Battery and electric device

Abstract

The utility model relates to the technical field of new energy heat management, and provides a battery and a power utilization device.The battery comprises a battery assembly, a cooling assembly and a refrigerant conveying pipeline, the cooling assembly is used for conducting heat exchange with the battery assembly, the refrigerant conveying pipeline communicates with the cooling assembly, and the refrigerant conveying pipeline comprises multiple layers of pipelines; a conveying flow channel allowing a refrigerant to circulate is arranged in the multi-layer pipeline, the multi-layer pipeline comprises an inner layer and an outer layer wrapping the outer side of the inner layer, and the inner layer comprises at least one of a low-precipitation layer and a blocking layer. According to the battery provided by the embodiment of the invention, the stability of the refrigerant conveying pipeline can be improved, the quality of the refrigerant can be maintained, and a relatively good thermal management effect can be realized.

Description

Technical Field

[0001] The present application relates to the field of new energy thermal management technology, and in particular to a battery and an electrical device. Background Art

[0002] With the increasing development of power batteries, the energy density of batteries is constantly increasing. However, the problem brought about by the increase in energy density is that the heat generated by the battery increases, so the cooling efficiency requirements of the battery thermal management system are becoming more and more stringent. The battery thermal management system usually transports refrigerant through pipelines and uses the refrigerant to cool the battery. The stability of the relevant pipelines is not good for the transmission of refrigerant. Utility Model Content

[0003] In view of this, the present application provides a battery and an electrical device that can solve the problem of poor stability of the refrigerant pipeline.

[0004] An embodiment of the first aspect of the present application proposes a battery, comprising a battery assembly, a cooling assembly for performing heat exchange with the battery assembly; a refrigerant transport pipeline connected to the cooling assembly, the refrigerant transport pipeline comprising a multi-layer pipeline, the multi-layer pipeline being provided with a transport channel for refrigerant circulation, the multi-layer pipeline comprising an inner layer and an outer layer covering the outer side of the inner layer, the inner layer comprising at least one of a low precipitation layer and a barrier layer.

[0005] The battery provided in the embodiment of the present application includes a refrigerant transport pipeline, the refrigerant transport pipeline includes a multi-layer pipeline, the multi-layer pipeline includes an inner layer and an outer layer coated on the outer side of the inner layer, the inner layer of the multi-layer pipeline includes at least one of a low precipitation layer and a barrier layer, wherein the low precipitation layer has the advantage of low precipitation, and the low precipitation layer can reduce the risk of refrigerant poisoning by the auxiliary agent in the refrigerant extraction pipeline, and the barrier layer has the advantage of high barrier properties, and the barrier layer can slow down or prevent the refrigerant from escaping through the multi-layer pipeline; the outer layer can play a protective role. The multi-layer pipeline is a multi-layer structure, and each multi-layer structure has different functions. The above-mentioned refrigerant transport pipeline has good stability, and the refrigerant transport pipeline can meet the needs of refrigerant transportation. The battery provided in the embodiment of the present application reduces the risk of quality degradation of the refrigerant during transportation, which is beneficial to maintaining the quality of the refrigerant and the thermal management effect of the battery.

[0006] In some embodiments, the inner layer includes the low precipitation layer and the barrier layer, the low precipitation layer is used to directly contact the refrigerant in the multi-layer pipeline, and the barrier layer is coated on the outside of the low precipitation layer.

[0007] The multilayer pipeline provided in the embodiment of the present application includes a low precipitation layer, a barrier layer and an outer layer arranged in sequence from the inside to the outside. The material of each layer is different and has different functions, so that the multilayer pipeline has the advantages of low precipitation, high barrier, high mechanical strength and high weather resistance.

[0008] In some embodiments, the multilayer pipeline further comprises a bonding layer; wherein the bonding layer is provided between the low precipitation layer and the barrier layer, and / or the bonding layer is provided between the barrier layer and the outer layer.

[0009] By adopting the above technical solution, the low precipitation layer and the barrier layer can be compounded through the bonding layer, and the barrier layer and the outer layer can also be compounded through the bonding layer. The bonding layer can compound different material layers together, and the manufacturing method of the multi-layer pipeline is relatively simple.

[0010] In some embodiments, the low precipitation layer is one of a PP layer, a PE layer, and a PPS layer.

