Battery apparatus and electrical device

Abstract

Provided in the embodiments of the present application are a battery apparatus and an electrical device. The present application can improve the use performance of the battery apparatus. The battery apparatus comprises: a box body, a battery cell and a heat exchange apparatus. The box body is provided with a first accommodating cavity, the battery cell being accommodated in the first accommodating cavity, and the heat exchange apparatus being accommodated in the first accommodating cavity and being arranged close to the battery cell. The heat exchange apparatus is used for performing heat exchange with the battery cell. The heat exchange apparatus comprises a pipe body accommodating a heat exchange medium and a first protective layer arranged on the outer surface of the pipe body, the first protective layer being used for blocking the impact of emissions discharged from the battery cell on the pipe body. The heat exchange apparatus further comprises a second protective layer, the second protective layer being provided between the outer surface of the pipe body and the first protective layer, and / or, the second protective layer being arranged on the inner surface of the pipe body, and the second protective layer being used for thermal isolation for the pipe body.

Description

Battery device and electric appliance Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202411272927.0, filed on September 11, 2024, entitled “Battery device and electric appliance”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of batteries, and more particularly, to a battery device and an electric appliance. BACKGROUND

[0003] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0004] In the development of battery technology, in addition to improving the electrical performance of the battery device, the safety problem is also a problem that cannot be ignored, for example, the thermal runaway problem of the battery device. If the safety problem of the battery device cannot be guaranteed, the battery device cannot be used, which reduces the use performance of the battery device. Therefore, how to reduce the influence of thermal runaway diffusion of the battery monomer on the battery device and improve the use performance of the battery device has become a technical problem to be solved in the field. SUMMARY

[0005] The embodiments of the present application provide a battery device and an electric appliance, which can improve the use performance of the battery device.

[0006] In a first aspect, the present application provides a battery device, comprising: a box body having a first accommodating cavity; a battery monomer accommodated in the first accommodating cavity; and a heat exchange device accommodated in the first accommodating cavity and arranged close to the battery monomer, the heat exchange device being configured to exchange heat with the battery monomer; the heat exchange device comprises a pipeline body accommodating a heat exchange medium and a first protective layer arranged on an outer surface of the pipeline body, the first protective layer being configured to block the impact of discharge of the battery monomer on the pipeline body, the heat exchange device further comprises a second protective layer arranged between the outer surface of the pipeline body and the first protective layer, and / or the second protective layer is arranged on an inner surface of the pipeline body, and the second protective layer is configured to thermally insulate the pipeline body.

[0007] In the embodiments of the present application, the heat exchange device in the battery device is provided with a pipeline body containing heat exchange medium and a first protective layer arranged on the outer surface of the pipeline body, the first protective layer is used to block the impact of the exhaust of the battery monomer on the pipeline body, the heat exchange device is further provided with a second protective layer, the second protective layer is arranged between the outer surface of the pipeline body and the first protective layer, and / or the second protective layer is arranged on the inner surface of the pipeline body, the second protective layer is used to thermally insulate the pipeline body, in the case of thermal runaway of the battery monomer, the high-temperature or high-pressure gas exhausted from the battery monomer can be effectively blocked by the first protective layer, at the same time, the second protective layer can thermally insulate the pipeline body, so as to reduce the risk of surface ablation of the pipeline body caused by the high-temperature environment inside the battery device or leakage caused by melting of the pipeline body, improve the use performance of the heat exchange device, and thus improve the use performance of the battery device.

[0008] In some embodiments, at least part of the pipeline of the pipeline body includes a corrugated pipeline, and the second protective layer covers the corrugated pipeline. In this way, in the embodiments of the present application, at least part of the pipeline of the pipeline body is arranged to include a corrugated pipeline, so as to facilitate the assembly of the pipeline body, and at the same time, since the corrugated pipeline is prone to breakage or melting at high temperatures, by arranging the second protective layer to cover the corrugated pipeline, in the case of thermal runaway of the battery monomer, the second protective layer can thermally insulate the corrugated pipeline, so as to reduce the risk of surface ablation of the corrugated pipeline caused by the high-temperature environment inside the battery device or leakage caused by melting of the corrugated pipeline, improve the use performance of the heat exchange device, and thus improve the use performance of the battery device.

[0009] In some embodiments, the second protective layer is arranged between the outer surface of the pipeline body and the first protective layer, wherein, in a plane perpendicular to the extension direction of the pipeline body, the inner diameter r1 of the first protective layer and the outer diameter R2 of the second protective layer satisfy: r1-R2≥1mm, and the inner diameter r2 of the second protective layer and the outer diameter R3 of the pipeline body satisfy: r2-R3≥1mm.

[0010] In the embodiments of the present application, the second protective layer is arranged between the outer surface of the pipeline body and the first protective layer, in a plane perpendicular to the extension direction of the pipeline body, the inner diameter r1 of the first protective layer and the outer diameter R2 of the second protective layer are arranged to satisfy: r1-R2≥1mm, and the inner diameter r2 of the second protective layer and the outer diameter R3 of the pipeline body are arranged to satisfy: r2-R3≥1mm, so as to facilitate the assembly between the first protective layer, the second protective layer and the pipeline body, and improve the use performance of the heat exchange device.

[0011] In some embodiments, the second protective layer is arranged between the outer surface of the corrugated pipe and the first protective layer, and along the extension direction of the pipe body, the length L1 of the first protective layer and the length L2 of the second protective layer satisfy: L1≥L2, and the length L2 of the second protective layer and the length L3 of the corrugated pipe satisfy: L2-L3≥5mm.

[0012] In the embodiments of the present application, the second protective layer is arranged between the outer surface of the corrugated pipe and the first protective layer, and along the extension direction of the pipe body, the length L1 of the first protective layer and the length L2 of the second protective layer are arranged to satisfy: L1≥L2, and the length L2 of the second protective layer and the length L3 of the corrugated pipe are arranged to satisfy: L2-L3≥5mm, so as to balance the protection performance of the corrugated pipe and the assembly tolerance between the first protective layer, the second protective layer and the corrugated pipe, and improve the use performance of the heat exchange device.

[0013] In some embodiments, the first protective layer and the second protective layer are of an integrated structure. In this way, in the embodiments of the present application, the first protective layer and the second protective layer are arranged as an integrated structure, so as to balance the performance of blocking the impact of the exhaust emitted by the battery monomer on the pipe body and the performance of thermal isolation of the pipe body, and reduce the space occupied by the protective layer in the first accommodating cavity, improve the energy density of the battery monomer, thereby improving the use performance of the battery device, and saving the assembly process.

[0014] In some embodiments, the maximum thickness D1 of the integrated structure satisfies: 0mm<D1≤1mm. In this way, in the embodiments of the present application, the first protective layer and the second protective layer are arranged as an integrated structure, and the thickness D1 of the integrated structure satisfies: 0mm<D1≤1mm, so as to balance the performance of blocking the impact of the exhaust emitted by the battery monomer on the pipe body and the performance of thermal isolation of the pipe body, and also adjust the maximum thickness of the integrated structure to reduce the internal space of the first accommodating cavity occupied by the pipe body, improve the energy density of the battery monomer, thereby improving the use performance of the battery device, and saving the assembly process.

[0015] In some embodiments, the first protective layer is arranged on the outer surface of the pipe body, and the second protective layer is arranged on the inner surface of the pipe body, and in the plane perpendicular to the extension direction of the pipe body, the inner diameter r4 of the first protective layer and the outer diameter R6 of the pipe body satisfy: r4-R6≥1mm, and the outer diameter R5 of the second protective layer and the inner diameter r6 of the pipe body satisfy: 0mm≤r6-R5≤1mm.

[0016] In the embodiments of the present application, the first protective layer is arranged on the outer surface of the pipeline body, and the second protective layer is arranged on the inner surface of the corrugated pipeline. In a plane perpendicular to the extension direction of the pipeline body, the inner diameter r4 of the first protective layer and the outer diameter R6 of the pipeline body are arranged to satisfy r4-R6≥1mm, and the outer diameter R5 of the second protective layer and the inner diameter r6 of the pipeline body are arranged to satisfy 0mm≤r6-R5≤1mm, so as to facilitate the assembly between the first protective layer, the second protective layer and the pipeline body, and improve the use performance of the heat exchange device.

