CN121663018A

CN121663018A - Battery device and electric equipment

Info

Publication number: CN121663018A
Application number: CN202411272927.0A
Authority: CN
Inventors: 吴少基; 徐葵; 王世涵
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-09-11
Filing date: 2024-09-11
Publication date: 2026-03-13
Also published as: WO2026056464A1

Abstract

This application provides a battery device and an electrical appliance that can improve the performance of the battery device. The battery device includes: a housing, individual battery cells, and a heat exchange device. The housing has a first receiving cavity in which the individual battery cells are housed. The heat exchange device is housed in the first receiving cavity and disposed close to the individual battery cells. The heat exchange device is used for heat exchange with the individual battery cells. The heat exchange device includes a pipeline body containing a heat exchange medium and a first protective layer disposed on the outer surface of the pipeline body. The first protective layer is used to prevent the impact of emissions from the individual battery cells on the pipeline body. The heat exchange device also includes a second protective layer disposed between the outer surface of the pipeline body and the first protective layer, and/or, the second protective layer is disposed on the inner surface of the pipeline body, and the second protective layer is used for thermal insulation of the pipeline body.

Description

Battery device and electric equipment

Technical Field

The application relates to the field of batteries, in particular to a battery device and electric equipment.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In addition to improving the electrical performance of battery devices, safety issues are also a non-negligible issue in the development of battery technology, such as thermal runaway issues of battery devices. If the safety problem of the battery device cannot be guaranteed, the battery device cannot be used, and the service performance of the battery device is reduced. Therefore, how to reduce the influence of thermal runaway diffusion of the battery cells on the battery device and improve the service performance of the battery device has become a technical problem to be solved in the art.

Disclosure of Invention

The embodiment of the application provides a battery device and electric equipment, which can improve the service performance of the battery device.

In a first aspect, the application provides a battery device, which comprises a box body, a battery unit, a heat exchange device and a second protection layer, wherein the box body is provided with a first accommodating cavity, the battery unit 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 unit and used for exchanging heat with the battery unit, the heat exchange device comprises a pipeline body for accommodating a heat exchange medium and a first protection layer arranged on the outer surface of the pipeline body, the first protection layer is used for blocking impact of discharged emissions of the battery unit on the pipeline body, the second protection layer is arranged between the outer surface of the pipeline body and the first protection layer, and/or the second protection layer is arranged on the inner surface of the pipeline body and used for thermally isolating the pipeline body.

In the embodiment of the application, the heat exchange device in the battery device is provided with the pipeline body containing 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 discharged matters discharged by the battery unit on the pipeline body, the heat exchange device is also provided with 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 thermally isolating the pipeline body, and under the condition that the battery unit is out of control, the high-temperature or high-pressure gas discharged by the battery unit can be effectively blocked by the first protective layer, and meanwhile, the second protective layer can thermally isolate the pipeline body, so that the risk of liquid leakage caused by ablation or melting through the pipeline body on the surface of the pipeline body due to the high-temperature environment in the battery device is reduced, and the service performance of the battery device is improved.

In some embodiments, at least a portion of the tubing body comprises a corrugated tubing, and the second protective layer covers the corrugated tubing. Thus, in the embodiment of the application, at least part of the pipeline body is arranged to comprise the corrugated pipeline so as to facilitate the assembly of the pipeline body, meanwhile, as the corrugated pipeline is easy to break or melt through at high temperature, the second protective layer is arranged to cover the corrugated pipeline, and under the condition that a battery monomer is out of control, the second protective layer can thermally isolate the corrugated pipeline so as to reduce the risk of liquid leakage caused by ablation or melting through the surface of the corrugated pipeline due to the high-temperature environment inside the battery device, and improve the service performance of the heat exchange device, thereby improving the service performance of the battery device.

In some embodiments, the second protective layer is disposed between the outer surface of the pipe body and the first protective layer, wherein, on a plane perpendicular to the extending direction of the pipe body, an inner diameter R1 of the first protective layer and an outer diameter R2 of the second protective layer satisfy that R1-R2 is not less than 1mm, and an inner diameter R2 of the second protective layer and an outer diameter R3 of the pipe body satisfy that R2-R3 is not less than 1mm.

In the embodiment of the application, the second protective layer is arranged between the outer surface of the pipeline body and the first protective layer, and on a plane perpendicular to the extending 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 set to be more than or equal to 1mm, and the inner diameter R2 of the second protective layer and the outer diameter R3 of the pipeline body are set to be more than or equal to 1mm, so that the assembly among the first protective layer, the second protective layer and the pipeline body is facilitated, and the service performance of the heat exchange device is improved.

In some embodiments, the second protection layer is disposed between the outer surface of the corrugated pipe and the first protection layer, wherein, along the extending direction of the pipe body, the length L1 of the first protection layer and the length L2 of the second protection layer satisfy that L1 is greater than or equal to L2, and the length L2 of the second protection layer and the length L3 of the corrugated pipe satisfy that L2-L3 is greater than or equal to 5mm.

In the embodiment of the application, the second protective layer is arranged between the outer surface of the corrugated pipeline and the first protective layer, and the service performance of the heat exchange device is improved by setting the length L1 of the first protective layer and the length L2 of the second protective layer to be equal to or more than L2 and setting the length L2 of the second protective layer and the length L3 of the corrugated pipeline to be equal to or more than L2-L3 to be equal to or more than 5mm along the extending direction of the pipeline body so as to consider the protective performance of the corrugated pipeline and the assembly tolerance among the first protective layer, the second protective layer and the corrugated pipeline.

In some embodiments, the first protective layer and the second protective layer are of unitary construction. In this way, in the embodiment of the application, the first protection layer and the second protection layer are arranged into an integrated structure so as to give consideration to the impact resistance of the protection layer to the pipeline body caused by the discharged emission of the battery unit and the thermal insulation performance of the pipeline body, so that the space occupied by the protection layer in the first accommodating cavity can be reduced, the energy density of the battery unit is improved, the service performance of the battery device is improved, and meanwhile, the assembly flow is saved.

In some embodiments, the maximum thickness D1 of the unitary structure satisfies 0mm < D1 +.1 mm. Thus, in the embodiment of the application, the first protective layer and the second protective layer are arranged into the integrated structure, and the thickness D1 of the integrated structure is set to be 0mm < D1 < 1mm, so that under the condition that the impact performance of the integrated structure for blocking the discharged emission of the battery unit on the pipeline body and the thermal insulation performance of the pipeline body are both considered, the maximum thickness of the integrated structure can be adjusted to reduce the internal space of the pipeline body occupying the first accommodating cavity, and the energy density of the battery unit is improved, thereby improving the service performance of the battery device and saving the assembly flow.

In some embodiments, the first protective layer is disposed on the outer surface of the pipeline body, and the second protective layer is disposed on the inner surface of the pipeline body, wherein, on a plane perpendicular to the extending direction of the pipeline body, an inner diameter R4 of the first protective layer and an outer diameter R6 of the pipeline body satisfy R4-R6 being equal to or greater than 1mm, and an outer diameter R5 of the second protective layer and an inner diameter R6 of the pipeline body satisfy R6-R5 being equal to or greater than 0mm and equal to or less than 1mm.

