thus improving the operational convenience of the welding process and improving the welding quality.

[0142] In some embodiments, taking the first metal layer 1211 as a steel plate layer, the second metal layer 1212 as an aluminum plate layer, and the heat exchanger 13 as an aluminum heat exchanger as an example, as shown in Figures 3 and 7, the body 12 of the battery box 10 includes a lower box 121, which includes a steel plate layer and an aluminum plate layer stacked together. The aluminum heat exchanger is welded to the side of the aluminum plate layer away from the steel plate layer, which facilitates the fixed connection between the aluminum heat exchanger and the lower box 121. Using an aluminum heat exchanger can reduce production costs and facilitate manufacturing. The lower box 121 includes a steel plate layer and an aluminum plate layer stacked together, which enables the lower box 121 to not only have the high strength and high melting point of steel, but also the excellent electrical conductivity, thermal conductivity, good corrosion resistance, and low density of aluminum. This configuration can improve the reliability of the lower box 121.

[0143] The lower housing 121 forms a receiving space 101, with a steel plate layer facing the receiving space 101. An aluminum plate layer is at least located at the bottom of the receiving space 101, with a limiting part 30 formed on the side of the aluminum plate layer facing the aluminum heat exchanger, and the aluminum heat exchanger is at least partially embedded in the limiting part 30. The lower housing 121 has a first aluminum stripping area, which is at least partially located at the bottom of the receiving space 101. The main body 12 also includes a support beam 122, which is located within the receiving space 101 and welded to the steel plate layer corresponding to the first aluminum stripping area. An aluminum plate layer is also located on the side of the receiving space 101. The lower housing 121 has a second aluminum stripping area, which is at least partially located on the side of the receiving space 101. The main body 12 also includes a suspension beam 123, which is located on the side of the lower housing 121 away from the steel plate layer and welded to the steel plate layer corresponding to the second aluminum stripping area. The aluminum heat exchanger includes a serpentine aluminum tube. The thickness of the steel plate layer is 0.5 to 2.0 mm, and the thickness of the aluminum plate layer is 0.05 mm to 1.0 mm.

[0144] Specifically, the steel-aluminum composite panel includes a steel plate layer and an aluminum plate layer. After partially stripping the aluminum from the steel-aluminum composite panel, it is stamped into a basin shape to form the receiving space 101. The preferred steel is DC01, DC56, etc.; the preferred aluminum is 1050, and the secondary is 3 series; the serpentine aluminum water-cooling pipe, suspension beam 123, support beam 122, etc. are welded to the lower box 121 by brazing, and the preferred welding wire or solder is 4 series.

[0145] The specific implementation methods and working principles of the cover 11 and the lower box 121 can be found in the above embodiments, and will not be repeated here.

[0146] In some embodiments, the battery cell 1 is fixedly connected to the lower housing 121, which enables the battery 100a to become a standard module that can be adapted to various types of electrical devices.

[0147] In some embodiments, the battery cell 1 is arranged in a flat manner within the receiving space 101, that is, the thickness direction of the battery cell 1 is parallel to the stacking direction of the aluminum heat exchanger and the lower housing 121.

[0148] Of course, in other embodiments, the arrangement of the battery cell 1 is not limited.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, wherein, The battery includes: A battery housing forms a receiving space, wherein the battery housing includes: The body includes a first metal layer and a second metal layer stacked together; the body serves as the wall of the accommodating space. A heat exchanger is welded to the second metal layer; the first metal layer is made of a first material, and the second metal layer and the heat exchanger are made of a second material. A single battery cell is disposed in the accommodating space; Wherein, the first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchanger includes an aluminum heat exchanger; or the first metal layer includes an aluminum plate layer, the second metal layer includes a steel plate layer, and the heat exchanger includes a steel heat exchanger. The body is provided with a first aluminum stripping area, and the body also includes: A support beam is located within the accommodating space and is welded to the steel plate layer corresponding to the first aluminum stripping area.

2. The battery according to claim 1, wherein, The first metal layer is disposed facing the receiving space.

3. The battery according to claim 1, wherein, The second metal layer forms a limiting portion on the side facing the heat exchanger, and the heat exchanger is at least partially embedded in the limiting portion.

4. The battery according to claim 3, wherein, The limiting part includes a protrusion.

5. The battery according to claim 1, wherein, The second metal layer is disposed at least at the bottom of the accommodating space.

6. The battery according to claim 1, wherein, The aluminum plate layer is disposed at least at the bottom of the receiving space, and the first aluminum stripping area is at least partially located at the bottom of the receiving space.

7. The battery according to claim 6, wherein, The aluminum plate layer is also disposed on the side of the receiving space, and the body is provided with a second aluminum stripping area, the second aluminum stripping area being at least partially located on the side of the receiving space. The body also includes: The suspension beam is located on the side of the body away from the receiving space and is welded to the steel plate layer corresponding to the second aluminum stripping area.

8. The battery according to claim 1, wherein, The first metal layer and the second metal layer are cold-rolled structures.

9. The battery according to claim 1, wherein, The body forms the receiving space with an opening, and the battery housing further includes: A cover is placed on the body to close the opening.

10. The battery according to claim 1, wherein, The heat exchanger includes a serpentine aluminum tube.

11. The battery according to claim 1, wherein, The thickness of the first metal layer is: 0.3~2.3mm.

12. The battery according to claim 11, wherein, The thickness of the first metal layer is: 0.5~2.0mm.

13. The battery according to claim 1, wherein, The thickness of the second metal layer is: 0.03mm~1.3mm.

14. The battery according to claim 13, wherein, The thickness of the second metal layer is: 0.05mm~1.0mm.

15. A battery housing, wherein, The battery housing includes: The body includes a first metal layer and a second metal layer stacked together; A heat exchanger is welded to the second metal layer; the first metal layer is made of a first material, and the second metal layer and the heat exchanger are made of a second material. The main body serves as the wall of the accommodating space, which is used to accommodate individual battery cells. Wherein, the first metal layer includes a steel plate layer, the second metal layer includes an aluminum plate layer, and the heat exchanger includes an aluminum heat exchanger; or the first metal layer includes an aluminum plate layer, the second metal layer includes a steel plate layer, and the heat exchanger includes a steel heat exchanger. The body is provided with a first aluminum stripping area, and the body also includes: A support beam is located within the accommodating space and is welded to the steel plate layer corresponding to the first aluminum stripping area.

16. An electrical appliance, wherein, The electrical device includes: The battery according to any one of claims 1 to 14.

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