Cold plate, battery pack and electric equipment

Abstract

The utility model provides a cold plate, a battery pack and electric equipment. The cold plate comprises a base plate and a runner plate. The first body layer is arranged on one side of the substrate in the thickness direction. The first protective layer is connected to one side of the first body layer away from the substrate in the thickness direction. The first protective layer is suitable as a sacrificial layer capable of reacting with a corrosive substance. According to the cold plate provided by the utility model, the first protective layer is arranged outside the first body layer, so that the first protective layer is used as a sacrificial layer to react with corrosive substances in an application environment containing the corrosive substances, and the purpose of resisting corrosion of the corrosive substances to the first body layer is achieved; and therefore, the external corrosion resistance of the cold plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack cooling, and more specifically to a cold plate, a battery pack and electrical equipment. Background Art

[0002] In the related art, the inner cavity of the cold plate is circulated with coolant or refrigerant when in use. Considering the durability problem, a barrier layer is usually set on the inner side of the cold plate to improve the cold plate's ability to resist internal corrosion. For the exposed surface of the cold plate, in order to solve the corrosion resistance of the cold plate, a coating formed by materials such as polyvinyl chloride, epoxy resin, etc. is generally added to the outer side of the cold plate. The cost of this solution is relatively high. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above problems, the utility model provides a cold plate in a first aspect.

[0005] The cold plate includes a substrate and a flow channel plate, wherein the substrate is suitable for connecting the battery assembly to conduct heat, and the flow channel plate includes:

[0006] a first body layer, the first body layer being disposed on one side of the substrate in a thickness direction; and

[0007] A first protective layer, wherein the first protective layer is connected to a side of the first body layer away from the substrate along the thickness direction, and the first protective layer is suitable for serving as a sacrificial layer capable of reacting with corrosive substances.

[0008] According to the cold plate of the first aspect of the utility model, a first protective layer is arranged outside the first body layer so as to act as a sacrificial layer to react with the corrosive substances in an application environment containing corrosive substances, thereby achieving the purpose of resisting corrosion of the first body layer by the corrosive substances, thereby improving the performance of the cold plate in resisting external corrosion.

[0009] Optionally, the flow channel plate includes:

[0010] A first bonding layer, wherein the first bonding layer is connected to a side of the first body layer close to the substrate along the thickness direction, and the flow channel plate is bonded to the substrate through the first bonding layer.

[0011] Optionally, the substrate comprises:

[0012] a second body layer, the second body layer being disposed on one side of the flow channel plate in a thickness direction; and

[0013] A second bonding layer, the second bonding layer is connected to a side of the second body layer along the thickness direction close to the flow channel plate, the second bonding layer is bonded to the flow channel plate to fix the substrate to the flow channel plate, and the second bonding layer and the flow channel plate enclose a working fluid flow channel suitable for circulating working fluid.

[0014] Optionally, the substrate further comprises:

[0015] A second protective layer, wherein the second protective layer is connected to a side of the second body layer away from the flow channel plate along the thickness direction, and the second protective layer is suitable for being a sacrificial layer capable of reacting with corrosive substances.

[0016] Optionally, the flow channel plate further includes:

[0017] A third protective layer, wherein the third protective layer is connected to a side of the first body layer close to the substrate along the thickness direction, and the third protective layer is suitable for serving as a sacrificial layer capable of reacting with the working medium.

[0018] Optionally, the substrate further comprises:

[0019] A fourth protective layer, the fourth protective layer is connected to a side of the second body layer close to the flow channel plate along the thickness direction, and the fourth protective layer is suitable for serving as a sacrificial layer capable of reacting with the working medium.

[0020] Optionally, the substrate and the flow channel plate are enclosed to form a working medium flow channel suitable for flowing working medium.

[0021] A connecting hole is provided at the end of the substrate, and the connecting hole is connected to the working medium flow channel.

[0022] The cold plate also includes:

[0023] A joint is sealingly connected to the connecting hole and connected to the working fluid flow channel via the connecting hole. The joint includes a base and a passivation layer. The base is constructed as an aluminum alloy part, and the passivation layer is formed on the outer surface of the base.

[0024] Optionally, the first protective layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-zinc alloy series; and / or

[0025] The thickness of the first protective layer accounts for 10% to 30% of the total thickness of the flow channel plate; and / or

[0026] The first body layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-manganese alloy series.