In the embodiment of the application, the first protective layer is arranged on the outer surface of the pipeline body, the second protective layer is arranged on the inner surface of the corrugated pipeline, and the inner diameter R4 of the first protective layer and the outer diameter R6 of the pipeline body are set to be more than or equal to 1mm, and the outer diameter R5 of the second protective layer and the inner diameter R6 of the pipeline body are set to be more than or equal to 0mm and less than or equal to 6-R5 and less than or equal to 1mm on the plane perpendicular to the extending direction of the pipeline body, so that the assembly among the first protective layer, the second protective layer and the pipeline body is facilitated, and the service performance of the heat exchange device is improved.

In some embodiments, the first protection layer is disposed on an outer surface of the corrugated pipe, and the second protection layer is disposed on an inner surface of the corrugated pipe, wherein, along an extending direction of the pipe body, a length L4 of the first protection layer and a length L6 of the corrugated pipe satisfy that L4-L6 is greater than or equal to 5mm, and a length L5 of the second protection layer and a length L6 of the corrugated pipe satisfy that L5-L6 is greater than or equal to 5mm.

In the embodiment of the application, the first protective layer is arranged on the outer surface of the corrugated pipeline, the second protective layer is arranged on the inner surface of the corrugated pipeline, and the service performance of the heat exchange device is improved by enabling the length L4 of the first protective layer and the length L6 of the corrugated pipeline to be more than or equal to 5mm, and the length L5 of the second protective layer and the length L6 of the corrugated pipeline to be more than or equal to 5mm along the extending direction of the pipeline body and considering the protective performance of the corrugated pipeline and the assembly tolerance among the first protective layer, the second protective layer and the corrugated pipeline.

In some embodiments, the second protective layer is thermally fused or adhesively bonded to the inner surface of the pipe body. Therefore, in the embodiment of the application, the second protective layer is connected with the inner surface of the pipeline body in a hot melting way or in a bonding way, so that the service performance of the pipeline body and the bonding strength between the second protective layer and the second surface are both considered, and meanwhile, the connection mode is simple and convenient to process and manufacture.

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 ℃. Thus, in the embodiment of the 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 consider 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 that the first protective layer ablates or melts through the second protective layer in the heating process, and effectively protect the pipeline body, thereby improving the service performance of the heat exchange device.

In some embodiments, the material of the second protective layer comprises at least one of fiberglass, mica flakes, aerogel, pre-oxidized fibers. In this way, in the embodiment of the application, the material of the second protective layer is set to comprise at least one of glass fiber, mica sheet, aerogel and pre-oxidized fiber, so that the thermal isolation performance of the second protective layer is effectively improved, the pipeline body is thermally isolated, and the service performance of the heat exchange device is improved.

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 embodiment of the application, the material of the first protective layer is set to comprise the phase change material or the ceramic composite belt so as to effectively improve the anti-impact or blocking performance of high-temperature or high-pressure gas discharged by the battery cell under the condition that the battery cell is out of control, thereby effectively protecting the pipeline body and improving the service performance of the heat exchange device.

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 which are communicated with the outside, one end of a first pipeline body in the two pipeline bodies is communicated with the liquid inlet, the other end of the first pipeline body is communicated with the heat exchange plate, one end of a second pipeline body in the two pipeline bodies is communicated with the liquid outlet, and the other end of the second pipeline body is communicated with the heat exchange plate.

In the embodiment of the application, the heat exchange device is arranged to further comprise a heat exchange plate and two pipeline bodies, the surface of the box body is provided with a liquid inlet and a liquid outlet which are communicated with the outside, one end of a first pipeline body in the two pipeline bodies is communicated with the liquid inlet, the other end of the first pipeline body is communicated with the heat exchange plate, one end of a second pipeline body in the two pipeline bodies is communicated with the liquid outlet, the other end of the second pipeline body is communicated with the heat exchange plate, namely, a heat exchange medium provided by an external device can circulate between the heat exchange device and the outside of the box body through the liquid inlet and the liquid outlet, so that heat exchange with a battery monomer is facilitated, the risk of thermal runaway of the battery monomer is reduced, and the service performance of the battery device is improved.

In a second aspect, there is provided a powered device comprising a battery arrangement as described in the first aspect for providing electrical energy to the powered device.

In some implementations, the powered device may be a vehicle, a vessel, a spacecraft, or the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present application.

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

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

Fig. 4 is an exploded view of a battery cell according to another embodiment of the present application.

Fig. 5 is a schematic structural view of a battery device according to another embodiment of the present application.

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

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

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

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

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

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

The reference numerals illustrate 1-vehicle, 10-battery device, 20-battery cell, 30-controller, 40-motor, 11-case, 111-first part, 112-second part, 112 a-bottom plate, 112 b-side plate, 21-case, 22-electrode assembly, 211-case, 212-end cap, 213-pressure release mechanism, 222-tab, 222 a-positive tab, 222 b-negative tab, 214-electrode terminal, 214 a-positive electrode terminal, 214 b-negative electrode terminal, 23-connection member, 24-insulator, 50-first accommodation chamber, 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-integral structure, 730-liquid inlet, 740-liquid outlet, 750-heat exchange plate.

In the drawings, the drawings are not drawn to scale.

Detailed Description

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

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, the terms used in the description of this application in this application are for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of this application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly connected, indirectly connected through an intermediary, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate that a exists alone, while a and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

All embodiments of the application and alternative embodiments may be combined with each other to form new solutions, unless otherwise specified.

All technical features and optional technical features of the application may be combined with each other to form new technical solutions, unless specified otherwise.

As an example, the pressure relief mechanism may be integrally formed with the housing.

As an example, the pressure relief mechanism may also be provided separately from and connected to the housing.

In some embodiments, when the housing is in a non-sealing structure, the pressure release mechanism may be provided as a through hole for exhausting gas inside the battery cell.

The emissions discharged from the battery cells referred to in the present application include, but are not limited to, electrolytes, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

The battery device according to embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells connected in series, parallel, or series-parallel by a bus member.

In some embodiments, the battery cell assembly is generally formed from a plurality of battery cells arranged.

As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by binding a plurality of battery cells by a tie.

In some embodiments, the battery device may be a battery pack including a case and one or more battery cell assemblies housed in the case.

As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the case in such a manner that the battery module is fixed in the case.

As an example, the battery cell assembly may be accommodated in the case by directly fixing a plurality of battery cells to the case.

As an example, the case may include a first case and a second case. The first box body and the second box body are buckled, so that a closed space is formed inside the box body to accommodate the battery cell assembly. The closing means covering or closing, and can be sealing or unsealing. The first housing may be a top cover or a bottom plate.

As an example, the case may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

The technical scheme described by the embodiment of the application is suitable for various electric equipment using battery monomers, such as mobile phones, portable equipment, notebook computers, battery cars, electric toys, electric tools, vehicles, ships, spacecraft and the like, and for example, the spacecraft comprises planes, rockets, spaceships, spacecraft and the like.

Currently, battery device technology is developed while considering various design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters. In addition to improving the electrical performance of battery devices, safety issues are also a non-negligible issue in the development of battery device technology. Such as thermal runaway problems of the battery device. If the safety problem of the battery device cannot be guaranteed, the battery device cannot be used, and the service performance of the battery device is reduced. Therefore, how to reduce the risk of thermal runaway diffusion of the battery cells to the battery device and improve the service performance of the battery device has become a technical problem to be solved in the art. Specifically, a pipe body close to a battery unit is generally disposed on an inner wall of a box of the battery device, and a gas protection layer, such as a glass fiber sleeve, is disposed on an outer periphery of the pipe body so as to prevent high-temperature and high-pressure gas discharged from the battery unit from thermally losing control to the pipe body.