[0011] By adopting the above technical scheme, the production process of the low precipitation layer does not contain any additives or contains only a small amount of additives, which has the advantage of low precipitation; the refrigerant is not easy to precipitate the additives to cause refrigerant poisoning and quality degradation when it contacts the low precipitation layer for a long time.

[0012] In some embodiments, the barrier layer includes one of a PPS layer and an EVOH layer.

[0013] By adopting the above technical solution, the barrier layer has a high barrier performance and can slow down or prevent the refrigerant from escaping through the multi-layer pipeline.

[0014] In some embodiments, the outer layer is one of a PPS layer, a PPA layer, a nylon 11 layer, and a nylon 12 layer.

[0015] By adopting the above technical solution, the outer layer can provide high mechanical strength and high weather resistance, so that the multi-layer pipeline can provide sufficient temperature resistance, pressure resistance and aging resistance in the use environment.

[0016] In some embodiments, the refrigerant transport pipeline further includes a pipeline joint, the pipeline joint is sleeved with an end of the multi-layer pipeline, and the pipeline joint is connected to the low precipitation layer or the outer layer.

[0017] The low precipitation layer and the outer layer in the multi-layer pipeline provided in the embodiment of the present application can both achieve good connection with the pipeline joint, which facilitates the layout of the thermal management system.

[0018] In some embodiments, the pipe joint is welded to the multi-layer pipe or connected by cold pressing.

[0019] By adopting the above technical solution, the multi-layer pipeline provided in the embodiment of the present application can be connected to the pipeline joint by welding or cold pressing, and the multi-layer pipeline can be conveniently and stably connected to the pipeline joint.

[0020] In some embodiments, the battery assembly includes a box body and a battery cell disposed in the box body, the cooling assembly includes a thermal management component disposed in the box body, the thermal management component is provided with a heat exchange channel for the flow of refrigerant, the thermal management component is used to exchange heat with the battery cell, and the refrigerant delivery pipeline is connected to the heat exchange channel.

[0021] By adopting the above technical solution, the battery can solve the problem that the quality of the refrigerant is easily degraded during long-term use, and the thermal management component is arranged in the box and uses the refrigerant to cool the battery cells, so the battery has a higher thermal management efficiency.

[0022] An embodiment of the second aspect of the present application provides an electrical device, comprising the battery provided in the first aspect.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 conventional technical descriptions 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 creative labor.

[0025] Figure 1 A schematic diagram of an electrical device provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of a battery assembly provided in one embodiment of the present application;

[0027] Figure 3 A schematic diagram of a partial structure of a battery provided in one embodiment of the present application;

[0028] Figure 4 for Figure 3 A partial enlarged view of part A of the battery shown;

[0029] Figure 5 A schematic diagram of the structure of a multi-layer pipeline provided in one embodiment of the present application;

[0030] Figure 6 for Figure 5 A cross-sectional view of the multi-layer pipeline along line BB is shown;

[0031] Figure 7A cross-sectional view of a multi-layer pipeline provided in another embodiment of the present application;

[0032] Figure 8 A cross-sectional view of a multi-layer pipeline provided in yet another embodiment of the present application;

[0033] Fig. 9 A cross-sectional view of a multi-layer pipeline provided in yet another embodiment of the present application.

[0034] The meanings of the marks in the figure are

[0035] 1000. Vehicles;

[0036] 100, battery; 200, controller; 300, motor;

[0037] 10. Battery assembly; 11. Box; 12. Battery cell;

[0038] 20. Refrigerant delivery pipeline;

[0039] 21. multi-layer pipeline; 201. conveying channel; 211. inner layer; 2111. low precipitation layer; 2112. barrier layer; 212. outer layer; 214. bonding layer;

[0040] 22. Pipeline joints;

[0041] 30. Cooling assembly; 31. Thermal management component; 311. Refrigerant inlet; 312. Refrigerant outlet. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0047] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0051] With the increasing development of power batteries, the energy density of batteries is constantly increasing. However, the problem brought about by the increase in energy density is that the heat generated by the battery increases, so the requirements for battery cooling efficiency are becoming more and more stringent. Batteries usually transport refrigerants through pipelines and use refrigerants to cool the batteries. The stability of the relevant pipelines is not good for the transmission of refrigerants.