[0027] Optionally, the first bonding layer is configured as a structural layer made of an aluminum alloy material of an aluminum-silicon alloy series; and / or

[0028] The ratio of the thickness of the first bonding layer to the total thickness of the flow channel plate is less than or equal to 10%.

[0029] Optionally, the second body layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-manganese alloy series; and / or

[0030] The second bonding layer is constructed as a structural layer made of aluminum alloy material of aluminum-silicon alloy series; and / or

[0031] The thickness of the second bonding layer accounts for less than or equal to 10% of the total thickness of the substrate.

[0032] Optionally, the second protective layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-zinc alloy series; and / or

[0033] The thickness of the second protective layer accounts for 10% to 30% of the total thickness of the flow channel plate.

[0034] Optionally, the third protective layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-zinc alloy series; and / or

[0035] The thickness of the third protective layer accounts for less than or equal to 10% of the total thickness of the flow channel plate.

[0036] Optionally, the fourth protective layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-zinc alloy series; and / or

[0037] The thickness of the fourth protective layer accounts for less than or equal to 10% of the total thickness of the substrate.

[0038] A second aspect of the present invention provides a battery pack, comprising the cold plate according to the above.

[0039] According to the battery pack of the second aspect of the present invention, the service life of the battery pack can be increased by applying the above-mentioned cold plate.

[0040] Optionally, the battery pack comprises a sealing cover, and the cold plate is fixedly connected to the sealing cover; and / or

[0041] The battery pack includes a tray, and the cold plate is fixedly connected to the tray.

[0042] A third aspect of the present invention provides an electrical device, which includes the above-mentioned battery pack.

[0043] According to the electrical equipment of the third aspect of the utility model, by applying the above-mentioned battery pack, it is helpful to improve the overall service life and performance stability of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0045] Figure 1 An exploded perspective view of a battery pack according to a preferred embodiment of the utility model;

[0046] Figure 2 A three-dimensional view of a cold plate according to a preferred embodiment of the present invention;

[0047] Figure 3 for Figure 2 An exploded perspective view of the cold plate is shown;

[0048] Figure 4 for Figure 2 A bottom view of the cold plate is shown;

[0049] Figure 5 For along Figure 4 A cross-sectional view taken along line AA in FIG.

[0050] Figure 6 for Figure 5 An enlarged view of part I in FIG.

[0051] Figure 7 A partial cross-sectional view of a cold plate according to a preferred embodiment of the utility model;

[0052] Figure 8 A partial cross-sectional view of a cold plate according to another preferred embodiment of the present invention;

[0053] Fig. 9 A partial cross-sectional view of a cold plate according to another preferred embodiment of the present invention; and

[0054] Fig.10 It is a partial cross-sectional view of a cold plate according to another preferred embodiment of the utility model.

[0055] Description of reference numerals:

[0056] 100: Battery pack 110: Cold plate

[0057] 110a: working medium flow channel 111: substrate

[0058] 111a: second extension portion 111b: connection hole

[0059] 111c: second body layer 111d: second protective layer

[0060] 111e: second bonding layer 111f: fourth protective layer

[0061] 112: channel plate 112a: first body layer

[0062] 112b: first protective layer 112c: first bonding layer

[0063] 112d: first extension portion 112e: third protective layer

[0064] 113: Connector 120: Sealing cover

[0065] 130: tray 140: guard plate

[0066] 150: Battery assembly D1: First direction

[0067] D2: Second direction D3: Thickness direction DETAILED DESCRIPTION

[0068] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0069] In order to fully understand the implementation of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the implementation of the present invention is not limited to the specific details familiar to those skilled in the art.

[0070] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention, and the singular forms "a", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, integral bodies, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or combinations thereof.

[0071] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0072] The "parallel" / "vertical" and similar expressions used in the present invention include an absolute parallel / vertical relationship and a roughly parallel / vertical relationship (for example, a relationship that differs from absolute parallel / vertical by -5° to +5°), which can have the same effect.

[0073] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and are not intended to limit the present invention.