Therefore, the embodiment of the application provides a battery device and electric equipment, the battery device comprises a box body, a battery monomer and a heat exchange device, the box body is provided with a first accommodating cavity, the battery monomer 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 monomer, the heat exchange device is used for carrying out heat exchange with the battery monomer, the heat exchange device comprises a pipeline body for accommodating heat exchange medium and a first protective layer arranged on the outer surface of the pipeline body, the first protective layer is used for blocking the impact of discharged emission of the battery monomer 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 the inner surface of the pipeline body and is used for carrying out heat isolation on the pipeline body. Thus, in the embodiment of the application, by arranging the pipeline body containing the heat exchange medium and the first protective layer arranged on the outer surface of the pipeline body in the heat exchange device in the battery device, the first protective layer is used for blocking the impact of the discharged matters discharged by the battery unit on the pipeline body, the heat exchange device is also provided with 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 thermally isolating the pipeline body, and in the case of thermal runaway of the battery unit, the high-temperature or high-pressure gas discharged by the battery unit can be effectively blocked by the first protective layer, and meanwhile, the second protective layer can thermally isolate the pipeline body, so that the risk of liquid leakage caused by ablation or melting through the pipeline body on the surface of the pipeline body due to the high-temperature environment inside the battery device is reduced, and the service performance of the heat exchange device is improved, and the service performance of the battery device is improved.

The technical scheme described by the embodiment of the application is suitable for various electric equipment using a battery device.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc., the spacecraft includes an airplane, a rocket, a space plane, a spacecraft, etc., the electric toy includes a fixed or movable electric toy such as a game machine, an electric vehicle toy, an electric ship toy, an electric plane toy, etc., and the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, etc. The embodiment of the application does not limit the electric equipment in particular.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described electric devices, but may be applied to all devices using batteries, and the following embodiments are described in detail by taking electric devices as an example of a vehicle for brevity.

For example, as shown in fig. 1, a schematic structural diagram of a vehicle 1 according to an embodiment of the present application is shown, where the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The motor 40, the controller 30 and the battery device 10 may be provided in the vehicle 1, and the controller 30 is configured to control the battery device 10 to supply power to the motor 40. For example, the battery device 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery device 10 may be used for power supply of the vehicle 1, for example, the battery device 10 may be used as an operating power source of the vehicle 1, for the circuitry of the vehicle 1, for example, for the start-up, navigation and operational power requirements of the vehicle 1. In another embodiment of the present application, the battery device 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to supply driving power to the vehicle 1.

To meet different power requirements, the battery device 10 according to the embodiment of the present application may include at least one battery cell assembly, where the battery cell assembly includes a plurality of battery cells, and the plurality of battery cells may be electrically connected in series or parallel or in series-parallel to form the battery device 10, where series-parallel refers to a mixture of series and parallel. The battery device 10 may also be referred to as a battery pack. For example, a plurality of battery cells may be first assembled into a battery module by series connection or parallel connection or series-parallel connection, and then assembled into the battery device 10 by series connection or parallel connection or series-parallel connection. That is, a plurality of battery cells may be directly assembled into the battery device 10, or the battery module may be assembled first and then assembled into the battery device 10.

For example, as shown in fig. 2, the battery device 10 may include a plurality of battery cells 20, which is a schematic structural view of the battery device 10 according to an embodiment of the present application. The battery device 10 may further include a case 11 (or called a cover), in which the case 11 has a hollow structure, and a plurality of battery cells 20 are accommodated in the case 11. For example, a plurality of battery cells 20 are connected in parallel or in series-parallel combination with each other and then placed in the case 11.

As shown in fig. 2, the housing 11 may include two portions, referred to herein as a first portion 111 and a second portion 112, respectively, with the first portion 111 and the second portion 112 snap-fit together. The shape of the first portion 111 and the second portion 112 may be determined according to the shape of the combination of the plurality of battery cells 20, and each of the first portion 111 and the second portion 112 may have one opening. For example, each of the first portion 111 and the second portion 112 may be a hollow rectangular parallelepiped and each has only one surface as an open surface, the opening of the first portion 111 and the opening of the second portion 112 are disposed opposite to each other, and the first portion 111 and the second portion 112 are fastened to each other to form the case 11 having a closed chamber. Wherein the second portion 112 may include a bottom panel 112a, side panels 112b, and beams. The plurality of battery cells 20 are connected in parallel or in series-parallel combination and then placed in the box 11 formed by buckling the first part 111 and the second part 112.

Alternatively, the battery device 10 may further include other structures, which are not described in detail herein. For example, the battery device 10 may further include a bus member for making electrical connection between the plurality of battery cells 20, such as parallel or series-parallel connection. Specifically, the bus member may realize electrical connection between the battery cells 20 by connecting electrode terminals of the battery cells 20. Further, the bus member may be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the plurality of battery cells 20 may be further drawn through the housing by a conductive mechanism. Alternatively, the conductive means may also belong to the bus bar member.

Fig. 3 is a schematic structural diagram of a battery cell 20 according to an embodiment of the application, and fig. 4 is a schematic exploded structural diagram of the battery cell 20 according to another embodiment of the application. As shown in fig. 3 and 4, the battery cell 20 of the embodiment of the present application may include a case 21 having a closed receiving space and an electrode assembly 22 disposed in the receiving space within the case 21. The housing 21 may include a housing 211 and an end cap 212, wherein the housing 211 has a hollow structure with at least one opening, and the end cap 212 is used to be buckled with the housing 211 to form the housing 21 with a closed accommodating space.

It should be understood that the battery cell 20 in the embodiment of the present application may be a secondary battery, and the secondary battery refers to the battery cell 20 that can be continuously used by activating the active material in a charging manner after the battery cell 20 is discharged. Illustratively, the battery cell 20 may be a lithium 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 storage battery, or the like.

The electrode assembly 22 in the embodiment of the present application includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During charge and discharge of the battery cell 20, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the end cap 212 may be a plate-like structure for covering the opening of the housing 211. In other embodiments, the end cap 212 is similar in structure to the housing 211, i.e., the housing 211 and the end cap 212 are hollow structures having one opening that interfaces to form the housing 21 with a closed receiving space.

It should be understood that if the end cap 212 is a plate-shaped structure, the housing 211 may have a hollow structure with one or more ends open, for example, if the housing 211 has a hollow structure with one end open, the end cap 212 may be provided as one, and if the housing 211 has a hollow structure with two opposite ends open, the end caps 212 may be provided as two, and the two end caps 212 respectively cover the openings at the two ends of the housing 211.

The housing 21 may be of various shapes, such as a cylinder, a cuboid, or other polyhedron. As shown in fig. 3 and 4, in the embodiment of the present application, the case 21 is mainly described as an example of a rectangular parallelepiped structure.

It should be appreciated that the end cap 212 of the present embodiment is configured to cooperate with the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 may be adapted to the shape of the housing 211, and as shown in fig. 3 and 4, the housing 211 has a rectangular parallelepiped structure, and the end cap 212 has a rectangular plate-like structure adapted to the housing 211.

