Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises a box body, a battery assembly and a heat management assembly, the box body is enclosed to form a containing cavity, and the box body comprises a first box body part and a second box body part which are arranged along a first direction and are buckled with each other; the battery monomer assembly is arranged in the accommodating cavity and comprises a plurality of battery monomers; the heat management assembly comprises a first collecting pipe, a second collecting pipe and a plurality of heat exchange pieces, at least part of the heat exchange pieces are arranged between adjacent battery monomers, each heat exchange piece comprises a heat exchange main body and two collecting connecting parts, and the two collecting connecting parts are respectively communicated with the first collecting pipe and the second collecting pipe; at least part of the current collecting connecting parts extend along the first direction, the first current collecting pipe and the second current collecting pipe are respectively butted with the plurality of current collecting connecting parts along the first direction, and the first current collecting pipe and the second current collecting pipe are arranged on the same side of the battery monomer assembly. The battery device provided by the embodiment of the utility model is convenient to install, and the required space can be reduced.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery device and electrical equipment. Background Technology

[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] The development of battery technology must take into account multiple design factors. For example, improving the ease of installation of battery devices and reducing the space required for installation is an important research direction in the field of batteries. Utility Model Content

[0004] This application provides a battery device and electrical equipment that are easy to install and can reduce the required space.

[0005] In a first aspect, this application provides a battery device, including a housing, a battery cell assembly, and a thermal management assembly. The housing encloses a cavity and includes a first housing portion and a second housing portion arranged along a first direction and interlocked with each other. The battery cell assembly is disposed in the cavity and includes multiple battery cells. The thermal management assembly includes a first current collector, a second current collector, and multiple heat exchange components. At least some of the heat exchange components are disposed between adjacent battery cells. Each heat exchange component includes a connected heat exchange body and two current collector connection portions, which are respectively connected to the first current collector and the second current collector. At least some of the current collector connection portions extend along the first direction, and the first current collector and the second current collector are respectively connected to the multiple current collector connection portions along the first direction. The first current collector and the second current collector are disposed on the same side of the battery cell assembly.

[0006] In the technical solution of this application embodiment, the battery device includes a housing and battery cell assemblies and a thermal management assembly disposed within the housing. The housing comprises two parts arranged along a first direction to house the battery cells and the thermal management assembly. Furthermore, the heat exchange components in the thermal management assembly are connected to first and second manifolds along the first direction, allowing the thermal management assembly to be installed along this direction. This enables the thermal management assembly to be installed after the battery cell assemblies are installed in the housing, and the connection can be completed simply by applying force along the first direction, effectively reducing installation difficulty and improving installation efficiency. Simultaneously, the first and second manifolds for the inflow and outflow of cooling medium are located on the same side of the battery cell assemblies, reducing the space required for installing the thermal management assembly and thus increasing the energy density of the battery device.

[0007] According to some embodiments of this application, the current collection connection portions in multiple heat exchange components all extend along a first direction, and the first current collection pipe and the second current collection pipe extend at least partially parallel to each other and are arranged along the first direction. This further reduces the space required by the first and second current collection pipes on the side of the battery cell assembly.

[0008] According to some embodiments of this application, at least a portion of the heat exchanger includes multiple body sections and at least one connecting section. Along the extending direction of the heat exchanger, the connecting section connects the ends of two adjacent body sections. The multiple body sections extend parallel to each other, and a battery cell is sandwiched between adjacent body sections. Two current collector connecting sections are respectively disposed at opposite ends of the heat exchanger along its extending direction. This reduces the number of current collector connecting sections and the number of interfaces connecting to the first and second current collectors, improving reliability and reducing the number of required parts.

[0009] According to some embodiments of this application, each heat exchanger includes 2 to 5 body parts. This ensures smooth flow of the heat exchange medium while reducing the number of parts.

[0010] According to some embodiments of this application, the main body and the connecting part are integrally formed and bent together. In a cross-section perpendicular to the extension direction of the heat exchanger, the cross-sectional area of ​​the main body and the cross-sectional area of ​​the connecting part are the same. This ensures a uniform flow rate of the heat exchange medium inside the heat exchanger and facilitates the processing of the heat exchanger.

[0011] According to some embodiments of this application, multiple battery cells are arranged in an array along a second direction and a third direction, with the first direction, second direction, and third direction intersecting each other. The size of the battery cell in the second direction is smaller than the size of the battery cell in the third direction. The heat exchanger body abuts against at least one of the opposite side surfaces of the battery cell in the second direction. This ensures that the heat exchanger body abuts against the side with the larger area of ​​the battery cell, improving heat exchange efficiency.

[0012] According to some embodiments of this application, both the first and second manifolds are provided with multiple connection openings along a first direction. Multiple manifold connections are correspondingly provided with each of the multiple connection openings, and each of the multiple manifold connections is at least partially inserted into a connection opening and detachably connected to the first or second manifold along the first direction. This ensures a reliable connection between the manifold connections and the manifolds, allowing them to be connected by a force along the first direction and preventing leakage.

