Liquid cooling plate based on metal plastic composite plate and battery pack

Abstract

The utility model discloses a liquid cooling plate based on a metal-plastic composite plate and a battery pack, the liquid cooling plate based on the metal-plastic composite plate comprises a flat plate and a metal-plastic composite runner plate, the metal-plastic composite runner plate comprises a plastic part and a metal connecting part connected to the periphery of the plastic part, and the plastic part is hermetically connected with the flat plate through the metal connecting part to form a liquid cooling cavity. The metal connecting parts are arranged on the periphery of the plastic part, and the plastic part is in sealed connection with the flat plate through the metal connecting parts, so that the manufacturing difficulty of the liquid cooling plate can be reduced, the production efficiency is improved, the weight and cost of the liquid cooling plate are effectively reduced, and meanwhile, the heat preservation performance of a liquid cooling system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of liquid cooling plates, and more specifically, to a liquid cooling plate and a battery pack based on a metal-plastic composite plate. Background Art

[0002] Since batteries are cooled by liquid cooling plates, which have the advantages of high cooling efficiency, compact structure, and mature technology, liquid-cooled battery management systems have become the mainstream battery cooling method for electric vehicles.

[0003] The liquid cooling plates in the existing technology are of various types, which can be mainly divided into stamping plate type, inflation type, harmonica tube type, bent tube type, serpentine tube type, profile + stir friction welding type, machining + welding type, plate water distribution strip type, welding + buried pipe, pressed pipe type and other schemes.

[0004] Considering factors such as heat dissipation performance, product quality, and production cost, aluminum liquid cooling plates are the first choice in the industry. However, aluminum liquid cooling plates in the prior art have the problems of being heavy, high cost, and poor thermal insulation performance due to rapid heat dissipation.

[0005] For example, application number 202303980171 discloses a water-cooling plate for a power battery liquid cooling system, which includes a support plate and a plastic flow channel plate, and the support plate and the plastic flow channel plate are connected by a sealant structure, a welding structure, or a nano injection molding connection structure.

[0006] Although the water-cooled plate can reduce the weight and cost of the water-cooled plate, its defect is that there are some problems in the connection method of the plastic flow channel plate and the support plate of the water-cooled plate. For example, if the connection is made by welding, there are large differences in the melting point and expansion coefficient of the plastic flow channel plate and the support plate, the welding operation is relatively complicated, and it is easy to cause thermal deformation; for example, when using nano injection molding, special equipment and technology are required, the operation is relatively complicated, and the production cost is high; for example, if the connection is made by sealant, the bonding strength of the sealant is affected by high temperature and vibration environment, and the water-cooled plate is easily affected by external forces and leaks.

[0007] Therefore, the prior art needs to be improved. Utility Model Content

[0008] The purpose of the present application is to provide a liquid cooling plate and a battery pack based on a metal-plastic composite plate, aiming to solve the technical problem of the connection structure between the plastic flow channel plate and the flat plate of the liquid cooling plate in the prior art.

[0009] To achieve the above purpose, the technical solution adopted in this application is:

[0010] In a first aspect, the present application provides a liquid cooling plate based on a metal-plastic composite plate, which includes:

[0011] flat;

[0012] The metal-plastic composite flow channel plate comprises: a plastic part and a metal connecting part connected to the periphery of the plastic part, and the plastic part is sealed and connected to the flat plate through the metal connecting part to form a liquid cooling cavity.

[0013] In one embodiment, the metal connecting portion and the plastic portion are integrally formed.

[0014] In one embodiment, the plastic part includes a first plastic layer, and a stepped connecting surface is arranged around the first plastic layer. The first plastic layer is connected to the metal connecting part through the stepped connecting surface.

[0015] The first plastic layer is provided with a connecting groove, and the connecting groove has the step connecting surface;

[0016] The metal connecting portion is embedded in the connecting groove, and the metal connecting portion is in contact with the step connecting surface.

[0017] In one embodiment, the metal connection portion is provided with a concave notch matching with the step connection surface, and the metal connection portion is staggeredly connected to the step connection surface through the concave notch.

[0018] In one embodiment, the step connection surface is arranged at the peripheral edge positions of the first plastic layer.

[0019] In one embodiment, the plate comprises at least a first metal layer;

[0020] The metal connection portion comprises at least a second metal layer;

[0021] The metal connection portion is connected to the first metal layer through the second metal layer.