In some embodiments, the housing 211 may be a hollow structure having at least one end formed with an opening, and the end cap 212 may be shaped to fit the shape of the housing 211, and the end cap 212 is used to cover the opening of the housing 211, so that the case 21 insulates the internal environment of the battery cell 20 from the external environment. If the housing 211 has a hollow structure with one end formed to be open, the end cap 212 may be provided as one.

The material of the housing 211 according to the embodiment of the present application may include one or more materials, for example, copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 212 may also be one or more, and may include copper, iron, aluminum, steel, aluminum alloy, etc., for example. The material of the end cap 212 may be the same as or different from the material of the housing 211, and the material of the different walls of the housing 211 may be the same or different.

The end cap 212 of the embodiment of the present application may be any wall of the housing 21, for example, the end cap 212 may be a wall with the largest area, or a wall with the smallest area, or may be other walls, where the embodiment of the present application is not limited thereto. Alternatively, the end cap 212 may have other structures, for example, the end cap 212 may have a groove structure with an opening, so that the opening of the end cap 212 covers the opening of the housing 211, which is not limited thereto.

It should be appreciated that the battery cell 20 also includes an electrode terminal 214. The electrode terminal 214 of the embodiment of the present application is used to electrically connect with the electrode assembly 22 inside the battery cell 20 to output the electric power of the battery cell 20. As shown in fig. 3 to 4, the battery cell 20 may include at least two electrode terminals 214, and the at least two electrode terminals 214 may include at least one positive electrode terminal 214a and at least one negative electrode terminal 214b, the positive electrode terminal 214a being for electrical connection with the positive electrode tab 222a of the electrode assembly 22, and the negative electrode terminal 214b being for electrical connection with the negative electrode tab 222b of the electrode assembly 22. The positive electrode terminal 214a and the positive electrode tab 222a may be directly connected or indirectly connected, and the negative electrode terminal 214b and the negative electrode tab 222b may be directly connected or indirectly connected. Illustratively, the positive electrode terminal 214a may be electrically connected to the positive electrode tab 222a by one of the connection members 23, and the negative electrode terminal 214b may be electrically connected to the negative electrode tab 222b by one of the connection members 23. It should be understood that in the embodiment of the present application, the positive tab 222a and the negative tab 222b may be collectively referred to as the tabs 222.

In the embodiment of the present application, the wall of the case 211 and the wall of the end cap 212 are both referred to as the wall of the battery cell 20, wherein for the rectangular parallelepiped type battery cell 20 shown in fig. 3 and 4, the wall of the case 211 includes a bottom wall and four side walls. The case 211 is determined according to the shape of the combined one or more electrode assemblies 22, for example, the case 211 may be a hollow rectangular parallelepiped or square or cylindrical body, and one face of the case 211 has an opening so that one or more electrode assemblies 22 may be placed in the case 211. For example, when the housing 211 is a hollow rectangular parallelepiped or square, one of the planes of the housing 211 is an opening surface, i.e., the plane has no wall body so that the inside and outside of the housing 211 communicate. When the housing 211 may be a hollow cylinder, the end surface of the housing 211 is an open surface, i.e., the end surface has no wall body so that the inside and outside of the housing 211 communicate. End cap 212 covers the opening and is connected to housing 211 to form a closed cavity in which electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

In the battery cell 20, the electrode assembly 22 is a component of the battery cell 20 in which an electrochemical reaction occurs, and the electrode assembly 22 in the case 211 may be provided in one or more cases according to actual use requirements. For example, as shown in fig. 4, 2 electrode assemblies 22 are provided in the battery cell 20. The electrode assembly 22 may have a cylindrical shape, a rectangular parallelepiped shape, or the like, and if the electrode assembly 22 has a cylindrical structure, the case 211 may have a cylindrical structure, and if the electrode assembly 22 has a rectangular parallelepiped structure, the case 211 may have a rectangular parallelepiped structure.

In the battery cell 20, the electrode assembly 22 is a component of the battery cell 20 in which an electrochemical reaction occurs, and the electrode assembly 22 in the case 211 may be provided in one or more cases according to actual use requirements. For example, as shown in fig. 4, 2 electrode assemblies 22 are provided in the battery cell 20. The electrode assembly 22 may have a cylindrical shape, a rectangular parallelepiped shape, or the like, and if the electrode assembly 22 has a cylindrical structure, the case 211 may have a cylindrical structure, and if the electrode assembly 22 has a rectangular parallelepiped structure, the case 211 may have a rectangular parallelepiped structure. In an embodiment of the present application, the material of the housing 211 may include copper, iron, aluminum, steel, aluminum alloy, etc.

The pressure relief mechanism 213 provided on the battery cell 20 may be various possible pressure relief mechanisms 213. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured 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 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

In some implementations, an insulating member 24 may be further disposed in the battery cell 20, the insulating member 24 being disposed in an accommodating space of the case 211, and the insulating member 24 may be a hollow structure having one or more ends formed with an opening, and the accommodating space in the hollow structure is used to accommodate the electrode assembly 22 to improve the insulating performance of the battery cell 20.

Fig. 5 shows a schematic structural diagram of a battery device 10 according to another embodiment of the present application. Fig. 6 shows a schematic cross-sectional view of a heat exchange device 60 according to an embodiment of the application. Fig. 7 shows a schematic cross-sectional view of a heat exchange device 60 according to another embodiment of the present application. Fig. 8 shows a schematic cross-sectional view of a heat exchange device 60 according to another embodiment of the application. Fig. 9 shows a schematic cross-sectional view of a heat exchange device 60 according to another embodiment of the present application. Fig. 10 shows a schematic cross-sectional view of a heat exchange device 60 according to another embodiment of the present application. Fig. 11 shows a schematic cross-sectional view of a heat exchange device 60 according to another embodiment of the present application.

The schematic sectional views of the pipe body 610 in the heat exchange device 60 shown in fig. 6, 8 and 10 may be sectional views of different pipe bodies 610 to show the internal structure of the pipe body 610. The schematic sectional views of the pipe body 610 in the heat exchange device 60 shown in fig. 7, 9 and 11 may be schematic sectional views of different pipe bodies 610 in the extending direction perpendicular to the pipe body 610, respectively. It should also be appreciated that the tube body 610 in the heat exchange device 60 shown in fig. 6 and 7 may be a schematic cross-sectional view of the same tube body 610 in different directions. The pipe body 610 in the heat exchange device 60 shown in fig. 8 and 9 may be schematic cross-sectional views of the same pipe body 610 in different directions. The pipe body 610 in the heat exchange device 60 shown in fig. 10 and 11 may be schematic cross-sectional views of the same pipe body 610 in different directions.

In some implementations, as shown in fig. 5 to 11, the battery device 10 includes a case 11, a battery cell 20, and a heat exchanging device 60, the case 11 having a first receiving cavity 50, the battery cell 20 being received in the first receiving cavity 50, the heat exchanging device 60 being received in the first receiving cavity 50 and disposed adjacent to the battery cell 20, the heat exchanging device 60 being configured to exchange heat with the battery cell 20, the heat exchanging device 60 including a pipe body 610 receiving a heat exchanging medium and a first shielding 710 disposed at an outer surface 620 of the pipe body 610, the first shielding 710 being configured to block an impact of an exhaust discharged from the battery cell 20 on the pipe body 610, the heat exchanging device 60 further including a second shielding 720 disposed between the outer surface 620 of the pipe body 610 and the first shielding 710, and/or the second shielding 720 being disposed at an inner surface 630 of the pipe body 610, the second shielding 720 being configured to thermally isolate the pipe body 610.