[0074] like Figures 1 to 10 As shown, the utility model provides a cold plate 110, a battery pack 100 and an electrical device. Among them, the cold plate 110 is used to achieve a cooling function. When the cold plate 110 is used for the battery pack 100, the cold plate 110 is used to directly or indirectly connect to the battery assembly 150 to conduct the heat of the battery assembly 150. When the working fluid flows through the cold plate 110, the working fluid can exchange the heat generated by the battery assembly 150 to achieve cooling of the battery assembly 150. The electrical device includes a battery pack 100 and an electrical device, and the electrical device and the battery pack 100 are electrically connected. The battery pack 100 is suitable for supplying power to the electrical device. The electrical device here can be a new energy vehicle, a traditional fuel vehicle or a hybrid vehicle.

[0075] See also Figures 2 to 10 According to the utility model, the cold plate 110 may include a substrate 111 and a flow channel plate 112. The substrate 111 is suitable for being directly or indirectly connected to the battery assembly 150 to conduct heat. The flow channel plate 112 is stacked along the thickness direction D3 of the substrate 111 and fixedly connected to the substrate 111. The working fluid flow channel 110a formed between the substrate 111 and the flow channel plate 112 is suitable for circulating the working fluid. The flow channel plate 112 may include a first body layer 112a and a first protective layer 112b. The first protective layer 112b is attached to the side of the first body layer 112a away from the substrate 111 along the thickness direction D3. The first protective layer 112b is suitable as a sacrificial layer that can react with corrosive substances such as acidic, alkaline, and saline. The reaction here is, for example, a chemical reaction.

[0076] According to the cold plate 110 of the utility model, by setting the first protective layer 112b on the outside of the first body layer 112a, it can act as a sacrificial layer to react with the corrosive substances in the application environment containing corrosive substances, thereby achieving the purpose of resisting the corrosion of the first body layer 112a by the corrosive substances, thereby improving the performance of the cold plate 110 in resisting external corrosion.

[0077] For example, the first protective layer 112b can be constructed as a structural layer made of one of aluminum-zinc alloy series aluminum alloy materials such as 7072 aluminum alloy material, 7072mod aluminum alloy material, and a composite material including aluminum-zinc alloy series aluminum alloy materials. The aluminum-zinc alloy series aluminum alloy material here can also be called a seven-series aluminum alloy material or a 7000 series aluminum alloy material. The thickness of the first protective layer 112b accounts for less than or equal to 10% of the total thickness of the flow channel plate 112.

[0078] According to the cold plate 110 of the present invention, by compounding the first protective layer 112b made of one of 7072 aluminum alloy material, 7072mod aluminum alloy material, composite material including 7072 aluminum alloy material and composite material including 7072mod aluminum alloy material on the outside of the first body layer 112a, it is possible to resist corrosion on the outside of the first body layer 112a, thereby improving the performance of the flow channel plate 112 in resisting external corrosion. Compared with the cold plate 110 solution of adding a coating in the related art, the cold plate 110 using the composite structure of the present invention can further reduce the cost of the cold plate 110 and reduce the space requirement of the cold plate 110. In addition, the cold plate 110 of the present invention can simplify the process and reduce the complexity of assembly.

[0079] Further, the thickness of the first protective layer 112b accounts for a ratio of 10% to 30% of the total thickness of the flow channel plate 112. The ratio of the thickness of the first protective layer 112b to the total thickness of the flow channel plate 112 can also be understood as the composite ratio of the first protective layer 112b in the flow channel plate 112. The higher the composite ratio here, the better the performance of the flow channel plate 112 in resisting external corrosion. By compounding the first protective layer 112b with different thickness ratios on the flow channel plate 112, different corrosion resistance can be obtained to meet different application requirements of resisting external corrosion.

[0080] In other examples, the first protective layer 112b can be constructed as a structural layer made of other metal materials or non-metal materials, and can be composited on the outer surface of the first body layer by using composite processes such as hot pressing and welding.

[0081] For example, the first body layer 112a can be constructed as a structural layer made of one of aluminum-manganese alloy series aluminum alloy materials such as 3003 aluminum alloy material, 3003mod aluminum alloy material, and composite materials including aluminum-manganese alloy series aluminum alloy materials. The aluminum-manganese alloy series aluminum alloy material here can also be called a three-series aluminum alloy or a 3000 series aluminum alloy material. By adopting this technical means, the first body layer 112a can be used as a strength layer of the flow channel plate 112 to ensure the mechanical properties such as the structural strength of the flow channel plate 112.

