Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a box assembly, a battery cell assembly, a thermal management assembly and a mounting assembly. The battery cell assembly comprises a plurality of battery cells stacked along a second direction. The battery cell comprises a shell and an electrode terminal. The electrode terminal is arranged on a side of the shell facing the second box. The thermal management assembly is arranged between the battery cell assembly and the second box. The thermal management assembly comprises a current collector and an end heat exchange element connected to the current collector. The end heat exchange element is arranged in a third direction at intervals with the electrode terminal. The end heat exchange element comprises a heat exchange shell and a reinforcing rib arranged inside the heat exchange shell. At least part of the mounting assembly is arranged on a side of the second box away from the first box in the first direction. The mounting assembly is used for mounting on an external structure. In the first direction, the end heat exchange element and the mounting assembly at least partially overlap, thereby improving the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device and an electrical device. Background Technology

[0002] In recent years, with the rapid development of new energy technologies, new energy vehicles have become increasingly widely used and are gradually replacing traditional fuel vehicles, becoming one of the mainstream modes of transportation. As the power source of new energy vehicles, the power battery is one of their core components; therefore, the safety performance of the power battery has become a key focus of attention.

[0003] In the development of battery technology, improving the reliability of battery devices is a key research direction. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, which includes a housing assembly, a battery cell assembly, a thermal management assembly, and a mounting assembly. The housing assembly includes a first housing and a second housing arranged along a first direction, the first housing and the second housing being interconnected to form a cavity, the first housing being located on the upper side of the second housing. The battery cell assembly is located within the cavity, and the battery cell assembly includes a plurality of battery cells stacked along a second direction. Each battery cell includes a housing and electrode terminals, the electrode terminals being disposed on the side of the housing facing the second housing. The thermal management assembly is disposed between the battery cell assembly and the second housing, and the thermal management assembly includes a current collector and an end heat exchanger connected to the current collector. The end heat exchanger and the electrode terminals are spaced apart along a third direction, and the end heat exchanger includes a heat exchange shell and reinforcing ribs disposed inside the heat exchange shell. At least a portion of the mounting assembly is disposed in the first direction on the side of the second housing away from the first housing, and the mounting assembly is used to mount to an external structure. Along the first direction, the end heat exchanger and the mounting assembly at least partially overlap. The first direction, the second direction, and the third direction are intersecting each other.

[0006] In the above scheme, by placing the thermal management component and the electrode terminals on the same side and spacing them apart, the internal space utilization of the battery device can be improved, thereby increasing the energy density of the battery device. By setting the end heat exchanger as a structure of heat exchange shell and reinforcing ribs, the supporting force of the end heat exchanger on the battery cell assembly can be improved. By at least partially overlapping the projection of the end heat exchanger and the mounting component along the first direction, it can be used to support the weight of the end of the battery device, thereby strengthening the structural strength of the battery device and improving its reliability.

[0007] In some embodiments, the end heat exchanger is fixedly connected to the second housing.

[0008] In the above solution, by fixing the end heat exchange component to the second housing, the overall rigidity of the battery device can be improved, thereby further improving the reliability of the battery device.

[0009] In some embodiments, the battery device further includes a first buffer member disposed between the end heat exchange member and the second housing in a first direction.

[0010] In the above scheme, the first buffer has a buffering effect on the battery cell assembly above the end buffer, protecting the battery cell.

[0011] In some embodiments, the first buffer member is bonded and fixed to the end heat exchange member and the second housing on opposite sides along the first direction, respectively.

[0012] In the above solution, by sequentially bonding the end heat exchange component, the first buffer component, and the second housing, the overall rigidity of the battery device can be further improved, and the reliability of the battery device can be further enhanced.

[0013] In some embodiments, an end heat exchange channel is formed inside the heat exchange shell, and the end heat exchange channel is divided into multiple end heat exchange sub-channels by reinforcing ribs.

[0014] In the above scheme, the heat exchange flow rate of the end heat exchanger can be increased by using multiple end heat exchange sub-channels, thereby improving the heat exchange effect.

[0015] In some embodiments, the end heat exchange sub-channel extends along a second direction and can cover multiple battery cells in the battery cell assembly to exchange heat for the multiple battery cells and improve the temperature uniformity between battery cells.

[0016] In some embodiments, there are multiple reinforcing ribs, which are spaced apart along a third direction.

[0017] The above solution can further increase the strength of the end heat exchange components and improve the temperature uniformity of each part of the battery cell along the third direction.

[0018] In some embodiments, the second housing includes a bottom plate and a side panel connected along the outer periphery of the bottom plate. The mounting assembly includes a first mounting member, which includes a base support and a mounting portion. The mounting portion bends from the base support toward the first housing, and the base support is disposed on the side of the bottom plate away from the first housing.

[0019] In the above scheme, the design of the base and mounting parts not only strengthens the mechanical strength of the battery device and optimizes the stress distribution, but also achieves a compact structure and convenient installation.

[0020] In some embodiments, the second housing further includes a flanged portion connected to the side of the side panel away from the bottom plate; the mounting portion includes a first bending section and a second bending section, the first bending section is connected to the bottom support portion, the second bending section is connected to the side of the first bending section away from the bottom support portion, the first bending section bends from the bottom support portion toward the first housing, and the second bending section bends from the first bending section toward the direction away from the cavity; the second bending section is connected to the flanged portion.

[0021] In the above scheme, the design of the flange and multiple bending sections enhances the structural rigidity of the mounting components, thereby providing a stable and reliable mounting method for the battery device in a compact space.

[0022] In some embodiments, the second bending section is provided with a first groove recessed in the direction toward the second housing; and / or, the flange portion is provided with a second groove recessed in the direction toward the second housing.

[0023] In the above solution, the first groove and / or the second groove facilitate positioning and increase the connection quality between the mounting component and the second housing.

[0024] In some embodiments, the mounting assembly further includes a second mounting member connected to the flange portion, the second mounting member being disposed on the side of the flange portion opposite to the first mounting member.

[0025] In the above scheme, the structural strength of the mounting assembly is further increased by adding a second mounting component.

[0026] In some embodiments, the second mount is provided with a first protrusion that protrudes in a direction away from the second housing.

[0027] In the above scheme, the first protrusion can increase the structural strength of the second mounting component.

[0028] In some embodiments, the mounting assembly further includes a reinforcing post that passes sequentially through the second mounting member and the flange, with the end of the reinforcing post abutting against the first mounting member.

