Battery device, power utilization device and energy storage device

Abstract

The utility model discloses a battery device, a power utilization device and an energy storage device. The battery device comprises a plurality of battery monomers; the heat exchange assembly comprises heat exchange pieces and connecting pipes, heat exchange flow channels are formed in the heat exchange pieces, the number of the heat exchange pieces is multiple, the heat exchange pieces are arranged at intervals in the first direction, the battery monomers are arranged between every two adjacent heat exchange pieces, and the connecting pipes are connected between every two adjacent heat exchange pieces; the protruding structure is arranged on the peripheral face of the connecting pipe, in the second direction, the distance between the protruding structure and the battery single bodies is smaller than the distance between the peripheral face of the connecting pipe and the battery single bodies, the protruding structure comprises a first rib layer and a second rib layer which are arranged in the radial direction of the connecting pipe, and the second rib layer is connected with the connecting pipe through the first rib layer; the second rib layer is a heat insulation material piece. According to the technical scheme, the first rib layer and the second rib layer are arranged on the peripheral surface of the connecting pipe, so that the connecting pipe can be effectively protected, and the reliability of the battery device is improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development. In order to ensure the reliability and long life cycle of electric vehicle batteries, it is usually necessary to design a cooling system to cool the cells and modules in the battery pack.

[0003] In the prior art, the cooling system used by the battery of an electric vehicle is mostly a water cooling system, which usually requires a heat exchanger and a connecting hose. When the battery of an electric vehicle experiences thermal runaway, it will generate high temperature and expand and deform, which will cause the connecting hose to be damaged, affecting the cooling performance of the cooling system. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application is to provide a battery device, and an electric device and an energy storage device including the battery device, which can reduce the possibility of direct contact between the battery cell and the outer peripheral surface of the connecting tube when the battery cell undergoes thermal runaway and expands and deforms, thereby effectively protecting the connecting tube and improving the reliability of the battery device.

[0005] In the first aspect, an embodiment of the present application provides a battery device, comprising: a plurality of battery cells; a heat exchange assembly, the heat exchange assembly comprising a heat exchange member and a connecting pipe, a heat exchange flow channel being formed in the heat exchange member, the number of the heat exchange members being multiple and arranged at intervals along a first direction, the battery cells being arranged between two adjacent heat exchange members, the connecting pipe being arranged on at least one side of the plurality of battery cells in a second direction and connected between two adjacent heat exchange members, the second direction intersecting with the first direction; a protruding structure, the protruding structure being arranged on the outer peripheral surface of the connecting pipe, in the second direction, the spacing between the protruding structure and the battery cells is smaller than the spacing between the outer peripheral surface of the connecting pipe and the battery cells, the protruding structure comprising a first rib layer and a second rib layer arranged along the radial direction of the connecting pipe, the second rib layer being connected to the connecting pipe through the first rib layer, and the second rib layer being a heat insulating material member.

[0006] In the above technical solution, by arranging the protruding structure on the outer peripheral surface of the connecting tube, in the second direction, the distance between the protruding structure and the battery cell is smaller than the distance between the outer peripheral surface of the connecting tube and the battery cell, and a first rib layer and a second rib layer arranged along the radial direction of the connecting tube are arranged in the protruding structure, the second rib layer is connected to the connecting tube through the first rib layer, and the second rib layer is a heat-insulating material member, which can reduce the possibility of direct contact between the battery cell and the outer peripheral surface of the connecting tube when the battery cell expands and deforms due to thermal runaway, thereby effectively protecting the connecting tube and further improving the reliability of the battery device.

[0007] In some embodiments of the present application, the protruding structure is a heat-insulating material.

[0008] In the above technical solution, by setting the protruding structure as a heat-insulating material, the heat transferred to the connecting pipe can be significantly reduced, thereby effectively reducing the possibility of the connecting pipe being damaged due to excessive temperature, thereby effectively improving the service life and reliability of the connecting pipe.

[0009] In some embodiments of the present application, the heat-resistant temperature of the protrusion structure is greater than or equal to 300°C.

[0010] In the above technical solution, by setting the heat resistance temperature of the protruding structure to be greater than or equal to 300°C, the stability and reliability of the physical and chemical properties of the protruding structure can be effectively improved, thereby effectively improving the high temperature resistance of the protruding structure, and then effectively improving the thermal insulation effect of the protruding structure.

[0011] In some embodiments of the present application, the protruding structure extends in an arc shape or a ring shape along the circumference of the connecting pipe.

[0012] In the above technical solution, by extending the raised structure into an arc or ring shape along the circumference of the connecting pipe, not only can the protection range of the raised structure for the connecting pipe be effectively increased, but also the heat dissipation efficiency of the raised structure can be effectively improved, and the risk of local overheating of the raised structure can be reduced, thereby effectively improving the durability of the raised structure.

[0013] In some embodiments of the present application, the first rib layer and the connecting pipe are integrally formed; and / or the second rib layer and the first rib layer are integrally connected by injection molding.

[0014] In the above technical solution, the first rib layer and the connecting tube are integrally formed, which can not only effectively improve the structural strength of the connection between the first rib layer and the connecting tube, but also simplify the production process and reduce the assembly steps, thereby effectively reducing production costs and improving production efficiency; the second rib layer and the first rib layer are connected as one by injection molding, which can not only effectively increase the mechanical strength of the raised structure, but also effectively improve the thermal insulation performance of the raised structure.

[0015] In some embodiments of the present application, a fixing groove is formed on one of the first rib layer and the second rib layer, and a portion of the other of the first rib layer and the second rib layer fits into the fixing groove to fix the first rib layer to the second rib layer.

[0016] In the above technical solution, by setting a fixing groove on one of the first rib layer and the second rib layer, and fitting a part of the other one of the first rib layer and the second rib layer into the fixing groove so that the first rib layer and the second rib layer are fixedly connected, the structural construction of the protruding structure can be effectively simplified, and the assembly process of the protruding structure can be effectively simplified, thereby effectively reducing costs.

[0017] In some embodiments of the present application, the fixing groove extends in an arc shape or a ring shape along the circumference of the connecting pipe.

[0018] In the above technical solution, by extending the fixing groove into an arc or a ring shape along the circumference of the connecting tube, the fixing groove can be evenly distributed in the circumferential direction of the connecting tube, thereby effectively improving the stability of the connection between the first rib layer and the second rib layer, and can effectively disperse the stress between the first rib layer and the second rib layer, reduce local stress concentration, and effectively improve the durability of the protruding structure.

[0019] In some embodiments of the present application, a first limiting portion is formed on the first rib layer, and a second limiting portion is formed on the second rib layer. The first limiting portion cooperates with the second limiting portion to limit the relative movement of the first rib layer and the second rib layer in the circumferential direction of the connecting tube.

[0020] In the above technical solution, the first limiting portion and the second limiting portion cooperate to effectively limit the relative movement of the first rib layer and the second rib layer in the circumferential direction of the connecting tube, thereby effectively limiting the rotation of the protruding structure relative to the connecting tube, thereby effectively improving the stability of the protruding structure.

[0021] In some embodiments of the present application, one of the first limiting portion and the second limiting portion is formed as a limiting protrusion and the other is formed as a limiting groove, and the limiting protrusion fits in the limiting groove.

[0022] In the above technical solution, by setting a limiting protrusion on one of the first limiting part and the second limiting part and setting a limiting groove on the other, the limiting protrusion cooperates in the limiting groove, which can effectively simplify the structural structure of the first limiting part and the second limiting part, thereby effectively simplifying the processing steps of the protrusion structure, and then effectively improving the processing efficiency of the protrusion structure.

[0023] In some embodiments of the present application, there are multiple first limiting portions, which are arranged at intervals along the circumference of the connecting tube, and there are multiple second limiting portions, which correspond one-to-one to the first limiting portions.

[0024] In the above technical solution, multiple first limiting portions are arranged at intervals along the circumference of the connecting tube, and the number of second limiting portions is multiple and corresponds one-to-one with the first limiting portions, which can effectively disperse the force between the first limiting portions and the second limiting portions along the circumferential direction of the connecting tube, thereby effectively reducing the risk of structural damage due to stress concentration, and further effectively improving the stability and reliability of the protruding structure.

[0025] In some embodiments of the present application, the fixing groove is formed on the second rib layer and opens radially inwardly along the connecting pipe, and the outer end of the first rib layer in the radial direction of the connecting pipe fits into the fixing groove.

[0026] In the above technical solution, by forming a fixing groove on the second rib layer and opening it radially inward along the connecting tube, the outer end of the first rib layer in the radial direction of the connecting tube fits into the fixing groove, which can effectively limit the movement of the second rib layer in the axial direction of the connecting tube, thereby effectively improving the stability of the protruding structure.

[0027] In some embodiments of the present application, in the axial direction of the connecting tube, the ratio of the width of the first rib layer to the width of the protruding structure is greater than or equal to 0.2 and less than or equal to 0.8; and / or, in the radial direction of the connecting tube, the ratio of the height of the first rib layer to the height of the protruding structure is greater than or equal to 0.2 and less than or equal to 0.5.

[0028] In the above technical solution, by setting the ratio of the width of the first rib layer to the width of the protruding structure to be greater than or equal to 0.2 and less than or equal to 0.8, and / or setting the ratio of the height of the first rib layer to the height of the protruding structure to be greater than or equal to 0.2 and less than or equal to 0.5, the size ratio of the first rib layer to the second rib layer can be optimized, thereby effectively improving the rationality of the force applied to the protruding structure, and further effectively improving the mechanical properties of the protruding structure.

[0029] In some embodiments of the present application, the fixing groove is formed on the first rib layer and opens outward in the radial direction of the connecting pipe, and the inner end of the second rib layer in the radial direction of the connecting pipe fits in the fixing groove.