[0013] According to some embodiments of this application, the manifold connection includes a plug pipe extending along a first direction. The plug pipe is fitted with a sealing element and can extend into the connection opening and engage with the first manifold or the second manifold. This further stabilizes the connection between the manifold and the heat exchanger.

[0014] According to some embodiments of this application, the thermal management assembly further includes an edge heat exchanger. The edge heat exchanger is disposed on one side of the battery cell assembly and includes a connected edge heat exchange body and two edge connecting pipes. The edge heat exchange body is thermally connected to the battery cell, and the two edge connecting pipes are respectively connected to a first current collector and a second current collector. The thickness of the edge heat exchange body is less than the thickness of the heat exchange body. By providing a thinner heat exchanger at the edge, the compressive force on each battery cell becomes more uniform.

[0015] According to some embodiments of this application, the edge heat exchanger further includes a snap-fit ​​portion, which protrudes circumferentially along the edge connecting pipe and is detachably connected to the first housing portion or the second housing portion. Connecting the edge heat exchanger to the structure in the housing indirectly improves the support stability of the first and second manifolds.

[0016] According to some embodiments of this application, the thermal management component further includes an inlet pipe section and an outlet pipe section. Two edge connecting pipes of the edge heat exchanger are respectively connected between one of the inlet pipe section and the outlet pipe section and the first manifold, and between the other of the inlet pipe section and the outlet pipe section and the second manifold. Directly connecting the edge connecting pipes to the manifold reduces the required space.

[0017] Secondly, according to the embodiments of this application, an electrical device is provided, including the battery device in any embodiment of the first aspect, the battery device being used to provide electrical energy. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 A simplified schematic diagram of a vehicle provided for some embodiments of this application;

[0020] Figure 2 Explosion-proof diagrams of battery devices provided in some embodiments of this application;

[0021] Figure 3 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0022] Figure 4 A partial structural schematic diagram of a thermal management component provided in some embodiments of this application;

[0023] Figure 5 A partial structural schematic diagram of a thermal management component provided in other embodiments of this application;

[0024] Figure 6 for Figure 4 An enlarged view of region P shown.

[0025] Figure label:

[0026] 1000 - Vehicles;

[0027] 100 - Battery device; 200 - Controller; 300 - Motor;

[0028] 10 - Housing; 20 - Individual battery cells; 30 - Thermal management components;

[0029] 11-First housing section; 12-Second housing section; 13-Receiving cavity; 21-Battery cell; 31-First manifold; 32-Second manifold; 33-Heat exchanger; 34-Edge heat exchanger; 35-Inlet pipe section; 36-Outlet pipe section;

[0030] 311-Connection opening; 331-Heat exchange body; 332-Collecting connection part; 333-Body part; 334-Connection part; 335-Insertion pipe; 341-Edge heat exchange body; 342-Edge connecting pipe; 343-Snap-fit ​​part;

[0031] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0032] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0041] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0042] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0043] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0044] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0045] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0046] In some embodiments, the housing may be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the electrode assembly for outputting or inputting electrical energy into the battery cell.

[0047] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0048] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0049] In some embodiments, the battery device can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0050] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.

[0051] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0052] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0053] A battery device typically includes a housing, multiple battery cells housed within the housing, and a thermal management component for heat exchange with the battery cells. The housing provides containment, support, and protection, the battery cells provide power storage and charging / discharging functions, and the thermal management component heats or cools the battery cells, thereby enabling the battery cells to operate within a preset temperature range.

[0054] In embodiments incorporating a thermal management component, the component typically includes a heat exchanger and two manifolds. The manifolds communicate with chambers within the heat exchanger to form a complete flow channel, allowing the heat exchange medium to flow within the channel and exchange heat with the battery assembly. The heat exchanger is typically at least partially sandwiched between two rows or columns of battery cells to improve heat exchange efficiency.

[0055] Based on this, the applicant discovered that in existing battery devices, the manifold in the thermal management assembly is typically divided into multiple segments, each connected between two adjacent heat exchangers to form a complete flow channel. However, this structure requires numerous structural components, resulting in a large number of connections, a high risk of leakage, and difficulty in installation. The entire thermal management assembly must be assembled before it can be placed into the enclosure, leading to installation difficulties. Furthermore, due to the numerous connections, if the connection tolerances between the various heat exchangers and the manifold segments accumulate, gaps may easily exist at certain connections, preventing proper connection or causing detachment and leakage. This severely impacts the reliability of the battery device and reduces installation efficiency.

[0056] In view of this, the present application provides a technical solution that, by adjusting the setting position of the manifold in the thermal management component and the structure of the connection between the heat exchanger and the manifold, makes it easier to install the thermal management component into the housing and reduces the space required for the thermal management component.