[0017] In some embodiments, the first protective layer is arranged on the outer surface of the corrugated pipeline, and the second protective layer is arranged on the inner surface of the corrugated pipeline. Along the extension direction of the pipeline body, the length L4 of the first protective layer and the length L6 of the corrugated pipeline satisfy L4-L6≥5mm, and the length L5 of the second protective layer and the length L6 of the corrugated pipeline satisfy L5-L6≥5mm.

[0018] In the embodiments of the present application, the first protective layer is arranged on the outer surface of the corrugated pipeline, and the second protective layer is arranged on the inner surface of the corrugated pipeline. Along the extension direction of the pipeline body, the length L4 of the first protective layer and the length L6 of the corrugated pipeline satisfy L4-L6≥5mm, and the length L5 of the second protective layer and the length L6 of the corrugated pipeline satisfy L5-L6≥5mm, so as to take into account the protective performance of the corrugated pipeline and the assembly tolerance between the first protective layer, the second protective layer and the corrugated pipeline, and improve the use performance of the heat exchange device.

[0019] In some embodiments, the second protective layer is heat-fused or adhesively connected to the inner surface of the pipeline body. In this way, in the embodiments of the present application, the second protective layer is heat-fused or adhesively connected to the inner surface of the pipeline body, so as to take into account the use performance of the pipeline body and the bonding strength between the second protective layer and the second surface, while the connection method is simple and convenient for processing and manufacturing.

[0020] In some embodiments, the heat-resistant temperature of the material of the first protective layer is greater than or equal to 500℃, and / or the heat-resistant temperature of the material of the second protective layer is greater than or equal to 500℃. In this way, in the embodiments of the present application, the heat-resistant temperature of the material of the first protective layer is set to be greater than or equal to 500℃, and / or the heat-resistant temperature of the material of the second protective layer is set to be greater than or equal to 500℃, so as to take into account the heat isolation performance of the second protective layer and the heat influence of the first protective layer on the second protective layer, reduce the risk of ablation or melting of the second protective layer caused by the first protective layer during temperature rise, and effectively protect the pipeline body, thereby improving the use performance of the heat exchange device.

[0021] In some embodiments, the material of the second protective layer comprises at least one of the following: glass fiber, mica sheet, aerogel, pre-oxidized fiber. In this way, in the embodiments of the present application, by setting the material of the second protective layer to comprise at least one of the following: glass fiber, mica sheet, aerogel, pre-oxidized fiber, the heat insulation performance of the second protective layer is effectively improved, the pipeline body is thermally insulated, and the use performance of the heat exchange device is improved.

[0022] In some embodiments, the material of the first protective layer comprises a phase change material or a ceramic composite tape. In this way, in the embodiments of the present application, by setting the material of the first protective layer to comprise a phase change material or a ceramic composite tape, the performance of the impact resistance or blocking of the high-temperature or high-pressure gas discharged by the battery monomer is effectively improved in the case of thermal runaway of the battery monomer, the pipeline body is effectively protected, and the use performance of the heat exchange device is improved.

[0023] In some embodiments, the heat exchange device further comprises a heat exchange plate and two pipeline bodies, the surface of the box body is provided with a liquid inlet and a liquid outlet in communication with the outside, one end of a first pipeline body of the two pipeline bodies is in communication with the liquid inlet, the other end of the first pipeline body is in communication with the heat exchange plate, one end of a second pipeline body of the two pipeline bodies is in communication with the liquid outlet, and the other end of the second pipeline body is in communication with the heat exchange plate.

[0024] In the embodiments of the present application, by setting the heat exchange device to further comprise a heat exchange plate and two pipeline bodies, and the surface of the box body is provided with a liquid inlet and a liquid outlet in communication with the outside, one end of a first pipeline body of the two pipeline bodies is in communication with the liquid inlet, the other end of the first pipeline body is in communication with the heat exchange plate, one end of a second pipeline body of the two pipeline bodies is in communication with the liquid outlet, and the other end of the second pipeline body is in communication with the heat exchange plate, the heat exchange medium provided by the external device can be circulated between the heat exchange device and the outside of the box body through the liquid inlet and the liquid outlet, so as to facilitate heat exchange with the battery monomer, reduce the risk of thermal runaway of the battery monomer, and improve the use performance of the battery device.

[0025] In a second aspect, a battery device is provided, and the battery device is used to provide electric energy for a power utilization device.

[0026] In some implementations, the power utilization device can be a vehicle, a ship, or a spacecraft, etc. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the drawings without creative labor.

[0028] Fig. 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application.

[0029] Fig. 2 is a structural schematic diagram of a battery device according to an embodiment of the present application.

[0030] Fig. 3 is a structural schematic diagram of a battery cell according to an embodiment of the present application.

[0031] Fig. 4 is an exploded structural schematic diagram of a battery cell according to another embodiment of the present application.

[0032] Fig. 5 is a structural schematic diagram of a battery device according to another embodiment of the present application.

[0033] Fig. 6 is a cross-sectional schematic diagram of a heat exchange device according to an embodiment of the present application.

[0034] Fig. 7 is a cross-sectional schematic diagram of a heat exchange device according to another embodiment of the present application.

[0035] Fig. 8 is a cross-sectional schematic diagram of a heat exchange device according to another embodiment of the present application.

[0036] Fig. 9 is a cross-sectional schematic diagram of a heat exchange device according to another embodiment of the present application.

[0037] Fig. 10 is a cross-sectional schematic diagram of a heat exchange device according to another embodiment of the present application.

[0038] Fig. 11 is a cross-sectional schematic diagram of a heat exchange device according to another embodiment of the present application.

[0039] Explanation of reference numerals: 1 - vehicle; 10 - battery device; 20 - battery cell; 30 - controller; 40 - motor; 11 - case; 111 - first portion; 112 - second portion; 112a - bottom plate; 112b - side plate; 21 - outer shell; 22 - electrode assembly; 211 - case; 212 - end cap; 213 - pressure relief mechanism; 222 - tab; 222a - positive electrode tab; 222b - negative electrode tab; 214 - electrode terminal; 214a - positive electrode terminal; 214b - negative electrode terminal; 23 - connecting member; 24 - insulating member; 50 - first accommodating cavity; 60 - heat exchange device; 610 - pipe body; 611 - first pipe body; 612 - second pipe body; 620 - outer surface; 630 - inner surface; 640 - corrugated pipe; 710 - first protective layer; 720 - second protective layer; 70 - integrated structure; 730 - liquid inlet; 740 - liquid outlet; 750 - heat exchange plate.

[0040] In the drawings, the drawings are not drawn according to the actual proportion. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" in the specification and claims of the present application and their any variants are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0044] Reference within this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from context, "X employs A or B" means that X employs A or B or both. The term "a" or "an" is defined as one or more unless explicitly indicated to the contrary or otherwise evident from the context. The term "plurality" is defined as two or more unless explicitly indicated to the contrary or otherwise evident from the context.

[0045] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] In this application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this application generally represents an "or" relationship between the front and rear associated objects.

[0047] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0048] In this application, "multiple" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two groups), and "multiple pieces" means more than two pieces (including two pieces).

[0049] If not specifically stated, all embodiments and optional embodiments of the application can be combined with each other to form new technical solutions.

[0050] If not specifically stated, all technical features and optional technical features of the application can be combined with each other to form new technical solutions.

[0051] As an example, the pressure relief mechanism can be integrally formed with the shell.

[0052] As an example, the pressure relief mechanism can also be provided separately from the shell and connected.

[0053] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for discharging gas inside the battery cell.

[0054] The discharge of the battery cell mentioned in the present application includes, but is not limited to, electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gas generated by reaction, flames, and the like.