[0082] See also Figures 2 to 10 In addition, the flow channel plate 112 may further include a first bonding layer 112c. The first bonding layer 112c is attached to the surface of the first body layer 112a facing the working fluid flow channel 110a along the thickness direction D3. The substrate 111 may include a second body layer 111c and a second bonding layer 111e. The first bonding layer 112c is attached to one side of the second body layer 111c facing the working fluid flow channel 110a along the thickness direction D3. The second bonding layer 111e is welded to the first bonding layer 112c by a brazing process. The working fluid flow channel 110a is enclosed between the second bonding layer 111e and the first bonding layer 112c. By providing the first bonding layer 112c on the flow channel plate 112, providing the second bonding layer 111e on the substrate 111, and welding the first bonding layer 112c and the second bonding layer 111e by a brazing process, the substrate 111 is fixed to the flow channel plate 112. The portion of the flow channel plate 112 facing the working medium flow channel 110a is the first bonding layer 112c. The portion of the substrate 111 facing the working medium flow channel 110a is the second bonding layer 111e.

[0083] For example, the first bonding layer 112c is constructed as a structural layer made of one of aluminum-silicon alloy series aluminum alloy materials such as 4343 aluminum alloy material and 4045 aluminum alloy material, and a composite material including aluminum-silicon alloy series aluminum alloy materials. 4343 aluminum alloy material and 4045 aluminum alloy material are both aluminum alloy materials suitable for brazing in the aluminum-silicon alloy series. The aluminum-silicon alloy series aluminum alloy material here can also be called a four-series aluminum alloy material or a 4000 series aluminum alloy material.

[0084] For example, the second bonding layer 111e is constructed as a structural layer made of one of aluminum-silicon alloy series aluminum alloy materials such as 4343 aluminum alloy material and 4045 aluminum alloy material, and a composite material including aluminum-silicon alloy series aluminum alloy materials. Both 4343 aluminum alloy material and 4045 aluminum alloy material belong to aluminum-silicon alloy series aluminum alloy materials suitable for brazing.

[0085] Furthermore, the material of the first bonding layer 112 c and the material of the second bonding layer 111 e may be the same or different.

[0086] Optionally, the thickness of the first bonding layer 112c accounts for less than or equal to 10% of the total thickness of the flow channel plate 112. For example, the thickness of the first bonding layer 112c accounts for 5% to 10% of the total thickness of the flow channel plate 112.

[0087] Optionally, the thickness of the second bonding layer 111e accounts for less than or equal to 10% of the total thickness of the substrate 111. For example, the thickness of the second bonding layer 111e accounts for 5% to 10% of the total thickness of the substrate 111.

[0088] In other examples, when the flow channel plate 112 has the first bonding layer 112c, the substrate 111 may not have the second bonding layer 111e. For example, the substrate 111 only has the second body layer 111c.

[0089] See also Figures 8 to 10 In addition, the substrate 111 may further include a second protective layer 111d. The second protective layer 111d is attached to the surface of the second body layer away from the flow channel plate 112 along the thickness direction D3. The second protective layer 111d may be constructed as a structural layer made of one of the aluminum-zinc alloy series aluminum alloy materials such as 7072 aluminum alloy material, 7072mod aluminum alloy material, and a composite material containing aluminum-zinc alloy series aluminum alloy materials. The thickness of the second protective layer 111d accounts for less than or equal to 10% of the total thickness of the substrate 111. By compounding the second protective layer 111d on the side of the second body layer facing the outside, the external corrosion resistance of the substrate 111 can be improved.

[0090] For example, the thickness of the second protective layer 111d accounts for a ratio of 10% to 30% of the total thickness of the flow channel plate 112. The ratio of the thickness of the second protective layer 111d to the total thickness of the substrate 111 can also be understood as the composite ratio of the second protective layer 111d on the substrate 111. The higher the composite ratio here, the better the anti-corrosion performance of the substrate 111. By composite the second protective layer 111d with different thickness ratios on the substrate 111, different corrosion resistance can be obtained to meet different anti-corrosion application requirements.

[0091] In other examples, the second protective layer can be constructed as a structural layer made of other metal materials or non-metal materials, and can be composited on the outer surface of the first body layer by using composite processes such as hot pressing and welding.