[0057] The technical solutions described in this application are applicable to battery devices and electrical equipment using battery devices. Electrical equipment includes, for example, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft. Electric toys include, for example, stationary or mobile electric toys, specifically, game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include, for example, metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, specifically, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0058] The battery cells described in this application are not limited to the electrical devices described above, but for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0059] Please see Figure 1 , Figure 1 This is a simplified schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 can be installed inside the vehicle 1000; specifically, for example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 100 may also include a controller 200 and a motor 300. The controller 200, for example, is used to control the battery to supply power to the motor 300. The battery device 100 can be used for starting the vehicle 1000, navigation, etc. Of course, the battery can also be used to drive the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide propulsion for the vehicle 1000.

[0060] Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. For example... Figure 2 As shown, the battery device 100 includes a housing 10 and a battery cell 21, with the battery cell 21 housed within the housing 10.

[0061] The housing 10 is used to accommodate the battery cell 21, and the housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing portion 11 and a second housing portion 12, which overlap each other, and together define a receiving cavity 13 for accommodating the battery cell 21. The second housing portion 12 may be a hollow structure with one end open, and the first housing portion 11 may be a plate-like structure, with the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with the receiving cavity 13; alternatively, both the first housing portion 11 and the second housing portion 12 may be hollow structures with one side open, with the open side of the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with the receiving cavity 13. Of course, the first housing portion 11 and the second housing portion 12 can have various shapes, such as cylinders, cuboids, etc.

[0062] In a battery, there can be one or more battery cells 21. If there are multiple battery cells 21, they can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 21 are connected in both series and parallel. Multiple battery cells 21 can be directly connected in series, in parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 21 is housed in the housing 10. Alternatively, multiple battery cells 21 can first be connected in series, in parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed manner to form a whole assembly, which is then housed in the housing 10.

[0063] In some embodiments, there are multiple battery cells 21, which are first connected in series, parallel, or mixed to form a battery module. The multiple battery modules are then connected in series, parallel, or mixed to form a whole and housed in the housing 10.

[0064] Next, we will combine the appendix Figure 3 To be continued Figure 6 Describe the structure of the battery device and the electrical equipment.

[0065] Please refer to the following: Figure 3 and Figure 4 , Figure 3 This is a partial structural diagram of a battery device provided in some embodiments of this application. Figure 4 This is a partial structural diagram of a thermal management component provided in some embodiments of this application.

[0066] In a first aspect, this application provides a battery device 100, including a housing 10, a battery cell assembly 20, and a thermal management assembly 30. The housing 10 encloses a receiving cavity 13 and includes a first housing portion 11 and a second housing portion 12 arranged along a first direction X and interlocked with each other. The battery cell assembly 20 is disposed in the receiving cavity 13 and includes a plurality of battery cells 21. The thermal management assembly 30 includes a first manifold 31, a second manifold 32, and a plurality of heat exchange components 33, at least some of which are heat exchange components 33. Each heat exchanger 33 is disposed between adjacent battery cells 21 and includes a heat exchange body 331 and two current collection connection parts 332 connected to each other. The two current collection connection parts 332 are respectively connected to the first current collection pipe 31 and the second current collection pipe 32. At least a portion of the current collection connection parts 332 extend along the first direction X. The first current collection pipe 31 and the second current collection pipe 32 are respectively connected to the multiple current collection connection parts 332 along the first direction X. The first current collection pipe 31 and the second current collection pipe 32 are disposed on the same side of the battery cell assembly 20.

[0067] This application provides a battery device 100, including a housing 10 and a battery cell assembly 20 and a thermal management assembly 30 disposed within the housing 10. The housing 10 includes a first housing portion 11 and a second housing portion 12 arranged along a first direction X, and a receiving cavity 13 formed by the two portions. The battery cell assembly 20 and the thermal management assembly 30 are disposed within the receiving cavity 13. The battery cell assembly 20 includes a plurality of battery cells 21, which may be arranged in an array or other manner. The housing 10 may also include pads, current collectors, etc., for implementing preset electrical functions, which will not be described in detail here.

[0068] Optionally, the first housing portion 11 and the second housing portion 12 can be interlocked and detachably connected, optionally via fasteners or the like. During the installation of the battery cell assembly 20 and the thermal management assembly 30 into the housing 10, both can be first installed into one of the first housing portion 11 and the second housing portion 12, and then the other can be interlocked. This split structure facilitates the installation and maintenance of the internal components.

[0069] Both the battery cell assembly 20 and the thermal management assembly 30 are disposed in the housing cavity 13. The battery cell assembly 20 includes multiple battery cells 21. The battery cells 21 can be cylindrical, cuboid, or other shaped lithium-ion batteries. These battery cells 21 can be arranged in an array or other arrangement that can match the space inside the housing 10.

[0070] The thermal management assembly 30 includes a first manifold 31, a second manifold 32, and heat exchange components 33. Each heat exchange component 33 is connected to the first manifold 31 and the second manifold 32 to form a passage for the flow of the heat exchange medium. One of the first manifold 31 and the second manifold 32 is the inlet pipe, and the other is the outlet pipe. The heat exchange medium can be a gas or a liquid, such as air or coolant.