[0055] The battery device mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0056] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0057] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0058] In some embodiments, the battery device can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0059] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0060] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0061] As an example, the box can include a first box and a second box. The first box and the second box are coupled so that an enclosed space is formed inside the box to accommodate the battery cell assembly. Here, the enclosed means covered or closed, and can be sealed or non-sealed. The first box can be a top cover or a bottom plate.

[0062] As an example, the box can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the box to accommodate the battery cell assembly.

[0063] In some embodiments, the box can be a part of a chassis structure of a vehicle. For example, a part of the box can be at least a part of a floor of the vehicle, or a part of the box can be at least a part of a cross beam and a longitudinal beam of the vehicle.

[0064] The technical solutions described in the embodiments of the present application are applicable to various battery cell using electric equipment, for example, mobile phone, portable equipment, notebook computer, electric vehicle, electric toy, electric tool, vehicle, ship and spacecraft, for example, spacecraft includes airplane, rocket, space shuttle and spaceship, etc.

[0065] At present, the development of battery device technology needs to consider various design factors, for example, energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters. In the development of battery device technology, in addition to improving the electrical performance of the battery device, the safety problem is also a problem that cannot be ignored. For example, the thermal runaway problem of the battery device. If the safety problem of the battery device cannot be guaranteed, the battery device cannot be used, which reduces the use performance of the battery device. Therefore, how to reduce the risk of thermal runaway diffusion of the battery cell to the battery device and improve the use performance of the battery device has become a technical problem to be solved in the field. Specifically, a pipeline body close to the battery cell is usually arranged on the inner wall of the box body of the battery device, and a gas protection layer, for example, a glass sleeve, is arranged on the outer periphery of the pipeline body to block the thermal shock of the high-temperature and high-pressure gas discharged from the battery cell to the pipeline body in the case of thermal runaway of the battery cell. However, in actual use process, although the gas protection layer plays a role in resisting thermal shock, the temperature of the gas protection layer itself will continue to increase with the increase of the temperature of the outside airflow, and the surface of the pipeline body will be ablated or the pipeline body will be melted, resulting in the risk of liquid leakage, which reduces the use performance of the battery device.

[0066] Therefore, the battery device and the electric equipment are provided. The battery device comprises a box body, a battery cell and a heat exchange device. The box body has a first accommodating cavity. The battery cell is accommodated in the first accommodating cavity. The heat exchange device is accommodated in the first accommodating cavity and is arranged close to the battery cell. The heat exchange device is used for heat exchange with the battery cell. The heat exchange device comprises a pipeline body accommodating a heat exchange medium and a first protective layer arranged on an outer surface of the pipeline body. The first protective layer is used for blocking the impact of the exhaust of the battery cell on the pipeline body. The heat exchange device further comprises a second protective layer. The second protective layer is arranged between the outer surface of the pipeline body and the first protective layer and / or the second protective layer is arranged on an inner surface of the pipeline body. The second protective layer is used for thermal isolation of the pipeline body. In this way, in the embodiment of the present application, by arranging the heat exchange device in the battery device, the heat exchange device comprises the pipeline body accommodating the heat exchange medium and the first protective layer arranged on the outer surface of the pipeline body. The first protective layer is used for blocking the impact of the exhaust of the battery cell on the pipeline body. The heat exchange device further comprises the second protective layer. The second protective layer is arranged between the outer surface of the pipeline body and the first protective layer and / or the second protective layer is arranged on the inner surface of the pipeline body. The second protective layer is used for thermal isolation of the pipeline body. In the case of thermal runaway of the battery cell, the high-temperature or high-pressure gas exhausted through the battery cell can be effectively blocked by the first protective layer. At the same time, the second protective layer can thermally isolate the pipeline body to reduce the risk of surface ablation of the pipeline body due to the high-temperature environment inside the battery device or leakage caused by melting of the pipeline body, improve the use performance of the heat exchange device, and thus improve the use performance of the battery device.

[0067] The technical solutions described in the embodiments of the present application are applicable to various electric equipment using the battery device.

[0068] The electric equipment can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the present application do not specially limit the above electric equipment.

[0069] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above-described power consumption equipment, but can also be applied to all battery-powered equipment. For the sake of brevity, the embodiments are described in detail below with the power consumption equipment being a vehicle as an example.

[0070] For example, as shown in FIG. 1, which is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application, the vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1 can be provided with a motor 40, a controller 30, and a battery device 10 inside, and the controller 30 is used to control the power supply of the battery device 10 to the motor 40. For example, the battery device 10 can be arranged at the bottom, the front, or the rear of the vehicle 1. The battery device 10 can be used for power supply of the vehicle 1, for example, the battery device 10 can be used as an operating power source of the vehicle 1, and is used for the circuit system of the vehicle 1, for example, for the power demand of the vehicle 1 during starting, navigation, and operation. In another embodiment of the present application, the battery device 10 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0071] In order to meet different power consumption requirements, the battery device 10 in the embodiments of the present application can include at least one battery monomer assembly, and the battery monomer assembly includes a plurality of battery monomers. The plurality of battery monomers can be electrically connected by series connection, parallel connection, or mixed connection to form the battery device 10, wherein the mixed connection refers to a mixture of series connection and parallel connection. The battery device 10 can also be referred to as a battery pack. For example, the plurality of battery monomers can first be connected by series connection, parallel connection, or mixed connection to form a battery module, and the plurality of battery modules can be connected by series connection, parallel connection, or mixed connection to form the battery device 10. That is, the plurality of battery monomers can be directly connected to form the battery device 10, or the plurality of battery monomers can be first connected to form a battery module, and then the battery module can be connected to form the battery device 10.

[0072] For example, as shown in FIG. 2, which is a structural schematic diagram of a battery device 10 according to an embodiment of the present application, the battery device 10 can include a plurality of battery monomers 20. The battery device 10 can also include a box body 11 (or a cover body), and the box body 11 has a hollow structure, and the plurality of battery monomers 20 are accommodated in the box body 11. For example, the plurality of battery monomers 20 are combined by parallel connection, series connection, or mixed connection and then placed in the box body 11.

[0073] As shown in FIG. 2, the box 11 can include two parts, here referred to as a first part 111 and a second part 112, which are buckled together. The shapes of the first part 111 and the second part 112 can be determined according to the shape of the combination of the plurality of battery monomers 20, and the first part 111 and the second part 112 can each have an opening. For example, the first part 111 and the second part 112 can each be a hollow cuboid and each have only one face as an opening face, the opening of the first part 111 and the opening of the second part 112 are oppositely arranged, and the first part 111 and the second part 112 are buckled together to form a box 11 with a closed cavity. Among them, the second part 112 can include a bottom plate 112a, a side plate 112b and a beam. The plurality of battery monomers 20 are combined in parallel or in series or in a hybrid combination and placed in the box 11 formed after the buckling of the first part 111 and the second part 112.

[0074] Optionally, the battery device 10 can also include other structures, which will not be described one by one here. For example, the battery device 10 can also include a current collecting component for realizing the electrical connection between the plurality of battery monomers 20, such as parallel connection or series connection or hybrid connection. Specifically, the current collecting component can realize the electrical connection between the battery monomers 20 by connecting the electrode terminals of the battery monomers 20. Further, the current collecting component can be fixed to the electrode terminals of the battery monomers 20 by welding. The electrical energy of the plurality of battery monomers 20 can be further led out through the box by a conductive mechanism. Optionally, the conductive mechanism can also belong to the current collecting component.

[0075] FIG. 3 shows a structural schematic diagram of the battery monomer 20 provided by an embodiment of the present application, and FIG. 4 shows an exploded structural schematic diagram of the battery monomer 20 provided by another embodiment of the present application. As shown in FIGS. 3 and 4, the battery monomer 20 of the embodiments of the present application can include an outer shell 21 and an electrode assembly 22, the outer shell 21 has a closed containing space, and the electrode assembly 22 is placed in the containing space in the outer shell 21. The outer shell 21 can include a shell body 211 and an end cover 212, the shell body 211 is a hollow structure with at least one opening; and the end cover 212 is used to buckle with the shell body 211 to form the outer shell 21 with a closed containing space.