[0092] See also Figures 2 to 10In addition, the flow channel plate 112 may further include a third protective layer 112e. The third protective layer 112e is located between the first bonding layer 112c and the first body layer 112a along the thickness direction D3. The third protective layer 112e is attached to the first bonding layer 112c and the first body layer 112a. The third protective layer 112e is configured as a structural layer made of one of the aluminum-zinc alloy series aluminum alloy materials such as 7072 aluminum alloy material, 7072mod aluminum alloy material, and a composite material containing aluminum-zinc alloy series aluminum alloy materials. The thickness of the third protective layer 112e accounts for no more than 10% of the total thickness of the flow channel plate 112. By arranging the third protective layer 112e between the first bonding layer 112c and the first body layer 112a, when internal corrosion occurs in the flow channel plate 112, it can be corroded before the first body layer 112a, thereby improving the performance of the flow channel plate 112 in resisting internal corrosion.

[0093] For example, the ratio of the thickness of the third protection layer 112 e to the total thickness of the flow channel plate 112 is in the range of 5% to 10%.

[0094] In other examples, the third protective layer may be constructed as a structural layer made of other metallic materials or non-metallic materials.

[0095] See also Figures 8 to 10 In addition, the substrate 111 may further include a fourth protective layer 111f. The fourth protective layer 111f is located between the second bonding layer and the second body layer along the thickness direction D3. The fourth protective layer 111f is attached to the second bonding layer and the second body layer. The fourth protective layer 111f may be constructed as a structural layer made of one of aluminum-zinc alloy series aluminum alloy materials such as 7072 aluminum alloy material, 7072mod aluminum alloy material, and a composite material containing aluminum-zinc alloy series aluminum alloy materials. The thickness of the fourth protective layer 111f accounts for no more than 10% of the total thickness of the substrate 111. By arranging the fourth protective layer 111f between the second bonding layer and the second body layer, the substrate 111 can be corroded before the second body layer when internal corrosion occurs, thereby improving the internal corrosion resistance of the substrate 111.

[0096] For example, the ratio of the thickness of the fourth protection layer 111 f to the total thickness of the substrate 111 is in the range of 5% to 10%.

[0097] In other examples, the fourth protective layer may be constructed as a structural layer made of other metallic materials or non-metallic materials.

[0098] The overall thickness of the cold plate 110 of the present invention may be consistent with the thickness of a conventional cold plate 110 .

[0099] See also Figures 2 to 10For example, a connection hole 111b is provided at the end of the substrate 111. The connection hole 111b is connected to the working fluid flow channel 110a. The cold plate 110 may also include a joint 113. The joint 113 is sealed and connected to the connection hole 111b. And the joint 113 is connected to the working fluid flow channel 110a via the connection hole 111b. The joint 113 may include a base (not shown) and a passivation layer (not shown). The base may be constructed as a structure made of aluminum alloy. The passivation layer may be constructed as a structural layer formed on the outer surface of the base by a pre-treatment process. The pre-treatment process here may include a pickling process and a passivation process. The passivation layer is suitable for reacting with acidic, alkaline and other substances before the base as a sacrificial layer or an anti-corrosion layer to resist corrosion of the base by the external environment. The reaction here can also be understood as a chemical reaction. The passivation layer serves the purpose of protecting the base. The connection hole 111b can be used as a mounting hole for the joint 113. When the joint 113 is assembled, a part of the joint 113 is embedded in the connection hole 111b. By providing the joint 113, it is convenient for the cold plate 110 to be connected to other pipelines or channels through the joint 113 to realize the circulation flow of the working medium. By processing the outside of the joint 113 to obtain a passivation layer, the resistance of the joint 113 to external corrosion can be improved, thereby further improving the overall resistance of the cold plate 110 to external corrosion.