[0022] In one embodiment, the first metal layer includes one of the following structures:

[0023] Aluminum plate layer or copper plate layer.

[0024] In one embodiment, the plate comprises:

[0025] A first metal layer;

[0026] a third metal layer, the third metal layer being connected to the first metal layer to form a composite metal plate;

[0027] The metal connection portion comprises at least a second metal layer;

[0028] The metal connection portion is connected to the first metal layer through the second metal layer.

[0029] In one embodiment, the first metal layer includes: an aluminum plate layer;

[0030] The third metal layer includes a copper plate layer, and the third metal layer is connected with the first metal layer to form a copper-aluminum composite plate;

[0031] The second metal layer includes an aluminum plate layer, and the third metal layer is sealed and connected to the second metal layer via the first metal layer.

[0032] In one embodiment, the metal connection portion is sealed and connected to the flat plate by welding.

[0033] In one embodiment, the plate includes a first metal layer;

[0034] The metal connection part includes a second metal layer and a second plastic layer arranged on the second metal layer. The second plastic layer and the second metal layer are connected to form a metal-plastic plate. The metal-plastic plate is used for thermal composite connection with the first metal layer.

[0035] In one embodiment, the second metal layer includes one of the following structures: an aluminum plate layer, a steel plate layer or a stainless steel plate layer.

[0036] In one embodiment, the second plastic layer comprises one of the following structures:

[0037] Polyolefin plastic layer, modified polyolefin plastic layer or polyvinyl chloride plastic layer.

[0038] In a second aspect, the present application provides a battery pack, wherein the battery pack includes a liquid cooling plate based on a metal-plastic composite plate as described in the above embodiment. Thus, the battery pack can have all the features and effects of the above liquid cooling plate based on a metal-plastic composite plate, which will not be described in detail.

[0039] The beneficial effects of a liquid cooling plate and a battery pack based on a metal-plastic composite plate provided in the present application are at least:

[0040] The present application discloses a liquid cooling plate and a battery pack based on a metal-plastic composite plate, wherein the liquid cooling plate based on the metal-plastic composite plate comprises a flat plate and a metal-plastic composite flow channel plate, wherein the metal-plastic composite flow channel plate comprises: a plastic part and a metal connecting part connected to the four sides of the plastic part, and the plastic part is sealed and connected to the flat plate through the metal connecting part to form a liquid cooling chamber. The present application provides metal connecting parts around the plastic part, and the plastic part is sealed and connected to the flat plate through the metal connecting parts, thereby reducing the manufacturing difficulty of the liquid cooling plate, improving production efficiency, effectively reducing the weight and cost of the liquid cooling plate, and improving the thermal insulation performance of the liquid cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 An exploded view of a liquid cooling plate based on a metal-plastic composite plate provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a metal-plastic composite flow channel plate provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of a first connection structure between a metal connection part and a plastic part provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of a second connection structure between a metal connection part and a plastic part provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of a third connection structure between a metal connection part and a plastic part provided in an embodiment of the present application;

[0047] Figure 6 Schematic diagram of the assembly structure of the metal connecting part and the flat plate provided in the embodiment of the present application Figure 1 ;

[0048] Figure 7 Schematic diagram of the assembly structure of the metal connecting part and the flat plate provided in the embodiment of the present application Figure 2 ;

[0049] Figure 8 Schematic diagram of the assembly structure of the metal connecting part and the flat plate provided in the embodiment of the present application Figure 3 ;

[0050] Fig. 9 A schematic diagram of the assembly structure of the composite metal plate and the metal-plastic composite flow channel plate provided in an embodiment of the present application;

[0051] Fig.10 Schematic diagram of the assembly structure of the flat plate and the metal plastic plate provided in the embodiment of the present application Figure 1 ;

[0052] Fig.11 Schematic diagram of the assembly structure of the flat plate and the metal plastic plate provided in the embodiment of the present application Figure 2 ;

[0053] Fig.12 Schematic diagram of the assembly structure of the flat plate and the metal plastic plate provided in the embodiment of the present application Figure 3.