[0029] In the above solution, the reinforcing column integrates the scattered components into a robust whole through rigid interconnection, increasing the reliability of the connection.

[0030] In some embodiments, the base portion is provided with a second protrusion that protrudes in a direction away from the second housing.

[0031] In the above scheme, the second protrusion can increase the structural strength of the base and improve its load-bearing capacity.

[0032] In some embodiments, the battery device includes a plurality of battery cell assemblies arranged along a third direction; the thermal management assembly includes a current collector and a plurality of heat exchangers connected to the current collector, the plurality of heat exchangers being spaced apart along a third direction, the heat exchangers including two end heat exchangers and at least one intermediate heat exchanger; along the third direction, the intermediate heat exchanger is located between the two end heat exchangers; wherein the intermediate heat exchanger is heat-exchange connected to two adjacent battery cell assemblies.

[0033] In the above scheme, the heat exchange efficiency of the thermal management component can be improved by connecting the intermediate heat exchange component with the two adjacent battery cell modules.

[0034] In some embodiments, the battery device further includes a second buffer member, which is located between the intermediate heat exchange member and the second housing in the first direction.

[0035] In the above solution, the second buffer can protect the battery cells on the upper side of the intermediate heat exchanger, further improving the reliability of the battery device.

[0036] In some embodiments, the current collector includes a first flow channel and a second flow channel arranged adjacent to each other, and the intermediate heat exchanger includes an inlet flow channel and an outlet flow channel. The flow direction of the heat exchange medium in the inlet flow channel is away from the current collector, and the flow direction of the heat exchange medium in the outlet flow channel is towards the current collector. The inlet flow channel is connected to the first flow channel, and the outlet flow channel is connected to the second flow channel.

[0037] In the above scheme, the current collector integrates the adjacent first and second flow channels to handle the liquid supply and return of multiple intermediate heat exchangers. This eliminates the need to design separate external liquid inlet and return pipelines for each intermediate heat exchanger. Furthermore, the adjacent arrangement of the first and second flow channels improves the integration of the thermal management components, simplifies the structure, and enhances the energy density of the battery device.

[0038] Secondly, embodiments of this application also provide an electrical device, including the aforementioned battery device, which is used to provide electrical energy.

[0039] The electrical device provided in this application embodiment has the same technical effect as the battery provided in the above embodiment, and will not be described again here. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0041] Figure 1This is a schematic diagram of the vehicle structure according to some embodiments of this application; Figure 2 Exploded views of battery devices according to some embodiments of this application; Figure 3 This is a schematic diagram of the structure of a battery module according to some embodiments of this application; Figure 4 This is an exploded structural diagram of a battery cell according to some embodiments of this application; Figure 5 This is an exploded structural diagram of a battery device according to some embodiments of this application; Figure 6 This is a partial cross-sectional schematic diagram of a battery device according to some embodiments of this application; Figure 7 This is a cross-sectional schematic diagram of the end heat exchanger according to some embodiments of this application; Figure 8 yes Figure 6 Enlarged diagram of section A in the middle; Figure 9 This is a schematic diagram of the structure of the second housing and mounting assembly according to some embodiments of this application; Figure 10 This is a structural schematic diagram of the second housing and mounting assembly according to other embodiments of this application; Figure 11 This is another partial cross-sectional schematic diagram of a battery device according to some embodiments of this application; Figure 12 This is a top view of a thermal management component according to some embodiments of this application; Figure 13 This is a cross-sectional schematic diagram of a battery device according to some embodiments of this application; Figure 14 This is another partial cross-sectional schematic diagram of a battery device according to some embodiments of this application; Figure 15 This is a partially exploded structural diagram of a thermal management component according to some embodiments of this application.

[0042] Explanation of reference numerals in the attached figures: 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, First Housing; 30, Second Housing; 31, Base Plate; 32, Side Panel; 33, Flanged Edge; 331, Second Recess; 400, Battery Module; 20, Battery Cell; 21, End Cap; 22, Housing; 23, Electrode Assembly; 24, Outer Shell; 26, Electrode Terminal; 40, Battery Cell Assembly; 50, Thermal Management Assembly; 51, Current Collector; 511, First Flow Channel; 512, Second Flow Channel; 52, Heat Exchanger; 521, End Heat Exchanger; 522, Intermediate Heat Exchanger ; 5221, Inlet channel; 5222, Outlet channel; 523, Heat exchange shell; 524, Reinforcing rib; 525, End heat exchange channel; 526, End heat exchange sub-channel; 60, Mounting assembly; 61, First mounting component; 611, Base support; 612, Mounting part; 613, First bending section; 614, Second bending section; 615, First groove; 616, Second protrusion; 62, Second mounting component; 621, First protrusion; 63, Reinforcing column; 71, First buffer; 72, Second buffer; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0043] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0045] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0047] In this application, "multiple" means two or more (including two).

[0048] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0049] The battery mentioned in the embodiments of this application may be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0050] In some embodiments, the battery can be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0051] In some embodiments, the battery can be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.

[0052] 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.

[0053] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0054] A single battery cell typically includes an electrode assembly. The electrode assembly comprises 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.

[0055] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0056] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0057] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of silver-treated stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0058] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more.

[0059] In some embodiments, the positive electrode can be made of foamed carbon or foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or a foamed alloy, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal may also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0060] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0061] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, silver-surfaced stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium can be used. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0062] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0063] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0064] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc.

[0065] In some embodiments, the negative electrode can be made of foamed carbon or foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foamed alloy, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0066] As an example, lithium source material, potassium metal or sodium metal may also be filled or deposited in the negative electrode current collector, wherein the lithium source material is lithium metal and / or lithium-rich material.

[0067] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0068] In some embodiments, the electrode assembly further includes a separator disposed between the positive and negative electrodes. This application does not impose any particular limitation on the type of separator; any known porous separator with good chemical and mechanical stability can be selected.

[0069] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride, and ceramic.

[0070] 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.

[0071] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0072] In some implementations, the electrode assembly is a stacked structure.

[0073] Multiple positive and negative electrodes can be set separately, and multiple positive and multiple negative electrodes can be stacked alternately.

[0074] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0075] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0076] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0077] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0078] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0079] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0080] The battery device contains many components and is quite heavy. If there is a lack of effective support and transmission paths, the battery device is prone to structural deformation or damage when subjected to vibration, impact, or long-term use, thereby reducing the reliability of the battery device.