It should be understood that the first receiving cavity 50 of the case 11 may be an open receiving cavity or a closed receiving cavity, for example, in the case that the first receiving cavity 50 is an open receiving cavity, an end of the first receiving cavity 50 may be provided with at least one opening for sealing connection with the case cover.

It should also be understood that the pressure relief mechanism 213 in the battery cell 20 of an embodiment of the present application refers to an element or component that actuates to relieve the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold may 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.

The term "actuated" as used herein refers to the pressure relief mechanism 213 being activated or activated to a state such that the internal pressure and temperature of the battery cell 20 is relieved. The action by pressure relief mechanism 213 may include, but is not limited to, at least a portion of pressure relief mechanism 213 breaking, crushing, tearing or opening, etc. During actuation, the pressure relief mechanism 213 will expel the high temperature, high pressure material inside the battery cell 20 as a discharge out of the actuated site. In this way, the pressure and temperature of the battery cells 20 can be relieved under controlled pressure or temperature conditions, thereby avoiding potentially more serious accidents.

The emissions discharged from the battery cell 20 as referred to in the embodiments of the present application include, but are not limited to, electrolyte, dissolved or split positive and negative electrode sheets, fragments of the insulating member 24, high-temperature and high-pressure gas generated by the reaction, flame, and the like.

It should be further understood that the first protection layer 710 is disposed on the outer surface 620 of the pipe body 610, which may mean that the first protection layer 710 may be wrapped around at least a portion of the outer surface of the pipe body 610, and the first protection layer 710 may not be fixedly connected to the outer surface 620, i.e. a gap may exist between the first protection layer 710 and the outer surface 620.

In some implementations, the second protective layer 720 can be disposed between the outer surface 620 and the first protective layer 710, which can mean that the second protective layer 720 can wrap around at least a portion of the outer surface 620 of the pipe body 610, and the first protective layer 710 can wrap around the outer periphery of the side of the second protective layer 720 away from the pipe body 610. It should be appreciated that the second shield layer 720 may not be fixedly connected to the first shield layer 710, and that the second shield layer 720 may not be fixedly connected to the outer surface 620, i.e., a gap may exist between the second shield layer 720 and the first shield layer 710, and a gap may exist between the second shield layer 720 and the outer surface 620.

It should be further understood that the shapes of the first protective layer 710 and the second protective layer 720 in the embodiments of the present application may be set according to actual requirements, and the first protective layer 710 and the second protective layer 720 may be hollow tubular structures, for example.

It should also be appreciated that the heat exchange medium contained within the conduit body 610 may include at least one of a water-based coolant, a glycol-based coolant, a mineral oil, a synthetic oil, and the like.

In some implementations, the second protective layer 720 may also be disposed on the inner surface 630 of the pipe body 610, which may mean that the second protective layer 720 may be coupled to at least a portion of the inner surface 630 of the pipe body 610. It should be appreciated that, in the case where the second protective layer 720 is disposed on the inner surface 630, the thermal insulation performance of the pipe body 610 is easily reduced when the second protective layer 720 is detached or not fixedly connected to the inner surface 630, which causes the risk of ablation or penetration of the pipe body 610, so that the second protective layer 720 needs to be fixedly connected to at least a portion of the inner surface 630 of the pipe body 610, for example, the second protective layer 720 is thermally fused or adhesively connected to the inner surface 630 of the pipe body 610.

It should also be appreciated that in some implementations, the heat exchange device 60 may include two second protective layers 720, wherein one second protective layer 720 is disposed between the outer surface 620 and the first protective layer 710 and the other second protective layer 720 is disposed on the inner surface 630 of the pipe body 610.

In the embodiment of the present application, by providing the heat exchange device 60 in the battery device 10 with the first shielding layer 710 including the pipe body 610 containing the heat exchange medium and the outer surface 620 of the pipe body 610, the first shielding layer 710 is used to block the impact of the exhaust discharged from the battery cell 20 on the pipe body 610, the heat exchange device 60 is further provided with the second shielding layer 720, which is disposed between the outer surface 620 of the pipe body 610 and the first shielding layer 710, and/or the second shielding layer 720 is disposed on the inner surface 630 of the pipe body 610, the second shielding layer 720 is used to thermally isolate the pipe body 610, and in the case that the thermal runaway occurs in the battery cell 20, the high-temperature or high-pressure gas discharged from the battery cell 20 can be effectively blocked by the first shielding layer 710, and at the same time, the second shielding layer 720 can thermally isolate the pipe body 610, so as to reduce the risk of the surface of the pipe body 610 being ablated or the liquid leakage caused by the melting through the pipe body 610 due to the high-temperature environment inside the battery device 10, thereby improving the use performance of the battery device 60.

In some implementations, as shown in fig. 6-11, at least a portion of the tubing body 610 includes a corrugated tubing 640, and the second protective layer 720 covers the corrugated tubing 640.

It should be appreciated that at least a portion of the pipeline body 610 in embodiments of the present application includes the corrugated pipeline 640, which may mean that at least a portion of the pipeline body 610 may be configured as the corrugated pipeline 640, and the corrugated pipeline 640 may absorb thermal expansion and contraction of the pipeline due to temperature changes, and reduce stress of the pipeline, thereby reducing the risk of cracking of the pipeline body 610. Second, the bellows tube 640 has good elasticity to absorb and buffer vibration caused by the flow of the heat exchange medium or external impact, and reduce the influence of the tube body 610 on other devices inside the battery device 10. The corrugated tubing 640 has good flexibility to accommodate various complex installation environments, so that the tubing body 610 is configured in a flexible manner for ease of installation and maintenance.

It should also be appreciated that the second protective layer 720 covers the corrugated pipe 640 may mean that the second protective layer 720 can completely wrap the outer surface of the corrugated pipe 640 to protect the corrugated pipe 640 in a case where the second protective layer 720 is disposed on the outer surface of the corrugated pipe 640, and that the second protective layer 720 is fixedly connected with all inner surfaces of the corrugated pipe 640 to protect the corrugated pipe 640 in a case where the protective layer 720 is disposed on the inner surface of the corrugated pipe 640.

It should also be appreciated that the placement area of the corrugated conduit 640 in the conduit body 610 may be configured according to actual needs, for example, as shown in fig. 5, the corrugated conduit 640 may be disposed in an area of the conduit body 610 near the liquid inlet 730 and/or in an area near the liquid outlet 740 to facilitate assembly of the conduit body 610.

In the embodiment of the present application, at least part of the pipeline body 610 is configured to include the corrugated pipeline 640, so as to facilitate the assembly of the pipeline body 610, and meanwhile, since the corrugated pipeline 640 is easy to break or melt through at high temperature, by configuring the second protection layer 720 to cover the corrugated pipeline 640, the second protection layer 720 can thermally isolate the corrugated pipeline 640 in case that the battery cell 20 is thermally out of control, so as to reduce the risk of liquid leakage caused by ablation of the surface of the corrugated pipeline 640 or melting through the corrugated pipeline 640 due to the high temperature environment inside the battery device 10, and improve the service performance of the heat exchange device 60, thereby improving the service performance of the battery device 10.