[0052] In view of this, the present application provides a battery, including a battery assembly, a cooling assembly and a refrigerant delivery pipeline, the cooling assembly is used for heat exchange with the battery assembly, the refrigerant delivery pipeline includes a multi-layer pipeline, the multi-layer pipeline is provided with a delivery channel for refrigerant circulation, the multi-layer pipeline includes an inner layer and an outer layer coated on the outer side of the inner layer, the inner layer includes at least one of a low precipitation layer and a barrier layer. The above-mentioned refrigerant delivery pipeline includes a multi-layer pipeline, the inner layer of the multi-layer pipeline includes at least one of a low precipitation layer and a barrier layer, wherein the low precipitation layer has the advantage of low precipitation, the low precipitation layer can reduce the risk of refrigerant extraction of auxiliary agents in the pipeline and poisoning the refrigerant, the barrier layer has the advantage of high barrier properties, the barrier layer can slow down or prevent the refrigerant from escaping through the multi-layer pipeline; the outer layer can play a protective role. In this way, the multi-layer pipeline is a multi-layer structure, each of which has different functions, which improves the stability of the refrigerant delivery pipeline; the battery provided by the present application includes a multi-layer pipeline, which solves the problem of poor stability of the relevant refrigerant pipeline and reduces the risk of quality degradation of the refrigerant during transportation;.

[0053] The battery disclosed in the embodiment of the present application is used in an electric device, and the electric device disclosed in the embodiment of the present application may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0054] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0055] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0056] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0057] Please refer to Figure 2 , Figure 2 The exploded view of the battery assembly 10 provided in some embodiments of the present application, the battery assembly 10 includes a box 11 and a battery cell 12. The box 11 is used to provide a storage space for the battery cell 12, and the box 11 can adopt a variety of structures. In some embodiments, the box 11 may include a first part 111 and a second part 112, the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 12. The second part 112 can be a hollow structure with one end open, the first part 111 can be a plate-like structure, the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 can also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box 11 formed by the first part 111 and the second part 112 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0058] In the battery 100, there may be multiple battery cells 12, and the multiple battery cells 12 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 12 are both connected in series and in parallel. The multiple battery cells 12 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 12 is accommodated in the box 11; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 12 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 11. The battery 100 may also include other structures, for example, the battery 100 may also include a converging component for realizing electrical connection between the multiple battery cells 12.

[0059] Each battery cell 12 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 12 may be cylindrical, flat, rectangular, or in other shapes.

[0060] The battery cell 12 includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet and a negative electrode sheet. The battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode collector, the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode collector, the negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer, and the negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current can pass without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0061] The electrode assembly may further include an isolation membrane, and the material of the isolation membrane may be PP (polypropylene) or PE (polyethylene) or the like.

[0062] Please refer to Figure 3 and Figure 7The embodiment of the first aspect of the present application provides a battery 100. The battery 100 includes a battery assembly 10, a refrigerant delivery pipeline 20 and a cooling assembly 30. The cooling assembly 30 is used to perform heat exchange with the battery assembly 10, and the refrigerant delivery pipeline 20 is connected to the cooling assembly 30. The refrigerant delivery pipeline 20 includes a multi-layer pipeline 21, and a delivery channel 201 for refrigerant circulation is provided in the multi-layer pipeline 21. The multi-layer pipeline 21 includes an inner layer 211 and an outer layer 212 coated on the outer side of the inner layer 211. The inner layer 211 includes at least one of a low precipitation layer 2111 and a barrier layer 2112.

[0063] The battery assembly 10 is used to provide electric energy, and includes a box 11 and a battery cell 12 disposed in the box 11; the cooling assembly 20 can perform heat exchange with the battery assembly 10 to adjust the temperature of the battery assembly 10. The refrigerant delivery pipeline 20 is connected to the cooling assembly 30 to achieve the transmission of the refrigerant.

[0064] The multi-layer pipeline 21 can be arranged inside the battery 100 or outside the battery 100. The multi-layer pipeline 21 is a tube structure, and a delivery channel 201 is arranged inside the multi-layer pipeline 21, and the delivery channel 201 is used for circulating the refrigerant.

[0065] In the embodiments provided in the present application, the refrigerant may be tetrafluoroethane or other small molecule refrigerants.

[0066] The multilayer pipeline 21 includes an inner layer 211 and an outer layer 212. The outer layer 212 is coated on the outer side of the inner layer 211. Optionally, the outer layer 212 can be made of a material with high mechanical strength and high weather resistance, so that the multilayer pipeline 21 has better temperature resistance, pressure resistance, and aging resistance. The inner layer 211 and the outer layer 212 can be directly compounded to form an integrated multilayer pipeline 21, or they can be connected by an adhesive layer.