[0081] To address the aforementioned technical problems, this application provides a battery device. By placing the thermal management component and the electrode terminals on the same side, and spaced apart from each other, the internal space utilization of the battery device can be improved, thereby increasing the energy density of the battery device. By configuring the end heat exchanger as a structure of heat exchange shell and reinforcing ribs, the supporting force of the end heat exchanger on the battery cell assembly can be improved. The projection of the end heat exchanger and the mounting member along the first direction at least partially overlaps, which can be used to support the weight of the end of the battery device, thereby strengthening the structural strength of the battery device and improving its reliability.

[0082] The technical solutions described in the embodiments of this application are applicable to electrode assemblies, battery cells including electrode elements, batteries including battery cells, and electrical devices using batteries.

[0083] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0084] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0085] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 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 is installed inside the vehicle 1000, and the battery device 100 can be located 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 1000 may also include 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0086] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0087] Please refer to Figure 2 , Figure 2 This is an exploded view of the apparatus provided in some embodiments of this application. The battery device 100 includes a battery housing and a battery cell 20. In some embodiments, the battery housing may include a first housing 10 and a second housing 30, which overlap each other, and together define a receiving cavity for accommodating the battery cell 20. The second housing 30 may be a hollow structure with one open end, and the first housing 10 may be a plate-like structure, with the first housing 10 covering the open side of the second housing 30 so that the first housing 10 and the second housing 30 together define the receiving cavity; the first housing 10 and the second housing 30 may also both be hollow structures with one open side, with the open side of the first housing 10 covering the open side of the second housing 30. Of course, the battery housing formed by the first housing 10 and the second housing 30 can be of various shapes, such as a cylinder, a cuboid, etc.

[0088] Figure 3This is a schematic diagram of the structure of a battery module according to some embodiments of this application. In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 20 is housed in a housing. Of course, the battery device 100 can also be in the form of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery module 400, and then multiple battery modules 400 are connected in series, parallel, or in a mixed manner to form a whole and housed in a housing. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar component for realizing the electrical connection between multiple battery cells 20.

[0089] Each battery cell 20 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0090] Figure 4 This is an exploded structural diagram of a battery cell according to some embodiments of this application. The end cap 21 is a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 can be adapted to the shape of the housing 22 to fit it. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is less prone to deformation under pressure and impact, enabling the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 26 can be provided on the end cap 21. The electrode terminals 26 can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy into the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application does not impose special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0091] Figure 5 This is an exploded structural diagram of a battery device according to some embodiments of this application; Figure 6 This is a partial cross-sectional schematic diagram of a battery device according to some embodiments of this application; Figure 7 This is a cross-sectional schematic diagram of the end heat exchanger of some embodiments of this application.

[0092] Please refer to the following: Figures 5-7 In a first aspect, embodiments of this application provide a battery device 100, which includes a housing assembly, a battery cell assembly 40, a thermal management assembly 50, and a mounting assembly 60. The housing assembly includes a first housing 10 and a second housing 30 arranged along a first direction X. The first housing 10 and the second housing 30 are interconnected to form a cavity, and the first housing 10 is located on the upper side of the second housing 30. The battery cell assembly 40 is located in the cavity and includes a plurality of battery cells 20 stacked along a second direction Y. Each battery cell 20 includes a housing 24 and an electrode terminal 26, with the electrode terminal 26 disposed on the side of the housing 24 facing the second housing 30. The thermal management assembly 50 is provided with... Between the battery cell assembly 40 and the second housing 30, the thermal management assembly 50 includes a current collector 51 and an end heat exchanger 521 connected to the current collector 51. The end heat exchanger 521 and the electrode terminal 26 are spaced apart along the third direction Z. The end heat exchanger 521 includes a heat exchange shell 523 and a reinforcing rib 524 disposed inside the heat exchange shell 523. At least a portion of the mounting assembly 60 is disposed on the side of the second housing 30 away from the first housing 10 in the first direction X. The mounting assembly 60 is used to mount on an external structure. Along the first direction X, the end heat exchanger 521 and the mounting assembly 60 overlap at least partially. The first direction X, the second direction Y and the third direction Z are intersecting each other.

[0093] The first direction X can be the height direction of the battery cell 20, the second direction Y can be the thickness direction of the battery cell 20, and the third direction Z can be the width direction of the battery cell 20.

[0094] The first housing 10 can be the upper housing, and the second housing 30 can be the lower housing. The first housing 10 and the second housing 30 are interlocked to form a closed cavity for accommodating the battery cell 20. The first housing 10 and the second housing 30 can be connected by bolts, snap-fitting, welding, adhesive, or other methods.

[0095] There can be one or more battery cell modules 40, for example, multiple battery cell modules 40 are arranged sequentially along the third direction Z.

[0096] The thermal management component 50 is used for heat exchange of the battery cell 20. The end heat exchange element 521 of the thermal management component 50 forms an end heat exchange channel 525, within which a heat exchange medium flows. The heat exchange medium may include ethylene glycol, water, or silicone oil, etc. Depending on the ambient temperature, the heat exchange medium can be used to cool or heat the battery cell 20. For example, when the vehicle 1000 is traveling at high speed or the battery device 100 is charging and discharging at a high rate, the battery cell 20 generates a large amount of heat. The low-temperature heat exchange medium circulates in the heat exchange channel, transferring the heat away, which can, to some extent, prevent the battery cell 20 from overheating, thereby extending the lifespan of the battery cell 20. When the ambient temperature is very low, the battery cell 20 can be heated using a heated heat exchange medium to ensure that the battery cell 20 operates at a suitable temperature.

[0097] The collector 51 can extend along a third direction Z, and the end heat exchanger 521 extends along a second direction Y. The collector 51 is used to transfer the heat exchange medium to the end heat exchanger 521. The inlet and outlet can be respectively provided on the collector 51, or they can be provided at the end of the end heat exchanger 521 away from the collector 51. There can be two end heat exchangers 521, and the two end heat exchangers 521 are arranged at intervals along a third direction Z. For example, the end heat exchanger 521 includes a first flow channel 511 and a second flow channel 512. If the inlet and outlet are located at both ends of the collector 51 along the third direction Z, with the inlet located in the first flow channel 511 and the outlet located in the second flow channel 512, and the end heat exchange channel 525 of one end heat exchanger 521 is connected to the first flow channel 511, and the end heat exchange channel 525 of the other end heat exchanger 521 is connected to the second flow channel 512, then the heat exchange channels of both end heat exchangers 521 are bidirectional channels, capable of both liquid inlet and outlet. After the heat exchange medium enters the first flow channel 511 from the inlet, it flows into one of the end heat exchangers 521, then enters the second flow channel 512 after passing through the end heat exchange channel 525 of the bidirectional flow channel of the end heat exchanger 521, and can flow out from the outlet after passing through the second flow channel 512. Part of the heat exchange medium that has passed through the first flow channel 511 flows into another end heat exchanger 521, and finally flows out from the outlet of the second flow channel 512 after passing through the end heat exchange channel 525 of the bidirectional flow channel of the end heat exchanger 521.