[0100] exist Figures 1 to 10 In the example shown, the dimension of the cold plate 110 along the first direction D1 is greater than the dimension along the second direction D2. The first direction D1 is perpendicular to the second direction D2. And both the first direction D1 and the second direction D2 are perpendicular to the thickness direction D3. The surface of the flow channel plate 112 facing the substrate 111 is recessed along the thickness direction D3 toward the side away from the substrate 111 to form a flow channel groove. Correspondingly, the surface of the flow channel plate 112 facing away from the substrate 111 bulges outward to form a flow channel rib. The flow channel plate 112 can be made by a stamping process. The surface of the substrate 111 facing the flow channel plate 112 is a flat surface. The flow channel groove is closed by the substrate 111 to form a working fluid flow channel 110a. The end of the flow channel plate 112 along the first direction D1 extends outward to form a first extension portion 112d. The end of the substrate 111 along the first direction D1 extends outward to form a second extension portion 111a. The connection hole 111 b is formed through the second extension portion 111 a along the thickness direction D3 . The joint 113 is connected to the connection hole 111 b and protrudes from a surface of the substrate 111 away from the flow channel plate 112 along the thickness direction D3 .

[0101] See also Figures 1 to 10 The utility model further provides a battery pack 100. The battery pack 100 may include the cold plate 110 described above. According to the battery pack 100 of the utility model, by applying the cold plate 110 described above, the service life of the battery pack 100 can be improved.

[0102] See also Figure 1 For example, the battery pack 100 may include a tray 130, a sealing cover 120, and a battery assembly 150. The sealing cover 120 is sealed and connected to the tray 130. The sealing cover 120 and the tray 130 enclose a receiving space. The battery assembly 150 is received in the receiving space. The battery assembly 150 here may also be referred to as a battery pack 100 module. The battery assembly 150 includes a battery pack 100 monomer and a restraining member, etc.

[0103] Optionally, the cold plate 110 may be fixedly connected to the sealing cover 120 to achieve integration of the cold plate 110 and the sealing cover 120 .

[0104] Optionally, the cold plate 110 may be fixedly connected to the tray 130 to achieve integration of the cold plate 110 and the tray 130. This can simplify the structure, reduce the number of parts, and improve assembly efficiency.

[0105] For example, at least one of the tray 130 and the sealing cover 120 may include a third body layer (not shown), a fifth protective layer (not shown), and a sixth protective layer (not shown). The third body layer may be configured to be a structural layer made of one of the aluminum-manganese alloy series aluminum alloy materials such as 3003 aluminum alloy material, 3003mod aluminum alloy material, and a composite material including the aluminum-manganese alloy series aluminum alloy materials. The fifth protective layer is attached to a surface of the third body layer along the thickness direction D3 of the third body layer. The fifth protective layer may be configured to be a structural layer made of one of the aluminum-zinc alloy series aluminum alloy materials such as 7072 aluminum alloy material, 7072mod aluminum alloy material, and a composite material including the aluminum-zinc alloy series aluminum alloy materials. The sixth protective layer is attached to another surface of the third body layer along the thickness direction D3 of the third body layer. The sixth protective layer is configured to be a structural layer made of one of the aluminum-zinc alloy series aluminum alloy materials such as 7072 aluminum alloy material, 7072mod aluminum alloy material, and a composite material including the aluminum-zinc alloy series aluminum alloy materials. In other words, the tray 130 and / or the sealing cover 120 can adopt the structure of the composite plate of the substrate 111 or the flow channel plate 112. The third body layer here can adopt the structure and material of the first body layer 112a or the second body layer mentioned above. Any of the fifth protective layer and the sixth protective layer here can adopt the structure and material of the first protective layer 112b or the second protective layer mentioned above. In this way, the performance of the tray 130 and / or the sealing cover 120 against external corrosion can be improved on the basis of ensuring the structural strength of the tray 130 and / or the sealing cover 120.

[0106] See also Figure 1 Further, the battery pack 100 may further include a protective plate 140 . The protective plate 140 is located on a side of the tray 130 away from the sealing cover 120 . And the protective plate 140 is connected to the tray 130 .

[0107] The utility model also provides an electric device. The electric device may include the above-mentioned battery pack 100. According to the electric device of the utility model, by applying the above-mentioned battery pack 100, it is helpful to improve the overall service life and performance stability of the electric device.

[0108] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0109] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A cold plate, characterized in that: The cold plate includes a substrate and a flow channel plate, wherein the substrate is suitable for connecting the battery assembly to conduct heat, and the flow channel plate includes: a first body layer, the first body layer being disposed on one side of the substrate in a thickness direction; and A first protective layer, wherein the first protective layer is connected to a side of the first body layer away from the substrate along the thickness direction, and the first protective layer is suitable for serving as a sacrificial layer capable of reacting with corrosive substances.