[0071] Furthermore, the heat exchanger 33 includes a heat exchange body 331 and a current collector connection 332. The heat exchange body 331 has an internal cavity for containing the heat exchange medium. The heat exchange body 331 is the main structure primarily used for heat exchange, and it is at least partially disposed between adjacent battery cells 21 for heat exchange with the battery cells 21 on both sides, heating or cooling them. The current collector connection 332 connects the heat exchange body 331 to the current collector pipe. Two current collector connections 332 in the same heat exchanger 33 can be disposed on the same side of the heat exchange body 331, so that the first current collector pipe 31 and the second current collector pipe 32 can be disposed on the same side of the battery cell assembly 20.

[0072] Optionally, the first current collector 31 and the second current collector 32 can extend continuously along one side edge of the battery cell assembly 20 to form a complete pipe, and communicate with the current collector connection 332 through an opening on the pipe. The current collector connection 332 can extend at least partially along the first direction X to facilitate docking with the first current collector 31 and the second current collector 32 in that direction. At the same time, the first current collector 31 and the second current collector 32 are both disposed on the same side of the battery cell assembly 20, and they can be optionally arranged to extend in the same direction. Compared with the structure in which two current collectors are disposed on two sides, the two current collectors disposed on the same side can effectively reduce the space required in the width direction.

[0073] In the battery device 100 provided in this application embodiment, at least a portion of the current collector connection portion 332 is configured to extend along the first direction X, that is, the opening and closing direction of the housing 10, and the first current collector pipe 31, the second current collector pipe 32 and each current collector connection portion 332 are also connected in the same direction.

[0074] Based on this, during the installation of the battery cell assembly 20 and the thermal management assembly 30 into the housing 10, the heat exchange components 33 and the battery cell 21 can be assembled into a combined structure first. This combined structure is then placed in the housing 10 and connected and fixed. After the aforementioned assembly is installed, the first manifold 31 and the second manifold 32 are pushed in along the first direction X and connected to the manifold connection 332. Installation can be easily completed by pressing along this direction, eliminating the need to leave extra space on the side of the manifold away from the battery cell assembly 20 in the housing 10, thus greatly reducing the lateral space required by the thermal management system. Furthermore, since the first manifold 31 and the second manifold 32 in this structure are fully extended tubular components and do not need to be divided into multiple sections, they offer high reliability and ease of assembly, further simplifying the overall assembly process.

[0075] In some optional embodiments, the flow connection portion 332 in the plurality of heat exchangers 33 extends along the first direction X, and the first flow collector 31 and the second flow collector 32 extend at least partially parallel to each other and are arranged along the first direction X.

[0076] Optionally, based on the aforementioned structure of the manifold connection 332, all manifold connections 332 in each heat exchanger 33 can be arranged to extend along the first direction X, that is, all manifold connections 332 are connected to the first manifold pipe 31 or the second manifold pipe 32 along the first direction X, so that the process of installing the manifold pipe by applying the action of the first direction X is more convenient and smooth.

[0077] Furthermore, the first manifold 31 and the second manifold 32 can be arranged along the first direction X, and they can be positioned opposite each other in this direction. That is, along the first direction X, the orthographic projections of the first manifold 31 and the second manifold 32 can at least partially overlap each other, and can be further selected so that the orthographic projections of the pipe body portions, except for the connection points, completely overlap. This can further reduce the required accommodation and installation space for the two manifolds in the width direction, thereby reducing the volume of the housing 10 and increasing the volumetric energy density.

[0078] Optionally, the first manifold 31 and the second manifold 32 may have the same or similar diameters and be made of the same material. The connection method used for connecting the two to the manifold connection part 332 may be the same to further simplify the installation.

[0079] Optionally, both the first manifold 31 and the second manifold 32 may include two sections extending along the two edges of the battery cell assembly 20, respectively. Taking the arrangement of multiple battery cells in the battery cell assembly 20 along the second direction Y and the third direction Z as an example, the first manifold 31 and the second manifold 32 may include a section extending along the second direction Y and a section extending along the third direction Z, so that the manifolds can enter and exit the housing 10 from a preset position while communicating with each heat exchanger 33. Specifically, one of the two sections of the first manifold 31 connected to each manifold connection 332 may extend parallel to and be directly opposite to one of the two sections of the second manifold 32 connected to each manifold connection 332 along the first direction X. Correspondingly, the two manifold connections 332 in each heat exchanger 33 may also be arranged along the first direction X at the same end of the heat exchange body 331.

[0080] By configuring the first current collector 31 and the second current collector 32 as described above, the space required for these two current collectors on the side of the battery cell assembly 20 can be further reduced, and their installation can be made easier.