[0076] It should be understood that the battery monomer 20 in the embodiments of the present application can be a secondary battery, which refers to a battery monomer 20 that can be activated by charging after discharging to continue to be used. For example, the battery monomer 20 can be a lithium ion battery, a sodium ion battery, a sodium-lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0077] The electrode assembly 22 in the embodiments of the present application comprises a positive electrode, a negative electrode, and a separator arranged between the negative electrode and the positive electrode. During the charging and discharging of the battery cell 20, active ions (e.g. lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator arranged between the positive electrode and the negative electrode can prevent the short circuit of the positive electrode and the negative electrode, and can also allow the active ions to pass through.

[0078] In some embodiments, the end cover 212 can be a plate-shaped structure for covering the opening of the shell 211. In other embodiments, the end cover 212 has a similar structure to the shell 211, i.e. both the shell 211 and the end cover 212 are hollow structures with an opening, and the openings of the two are connected to form the shell 21 with a closed accommodation space.

[0079] It should be understood that if the end cover 212 is a plate-shaped structure, the shell 211 can be a hollow structure with one or more openings, for example, if the shell 211 is a hollow structure with one opening, the end cover 212 can be one; if the shell 211 is a hollow structure with openings at opposite ends, the end cover 212 can be two, and the two end covers 212 cover the openings at the two ends of the shell 211 respectively.

[0080] The shell 21 can have various shapes, such as a cylinder, a cuboid, or other polyhedrons. For example, as shown in FIGS. 3 and 4, in the embodiments of the present application, the shell 21 is mainly described as a cuboid structure.

[0081] It should be understood that the end cover 212 of the embodiments of the present application is used to cooperate with the shell 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cover 212 can be adapted to the shape of the shell 211, as shown in FIGS. 3 and 4, the shell 211 is a cuboid structure, and the end cover 212 is a rectangular plate-shaped structure adapted to the shell 211.

[0082] In some embodiments, the shell 211 can be a hollow structure with at least one opening, and the shape of the end cover 212 can be adapted to the shape of the shell 211, and the end cover 212 is used to cover the opening of the shell 211 to isolate the internal environment of the battery cell 20 from the external environment. If the shell 211 is a hollow structure with one opening, the end cover 212 can be one.

[0083] The material of the shell 211 of the embodiments of the present application can include one or more, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cover 212 can also be one or more, such as copper, iron, aluminum, steel, aluminum alloy, etc. Among them, the material of the end cover 212 can be the same as or different from the material of the shell 211, and the materials of different walls of the shell 211 can also be the same or different.

[0084] The end cover 212 of the embodiment of the present application can be any one wall of the shell 21. For example, the end cover 212 can be the largest wall among the walls included in the shell 21, or the smallest wall, or can be other walls, and the embodiment of the present application is not limited thereto. Alternatively, the end cover 212 can also be other structures. For example, the end cover 212 can also be a groove structure with an opening to cover the opening of the shell 211, and the embodiment of the present application is not limited thereto.

[0085] It should be understood that the battery cell 20 also includes electrode terminals 214. The electrode terminals 214 of the embodiment of the present application are used to be electrically connected with the electrode assembly 22 inside the battery cell 20 to output the electric energy of the battery cell 20. As shown in FIGS. 3-4, the battery cell 20 can include at least two electrode terminals 214, which can include at least one positive electrode terminal 214a and at least one negative electrode terminal 214b. The positive electrode terminal 214a is used to be electrically connected with the positive tab 222a of the electrode assembly 22, and the negative electrode terminal 214b is used to be electrically connected with the negative tab 222b of the electrode assembly 22. The positive electrode terminal 214a can be directly connected with the positive tab 222a, or can be indirectly connected, and the negative electrode terminal 214b can be directly connected with the negative tab 222b, or can be indirectly connected. For example, the positive electrode terminal 214a can be electrically connected with the positive tab 222a through a connecting member 23, and the negative electrode terminal 214b can be electrically connected with the negative tab 222b through a connecting member 23. It should be understood that in the embodiment of the present application, the positive tab 222a and the negative tab 222b can be collectively referred to as a tab 222.

[0086] In the embodiment of the present application, the walls of the shell 211 and the walls of the end cover 212 are collectively referred to as the walls of the battery cell 20. For the rectangular battery cell 20 shown in FIGS. 3 and 4, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the combined one or more electrode assemblies 22. For example, the shell 211 can be a hollow rectangular or square or cylindrical body, and one of the faces of the shell 211 has an opening so that the one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow rectangular or square body, one of the planes of the shell 211 is an opening plane, i.e., the plane does not have a wall body so that the inside and outside of the shell 211 are in communication. When the shell 211 can be a hollow cylindrical body, the end face of the shell 211 is an opening plane, i.e., the end face does not have a wall body so that the inside and outside of the shell 211 are in communication. The end cover 212 covers the opening and is connected with the shell 211 to form a closed cavity for placing the electrode assembly 22. The shell 211 is filled with an electrolyte, such as an electrolyte solution.

[0087] In the battery cell 20, the electrode assembly 22 is a component in which electrochemical reactions occur in the battery cell 20. According to actual use requirements, the electrode assembly 22 in the housing 211 can be one or multiple. For example, as shown in FIG. 4, two electrode assemblies 22 are arranged in the battery cell 20. The electrode assembly 22 can be a cylinder, a cuboid, etc. If the electrode assembly 22 is a cylinder structure, the housing 211 can also be a cylinder structure. If the electrode assembly 22 is a cuboid structure, the housing 211 can also be a cuboid structure.

[0088] In the battery cell 20, the electrode assembly 22 is a component in which electrochemical reactions occur in the battery cell 20. According to actual use requirements, the electrode assembly 22 in the housing 211 can be one or multiple. For example, as shown in FIG. 4, two electrode assemblies 22 are arranged in the battery cell 20. The electrode assembly 22 can be a cylinder, a cuboid, etc. If the electrode assembly 22 is a cylinder structure, the housing 211 can also be a cylinder structure. If the electrode assembly 22 is a cuboid structure, the housing 211 can also be a cuboid structure. In the embodiment of the present application, the material of the housing 211 can include the following materials: copper, iron, aluminum, steel, aluminum alloy, etc.

[0089] The pressure relief mechanism 213 arranged on the battery cell 20 can be various possible pressure relief mechanisms 213. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism configured to be able to break when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0090] In some implementations, the battery cell 20 can further be provided with an insulating piece 24 arranged in the accommodation space of the housing 211, and the insulating piece 24 can be a hollow structure with one end or multiple ends forming an opening, and the accommodation space in the hollow structure is used to accommodate the electrode assembly 22, so as to improve the insulation performance of the battery cell 20.

[0091] FIG. 5 shows a structural schematic diagram of a battery device 10 provided by another embodiment of the present application. FIG. 6 shows a cross-sectional schematic diagram of a heat exchange device 60 provided by an embodiment of the present application. FIG. 7 shows a cross-sectional schematic diagram of a heat exchange device 60 provided by another embodiment of the present application. FIG. 8 shows a cross-sectional schematic diagram of a heat exchange device 60 provided by another embodiment of the present application. FIG. 9 shows a cross-sectional schematic diagram of a heat exchange device 60 provided by another embodiment of the present application. FIG. 10 shows a cross-sectional schematic diagram of a heat exchange device 60 provided by another embodiment of the present application. FIG. 11 shows a cross-sectional schematic diagram of a heat exchange device 60 provided by another embodiment of the present application.

[0092] It should be understood that the cross-sectional schematic view of the pipe body 610 in the heat exchange device 60 shown in FIG. 6, FIG. 8 and FIG. 10 can be a cross-sectional view of different pipe bodies 610 to show the internal structure of the pipe body 610. The cross-sectional schematic view of the pipe body 610 in the heat exchange device 60 shown in FIG. 7, FIG. 9 and FIG. 11 can be a cross-sectional schematic view of different pipe bodies 610 in a direction perpendicular to the extension direction of the pipe body 610. It should also be understood that the cross-sectional schematic view of the pipe body 610 in the heat exchange device 60 shown in FIG. 6 and FIG. 7 can be a cross-sectional schematic view of the same pipe body 610 in different directions. The cross-sectional schematic view of the pipe body 610 in the heat exchange device 60 shown in FIG. 8 and FIG. 9 can be a cross-sectional schematic view of the same pipe body 610 in different directions. The cross-sectional schematic view of the pipe body 610 in the heat exchange device 60 shown in FIG. 10 and FIG. 11 can be a cross-sectional schematic view of the same pipe body 610 in different directions.