It should be understood that, as shown in fig. 6 and 7, in the case where the second protective layer 720 is disposed 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 may be represented by R1, the outer diameter of the first protective layer 710 may be represented by R1, the inner diameter of the second protective layer 720 may be represented by R2, the outer diameter of the second protective layer 720 may be represented by R2, the inner diameter of the pipe body 610 may be represented by R3, and the outer diameter of the pipe body 610 may be represented by R3.

In some implementations, as shown in fig. 6 and 7, the second protective layer 720 is disposed between the outer surface 620 of the pipe body 610 and the first protective layer 710, wherein an inner diameter R1 of the first protective layer 710 and an outer diameter R2 of the second protective layer 720 satisfy that R1-R2 is 1mm or more, and an inner diameter R2 of the second protective layer 720 and an outer diameter R3 of the pipe body 610 satisfy that R2-R3 is 1mm or more, on a plane perpendicular to an extending direction of the pipe body 610.

Illustratively, the difference R1-R2 between the inner diameter R1 of the first shielding 710 and the outer diameter R2 of the second shielding 720 may be set to be 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 3mm, 4mm, 5mm, etc., or a value thereof within a range obtained by combining any two values thereof, on a plane perpendicular to the extending direction of the pipe body 610. Illustratively, the difference R2-R3 between the inner diameter R2 of the second protective layer 720 and the outer diameter R3 of the pipe body 610 may be set to 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 3mm, 4mm, 5mm, etc., or a value thereof within a range obtained by combining any two values.

In the embodiment of the present application, the second protection layer 720 is disposed between the outer surface 620 of the pipe body 610 and the first protection layer 710, and on a plane perpendicular to the extending direction of the pipe body 610, the inner diameter R1 of the first protection layer 710 and the outer diameter R2 of the second protection layer 720 are set to satisfy R1-R2 being greater than or equal to 1mm, and the inner diameter R2 of the second protection layer 720 and the outer diameter R3 of the pipe body 610 are set to satisfy R2-R3 being greater than or equal to 1mm, so as to facilitate the assembly among the first protection layer 710, the second protection layer 720 and the pipe body 610, thereby improving the service performance of the heat exchange device 60.

In some implementations, as shown in FIG. 6, the second shielding layer 720 is disposed between the outer surface 620 of the corrugated pipe 610 and the first shielding layer 710, wherein the length L1 of the first shielding layer 710 and the length L2 of the second shielding layer 720 satisfy that L1 is greater than or equal to L2, and the length L2 of the second shielding layer 720 and the length L3 of the corrugated pipe 640 satisfy that L2-L3 is greater than or equal to 5mm along the extending direction of the pipe body 610.

Illustratively, the difference L2-L3 between the length L2 of the second protective layer 720 and the length L3 of the corrugated pipe 640 may be set to be 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., or a value thereof within a range obtained by combining any two of the above values.

In the embodiment of the application, the second protection layer 720 is disposed between the outer surface 620 of the corrugated pipe 610 and the first protection layer 710, and the use performance of the heat exchange device 60 is improved by setting the length L1 of the first protection layer 710 and the length L2 of the second protection layer 720 to be L1-L2, and the length L2 of the second protection layer 720 and the length L3 of the corrugated pipe 640 to be L3-L1-L3-5 mm along the extending direction of the pipe body 610 and considering the protection performance of the corrugated pipe 640 and the assembly tolerance among the first protection layer 710, the second protection layer 720 and the corrugated pipe 640.

In some implementations, as shown in fig. 8 and 9, the first protective layer 710 and the second protective layer 720 are a unitary structure 70.

It should be understood that, in the embodiment of the present application, the structure 70 of the first protection layer 710 and the second protection layer 720 of the pipe body as one body may mean that the first protection layer 710 having the function of blocking the impact of the discharged material of the battery cell 20 to the pipe body 610 and the second protection layer 720 for realizing the thermal insulation of the pipe body 610 are thermally formed or fixedly connected, such that the first protection layer 710 and the second protection layer 720 form an integral structure, and the formed integral structure 70 is wrapped on the outer surface 620 of the pipe body 610 to protect the pipe body 610.

In the embodiment of the present application, the first protection layer 710 and the second protection layer 720 are configured as the integrated structure 70, so that the impact performance of the integrated structure 70 for blocking the exhaust discharged from the battery unit 20 to the pipe body 610 and the thermal insulation performance of the pipe body 610 are both considered, the space occupied by the integrated structure 70 in the first accommodating cavity 50 can be reduced, the energy density of the battery unit 20 is improved, and the service performance of the battery device 10 is improved, and meanwhile, the assembly process is saved.

In some implementations, the maximum thickness D1 of the unitary structure 70 satisfies 0mm < D1 +.1 mm.

Illustratively, the maximum thickness D1 of the unitary structure 70 may be set to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., or values thereof within the ranges obtained by combining any two of the above values.

In the embodiment of the present application, by arranging 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 be 0mm < D1 less than or equal to 1mm, the thickness of the integrated structure 70 can be adjusted to reduce the internal space of the first accommodating cavity 50 occupied by the pipe body 610, thereby improving the energy density of the battery cell 20, improving the service performance of the battery device 10 and saving the assembly process while considering the impact performance of the integrated structure 70, which blocks the discharged emissions of the battery cell 20, on the pipe body 610 and the thermal insulation performance of the pipe body 610.

It should be understood that, as shown in fig. 10 and 11, in the case where the first protective layer 710 is disposed on the outer surface 620 of the pipe body 610 and the second protective layer 720 is disposed on the inner surface 630 of the pipe body 610, the inner diameter of the first protective layer 710 in the embodiment of the present application may be represented by R4, the outer diameter of the first protective layer 710 may be represented by R4, the inner diameter of the second protective layer 720 may be represented by R5, the outer diameter of the second protective layer 720 may be represented by R5, the inner diameter of the pipe body 610 may be represented by R6, and the outer diameter of the pipe body 610 may be represented by R6.

In some implementations, as shown in FIGS. 10 and 11, the first protective layer 710 is disposed on the outer surface 620 of the pipe body 610 and the second protective layer 720 is disposed on the inner surface 630 of the pipe body 610, wherein an inner diameter R4 of the first protective layer 710 and an outer diameter R6 of the pipe body 610 satisfy that R4-R6 is equal to or greater than 1mm, and an outer diameter R5 of the second protective layer 720 and an inner diameter R6 of the pipe body 610 satisfy that R6-R5 is equal to or greater than 0mm and equal to or less than 1mm on a plane perpendicular to an extending direction of the pipe body 610.

Illustratively, the difference R4-R6 between the inner diameter R4 of the first protective layer 710 and the outer diameter R6 of the pipe body 610 may be set to 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 3mm, 4mm, 5mm, etc., or a value thereof within a range obtained by combining any two of the above values.

Illustratively, 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 may be set to be 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., or a value thereof within a range obtained by combining any two of the above values. It should be appreciated that in the case that the difference R6-R5 between the outer diameter R5 of the second shielding 720 and the inner diameter R6 of the pipe body 610 is equal to 0mm, the second shielding 720 is fixedly connected with the inner surface 630 of the pipe body 610.