[0054] Among them, the reference numerals in the figure are:

[0055] 100, flat plate; 200, metal-plastic composite flow channel plate; 300, liquid inlet; 400, liquid outlet; 100a, composite metal plate; 110, first metal layer; 120, third metal layer; 111, aluminum plate layer; 112, copper plate layer; 113, steel plate layer; 114, stainless steel plate layer; 210, plastic part; 220, metal connecting part; 230, flow channel groove; 240, liquid cooling chamber; 211, first plastic layer; 212, step connecting surface; 213, connecting groove; 221, second metal layer; 222, second plastic layer; 223, concave notch. DETAILED DESCRIPTION

[0056] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0058] Embodiment 1:

[0059] See also Figure 1 The present embodiment provides a liquid cooling plate based on a metal-plastic composite plate, wherein the liquid cooling plate based on the metal-plastic composite plate includes a flat plate 100 and a metal-plastic composite flow channel plate 200, and the metal-plastic composite flow channel plate 200 may include: a plastic part 210 and a metal connecting part 220 connected to the plastic part 210 on all sides, and the plastic part 210 is sealed and connected to the flat plate 100 through the metal connecting part 220 to form a liquid cooling cavity 240.

[0060] In this embodiment, the flat plate 100 and the metal-plastic composite flow channel plate 200 are connected to form a liquid cooling chamber 240, and the liquid cooling chamber 240 is used to contain the coolant, so as to use the coolant to dissipate heat from the battery. The flat plate 100 may be provided with a liquid inlet 300 and a liquid outlet 400, and the liquid inlet 300 and the liquid outlet 400 are both connected to the liquid cooling chamber 240 to facilitate the coolant to flow in and out. Among them, the metal-plastic composite flow channel plate 200 may include a plastic part 210 and a metal connecting part 220, and the metal connecting part 220 is arranged around the plastic part 210. The plastic part 210 can be sealed and connected to the flat plate 100 through the metal connecting part 220. The traditional liquid cooling plate manufacturing process uses an aluminum flat plate 100 and an aluminum flow channel plate. The aluminum flat plate 100 and the aluminum flow channel plate are usually sealed and connected by brazing. In this embodiment, the plastic part 210 can be sealed and connected to the flat plate 100 through the metal connecting part 220, that is, the metal connecting part 220 and the flat plate 100 can also be sealed and connected by traditional brazing, without the need to purchase new welding equipment and use new processes to connect the metal-plastic composite flow channel plate 200. Therefore, this embodiment can greatly reduce the difficulty of the connection process between the plastic part 210 and the flat plate 100 in the liquid cooling plate, that is, it can reduce the manufacturing difficulty of the liquid cooling plate, improve production efficiency, and reduce production costs.

[0061] In this embodiment, metal connecting parts 220 are provided around the plastic part 210, and the plastic part 210 is sealed and connected to the flat plate 100 through the metal connecting parts 220, which can reduce the manufacturing difficulty of the liquid cooling plate, improve production efficiency, effectively reduce the weight and cost of the liquid cooling plate, and at the same time improve the thermal insulation performance of the liquid cooling system.

[0062] See also Figure 2 In this embodiment, the metal connection part 220 can be integrally formed with the plastic part 210 .

[0063] Specifically, the metal connection part 220 and the plastic part 210 can be connected by using a plastic-metal integral molding process. For example, a layer of special ink is first coated on the metal connection part 220, and then the plastic resin and the reinforcing material are fully mixed. After the plastic is melted, the plastic is injected into the mold by a high-pressure injection molding machine and closely adhered to the surface of the metal connection part 220 coated with the special ink. After a certain pressure and temperature treatment, the plastic and the metal connection part 220 are tightly combined into one, and finally the metal connection part 220 and the plastic part 210 are connected to form an integrally molded metal-plastic composite flow channel plate 200.

[0064] Specifically, see Figure 3 The flat plate 100 includes at least a first metal layer 110 , the metal connection portion 220 includes at least a second metal layer 221 , and the metal connection portion 220 is connected to the first metal layer 110 through the second metal layer 221 .