[0067] The inner layer 211 may be a single-layer structure or a multi-layer structure. Figure 6 As shown, in some embodiments, the inner layer 211 includes a low precipitation layer 2111 and a barrier layer 2112; Figure 7 As shown, in other embodiments, the inner layer 211 is only one layer, in which case the inner layer 211 may be a low precipitation layer or a barrier layer, or the inner layer 211 may be a material layer having both low precipitation and high barrier properties.

[0068] The low precipitation layer 2111 is a material layer with low precipitation. The low precipitation layer 2111 does not contain an additive or contains only a small amount of an additive during the production process. In this way, when the inner layer 211 includes the low precipitation layer 2111, the low precipitation layer 2111 is in contact with the refrigerant, and it is not easy for the refrigerant to be poisoned by the precipitation of the additive in the pipe body, and it is not easy to affect the quality of the refrigerant. In some cases, the refrigerant pipeline is made of a single layer of nylon material. Additives are added to nylon during production. During long-term use, the refrigerant will extract the additives, causing the refrigerant to be poisoned. The multilayer pipeline 21 of the embodiment of the present application can alleviate the problem of reducing the quality of the refrigerant due to the precipitation of additives in the existing pipeline.

[0069] The barrier layer 2112 refers to a material layer with high barrier properties. The molecules in the barrier layer 2112 are relatively dense. The barrier layer 2112 is used to block the refrigerant, which can reduce the risk of the refrigerant passing through the pipeline and escaping into the atmosphere. During long-term use, small molecules in the refrigerant may penetrate the multi-layer pipeline 21 and escape into the atmosphere, resulting in refrigerant loss and pollution to the atmosphere; when the inner layer 211 includes the barrier layer 2112, the barrier layer 2112 can block the refrigerant, alleviating the problem of refrigerant escaping and reducing the quality of the refrigerant.

[0070] The battery 100 provided in the embodiment of the present application includes a battery assembly 10, a cooling assembly 30 and a refrigerant delivery pipeline 20, the refrigerant delivery pipeline 20 includes a multi-layer pipeline 21, the multi-layer pipeline 21 includes an inner layer 211 and an outer layer 212 coated on the outside of the inner layer 211, the inner layer 211 of the multi-layer pipeline 21 includes at least one of a low precipitation layer 2111 and a barrier layer 2112, wherein the low precipitation layer 2111 has the advantage of low precipitation, and the low precipitation layer 2111 can reduce the risk of refrigerant extraction of auxiliary agents in the pipeline and poisoning the refrigerant, the barrier layer 2112 has the advantage of high barrier properties, and the barrier layer 2112 can slow down or prevent the refrigerant from escaping through the multi-layer pipeline 21; the outer layer 212 can play a protective role. The multi-layer pipeline 21 is a multi-layer structure, and each of the multi-layer structures has different functions. The above-mentioned refrigerant delivery pipeline 20 has good stability, and the refrigerant delivery pipeline 20 can adapt to the needs of refrigerant delivery; the battery 100 provided in the embodiment of the present application reduces the risk of quality degradation of the refrigerant during the delivery process, which is conducive to maintaining the quality of the refrigerant and achieving better thermal management effects.

[0071] Please refer to Figure 6 In some embodiments, the inner layer 211 includes a low precipitation layer 2111 and a barrier layer 2112 . The low precipitation layer 2111 is used to directly contact the refrigerant in the multi-layer pipeline 21 , and the barrier layer 2112 is coated on the outside of the low precipitation layer 2111 .

[0072] Specifically, the multi-layer pipeline 21 includes a low precipitation layer 2111, a barrier layer 2112 and an outer layer 212 arranged in sequence from the inside to the outside. The low precipitation layer 2111 directly contacts the refrigerant, reducing the risk of the auxiliary agent in the refrigerant extraction pipeline being poisoned; the barrier layer 2112 is located on the outside of the low precipitation layer 2111, and can play a better barrier role to the refrigerant.

[0073] The multilayer pipeline 21 provided in the embodiment of the present application includes a low precipitation layer 2111, a barrier layer 2112 and an outer layer 212 arranged in sequence from the inside to the outside. The material of each layer is different and has different functions, so that the multilayer pipeline 21 has the advantages of low precipitation, high barrier, high mechanical strength and high weather resistance.