In the embodiment of the present application, when the first protection layer 710 is disposed on the outer surface 620 of the pipe body 610 and the second protection layer 720 is disposed on the inner surface 630 of the pipe body 610, on a plane perpendicular to the extending direction of the pipe body 610, the service performance of the heat exchange device 60 is improved by setting the inner diameter R4 of the first protection layer 710 and the outer diameter R6 of the pipe body 610 to be equal to or greater than 1mm, and setting the outer diameter R5 of the second protection layer 720 and the inner diameter R6 of the pipe body 610 to be equal to or less than 0mm and equal to or less than 6-R5 and less than 1mm, so as to facilitate the assembly between the first protection layer 710, the second protection layer 720 and the pipe body 610.

In some implementations, as shown in FIG. 10, the first protection layer 710 is disposed on the outer surface of the corrugated pipe 640, and the second protection layer 720 is disposed on the inner surface of the corrugated pipe 640, wherein, along the extending direction of the pipe body 610, the length L4 of the first protection layer 710 and the length L6 of the corrugated pipe 640 satisfy that L4-L6 is equal to or greater than 5mm, and the length L5 of the second protection layer 720 and the length L6 of the corrugated pipe 640 satisfy that L5-L6 is equal to or greater than 5mm.

Illustratively, the difference L4-L6 between the length L4 of the first protective layer 710 and the length L6 of the corrugated tubing 640 may be set to be 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., or a value thereof within a range obtained by a combination of any two of the above. The difference L5-L6 between the length L5 of the second protective layer 720 and the length L6 of the corrugated pipe 640 may be set to 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., or a value thereof within a range obtained by combining any two of the above values.

In the embodiment of the application, the first protection layer 710 is disposed on the outer surface of the corrugated pipe 640, and the second protection layer 720 is disposed on the inner surface of the corrugated pipe 640, so that the use performance of the heat exchange device 60 is improved by satisfying the length L4 of the first protection layer 710 and the length L6 of the corrugated pipe 640 as L4-L6 being equal to or greater than 5mm, and the length L5 of the second protection layer 720 and the length L6 of the corrugated pipe 640 as L5-L6 being equal to or greater than 5mm along the extending direction of the pipe body 610, so as to take into account the assembly tolerance between the protection performance of the corrugated pipe 640 and the first protection layer 710, the second protection layer 720 and the corrugated pipe 640.

In some implementations, the second protective layer 720 is thermally fused or adhesively bonded to the inner surface 630 of the pipe body 610.

It should be understood that in the case where the second protective layer 720 is thermally fused or adhesively bonded 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 may be 0mm in a plane perpendicular to the extending direction of the pipe body 610.

In the embodiment of the present application, the second protection layer 720 is connected to the inner surface 630 of the pipe body 610 by hot melting or bonding, so as to achieve both the service performance of the pipe body 610 and the bonding strength between the second protection layer 720 and the inner surface 630 of the pipe body 610, and the connection mode is simple and convenient for processing and manufacturing.

In some implementations, the heat resistant temperature of the material of the first protective layer 710 is greater than or equal to 500 ℃, and/or the heat resistant temperature of the material of the second protective layer 720 is greater than or equal to 500 ℃.

It should be understood that the heat resistant temperature of a material in embodiments of the present application refers to the highest temperature that the material can withstand, below which the material does not undergo a physical or chemical change or damage.

When testing the material of the first protective layer 710, a part of the material of the first protective layer 710 may be obtained, for example, cutting a certain area of the first protective layer 710, using a flame gun to control the temperature of the outer surface of the first protective layer 710 to be greater than or equal to 800 ℃, and continuing for 20s, detecting whether perforation occurs on the surface of the first protective layer 710, and if perforation does not occur, the material of the first protective layer 710 meets the use requirement. Or when testing the material of the second protective layer 720, a part of the material of the second protective layer 720 may be obtained, for example, a second protective layer 720 with a certain area is cut, a flame 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 ℃, and the temperature is maintained for 20 seconds, so as to detect whether the surface of the second protective layer 720 is perforated, and if no perforation occurs, the material of the second protective layer 720 meets the use requirement.

It should also be appreciated that, since the first protection layer 710 is used to block the impact of the exhaust discharged from the battery cell 20 on the pipe body 610, the temperature of the first protection layer 710 itself will be increased continuously during the protection process of the pipe body 610, and by providing the second protection layer 720 with a suitable heat-resistant temperature to thermally isolate at least a portion of the pipe body 610, the risk of the surface of the pipe body 610 being ablated or melting through the pipe body 610 due to the high temperature environment inside the battery device 10 is reduced, and the service performance of the heat exchange device 60 is improved.

In the embodiment of the present application, the heat-resistant temperature of the material of the first protection layer is set to be greater than or equal to 500 ℃, and/or the heat-resistant temperature of the material of the second protection layer 720 is set to be greater than or equal to 500 ℃, so as to consider the thermal insulation performance of the second protection layer 720 and the thermal influence of the first protection layer 710 on the second protection layer 720, reduce the risk that the first protection layer 710 causes ablation or penetration on the second protection layer 720 in the heating process, and effectively protect the pipe body 610, thereby improving the service performance of the heat exchange device 60.

In some implementations, the material of the second protective layer 720 includes at least one of fiberglass, mica flakes, aerogel, pre-oxidized filaments.

In the embodiment of the present application, the material of the second protection layer 720 is set to include at least one of glass fiber, mica sheet, aerogel, and pre-oxidized fiber, so as to effectively improve the thermal insulation performance of the second protection layer 720, so as to thermally isolate the pipe body 610, thereby improving the service performance of the heat exchange device 60.

In some implementations, the material of the first protective layer 710 includes a phase change material or a ceramic composite tape.

It should be understood that phase change materials in embodiments of the present application refer to materials that store and release heat at a particular temperature through a phase change, such as melting, solidification, evaporation, condensation, and the like. These materials are capable of absorbing or releasing a large amount of thermal energy upon temperature changes and are therefore widely used for temperature regulation, thermal management, and energy storage applications. Specifically, each phase change material has a specific phase change temperature at which the material changes phase, thereby storing or releasing heat. In the phase change process, the material can absorb or release a large amount of heat energy, and the energy transfer efficiency is high although the temperature change is small. The phase change material may undergo the phase change process multiple times without significant performance degradation. The ceramic composite belt in the embodiment of the application can be formed by coating and laminating ceramic fireproof and refractory silicon rubber and high-temperature-resistant glass fiber cloth serving as base materials.

In the embodiment of the present application, the material of the first protection layer 710 is configured to include a phase change material or a ceramic composite tape, so that in case of thermal runaway of the battery cell 20, the anti-impact or blocking performance of the high temperature or high pressure gas discharged from the battery cell 20 is effectively improved, so that the pipe body 610 is effectively protected, and thus the service performance of the heat exchange device 60 is improved.

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

It should be understood that, in the embodiment of the present application, the external device located outside the case 11 may exchange heat with the battery unit 20 inside the battery device 10 through the liquid inlet 730 and the liquid outlet 740 provided on the case 11, the heat exchange medium generated by the external device may 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 to the external device through the liquid outlet 740, i.e. a circulation loop for flowing the heat exchange medium is formed between the external device and the pipe body 610, so as to continuously regulate the temperature of the battery device 10. It should also be appreciated that the external device may include a heat exchanger for cooling the heat exchange medium flowing out through the outlet 740 and a pump for re-flowing the cooled heat exchange medium into the pipe body 610 through the inlet 730 to continuously regulate the temperature of the battery device 10.