[0065] In this embodiment, the flat plate 100 includes at least a first metal layer 110, and the metal connection part 220 includes at least a second metal layer 221. The metal connection part 220 is connected to the first metal layer 110 through the second metal layer 221. As mentioned above, the metal connection part 220 and the flat plate 100 can also be connected by traditional brazing to achieve a sealed connection, thereby reducing the manufacturing difficulty of the liquid cooling plate, improving production efficiency, and reducing production costs. For example, the flat plate 100 can be made of a single-layer aluminum alloy plate, and the metal connection part 220 can also be made of a single-layer aluminum alloy plate. The flat plate 100 and the metal connection part 220 can be brazed to achieve a sealed connection to achieve a sealed connection between the flat plate 100 and the metal-plastic composite flow channel plate 200, thereby reducing the manufacturing difficulty of the liquid cooling plate. Alternatively, the metal connection part 220 can also be made of a steel plate, and the aluminum flat plate 100 and the steel metal connection part 220 can also be brazed to achieve a sealed connection to achieve a sealed connection between the flat plate 100 and the metal-plastic composite flow channel plate 200.

[0066] Specifically, see Figure 3 The plastic part 210 includes a first plastic layer 211 . A step connection surface 212 is arranged around the first plastic layer 211 . The first plastic layer 211 is connected to the metal connection part 220 via the step connection surface 212 .

[0067] In this embodiment, the plastic part 210 may include a first plastic layer 211, and the first plastic layer 211 may include a lightweight high-strength plastic layer, that is, the plastic part 210 may be made of lightweight high-strength plastic, and the density of the lightweight high-strength plastic may be 600-1500kg / m3. Among them, the first plastic layer 211 is provided with a step connection surface 212 around it, and the first plastic layer 211 is connected to the metal connection part 220 through the step connection surface 212, which is equivalent to the first plastic layer 211 being connected to the metal connection part 220 through the step connection surface 212 to form a metal-plastic composite plate. On the one hand, the step connection surface 212 can make the metal-plastic bonding strength good, which is conducive to strengthening the connection strength between the metal connection part 220 and the plastic part 210; on the other hand, the step connection surface 212 can make the metal connection part 220 flush with the side of the plastic part 210 close to the liquid cooling chamber 240, which is convenient for the metal connection part 220 to be connected with the flat plate 100.

[0068] Among them, see Figure 3 The step connection surface 212 can be set at the edge positions around the first plastic layer 211, and the metal connection part 220 can be completely in contact with the step connection surface 212, so that the metal connection part 220 and the plastic part 210 can be accurately and firmly connected together, so that the metal connection part 220 is set on the step connection surface 212 and is flush with the side of the plastic part 210 close to the liquid cooling chamber 240.

[0069] See also Figure 4 A connecting groove 213 may be provided on the first plastic layer 211, and the connecting groove 213 has a stepped connecting surface 212. The metal connecting part 220 is embedded in the connecting groove 213, and the metal connecting part 220 can be completely fitted with the stepped connecting surface 212, so that the metal connecting part 220 and the plastic part 210 can be accurately and firmly compositely connected together, so that the metal connecting part 220 is embedded in the connecting groove 213 and is flush with the side of the plastic part 210 close to the liquid cooling chamber 240.

[0070] See also Figure 5 The metal connecting part 220 may be provided with a concave notch 223 that matches the step connecting surface 212. The metal connecting part 220 is staggeredly connected to the step connecting surface 212 through the concave notch 223, and the metal connecting part 220 and the plastic part 210 can be accurately and firmly compositely connected together, so that the metal connecting part 220 is staggeredly connected to the step connecting surface 212 and is flush with the side of the plastic part 210 close to the liquid cooling chamber 240.

[0071] Specifically, see Figure 1 The plastic part 210 may have a flow channel 230, and the plastic part 210 may be connected to the flat plate 100 through the flow channel 230 to form a flow channel for the flow of the coolant. For example, the liquid inlet 300 and the liquid outlet 400 are both connected to the flow channel to facilitate the flow of the coolant in and out.

[0072] Optionally, the first metal layer 110 includes one of the following structures:

[0073] Aluminum plate layer 111 or copper plate layer 112 .

[0074] For example, the first metal layer 110 may include an aluminum plate layer 111. For example, the flat plate 100 may include an aluminum plate layer 111, that is, the flat plate 100 may be made of aluminum or aluminum alloy plate, which has good thermal conductivity, light weight, and low cost. The aluminum flat plate 100 is a better choice for making a liquid cooling plate.

[0075] For example, the first metal layer 110 may include a copper plate layer 112. For example, the flat plate 100 may include a copper plate layer 112, that is, the flat plate 100 may be made of copper or a copper alloy plate, and copper has good thermal conductivity, good rigidity, and high strength.