[0030] In the above technical solution, by forming a fixing groove on the first rib layer and opening it radially outward along the connecting tube, the inner end of the second rib layer in the radial direction of the connecting tube is fitted into the fixing groove, which can effectively limit the movement of the second rib layer in the axial direction of the connecting tube, thereby effectively improving the stability of the protruding structure.

[0031] In some embodiments of the present application, in the radial direction of the connecting tube, the height of the first rib layer is greater than or equal to 0.3 mm and less than or equal to the distance between the side surface of the second rib layer facing away from the connecting tube and the outer peripheral surface of the connecting tube.

[0032] In the above technical solution, by setting the height of the first rib layer to be greater than or equal to 0.3 mm and less than or equal to the distance between the surface of the second rib layer on the side facing away from the connecting tube and the outer peripheral surface of the connecting tube, not only can the first rib layer have sufficient structural strength in the radial direction of the connecting tube, thereby effectively enhancing the structural stability of the first rib layer in the radial direction of the connecting tube, but the second rib layer can also be arranged on the outside of the first rib layer in the radial direction of the connecting tube, thereby effectively reducing the risk of direct contact between the first rib layer and the battery cell, thereby effectively protecting the first rib layer.

[0033] In some embodiments of the present application, in the axial direction of the connecting tube, the distance between the end surface of the first rib layer and the adjacent side wall of the fixing groove is greater than or equal to 0.3 mm.

[0034] In the above technical solution, by setting the spacing between the end face of the first rib layer and the adjacent side wall of the fixing groove to be greater than or equal to 0.3 mm, the first rib layer can have sufficient structural strength in the axial direction of the connecting tube, thereby effectively enhancing the structural stability of the first rib layer in the axial direction of the connecting tube.

[0035] In some embodiments of the present application, in the radial direction of the connecting tube, the height of the protruding structure is greater than or equal to 1 mm and less than or equal to 4 mm; and / or, in the axial direction of the connecting tube, the width of the protruding structure is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0036] In the above technical solution, by setting the height of the protruding structure to be greater than or equal to 1 mm and less than or equal to 4 mm, and / or setting the width of the protruding structure to be greater than or equal to 0.5 mm and less than or equal to 5 mm, the protruding structure can have sufficient strength and rigidity in the radial direction of the connecting pipe and / or the circumferential direction of the connecting pipe, thereby effectively improving the reliability and durability of the protruding structure.

[0037] In some embodiments of the present application, a connecting pipe portion is provided on the heat exchange component, the connecting pipe portion extends along the first direction, and one end of the connecting pipe portion extends into the connecting pipe and is plug-connected with the connecting pipe.

[0038] In the above technical solution, one end of the connecting pipe is extended into the connecting pipe and connected with the connecting pipe. This can not only effectively improve the strength and stability of the connection between the heat exchanger and the connecting pipe, thereby effectively improving the reliability of the connection, but also effectively simplify the connection method between the heat exchanger and the connecting pipe, thereby effectively improving the assembly efficiency.

[0039] In some embodiments of the present application, in the first direction, the distance between the connecting pipe portion and the protruding structure is greater than or equal to 1 mm.

[0040] In the above technical solution, the spacing between the connecting pipe part and the protruding structure is set to be greater than or equal to 1 mm, which can effectively reduce the possibility of interference between the connecting pipe part and the first rib layer of the protruding structure, thereby effectively reducing the risk of leakage at the connection between the connecting pipe part and the connecting tube, and further effectively improving the reliability of the connection between the connecting pipe part and the connecting tube.

[0041] In some embodiments of the present application, the connecting pipe includes a main pipe section and a guide section, the guide section is connected to both ends of the main pipe section in a first direction, the diameter of the guide section gradually increases in the direction from the main pipe section toward the guide section, and the protrusion structure is arranged on the outer peripheral surface of the main pipe section.

[0042] In the above technical solution, the guide section is connected to both ends of the main pipe section in the first direction, and the diameter of the guide section is set to gradually increase in the direction from the main pipe section toward the guide section. This can not only effectively reduce the difficulty of assembly, thereby effectively improving the assembly efficiency, but also effectively reduce the wear on the connecting pipe and reduce the risk of damage to the connecting pipe, thereby effectively increasing the service life of the connecting pipe.

[0043] In some embodiments of the present application, the connecting pipe includes a structural layer and an elastic layer stacked radially inward and outward along the connecting pipe. The elastic layer is arranged radially inward of the structural layer and is injection molded as a whole with the structural layer. The elastic layer can be elastically deformed.

[0044] In the above technical solution, a structural layer and an elastic layer are arranged in a radially inner and outer stacked manner in the connecting pipe. The elastic layer is arranged on the radial inner side of the structural layer and is injection molded as a whole with the structural layer. The elastic layer can be elastically deformed, which can not only effectively improve the strength, rigidity and sealing of the connecting pipe, but also effectively simplify the processing process of the connecting pipe, thereby effectively improving the processing efficiency of the connecting pipe.

[0045] In a second aspect, an embodiment of the present application provides an electrical device, which includes a battery device according to the first aspect of the present application, and the battery device is used to provide electrical energy.

[0046] In the above technical solution, by setting the battery device of the first aspect in the electrical device, the protruding structure of the battery device is arranged on the outer peripheral surface of the connecting tube, and in the second direction, the distance between the protruding structure and the battery cell is smaller than the distance between the outer peripheral surface of the connecting tube and the battery cell. When the battery cell expands and deforms due to thermal runaway, the possibility of direct contact between the battery cell and the outer peripheral surface of the connecting tube is reduced, thereby effectively protecting the connecting tube and further improving the reliability of the electrical device.

[0047] In a third aspect, an embodiment of the present application provides an energy storage device, which includes a battery device according to the first aspect of the present application.

[0048] In the above technical solution, by arranging the battery device of the above-mentioned first aspect in the energy storage device, the protruding structure of the battery device is arranged on the outer peripheral surface of the connecting tube, and in the second direction, the distance between the protruding structure and the battery cell is smaller than the distance between the outer peripheral surface of the connecting tube and the battery cell, which can reduce the possibility of direct contact between the battery cell and the outer peripheral surface of the connecting tube when the battery cell undergoes thermal runaway and expands and deforms, thereby effectively protecting the connecting tube and further improving the reliability of the energy storage device.

[0049] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application;

[0051] Figure 2 is a schematic structural diagram of a battery device according to an embodiment of the present application;

[0052] Figure 3 is a schematic structural diagram of a connecting pipe according to some embodiments of the present application;

[0053] Figure 4 is a schematic structural diagram of a connecting pipe according to other embodiments of the present application;

[0054] Figure 5 is an exploded view of a connecting pipe according to some embodiments of the present application;

[0055] Figure 6 is an exploded view of a connecting pipe according to some other embodiments of the present application;

[0056] Figure 7 is a schematic structural diagram of a second tendon layer according to some embodiments of the present application;

[0057] Figure 8 is a schematic structural diagram of a second tendon layer according to other embodiments of the present application;

[0058] Fig. 9 is a schematic structural diagram of a structural layer of a connecting pipe according to some embodiments of the present application;

[0059] Fig.10 is a schematic diagram of the structure of the structural layer of the connecting pipe according to other embodiments of the present application;

[0060] Fig.11 is a schematic structural diagram of a structural layer of a connecting pipe according to some embodiments of the present application;

[0061] Fig.12is a schematic structural diagram of a connecting pipe according to some embodiments of the present application;

[0062] Fig.13 is a schematic structural diagram of a connecting pipe according to other embodiments of the present application;

[0063] Fig.14 It is a schematic diagram of the structure of the connecting portion according to an embodiment of the present application.

[0064] Reference numerals:

[0065] 1. Electrical devices;

[0066] 100. Battery device;

[0067] 10. Battery cells;

[0068] 20. Heat exchange components;

[0069] 21. heat exchange component; 211. connecting pipe;

[0070] 22, connecting pipe; 221, main pipe section; 222, guide section; 223, structural layer; 224, elastic layer;

[0071] 23. Inlet pipe section;

[0072] 24. Outlet pipe section;

[0073] 30. Raised structure;

[0074] 31. first rib layer; 311. first fixing groove; 312. first limiting portion;

[0075] 32. second rib layer; 321. second fixing groove; 322. second limiting portion;

[0076] 41. Box body;

[0077] 200, controller;

[0078] 300, motor;

[0079] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0080] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0082] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0083] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0084] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0085] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0086] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0087] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0088] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include one or more battery cells. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0089] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0090] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0091] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0092] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0093] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0094] As an example, the box body may 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 a closed space is formed inside the box body to accommodate the battery cell assembly.

[0095] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0096] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0097] The energy storage device mentioned in the embodiment of the present application may include one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0098] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it at the appropriate time. For example, energy storage devices can store electrical energy when electricity consumption is low, and provide electrical energy to relevant users or electrical equipment during peak electricity consumption.

[0099] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0100] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0101] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0102] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0103] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes modules such as the slave battery management unit SBMU (SBMU) and the fusion switch.

[0104] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes modules such as an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module.

[0105] As an example, the fire protection module includes a control panel, a detector, an alarm device, etc., which are used to detect, alarm or extinguish fire in the energy storage device.

[0106] As an example, the power distribution module can be used to distribute power to the power consumption modules of the energy storage device.

[0107] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools and vehicles, etc.

[0108] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. Among them, the cooling system of the battery device can cool the cells and modules in the battery pack. Therefore, the design of the cooling system is crucial to improving the reliability and service life of the battery.