[0081] In some optional embodiments, at least part of the heat exchanger 33 includes a plurality of body portions 333 and at least one connecting portion 334. Along the extension direction of the heat exchanger 33, the connecting portion 334 communicates between the ends of two adjacent body portions 333. The plurality of body portions 333 extend parallel to each other, and a battery cell 21 is sandwiched between adjacent body portions 333. Two current collector connecting portions 332 are respectively disposed on opposite ends of the heat exchanger 33 in its own extension direction.

[0082] Optionally, the heat exchanger 33 in the thermal management assembly 30 can adopt a variety of different structural forms, such as having different extension directions or extension lengths, to accommodate different numbers of battery cells 21.

[0083] Specifically, the same heat exchanger 33 may include multiple body parts 333 and connecting parts 334 connected between the body parts 333. The connecting parts 334 connect between the ends of adjacent body parts 333, and each body part 333 extends in parallel, so that the heat exchanger 33 forms a serpentine extension structure. Depending on the number of specific body parts 333, it may be in the shape of "U", "S", "W", etc.

[0084] Optionally, the lengths of each body part 333 can be the same, and their orthographic projections in the arrangement direction of the multiple body parts 333 can overlap to form a regular serpentine structure. A battery cell 21 can be provided between every two body parts 333, meaning the body parts 333 can extend in a serpentine pattern with each row / column of battery cells 21 as a unit.

[0085] Thus, in an embodiment where the same heat exchanger 33 includes two body parts 333 and one connecting part 334, the heat exchanger 33 is U-shaped; in an embodiment where the same heat exchanger 33 includes four body parts 333 and three connecting parts 334, the heat exchanger 33 is W-shaped, and so on, the selection is made according to the number of rows / columns of the battery cells 21.

[0086] Based on this, two flow-collecting connection parts 332 are respectively provided on the opposite two ends of the heat exchanger 33 in its own extension direction, so that the cooling medium can flow in from one of the flow-collecting connection parts 332, alternately and sequentially flow through each body part 333 and each connection part 334, and then flow out from the other flow-collecting connection part 332, forming a complete flow channel inside the heat exchanger 33.

[0087] This integrated design with multiple body sections 333 effectively reduces the number of current collector connections 332 while maintaining the same number of cooled battery cells 21. This further reduces the number of parts, lowers the risk of leakage, and reduces the number of interfaces required for current collector installation, making it easier to install. Simultaneously, one heat exchanger 33 covers multiple rows / columns of battery cells 21, improving the uniformity and integration of thermal management.

[0088] In some optional embodiments, each heat exchanger 33 includes 2 to 5 body parts 333.

[0089] In embodiments where the same heat exchanger 33 includes multiple body parts 333, the number of body parts 333 in each heat exchanger 33 can be 2 to 5, for example, 2 (in a U-shape), 4 (in a W-shape), 5, etc. The specific number can be set according to parameters such as the position of the current collection connection parts 332 at both ends, the number of rows / columns of the battery cells 21, and the requirements for heat exchange performance. This application does not impose any specific limitations on this.

[0090] By setting the number of body parts 333 in the heat exchanger 33 to be within the aforementioned range, it is possible to ensure the smooth flow of the heat exchange medium while reducing the number of interfaces and parts, and to reduce the possibility of problems such as increased flow resistance due to excessively long flow trajectories within the heat exchanger 33.

[0091] In some optional embodiments, the body portion 333 and the connecting portion 334 are integrally disposed and bent to connect, and in the cross-section perpendicular to the extending direction of the heat exchanger 33, the cross-sectional area of ​​the body portion 333 is the same as the cross-sectional area of ​​the connecting portion 334.

[0092] Optionally, in the same heat exchanger 33, the main body 333 and the connecting part 334 can be integrally formed and bent and connected. Depending on the arrangement of the battery cells 21, the main body 333 and the connecting part 334 can be selected to extend perpendicularly to each other.

[0093] The heat exchanger 33 can be manufactured by extrusion molding or other methods so that the connecting part 334 and the body part 333 have the same shape and cross-sectional area, thereby making the heat exchanger 33 easy to process while maintaining the uniformity of the internal heat exchange velocity and the smoothness of the flow.

[0094] In some optional embodiments, a plurality of battery cells 21 are arranged in an array along the second direction Y and the third direction Z, with the first direction X, the second direction Y and the third direction Z intersecting each other in pairs, and the size of the battery cell 21 in the second direction Y is smaller than the size of the battery cell 21 in the third direction Z; the body portion 333 abuts against at least one of the two opposite side surfaces of the battery cell 21 in the second direction Y.

[0095] A battery cell assembly 20, consisting of multiple battery cells 21, is disposed within the housing cavity 13 of the housing 10. These battery cells 21 may have the same or similar structure, shape, and size and be arranged in an array. Specifically, they may be arranged in an array along the second direction Y and the third direction Z, that is, arranged in a row of battery cells 21 along the second direction Y, while multiple rows of battery cells 21 are arranged along the third direction Z.