[0076] Optionally, the second metal layer 221 includes one of the following structures: an aluminum plate layer 111 , a steel plate layer 113 or a stainless steel plate layer 114 .

[0077] The metal connection part 220 at least includes a second metal layer 221 , that is, the metal connection part 220 can be made of a metal plate. The metal plate has high strength, good rigidity, is easy to produce, and can reduce production costs.

[0078] For example, see Figure 6 The second metal layer 221 may include an aluminum plate layer 111, that is, the metal connecting portion 220 may be made of an aluminum plate, which has a simple structure and is easy to implement.

[0079] For example, see Figure 7 The second metal layer 221 may include a steel plate layer 113, that is, the metal connecting portion 220 may be made of a steel plate, which has a simple structure and is easy to implement.

[0080] For example, see Figure 8 The second metal layer 221 may include a stainless steel plate layer 114, that is, the metal connecting portion 220 may be made of a stainless steel plate, which has a simple structure and is easy to implement.

[0081] It should be understood that the metal connection part 220 is not limited to the above-mentioned single-layer metal plate, and the metal connection part 220 may also be a non-metal plate, or the metal connection part 220 may also be a multi-layer metal plate, for example, the metal connection part 220 may also be a metal composite plate.

[0082] Specifically, see Figure 3 , the material of the first metal layer 110 and the second metal layer 221 can be consistent.

[0083] For example, the first metal layer 110 can be an aluminum plate layer 111, and the second metal layer 221 can be an aluminum plate layer 111, that is, the flat plate 100 can be made of aluminum or an aluminum alloy plate, and the metal connecting part 220 can also be made of aluminum or an aluminum alloy plate. The structure is simple and easy to implement, which can reduce the manufacturing difficulty of the liquid cooling plate and reduce the production cost.

[0084] Embodiment 2:

[0085] See also Figure 1 The liquid cooling plate based on the metal-plastic composite plate includes a flat plate 100 and a metal-plastic composite flow channel plate 200. The metal-plastic composite flow channel plate 200 may include: a plastic part 210 and a metal connecting part 220 connected to the four sides of the plastic part 210, and the plastic part 210 is sealed and connected to the flat plate 100 through the metal connecting part 220 to form a liquid cooling chamber 240. The flat plate 100 includes a first metal layer 110, and the first metal layer 110 is an aluminum plate layer 111. The metal connecting part 220 includes a second metal layer 221, and the second metal layer 221 is an aluminum plate layer 111. The thickness of the flat plate 100 is 1-2 mm, and the thickness of the metal connecting part 220 is 2.5-3.5 mm. The flat plate 100 and the metal connecting part 220 are sealed and connected by brazing.

[0086] In this embodiment, since the brazing heating temperature is lower than the melting point of the aluminum plate layer 111, it is possible to avoid leakage caused by melting through of the thin aluminum plate. The flat plate 100 and the metal connecting portion 220 can be sealed by brazing to achieve a sealed connection between the flat plate 100 and the metal-plastic composite flow channel plate 200, thereby reducing the manufacturing difficulty of the liquid cooling plate and reducing the production cost.

[0087] Embodiment 3:

[0088] See also Figure 1 The liquid cooling plate based on the metal-plastic composite plate includes a flat plate 100 and a metal-plastic composite flow channel plate 200. The metal-plastic composite flow channel plate 200 may include: a plastic part 210 and a metal connecting part 220 connected to the plastic part 210 on all sides, and the plastic part 210 is sealed and connected to the flat plate 100 through the metal connecting part 220 to form a liquid cooling chamber 240.

[0089] See also Fig. 9 The flat plate 100 may include: a first metal layer 110 and a third metal layer 120 , the third metal layer 120 is connected to the first metal layer 110 to form a composite metal plate 100a; the metal connecting portion 220 includes at least a second metal layer 221 , and the metal connecting portion 220 is connected to the first metal layer 110 through the second metal layer 221 .

[0090] In this embodiment, the flat plate 100 may adopt a composite metal plate 100a. The composite metal plate 100a has good rigidity and high strength, and can enhance the load-bearing performance of the flat plate 100, thereby preventing the liquid cooling plate from deforming and improving the heat dissipation effect of the liquid cooling plate on the battery.

[0091] Specifically, the first metal layer 110 may include: an aluminum plate layer 111, the third metal layer 120 may include a copper plate layer 112, the third metal layer 120 is connected to the first metal layer 110 to form a copper-aluminum composite plate, the second metal layer 221 may include an aluminum plate layer 111, and the third metal layer 120 is sealed and connected to the second metal layer 221 via the first metal layer 110.