[0109] In the related art, the cooling system used in the battery device is mostly a water cooling system. In the water cooling system, a heat exchanger and a connecting hose are usually required, and a flowing coolant is set in the heat exchanger and the connecting hose to achieve heat exchange of the battery device, thereby reducing the temperature of the battery device. However, due to factors such as short circuit, excessive charge and discharge, or high temperature environment, the battery device may cause thermal runaway of the battery cell. When the battery cell thermal runaway occurs, the battery cell will generate high temperature and expand and deform, so that the distance between the battery cell and the connecting hose is gradually reduced, and finally the high-temperature battery cell is in direct contact with the outer peripheral surface of the connecting hose. The connecting hose is damaged by the high temperature, causing the coolant in the connecting hose to leak, thereby reducing the service life of the connecting hose and affecting the cooling effect of the cooling system, thereby reducing the reliability of the battery device.

[0110] Based on the above considerations, in order to improve the reliability of the battery device, the present application designs a battery device, in which a heat exchange assembly is provided, the heat exchange assembly includes a heat exchanger and a connecting tube, the protrusion structure is provided on the outer peripheral surface of the connecting tube, and in the second direction, the distance between the protrusion structure and the battery cell is smaller than the distance between the outer peripheral surface of the connecting tube and the battery cell. Therefore, when the battery cell expands and deforms due to thermal runaway, the protrusion structure on the outer peripheral surface of the connecting tube can directly contact the high-temperature battery cell, thereby effectively reducing the possibility of contact between the outer peripheral surface of the connecting tube and the high-temperature battery cell, and further effectively reducing the possibility of damage to the connecting tube due to the high temperature of the battery cell, thereby effectively protecting the connecting tube, so that the heat exchange assembly can work normally, and further effectively improving the reliability of the battery device.

[0111] The embodiment of the present application provides an electric device using the battery device of the present disclosure as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console and an electric car toy, etc.

[0112] For the convenience of explanation, the following embodiments take the electric device 1 as a vehicle as an example, and describe in detail the structures of the battery device 100, the electric device 1 and the energy storage device of the present application.

[0113] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 100, and the battery device 100 may be arranged at the bottom, head or tail of the vehicle. The battery device 100 may be used for powering the vehicle, for example, the battery device 100 may be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle. Working power requirements. In some embodiments of the present application, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0114] Please refer to Figure 2 , Figure 2 is a schematic structural diagram of a battery device 100 according to an embodiment of the present application; Figure 3 is a schematic structural diagram of a connecting pipe 22 according to some embodiments of the present application; Figure 4 is a schematic structural diagram of a connecting pipe 22 according to other embodiments of the present application; Figure 5is an exploded view of the connecting pipe 22 according to some embodiments of the present application; Figure 6 is an exploded view of the connecting pipe 22 according to other embodiments of the present application; Figure 7 is a schematic structural diagram of a second tendon layer 32 according to some embodiments of the present application; Figure 8 is a schematic structural diagram of a second tendon layer 32 according to other embodiments of the present application; Fig. 9 is a schematic structural diagram of a structural layer 223 of a connecting pipe 22 according to some embodiments of the present application; Fig.10 is a schematic structural diagram of a structural layer 223 of a connecting pipe 22 according to other embodiments of the present application; Fig.11 is a schematic structural diagram of a structural layer 223 of a connecting pipe 22 according to some embodiments of the present application; Fig.12 is a schematic structural diagram of a connecting pipe 22 according to some embodiments of the present application; Fig.13 is a schematic structural diagram of a connecting pipe 22 according to other embodiments of the present application; Fig.14 2 is a schematic diagram of the structure of the connecting portion 211 according to an embodiment of the present application.

[0115] Reference below Figure 2-Figure 14 A battery device 100 according to an embodiment of the first aspect of the present application is described.

[0116] The present application embodiment provides a battery device 100, such as Figure 2-Figure 6 As shown, the battery device 100 includes: a heat exchange component 20 , a protrusion structure 30 and a plurality of battery cells 10 .

[0117] The heat exchange assembly 20 includes a heat exchange element 21 and a connecting pipe 22. A heat exchange flow channel is formed in the heat exchange element 21. There are multiple heat exchange elements 21, which are arranged at intervals along the first direction X. The battery cell 10 is arranged between two adjacent heat exchange elements 21. The connecting pipe 22 is arranged on at least one side of the multiple battery cells 10 in the second direction Y and is connected between two adjacent heat exchange elements 21. The second direction Y intersects with the first direction X. The protruding structure 30 is provided on the outer peripheral surface of the connecting pipe 22. In the second direction Y, the distance between the protruding structure 30 and the battery cell 10 is smaller than the distance between the outer peripheral surface of the connecting pipe 22 and the battery cell 10. The protruding structure 30 includes a first rib layer 31 and a second rib layer 32 arranged along the radial direction of the connecting pipe 22. The second rib layer 32 is connected to the connecting pipe 22 through the first rib layer 31. The second rib layer 32 is a heat-insulating material.

[0118] The first direction X intersects the second direction Y, which means that the first direction X is not parallel to the second direction Y, and the first direction X and the second direction Y are arranged at an angle. For example, the angle between the first direction X and the second direction Y may be 30°, 45°, 60°, 80°, or 90°, etc. In some specific examples, the first direction X and the second direction Y are perpendicular to each other.

[0119] In some specific examples, such as Figure 2 As shown, the first direction X is the width direction of the battery device 100, the second direction Y is the length direction of the battery device 100, and the first direction X and the second direction Y are perpendicular to each other. The battery device 100 is provided with a plurality of battery cells 10, and the plurality of battery cells 10 are connected in series or in parallel to form a complete battery module, thereby realizing the storage and transportation of electric energy.

[0120] For example, the number of battery cells 10 may be fifteen, twenty, twenty-five, thirty, or more than thirty-five. Figure 2 As shown, the number of battery cells 10 is eighteen. Furthermore, in the first direction X, the number of rows of battery cells 10 is three, and in the second direction Y, the number of columns of battery cells 10 is six, and a plurality of battery cells 10 are arranged at intervals in the battery device 100. In other words, a plurality of rows of battery cells 10 are arranged at intervals, and a plurality of battery cells 10 in each row of battery cells 10 are arranged at intervals, or in other words, a plurality of columns of battery cells 10 are arranged at intervals, and a plurality of battery cells 10 in each column of battery cells 10 are arranged at intervals.

[0121] The battery device 100 is provided with a plurality of heat exchange elements 21, and heat exchange channels are formed in the heat exchange elements 21. For example, the number of the heat exchange elements 21 may be six, seven, eight, nine, or more than ten. In some specific examples, such as Figure 2 As shown, the number of heat exchangers 21 is seven, and the plurality of heat exchangers 21 are extended along the second direction Y, and the plurality of heat exchangers 21 are arranged at intervals along the first direction X, and each column of battery cells 10 is arranged between two adjacent heat exchangers 21. In other words, both side surfaces of each battery cell 10 in the first direction X are in contact with the heat exchanger, so that the contact area between the battery cell 10 and the heat exchanger 21 can be effectively increased, thereby effectively improving the heat exchange efficiency between the battery cell 10 and the heat exchanger 21.

[0122] For example, the connecting tube 22 is arranged on any one side of the plurality of battery cells 10 in the second direction Y; for another example, the connecting tube 22 is arranged on both sides of the plurality of battery cells 10 in the second direction Y. In some specific examples, such as Figure 2 As shown, the connecting pipe 22 is arranged on both sides of the plurality of battery cells 10 in the second direction Y and extends along the first direction X, and is connected between two adjacent heat exchange members 21. Figure 2 As shown, the heat exchange component 20 is further provided with an inlet pipe section 23 and an outlet pipe section 24 .

[0123] When the battery device 100 is operating normally, the coolant can flow into the multiple connecting tubes 22 arranged on one side of the multiple battery cells 10 in the second direction Y through the inlet pipe section 23. Then, the coolant flows into the multiple heat exchange elements 21 arranged at intervals in the first direction X, and exchanges heat with the multiple battery cells 10. After the heat exchange, the coolant flows to the multiple connecting tubes 22 arranged on the other side of the multiple battery cells 10 in the second direction Y, and finally the coolant flows out through the outlet pipe section 24.

[0124] Thus, the coolant can circulate smoothly in the heat exchange assembly 20 and efficiently exchange heat with the multiple battery cells 10 to reduce the temperature of the battery cells 10. Furthermore, the coolant is an ethylene glycol solution, which has good thermal conductivity and can remain liquid at a relatively low temperature, effectively avoiding freezing, thereby effectively protecting the pipelines and equipment from damage.

[0125] In some specific examples, such as Figure 2 As shown, the battery device 100 is also provided with a box body, which includes a box body 41 and a cover body. The box body 41 is a rectangular parallelepiped with an open top, the cover body covers the top of the box body 41, and the periphery of the cover body is fastened to the periphery of the box body 41 by fasteners.

[0126] In some specific examples, such as Figure 3 and Figure 4 As shown, the protruding structure 30 is disposed on the outer circumference of the connecting tube 22, that is, one end of the protruding structure 30 is connected to the outer circumference of the connecting tube 22, and the other end of the protruding structure 30 protrudes from the inside to the outside along the radial direction of the connecting tube 22. Figure 2 As shown, in the second direction Y, the distance L1 between the end of the protrusion structure 30 away from the connecting tube 22 and the side surface of the battery cell 10 facing the connecting tube 22 is smaller than the distance L2 between the outer peripheral surface of the connecting tube 22 and the side surface of the battery cell 10 facing the connecting tube 22 .

[0127] Furthermore, in some specific examples, such as Figure 5 and Figure 6 As shown, the protrusion structure 30 is provided with a first rib layer 31 and a second rib layer 32 arranged along the radial direction of the connecting tube 22. The first rib layer 31 is arranged on the outer peripheral surface of the connecting tube 22, and the second rib layer 32 is arranged on the outer side of the first rib layer 31 in the radial direction of the connecting tube 22.