[0074] In other embodiments, the number of layers of the low precipitation layer 2111 and / or the barrier layer 2112 may be more than one.

[0075] In other embodiments, it can be understood that the inner layer 211 may also only include the low precipitation layer 2111 or the barrier layer 2112. For example, when the low precipitation layer 2111 is a PPS layer, the low precipitation layer 2111 has the advantages of low precipitation and high barrier. At this time, the multi-layer pipeline 21 can omit a barrier layer 2112.

[0076] In some embodiments, the inner layer 211 and the outer layer 212 may be directly composited; in other embodiments, the inner layer 211 may also be bonded to the outer layer 212 .

[0077] Please refer to Figure 8 In some embodiments, the multilayer pipe 21 further includes a bonding layer 214 disposed between the inner layer 211 and the outer layer 212 .

[0078] Specifically, the adhesive layer 214 is wrapped around the outer side of the inner layer 211 , and the outer layer 212 is wrapped around the outer side of the adhesive layer 214 . The inner layer 211 and the outer layer 212 can be compounded through the adhesive layer 214 ; the adhesive layer 214 can be a PP layer or the like.

[0079] By adopting the above technical solution, the inner layer 211 and the outer layer 212 can be composited into one through the adhesive layer 214, the inner layer 211 and the outer layer 212 can be well connected, and the multi-layer pipeline 21 is easy to manufacture.

[0080] Please refer to Fig. 9 In some embodiments, the multilayer pipeline 21 includes a low precipitation layer 2111, a barrier layer 2112 and an outer layer 212. The multilayer pipeline 21 also includes a bonding layer 214. The bonding layer 214 is provided between the low precipitation layer 2111 and the barrier layer 2112, and / or the bonding layer 214 is provided between the barrier layer 2112 and the outer layer 212.

[0081] Optionally, the multilayer pipeline 21 includes a low precipitation layer 2111, a bonding layer 214, a barrier layer 2112, a bonding layer 214 and an outer layer 212 arranged in sequence from the inside to the outside. It can be understood that when two adjacent layers can be directly compounded, the bonding layer 214 can be omitted.

[0082] By adopting the above technical solution, the low precipitation layer 2111 and the barrier layer 2112 can be compounded through the bonding layer 214, and the barrier layer 2112 and the outer layer 212 can also be compounded through the bonding layer 214. The bonding layer 214 can compound different material layers together, and the manufacturing method of the multi-layer pipeline 21 is relatively simple.

[0083] In some embodiments, the low precipitation layer 2111 is one of a PP (Polypropylene) layer, a PE (polyethylene) layer, and a PPS (Polyphenylene Sulphide) layer, and the low precipitation layer 2111 is used to directly contact the refrigerant in the multi-layer pipeline 21.

[0084] The inner surface of the low precipitation layer 2111 constitutes the inner wall of the conveying channel 201, and the low precipitation layer 2111 is used to directly contact the refrigerant. The low precipitation layer 2111 is one of a PP layer, a PE layer, and a PPS layer. The low precipitation layer 2111 is made of the above materials, does not contain additives or has only a small amount of additives during its production process, is not easy to produce small molecular polymers, and has the advantage of low precipitation; the refrigerant is in long-term contact with the low precipitation layer 2111, and it is not easy to extract the additives to cause refrigerant poisoning and quality degradation.

[0085] In some embodiments, the barrier layer 2112 includes one of a PPS layer and an EVOH layer.

[0086] EVOH is an ethylene-vinyl alcohol copolymer, which not only exhibits excellent processing properties, but also has excellent blocking effects on gases, odors, fragrances, solvents, etc. Both the PPS layer and the EVOH layer are high barrier material layers, and the molecules of the material itself are relatively dense and tightly bound.

[0087] The barrier layer 2112 may be a single PPS layer or an EVOH layer. To improve the barrier performance, the barrier layer 2112 may also include both a PPS layer and an EVOH layer.

[0088] By adopting the above technical solution, the barrier layer 2112 includes one of a PPS layer and an EVOH layer, has high barrier properties, and can slow down or prevent the refrigerant from escaping through the multi-layer pipeline 21.

[0089] In some embodiments, the outer layer 212 is one of a PPS layer, a PPA (Polyphthalamide) layer, a nylon 11 (PA11) layer, and a nylon 12 (PA12) layer.