[0096] Based on this, the size of the battery cell 21 in the second direction Y can be smaller than the size of the battery cell 21 in the third direction Z. That is, the two surfaces of each battery cell 21 that are arranged opposite each other in the second direction Y can be the two surfaces of the battery cell 21 with the largest area. By making the body part 333 of each heat exchanger 33 abut against the larger surface of each battery cell 21, the heat exchange efficiency can be effectively improved, thereby further improving the thermal management effect.

[0097] Please see Figure 5 , Figure 5 This is a partial structural schematic diagram of a thermal management component provided in some other embodiments of this application.

[0098] In some optional embodiments, both the first collector pipe 31 and the second collector pipe 32 are provided with a plurality of connection openings 311 along the first direction X, and a plurality of collector connection parts 332 are provided in correspondence with the plurality of connection openings 311. The plurality of collector connection parts 332 are at least partially inserted into the connection openings 311 and are detachably connected to the first collector pipe 31 or the second collector pipe 32 along the first direction X.

[0099] Optionally, the first manifold 31 and the second manifold 32 may have multiple connection openings 311 on one side of their pipe walls in the first direction X. For example, the first manifold 31 and the second manifold 32 may be cylindrical pipes. The connection openings 311 may be directly provided on the pipe wall of the cylindrical pipe, or a structure similar to a tee joint may be formed on the manifold, so that the manifold protrudes in the direction where the opening is required, and an opening is formed on the protruding part. This can reduce the impact of the manifold connection part 332 being inserted into the opening on the flow rate of the internal heat exchange medium of the manifold itself.

[0100] Taking the first manifold 31 as an example, it can be provided with multiple connection openings 311. These connection openings 311 are arranged at intervals along the extension direction of the first manifold 31. The specific position and number can be selected according to the position and number of heat exchanger elements 33.

[0101] At least a portion of the structure of the manifold connection 332 is inserted into the aforementioned connection opening 311 along the first direction X to connect with the manifold. The through-plug connection makes the connection between the two more stable and less prone to leakage, and further facilitates the installation of the first manifold 31 and the second manifold 32 along the first direction X, simplifying the installation process.

[0102] In some alternative embodiments, the manifold connection 332 includes a connector 335 extending along a first direction X, the connector 335 being fitted with a seal, and the connector 335 being able to extend into the connection opening 311 and engage with the first manifold 31 or the second manifold 32.

[0103] Optionally, in an embodiment where the current collection connection 332 is plugged into two current collection pipes, the current collection connection 332 includes a plug tube 335 extending along a first direction X. The plug tube 335 may also be cylindrical, and a sealing ring may be fitted onto it to form a sealing structure between the plug tube 335 and the connection opening 311.

[0104] Understandably, before connecting the connector 335 to the manifold, the seal can be fitted onto the connector 335, in which case the outer circumferential surface of the connector 335 can be provided with an annular groove to define the specific position of the seal. Alternatively, the seal can be disposed in the connection opening 311, and the inner wall surface of the connection opening 311 can be provided with an annular groove recessed in a direction away from the central axis of the connection opening 311 to define the position of the seal. This application does not impose specific limitations on this, as long as both sides of the connector simultaneously abut against the connector 335 and the connection opening 311, and can fill the space to form a sealing structure.

[0105] During installation, the insertion tube 335 can be inserted into the connection opening 311 on the manifold along the first direction X, and a detachable fixed connection can be achieved through snap-fit ​​mechanisms such as snap rings and buckles, thus enabling convenient installation.

[0106] By combining plug-in and snap-fit ​​connections with sealing rings, a fast, reliable, and well-sealed connection method can be achieved, thereby simplifying the on-site installation and maintenance process and improving the overall stability and reliability of the battery device 100.

[0107] Please see Figure 6 , Figure 6 for Figure 4 An enlarged view of region P shown.

[0108] In some optional embodiments, the thermal management assembly 30 further includes an edge heat exchanger 34 disposed on one side of the battery cell assembly 20. The edge heat exchanger 34 includes an edge heat exchange body 341 and two edge connecting pipes 342 connected in communication. The edge heat exchange body 341 is thermally connected to the battery cell 21. The two edge connecting pipes 342 are respectively connected to the first current collector 31 and the second current collector 32. The thickness of the edge heat exchange body 341 is less than the thickness of the body portion 333.

[0109] The thermal management component 30 in this embodiment may further include an edge heat exchanger 34 located on one side edge of the overall structure of the battery cell assembly 20. The edge heat exchanger 34 may be disposed between the battery cell 21 and other structures in the housing 10, such as beams or partition walls, to provide heat exchange function to the outside of the row / column of battery cells 21 located at the outermost edge, so as to improve the temperature uniformity of each row / column of battery cells 21.

[0110] Specifically, the edge heat exchanger 34 is disposed on one side of the battery cell assembly 20 in the second direction Y or the third direction Z. The edge heat exchanger 34 may include a thin edge heat exchange body 341 and two edge connecting pipes 342. The edge heat exchange body 341 has the same or similar structure as the aforementioned body portion 333, but the edge heat exchange body 341 should be I-shaped, that is, there is only one edge heat exchange body 341. At the same time, the two edge connecting pipes 342 are respectively used to connect the cavity inside the edge heat exchange body 341 to the first manifold 31 and the second manifold 32 to form a flow channel for the heat exchange medium to pass through.