[0128] That is to say, the second rib layer 32 is connected to the connecting tube 22 through the first rib layer 31, and the first rib layer 31 and the second rib layer 32 together form a double-layer protective structure. The second rib layer 32 can directly contact the expanded and deformed battery cell 10, and the second rib layer 32 is a heat-insulating material. Therefore, the second rib layer 32 can significantly reduce the heat transferred from the high-temperature battery cell 10 to the first rib layer 31, thereby effectively reducing the heat transferred from the first rib layer 31 to the connecting tube 22, thereby effectively protecting the connecting tube 22.

[0129] In addition, the first rib layer 31 can provide reliable support for the second rib layer 32 and isolate the second rib layer 32 from the connecting tube 22, thereby effectively reducing the possibility of direct contact between the second rib layer 32 and the outer peripheral surface of the connecting tube 22, further reducing the heat transferred to the connecting tube 22, thereby further improving the reliability of the connecting tube 22.

[0130] When the battery cell 10 undergoes thermal runaway and expands and deforms along the second direction Y toward the connecting tube 22, the second rib layer 32 of the protruding structure 30 disposed on the outer peripheral surface of the connecting tube 22 can provide a physical barrier for the connecting tube 22. After the high-temperature battery cell 10 expands and deforms, it directly contacts the outer end of the second rib layer 32 of the protruding structure 30 in the radial direction of the connecting tube 22, thereby effectively limiting the further expansion and deformation of the battery cell 10, thereby effectively reducing the possibility of direct contact between the battery cell 10 and the outer peripheral surface of the connecting tube 22, thereby effectively protecting the connecting tube 22 and reducing the possibility of leakage of the connecting tube 22 due to the high temperature of the expanded and deformed battery cell 10, so that the heat exchange assembly 20 can work normally, thereby effectively improving the reliability of the battery device 100.

[0131] In the above technical solution, by arranging the protruding structure 30 on the outer peripheral surface of the connecting tube 22, in the second direction Y, the distance between the protruding structure 30 and the battery cell 10 is smaller than the distance between the outer peripheral surface of the connecting tube 22 and the battery cell 10, and the protruding structure 30 includes a first rib layer 31 and a second rib layer 32 arranged along the radial direction of the connecting tube 22, and the second rib layer 32 is connected to the connecting tube 22 through the first rib layer 31. The second rib layer 32 is a heat-insulating material member, which can reduce the possibility of direct contact between the battery cell 10 and the outer peripheral surface of the connecting tube 22 when the battery cell 10 expands and deforms due to thermal runaway, thereby effectively protecting the connecting tube 22, and further improving the reliability of the battery device 100.

[0132] It should be noted that the spacing L1 between the protruding structure 30 and the battery cell 10 and the spacing L2 between the outer circumference of the connecting tube 22 and the battery cell 10 can be measured by measuring tools such as a coordinate measuring machine, a vernier caliper and a micrometer. The following describes the method for measuring the spacing L1 between the protruding structure 30 and the battery cell 10 and the spacing L2 between the outer circumference of the connecting tube 22 and the battery cell 10, taking a coordinate measuring machine as an example. First, the data points on the workpiece surface are obtained by using the probe contact or laser scanning of the coordinate measuring machine, and then the geometric parameters such as the distance are calculated based on the data points.

[0133] In some embodiments of the present application, Figure 3 and Figure 4 As shown, the protruding structure 30 is a heat-insulating material.

[0134] When the battery cell 10 expands and deforms due to thermal runaway and contacts the protrusion structure 30, since the protrusion structure 30 is a heat-insulating material, the protrusion structure 30 can significantly reduce the heat transferred from the high-temperature battery cell 10 to the connecting tube 22, thereby effectively reducing the possibility of the connecting tube 22 being damaged due to excessive temperature, thereby effectively improving the durability and reliability of the connecting tube 22. Furthermore, the heat-insulating material can be a composite material such as PA-GF (nylon-glass fiber), PPA-GF (high-temperature resistant nylon-glass fiber) and PPS-GF (polyphenylene sulfide-glass fiber) or PEEK (special engineering plastic).

[0135] In the above technical solution, by setting the protrusion structure 30 as a heat-insulating material, the heat transferred to the connecting pipe 22 can be significantly reduced, thereby effectively reducing the possibility of the connecting pipe 22 being damaged due to excessive temperature, thereby effectively improving the service life and reliability of the connecting pipe 22.

[0136] In some embodiments of the present application, Figure 3 and Figure 4 As shown, the heat-resistant temperature of the protrusion structure 30 is greater than or equal to 300°C.

[0137] For example, the heat-resistant temperature of the protruding structure 30 may be 300°C, 400°C, 500°C, 600°C, and 700°C or above. In some specific examples, the heat-resistant temperature of the protruding structure 30 is 300°C. When the battery cell 10 is in thermal runaway and contacts the protruding structure 30 and the temperature of the battery cell 10 is less than or equal to 300°C, the protruding structure 30 can maintain the original physical and chemical properties unchanged, that is, the protruding structure 30 can maintain the integrity of the structure and the effectiveness of the high temperature resistance function. In addition, the protruding structure 30 can also effectively reduce the risk of material degradation caused by high temperature.

[0138] In the above technical solution, by setting the heat resistance temperature of the protrusion structure 30 to be greater than or equal to 300°C, the stability and reliability of the physical and chemical properties of the protrusion structure 30 can be effectively improved, thereby effectively improving the high temperature resistance of the protrusion structure 30, and further effectively improving the heat insulation effect of the protrusion structure 30.

[0139] In some embodiments of the present application, Figure 3 and Figure 4 As shown, the protrusion structure 30 extends along the circumference of the connecting pipe 22 in an arc shape or a ring shape.

[0140] For example, the protrusion structure 30 extends in an arc shape along the circumference of the connecting tube 22, and the arc-shaped protrusion structure 30 is located between the battery cell 10 and the connecting tube 22; or in another example, the protrusion structure 30 extends in an annular shape along the circumference of the connecting tube 22. In this way, the protrusion structure 30 can surround the connecting tube 22, thereby providing more comprehensive physical isolation for the connecting tube 22.

[0141] In some specific examples, such as Figure 3 and Figure 4 As shown, the protrusion structure 30 extends in a ring shape along the circumference of the connecting tube 22. When the battery cell 10 undergoes thermal runaway and expands and deforms toward the connecting tube 22, the arc-shaped or ring-shaped protrusion structure 30 can provide comprehensive isolation and protection for the connecting tube 22, thereby effectively reducing the risk of damage to the connecting tube 22 caused by direct contact between the battery cell 10 and the outer circumference of the connecting tube 22.

[0142] In addition, the arc-shaped or annular protrusion structure 30 can evenly distribute the heat from the battery cell 10, so that the protrusion structure 30 can disperse the heat faster, thereby effectively reducing the risk of local overheating of the protrusion structure 30, thereby effectively protecting the protrusion structure 30 and improving the durability of the protrusion structure 30.

[0143] In the above technical solution, by extending the protruding structure 30 into an arc or a ring along the circumference of the connecting pipe 22, not only can the protection range of the protruding structure 30 on the connecting pipe 22 be effectively increased, but also the heat dissipation efficiency of the protruding structure 30 can be effectively improved, and the risk of local overheating of the protruding structure 30 can be reduced, thereby effectively improving the durability of the protruding structure 30.

[0144] In some embodiments of the present application, the first rib layer 31 and the connecting pipe 22 are integrally formed; and / or the second rib layer 32 and the first rib layer 31 are integrally connected by injection molding.

[0145] For example, the first rib layer 31 and the connecting tube 22 are integrally formed; in another example, the second rib layer 32 and the first rib layer 31 are connected as a whole by injection molding; in another example, the first rib layer 31 and the connecting tube 22 are integrally formed, and the second rib layer 32 and the first rib layer 31 are connected as a whole by injection molding.

[0146] When the first rib layer 31 and the connecting tube 22 are integrally formed, the structural strength of the connection between the first rib layer 31 and the connecting tube 22 can be significantly improved, so that the protruding structure 30 can better withstand the extrusion caused by the expansion and deformation of the high-temperature battery cell 10, and reduce the possibility of damage to the connection between the first rib layer 31 and the connecting tube 22. In addition, the integral molding technology can simplify the production process and reduce the assembly steps, thereby effectively reducing production costs and improving production efficiency.

[0147] When the second rib layer 32 and the first rib layer 31 are connected as one through the injection molding process, not only the second rib layer 32 and the first rib layer 31 are tightly fitted to form an integral structure, thereby effectively increasing the mechanical strength of the raised structure 30, but also the second rib layer 32 can exert the best thermal insulation effect, thereby effectively improving the thermal insulation performance of the raised structure 30.

[0148] In the above technical solution, the first rib layer 31 and the connecting tube 22 are integrally formed, which can not only effectively improve the structural strength of the connection between the first rib layer 31 and the connecting tube 22, but also simplify the production process and reduce the assembly steps, thereby effectively reducing the production cost and improving the production efficiency; the second rib layer 32 and the first rib layer 31 are connected as one by injection molding, which can not only effectively increase the mechanical strength of the raised structure 30, but also effectively improve the thermal insulation performance of the raised structure 30.

[0149] In some embodiments of the present application, Figure 7-10 As shown, a fixing groove is formed on one of the first rib layer 31 and the second rib layer 32 , and a portion of the other of the first rib layer 31 and the second rib layer 32 fits into the fixing groove so that the first rib layer 31 is fixedly connected to the second rib layer 32 .

[0150] For example, a fixing groove is formed on the second rib layer 32, and a portion of the first rib layer 31 fits in the fixing groove; for another example, a fixing groove is formed on the first rib layer 31, and a portion of the second rib layer 32 fits in the fixing groove. Figure 7 and Fig. 9 As shown, a second fixing groove 321 is formed on the second rib layer 32, and a portion of the first rib layer 31 fits in the second fixing groove 321. In other specific examples, such as Figure 8 and Fig.10 As shown, a first fixing groove 311 is formed on the first rib layer 31 , and a portion of the second rib layer 32 is fitted into the first fixing groove 311 .