2. The cold plate according to claim 1, characterized in that The flow channel plate comprises: A first bonding layer, wherein the first bonding layer is connected to a side of the first body layer close to the substrate along the thickness direction, and the flow channel plate is bonded to the substrate through the first bonding layer.

3. The cold plate according to claim 1 or 2, characterized in that: The substrate comprises: a second body layer, the second body layer being disposed on one side of the flow channel plate in a thickness direction; and A second bonding layer, the second bonding layer is connected to a side of the second body layer along the thickness direction close to the flow channel plate, the second bonding layer is bonded to the flow channel plate to fix the substrate to the flow channel plate, and the second bonding layer and the flow channel plate enclose a working fluid flow channel suitable for circulating working fluid.

4. The cold plate according to claim 3, characterized in that The substrate further comprises: A second protective layer, wherein the second protective layer is connected to a side of the second body layer away from the flow channel plate along the thickness direction, and the second protective layer is suitable for being a sacrificial layer capable of reacting with corrosive substances.

5. The cold plate according to claim 1 or 2, characterized in that: The flow channel plate also includes: A third protective layer, wherein the third protective layer is connected to a side of the first body layer close to the substrate along the thickness direction, and the third protective layer is suitable for serving as a sacrificial layer capable of reacting with the working medium.

6. The cold plate according to claim 3, characterized in that The substrate further comprises: A fourth protective layer, the fourth protective layer is connected to a side of the second body layer close to the flow channel plate along the thickness direction, and the fourth protective layer is suitable for serving as a sacrificial layer capable of reacting with the working medium.

7. The cold plate according to claim 1 or 2, characterized in that: The substrate and the flow channel plate are enclosed to form a working medium flow channel suitable for flowing working medium. A connecting hole is provided at the end of the substrate, and the connecting hole is connected to the working medium flow channel. The cold plate also includes: A joint is sealingly connected to the connecting hole and connected to the working fluid flow channel via the connecting hole. The joint includes a base and a passivation layer. The base is constructed as an aluminum alloy part, and the passivation layer is formed on the outer surface of the base.

8. The cold plate according to claim 1, characterized in that The first protective layer is constructed as a structural layer made of aluminum alloy material of aluminum-zinc alloy series; and / or The thickness of the first protective layer accounts for 10% to 30% of the total thickness of the flow channel plate; and / or The first body layer is constructed as a structural layer made of an aluminum alloy material of an aluminum-manganese alloy series.

9. The cold plate according to claim 2, characterized in that The first bonding layer is configured as a structural layer made of an aluminum alloy material of an aluminum-silicon alloy series; and / or The ratio of the thickness of the first bonding layer to the total thickness of the flow channel plate is less than or equal to 10%.

10. The cold plate according to claim 3, characterized in that The second body layer is constructed as a structural layer made of aluminum alloy material of aluminum-manganese alloy series; and / or The second bonding layer is constructed as a structural layer made of aluminum alloy material of aluminum-silicon alloy series; and / or The thickness of the second bonding layer accounts for less than or equal to 10% of the total thickness of the substrate.

11. The cold plate according to claim 4, characterized in that The second protective layer is constructed as a structural layer made of aluminum alloy material of aluminum-zinc alloy series; and / or The thickness of the second protective layer accounts for 10% to 30% of the total thickness of the flow channel plate.

12. The cold plate according to claim 5, characterized in that The third protective layer is constructed as a structural layer made of aluminum alloy material of aluminum-zinc alloy series; and / or The thickness of the third protective layer accounts for less than or equal to 10% of the total thickness of the flow channel plate.

13. The cold plate according to claim 6, characterized in that The fourth protective layer is constructed as a structural layer made of aluminum-zinc alloy series aluminum alloy material; and / or The thickness of the fourth protective layer accounts for less than or equal to 10% of the total thickness of the substrate.

14. A battery pack, characterized in that: The battery pack comprises a cold plate according to any one of claims 1 to 13.

15. The battery pack according to claim 14, characterized in that: The battery pack includes a sealing cover, and the cold plate is fixedly connected to the sealing cover; and / or The battery pack includes a tray, and the cold plate is fixedly connected to the tray.

16. An electrical equipment, characterized in that: The electrical device comprises the battery pack according to claim 14 or 15.

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