[0092] In this embodiment, the first metal layer 110 may be an aluminum plate layer 111, and the third metal layer 120 may be a copper plate layer 112. The first metal layer 110 and the third metal layer 120 may be connected to form a copper-aluminum composite plate, wherein the aluminum plate layer 111 is located in the liquid cooling chamber 240, and the copper plate layer 112 is used to connect with the battery module. On the one hand, the copper plate layer 112 has high strength, which can enhance the load-bearing performance of the flat plate 100, thereby preventing the deformation of the liquid cooling plate, and the aluminum plate layer 111 is light in weight and low in cost. Therefore, the copper-aluminum composite plate has the advantages of good rigidity, light weight and low cost; on the other hand, the thermal conductivity of the copper plate layer 112 is greater than that of the aluminum plate layer 111, and the copper plate layer 112 can facilitate the rapid conduction of heat from the heat source to the aluminum plate layer 111, and the thermal expansion coefficient of the aluminum plate layer 111 is greater than that of copper, and the aluminum plate layer 111 can quickly dissipate large thermal stress, thereby improving the heat dissipation performance of the flat plate 100. The second metal layer 221 may be an aluminum plate layer 111 , that is, the aluminum metal connecting portion 220 and the aluminum plate layer 111 of the flat plate 100 may be sealed and connected by brazing to reduce the manufacturing difficulty of the liquid cooling plate.

[0093] Embodiment 4:

[0094] See also Fig.10 The flat plate 100 may include a first metal layer 110 ; the metal connecting portion 220 may include a second metal layer 221 and a second plastic layer 222 disposed on the second metal layer 221 , the second plastic layer 222 is connected to the second metal layer 221 to form a metal-plastic plate, and the metal-plastic plate is used for thermal composite connection with the first metal layer 110 .

[0095] In this embodiment, the metal connection part 220 may be a metal plastic plate, and the metal plastic plate may be connected to the flat plate 100 by thermal bonding. For example, the metal plastic plate may include a second metal layer 221 and a second plastic layer 222, and the second plastic layer 222 may be bonded with the second metal layer 221 to form a metal plastic plate, wherein the second plastic layer 222 may be a plastic layer having a metal bonding function, thereby, the metal connection part 220 may be integrated with the first metal layer 110 by thermal bonding through the second plastic layer 222, thereby reducing the manufacturing difficulty of the liquid cooling plate and improving the production efficiency.

[0096] In this embodiment, the second plastic layer 222 and the second metal layer 221 may be pre-compounded to form a metal-plastic plate, and then the metal-plastic plate and the plastic part 210 are connected together.

[0097] Optionally, the second metal layer 221 may include one of the following structures: an aluminum plate layer 111 , a steel plate layer 113 or a stainless steel plate layer 114 .

[0098] For example, see Fig.10The second metal layer 221 may include an aluminum plate layer 111, that is, the metal connecting portion 220 may be made of an aluminum plate. For example, the aluminum plate may be composited with plastic to form an aluminum-plastic plate for thermal composite connection with the flat plate 100. The structure is simple and easy to implement.

[0099] For example, see Fig.11 The second metal layer 221 may include a steel plate layer 113, that is, the metal connecting portion 220 may be made of a steel plate. For example, the steel plate may be composited with plastic to form a steel-plastic plate for thermal composite connection with the flat plate 100. The structure is simple and easy to implement.

[0100] For example, see Fig.12 The second metal layer 221 may include a stainless steel plate layer 114, that is, the metal connecting portion 220 may be made of a stainless steel plate. For example, the stainless steel plate may be composited with plastic to form a stainless steel plastic plate for thermal composite connection with the flat plate 100. The structure is simple and easy to implement.

[0101] Optionally, the second plastic layer 222 includes one of the following structures:

[0102] Polyolefin plastic layer, modified polyolefin plastic layer or polyvinyl chloride plastic layer.

[0103] For example, the second plastic layer 222 may include a polyolefin plastic layer, that is, the second metal layer 221 may be compounded with the polyolefin plastic to form a metal-plastic plate, so as to achieve thermal compound connection between the metal-plastic plate and the flat plate 100 .