[0151] In the above technical solution, by setting a fixing groove on one of the first rib layer 31 and the second rib layer 32, and fitting a part of the other one of the first rib layer 31 and the second rib layer 32 into the fixing groove so that the first rib layer 31 and the second rib layer 32 are fixedly connected, the structural construction of the protruding structure 30 can be effectively simplified, and the assembly process of the protruding structure 30 can be effectively simplified, thereby effectively reducing the cost.

[0152] In some embodiments of the present application, Figure 7-10 As shown, the fixing groove extends along the circumference of the connecting pipe 22 in an arc shape or an annular shape.

[0153] For example, the fixing groove extends in a ring shape along the circumference of the connecting tube 22; in another example, the fixing groove extends in an arc shape along the circumference of the connecting tube 22. Figure 7 and Fig. 9 As shown, a second fixing groove 321 is formed on the second rib layer 32, and the second fixing groove 321 extends in a ring shape along the circumference of the connecting pipe 22. In other specific examples, such as Figure 8 and Fig.10 As shown, a first fixing groove 311 is formed on the first rib layer 31, and the first fixing groove 311 extends in an arc shape along the circumference of the connecting tube 22. Furthermore, the number of first fixing grooves 311 formed on the first rib layer 31 is four, and the sizes of the multiple first fixing grooves 311 are consistent and are arranged at intervals in the circumferential direction of the connecting tube 22.

[0154] In the above technical solution, by extending the fixing groove into an arc or a ring shape along the circumference of the connecting tube 22, the fixing groove can be evenly distributed in the circumferential direction of the connecting tube 22, thereby effectively improving the stability of the connection between the first rib layer 31 and the second rib layer 32, and can effectively disperse the stress between the first rib layer 31 and the second rib layer 32, reduce local stress concentration, and effectively improve the durability of the protruding structure 30.

[0155] In some embodiments of the present application, Figure 7-10 As shown, a first limiting portion 312 is formed on the first rib layer 31, and a second limiting portion 322 is formed on the second rib layer 32. The first limiting portion 312 cooperates with the second limiting portion 322 to limit the relative movement of the first rib layer 31 and the second rib layer 32 in the circumferential direction of the connecting tube 22.

[0156] In some specific examples, the first rib layer 31 is integrally formed with the connecting tube 22, that is, the first rib layer 31 is fixed on the outer peripheral surface of the connecting tube 22, and because the second rib layer 32 is limitedly matched with the first rib layer 31, when the battery cell 10 expands and deforms due to thermal runaway and contacts the second rib layer 32, the limiting cooperation between the first limiting portion 312 and the second limiting portion 322 can effectively limit the rotation of the second rib layer 32 relative to the connecting tube 22.

[0157] In the above technical solution, through the limiting cooperation between the first limiting portion 312 and the second limiting portion 322, the relative movement of the first rib layer 31 and the second rib layer 32 in the circumferential direction of the connecting tube 22 can be effectively limited, thereby effectively limiting the rotation of the protruding structure 30 relative to the connecting tube 22, thereby effectively improving the stability of the protruding structure 30.

[0158] In some embodiments of the present application, Figure 7-10 As shown, one of the first limiting portion 312 and the second limiting portion 322 is formed as a limiting protrusion and the other is formed as a limiting groove, and the limiting protrusion is matched in the limiting groove.

[0159] For example, the first limiting portion 312 is formed as a limiting protrusion, and the second limiting portion 322 is formed with a limiting groove; for another example, the second limiting portion 322 is formed as a limiting protrusion, and the first limiting portion 312 is formed with a limiting groove. Fig. 9 As shown, the first limiting portion 312 is formed as a limiting protrusion, and a limiting groove is formed on the second limiting portion 322. The limiting protrusion is connected to the outer peripheral surface of the first rib layer 31 and the limiting protrusion is extended along the axial direction of the connecting tube 22. Furthermore, the limiting protrusion is integrally formed with the first rib layer 31.

[0160] In other specific examples, such as Figure 8 and Fig.10 As shown, the first limiting portion 312 is formed as a limiting protrusion, and a limiting groove is formed on the second limiting portion 322. The limiting protrusion is connected to the outer peripheral surface of the connecting tube 22 and the limiting protrusion is extended along the axial direction of the connecting tube 22. Further, both ends of the limiting protrusion in the axial direction of the connecting tube 22 are connected to the first rib layer 31, and the limiting protrusion is integrally formed with the first rib layer 31. The limiting cooperation between the limiting protrusion and the limiting groove can effectively limit the second rib layer 32 from rotating relative to the connecting tube 22.

[0161] In the above technical solution, by setting a limiting protrusion on one of the first limiting portion 312 and the second limiting portion 322 and setting a limiting groove on the other, the limiting protrusion cooperates in the limiting groove, which can effectively simplify the structural structure of the first limiting portion 312 and the second limiting portion 322, thereby effectively simplifying the processing steps of the protrusion structure 30, and then effectively improving the processing efficiency of the protrusion structure 30.

[0162] In some embodiments of the present application, Figure 7-10 As shown, there are multiple first limiting portions 312 , which are arranged at intervals along the circumference of the connecting pipe 22 , and there are multiple second limiting portions 322 , which correspond one-to-one to the first limiting portions 312 .

[0163] For example, the number of the first limiting portions 312 may be two, three, four, five, or more than six. Fig. 9 As shown, the first limiting portion 312 is formed as a limiting protrusion, and a limiting groove is formed on the second limiting portion 322. The number of the limiting protrusions is two, and the plurality of limiting protrusions are arranged at intervals along the circumference of the connecting tube 22. The number of the limiting grooves is two and corresponds to the limiting protrusions one by one. Further, the inner circumferential surface of the second rib layer 32 is concave from inside to outside along the radial direction of the connecting tube 22 to form a limiting groove.

[0164] In other specific examples, such as Figure 8 and Fig.10 As shown, the first limiting portion 312 is formed as a limiting protrusion, and the second limiting portion 322 is formed with a limiting groove. The number of the limiting protrusions is four, and the plurality of limiting protrusions are arranged at intervals along the circumference of the connecting pipe 22. The number of the limiting grooves is two and corresponds to the limiting protrusions one by one. Figure 8 As shown, the inner circumferential surface of the second rib layer 32 is recessed from inside to outside along the radial direction of the connecting pipe 22 to form a limiting groove.

[0165] In the above technical solution, multiple first limiting portions 312 are arranged at intervals along the circumference of the connecting tube 22, and the number of second limiting portions 322 is multiple and corresponds one-to-one with the first limiting portions 312, which can effectively disperse the force between the first limiting portions 312 and the second limiting portions 322 along the circumferential direction of the connecting tube 22, thereby effectively reducing the risk of structural damage due to stress concentration, and further effectively improving the stability and reliability of the protruding structure 30.

[0166] In some embodiments of the present application, Figure 7 and Fig. 9 As shown, the fixing groove is formed on the second rib layer 32 and opens inwardly along the radial direction of the connecting tube 22 , and the outer end of the first rib layer 31 in the radial direction of the connecting tube 22 fits into the fixing groove.

[0167] In some specific examples, such as Figure 7 As shown, the inner circumferential surface of the second rib layer 32 is recessed from inside to outside along the radial direction of the connecting tube 22 to form a second fixing groove 321, and the second fixing groove 321 extends in a ring shape along the circumferential direction of the connecting tube 22. Fig. 9 As shown, the outer end of the first rib layer 31 in the radial direction of the connecting tube 22 is fitted into the second fixing groove 321 , thereby effectively limiting the movement of the second rib layer 32 in the axial direction of the connecting tube 22 .

[0168] In the above technical solution, by forming a fixing groove on the second rib layer 32 and opening it radially inward along the connecting tube 22, the outer end of the first rib layer 31 in the radial direction of the connecting tube 22 is fitted into the fixing groove, which can effectively limit the movement of the second rib layer 32 in the axial direction of the connecting tube 22, thereby effectively improving the stability of the protruding structure 30.

[0169] In some embodiments of the present application, Fig.11 and Fig.12 As shown, in the axial direction of the connecting tube 22, the ratio of the width of the first rib layer 31 to the width of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.8; and / or, in the radial direction of the connecting tube 22, the ratio of the height of the first rib layer 31 to the height of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.5.

[0170] For example, in the axial direction of the connecting tube 22, the ratio of the width B1 of the first rib layer 31 to the width B2 of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.8; for another example, in the radial direction of the connecting tube 22, the ratio of the height H1 of the first rib layer 31 to the height H2 of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.5; for another example, in the axial direction of the connecting tube 22, the ratio of the width B1 of the first rib layer 31 to the width B2 of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.8, and in the radial direction of the connecting tube 22, the ratio of the height H1 of the first rib layer 31 to the height H2 of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.5.

[0171] For example Fig.11 and Fig.12 As shown, the ratio of the width B1 of the first rib layer 31 to the width B2 of the protruding structure 30 may be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8, and the ratio of the height H1 of the first rib layer 31 to the height H2 of the protruding structure 30 may be 0.2, 0.3, 0.4 and 0.5.

[0172] In the above technical solution, by setting the ratio of the width of the first rib layer 31 to the width of the protruding structure 30 to be greater than or equal to 0.2 and less than or equal to 0.8, and / or setting the ratio of the height of the first rib layer 31 to the height of the protruding structure 30 to be greater than or equal to 0.2 and less than or equal to 0.5, the size ratio of the first rib layer 31 and the second rib layer 32 can be optimized, thereby effectively improving the rationality of the force applied to the protruding structure 30, and further effectively improving the mechanical properties of the protruding structure 30.