[0098] Alternatively, the inlet can be located at the end of one end heat exchanger 521 opposite to the collector 51, and the outlet can be located at the end of the other end heat exchanger 521 opposite to the collector 51. Both end heat exchanger channels 525 of both end heat exchangers 521 are unidirectional channels. The heat exchange medium flows from the inlet into the end heat exchanger channel 525 of one end heat exchanger 521, then passes through the collector 51, enters the end heat exchanger channel 525 of the other end heat exchanger 521, and finally flows out from the outlet.

[0099] The battery cell 20 can be inverted, with the electrode terminals 26 facing downwards. The electrode terminals 26 and the end heat exchangers 521 are spaced apart along the third direction Z, with both the positive and negative electrode terminals 26 located between the two end heat exchangers 521. There is a gap between the electrode terminals 26 and the second housing 30 along the third direction Z. By placing the end heat exchangers 521 within this gap, the internal space of the battery device 100 can be fully utilized without sacrificing the installation space of the battery cells 20.

[0100] The end heat exchanger 521 includes a heat exchange shell 523 and a reinforcing rib 524 disposed inside the heat exchange shell 523; at least a portion of the mounting assembly 60 is disposed on the side of the second housing 30 away from the first housing 10 in the first direction X, and the mounting assembly 60 is used to mount on the external structure. Along the first direction X, the end heat exchanger 521 and the mounting assembly 60 overlap at least partially.

[0101] The reinforcing rib 524 can be elongated, or it can be in the form of a block, a ball, etc. There can be multiple reinforcing ribs 524, which are spaced apart.

[0102] The mounting component 60 is a structure that connects the battery device 100 to external equipment (such as the chassis of an electric vehicle or the bracket of an energy storage system), and may include mounting brackets, bolt connection points, etc.

[0103] The end heat exchanger 521 serves both thermal management and structural support functions. The reinforcing ribs 524 inside the heat exchanger shell 523 enhance its mechanical strength and rigidity, transforming it from a simple fluid container into a robust structural beam. This beam directly supports the end weight of the upper battery cell assembly 40.

[0104] The weight of the battery pack 100 is transferred downwards through the end heat exchanger 521. Since it at least partially overlaps with the mounting assembly 60 below in the first direction X, weight and external impact forces can be transferred via a very short and direct path: battery → end heat exchanger 521 → mounting assembly 60 → external structure (such as the vehicle body). This makes the battery pack 100 very compact not only in the first direction X but also in the third direction Z, increasing the arrangement space for the individual battery cells 20 and thus directly improving the energy density of the entire battery pack. This design also enhances the overall structural rigidity and shock and vibration resistance of the battery pack 100, improving reliability.

[0105] In the above scheme, by placing the thermal management component 50 and the electrode terminal 26 on the same side and spaced apart from each other, the space utilization rate inside the battery device 100 can be improved, thereby increasing the energy density of the battery device 100. By setting the end heat exchanger 521 as a structure of heat exchange shell 523 and reinforcing rib 524, the supporting force of the end heat exchanger 521 on the battery cell assembly 40 can be improved. The projection of the end heat exchanger 521 and the mounting member along the first direction X at least partially overlaps, which can be used to support the weight of the end of the battery device 100, thereby strengthening the structural strength of the battery device 100 and improving the reliability of the battery device 100.

[0106] In some embodiments, the end heat exchanger 521 is fixedly connected to the second housing 30.

[0107] The end heat exchanger 521 can be fixedly connected to the second housing 30 along the first direction X and facing the second housing 30 by means of a colloid, bolt or other structure.

[0108] Without a fixed connection, the weight of the battery cell 20 supported by the end heat exchanger 521 can only be transferred through the contact surface between itself and the second housing 30, which may result in stress concentration points. When it is rigidly fixed by colloid or bolts, the end heat exchanger 521 and the second housing 30 form a composite structure. They can deform together and share the load collaboratively, distributing the load from the battery cell 20 more evenly across the bottom plate 31 of the entire second housing 30.

[0109] In the vibration environment of the vehicle 1000 during operation, the fixed connection reduces minor relative displacement or vibration between the end heat exchanger 521 and the second housing 30. This eliminates a potential source of wear and noise, and improves the structural stability and fatigue life of the battery device 100 under dynamic operating conditions.

[0110] In the above solution, by fixing the end heat exchanger 521 to the second housing 30, the overall rigidity of the battery device 100 can be improved, thereby further improving the reliability of the battery device 100.

[0111] Figure 8 yes Figure 6 Enlarged schematic diagram of part A in the middle.

[0112] like Figure 8 As shown, in some embodiments, the battery device 100 further includes a first buffer 71, which is disposed between the end heat exchanger 521 and the second housing 30 along the first direction X.

[0113] The first buffer element 71 can be made of materials such as polycarbonate and polyethylene, which have both cushioning and insulating properties, and also have good adhesion and structural strength. The first buffer element 71 can also serve as a heat insulation component to insulate the upper end heat exchange element 521, reducing the probability of heat transfer from the second housing 30, thereby improving the heat exchange effect.

[0114] When the battery pack 100 is used in an electric vehicle, it will continuously experience minute, high-frequency vibrations from the road surface. Without the first buffer 71, these vibrations would be directly transmitted to the end heat exchanger 521 via the second housing 30, and then to the battery cell 20. Long-term vibration can lead to fatigue of the internal structure of the battery cell 20, loosening of connectors, and wear of insulation. The first buffer 71 can absorb and dissipate this vibration energy, providing a more stable operating environment for the battery cell 20.

[0115] When the vehicle 1000 travels over potholes, collides, or brakes suddenly, the battery unit 100 will be subjected to a large instantaneous impact force. The first buffer 71 prolongs the impact time through its own elastic deformation, which can reduce the impact acceleration transmitted to the battery cell 20 and prevent serious damage such as cracking of the battery cell 20 casing 24 and misalignment of the electrode plates to a certain extent.