[0093] In some implementations, as shown in FIG. 5 to FIG. 11, the battery device 10 includes a box body 11 having a first accommodating cavity 50, a battery cell 20 accommodated in the first accommodating cavity 50, and a heat exchange device 60 accommodated in the first accommodating cavity 50 and arranged close to the battery cell 20, the heat exchange device 60 being configured to exchange heat with the battery cell 20. The heat exchange device 60 includes a pipe body 610 accommodating a heat exchange medium, and a first protective layer 710 arranged on the outer surface 620 of the pipe body 610, the first protective layer 710 being configured to block the impact of the exhaust emitted by the battery cell 20 on the pipe body 610. The heat exchange device 60 further includes a second protective layer 720 arranged between the outer surface 620 of the pipe body 610 and the first protective layer 710, and / or the second protective layer 720 is arranged on the inner surface 630 of the pipe body 610, the second protective layer 720 being configured to thermally insulate the pipe body 610.

[0094] It should be understood that the first accommodating cavity 50 of the box body 11 can be an open accommodating cavity or a closed accommodating cavity. For example, in the case that the first accommodating cavity 50 is an open accommodating cavity, at least one opening can be arranged at the end of the first accommodating cavity 50, the opening being configured to be sealingly connected with a box cover.

[0095] It should also be understood that the pressure relief mechanism 213 in the battery cell 20 of the embodiments of the present application refers to an element or component that is actuated when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold value to release the internal pressure or temperature. The threshold value is designed differently according to different design requirements. The threshold value can depend on the material of one or more of the positive electrode tab, the negative electrode tab, the electrolyte and the separator in the battery cell 20.

[0096] As referred to in the present application, "actuation" of the pressure relief mechanism 213 means that the pressure relief mechanism 213 is activated or brought to a state so that the internal pressure and temperature of the battery cell 20 can be released. The actuation of the pressure relief mechanism 213 can include, but is not limited to, at least one of the following: at least a portion of the pressure relief mechanism 213 is broken, cracked, torn or opened, etc. During the actuation of the pressure relief mechanism 213, the high-temperature and high-pressure substances inside the battery cell 20 can be discharged as the discharge material from the actuated portion. In this way, the battery cell 20 can be depressurized and cooled at a controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0097] As referred to in the present application, the discharge material discharged from the battery cell 20 can include, but is not limited to, the following: electrolyte, positive and negative electrode sheets dissolved or split, fragments of the insulating member 24, high-temperature and high-pressure gas generated by reaction, flame, etc.

[0098] It should also be understood that the first protective layer 710 is arranged on the outer surface 620 of the pipeline body 610, which means that the first protective layer 710 can wrap at least part of the outer surface of the pipeline body 610, and the first protective layer 710 and the outer surface 620 can not be fixedly connected, that is, there can be a gap between the first protective layer 710 and the outer surface 620.

[0099] In some implementations, the second protective layer 720 can be arranged between the outer surface 620 and the first protective layer 710, which means that the second protective layer 720 can wrap at least part of the outer surface 620 of the pipeline body 610, and the first protective layer 710 can wrap the outer periphery of the side of the second protective layer 720 away from the pipeline body 610. It should be understood that the second protective layer 720 and the first protective layer 710 can not be fixedly connected, and the second protective layer 720 and the outer surface 620 can not be fixedly connected, that is, there can be a gap between the second protective layer 720 and the first protective layer 710, and there can be a gap between the second protective layer 720 and the outer surface 620.

[0100] It should also be understood that the shapes of the first protective layer 710 and the second protective layer 720 in the embodiments of the present application can be set according to actual needs, and exemplarily, the first protective layer 710 and the second protective layer 720 can both be hollow tubular structures.

[0101] It should also be understood that the heat exchange medium contained in the pipeline body 610 can include at least one of the following: water-based coolant, ethylene glycol-based coolant, mineral oil, synthetic oil, and the like.

[0102] In some implementations, the second protective layer 720 can also be arranged on the inner surface 630 of the pipe body 610, that is, the second protective layer 720 can be connected to at least part of the inner surface 630 of the pipe body 610. It should be understood that when the second protective layer 720 is arranged on the inner surface 630, if the second protective layer 720 is detached or not fixedly connected to the inner surface 630, the heat insulation performance of the pipe body 610 will be reduced, which will cause the risk of ablation or melting of the pipe body 610, and thus it is necessary to fixedly connect the second protective layer 720 to at least part of the inner surface 630 of the pipe body 610, for example, the second protective layer 720 and the inner surface 630 of the pipe body 610 are connected by thermal fusion or adhesive connection.

[0103] It should also be understood that in some implementations, the heat exchange device 60 in the embodiments of the present application can include two second protective layers 720, one of which is arranged between the outer surface 620 and the first protective layer 710, and the other of which is arranged on the inner surface 630 of the pipe body 610.

[0104] In the embodiments of the present application, by arranging the pipe body 610 containing the heat exchange medium and the first protective layer 710 arranged on the outer surface 620 of the pipe body 610 in the heat exchange device 60 in the battery device 10, the first protective layer 710 is used to block the impact of the exhaust emitted by the battery monomer 20 on the pipe body 610, the heat exchange device 60 is also provided with a second protective layer 720, the second protective layer 720 is arranged between the outer surface 620 of the pipe body 610 and the first protective layer 710, and / or the second protective layer 720 is arranged on the inner surface 630 of the pipe body 610, the second protective layer 720 is used to thermally insulate the pipe body 610, in the case of thermal runaway of the battery monomer 20, the high-temperature or high-pressure gas emitted by the battery monomer 20 can be effectively blocked by the first protective layer 710, and at the same time the second protective layer 720 can thermally insulate the pipe body 610 to reduce the risk of ablation of the surface of the pipe body 610 or melting of the pipe body 610 caused by the high-temperature environment inside the battery device 10, improve the use performance of the heat exchange device 60, and thus improve the use performance of the battery device 10.

[0105] In some implementations, as shown in FIGS. 6-11, at least part of the pipe body 610 includes a corrugated pipe 640, and the second protective layer 720 covers the corrugated pipe 640.

[0106] It should be understood that the at least part of the pipeline body 610 in the embodiments of the present application includes the corrugated pipeline 640, which means that at least part of the pipeline body 610 can be provided as the corrugated pipeline 640. The corrugated pipeline 640 can absorb thermal expansion and contraction of the pipeline due to temperature changes, reduce stress of the pipeline, and thus reduce the risk of rupture of the pipeline body 610. In addition, the corrugated pipeline 640 has good elasticity to absorb and buffer vibrations caused by flow of the heat exchange medium or external impact, and reduce the influence of the pipeline body 610 on other equipment inside the battery device 10. The corrugated pipeline 640 has good flexibility to adapt to various complex installation environments, so that the pipeline body 610 can be arranged in a flexible manner, facilitating installation and maintenance.

[0107] It should also be understood that the second protective layer 720 covers the corrugated pipeline 640, which means that when the second protective layer 720 is arranged on the outer surface of the corrugated pipeline 640, the second protective layer 720 can completely wrap the outer surface of the corrugated pipeline 640 to protect the corrugated pipeline 640, and when the second protective layer 720 is arranged on the inner surface of the corrugated pipeline 640, the second protective layer 720 is fixedly connected with the entire inner surface of the corrugated pipeline 640 to protect the corrugated pipeline 640.

[0108] It should also be understood that the arrangement area of the corrugated pipeline 640 in the pipeline body 610 can be arranged according to actual needs. For example, as shown in FIG. 5, the corrugated pipeline 640 can be arranged in the area close to the liquid inlet 730 and / or the area close to the liquid outlet 740 of the pipeline body 610, so as to facilitate assembly of the pipeline body 610.