[0173] It should be noted that the width B1 of the first rib layer 31, the width B2 of the protruding structure 30, the height H1 of the first rib layer 31, and the height H2 of the protruding structure 30 can be measured by measuring tools such as a coordinate measuring machine, a vernier caliper, and a micrometer. The following describes a method for measuring the width B1 of the first rib layer 31, the width B2 of the protruding structure 30, the height H1 of the first rib layer 31, and the height H2 of the protruding structure 30 using a coordinate measuring machine as an example. First, data points on the surface of the workpiece are obtained by using a probe contact or laser scanning method of a coordinate measuring machine, and then geometric parameters such as width and height are calculated based on the data points.

[0174] In some embodiments of the present application, Figure 8 and Fig.10 As shown, the fixing groove is formed on the first rib layer 31 and opens outwardly in the radial direction of the connecting pipe 22 , and the inner end of the second rib layer 32 in the radial direction of the connecting pipe 22 fits in the fixing groove.

[0175] In some specific examples, such as Fig.10 As shown, the outer circumferential surface of the first rib layer 31 is concave from outside to inside along the radial direction of the connecting tube 22 to form a first fixing groove 311, and the first fixing groove 311 extends in an arc shape along the circumference of the connecting tube 22. Further, the number of the first fixing grooves 311 is four, and the plurality of first fixing grooves 311 are arranged at intervals on the circumference of the connecting tube 22. For example Figure 8 As shown, the inner end of the second rib layer 32 in the radial direction of the connecting tube 22 is fitted into the first fixing groove 311 , thereby effectively limiting the movement of the second rib layer 32 in the axial direction of the connecting tube 22 .

[0176] In the above technical solution, by forming a fixing groove on the first rib layer 31 and opening it radially outward along the connecting tube 22, the inner end of the second rib layer 32 in the radial direction of the connecting tube 22 is fitted into the fixing groove, which can effectively limit the movement of the second rib layer 32 in the axial direction of the connecting tube 22, thereby effectively improving the stability of the protruding structure 30.

[0177] In some embodiments of the present application, Fig.13 As shown, in the radial direction of the connecting tube 22 , the height of the first rib layer 31 is greater than or equal to 0.3 mm and less than or equal to the distance between the side surface of the second rib layer 32 away from the connecting tube 22 and the outer peripheral surface of the connecting tube 22 .

[0178] For example, in the radial direction of the connecting tube 22, the height H3 of the first rib layer 31 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm and 0.7 mm, and the height H3 of the first rib layer 31 is less than or equal to the distance L3 between the side surface of the second rib layer 32 away from the connecting tube 22 and the outer peripheral surface of the connecting tube 22.

[0179] In the above technical solution, by setting the height of the first rib layer 31 to be greater than or equal to 0.3 mm and less than or equal to the distance between the surface of the side of the second rib layer 32 facing away from the connecting tube 22 and the outer peripheral surface of the connecting tube 22, not only can the first rib layer 31 have sufficient structural strength in the radial direction of the connecting tube 22, thereby effectively enhancing the structural stability of the first rib layer 31 in the radial direction of the connecting tube 22, but also the second rib layer 32 can be arranged on the outside of the first rib layer 31 in the radial direction of the connecting tube 22, thereby effectively reducing the risk of direct contact between the first rib layer 31 and the battery cell 10, thereby effectively protecting the first rib layer 31.

[0180] It should be noted that the height H3 of the first rib layer 31 and the distance L3 between the side surface of the second rib layer 32 away from the connecting tube 22 and the outer peripheral surface of the connecting tube 22 can be measured by measuring tools such as a coordinate measuring machine, a vernier caliper and a micrometer. The following describes the method for measuring the height H3 of the first rib layer 31 and the distance L3 between the side surface of the second rib layer 32 away from the connecting tube 22 and the outer peripheral surface of the connecting tube 22, taking a coordinate measuring machine as an example. First, the data points on the workpiece surface are obtained by using the probe contact or laser scanning of the coordinate measuring machine, and then the geometric parameters such as height and distance are calculated based on the data points.

[0181] In some embodiments of the present application, Fig.13 As shown, in the axial direction of the connecting pipe 22, the distance between the end surface of the first rib layer 31 and the adjacent side wall of the fixing groove is greater than or equal to 0.3 mm.

[0182] For example, in the axial direction of the connecting pipe 22, the distance L4 between the end surface of the first rib layer 31 and the adjacent side wall of the fixing groove may be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, and 0.7 mm.

[0183] In the above technical solution, by setting the spacing between the end face of the first rib layer 31 and the adjacent side wall of the fixing groove to be greater than or equal to 0.3 mm, the first rib layer 31 can have sufficient structural strength in the axial direction of the connecting tube 22, thereby effectively enhancing the structural stability of the first rib layer 31 in the axial direction of the connecting tube 22.

[0184] It should be noted that the spacing L4 between the end face of the first rib layer 31 and the adjacent side wall of the fixing groove can be measured by a coordinate measuring machine, a vernier caliper, a micrometer, or other measuring tools. The following describes a method for measuring the spacing L4 between the end face of the first rib layer 31 and the adjacent side wall of the fixing groove using a coordinate measuring machine as an example. First, data points on the workpiece surface are obtained by using a probe contact or laser scanning method of a coordinate measuring machine, and then geometric parameters such as distance are calculated based on the data points.

[0185] In some embodiments of the present application, Fig.12 As shown, in the radial direction of the connecting tube 22, the height of the protruding structure 30 is greater than or equal to 1 mm and less than or equal to 4 mm; and / or, in the axial direction of the connecting tube 22, the width of the protruding structure 30 is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0186] For example, in the radial direction of the connecting tube 22, the height H2 of the protruding structure 30 is greater than or equal to 1 mm and less than or equal to 4 mm; for another example, in the axial direction of the connecting tube 22, the width B2 of the protruding structure 30 is greater than or equal to 0.5 mm and less than or equal to 5 mm; for another example, in the radial direction of the connecting tube 22, the height H2 of the protruding structure 30 is greater than or equal to 1 mm and less than or equal to 4 mm, and in the axial direction of the connecting tube 22, the width B2 of the protruding structure 30 is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0187] For example Fig.12 As shown, in the radial direction of the connecting tube 22, the height H2 of the protruding structure 30 can be 1 mm, 2 mm, 3 mm and 4 mm, and in the axial direction of the connecting tube 22, the width B2 of the protruding structure 30 can be 0.5 mm, 1.5 mm, 2.5 mm, 3.5 mm, 4.5 mm and 5 mm.

[0188] In the above technical solution, by setting the height of the protrusion structure 30 to be greater than or equal to 1 mm and less than or equal to 4 mm, and / or setting the width of the protrusion structure 30 to be greater than or equal to 0.5 mm and less than or equal to 5 mm, the protrusion structure 30 can have sufficient strength and rigidity in the radial direction of the connecting tube 22 and / or the circumferential direction of the connecting tube 22, thereby effectively improving the reliability and durability of the protrusion structure 30.

[0189] In some embodiments of the present application, Fig.14 As shown, the heat exchange element 21 is provided with a connecting pipe portion 211 , which extends along the first direction X. One end of the connecting pipe portion 211 extends into the connecting pipe 22 and is plugged and connected to the connecting pipe 22 .

[0190] In some specific examples, such as Fig.14 As shown, the connecting pipe portion 211 is extended along the first direction X, one end of the connecting pipe portion 211 extends into the connecting pipe 22 and is plugged into the connecting pipe 22, and one end of the connecting pipe portion 211 is connected to a side surface of the heat exchange element 21 facing the connecting pipe portion 211, thereby, the connecting pipe 22 can be connected between two adjacent heat exchange elements 21.

[0191] In the above technical solution, one end of the connecting pipe 211 is inserted into the connecting pipe 22 and plugged into the connecting pipe 22, which can not only effectively improve the strength and stability of the connection between the heat exchanger 21 and the connecting pipe 22, thereby effectively improving the reliability of the connection, but also effectively simplify the connection method between the heat exchanger 21 and the connecting pipe 22, thereby effectively improving the assembly efficiency.

[0192] In some embodiments of the present application, in the first direction X, the distance between the connecting pipe portion 211 and the protruding structure 30 is greater than or equal to 1 mm.

[0193] For example, in the first direction X, the spacing between the connecting portion 211 and the protruding structure 30 may be 1 mm, 2 mm, 3 mm, 4 mm and 5 mm, that is, in the first direction X, there is a certain distance between the connecting portion 211 and the first rib layer 31 of the protruding structure 30, thereby effectively reducing the possibility of interference between the connecting portion 211 and the first rib layer 31 of the protruding structure 30.

[0194] In the above technical solution, the spacing between the connecting pipe portion 211 and the protruding structure 30 is set to be greater than or equal to 1 mm, which can effectively reduce the possibility of interference between the connecting pipe portion 211 and the first rib layer 31 of the protruding structure 30, thereby effectively reducing the risk of leakage at the connection between the connecting pipe portion 211 and the connecting tube 22, and further effectively improving the reliability of the connection between the connecting pipe portion 211 and the connecting tube 22.

[0195] It should be noted that the spacing between the connecting portion 211 and the protruding structure 30 can be measured by a measuring tool such as a coordinate measuring machine, a vernier caliper, and a micrometer. The following describes a method for measuring the spacing between the connecting portion 211 and the protruding structure 30 using a coordinate measuring machine as an example. First, data points on the workpiece surface are obtained by using a probe contact or laser scanning method of the coordinate measuring machine, and then geometric parameters such as the spacing are calculated based on the data points.

[0196] In some embodiments of the present application, Figure 3 and Figure 4 As shown, the connecting pipe 22 includes a main pipe section 221 and a guide section 222. The guide section 222 is connected to both ends of the main pipe section 221 in the first direction X. In the direction from the main pipe section 221 toward the guide section 222, the diameter of the guide section 222 gradually increases, and the protrusion structure 30 is arranged on the outer peripheral surface of the main pipe section 221.