[0090] PPS is a high temperature resistant special polymer with high strength, high rigidity and low degradation characteristics; PPA is a synthetic resin with high hardness, high strength, good chemical resistance and low cost; PA11 is a thermoplastic resin with the characteristics of light weight, corrosion resistance, not easy to crack due to fatigue, good sealing and low resistance; PA12 is a semi-crystalline-crystalline thermoplastic material with good impact resistance and chemical stability. In addition, by setting the outer layer 212 as the above material layer, the outer layer 212 can be easily connected to the pipe joint 22.

[0091] By adopting the above technical solution, the outer layer 212 can provide high mechanical strength and high weather resistance, so that the multi-layer pipeline 21 can provide sufficient temperature resistance, pressure resistance and aging resistance in the use environment.

[0092] Please refer to Figures 3 to 9 In some embodiments, the refrigerant delivery pipeline 20 further includes a pipeline connector 22 , which is sleeved with the end of the multi-layer pipeline 21 , and the pipeline connector 22 is connected to the inner layer 211 or the outer layer 212 .

[0093] The pipe joint 22 is used to connect the multi-layer pipe 21 with adjacent pipes or devices. The pipe joint 22 can be sleeved on the outside of the multi-layer pipe 21, and the pipe joint 22 is connected to the outermost outer layer 212; or the pipe joint 22 can also be inserted into the inside of the multi-layer pipe 21, and the pipe joint 22 is connected to the innermost low precipitation layer 2111.

[0094] The inner layer 211 and the outer layer 212 of the multi-layer pipeline 21 provided in the embodiment of the present application can both achieve good connection with the pipeline joint 22, which facilitates the layout of the thermal management system.

[0095] In some embodiments, the pipe connector 22 is welded to the multi-layer pipe 21 or connected by cold pressing.

[0096] Exemplarily, the pipe joint 22 is sleeved on the end of the multilayer pipe 21, and the pipe joint 22 is welded to the outer layer 212. Optionally, in order to achieve a good welding effect, the pipe joint 22 and the outer layer 212 may have the same material, for example, the pipe joint 22 and the outer layer 212 are both PPS layers. It is understood that when the pipe joint 22 is inserted into the multilayer pipe 21, the pipe joint 22 may also be welded to the low precipitation layer 2111.

[0097] The pipe joint 22 can also be connected to the multilayer pipe 21 by cold pressing. Cold pressing connection refers to the use of pressure to cause plastic deformation of the materials of the connected parts to achieve solid connection. Cold pressing connection does not require hot melting or chemical welding, but is achieved through mechanical crimping technology.

[0098] By adopting the above technical solution, the multi-layer pipeline 21 provided in the embodiment of the present application can be connected to the pipeline joint 22 by welding or cold pressing, and the multi-layer pipeline 21 can be conveniently and stably connected to the pipeline joint 22.

[0099] In other embodiments, the pipe connector 22 may also be connected to the multi-layer pipe 21 by other physical or chemical means.

[0100] Please refer to Figures 5 to 9 The refrigerant transport pipeline provided in the embodiment of the present application includes a multi-layer pipeline 21, and the multi-layer pipeline 21 includes at least an inner layer 211 and an outer layer 212 covering the outer side of the inner layer 211. The multi-layer pipeline 21 is described below with some embodiments.

[0101] Embodiment 1

[0102] like Figure 6 As shown, the multilayer pipeline 21 includes a low precipitation layer 2111, a barrier layer 2112 and an outer layer 212 which are arranged in sequence from the inside to the outside, the low precipitation layer 2111 is one of a PP layer, a PE layer, and a PPS layer, the barrier layer 2112 includes one of a PPS layer and an EVOH layer, and the outer layer 212 is one of a PPS layer, a PPA layer, a nylon 11 layer, and a nylon 12 layer.

[0103] Embodiment 2

[0104] like Figure 7 As shown, the multi-layer pipeline 21 includes an inner layer 211 and an outer layer 212 which are arranged in sequence from the inside to the outside, and the inner layer 211 is a low precipitation layer or a barrier layer.

[0105] Embodiment 3

[0106] like Figure 8 As shown, the difference from the second embodiment is that the multilayer pipeline 21 further includes a bonding layer 214 , that is, the multilayer pipeline 21 includes an inner layer 211 , a bonding layer 214 and an outer layer 212 arranged from inside to outside.

[0107] Embodiment 4

[0108] like Fig. 9 As shown, the difference from the first embodiment is that the multilayer pipeline 21 also includes two bonding layers 214, that is, the multilayer pipeline 21 includes a low precipitation layer 2111, a bonding layer 214, a barrier layer 2112, a bonding layer 214 and an outer layer 212 arranged from the inside to the outside.