[0111] In embodiments where the edge heat exchanger 34 has only one edge heat exchanger body 341, the two edge connecting pipes 342 can both be disposed on the same side end of the edge heat exchanger body 341 and arranged along the first direction X, so that they can be conveniently connected to the first manifold 31 and the second manifold 32 respectively. Based on this, the edge heat exchanger 34 can have a thickness less than that of the body portion 333, so that during the expansion deformation of the battery cell 21 during operation, it can provide the battery cell 21 disposed at the edge with the same or similar compressive force as the internal battery cell 21, maintaining similar operating performance of each battery cell 21 and improving the consistency of the electrical performance of each battery cell 21.

[0112] In some optional embodiments, the edge heat exchanger 34 further includes a snap-fit ​​portion 343, which protrudes circumferentially along the edge connecting pipe 342 and is detachably connected to the first housing portion 11 or the second housing portion 12.

[0113] Optionally, to fix the edge connecting pipe 342 in the edge heat exchanger 34, a snap-fit ​​portion 343 may be provided thereon. The snap-fit ​​portion 343 is disposed on the edge connecting pipe 342 and protrudes from the outer peripheral surface of the edge connecting pipe 342. In the extending direction of the edge connecting pipe 342, the orthographic projection shape of the snap-fit ​​portion 343 may be rectangular, circular, polygonal, etc., and this application does not make any specific limitation in this regard.

[0114] Optionally, the structure by which the snap-fit ​​part 343 is connected to the housing 10 can be a partition, a beam, or a wall of the housing 10, etc. The specific structure can be selected according to the structure of the housing 10, and this application does not impose any specific limitations on it.

[0115] Furthermore, the snap-fit ​​part 343 can be detachably connected to the first housing part 11 or the second housing part 12 by screws, buckles, connectors, etc., thereby stabilizing the position of the edge connecting pipe 342 through the connection between the snap-fit ​​part 343 and the housing 10 structure, and thus stabilizing the position of the first manifold 31 / second manifold 32 to which it is connected.

[0116] In some optional embodiments, the thermal management assembly 30 further includes an inlet pipe section 35 and an outlet pipe section 36, and the two edge connecting pipes 342 of the edge heat exchanger 34 are respectively connected between one of the inlet pipe section 35 and the outlet pipe section 36 and the first manifold 31, and between the other of the inlet pipe section 35 and the outlet pipe section 36 and the second manifold 32.

[0117] Optionally, the two pipes used to transfer the heat exchange medium to each heat exchanger 33 may each include two parts. One pipe includes one of the liquid inlet pipe section 35 and the liquid outlet pipe section 36 and the first manifold 31, and the other pipe includes the other of the liquid inlet pipe section 35 and the liquid outlet pipe section 36 and the second manifold 32. The first manifold 31 and the second manifold 32 are used to connect to multiple heat exchangers 33, and the liquid inlet pipe section 35 and the liquid outlet pipe section 36 are used to connect the two manifolds to an external liquid pump or heat exchange medium storage container to form a complete heat exchange medium flow loop.

[0118] Based on this, taking the connection between the inlet pipe section 35 and the first manifold 31, and the connection between the outlet pipe section 36 and the second manifold 32 as an example, the two edge connecting pipes 342 of the edge heat exchanger 34 can be connected between the first manifold 31 and the inlet pipe section 35, and between the second manifold 32 and the outlet pipe section 36, respectively, that is, connected in series in the aforementioned two inlet and outlet pipes. The inner and outer diameters of the two edge connecting pipes 342 can be the same as the inner and outer diameters of the manifold, as well as the inner and outer diameters of the inlet pipe section 35 and the outlet pipe section 36, respectively, to facilitate connection and allow the edge heat exchanger 34 to be smoothly connected in parallel into the main circulation pipeline.

[0119] By directly connecting the edge connecting pipe 342 into the main circulation pipeline without setting a joint for mating along the first direction X, space at the edge can be saved, and the conflict between the connecting parts that need to be bent and the narrow space at the edge can be avoided, thereby further improving the reliability of the thermal management components and reducing their required space.

[0120] Secondly, according to the embodiments of this application, an electrical device is provided, including the battery device 100 in any embodiment of the first aspect, the battery device 100 being used to provide electrical energy.

[0121] The electrical device in this embodiment has all the beneficial effects of the battery device 100 in the first aspect. For details, please refer to the specific description of the battery device 100 in the above embodiments. This embodiment will not repeat the description here.