[0116] In the above scheme, the first buffer 71 has a buffering effect on the battery cell assembly 40 above the end buffer, protecting the battery cell 20.

[0117] In some embodiments, the first buffer 71 is bonded and fixed to the end heat exchanger 521 and the second housing 30 on opposite sides along the first direction X, respectively.

[0118] Once the upper and lower sides of the first buffer 71 are firmly bonded, it ceases to be a separate pad that could slip or deform inconsistencies. It transforms into a viscoelastic structural layer connecting the end heat exchanger 521 and the second housing 30. This combines the three originally independent components—the end heat exchanger 521, the first buffer 71, and the second housing 30—into a robust composite structure. When the battery assembly 100 is subjected to stress (such as impact from the road surface), this composite structure can cooperatively resist deformation, reducing warping and vibration at the bottom of the entire housing assembly, thereby improving the overall rigidity of the battery assembly 100.

[0119] Under strong vibration or impact, if the first buffer 71 is simply placed without being secured, it may shift or even detach, leading to buffer failure and abnormal noise within the housing assembly. Double-sided adhesive bonding firmly locks it in place.

[0120] In the above solution, by sequentially bonding the end heat exchange component 521, the first buffer component 71, and the second housing 30, the overall rigidity of the battery device 100 can be further improved, and the reliability of the battery device 100 can be further enhanced.

[0121] In some embodiments, an end heat exchange channel 525 is formed inside the heat exchange shell 523, and the end heat exchange channel 525 is divided into a plurality of end heat exchange sub-channels 526 by reinforcing ribs 524.

[0122] The reinforcing ribs 524 divide the large flow channel into multiple parallel end heat exchange sub-channels 526 with smaller cross-sectional areas, guiding the heat exchange cutoff to be more evenly distributed across various regions of the heat exchange shell 523. This reduces flow dead zones and ensures that each end heat exchange sub-channel 526 can effectively remove heat from its corresponding cell 20 region, thereby improving overall heat exchange efficiency and temperature uniformity.

[0123] In the above scheme, the heat exchange flow rate of the end heat exchanger 521 can be increased through multiple end heat exchange sub-channels 526, thereby improving the heat exchange effect.

[0124] Optionally, the end heat exchanger 521 can be made of metal, and the reinforcing rib 524 itself is embedded in the flow channel. Its metal structure also becomes a bridge for heat transfer between the heat exchange medium and the heat exchange shell 523, which is equivalent to adding internal heat dissipation fins and further improving the overall heat exchange capacity.

[0125] In some embodiments, the end heat exchange sub-channel 526 extends along the second direction Y.

[0126] Each end heat exchange sub-channel 526 acts like a thermal management ruler, running along one side of the entire row of battery cells 20. When the heat exchange cutoff flows from one end of the end heat exchange sub-channel 526 to the other, it simultaneously heats the entire row of battery cells 20, ensuring that the bottom of each battery cell 20 in the same row is in contact with the same end heat exchange sub-channel 526, which maintains a relatively constant temperature, thereby reducing the temperature difference of the battery cells 20 in the second direction Y.

[0127] The above solution can cover multiple battery cells 20 in the battery cell assembly 40, perform heat exchange for multiple battery cells 20, and improve the temperature uniformity among battery cells 20.

[0128] In some embodiments, there are multiple reinforcing ribs 524, which are spaced apart along the third direction Z. This can further increase the strength of the end heat exchanger 521 and improve the temperature uniformity of each part of the battery cell 20 along the third direction Z.

[0129] Figure 9 This is a structural schematic diagram of the second housing and mounting components according to some embodiments of this application.

[0130] like Figure 9 As shown, in some embodiments, the second housing 30 includes a bottom plate 31 and a side panel 32 connected along the outer periphery of the bottom plate 31. The mounting assembly 60 includes a first mounting member 61, which includes a bottom support portion 611 and a mounting portion 612. The mounting portion 612 bends from the bottom support portion 611 toward the first housing 10. The bottom support portion 611 is disposed on the side of the bottom plate 31 away from the first housing 10.

[0131] The first mounting component 61 can be a one-piece molded structure, or the first mounting component 61 can be assembled from a base support 611 and a mounting part 612. The base support 611 can be welded to the base plate 31, or connected by clips, bolts, etc.

[0132] The base support 611 is located directly beneath the base plate 31 of the second housing 30, effectively adding a sturdy base to the battery device 100. It directly supports most of the weight of the battery device 100 and distributes the pressure generated by this weight over a large area across the entire base plate 31. This reduces localized deformation of the base plate 31 under heavy pressure and enhances the bending and compressive strength of the battery device 100.

[0133] The mounting section 612 bends upward from the base section 611, transforming the first mounting member 61 from a simple tray into a three-dimensional connecting frame. This bending structure creates lateral connection points. It can transfer some of the mounting force from external structures (such as vehicle body longitudinal beams) to the base plate 31 via the base section 611, and the other part to the housing assembly via the connection with the side panel 32 or the first housing 10.

[0134] In the above solution, the design of the base 611 and the mounting part 612 not only strengthens the mechanical strength of the battery device 100 and optimizes the stress distribution, but also achieves a compact structure and convenient installation.

[0135] In some embodiments, the second housing 30 further includes a flange 33, which is connected to the side of the side panel 32 away from the bottom plate 31; the mounting portion 612 includes a first bending section 613 and a second bending section 614, the first bending section 613 is connected to the bottom support portion 611, and the second bending section 614 is connected to the side of the first bending section 613 away from the bottom support portion 611. The first bending section 613 bends from the bottom support portion 611 toward the first housing 10, and the second bending section 614 bends from the first bending section 613 toward the direction away from the cavity; the second bending section 614 is connected to the flange 33.

[0136] The number of flanges 33 can be multiple, and the multiple flanges 33 are arranged at intervals along the first direction X. The second housing 30 can be a one-piece molded structure, or the flanges 33 can be connected to the side wall 32 by welding, bolts, or other means. The connection between the flanges 33 and the top of the side wall 32 is equivalent to creating a reinforcing frame at the edge of the opening of the second housing 30, which enhances the rigidity and deformation resistance of the opening of the second housing 30 and reduces the risk of it opening or twisting under stress.

[0137] The first bending segment 613 bends upwards and is a transition segment that connects from the bottom support to the side, guiding the force flow path from the vertical direction to the horizontal direction.