[0104] For example, the second plastic layer 222 may include a modified polyolefin plastic layer, that is, the second metal layer 221 may be compounded with the modified polyolefin plastic to form a metal-plastic plate, so as to achieve thermal compound connection between the metal-plastic plate and the flat plate 100 .

[0105] For example, the second plastic layer 222 may include a polyvinyl chloride plastic layer, that is, the second metal layer 221 may be compounded with polyvinyl chloride plastic to form a metal-plastic plate, so as to achieve thermal compound connection between the metal-plastic plate and the flat plate 100 .

[0106] The connection between the metal plastic plate and the plastic part 210 can be achieved by using a plastic-metal integral molding process.

[0107] Embodiment 5:

[0108] This embodiment provides a battery pack, wherein the battery pack includes the liquid cooling plate based on the metal-plastic composite plate as described in the above embodiment. Thus, the battery pack can have all the features and effects of the liquid cooling plate based on the metal-plastic composite plate, which will not be described in detail.

[0109] In summary, the present application discloses a liquid cooling plate and a battery pack based on a metal-plastic composite plate, wherein the liquid cooling plate based on the metal-plastic composite plate includes a flat plate and a metal-plastic composite flow channel plate, and the metal-plastic composite flow channel plate includes: a plastic part and a metal connecting part connected to the plastic part on all sides, and the plastic part is sealed to the flat plate through the metal connecting part to form a liquid cooling chamber. The present application provides metal connecting parts around the plastic part, and the plastic part is sealed to the flat plate through the metal connecting part, which can reduce the manufacturing difficulty of the liquid cooling plate, improve production efficiency, effectively reduce the weight and cost of the liquid cooling plate, and at the same time improve the thermal insulation performance of the liquid cooling system.

[0110] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A liquid cooling plate based on a metal-plastic composite plate, It is characterized in that include: flat; The metal-plastic composite flow channel plate comprises: a plastic part and a metal connecting part connected to the periphery of the plastic part, and the plastic part is sealed and connected to the flat plate through the metal connecting part to form a liquid cooling cavity.

2. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 1, It is characterized in that The metal connecting part and the plastic part are integrally formed.

3. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 1, It is characterized in that The plastic part comprises a first plastic layer. Step connection surfaces are arranged around the first plastic layer. The first plastic layer is connected to the metal connection part via the step connection surfaces.

4. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 3, It is characterized in that The first plastic layer is provided with a connecting groove, and the connecting groove has the step connecting surface; The metal connecting portion is embedded in the connecting groove, and the metal connecting portion is in contact with the step connecting surface.

5. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 3, It is characterized in that The metal connection part is provided with a concave notch matched with the step connection surface, and the metal connection part is staggeredly connected with the step connection surface through the concave notch.

6. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 3, It is characterized in that The step connection surface is arranged at the peripheral edge positions of the first plastic layer.

7. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 1, It is characterized in that The plate includes at least a first metal layer; The metal connection portion comprises at least a second metal layer; The metal connection portion is connected to the first metal layer through the second metal layer.

8. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 1, It is characterized in that The plate comprises: A first metal layer; a third metal layer, the third metal layer being connected to the first metal layer to form a composite metal plate; The metal connection portion comprises at least a second metal layer; The metal connection portion is connected to the first metal layer through the second metal layer; Wherein, the first metal layer comprises: an aluminum plate layer; The third metal layer includes a copper plate layer, and the third metal layer is connected with the first metal layer to form a copper-aluminum composite plate; The second metal layer includes an aluminum plate layer, and the third metal layer is sealed and connected to the second metal layer via the first metal layer.

9. The liquid cooling plate based on the metal-plastic composite plate as claimed in claim 1, It is characterized in that The plate includes a first metal layer; The metal connection part comprises a second metal layer and a second plastic layer arranged on the second metal layer, the second plastic layer and the second metal layer are connected to form a metal-plastic plate, and the metal-plastic plate is used for thermal composite connection with the first metal layer; Wherein, the second metal layer comprises one of the following structures: an aluminum plate layer, a steel plate layer or a stainless steel plate layer; The second plastic layer includes one of the following structures: Polyolefin plastic layer, modified polyolefin plastic layer or polyvinyl chloride plastic layer.

10. A battery pack, It is characterized in that The battery pack comprises a liquid cooling plate based on a metal-plastic composite plate as described in any one of claims 1 to 9.

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