[0122] This application provides a battery device 100, including a housing 10, a battery cell assembly 20, and a thermal management assembly 30. The housing 10 encloses a receiving cavity 13 and includes a first housing portion 11 and a second housing portion 12 arranged along a first direction X and interlocked with each other. The battery cell assembly 20 is disposed in the receiving cavity 13 and includes a plurality of battery cells 21. The thermal management assembly 30 includes a first manifold 31, a second manifold 32, and a plurality of heat exchange components 33, at least some of which are provided. Between adjacent battery cells 21, each heat exchanger 33 includes a heat exchange body 331 and two current collection connection parts 332 that are connected to each other. The two current collection connection parts 332 are connected to the first current collection pipe 31 and the second current collection pipe 32 respectively. At least a portion of the current collection connection parts 332 extend along the first direction X. The first current collection pipe 31 and the second current collection pipe 32 are respectively connected to the multiple current collection connection parts 332 along the first direction X. The first current collection pipe 31 and the second current collection pipe 32 are located on the same side of the battery cell assembly 20.

[0123] At least part of the heat exchanger 33 includes a plurality of body parts 333 and at least one connecting part 334. Along the extension direction of the heat exchanger 33, the connecting part 334 connects the ends of two adjacent body parts 333. The plurality of body parts 333 extend parallel to each other. A battery cell 21 is sandwiched between adjacent body parts 333. Two current collector connecting parts 332 are respectively disposed on opposite ends of the heat exchanger 33 in its own extension direction.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A box body, which encloses and forms a receiving cavity, the box body includes a first box body part and a second box body part arranged along a first direction and interlocking with each other; A battery cell assembly is disposed in the receiving cavity, and the battery cell assembly includes a plurality of battery cells; A thermal management component includes a first manifold, a second manifold, and a plurality of heat exchange components. At least some of the heat exchange components are disposed between adjacent battery cells. Each heat exchange component includes a connected heat exchange body and two current collection connection parts. The two current collection connection parts are respectively connected to the first manifold and the second manifold. In this configuration, at least a portion of the current collector connection extends along the first direction, and the first current collector and the second current collector are respectively connected to a plurality of current collector connection portions along the first direction, and the first current collector and the second current collector are disposed on the same side of the battery cell assembly.

2. The battery device according to claim 1, characterized in that, The flow collection connection portions of the plurality of heat exchange components all extend along the first direction, and the first flow collection pipe and the second flow collection pipe extend at least partially parallel to each other and are arranged along the first direction.

3. The battery device according to claim 1, characterized in that, At least part of the heat exchanger body includes a plurality of body parts and at least one connecting part. Along the extension direction of the heat exchanger, the connecting part communicates between the ends of two adjacent body parts. The plurality of body parts extend parallel to each other. The battery cell is sandwiched between adjacent body parts. The two current collector connecting parts are respectively disposed at opposite ends of the heat exchanger in its own extension direction.

4. The battery device according to claim 3, characterized in that, Each heat exchanger includes 2 to 5 of the aforementioned body parts.

5. The battery device according to claim 3, characterized in that, The main body and the connecting part are integrally formed and bent together. In a cross-section perpendicular to the extension direction of the heat exchanger, the cross-sectional area of ​​the main body and the cross-sectional area of ​​the connecting part are the same.

6. The battery device according to claim 1, characterized in that, Multiple battery cells are arranged in an array along a second direction and a third direction, with the first direction, the second direction and the third direction intersecting each other in pairs. The size of the battery cell in the second direction is smaller than the size of the battery cell in the third direction. The heat exchange body abuts against at least one of the two opposing surfaces of the battery cell in the second direction.

7. The battery device according to claim 1, characterized in that, Both the first and second collectors are provided with multiple connection openings along the first direction. The multiple collector connections are provided one-to-one with the multiple connection openings. The multiple collector connections are at least partially inserted into the connection openings and are detachably connected to the first or second collector along the first direction.

8. The battery device according to claim 7, characterized in that, The current collection connection includes a plug tube extending along the first direction. The plug tube is fitted with a sealing element and can extend into the connection opening and be snapped into the first current collection tube or the second current collection tube.

9. The battery device according to claim 1, characterized in that, The thermal management component further includes an edge heat exchanger, which is disposed on one side of the battery cell assembly. The edge heat exchanger includes a connected edge heat exchange body and two edge connecting pipes. The edge heat exchange body is thermally connected to the battery cell, and the two edge connecting pipes are respectively connected to the first manifold and the second manifold. The thickness of the edge heat exchange body is less than the thickness of the heat exchange body.

10. The battery device according to claim 9, characterized in that, The edge heat exchanger also includes a snap-fit ​​part, which protrudes circumferentially along the edge connecting pipe and is detachably connected to the first housing part or the second housing part.

11. The battery device according to claim 9, characterized in that, The thermal management component further includes an inlet pipe section and an outlet pipe section. The two edge connecting pipes of the edge heat exchanger are respectively connected between one of the inlet pipe section and the outlet pipe section and the first manifold, and between the other of the inlet pipe section and the outlet pipe section and the second manifold.

12. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-11, the battery device being used to provide electrical energy.

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