[0138] The second bending section 614 bends outward and is a crucial connecting section. Its outward bend allows it to fit snugly against the flange 33 located at the top of the side panel 32. The base support 611, the first bending section 613, the second bending section 614, and the flange 33 work together to form a robust three-dimensional enclosure structure for the second housing 30, extending from the bottom, sides, and top edge of the battery pack.

[0139] The second bending section 614 and the flanged portion 33 can be connected by welding, bonding, or bolts. The first mounting member 61 now has two connection areas with the second housing 30: one is the base support 611 and the base plate 31, and the other is the second bending section 614 and the flanged portion 33. This two-point fixation provides connection strength and stability exceeding that of a single-point connection. When the flanged portion 33 and the second bending section 614 are firmly connected, the first mounting member 61, the side wall 32 and the base plate 31 of the second housing 30 are tightly integrated into a whole, enhancing the overall rigidity and torsional resistance of the second housing 30 of the battery device 100.

[0140] In the above scheme, the structural rigidity of the mounting component 60 is enhanced by the design of the flange 33 and multiple bending sections, thereby providing a stable and reliable mounting method for the battery device 100 in a compact space.

[0141] In some embodiments, the second bent section 614 is provided with a first groove 615 recessed in the direction toward the second housing 30; and / or, the flange portion 33 is provided with a second groove 331 recessed in the direction toward the second housing 30.

[0142] During assembly, when the first mounting component 61 and the second housing 30 are closed, the edges of the first groove 615 and / or the second groove 331 can serve as a mechanical positioning reference. The operator or robot can quickly align the two, ensuring they are in the correct relative position before welding.

[0143] The battery pack assembly and mounting brackets of the battery device 100 are typically made of thin steel or aluminum sheets. Direct welding on thin sheets is highly susceptible to burn-through or incomplete welds due to improper heat input control. The stamped grooves, however, have a material thickness at the bottom region that is actually greater than the nominal thickness of the base material. This provides a thicker, more heat-resistant connection area for welding, reducing the risk of burn-through, improving the density and strength of the weld, and enhancing the fatigue resistance of the connection point under long-term vibration loads.

[0144] In the above solution, the first groove 615 and / or the second groove 331 facilitate positioning and increase the connection quality between the mounting component 60 and the second housing 30.

[0145] Figure 10 This is a structural schematic diagram of the second housing and mounting assembly according to other embodiments of this application; Figure 11 This is another partial cross-sectional schematic diagram of a battery device according to some embodiments of this application.

[0146] Please refer to the following: Figure 10 and Figure 11 In some embodiments, the mounting assembly 60 further includes a second mounting member 62 connected to the flange portion 33, the second mounting member 62 being disposed on the side of the flange portion 33 opposite to the first mounting member 61.

[0147] There can be multiple second mounting members 62, which are spaced apart along the first direction X. The multiple second mounting members 62 can be connected to the multiple flanges 33 in a one-to-one correspondence.

[0148] The number of second bending segments 614 of the first mounting member 61 can also be multiple. Multiple second bending segments 614 are arranged at intervals along the first direction X. Multiple second bending segments 614, multiple flanges 33 and multiple second mounting members 62 are arranged in one-to-one correspondence and are connected to each other.

[0149] The first mounting member 61 and the second mounting member 62 are located on the upper and lower sides of the flange 33, respectively. The flange 33 is tightly clamped in the middle by bolts or welding, forming a robust composite sandwich structure. This structure can resist the torque that causes bending or torsional deformation of the housing assembly. When the battery device 100 is subjected to complex loads, this clamping node is less prone to relative rotation or displacement, providing high structural rigidity and stability for the entire battery device 100.

[0150] In the above scheme, the structural strength of the mounting assembly 60 is further increased by adding a second mounting component 62.

[0151] In some embodiments, the second mount 62 is provided with a first protrusion 621 that protrudes in a direction away from the second housing 30.

[0152] The first protrusion 621 can function as a one-piece, three-dimensional reinforcing rib 524. It transforms the second mounting member 62 from a flat plate into a partially box-shaped structure, significantly improving the area's resistance to bending and crushing. When subjected to pressure or complex loads from external structures, the first protrusion 621 reduces the likelihood of the second mounting member 62 denting or deforming, thus improving the stiffness and stability of the connection point.

[0153] In the above scheme, the first protrusion 621 can increase the structural strength of the second mounting member 62.

[0154] In some embodiments, the mounting assembly 60 further includes a reinforcing post 63, which passes through the second mounting member 62 and the flange portion 33 in sequence, and the end of the reinforcing post 63 abuts against the first mounting member 61.

[0155] The second mounting member 62 may be provided with a first through hole, and the flange 33 may be provided with a second through hole. The reinforcing post 63 may pass through the first through hole and the second through hole in sequence, so that the end of the reinforcing post 63 can abut against the upper side of the first mounting member 61.

[0156] The reinforcing column 63 passes sequentially through the second mounting member 62 and the flanged portion 33, and finally abuts against the first mounting member 61, connecting the three components in series and pre-tightening them into a single unit. This eliminates the tiny gaps that may exist when the components are stacked, as well as the relative slippage or interlayer compression that may occur under high loads. This improves the stiffness of the entire mounting node in all directions, forming a rigid block that is not easily deformed.

[0157] In the above scheme, the reinforcing column 63 integrates the scattered components into a robust whole through rigid interconnection, which increases the reliability of the connection.

[0158] In some embodiments, the base portion 611 is provided with a second protrusion 616 that protrudes in a direction away from the second housing 30.

[0159] The projections of the second protrusion 616 and the bottom plate 31 of the second housing 30 along the first direction X do not overlap, that is, the second protrusion 616 and the bottom plate 31 do not interfere with each other.

[0160] When a flat base plate 31 is subjected to pressure from above, it relies mainly on the bending strength of the material itself, making it prone to sinking deformation in the central area. The outwardly protruding second bulge 616, however, acts as an integrally formed reinforcing rib 524 or load-bearing beam on the flat plate, improving bending and compressive stiffness. This three-dimensional structure can disperse and resist vertical pressure and bending moment. It strengthens the base support 611 from a deformable surface into a robust frame, reducing deformation under the weight of the battery device 100 and road impacts, ensuring the stability of the support.

[0161] In the above scheme, the second protrusion 616 can increase the structural strength of the base support 611 and improve its load-bearing capacity.

[0162] Figure 12 This is a top view of a thermal management component according to some embodiments of this application; Figure 13 This is a cross-sectional schematic diagram of a battery device according to some embodiments of this application.