In the embodiment of the present application, by arranging the heat exchange device 60 to further include a heat exchange plate 750 and two pipeline bodies 610, and arranging a liquid inlet 730 and a liquid outlet 740 on the surface of the box 11, which are communicated with the outside, one end of a first pipeline body 611 in the two pipeline bodies 610 is communicated with the liquid inlet 730, the other end of the first pipeline body 611 is communicated with the heat exchange plate 750, one end of a second pipeline body 612 in the two pipeline bodies 610 is communicated with the liquid outlet 740, and the other end of the second pipeline body 612 is communicated with the heat exchange plate 750, that is, a heat exchange medium provided by an 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 facilitate heat exchange with the battery cell 20, reduce the risk of thermal runaway of the battery cell 20, and improve the service performance of the battery device 10.

According to some embodiments of the present application, there is further provided a powered device, including the battery device 10 of any of the above embodiments, where the battery device 10 is configured to provide power to the powered device. Specifically, the electric device may be the vehicle 1 shown in fig. 1, or may be any electric device using the battery device 10.

The powered device may be any of the devices or systems described above that employ battery assembly 10.

According to some embodiments of the present application, referring to fig. 5 to 11, there is provided a battery device 10, the battery device 10 including a case 11, a battery cell 20, and a heat exchanging device 60, the case 11 having a first receiving chamber 50, the battery cell 20 being received in the first receiving chamber 50, the heat exchanging device 60 being received in the first receiving chamber 50 and disposed adjacent to the battery cell 20, the heat exchanging device 60 being configured to exchange heat with the battery cell 20, the heat exchanging device 60 including a pipe body 610 receiving a heat exchanging medium, and a first shielding layer 710 disposed on an outer surface 620 of the pipe body 610, the first shielding layer 710 being configured to block an impact of an exhaust discharged from the battery cell 20 on the pipe body 610, the heat exchanging device 60 further including a second shielding layer 720 disposed between the outer surface 620 of the pipe body 610 and the first shielding layer 710, and/or the second shielding layer 720 being disposed on an inner surface 630 of the pipe body 610, the second shielding layer 720 being configured to thermally isolate the pipe body 610. At least a portion of the tubing body 610 includes a corrugated tubing 640, and the second protective layer 720 covers the corrugated tubing 640. The second protection layer 720 is disposed between the outer surface 620 of the pipeline body 610 and the first protection layer 710, wherein on a plane perpendicular to the extending direction of the pipeline body 610, an inner diameter R1 of the first protection layer 710 and an outer diameter R2 of the second protection layer 720 satisfy that R1-R2 is greater than or equal to 1mm, and an inner diameter R2 of the second protection layer 720 and an outer diameter R3 of the pipeline body 610 satisfy that R2-R3 is greater than or equal to 1mm. Along the extending direction of the pipeline body 610, the length L1 of the first protection layer 710 and the length L2 of the second protection layer 720 meet that L1 is greater than or equal to L2, and the length L2 of the second protection layer 720 and the length L3 of the corrugated pipeline 640 meet that L2-L3 is greater than or equal to 5mm.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by comprising:

the box body is provided with a first accommodating cavity;

a battery cell accommodated in the first accommodation chamber;

The heat exchange device is accommodated in the first accommodating cavity and is arranged close to the battery cell, and the heat exchange device is used for exchanging heat with the battery cell;

The heat exchange device comprises a pipeline body for containing heat exchange medium and a first protective layer arranged on the outer surface of the pipeline body, wherein the first protective layer is used for blocking the impact of the discharged matters discharged by the battery cells on the pipeline body,

The heat exchange device further comprises a second protective layer, wherein the second protective layer is arranged between the outer surface of the pipeline body and the first protective layer, and/or is arranged on the inner surface of the pipeline body and is used for thermally isolating the pipeline body.

2. The battery device of claim 1, wherein at least a portion of the tubing body comprises a corrugated tubing, the second protective layer covering the corrugated tubing.

3. The battery device of claim 2, wherein the second protective layer is disposed between the outer surface of the pipe body and the first protective layer,

On a plane perpendicular to the extending direction of the pipeline body, the inner diameter R1 of the first protective layer and the outer diameter R2 of the second protective layer meet that R1-R2 is more than or equal to 1mm, and the inner diameter R2 of the second protective layer and the outer diameter R3 of the pipeline body meet that R2-R3 is more than or equal to 1mm.

4. The battery device according to claim 2 or 3, wherein the second shield layer is provided between an outer surface of the corrugated pipe and the first shield layer,

The length L1 of the first protective layer and the length L2 of the second protective layer are equal to or greater than L1 and equal to or greater than L2, and the length L2 of the second protective layer and the length L3 of the corrugated pipeline are equal to or greater than L2-L3 and equal to or greater than 5mm along the extending direction of the pipeline body.

5. The battery device of claim 3 or 4, wherein the first protective layer and the second protective layer are of unitary construction.

6. The battery device according to claim 5, wherein the maximum thickness D1 of the integrated structure satisfies 0mm < D1≤1 mm.

7. The battery device according to claim 2, wherein the first protective layer is provided on an outer surface of the pipe body, and the second protective layer is provided on an inner surface of the corrugated pipe,

On a plane perpendicular to the extending direction of the pipeline body, the inner diameter R4 of the first protective layer and the outer diameter R6 of the pipeline body meet that R4-R6 is more than or equal to 1mm, and the outer diameter R5 of the second protective layer and the inner diameter R6 of the pipeline body meet that R6-R5 is more than or equal to 0mm and less than or equal to 1mm.

8. The battery device according to claim 2 or 7, wherein the first shield layer is provided on an outer surface of the corrugated pipe, and the second shield layer is provided on an inner surface of the corrugated pipe,

The length L4 of the first protective layer and the length L6 of the corrugated pipeline are equal to or greater than 5mm along the extending direction of the pipeline body, and the length L5 of the second protective layer and the length L6 of the corrugated pipeline are equal to or greater than 5mm.

9. The battery device according to claim 7 or 8, wherein the second protective layer is thermally fused or adhesively bonded to the inner surface of the pipe body.

10. The battery device according to any one of claims 1 to 9, wherein the material of the first protective layer has a heat-resistant temperature of 500 ℃ or higher, and/or,

The heat-resistant temperature of the material of the second protective layer is greater than or equal to 500 ℃.

11. The battery device according to any one of claims 1 to 10, wherein the material of the second protective layer comprises at least one of glass fiber, mica sheet, aerogel, pre-oxidized fiber.

12. The battery device of any one of claims 1 to 11, wherein 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, wherein the heat exchange device further comprises a heat exchange plate and two pipe bodies, a liquid inlet and a liquid outlet which are communicated with the outside are formed in the surface of the box body, one end of a first pipe body of the two pipe bodies is communicated with the liquid inlet, the other end of the first pipe body is communicated with the heat exchange plate, one end of a second pipe body of the two pipe bodies is communicated with the liquid outlet, and the other end of the second pipe body is communicated with the heat exchange plate.

14. A powered device comprising a battery device as claimed in any one of claims 1 to 13 for providing electrical energy to the powered device.