[0197] When one end of the connecting pipe portion 211 is inserted into the connecting pipe 22 and plugged into the connecting pipe 22, since the diameter of the guide section 222 gradually increases in the direction from the main pipe section 221 toward the guide section 222, the guide section 222 can make it easier to insert the connecting pipe portion 211 into the connecting pipe 22, thereby effectively reducing the difficulty of plugging in and reducing the wear on the connecting pipe 22.

[0198] In the above technical solution, the guide section 222 is connected to both ends of the main pipe section 221 in the first direction X, and the diameter of the guide section 222 is set to gradually increase in the direction from the main pipe section 221 toward the guide section 222, which can not only effectively reduce the difficulty of assembly, thereby effectively improving the assembly efficiency, but also effectively reduce the wear on the connecting pipe 22 and reduce the risk of damage to the connecting pipe 22, thereby effectively increasing the service life of the connecting pipe 22.

[0199] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the connecting tube 22 includes a structural layer 223 and an elastic layer 224 which are stacked radially inward and outward of the connecting tube 22. The elastic layer 224 is arranged radially inward of the structural layer 223 and is injection molded as a whole with the structural layer 223. The elastic layer 224 is elastically deformable.

[0200] In some specific examples, the structural layer 223 is made of nylon material, which has high tensile strength and bending modulus, so that the structural layer 223 can withstand large forces without obvious deformation or breakage, thereby effectively improving the structural strength and rigidity of the connecting tube 22. In addition, the nylon material has excellent wear resistance and can resist wear during long-term use, thereby effectively extending the service life of the connecting tube 22.

[0201] In some specific examples, the elastic layer 224 is made of EPDM rubber, which has excellent elastic properties, thereby effectively improving the sealing of the connection between the connecting pipe 211 and the connecting pipe 22. In addition, EPDM rubber has good durability and chemical resistance, thereby effectively extending the service life of the connecting pipe 22.

[0202] In the above technical solution, a structural layer 223 and an elastic layer 224 are arranged in a radially inner and outer stacked manner in the connecting tube 22, and the elastic layer 224 is arranged on the radial inner side of the structural layer 223 and is injection molded as a whole with the structural layer 223. The elastic layer 224 can be elastically deformed, which can not only effectively improve the strength, rigidity and sealing of the connecting tube 22, but also effectively simplify the processing process of the connecting tube 22, thereby effectively improving the processing efficiency of the connecting tube 22.

[0203] Second, as Figure 1 As shown, an embodiment of the present application provides an electric device 1, which includes a battery device 100 according to the first aspect of the present application, and the battery device 100 is used to provide electric energy.

[0204] For example Figure 1As shown, the power-consuming device 1 may be a vehicle. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 100, and the battery device 100 may be provided at the bottom, head or tail of the vehicle. The battery device 100 may be used to power the vehicle, for example, the battery device 100 may be used as an operating power source for the vehicle.

[0205] The vehicle further includes a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for starting, navigating, and driving the vehicle. In some specific examples, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0206] In the above technical solution, by setting the battery device 100 of the first aspect in the electrical device 1, the protruding structure 30 of the battery device 100 is arranged on the outer peripheral surface of the connecting tube 22, and in the second direction Y, the distance between the protruding structure 30 and the battery cell 10 is smaller than the distance between the outer peripheral surface of the connecting tube 22 and the battery cell 10. When the battery cell 10 expands and deforms due to thermal runaway, the possibility of direct contact between the battery cell 10 and the outer peripheral surface of the connecting tube 22 can be reduced, thereby effectively protecting the connecting tube 22 and improving the reliability of the electrical device 1.

[0207] In a third aspect, an embodiment of the present application provides an energy storage device, which includes the battery device 100 according to the first aspect of the present application.

[0208] The energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 100, and the multiple battery devices 100 are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0209] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it at the appropriate time. For example, energy storage devices can store electrical energy when electricity consumption is low, and provide electrical energy to relevant users or electrical equipment during peak electricity consumption.

[0210] In the above technical solution, by setting the battery device 100 of the first aspect in the energy storage device, the protruding structure 30 of the battery device 100 is arranged on the outer peripheral surface of the connecting tube 22, and in the second direction Y, the distance between the protruding structure 30 and the battery cell 10 is smaller than the distance between the outer peripheral surface of the connecting tube 22 and the battery cell 10, which can reduce the possibility of direct contact between the battery cell 10 and the outer peripheral surface of the connecting tube 22 when the battery cell 10 undergoes thermal runaway and expands and deforms, thereby effectively protecting the connecting tube 22 and improving the reliability of the energy storage device.

[0211] The following will refer to Figure 2-Figure 14 The battery device 100 according to two specific embodiments of the present application is described.

[0212] like Figure 2-Figure 4 As shown, the battery device 100 includes a heat exchange assembly 20 , a protruding structure 30 , a box body and a plurality of battery cells 10 .

[0213] like Figure 2 As shown, the number of battery cells 10 is eighteen, the number of rows of battery cells 10 is three in the first direction X, the number of columns of battery cells 10 is six in the second direction Y, and a plurality of battery cells 10 are arranged at intervals in the battery device 100. In other words, a plurality of rows of battery cells 10 are arranged at intervals, and a plurality of battery cells 10 in each row of battery cells 10 are arranged at intervals, or in other words, a plurality of columns of battery cells 10 are arranged at intervals, and a plurality of battery cells 10 in each column of battery cells 10 are arranged at intervals.

[0214] like Figure 2 As shown, the box body includes a box body 41 and a cover body. The box body 41 is a rectangular parallelepiped with an open top. The cover body covers the top of the box body 41. The periphery of the cover body is fastened to the periphery of the box body 41 by fasteners.

[0215] like Figure 2 As shown, the heat exchange assembly 20 includes a heat exchange element 21 , a connecting pipe 22 , an inlet pipe section 23 and an outlet pipe section 24 .

[0216] like Figure 2As shown, seven heat exchange elements 21 are provided in the battery device 100, and a heat exchange flow channel is formed in each heat exchange element 21. Multiple heat exchange elements 21 are extended along the second direction Y, and multiple heat exchange elements 21 are arranged at intervals along the first direction X, and each column of battery cells 10 is arranged between two adjacent heat exchange elements 21. In other words, both side surfaces of each battery cell 10 in the first direction X are in contact with the heat exchanger. The connecting pipe 22 is arranged on both sides of the multiple battery cells 10 in the second direction Y and extends along the first direction X, and is connected between two adjacent heat exchange elements 21. The inlet pipe section 23 is arranged on one side of the multiple battery cells 10 in the second direction Y and extends along the first direction X, and the outlet pipe section 24 is arranged on the other side of the multiple battery cells 10 in the second direction Y and extends along the first direction X. Further, as Fig.14 As shown, the heat exchanger 21 is provided with a connecting pipe 211, which extends along the first direction X. One end of the connecting pipe 211 extends into the connecting pipe 22 and is plugged into the connecting pipe 22. One end of the connecting pipe 211 is connected to a side surface of the heat exchanger 21 facing the connecting pipe 211.

[0217] like Figure 3 and Figure 4 As shown, the connecting pipe 22 includes a main pipe section 221 and a guide section 222 which are arranged along the axial direction of the connecting pipe 22 .

[0218] like Figure 3 and Figure 4 As shown, the guide section 222 is connected to both ends of the main tube section 221 in the first direction X. In the direction from the main tube section 221 toward the guide section 222 , the diameter of the guide section 222 gradually increases. The protrusion structure 30 is provided on the outer peripheral surface of the main tube section 221 .

[0219] Furthermore, if Figure 2 As shown, in the second direction Y, the distance L1 between the end of the protrusion structure 30 away from the connecting tube 22 and the side surface of the battery cell 10 facing the connecting tube 22 is smaller than the distance L2 between the outer peripheral surface of the connecting tube 22 and the side surface of the battery cell 10 facing the connecting tube 22 .

[0220] like Figure 5 and Figure 6 As shown, the connecting tube 22 includes a structural layer 223 and an elastic layer 224 which are stacked radially inward and outward of the connecting tube 22. The elastic layer 224 is arranged radially inward of the structural layer 223 and is integrally molded with the structural layer 223 by injection molding. The elastic layer 224 is elastically deformable. Furthermore, the structural layer 223 is made of nylon, and the elastic layer 224 is made of EPDM rubber.

[0221] like Figure 5 and Figure 6As shown, the protruding structure 30 includes a first rib layer 31 and a second rib layer 32 arranged along the radial direction of the connecting pipe 22 .

[0222] like Figure 5 and Figure 6 As shown, the first rib layer 31 and the second rib layer 32 extend in a ring shape along the circumference of the connecting tube 22, the first rib layer 31 and the structural layer 223 of the connecting tube 22 are integrally formed, the second rib layer 32 and the first rib layer 31 are connected as a whole by injection molding, and the second rib layer 32 is arranged on the outside of the first rib layer 31 in the radial direction of the connecting tube 22. The second rib layer 32 is a heat-insulating material, and the heat-resistant temperature of the second rib layer 32 is greater than or equal to 300°C. In other words, the second rib layer 32 is connected to the connecting tube 22 through the first rib layer 31, and the first rib layer 31 and the second rib layer 32 together form a double-layer protective structure.

[0223] In one specific embodiment, Figure 7 and Fig. 9 As shown, the inner circumference of the second rib layer 32 is recessed from inside to outside along the radial direction of the connecting tube 22 to form a second fixing groove 321, and the second fixing groove 321 extends in a ring shape along the circumference of the connecting tube 22, and the outer end of the first rib layer 31 in the radial direction of the connecting tube 22 is fitted in the second fixing groove 321. Further, a first limiting portion 312 is formed on the first rib layer 31, and a second limiting portion 322 is formed on the second rib layer 32. The first limiting portion 312 is formed as a limiting protrusion, and a limiting groove is formed on the second limiting portion 322. The limiting protrusion is connected to the outer circumference of the first rib layer 31 and the limiting protrusion is extended along the axial direction of the connecting tube 22, and the limiting protrusion is integrally formed with the first rib layer 31.