[0163] Please refer to the following: Figure 12 and Figure 13 In some embodiments, the battery device 100 includes a plurality of battery cell assemblies 40 arranged along a third direction Z; the thermal management assembly 50 includes a current collector 51 and a plurality of heat exchangers 52 connected to the current collector 51, the plurality of heat exchangers 52 being spaced apart along the third direction Z, and each heat exchanger 52 including two end heat exchangers 521 and at least one intermediate heat exchanger 522; along the third direction Z, the intermediate heat exchanger 522 is located between the two end heat exchangers 521; wherein the intermediate heat exchanger 522 is heat-exchange connected to two adjacent battery cell assemblies 40.

[0164] The heat exchange elements 52 of the thermal management assembly 50 are divided into three categories according to their arrangement along the third direction Z. The end heat exchange element 521 at one end is the outermost first heat exchange element 52 arranged along the third direction Z, for example, the leftmost one. The end heat exchange element 521 at the other end is the outermost last heat exchange element 52 arranged along the third direction Z, for example, the rightmost one.

[0165] The intermediate heat exchanger 522 is located between the two end heat exchangers 521, and the number of intermediate heat exchangers 522 can be one or more.

[0166] The end heat exchanger 521 can be fixedly connected to the second housing 30 along the first direction X and facing the second housing 30 by means of adhesive, bolts or other structures.

[0167] The intermediate heat exchanger 522 and the end heat exchanger 521, with their ends near the collector 51, can be located on the same side of the collector 51 and fixed to it. The intermediate heat exchanger 522 and the end heat exchanger 521 can be connected to the collector 51 by welding, snap-fitting, bonding, or other methods.

[0168] The end heat exchange channel 525 in the end heat exchanger 521 can be connected in series with the intermediate heat exchange channel in the intermediate heat exchanger 522, and the intermediate heat exchange channels of multiple intermediate heat exchangers 522 can be connected in parallel.

[0169] The intermediate heat exchanger 522 can be bonded to two adjacent battery cell assemblies 40 on the side facing the battery cell assembly 40. The projection of the intermediate heat exchanger 522 along the first direction X covers at least a portion of the adjacent battery cell assemblies 40, that is, the intermediate heat exchanger 522 covers the shoulders of two adjacent battery cell assemblies 40 respectively. For example, the projection of the intermediate heat exchanger 522 along the first direction X will simultaneously cover the right side area of ​​the left battery cell assembly 40 and the left side area of ​​the right battery cell assembly 40, at which time the intermediate heat exchanger 522 can simultaneously contact two adjacent battery cell assemblies 40.

[0170] In the above scheme, the heat exchange efficiency of the thermal management component 50 can be improved by connecting the intermediate heat exchanger 522 with the two adjacent battery cell modules 40.

[0171] Figure 14 This is another cross-sectional schematic diagram of a battery device according to some embodiments of this application.

[0172] like Figure 14 As shown, in some embodiments, the battery device 100 further includes a second buffer 72, which is located between the intermediate heat exchanger 522 and the second housing 30 along the first direction X.

[0173] The battery cell 20 can be inverted, with the electrode terminals 26 facing downwards. The electrode terminals 26 and the intermediate heat exchangers 522 are spaced apart along the third direction Z, with the positive and negative electrode terminals 26 located between two adjacent intermediate heat exchangers 522. There is a gap between the electrode terminals 26 and the second housing 30 along the third direction Z. Placing the intermediate heat exchangers 522 within this gap allows for full utilization of the internal space of the battery device 100 without sacrificing the installation space of the battery cells 20.

[0174] The second buffer 72 can be made of materials such as foam or rubber. When the intermediate heat exchanger 522 vibrates up and down with the battery cell 20, the second buffer 72 will absorb the impact force through its own deformation, reducing the transmission of vibration to the battery cell 20. This is equivalent to adding an elastic pad under the intermediate heat exchanger 522, which to a certain extent prevents the battery cell 20 from deforming the outer shell 24 and damaging the internal cells due to hard impact.

[0175] In the above scheme, the second buffer 72 can protect the battery cell 20 on the upper side of the intermediate heat exchanger 522, further improving the reliability of the battery device 100.

[0176] Optionally, the structural strength of the first buffer 71 is greater than that of the second buffer 72. For example, the material of the first buffer 71 may include polycarbonate, polyethylene, etc., while the material of the second buffer 72 may include foam, rubber, etc. This allows the first buffer 71 located at the end to have greater load-bearing capacity, enabling it to better support the battery cell assembly 40 together with the mounting assembly 60 and the end heat exchanger 521.

[0177] Figure 15 This is a partially exploded structural diagram of a thermal management component according to some embodiments of this application.

[0178] like Figure 15 As shown, in some embodiments, the current collector 51 includes a first flow channel 511 and a second flow channel 512 arranged adjacent to each other, and the intermediate heat exchanger includes an inlet flow channel 5221 and an outlet flow channel 5222. The flow direction of the heat exchange medium in the inlet flow channel 5221 is away from the current collector 51, and the flow direction of the heat exchange medium in the outlet flow channel 5222 is towards the current collector 51. The inlet flow channel 5221 is connected to the first flow channel 511, and the outlet flow channel 5222 is connected to the second flow channel 512.

[0179] A first through hole can be provided in the first flow channel 511, and the liquid inlet flow channel 5221 of the intermediate heat exchanger 522 is connected to the first flow channel 511 through the first through hole. A second through hole can be provided in the second flow channel, and the liquid outlet flow channel 5222 of the intermediate heat exchanger 522 is connected to the second flow channel 512 through the second through hole.

[0180] The first flow channel 511 and the second flow channel 512 are not connected to each other. The first flow channel 511 is used for liquid inlet, and the second flow channel 512 is used for liquid outlet. The heat exchange medium flows through the first flow channel 511 to the liquid inlet flow channel 5221 of each intermediate heat exchanger 522, and then flows out from the liquid outlet flow channel 5222 of each intermediate heat exchanger 522, and merges in the second flow channel 512 of the collector 51.

[0181] In the above scheme, the current collector 51 integrates the adjacent first flow channel 511 and second flow channel 512 to undertake the liquid supply and return of multiple intermediate heat exchangers. It is not necessary to design independent external liquid inlet pipes and liquid return pipes for each intermediate heat exchanger. Moreover, the first flow channel 511 and the second flow channel 512 are arranged adjacent to each other, which improves the integration of the thermal management component 50, simplifies the structure, and can improve the energy density of the battery device 100.