[0109] In the embodiments of the present application, at least part of the pipeline body 610 is arranged as the corrugated pipeline 640 to facilitate assembly of the pipeline body 610. In addition, since the corrugated pipeline 640 is prone to breakage or melt-through at high temperatures, the second protective layer 720 is arranged to cover the corrugated pipeline 640. In the case of thermal runaway of the battery monomer 20, the second protective layer 720 can thermally isolate the corrugated pipeline 640 to reduce the risk of surface ablation of the corrugated pipeline 640 or melt-through of the corrugated pipeline 640 caused by high-temperature environment inside the battery device 10, improve the use performance of the heat exchange device 60, and thus improve the use performance of the battery device 10.

[0110] It should be understood that, as shown in FIGS. 6 and 7, in the case where the second protective layer 720 is arranged between the outer surface 620 and the first protective layer 710, the inner diameter of the first protective layer 710 in the embodiment of the present application can be represented by r1, the outer diameter of the first protective layer 710 can be represented by R1, the inner diameter of the second protective layer 720 can be represented by r2, the outer diameter of the second protective layer 720 can be represented by R2, the inner diameter of the pipeline body 610 can be represented by r3, and the outer diameter of the pipeline body 610 can be represented by R3.

[0111] In some implementations, as shown in FIGS. 6 and 7, the second protective layer 720 is arranged between the outer surface 620 of the pipeline body 610 and the first protective layer 710, wherein, in a plane perpendicular to the extension direction of the pipeline body 610, the inner diameter r1 of the first protective layer 710 and the outer diameter R2 of the second protective layer 720 satisfy: r1-R2≥1 mm, and the inner diameter r2 of the second protective layer 720 and the outer diameter R3 of the pipeline body 610 satisfy: r2-R3≥1 mm.

[0112] For example, in a plane perpendicular to the extension direction of the pipeline body 610, the difference r1-R2 between the inner diameter r1 of the first protective layer 710 and the outer diameter R2 of the second protective layer 720 can be set to 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc., or a value within a range obtained by any two of the above-mentioned values. For example, the difference r2-R3 between the inner diameter r2 of the second protective layer 720 and the outer diameter R3 of the pipeline body 610 can be set to 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc., or a value within a range obtained by any two of the above-mentioned values.

[0113] In the embodiment of the present application, the second protective layer 720 is arranged between the outer surface 620 of the pipeline body 610 and the first protective layer 710, in a plane perpendicular to the extension direction of the pipeline body 610, by setting the inner diameter r1 of the first protective layer 710 and the outer diameter R2 of the second protective layer 720 to satisfy: r1-R2≥1 mm, and setting the inner diameter r2 of the second protective layer 720 and the outer diameter R3 of the pipeline body 610 to satisfy: r2-R3≥1 mm, so as to facilitate the assembly between the first protective layer 710, the second protective layer 720 and the pipeline body 610, and improve the use performance of the heat exchange device 60.

[0114] In some implementations, as shown in FIG. 6, the second protective layer 720 is arranged between the outer surface 620 of the corrugated pipe 610 and the first protective layer 710, wherein along the extension direction of the pipe body 610, the length L1 of the first protective layer 710 and the length L2 of the second protective layer 720 satisfy: L1≥L2, and the length L2 of the second protective layer 720 and the length L3 of the corrugated pipe 640 satisfy: L2-L3≥5mm.

[0115] Exemplarily, the difference L2-L3 between the length L2 of the second protective layer 720 and the length L3 of the corrugated pipe 640 can be set to 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., or a value within the range obtained by any two of the above combinations.

[0116] In the embodiments of the present application, the second protective layer 720 is arranged between the outer surface 620 of the corrugated pipe 610 and the first protective layer 710, and along the extension direction of the pipe body 610, the length L1 of the first protective layer 710 and the length L2 of the second protective layer 720 are set to satisfy: L1≥L2, and the length L2 of the second protective layer 720 and the length L3 of the corrugated pipe 640 are set to satisfy: L3-L1≥5mm, so as to take into account the protection performance of the corrugated pipe 640 and the assembly tolerance between the first protective layer 710, the second protective layer 720 and the corrugated pipe 640, and improve the use performance of the heat exchange device 60.

[0117] In some implementations, as shown in FIG. 8 and FIG. 9, the first protective layer 710 and the second protective layer 720 are of an integrated structure 70.

[0118] It should be understood that in the embodiments of the present application, the first protective layer 710 and the second protective layer 720 of the pipe body are of an integrated structure 70, which means that the first protective layer 710 for blocking the impact of the exhaust emitted by the battery monomer 20 on the pipe body 610 and the second protective layer 720 for achieving thermal isolation of the pipe body 610 are connected by heat pressing or fixedly connected, so that the first protective layer 710 and the second protective layer 720 form an integrated structure, and the integrated structure 70 formed after the connection is wrapped on the outer surface 620 of the pipe body 610 to protect the pipe body 610.

[0119] In the embodiment of the present application, by setting the first protective layer 710 and the second protective layer 720 as the integrated structure 70, the performance of blocking the impact of the exhaust emitted by the battery monomer 20 on the pipeline body 610 and the performance of thermal isolation of the pipeline body 610 of the integrated structure 70 are taken into account, the space occupied by the integrated structure 70 in the first containing cavity 50 can be reduced, the energy density of the battery monomer 20 is improved, thereby improving the use performance of the battery device 10, and the assembly process is saved.

[0120] In some implementations, the maximum thickness D1 of the integrated structure 70 satisfies: 0mm < D1≤1mm.

[0121] Exemplarily, the maximum thickness D1 of the integrated structure 70 can be set to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., or a value within the range obtained by any two of the above combinations.

[0122] In the embodiment of the present application, by setting the first protective layer 710 and the second protective layer 720 as the integrated structure 70, and setting the maximum thickness D1 of the integrated structure 70 to satisfy: 0mm < D1≤1mm, in the case of taking into account the performance of blocking the impact of the exhaust emitted by the battery monomer 20 on the pipeline body 610 and the performance of thermal isolation of the pipeline body 610 of the integrated structure 70, the thickness of the integrated structure 70 can also be adjusted to reduce the internal space of the pipeline body 610 in the first containing cavity 50, improve the energy density of the battery monomer 20, thereby improving the use performance of the battery device 10, and saving the assembly process.

[0123] It should be understood that, as shown in FIGS. 10 and 11, in the case of setting the first protective layer 710 on the outer surface 620 of the pipeline body 610 and setting the second protective layer 720 on the inner surface 630 of the pipeline body 610, the inner diameter of the first protective layer 710 in the embodiment of the present application can be represented by r4, the outer diameter of the first protective layer 710 can be represented by R4, the inner diameter of the second protective layer 720 can be represented by r5, the outer diameter of the second protective layer 720 can be represented by R5, the inner diameter of the pipeline body 610 can be represented by r6, and the outer diameter of the pipeline body 610 can be represented by R6.

[0124] In some implementations, as shown in FIGS. 10 and 11, the first protective layer 710 is arranged on the outer surface 620 of the pipeline body 610, and the second protective layer 720 is arranged on the inner surface 630 of the pipeline body 610, wherein, in a plane perpendicular to the extension direction of the pipeline body 610, the inner diameter r4 of the first protective layer 710 and the outer diameter R6 of the pipeline body 610 satisfy: r4-R6≥1 mm, and the outer diameter R5 of the second protective layer 720 and the inner diameter r6 of the pipeline body 610 satisfy: 0mm≤r6-R5≤1 mm.

[0125] For example, the difference r4-R6 between the inner diameter r4 of the first protective layer 710 and the outer diameter R6 of the pipeline body 610 can be set to 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc., or a value within a range obtained by any two of the above combinations.