[0109] Please refer to Figures 2 to 9 In some embodiments, the battery assembly 10 includes a housing 11 and a battery cell 12 disposed in the housing 11; the cooling assembly 30 includes a thermal management component 31 disposed in the housing 11, and the thermal management component 31 is provided with a heat exchange channel (not shown) for the flow of refrigerant, and the thermal management component is used to exchange heat with the battery cell 12; the refrigerant delivery pipeline 20 is connected to the heat exchange channel.

[0110] The thermal management component 31 may be plate-shaped; the battery 100 may include multiple battery cells 12, and the thermal management component 31 may be arranged on one side of the battery cell 12. A heat exchange flow channel is provided in the thermal management component 31, and the flow of refrigerant in the heat exchange flow channel can cool or heat the battery cell 12.

[0111] The heat management component 31 is provided with a refrigerant inlet 311 and a refrigerant outlet 312, both of which are connected to the heat exchange flow channel to achieve the circulation of the refrigerant. The refrigerant inlet 311 and the refrigerant outlet 312 are respectively connected to the cooling / heating device outside the battery 100 through the refrigerant delivery pipeline 20.

[0112] like Figure 3 and Figure 4 As shown, the refrigerant delivery pipeline 20 is arranged inside the box 11 of the battery 100. It can be understood that the battery thermal management system 100 also includes a refrigerant delivery pipeline 20 arranged outside the battery 100, that is, the refrigerant delivery pipeline 20 is applicable to pipelines inside and outside the battery 100.

[0113] In some embodiments, the refrigerant may be a refrigerant such as tetrafluoroethane, and the battery adopts a direct cooling system for thermal management, that is, the battery 100 is thermally managed by utilizing the principle of latent heat of evaporation of the refrigerant.

[0114] The battery 100 provided in the embodiment of the present application can solve the problem that the quality of the refrigerant is easily degraded during long-term use, and the thermal management component 31 is arranged in the box body 11 and uses the refrigerant to cool the battery cell 12, so the battery 100 has a higher thermal management efficiency.

[0115] An embodiment of the second aspect of the present application provides an electrical device, comprising the battery 100 in the above embodiment, and the battery 100 is used to provide electrical energy.

[0116] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0117] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Battery components; A cooling assembly, used for performing heat exchange with the battery assembly; A refrigerant transport pipeline is connected to the cooling component, the refrigerant transport pipeline includes a multi-layer pipeline, a transport channel for circulating the refrigerant is provided in the multi-layer pipeline, the multi-layer pipeline includes an inner layer and an outer layer covering the outer side of the inner layer, the inner layer includes at least one of a low precipitation layer and a barrier layer.

2. The battery according to claim 1, characterized in that The inner layer includes the low precipitation layer and the barrier layer, the low precipitation layer is used to directly contact the refrigerant in the multi-layer pipeline, and the barrier layer is coated on the outside of the low precipitation layer.

3. The battery according to claim 2, characterized in that The multi-layer pipeline also includes a bonding layer; Wherein, the bonding layer is provided between the low precipitation layer and the barrier layer, and / or, The bonding layer is disposed between the barrier layer and the outer layer.

4. The battery according to claim 1, characterized in that The low precipitation layer is one of a PP layer, a PE layer and a PPS layer.

5. The battery according to claim 1, characterized in that The barrier layer includes one of a PPS layer and an EVOH layer.

6. The battery according to claim 1, characterized in that The outer layer is one of a PPS layer, a PPA layer, a nylon 11 layer and a nylon 12 layer.

7. The battery according to any one of claims 1 to 6, characterized in that The refrigerant delivery pipeline also includes a pipeline joint, which is sleeved with the end of the multi-layer pipeline and connected to the inner layer or the outer layer.

8. The battery according to claim 7, characterized in that The pipeline joint is welded to the multi-layer pipeline or connected by cold pressing.

9. The battery according to any one of claims 1 to 6, characterized in that The battery assembly includes a box body and a battery cell arranged in the box body. The cooling assembly includes a thermal management component arranged in the box body. A heat exchange channel for the flow of refrigerant is provided in the thermal management component. The thermal management component is used to exchange heat with the battery cell. The refrigerant delivery pipeline is connected to the heat exchange channel.

10. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 9.

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