[0182] According to some embodiments of this application, this application provides a battery device 100, which includes a housing assembly, a battery cell assembly 40, a thermal management assembly 50, and a mounting assembly 60. The housing assembly includes a first housing 10 and a second housing 30 arranged along a first direction X. The first housing 10 and the second housing 30 are interconnected to form a cavity, and the first housing 10 is located on the upper side of the second housing 30. The battery cell assembly 40 is located in the cavity and includes a plurality of battery cells 20 stacked along a second direction Y. Each battery cell 20 includes a housing 24 and an electrode terminal 26, with the electrode terminal 26 disposed on the side of the housing 24 facing the second housing 30. The thermal management assembly 50... The thermal management component 50, located between the battery cell assembly 40 and the second housing 30, includes a current collector 51 and an end heat exchanger 521 connected to the current collector 51. The end heat exchanger 521 and the electrode terminal 26 are spaced apart along the third direction Z. The end heat exchanger 521 includes a heat exchange shell 523 and reinforcing ribs 524 disposed inside the heat exchange shell 523. At least a portion of the mounting component 60 is disposed on the side of the second housing 30 away from the first housing 10 in the first direction X. The mounting component 60 is used to mount to an external structure. Along the first direction X, the end heat exchanger 521 and the mounting component 60 at least partially overlap. The first direction X, the second direction Y, and the third direction Z intersect each other. The end heat exchanger 521 is fixedly connected to the second housing 30.

[0183] The battery device 100 provided according to the embodiments of this application includes the battery cell 20 provided in the embodiments. Since the battery device 100 provided in the embodiments of this application adopts the battery cell 20 provided in the above embodiments, it has the same technical effect, which will not be repeated here.

[0184] The electrical device provided according to the embodiments of this application includes the battery device 100 provided in the above embodiments, and the battery device 100 is used to provide electrical energy.

[0185] The power supply device provided according to the embodiments of this application has the same technical effect as the battery device 100 provided in the embodiments of this application, and will not be described again here.

[0186] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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: The enclosure assembly includes a first enclosure and a second enclosure arranged along a first direction, the first enclosure and the second enclosure being interconnected to form a cavity, and the first enclosure being located on the upper side of the second enclosure; A battery cell assembly is located within the cavity. The battery cell assembly includes a plurality of battery cells stacked along a second direction. Each battery cell includes a housing and electrode terminals, with the electrode terminals disposed on the side of the housing facing the second housing. A thermal management component is disposed between the battery cell assembly and the second housing. The thermal management component includes a current collector and an end heat exchanger connected to the current collector. The end heat exchanger and the electrode terminal are spaced apart along a third direction. The end heat exchanger includes a heat exchange shell and reinforcing ribs disposed inside the heat exchange shell. A mounting assembly, at least a portion of which is disposed on the side of the second housing opposite to the first housing in the first direction, the mounting assembly being used to mount to an external structure, wherein the end heat exchanger overlaps at least partially with the mounting assembly along the first direction; wherein the first direction, the second direction, and the third direction are intersecting each other.

2. The battery device according to claim 1, characterized in that, The end heat exchanger is fixedly connected to the second housing.

3. The battery device according to claim 1, characterized in that, The battery device further includes a first buffer member, which is disposed between the end heat exchange member and the second housing along the first direction.

4. The battery device according to claim 3, characterized in that, The first buffer is bonded and fixed to the end heat exchanger and the second housing on opposite sides along the first direction, respectively.

5. The battery device according to claim 1, characterized in that, The heat exchange shell has an end heat exchange channel inside, which is divided into multiple end heat exchange sub-channels by the reinforcing ribs.

6. The battery device according to claim 5, characterized in that, The end heat exchange sub-channel extends along the second direction.

7. The battery device according to claim 5, characterized in that, The number of reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged at intervals along the third direction.

8. The battery device according to any one of claims 1-7, characterized in that, The second housing includes a bottom plate and a side panel connected along the outer periphery of the bottom plate. The mounting assembly includes a first mounting member, which includes a base support and a mounting portion. The mounting portion bends from the base support towards the first housing. The base support is located on the side of the bottom plate away from the first housing.

9. The battery device according to claim 8, characterized in that, The second housing also includes a flanged portion, which is connected to the side of the side panel away from the bottom plate; The mounting section includes a first bending section and a second bending section. The first bending section is connected to the base support section, and the second bending section is connected to the side of the first bending section away from the base support section. The first bending section bends from the base support section toward the first housing, and the second bending section bends from the first bending section away from the cavity. The second bending section is connected to the flanged portion.

10. The battery device according to claim 9, characterized in that, The second bending section is provided with a first groove recessed in the direction toward the second housing; and / or, the flange portion is provided with a second groove recessed in the direction toward the second housing.

11. The battery device according to claim 9, characterized in that, The mounting assembly further includes a second mounting member connected to the flange portion, the second mounting member being disposed on the side of the flange portion opposite to the first mounting member.

12. The battery device according to claim 11, characterized in that, The second mounting component is provided with a first protrusion that protrudes in a direction away from the second housing.

13. The battery device according to claim 11, characterized in that, The mounting assembly also includes a reinforcing post, which passes through the second mounting member and the flange in sequence, and the end of the reinforcing post abuts against the first mounting member.

14. The battery device according to claim 8, characterized in that, The base portion is provided with a second protrusion that protrudes in a direction away from the second housing.

15. The battery device according to any one of claims 1-7, characterized in that, The battery device includes a plurality of battery cell assemblies, which are arranged along a third direction. The thermal management assembly includes a current collector and a plurality of heat exchangers connected to the current collector. The plurality of heat exchangers are spaced apart along the third direction. Each heat exchanger includes two end heat exchangers and at least one intermediate heat exchanger. Along the third direction, the intermediate heat exchanger is located between the two end heat exchangers. The intermediate heat exchanger is heat-exchange connected to the two adjacent battery cell assemblies.

16. The battery device according to claim 15, characterized in that, The battery device further includes a second buffer, which is located between the intermediate heat exchanger and the second housing along the first direction.

17. The battery device according to claim 15, characterized in that, The current collector includes a first flow channel and a second flow channel arranged adjacent to each other. The intermediate heat exchanger includes an inlet flow channel and an outlet flow channel. The flow direction of the heat exchange medium in the inlet flow channel is away from the current collector, and the flow direction of the heat exchange medium in the outlet flow channel is towards the current collector. The inlet flow channel is connected to the first flow channel, and the outlet flow channel is connected to the second flow channel.

18. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-17, the battery device being used to provide electrical energy.

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