[0126] For example, the difference r6-R5 between the outer diameter R5 of the second protective layer 720 and the inner diameter r6 of the pipeline body 610 can be set to 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc., or a value within a range obtained by any two of the above combinations. It should be understood that when the difference r6-R5 between the outer diameter R5 of the second protective layer 720 and the inner diameter r6 of the pipeline body 610 is equal to 0 mm, the second protective layer 720 is fixedly connected with the inner surface 630 of the pipeline body 610.

[0127] In the embodiments of the present application, the first protective layer 710 is arranged on the outer surface 620 of the pipeline body 610, and the second protective layer 720 is arranged on the inner surface 630 of the pipeline body 610, in a plane perpendicular to the extension direction of the pipeline body 610, by setting the inner diameter r4 of the first protective layer 710 and the outer diameter R6 of the pipeline body 610 to satisfy: r4-R6≥1 mm, and setting the outer diameter R5 of the second protective layer 720 and the inner diameter r6 of the pipeline body 610 to satisfy: 0mm≤r6-R5≤1 mm, so as to facilitate the assembly between the first protective layer 710, the second protective layer 720 and the pipeline body 610, and improve the use performance of the heat exchange device 60.

[0128] In some implementations, as shown in FIG. 10, the first protective layer 710 is arranged on the outer surface of the corrugated pipe 640, and the second protective layer 720 is arranged on the inner surface of the corrugated pipe 640, wherein along the extension direction of the pipe body 610, the length L4 of the first protective layer 710 and the length L6 of the corrugated pipe 640 satisfy: L4-L6≥5mm, and the length L5 of the second protective layer 720 and the length L6 of the corrugated pipe 640 satisfy: L5-L6≥5mm.

[0129] Exemplarily, the difference L4-L6 between the length L4 of the first protective layer 710 and the length L6 of the corrugated pipe 640 can be set to 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., or a value within the range obtained by any two of the above combinations. The difference L5-L6 between the length L5 of the second protective layer 720 and the length L6 of the corrugated pipe 640 can be set to 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., or a value within the range obtained by any two of the above combinations.

[0130] In the embodiments of the present application, the first protective layer 710 is arranged on the outer surface of the corrugated pipe 640, and the second protective layer 720 is arranged on the inner surface of the corrugated pipe 640, along the extension direction of the pipe body 610, by setting the length L4 of the first protective layer 710 and the length L6 of the corrugated pipe 640 to satisfy: L4-L6≥5mm, and the length L5 of the second protective layer 720 and the length L6 of the corrugated pipe 640 to satisfy: L5-L6≥5mm, so as to take into account the protective performance of the corrugated pipe 640 and the assembly tolerance between the first protective layer 710, the second protective layer 720 and the corrugated pipe 640, and improve the use performance of the heat exchange device 60.

[0131] In some implementations, the second protective layer 720 is heat-fused or adhesively connected to the inner surface 630 of the pipe body 610.

[0132] It should be understood that in the case where the second protective layer 720 is heat-fused or adhesively connected to the inner surface 630 of the pipe body 610, the difference r6-R5 between the outer diameter R5 of the second protective layer 720 and the inner diameter r6 of the pipe body 610 in a plane perpendicular to the extension direction of the pipe body 610 can be 0mm.

[0133] In the embodiments of the present application, the second protective layer 720 is connected to the inner surface 630 of the pipeline body 610 by heat melting or bonding, so as to balance the use performance of the pipeline body 610 and the bonding strength between the second protective layer 720 and the inner surface 630 of the pipeline body 610, and the connection method is simple and convenient for processing and manufacturing.

[0134] In some implementations, the heat-resistant temperature of the material of the first protective layer 710 is greater than or equal to 500°C, and / or the heat-resistant temperature of the material of the second protective layer 720 is greater than or equal to 500°C.

[0135] It should be understood that the heat-resistant temperature of the material in the embodiments of the present application refers to the maximum temperature that the material can withstand, and the material will not change in physical or chemical properties or be damaged below the heat-resistant temperature.

[0136] In testing the material of the first protective layer 710, part of the material of the first protective layer 710 can be obtained, for example, a certain area of the first protective layer 710 is cut, a flame spray gun is used to control the temperature of the outer surface of the first protective layer 710 to be greater than or equal to 800°C for 20s, and it is detected whether the surface of the first protective layer 710 is perforated, if not, the material of the first protective layer 710 meets the use requirement. Alternatively, in testing the material of the second protective layer 720, part of the material of the second protective layer 720 can be obtained, for example, a certain area of the second protective layer 720 is cut, a flame spray gun is used to control the temperature of the outer surface of the second protective layer 720 to be greater than or equal to 800°C for 20s, and it is detected whether the surface of the second protective layer 720 is perforated, if not, the material of the second protective layer 720 meets the use requirement.

[0137] It should also be understood that since the first protective layer 710 is used to block the impact of the exhaust emitted by the battery monomer 20 on the pipeline body 610, the temperature of the first protective layer 710 itself will continue to increase during the protection of the pipeline body 610. By setting the second protective layer 720 with a suitable heat-resistant temperature to thermally isolate at least part of the pipeline body 610, the risk of surface ablation of the pipeline body 610 due to high temperature environment inside the battery device 10 or melting of the pipeline body 610 leading to liquid leakage is reduced, and the use performance of the heat exchange device 60 is improved.

[0138] In the embodiment of the present application, by setting the heat-resistant temperature of the material of the first protective layer to be greater than or equal to 500°C, and / or setting the heat-resistant temperature of the material of the second protective layer 720 to be greater than or equal to 500°C, the heat insulation performance of the second protective layer 720 and the heat influence of the first protective layer 710 on the second protective layer 720 are taken into account, the risk of ablation or melting of the first protective layer 710 on the second protective layer 720 during heating is reduced, the pipeline body 610 is effectively protected, and the use performance of the heat exchange device 60 is improved.

[0139] In some implementations, the material of the second protective layer 720 includes at least one of the following materials: glass fiber, mica sheet, aerogel, pre-oxidized fiber.

[0140] In the embodiment of the present application, by setting the material of the second protective layer 720 to include at least one of the following materials: glass fiber, mica sheet, aerogel, pre-oxidized fiber, the heat insulation performance of the second protective layer 720 is effectively improved, the pipeline body 610 is heat insulated, and the use performance of the heat exchange device 60 is improved.

[0141] In some implementations, the material of the first protective layer 710 includes a phase change material or a ceramicized composite tape.

[0142] It should be understood that the phase change material in the embodiment of the present application refers to a material that stores and releases heat through phase changes such as melting, solidification, evaporation, condensation, etc. at a specific temperature. These materials can absorb or release a large amount of heat energy when the temperature changes, and are widely used in temperature regulation, heat management and energy storage applications. Specifically, each phase change material has a specific phase change temperature at which the material undergoes a phase change, thereby storing or releasing heat. During the phase change process, the material can absorb or release a large amount of heat energy, although the temperature change is small, but the energy transfer efficiency is high. The phase change material can undergo the phase change process multiple times without significant performance degradation. The ceramicized composite tape in the embodiment of the present application can be a composite formed by coating and stretching a ceramic fireproof and refractory silicone rubber and a high-temperature resistant glass fiber cloth as a base material.

[0143] In the embodiment of the present application, by setting the material of the first protective layer 710 to include a phase change material or a ceramicized composite tape, in the case of thermal runaway of the battery monomer 20, the performance of the first protective layer 710 in resisting or blocking the high-temperature or high-pressure gas discharged by the battery monomer 20 is effectively improved, the pipeline body 610 is effectively protected, and the use performance of the heat exchange device 60 is improved.

[0144] In some implementations, as shown in FIG. 5, the heat exchange device 60 further includes a heat exchange plate 750 and two pipe bodies 610, the surface of the box 11 is provided with a liquid inlet 730 and a liquid outlet 740 which are in communication with the outside, one end of a first pipe body 611 of the two pipe bodies 610 is in communication with the liquid inlet 730, the other end of the first pipe body 611 is in communication with the heat exchange plate 750, one end of a second pipe body 612 of the two pipe bodies 610 is in communication with the liquid outlet 740, and the other end of the second pipe body 612 is in communication with the heat exchange plate 750.