[0224] There are two limiting protrusions, which are arranged at intervals along the circumference of the connecting tube 22, and two limiting grooves, which correspond to the limiting protrusions one by one. The limiting protrusions fit into the limiting grooves to limit the relative movement of the first rib layer 31 and the second rib layer 32 in the circumferential direction of the connecting tube 22.

[0225] like Fig.11 and Fig.12 As shown, in the axial direction of the connecting tube 22, the ratio of the width B1 of the first rib layer 31 to the width B2 of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.8, and in the radial direction of the connecting tube 22, the ratio of the height H1 of the first rib layer 31 to the height H2 of the protruding structure 30 is greater than or equal to 0.2 and less than or equal to 0.5.

[0226] In another specific embodiment, Figure 8 and Fig.10As shown, the outer peripheral surface of the first rib layer 31 is recessed from outside to inside along the radial direction of the connecting tube 22 to form a first fixing groove 311. The first fixing groove 311 extends in an arc shape along the circumference of the connecting tube 22. There are four first fixing grooves 311. The plurality of first fixing grooves 311 are arranged at intervals on the circumference of the connecting tube 22. The inner end of the second rib layer 32 in the radial direction of the connecting tube 22 fits in the first fixing groove 311.

[0227] Further, the first limiting portion 312 is formed as a limiting protrusion, and a limiting groove is formed on the second limiting portion 322. The limiting protrusion is connected to the outer peripheral surface of the connecting tube 22 and the limiting protrusion is extended along the axial direction of the connecting tube 22. Both ends of the limiting protrusion in the axial direction of the connecting tube 22 are connected to the first rib layer 31, and the limiting protrusion is integrally formed with the first rib layer 31. The number of limiting protrusions is four, and the plurality of limiting protrusions are arranged at intervals along the circumference of the connecting tube 22. The number of limiting grooves is two and corresponds to the limiting protrusions one by one. The limiting protrusion is matched in the limiting groove to limit the relative movement of the first rib layer 31 and the second rib layer 32 in the circumferential direction of the connecting tube 22.

[0228] like Fig.13 As shown, in the radial direction of the connecting tube 22, the height H3 of the first rib layer 31 is greater than or equal to 0.3 mm and less than or equal to the distance L3 between the surface of the second rib layer 32 on one side away from the connecting tube 22 and the outer peripheral surface of the connecting tube 22. In the axial direction of the connecting tube 22, the distance L4 between the end surface of the first rib layer 31 and the adjacent side wall of the fixing groove is greater than or equal to 0.3 mm.

[0229] For two specific embodiments of this application, Fig.12 As shown, in the radial direction of the connecting tube 22, the height H2 of the protruding structure 30 is greater than or equal to 1 mm and less than or equal to 4 mm, and in the axial direction of the connecting tube 22, the width B2 of the protruding structure 30 is greater than or equal to 0.5 mm and less than or equal to 5 mm. In addition, in the first direction X, the spacing between the connecting tube portion 211 and the protruding structure 30 is greater than or equal to 1 mm.

[0230] The battery device 100 can reduce the possibility of direct contact between the battery cell 10 and the outer peripheral surface of the connecting tube 22 when the battery cell 10 expands and deforms due to thermal runaway, thereby effectively protecting the connecting tube 22 and further improving the reliability of the battery device 100 .

[0231] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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 all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells (10); A heat exchange assembly (20), the heat exchange assembly (20) comprising a heat exchange element (21) and a connecting pipe (22), a heat exchange flow channel being formed in the heat exchange element (21), the heat exchange elements (21) being multiple in number and arranged at intervals along a first direction (X), the battery cells (10) being arranged between two adjacent heat exchange elements (21), the connecting pipe (22) being arranged on at least one side of the multiple battery cells (10) in a second direction (Y) and connected between two adjacent heat exchange elements (21), the second direction (Y) intersecting the first direction (X); a protruding structure (30), the protruding structure (30) being arranged on the outer peripheral surface of the connecting tube (22), and in the second direction (Y), the distance between the protruding structure (30) and the battery cell (10) being smaller than the distance between the outer peripheral surface of the connecting tube (22) and the battery cell (10), The protruding structure (30) comprises a first rib layer (31) and a second rib layer (32) arranged along the radial direction of the connecting tube (22); the second rib layer (32) is connected to the connecting tube (22) via the first rib layer (31); and the second rib layer (32) is made of a heat-insulating material.

2. The battery device according to claim 1, characterized in that: The protruding structure (30) is made of a heat-insulating material.

3. The battery device according to claim 1, characterized in that: The heat-resistant temperature of the protruding structure (30) is greater than or equal to 300°C.

4. The battery device according to claim 1, characterized in that: The protruding structure (30) extends in an arc shape or a ring shape along the circumference of the connecting pipe (22).

5. The battery device according to claim 1, characterized in that: The first rib layer (31) and the connecting pipe (22) are integrally formed; and / or the second rib layer (32) and the first rib layer (31) are integrally connected by injection molding.

6. The battery device according to claim 1, characterized in that: A fixing groove is formed on one of the first rib layer (31) and the second rib layer (32), and a portion of the other of the first rib layer (31) and the second rib layer (32) fits into the fixing groove so that the first rib layer (31) and the second rib layer (32) are fixedly connected.

7. The battery device according to claim 6, characterized in that: The fixing groove extends in an arc shape or an annular shape along the circumference of the connecting pipe (22).

8. The battery device according to claim 6, characterized in that: A first limiting portion (312) is formed on the first rib layer (31), and a second limiting portion (322) is formed on the second rib layer (32). The first limiting portion (312) and the second limiting portion (322) cooperate to limit relative movement of the first rib layer (31) and the second rib layer (32) in the circumferential direction of the connecting tube (22).

9. The battery device according to claim 8, characterized in that: One of the first limiting portion (312) and the second limiting portion (322) is formed as a limiting protrusion and the other is formed as a limiting groove, and the limiting protrusion is fitted into the limiting groove.

10. The battery device according to claim 8, characterized in that: There are a plurality of first limiting portions (312), and the plurality of first limiting portions (312) are arranged at intervals along the circumference of the connecting pipe (22); there are a plurality of second limiting portions (322) and they correspond one-to-one to the first limiting portions (312).

11. The battery device according to claim 6, characterized in that: The fixing groove is formed on the second rib layer (32) and opens inwardly along the radial direction of the connecting tube (22); the outer end of the first rib layer (31) in the radial direction of the connecting tube (22) fits into the fixing groove.

12. The battery device according to claim 11, characterized in that: In the axial direction of the connecting tube (22), the ratio of the width of the first rib layer (31) to the width of the protruding structure (30) is greater than or equal to 0.2 and less than or equal to 0.8; and / or, In the radial direction of the connecting tube (22), the ratio of the height of the first rib layer (31) to the height of the protruding structure (30) is greater than or equal to 0.2 and less than or equal to 0.

5.

13. The battery device according to claim 6, characterized in that: The fixing groove is formed on the first rib layer (31) and opens outwardly in the radial direction of the connecting tube (22); the inner end of the second rib layer (32) in the radial direction of the connecting tube (22) fits into the fixing groove.

14. The battery device according to claim 13, characterized in that: In the radial direction of the connecting tube (22), the height of the first rib layer (31) is greater than or equal to 0.3 mm and less than or equal to the distance between a surface of the second rib layer (32) facing away from the connecting tube (22) and the outer peripheral surface of the connecting tube (22).

15. The battery device according to claim 13, characterized in that: In the axial direction of the connecting pipe (22), the distance between the end surface of the first rib layer (31) and the adjacent side wall of the fixing groove is greater than or equal to 0.3 mm.

16. The battery device according to any one of claims 1 to 15, characterized in that: In the radial direction of the connecting tube (22), the height of the protruding structure (30) is greater than or equal to 1 mm and less than or equal to 4 mm; and / or in the axial direction of the connecting tube (22), the width of the protruding structure (30) is greater than or equal to 0.5 mm and less than or equal to 5 mm.

17. The battery device according to any one of claims 1 to 15, characterized in that: The heat exchange component (21) is provided with a connecting pipe portion (211), the connecting pipe portion (211) extending along a first direction (X), and one end of the connecting pipe portion (211) extending into the connecting pipe (22) to be plugged and connected to the connecting pipe (22).

18. The battery device according to claim 17, characterized in that: In the first direction (X), the distance between the connecting pipe portion (211) and the protruding structure (30) is greater than or equal to 1 mm.

19. The battery device according to claim 17, characterized in that: The connecting pipe (22) comprises a main pipe section (221) and a guide section (222); the guide section (222) is connected to two ends of the main pipe section (221) in the first direction (X); in a direction from the main pipe section (221) toward the guide section (222), the diameter of the guide section (222) gradually increases; and the protruding structure (30) is arranged on the outer peripheral surface of the main pipe section (221).

20. The battery device according to claim 1, characterized in that The connecting tube (22) comprises a structural layer (223) and an elastic layer (224) which are stacked radially inwardly and outwardly of the connecting tube (22); the elastic layer (224) is arranged radially inwardly of the structural layer (223) and is injection-molded as a whole with the structural layer (223); and the elastic layer (224) is elastically deformable.

21. An electrical device, characterized in that: It comprises a battery device (100) according to any one of claims 1 to 20, wherein the battery device (100) is used to provide electrical energy.

22. An energy storage device, characterized in that: Comprising a battery device (100) according to any one of claims 1-20.

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