[0145] It should be understood that the external device located outside the box 11 in the embodiments of the present application can realize heat exchange with the battery monomer 20 inside the battery device 10 through the liquid inlet 730 and the liquid outlet 740 provided on the box 11, and the heat exchange medium generated by the external device can flow into the pipe body 610 through the liquid inlet 730 and take away the heat generated by the battery device 10 through heat conduction, and the heat exchange medium flows out of the liquid outlet 740 to the external device, that is, a circulation loop for the flow of the heat exchange medium is formed between the external device and the pipe body 610 to continuously regulate the temperature of the battery device 10. It should also be understood that the external device can include a heat exchanger for cooling the heat exchange medium flowing out of the liquid outlet 740, and a pump for re-feeding the cooled heat exchange medium into the pipe body 610 through the liquid inlet 730 to continuously regulate the temperature of the battery device 10.

[0146] In the embodiments of the present application, by setting the heat exchange device 60 to further include a heat exchange plate 750 and two pipe bodies 610, and the surface of the box 11 is provided with a liquid inlet 730 and a liquid outlet 740 which are in communication with the outside, one end of a first pipe body 611 of the two pipe bodies 610 is in communication with the liquid inlet 730, the other end of the first pipe body 611 is in communication with the heat exchange plate 750, one end of a second pipe body 612 of the two pipe bodies 610 is in communication with the liquid outlet 740, and the other end of the second pipe body 612 is in communication with the heat exchange plate 750, that is, the heat exchange medium provided by the external device can circulate between the heat exchange device 60 and the outside of the box 11 through the liquid inlet 730 and the liquid outlet 740, so as to exchange heat with the battery monomer 20, reduce the risk of thermal runaway of the battery monomer 20, and improve the use performance of the battery device 10.

[0147] According to some embodiments of the present application, the embodiments of the present application further provide a power consumption device, which includes the battery device 10 in any of the above embodiments, and the battery device 10 is used to provide power for the power consumption device. Specifically, the power consumption device can be the vehicle 1 shown in the above FIG. 1, or any power consumption device using the battery device 10.

[0148] The electric device can be a device or system of any of the application battery apparatuses 10 described above.

[0149] According to some embodiments of the present application, referring to FIGS. 5-11, the present application provides a battery apparatus 10, comprising: a box body 11 having a first accommodating cavity 50; a battery cell 20 accommodated in the first accommodating cavity 50; and a heat exchange device 60 accommodated in the first accommodating cavity 50 and arranged close to the battery cell 20, the heat exchange device 60 being configured to exchange heat with the battery cell 20; the heat exchange device 60 comprises a pipe body 610 accommodating a heat exchange medium, and a first protective layer 710 arranged on an outer surface 620 of the pipe body 610, the first protective layer 710 being configured to block the impact of exhaust emitted by the battery cell 20 on the pipe body 610, the heat exchange device 60 further comprises a second protective layer 720 arranged between the outer surface 620 of the pipe body 610 and the first protective layer 710, and / or the second protective layer 720 is arranged on an inner surface 630 of the pipe body 610, the second protective layer 720 being configured to thermally insulate the pipe body 610. At least part of the pipe of the pipe body 610 comprises a corrugated pipe 640, and the second protective layer 720 covers the corrugated pipe 640. The second protective layer 720 is arranged between the outer surface 620 of the pipe body 610 and the first protective layer 710, wherein, in a plane perpendicular to the extension direction of the pipe body 610, the inner diameter r1 of the first protective layer 710 and the outer diameter R2 of the second protective layer 720 satisfy: r1-R2≥1mm, and the inner diameter r2 of the second protective layer 720 and the outer diameter R3 of the pipe body 610 satisfy: r2-R3≥1mm. In the extension direction of the pipe body 610, the length L1 of the first protective layer 710 and the length L2 of the second protective layer 720 satisfy: L1≥L2, and the length L2 of the second protective layer 720 and the length L3 of the corrugated pipe 640 satisfy: L2-L3≥5mm.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box body having a first accommodating cavity; a battery cell accommodated in the first accommodating cavity; a heat exchange device accommodated in the first accommodating cavity and arranged close to the battery cell, the heat exchange device being used for heat exchange with the battery cell; the heat exchange device comprises a pipeline body accommodating a heat exchange medium and a first protective layer arranged on the outer surface of the pipeline body, the first protective layer being used for blocking the impact of exhaust emissions of the battery cell on the pipeline body, the heat exchange device further comprises a second protective layer arranged between the outer surface of the pipeline body and the first protective layer, and / or the second protective layer is arranged on the inner surface of the pipeline body, and the second protective layer is used for heat insulation of the pipeline body.

2. The battery device according to claim 1, characterized by At least part of the pipeline of the pipeline body comprises a corrugated pipeline, and the second protective layer covers the corrugated pipeline.

3. The battery device of claim 2, wherein The second protective layer is arranged between the outer surface of the pipeline body and the first protective layer, wherein, in a plane perpendicular to the extension direction of the pipeline body, the inner diameter r1 of the first protective layer and the outer diameter R2 of the second protective layer satisfy r1-R2>=1mm, and the inner diameter r2 of the second protective layer and the outer diameter R3 of the pipeline body satisfy r2-R3>=1mm.

4. The battery device according to claim 2 or 3, characterized by The second protective layer is arranged between the outer surface of the corrugated pipeline and the first protective layer, wherein, along the extension direction of the pipeline body, the length L1 of the first protective layer and the length L2 of the second protective layer satisfy L1>=L2, and the length L2 of the second protective layer and the length L3 of the corrugated pipeline satisfy L2-L3>=5mm.

5. The battery device according to claim 3 or 4, characterized by The first protective layer and the second protective layer are in an integrated structure.

6. The battery device of claim 5, wherein The maximum thickness D1 of the integrated structure satisfies 0mm 7. The battery device of claim 2, wherein The first protective layer is arranged on the outer surface of the pipeline body, and the second protective layer is arranged on the inner surface of the corrugated pipeline, wherein, in a plane perpendicular to the extension direction of the pipeline body, the inner diameter r4 of the first protective layer and the outer diameter R6 of the pipeline body satisfy r4-R6>=1mm, and the outer diameter R5 of the second protective layer and the inner diameter r6 of the pipeline body satisfy 0mm<=r6-R5<=1mm.

8. The battery device according to claim 2 or 7, characterized by The first protective layer is arranged on the outer surface of the corrugated pipeline, and the second protective layer is arranged on the inner surface of the corrugated pipeline, wherein, along the extension direction of the pipeline body, the length L4 of the first protective layer and the length L6 of the corrugated pipeline satisfy L4-L6>=5mm, and the length L5 of the second protective layer and the length L6 of the corrugated pipeline satisfy L5-L6>=5mm.

9. The battery device according to claim 7 or 8, characterized by The second protective layer is heat fusion connected or adhesively connected with the inner surface of the pipeline body.

10. The battery device according to any one of claims 1 to 9, characterized by, The heat-resistant temperature of the material of the first protective layer is greater than or equal to 500 DEG C, and / or, The heat-resistant temperature of the material of the second protective layer is greater than or equal to 500 DEG C.

11. The battery device according to any one of claims 1 to 10, characterized by, The material of the second protective layer comprises at least one of the following materials: glass fiber, mica sheet, aerogel and pre-oxidized wire.

12. The battery device according to any one of claims 1 to 11, characterized by, The material of the first protective layer comprises a phase change material or a ceramic composite tape.

13. The battery device according to any one of claims 1 to 12, characterized by, The heat exchange device further comprises a heat exchange plate and two pipe bodies, a surface of the box body is provided with a liquid inlet and a liquid outlet which are in communication with the outside, one end of a first pipe body of the two pipe bodies is in communication with the liquid inlet, the other end of the first pipe body is in communication with the heat exchange plate, one end of a second pipe body of the two pipe bodies is in communication with the liquid outlet, and the other end of the second pipe body is in communication with the heat exchange plate.

14. An electrical device, characterized by Comprising: The battery device as claimed in any one of claims 1 to 13, the battery device being used to provide electric energy for the electric equipment.

Images